Polyurethane-based reactive mass and its use for the production of coatings

A polyurethane-based reactive mass composed of PA0 (a) at least one organic compound in the molecular weight range of from 400 to 12000 containing isocyanate reactive groups and having a functionality from 2 to 8, PA0 (b) optionally an organic compound in the molecular weight range of from 62 to 399 containing isocyanate reactive groups and having a functionality from 2 to 8. PA0 (c) catalysts, PA0 (d) aliphatic isocyanate compounds and PA0 (e) optionally other auxiliary agents and additives known per se, characterized in that the aliphatic isocyanate compound used is one based on hexamethylene diisocyanate, hydrogenated diphenylmethane diisocyanate or isophorone diisocyanate containing isocyanurate and/or uretdione units and/or urethane and/or uretoneimine and/or oxadiazatrione groups is suitable for the production of lightfast coatings, including coatings in light colors, in particular for the formation of edgings round wooden panels without these panels having first to be dried down to the maximum dampness of 7% by weight.

This invention relates to a polyurethane-based reactive mass consisting of 
a special aliphatic isocyanate component, a polyol component and the usual 
additives, and to the use of this reactive mass for the production of 
coatings used in particular in the furniture industry. 
The invention relates in particular to a process for forming edgings round 
wooden panels, in particular chipboard and plywood panels, using a 
reactive mass of the kind defined above to produce an edging which is 
lightfast even in light colours without the wooden panel round which the 
edging is to be formed having first to be maximally dried down to a 
moisture content of 7% by weight. 
When the wooden panels of furniture are covered at the corners and edges 
with edging strips or directly coated with plastics, these covers and 
coatings are liable to become detached by environmental influences and 
wear and tear. The cut edges of wooden panels produced in various 
thicknesses and forms and cut to certain dimensions must, however, be 
sealed for various reasons: 
(a) to adapt the cut edge to the design of the surface, 
(b) to seal off against moisture since wooden panels readily swell, 
(c) to serve as a protection against pieces breaking out of the wooden 
panels, and 
(d) to prevent injury and damage to other bodies knocking against the edge 
of the wooden panels. 
When edging strips or direct coatings become detached from a piece of 
furniture, the sharp edges produced constitute a source of danger and a 
health hazard in office, home, school, etc. Although this difficulty can 
to a large extent be countered by the use of solid wooden edging strips, 
the application of such strips entails a considerable additional amount of 
labour and increases the cost of the product to an undesirable extent. 
Mechanical processes applied to systems based on polyurethanes have already 
been proposed as an alternative to solid wood edging (see also 
Kunststoff-Journal 1982, No.8, page 47). There are two different types of 
such processes, which are distinguished according to the nature of the 
wooden panels and the polyurethane systems. 
In the first process, the polyurethanes used are prepared from aromatic 
diisocyanates. These have the advantage that the usual wood moisture 
content of 8 to 10% by weight obtained by normal dry storage of the cut 
wooden panel does not interfere with the process of applying the edging 
strip. The disadvantage of this system, however, is that due to the 
aromatic diisocyanates, the polyurethane edging produced is not lightfast 
and therefore can only be offered for use in dark colours. 
The second method employs hexamethylene diisocyanate or isophorone 
diisocyanate and results in lightfast polyurethanes. With this system, 
therefore, it is possible to produce polyurethane edges which are 
colourless or light in colour and have no tendency to yellowing. The 
disadvantages of this system arise from the fact that a more powerful 
catalytic action is necessary owing to the well-known low reactivity of 
aliphatic isocyanates, and this catalytic action results in a very short 
working life as well as enabling side reactions to take place with the 
moisture content of the wood. This means that only wooden panels which 
have been maximally dried down to a moisture content of 7% by weight can 
be satisfactorily treated by this method. A 7% by weight moisture content 
in wood, however, can only be achieved if suitable drying apparatus are 
used for the wooden panels. 
It is an object of the present invention to prepare a reactive mass based 
on polyurethanes, which may be satisfactorily used for coating wooden 
panels, particularly for coating the edges, without the wood having first 
to be dried to moisture contents below 8 to 10% by weight (usual moisture 
content of wooden panels). At the same time, the working time is required 
to be sufficiently long and the dwell time in the mould as short as 
possible. Lastly, the mass should also be suitable for forming lightfast 
colourless or light coloured coatings and edges. 
It was surprisingly found that these objects could be achieved by using the 
isocyanate compounds described below. 
The present invention thus relates to a polyurethane-based reactive mass 
composed of 
(a) at least one organic compound in the molecular weight range of from 400 
to 12000 containing isocyanate reactive groups and having a functionality 
from 2 to 8, 
(b) optionally an organic compound in the molecular weight range of from 62 
to 399 containing isocyanate reactive groups and having a functionality 
from 2 to 8, 
(c) catalyst, 
(d) aliphatic isocyanate compounds and 
(e) optionally other auxiliary agents and additives known per se, 
characterised in that the aliphatic isocyanate compound used is one based 
on hexamethylene diisocyanate, hydrogenated diphenylmethane diisocyanate 
or isophorone diisocyanate containing isocyanurate and/or uretdione units 
and/or urethane and/or uretoneimine and/or oxadiazatrione and/or biuret 
groups and the catalyst used is preferably a tin catalyst. 
The invention further relates to a process using the reactive mass 
according to the invention for coating surfaces, preferably surfaces of 
wood or wood by-products such as chipboard and plywood panels. 
The cured lightfast coatings not only fulfil the present day requirements 
of the law and of customers concerning the safety of furniture products 
but also leave the furniture designer every freedom to adjust the degree 
of curvature of corners and edges as desired as well as considerably 
reducing the manufacturing costs compared with those required for applying 
solid edge strips. Furthermore, the second coatings have satisfactory 
mechanical properties. They can be adjusted to almost any degree of 
hardness by varying the compounds put into the process. The material may 
also be coloured in light colour shades. 
100 Parts by weight of component (a) are generally used with 0 to 50 parts 
by weight of (b), 0.001 to 5 parts by weight of (c) and 10 to 100 parts by 
weight of (d), preferably 5 to 20 parts by weight of (b), 0.01 to 2.5 
parts by weight of (c) and 10 to 50 parts by weight of (d). 
The catalyst component (c) may be incorporated both with the isocyanate 
component and with the polyol component, and (a), (b) and (c) may be used 
in various proportions to produce either an OH prepolymer, which is 
subsequently cured with the remaining quantities of isocyanate compound, 
or an isocyanate prepolymer, which is subsequently cured with the polyol 
compounds of (a) and/or (b). 
The substances used as starting component (a) are compounds having a 
molecular weight of from 400 to 12000 and containing at least two 
isocyanate reactive groups. 
These may be compounds containing amino groups, thiol groups or carboxyl 
groups but are preferably compounds containing hydroxyl groups and having 
a functionality from 2 to 8 and preferably a molecular weight of from 500 
to 3000. Examples of such compounds include polyesters, polyethers, 
polythioethers, polyacetals, polycarbonates and polyester amides 
containing at least 2, generally 2 to 8, preferably 2 to 4 hydroxyl 
groups, of the kind known per se for the production of both homogeneous 
and cellular polyurethanes. 
The hydroxyl polyesters used may be, for example, reaction products of 
polyhydric, preferably dihydric alcohols with polybasic, preferably 
dibasic carboxylic acids. Instead of using free polycarboxylic acids, the 
corresponding polycarboxylic acid anhydrides or corresponding 
polycarboxylic acid esters of low alcohols or mixtures thereof may be used 
for the preparation of the polyesters. Polycarboxylic acids may be 
aliphatic, cycloaliphatic, aromatic and/or heterocyclic and may be 
substituted, e.g. with halogen atoms, and/or unsaturated. 
The following are given as examples of such carboxylic acids and their 
derivatives: 
Succinic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, 
phthalic acid, isophthalic acid, trimellitic acid, phthalic acid 
anhydride, tetrahydrophthalic acid anhydride, hexahydrophthalic acid 
anhydride, tetrachlorophthalic acid anhydride, endomethylene 
tetrahydrophthalic acid anhydride, glutaric acid anhydride, maleic acid, 
maleic acid anhydride, fumaric acid, dimerised and trimerised unsaturated 
fatty acids optionally mixed with monomeric unsaturated fatty acids such 
as oleic acid; dimethylterephthalate and terephthalic acid-bis-glycol 
esters. Suitable polyhydric alcohols include, for example, ethylene 
glycol, propylene glycol-(1,2) and -(1,3), butylene glycol-(1,4) and 
-(2,3), hexanediol(1,6), octanediol-(1,8), neopentyl glycol, 
1,4-bis-hydroxymethylcyclohexane, 2-methyl-1,3-propanediol, glycerol, 
trimethylol propane, hexanetriol-(1,2,6), butanetriol(1,2,4), 
trimethylolethane, pentaerythritol, quinitol, mannitol and sorbitol, 
formitol, methyl glycoside, diethyleneglycol, triethyleneglycol, 
tetraethyleneglycol and higher polyethyleneglycols, dipropyleneglycol and 
higher polypropyleneglycols, dibutyleneglycol and higher 
polybutyleneglycols. The polyesters may contain a proportion of carboxyl 
end groups. Polyesters of lactones such as .epsilon.-caprolactone or of 
hydroxycarboxylic acids such as .omega.-hydroxycaproic acid may also be 
used. 
The hydroxylpolyethers which may be used according to the invention contain 
at least two, generally two to eight, preferably two or three hydroxyl 
groups and which are also known per se and may be prepared, for example, 
by the polymerisation of epoxides such as ethylene oxide, propylene oxide, 
butylene oxide, tetrahydrofuran, styrene oxide or epichlorohydrin, either 
on their own, e.g. in the presence of Lewis catalysts such as BF.sub.3, or 
by chemical addition of these epoxides, preferably of ethylene oxide and 
propylene oxide, optionally as mixtures or successively, to starting 
components containing reactive hydrogen atoms, such as water, alcohols, 
ammonia or amines, e.g. ethylene glycol, propylene glycol-(1,3) or -(1,2), 
trimethylolpropane, glycerol, sorbitol, 4,4'-dihydroxy-diphenylpropane, 
aniline, ethanolamine or ethylene diamine. Sucrose polyethers may also be 
used according to the invention, e.g. those described in DE-AS Nos. 1 176 
358 and 1 064 938, as may also polyethers which have been started on 
formitol or formose (DE-OS Nos. 2 639 083 and 2 737 951). It is frequently 
preferred to use polyethers containing predominantly primary OH groups (up 
to 90% by weight thereof, based on all the OH groups present in the 
polyether). Polybutadienes containing OH groups are also suitable for the 
purpose of this invention. 
Suitable polythioethers are in particular the condensation products 
obtained by condensing thiodiglycol on its own and/or with other glycols, 
dicarboxylic acids, formaldehyde, aminocarboxylic acids or amino alcohols. 
The products obtained vary according to the cocomponent and may be, for 
example, polythio mixed ethers, polythio ether esters or polythioether 
ester amides. 
Suitable polyacetals include, for example, the compounds obtainable from 
glycols such as diethyleneglycol, triethyleneglycol, 
4,4'-dioxethoxy-diphenyldimethylmethane, hexanediol and formaldehyde. 
Polyacetals suitable for the purpose of the invention may also be prepared 
by the polymerisation of cyclic acetals such as trioxane (DE-OS 1 694 
128). 
Suitable polycarbonates containing hydroxyl groups are known per se, e.g. 
those obtainable by the reaction of diols such as propanediol-(1,3), 
butanediol-(1,4) and/or hexanediol-(1,6), diethyleneglycol, 
triethyleneglycol, tetraethyleneglycol or thiodiglycol with diaryl 
carbonates such as diphenyl carbonate or with phosgene (DE-AS Nos. 1 694 
080, 1 915 908 and 2 221 751, DE-OS No. 2 605 024). 
Suitable polyesteramides and polyamides include, for example, the 
predominantly linear condensates obtained from polybasic saturated or 
unsaturated carboxylic acids or their anhydrides and polyvalent saturated 
or unsaturated amino alcohols, diamines, polyamines and mixtures thereof. 
Polyhydroxyl compounds already containing urethane or urea groups and 
modified and unmodified natural products such as castor oil or 
carbohydrates such as starch or natural polyols which have been modified 
by the addition of ketone/formaldehyde condensates, e.g. according to 
DE-PS No. 1 720 710 may also be used. 
Products of the addition of alkylene oxides to phenol-formaldehyde resins 
or to urea formaldehyde resins may also be used according to the 
invention. 
The polyhydroxyl compounds mentioned above may be modified by various means 
before they are used in the polyisocyanate polyaddition process. Thus 
according to DE-OS Nos. 2 210 839 and 2 544 195, a mixture of various 
polyhydroxyl compounds (e.g. a polyether polyol and a polyester polyol) 
may be condensed by etherification in the presence of a strong acid to 
form a relatively high molecular weight polyol composed of different 
segments connected by ether bridges. Amide groups may be introduced into 
the polyhydroxyl compounds according to DE-OS No. 2 559 372, for example, 
and triazine groups may be introduced by a reaction with polyfunctional 
cyanic acid esters according to DE-OS No. 2 620 487. Polyhydroxyl 
compounds containing guanidine, phosphonoformamidine or acylurea groups 
(DE-OS Nos. 2 714 289, 2 714 292 and 2 714 293) may be obtained by 
reacting a polyol with less than the equivalent quantity of a 
diisocyanatocarbodiimide and subsequently reacting the carbodiimide group 
with an amine, amide, phosphite or carboxylic acid. 
The compounds which may be used as starting component (a) also include 
so-called aminopolyethers or aminohydroxypolyethers within the above 
mentioned molecular weight range in which at least 25 equivalents percent, 
preferably 50 and most preferably 80 to 100 equivalents percent of the 
isocyanate reactive end groups consist of primary and/or secondary, 
aromatically or aliphatically bound amino groups and the remainder consist 
of primary and/or secondary aliphatically bound hydroxyl groups. 
In these compounds, the terminal groups carrying the amino groups may also 
be linked to the polyether chain by urethane or ester groups. Preparation 
of these "aminopolyethers" is carried out in known manner. Thus, for 
example, amination of polyhydroxypolyethers such as polypropylene glycol 
ethers may be carried out by reaction with ammonia in the presence of 
Raney nickel and hydrogen (BE-PS No. 634 741). U.S. Pat. No. 3,654,370 
describes the preparation of polyoxyalkylenepolyamines by reaction of the 
corresponding polyol with ammonia and hydrogen in the presence of a 
nickel, copper or chromium catalyst. DE-PS No. 1 193 671 describes the 
preparation of polyethers containing amino end groups by the hydrogenation 
of cyanoethylated polyoxypropylene ethers. Other methods for the 
preparation of polyoxyalkylene(polyether)amines are described in U.S. Pat. 
No. 3,155,728, U.S. Pat. No. 3,236,895 and FR-PS No. 1 551 605. FR-PS 1 
466 709, for example, describes the preparation of polyethers containing 
secondary amino end groups. 
Relatively high molecular weight polyhydroxypolyethers may be converted 
into the corresponding anthranilic acid esters suitable for use as 
component (a) according to the invention by reacting them with isatoic 
acid anhydride as described, for example, in DE-OS No. 2 019 432, DE-OS 
No. 2 619 840, U.S. Pat. No. 3,808,250, U.S. Pat. No. 3,975,428 or U.S. 
Pat. No. 4,016,143. Polyethers containing aromatic amino end groups are 
obtained by this procedure. 
Relatively high molecular weight compounds containing amino end groups are 
obtained according to DE-OS No. 2 546 536 and U.S. Pat. No. 3,865,791 by 
the reaction of isocyanate prepolymers based on polyhydroxypolyethers with 
enamines, aldimines or ketimines containing hydroxyl groups, followed by 
hydrolysis. 
Other aminopolyethers within the above mentioned molecular weight range may 
also be used, for example those obtained according to DE-OS No. 2 948 419, 
DE-OS Nos. 3 039 600, 3 112 118, 3 131 252, 3 200 021, 3 144 991 or 3 223 
395. 
Other methods of preparation for relatively high molecular weight compounds 
containing amino end groups or hydrazide end groups are described in DE-OS 
No. 1 694 152. 
Polyhydroxyl compounds containing high molecular weight polyadducts or 
polycondensates or polymers in a finely dispersed or dissolved form may 
also be used according to the invention. Polyhydroxyl compounds of this 
kind are obtained, for example, when polyaddition reactions (e.g. 
reactions between polyisocyanates and amino functional compounds) or 
polycondensation reactions (e.g. between formaldehyde and phenols and/or 
amines) are carried out in situ in the above mentioned compounds 
containing hydroxyl groups. Processes of this kind have been described, 
for example, in DE-AS Nos. 1 168 075 and 1 260 142 as well as in DE-OS 
Nos. 2 324 134, 2 423 984, 2 512 385, 2 513 815, 2 550 796, 2 550 797, 2 
550 833, 2 550 862, 2 633 293 and 2 639 254. Alternatively, such compounds 
may be obtained according to U.S. Pat. No. 3,869,413 or DE-OS No. 2 550 
860 by mixing a previously prepared aqueous polymer dispersion with a 
polyhydroxyl compound and then removing the water from the mixture. 
Polyhydroxyl compounds modified by vinyl polymers such as may be obtained, 
for example, by the polymerisation of styrene and acrylonitrile in the 
presence of polyethers (U.S. Pat. Nos. 3,383,351, 3,304,273, 3,523,093 or 
3,110,695 or DE-AS No. 1 152 536) or polycarbonate polyols (DE-PS No. 1 
769 795 or U.S. Pat. No. 3,637,909) are also suitable for the process 
according to the invention. Polyether polyols which have been modified 
according to DE-OS Nos. 2 442 101, 2 644 922 or 2 646 141 by graft 
polymerisation with vinyl phosphonic acid esters and optionally 
(meth)acrylonitrile, (meth)acrylamide or OH functional (meth)acrylic acid 
esters give rise to synthetic resins with exceptional flame resistance. 
Polyhydroxyl compounds in which carboxyl groups have been introduced by 
radical graft polymerisation by means of unsaturated carboxylic acids and 
optionally other olefinically unsaturated monomers (DE-OS Nos. 2 714 291, 
2 739 620 and 2 654 746) may be used to particular advantage in 
combination with mineral fillers. 
Polyamino compounds modified with vinyl polymers and containing amino end 
groups are obtained according to DE-OS Nos. 3 112 118, 3 200 021, EP-OS 
No. 84 141 and U.S. Pat. No. 4 286 074. 
When modified polyhydroxyl compounds of the type mentioned above are used 
as starting components in the polyisocyanate polyaddition process, the 
polyurethane resins obtained in many cases have substantially improved 
mechanical properties. 
Representatives of the above mentioned compounds to be used according to 
the invention are described, for example, in High Polymers, Vol.XVI, 
"Polyurethanes, Chemistry and Technology" by Saunders-Frisch, Interscience 
Publishers, New York, London, Volume I, 1962, pages 32-42 and 44-54 and 
Volume II, 1964, pages 5-6 and 198-199 and in Kunststoff-Handbuch, Volume 
VII, Vieweg-Hochtlen, Carl-Hanser-Verlag, Munich, 1966, e.g. on pages 
45-71. Mixtures of the above mentioned compounds containing at least two 
isocyanate reactive hydrogen atoms and having a molecular weight of from 
400 to 12000, e.g. mixtures of polyethers and polyesters, may, of course, 
also be used. 
It is particularly advantageous in some cases to use combinations of low 
melting with high melting polyhydroxyl compounds (DE-OS No. 2 706 297). 
The compounds used as isocyanate reactive compounds (a) are advantageously 
difunctional and trifunctional polyethers within the OH number range of 
from 20 to 200 obtained by the chemical addition of propylene oxide and/or 
ethylene oxide to suitable starter molecules or polyethers or polyesters 
within an OH number range of from 40 to 150 which have been modified by 
polymers, or natural polyols modified with ketone-formaldehyde 
condensates. 
Compounds which may be used as starting component (b) include compounds in 
the molecular weight range of from 62 to 399 containing at least two 
isocyanate reactive hydrogen atoms. These are also understood to include 
compound containing hydroxyl groups and/or amino groups and/or thiol 
groups and/or carboxyl groups, preferably hydroxyl groups and/or amino 
groups, and serve as chain lengthening or cross-linking agents. These 
compounds generally contain 2 to 8, preferably 2 to 4 isocyanate reactive 
hydrogen atoms. 
These again may be used in the form of mixtures of different compounds 
containing at least two isocyanate reactive hydrogen atoms and having a 
molecular weight in the range of from 62 to 399. 
The following are given as examples of such compounds: Ethylene glycol, 
propylene glycol-(1,2) and -(1,3), butylene glycol-(1,4) and -(2,3), 
pentanediol-(1,5), hexanediol(1,6), octanediol-(1,8), neopentyl glycol, 
1,4-bis-hydroxy-methyl-cyclohexane, 2-methyl-1,3-propanediol, 
dibromobutenediol, glycerol, trimethylolpropane, hexanetriol-(1,2,6), 
trimethylolethane, pentaerythritol, quinitol, mannitol and sorbitol, 
castor oil, diethylene glycol, triethylene glycol, tetraethylene glycol, 
higher polyethylene glycols with a molecular weight of up to 399, 
dipropylene glycol, higher polypropylene glycols with a molecular weight 
of up to 399, dibutylene glycol, higher polybutylene glycols with a 
molecular weight of up to 399, 4,4'-dihydroxy-diphenylpropane, 
dihydroxymethylhydroquinone, ethanolamine, diethanolamine, 
diisopropanolamine, N-methyldiethanolamine, triethanolamine and 3- and 
2-aminopropanol. 
The low molecular weight polyols used according to the invention may also 
be mixtures of hydroxyaldehydes and hydroxyketones ("formoses") and the 
polyhydric alcohols ("formitol") obtained from them by reduction, such as 
the compounds which may be obtained from the condensation of formaldehyde 
hydrate with itself in the presence of metal compounds as catalysts and 
compounds capable of enediol formation as cocatalysts (DE-OS Nos. 2 639 
084, 2 714 084, 2 714 104, 2 721 186, 2 738 154 and 2 738 512). These 
formoses are advantageously used in combination with aminoplast formers 
and/or phosphites (DE-OS Nos. 2 738 513 and 2 738 532) for producing 
synthetic resins with improved flame-resistance. Solutions of 
polyisocyanate polyaddition products, in particular of 
polyhydrazodicarbonamides and/or polyurethaneureas containing ionic 
groups, in low molecular weight, polyhydric alcohols may also be used as 
polyol components according to the invention (DE-OS No. 2 638 759). 
Examples of aliphatic diamines suitable for the purpose of the invention 
include ethylenediamine, 1,4-tetramethylene diamine, 1,11-undecamethylene 
diamine, 1,12-dodecamethylene diamine and mixtures thereof, 
1-amino-3,3,5-trimethyl-5-aminomethylcyclohexane ("isophorone diamine"), 
2,4- and 2,6-hexahydrotolylenediamine and mixtures thereof, perhydro-2,4'- 
and 4,4'-diaminodiphenylmethane, p-xylylene diamine, 
bis-(3-aminopropyl)-methylamine, diamino-perhydroanthracenes (DE-OS No. 2 
638 731) and cycloaliphiatic triamines according to DE-OS No. 2 614 244. 
Hydrazine and substituted hydrazines such as methyl hydrazine, 
N,N'-dimethylhydrazine and homologues thereof and acid dihydrazides may 
also be used according to the invention, e.g. carbodihydrazide and the 
dihydrazides of oxalic acid, malonic acid, succinic acid, glutaric acid, 
adipic acid, .beta.-methyladipic acid, sebacic acid, hydracrylic acid and 
terephthalic acid; semicarbazido-alkylene-hydrazides, e.g. 
.beta.-semicarbazidopropionic acid hydrazide (DE-OS No. 1 770 591) and 
semicarbazidoalkylene-carbazic esters, e.g. 2-semicarbazidoethyl-carbazic 
ester (DE-OS No. 1 918 504) as well as aminosemicarbazide compounds, e.g. 
.beta.-aminoethyl-semicarbazidocarbonate (DE-OS No. 1 902 931). Their 
reactivity may be controlled by partly or completely blocking the amino 
groups with aldimine or ketimine groups (U.S. Pat. No. 3,734,894, DE-OS 
No. 2 637 115). 
Compounds such as 1-mercapto-3-aminopropane, amino acids such as glycine, 
alanine, valine, serine or lysine, and dicarboxylic acids such as succinic 
acid, adipic acid, phthalic acid, 4-hydroxyphthalic acid and 
4-aminophthalic acid may be used as chain lengthening agents according to 
the invention. 
Compounds which are monofunctional in their reaction with isocyanates may 
be used in proportions of from 0.01 to 10% by weight, based on the 
polyurethane solids content, to serve as so-called chain terminating 
agents. Examples of such monofunctional compounds include monoamines such 
as butylamine and dibutylamine, octylamine, stearylamine, 
N-methyl-stearylamine, pyrrolidine, piperidine and cyclohexylamine, and 
monohydric alcohols such as butanol, 2-ethylhexanol, octanol, dodecanol 
and various amyl alcohols, cyclohexanol and ethylene glycol 
monoethylether. 
The polypols with molecular weights of up to 399 used for the purpose 
according to the invention may also be ester diols corresponding to the 
general formulae 
##STR1## 
wherein R denotes an alkylene group having 1 to 20, preferably 2 to 6 
carbon atoms or a cycloalkylene or arylene group with 6 to 10 carbon atoms 
x denotes a number from 2 to 6 and 
y denotes a number from 3 to 5 
e.g. .delta.-hydroxybutyl-.epsilon.-hydroxy-caproic acid ester, 
.omega.-hydroxyhexyl-.gamma.-hydroxybutyric acid ester, adipic 
acid-bis-(.beta.-hydroxyethyl)ester and terephthalic 
acid-bis-(.beta.-hydroxyethyl)ester; diolurethanes corresponding to the 
general formula 
EQU HO--(CH.sub.2).sub.x --O--CO--NH--R'--NH--CO--O--(CH.sub.2).sub.x --OH 
wherein 
R' denotes an alkylene group having 2 to 15, preferably 2 to 6 carbon atoms 
or a cycloalkylene or arylene group having 6 to 15 carbon atoms and 
x represents a number from 2 to 6, e.g. 
1,6-Hexamethylene-bis-(.beta.-hydroxyethylurethane) or 
4,4'-diphenylmethane-bis-(.delta.-hydroxybutylurethane); 
and diolureas corresponding to the general formula 
##STR2## 
wherein R" denotes an alkylene group having 2 to 15, preferably 2 to 9 
carbon atoms or a cycloalkylene or arylene group having 6 to 15 carbon 
atoms, 
R" denotes hydrogen or a methyl group and 
x represents the number 2 or 3, e.g. 
4,4'-diphenylmethane-bis-(.beta.-hydroxyethylurea) or the compound 
corresponding to the formula 
##STR3## 
For some purposes, it is advantageous to use polyols containing sulphonate 
and/or phosphonate groups (DE-OS No. 2 719 372), preferably the adduct of 
bisulphite with butane-1,4-diol or with its alkoxylation products. 
The isocyanate reactive compounds (b) are preferably short chained 
difunctional or trifunctional polyethers within the OH number range of 
from 300 to 800 or glycols such as butane-1,4-diol or ethylene glycol. 
Catalysts for the isocyanate addition reaction are used as component (c). 
One of these catalysts is preferably a tin compound, preferably a tin-II 
compound such as SnCl.sub.2, tin dioctoate or a tin-IV compound most 
preferably a diaryl or dialkyl tin-IV compound such as dimethyl tin 
dichloride, dimethyl tin sulphide and other dialkyl tin dihalides, dialkyl 
tin oxides or dialkyl tin sulphides, dialkyl tin-bis-(alkylmercaptides) 
such as dimethyl tin-bis-(butylmercaptide), dibutyl 
tin-bis-(octylmercaptide), dioctyl tin-bis-(laurylmercaptide), dimethyl 
tin-bis-(thioglycollic acid ethyl hexyl ester), dibutyl 
tin-bis-(thioglycollic acid dodecylester), dialkyl tin 
monochlorobutanolate and other dialkyl tin monohalogen-monoalcoholates and 
-phenolates, dialkyl tin-bis-alcoholates such as dimethyl 
tin-bis-octanolate or dibutyl tin-glycollate and the corresponding dialkyl 
tin-bis-(thioalcoholates). Dialkyl tin-IV-carboxylate compounds and 
dialkyl tinmonohalogen compounds such as dimethyl tin-chloro-octoate 
according to DE-OS No. 3 100 977 and stannoxane and thiostannoxane 
compounds having a tin-carboxylate structure according to DE-OS No. 3 141 
117 are particularly preferred, and especially di-C.sub.1 -C.sub.8 -alkyl 
tin-bis-(C.sub.1 -C.sub.4 -carboxylic acid-C.sub.1 -C.sub.24 -alkyl 
esters) such as dibutyl tin diacetate, dimethyl tin maleate, dibutyl tin 
dilaurate and dioctyl tin diacetate. 
Polyisocyanates containing at least 2, preferably 2 to 3 isocyanate groups 
may be used as component (d). 
The preparation of polyisocyanates containing isocyanurate groups and 
preferably having isocyanate contents of from 15 to 30% by weight has been 
described inter alia in DE-PS Nos. 1 022 789, 1 222 067 and 1 027 394 and 
in DE-OS Nos. 1 929 034 and 2 004 048. Polyisocyanates containing biuret 
groups have isocyanate contents of from 30 to 15% by weight, preferably 
from 25 to 20% by weight, and viscosities from 6000 to 500, preferably 
from 4000 to 1000 mPas at 20.degree. C. and have been described, for 
example, in DE-PS No. 1 101 394 and DE-OS No. 2 261 065. Polyisocyanates 
containing urethane groups may be prepared, for example, by reaction of 
the above mentioned aliphatic or cycloaliphatic diisocyanates, preferably 
hexamethylene diisocyanate or isophorone diisocyanate, with optionally 
substituted or modified alkanediols having 2 to 10, preferably 2 to 6 
carbon atoms in the alkylene group, such as ethylene oxide, 
butane-1,4-diol, dipropylene glycol, hexane-1,6-diol and neopentyl glycol 
as well as hydroxypivalic acid neopentyl glycol and mixtures thereof using 
a molar ratio of about 2:1. 
The equivalent ratio of isocyanate groups to isocyanate reactive groups, 
the so-called isocyanate index, may have a value from 70 to 130, 
preferably from 95 to 110, most preferably from 100 to 105 although the 
process could be carried out with an isocyanate index above 130, for 
example if trimerisation catalysts such as alkali metal acetates are used 
at the same time to trimerise the excess isocyanate groups with 
isocyanurate formation. 
By "isocyanate index" is meant in this context the ratio of NCO groups to 
all the isocyanate reactive groups present in the reaction mixture. An 
isocyanate index of 100 denotes in this connection the presence of 
equivalent quantities of isocyanate groups and isocyanate reactive groups. 
Particularly preferred are aliphatic polyisocyanates modified by uretdione 
groups, so-called "dimeric" isocyanates as described, for example, in 
DE-OS No. 1 670 720, DE-AS No. 3 030 513, DE-OS No. 3 227 779 or in 
Urethane Chemistry and Technology by Saunders/Frisch, Part I, page 61 et 
seq (1982) and/or aliphatic polyisocyanates containing isocyanurate 
groups, so-called "trimeric" isocyanates, and/or polyisocyanates 
containing oxadiazatrione groups obtainable e.g. according to U.S. Pat. 
No. 3 748 329. 
The isocyanate content of isocyanates suitable for the purpose of the 
invention is about 3 to 35, preferably 10 to 30, most preferably 15 to 25% 
by weight. 
The known auxiliary agents and additives used in polyurethane chemistry may 
be used as component (e) in the processes according to the invention. 
For example, blowing agents such as acetone, ethyl acetate and in 
particular halogenated alkanes such as dichloromethane, trichloromethane, 
monofluorotrichloromethane, chlorodifluoromethane or 
dichlorodifluoromethane may be used. Water may also be used. 
Other catalysts for the isocyanate polyaddition reaction may be used in 
addition to the preferred tin compounds if special purposes are to be 
achieved, e.g. tertiary amines such as N-ethyl-morpholine, 
N,N,N',N'-tetramethyl-ethylenediamine, pentamethyl-diethylenetriamine and 
higher homologues (DE-OS No. 2 624 527 and 2 624 528), 
1,4-diazabicyclo-(2,2,2)-octane, N-methyl-N'-dimethylaminoethylpiperazine, 
bis-(dimethylaminoalkyl)-piperazines (DE-OS No. 2 636 787), 
N,N-dimethyl-benzylamine, bis-(N,N-diethylaminoethyl)adipate, 
N,N,N',N'-tetramethyl-1,4-butanediamine, 
N,N-dimethyl-.beta.-phenylethylamine, 1,2-dimethylimidazole, 
2-methylimidazole and monocyclic and bicyclic amidines (DE-OS Nos. 1 720 
633, 2 722 514 and 2 439 550), aminoalkylethers according to DE-OS No. 3 
140 633 and EP-OS No. 54 219, ortho-carboxylic acid esters according to 
DE-OS No. 2 922 967, bis-(dialkylamino)alkyl ethers (U.S. Pat. No. 
3,330,782, DE-AS No. 1 030 558, DE-OS No. 1 804 361 and 2 618 280) and 
tertiary amines containing amide groups (preferably formamide groups) 
according to DE-OS No. 2 523 633 and 2 732 292. The known Mannich bases of 
secondary amines such as dimethylamine and aldehydes, preferably 
formaldehyde, or ketones such as acetone, methyl ethyl ketone or 
cyclohexanone and phenols such as phenol, nonylphenol or bisphenol may 
also be used as catalysts. 
Examples of tertiary amines containing isocyanate reactive hydrogen atoms 
suitable for use as catalysts include triethanolamine, 
triisopropanolamine, N-methyldiethanolamine, N-ethyl-diethanolamine, 
N,N-dimethylethanolamine and their reaction products with alkylene oxides 
such as propylene oxide and/or ethylene oxide as well as 
secondary-tertiary amines according to DE-OS No. 2 732 292. 
Silamines having carbon-silicon bonds may also be used as catalysts, e.g. 
the compounds described in DE-PS No. 1 229 290, e.g. 
2,2,4-trimethyl-2-silamorpholine and 
1,3-diethylaminomethyl-tetramethyl-disiloxane. 
Nitrogen-containing bases such as tetraalkylammonium hydroxides, alkali 
metal hydroxides such as sodium hydroxide, alkali metal phenolates such as 
sodium phenolate and alkali metal alcoholates such as sodium methylate may 
also be used as catalysts. Hexahydrotriazines (DE-OS No. 1 769 043) and 
carboxylates, e.g. according to EP-OS No. 7 440 and EP-OS No. 56 158 are 
also suitable catalysts. 
The following may be used as cocatalysts: Bismuth catalysts according to 
DE-OS No. 3 008 811 and U.S. Pat. No. 3,407,153, lead compounds according 
to DE-OS No. 2 710 901 and U.S. Pat. No. 3,474,075, antimony compounds 
e.g. according to U.S. Pat. No. 3,245,958, U.S. Pat. No. 3,245,957, U.S. 
Pat. No. 3,620,985, U.S. Pat. No. 3,109,853, U.S. Pat. No. 3,407,153, and 
U.S. Pat. No. 3,876,567, zinc salts, e.g. according to GB-PS No. 980,139, 
zirconium salts, e.g. according to U.S. Pat. No. 4,312,971, mercury 
compounds, e.g. according to U.S. Pat. No. 4,312,971, DE-OS No. 2 021 757 
and DE-AS No. 1 520 305, and compounds of other metals such as Co, Ni, Fe, 
V, Mo, Ti, Wo and B, e.g. according to EP-OS No. 59 632, U.S. Pat. No. 
3,808,162 and FR-PS No. 2 301 554. 
The reaction between isocyanate groups and Zerewitin-off-active hydrogen 
atoms is also highly accelerated by lactams and azalactams with the 
initial formation of an association between the lactam and the compound 
containing acidic hydrogen. Such associations and their catalytic action 
are described in DE-OS Nos. 2 062 286, 2 062 289, 2 117 576, 2 129 198, 2 
330 175 and 2 330 211. 
All the catalysts mentioned above may, of course, be used as mixtures. 
Combinations of organic metal compounds with amidines, aminopyridines or 
hydrazinopyridines are of particular interest (DE-OS Nos. 2 434 185, 2 601 
082 and 2 603 834). 
Other examples of catalysts and details concerning the activity of the 
catalysts are described in Kunststoff-Handbuch, Volume VII, published by 
Vieweg and Hochtlen, Carl-Hanser-Verlag, Munich 1966, e.g. on pages 96 to 
102. 
The catalysts are generally used in a quantity of about 0.001 to 10% by 
weight, based on the total quantity of compounds containing at least two 
isocyanate reactive hydrogen atoms. 
The compositions according to the invention may also contain surface active 
additives, internal mould release agents, UV stabilizers, 
thermostabilizers, antiozonates and antioxidants. 
Examples of auxiliary agents and additives optionally used according to the 
invention, i.e. of surface-active additives and foam stabilizers, 
flame-retarding substances, plasticizers, inorganic and organic dyes, 
pigments and fillers, and fungistatic and bacteriostatic substances and 
details concerning the use and mode of action of these additives are given 
in Kunststoff-Handbuch, Volume VII, published by Vieweg and Hochtlen, 
Carl-Hanser-Verlag, Munich 1966, e.g. on pages 103-113. 
External and internal mould release agents known per se may also be used in 
the process according to the invention, the "external mould release 
agents" being mainly waxes or metal soaps whereas the "internal mould 
release agents" used may be those described in U.S. Pat. No. 3,726,952, 
GB-PS No. 1 365 215, DE-OS No. 2 356 692, DE-OS No. 2 363 452, DE-OS No. 
2 404 310, DE-OS No. 2 427 273, DE-OS No. 2 431 968 and GB-PS No. 1 420 
293. 
In the process according to the invention, the components are reacted 
together by the known one-shot process, the prepolymer process or the 
so-called semi-prepolymer process, in many cases using mechanical devices 
such as those described in U.S. Pat. No. 2,764,565. Details concerning 
processing apparatus which are also suitable for the purpose of the 
invention are given in Kunststoff-Handbuch, Volume VII, published by 
Vieweg and Hochtien, Carl-Hanser-Verlag, Munich 1966, e.g. on pages 121 to 
205. 
The coating compound according to the invention may be worked up to form 
solid or cellular foam structures. If foams with a density below about 1 
g/cm.sup.3 are to be produced, the process according to the invention is 
carried out in closed moulds, using so-called blowing agents. The reaction 
mixture is introduced into a mould which may be made of a metal such as 
aluminium or a synthetic resin, e.g. an epoxide resin. The reaction 
mixture foams up inside the mould to form the moulded article. In the 
process according to the invention, the foamable reaction mixture is 
generally introduced into the mould in such a quantity that if left to 
foam freely it would expand to a volume which is greater than the internal 
volume of the mould and preferably amounts to 120 to 1000% of the volume 
of the mould. This procedure is known as "overcharging" which has been 
disclosed, for example, in U.S. Pat. No. 3,178,490 and in U.S. Pat. No. 
3,182,104. 
The process may be used to produce flexible, semi-rigid or rigid moulded 
foams with a dense outer skin, cellular core and integral density 
distribution, that is to say a continuous increase in density from the 
centre of the moulded product to the outside. The rigidity of the products 
obtained by the process according to the invention depends primarily on 
the functionality and chain length of the starting materials used for the 
process according to the invention, i.e. the degree of branching of the 
starting materials. The process according to the invention is preferably 
used for the production of rigid moulded foams. 
Rigid products obtained by the process may be used for the manufacture of 
furniture parts, car body parts, technical apparatus and instruments and 
structural elements, and semi-rigid to flexible products may be used for 
the manufacture of safety cushioning in the construction of motor 
vehicles, elastic shoe soles, car bumpers, etc. 
The preferred use of the reactive masses according to the invention, 
however, is that of mechanically edging wooden panels with foamed or 
preferably solid edgings or borders for the furniture industry. Processing 
may suitably be carried out by mixing the isocyanate component (containing 
iosocyanate compound and optionally auxiliary agents and additives) and 
the polyol component (containing polyol and cross-linking component, 
preferably the catalyst and optionally auxiliary agents and additives) 
mechanically by means of a two-component mixing head and discharging the 
mixture into a heated mould. 
A so-called "open process" may be employed, in which case the furniture 
part (table-top, part of drawer, etc.) which is to be covered round the 
edge is placed with its undersurface facing upwards into a horizontal 
aluminium mould heated to 50.degree. to 70.degree. C. and fixed in the 
mould, and the space left in the mould is filled with reactive mass which 
is left to harden. 
In the "closed process", the panel which is to be coated is also inserted 
and fixed in a mould but the mould cavity with the part inserted therein 
is then closed with a suitable lid and substantially sealed off. Reactive 
coating material can then be forced under pressure into the completely 
closed gap between the wall of the mould and the inserted panel. 
The moulding compounds may be transported and injected by means of low 
pressure machines capable of operating with open and closed moulds. The 
conveyor devices may be, for example, gear wheel pumps or immersion piston 
pumps of the usual construction. Static mixers suffice as mixing devices. 
The temperature of the components is generally in the region of 15.degree. 
to 40.degree. C., preferably 20.degree. to 25.degree. C., and the 
temperature of the mould is generally 40.degree. to 70.degree. C., 
preferably 50.degree. to 60.degree. C. The time required for filling the 
mould is generally 1 to 3 minutes. When the reaction systems according to 
the invention are used, the product can be removed from the mould 
generally 3 to 5 minutes after the filling process has been completed. 
The high pressure machines may be mixing and conveyor installations 
equipped with a suitable mixing head and having conveyor devices equipped 
with (stroke) piston pumps. The temperature of the components is generally 
15.degree. to 45.degree. C., preferably 25.degree. to 35.degree. C., and 
the temperature of the mould is generally 40.degree. to 80.degree. C., 
preferably 50.degree. to 60.degree. C. The product can be removed from the 
mould 3 to 5 minutes after completion of the filling process. 
Cured coatings produced from the masses according to the invention are 
lightfast and resistant to moisture and temperature (assuming normal use 
and environmental conditions). They are resistant to solvents and 
chemicals. They adhere extremely firmly and closely not only to the 
surface of any form of edge on wooden material but also to surfaces, if 
necessary pretreated, of other materials, e.g. plastics or synthetic 
resins, of any dimensions. 
GENERAL EXPERIMENTAL CONDITIONS 
The polyol component and the polyisocyanate component are prepared 
separately by mixing the individual components mentioned in the 
experimental examples and if necessary degasified at 200 mm Hg. After they 
have been adjusted to a temperature of 30.degree. C., the polyol component 
and polyisocyanate component are introduced within about 10 to 20 seconds 
by means of a high pressure piston pump, e.g. HK 135 of Hennecke, in the 
given proportions (always maintaining an isocyanate index of 106, i.e. 
equivalents NCO:OH=1.06:1) into a closed mould adjusted to about 
50.degree. to 60.degree. C. in which the wooden part which is to be 
covered on its edges has already been placed in the correct position. 
After expiry of the dwell time (2 to 3 minutes unless otherwise 
indicated), the wooden part with the edging cast on it can be removed from 
the mould. 
The mechanical properties determined for a particular system on separately 
prepared test samples are indicated in some experimental examples. 
Polyol component I 
Trifunctional polyether obtained by the addition of 86.5% by weight of 
propylene oxide and 13.5% by weight of ethylene oxide to 
trimethylolpropane; OH number 35, molecular weight 4800. 
Polyol component II 
Difunctional polyether obtained by the addition of 87% by weight of 
propylene oxide and 13% by weight of ethylene oxide to propylene glycol; 
OH number 28, molecular weight 4000. 
Polyol component III 
Transesterification product of castor oil and a condensation product of 
cyclohexanone and formaldehyde; OH number about 165. 
Polyol component IV 
50% Paste of a zeolite having a nominal pore size of 4 .ANG.in castor oil. 
Polyol component V 
ZnO paste in a polyether polyol, OH number 17. 
Polyol component VI 
33% Solution of triethylene diamine in dipropylene glycol. 
Polyol component VII 
Castor oil, OH number 160. 
Polyol component VIII 
Trifunctional polyether obtained by the addition of propylene oxide to 
trimethylolpropane, OH number 370. 
Polyol component IX 
Polymer polyol prepared by grafting 80 parts by weight of a trifunctional 
polyether with OH number 35 (obtained by the addition of 83% by weight of 
propylene oxide and 17% by weight of ethylene oxide to trimethylolpropane) 
with 20 parts by weight of a monomer mixture of 60% by weight of 
acrylonitrile and 40% by weight of styrene. 
Polyol component X 
Polyester of adipic acid and butane-1,4-diol/ethylene glycol in proportions 
by weight of 1.44:1; OH number 55. 
Polyisocyanate component I 
Semiprepolymer of isophorone diisocyanate and a propoxylation product of 
trimethylolpropane with OH number 550; 33% by weight NCO. 
Polyisocyanate component II 
Semiprepolymer of isophorone diisocyanate and an adduct of glycerol and 
propylene oxide, OH number 670; 29.0 to 29.3% by weight NCO. 
Polyisocyanate component III 
Trimer based on hexamethylene diisocyanate with a high proportion of 
hexamethylene diisocyanate-uretdione, about 22% by weight NCO. 
Polyisocyanate component IV 
Aliphatic, heterocyclic diisocyanate obtained by the reaction of 2 mol of 
hexamethylene diisocyanate with 1 mol of CO.sub.2, about 22% by weight 
NCO. 
Polyisocyanate component V 
Prepolymer of 2 mol of hexamethylene diisocyanate and 1 mol of dipropylene 
glycol, 14.0% by weight NCO.

EXAMPLE 1 
______________________________________ 
Polyol: 45.75 parts by weight of polyol component I 
47.75 parts by weight of polyol component II 
8.50 parts by weight of butane-1,4-diol 
5.00 parts by weight of polyol component IV 
4.00 parts by weight of polyol component V 
Polyiso- Mixture of polyisocyanate components 
cyanate: II and IV in proportions by weight in the 
range of 3:1 to 1:3 
Catalysis: 
0.9% by weight of dibutyl tin diacetate 
in the polyol 
Processing: 
100 parts by weight of polyol + polyisocyanate 
corresponding to an isocyanate index of 
106 (equivalent ratio NCO:OH groups = 1.06:1) 
Result: Very slight gas formation, short dwell 
time in the mould. 
______________________________________ 
EXAMPLE 2 
______________________________________ 
Polyol: See Example 1 
Polyiso- Polyisocyanate component II 
cyanate: 
Catalysis: (a) 0.6% by weight of dibutyl tin dilaurate 
in the polyisocyanate 
(b) 0.7% by weight of diazabicycloundecene 
in the polyol and 0.6% by weight of 
dibutyl tin dilaurate in the polyiso- 
cyanate 
Processing: 
100 Parts by weight of polyol + 37.5 parts 
by weight of polyisocyanate (corresponding 
to index 106) 
Results: (a) Firm adherence to chipboard panels, 
slight gas formation 
(b) More vigorous gas formation, removable 
from the mould after 5 minutes 
______________________________________ 
Technical data: 
DIN 53 505 Shore hardness A 
65 
DIN 53 455 Tensile strength (MPa) 
4.3 
DIN 53 455 Loading at 100% elongation (MPa) 
2.6 
DIN 53 455 Elongation at break (%) 
200 
DIN 53 515 Tear propagation resistance (N/mm) 
10.5 
DIN 53 516 Abrasion (mm.sup.3) 
380 
DIN 53 516 Density 20.degree. C. (g/cm.sup.3) 
1.05 
DIN 53 517 Pressure deformation residue, 70.degree. C. 
10 
24 h, 25% D, (%) 
DIN 53 512 Elasticity (%) 33 
______________________________________ 
EXAMPLE 3 
______________________________________ 
Polyol: see Example 1 
Polyiso- Polyisocyanate component I 
cyanate: 
Catalysis: (a) 0.6% by weight of dibutyl tin dilaurate 
in the polyisocyanate 
(b) 0.7% by weight of diazabicycloundecene 
in the polyol and 0.6% by weight of 
dibutyl tin dilaurate in the polyisocyanate 
Processing: 
100 parts by weight of polyol + 33 parts 
by weight of polyisocyanate (corresponds 
to isocyanate index 106) 
Results: (a) Firm adherence to chipboard panels, 
no gas formation at the panel, dwell 
time in the mould more than 20 minutes 
(b) gas formation on the chipboard panel, 
removable from the mould after 5 minutes 
Technical data: 
Shore hardness A 58 
Tensile strength (MPa) 4.2 
Loading at 100% elongation (MPa) 
1.9 
Elongation at break (%) 
270 
Tear propagation resistance (N/mm) 
10.4 
Abrasion (mm.sup.3) 380 
Density 20.degree. C. (g/cm.sup.3) 
1.05 
Pressure deformation residue, 70.degree. C., 
12 
24 h, 25% D, (%) 
Elasticity (%) 36 
______________________________________ 
EXAMPLE 4 
______________________________________ 
Polyol: 90 parts by weight of polyol component VII 
10 parts by weight of polyol component VIII 
4 parts by weight of polyol component V 
5 parts by weight of polyol component IV 
Polyiso- 
25 parts by weight of polyisocyanate component IV 
cyanate: 
75 parts by weight of polyisocyanate component III 
Catalysis: 
0.8% by weight of dibutyl tin diacetate in the polyol 
Processing: 
corresponding to isocyanate index 106 
Results: 
Slight gas formation on the chipboard 
panel, medium dwell time in the mould 
______________________________________ 
EXAMPLE 5 
______________________________________ 
Polyol: see Example 4 
Polyiso- 
Polyisocyanate component I 
cyanate: 
Catalysis: 
0.9% by weight of dibutyl tin diacetate in the polyol 
Processing: 
corresponding to isocyanate index 106 
Results: 
Slight gas formation, medium dwell time 
of 10 to 12 minutes in the mould. 
______________________________________ 
EXAMPLE 6 
______________________________________ 
Polyol: 95.0 parts by weight of polyol component III 
5.0 parts by weight of butane-1,4-diol 
5.0 parts by weight of polyol component IV 
4.0 parts by weight of polyol component V 
0.6 parts by weight of dibutyl tin 
diacetate 
Polyisocyanate: 
see Example 4 
Processing: 
100 parts by weight of polyol + 
71 parts by weight of polyisocyanate 
Results: No foam formation, brief dwell 
time in the mould 
______________________________________ 
Technical data: 
Shore hardness A 68 
Shore hardness D 20 
Lightfastness grade 7 
Tensile strength (MPa) 3.8 
Loading at 100% elongation (MPa) 
3.3 
Elongation at break (%) 
150 
Density 20.degree. C. (g/cm.sup.3) 
1.09 
Elasticity (%) 5 
Tear propagation resistance (N/mm) 
7.3 
______________________________________ 
EXAMPLE 7 
______________________________________ 
Polyol: 95.0 parts by weight of polyol component III 
5.0 parts by weight of butane-1,4-diol 
5.0 parts by weight of polyol component IV 
4.0 parts by weight of polyol component V 
Polyiso- 
Polyisocyanate component V 
cyanate: 
Catalysis: 
0.8% by weight of dibutyl tin diacetate in the polyol 
Processing: 
Isocyanate index 106 
Results: 
Slight gas formation at the chipboard 
panel, medium dwell time in the mould 
of about 10 minutes 
______________________________________ 
EXAMPLE 8 
______________________________________ 
Polyol: see Example 7 
Polyiso- Polyisocyanate component I 
cyanate: 
Catalysis: 0.8% by weight of dibutyl tin diacetate 
in the polyol 
Processing: 
Isocyanate index 106 
Results: Slight gas formation on the chipboard panel, 
long dwell time in the mould, above 15 min. 
______________________________________ 
EXAMPLE 9 
______________________________________ 
Polyol: 46.0 parts by weight of polyol component IX 
46.0 parts by weight of polyol component II 
8.0 parts by weight of butane-1,4-diol 
5.0 parts by weight of polyol component IV 
4.0 parts by weight of polyol component V 
Polyiso- 
see Example 4 
cyanate: 
Catalysis: 
0.8% by weight of dibutyl tin diacetate in the polyol 
Processing: 
corresponding to an isocyanate index of 106 
Results: 
very slight foaming, medium dwell time 
in the mould of 10 minutes 
______________________________________ 
EXAMPLE 10 
______________________________________ 
Polyol: 95 parts by weight of polyol component X 
5 parts by weight of ethylene glycol 
4 parts by weight of polyol component V 
5 parts by weight of polyol component IV 
Polyiso- 
see Example 4 
cyanate: 
Catalysis: 
0.9% by weight of dibutyl tin diacetate in the polyol 
Processing: 
corresponding to an isocyanate index of 106 
Results: 
slight gas formation, medium dwell time 
in the mould, 10 to 12 minutes. 
______________________________________