Patent GB-924111-A (GB)
Title: Process for the manufacture of foamed polyurethanes
Inventor: CHAPMAN JOHN FREDERICK
IPC: C08G18/50
Filed: 1958-08-15
Abstract: A process for the manufacture of foamed polyurethane materials by the interaction of an organic polyisocyanate, a hydroxy-containing polyether and water, is characterized in that the polyether, in addition to containing two or more hydroxyl groups, also contains at least one tertiary amino group.  Suitable polyethers are those obtained by reacting alkylene oxides.  The polyurethanes can be applied by spraying techniques in the form of coatings with ammonia or compounds containing at least one primary or at least two secondary amino groups.  The polyethers may be used in admixture with polyethers or polyesters not containing tertiary amino groups.  As additional ingredients of the foamforming reaction mixture are specified pigments, fillers, flame-retarders such as tri-(b -chloroethyl) phosphate, extenders such as tricresyl phosphate, and structure modifiers and emulsifiers such as soaps or ethylene oxide condensates.  Di- and triisocyanates are listed.  Preferred is the product obtained by phosgenating the polyamines resulting from the condensation of aldehydes with aromatic amines.  A tertiary amine may also be added to the reaction mixture as additional catalyst.  In Example (1) a foamed product is obtained using a twin-feed spray gun, from a mixture of triethanolamine/propylene oxide reaction product, water, tri-(b -chlorethyl) phosphate and a condensation product of mixed cetyl/oleyl alcohols and ethylene oxide, and a polyisocyanate composition from crude diaminodiphenyl methane. The mixture is sprayed on to vertical panels to give a film which reacts in 3 to 4 seconds to form a layer of rigid foam about half an inch thick. Other examples employ as polyether (2) a mixture of a propylene oxide/trimethylol propane condensate and a reaction product ("polyether B") of propylene oxide with tetrakis(b -hydroxyethyl)-ethylene-diamine; (3) to (5) "polyether B" alone; (6) an addition product of ethylene diamine with ethylene and propylene oxides; (7) triethanolamine/ethylene oxide reaction product; (9) triisopropanolamine/ethylene oxide reaction product; (10) triisopropanolamine /propylene oxide reaction product; (11) a reaction product from hepta-bis-hydroxypropyl tetraethylene pentamine and propylene oxide.  Specification 848,965 is referred to.ALSO:A process for the manufacture of foamed polyurethane materials by the interaction of an organic polyisocyanate, a hydroxy-containing polyether and water, is characterized in that the polyether, in addition to containing two or more hydroxyl groups, also contains at least one tertiary amino group.  Suitable polyethers are those obtained by reacting alkylene oxides with ammonia or compounds containing at least one primary or at least two secondary amino groups.  Preferred are reaction products with ammonia (or alkanolamines may be used as intermediates), piperazine and amino compounds of the formula H2N[R-NH]nR-NH2 wherein R represents hydrocarbon groups and n is a whole number having a value of 0 to 5. Specific amino compounds mentioned are methylamine, cyclohexylamine, piperazine, benzylamine, phenylethylamine, di(amino ethyl or methyl) benzene, ethylene diamine, hexamethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and bis(o -aminohexyl) amine and 2-amino-2-(hydroxymethyl) propanediol-1:3. For each reactive aminohydrogen 2 to 40 molecular proportions of alkylene oxide are preferably employed.  The polyethers may be used in admixture with polyethers or polyesters not containing tertiary amino groups.  As additional ingredients of the foam-forming reaction mixture are specified pigments, fillers, flame-retarders such as tri-(b -chloroethyl) phosphate, extenders such as tricresyl phosphate, and structure modifiers and emulsifiers such as soaps or ethylene oxide condensates.  Di- and triisocyanates are listed. Preferred is the product obtained by phosgenating the polyamines resulting from the condensation of aldehydes with aromatic amines. A tertiary amine may also be added to the reaction mixture as additional catalyst.  In Example (1) a foamed product is obtained, using a twin-feed spray gun, from a mixture of triethanolamine/propylene oxide reaction product, water, tri-(b -chlorethyl) phosphate, and a condensation product of mixed cetyl/oleyl alcohols and ethylene oxide, and a polyisocyanate composition from crude diaminodiphenyl methane.  Other examples employ as polyether (2) a mixture of a propylene oxide/trimethylol propane condensate and a reaction product ("polyether B") of propylene oxide with tetrabis-(b -hydroxyethyl)-ethylene-diamine; (3) to (5) polyether B alone; (6) an addition product of ethylene diamine with ethylene and propylene oxides; (7) triethanolamine/ethylene oxide reaction product; (9) triisopropanolamine/ethylene oxide reaction product; (10) triisopropanolamine/propylene oxide reaction product; (11) a reaction product from hepta-bishydroxypropyl tetraethylene pentamine and propylene oxide.  Specification 848,965 is referred to.ALSO:A process for the manufacture of foamed polyurethane materials by the interaction of an organic polyisocyanate, a hydroxy-containing polyether and water, is characterised in that the polyether, in addition to containing two or more hydroxyl groups, also contains at least one tertiary amino group.  Suitable polyethers are those obtained by reacting alkylene oxides with ammonia or compounds containing at least one primary or at least two secondary amino groups.  Preferred are reaction products with ammonia (or alkanol-amines may be used as intermediates), piperazine and amino compounds of the formula H2N[R-NH]nR-NH2 wherein R represents hydrocarbon groups and n is a whole number having a value of 0 to 5.  Specific amino compounds mentioned are methylamine, cyclohexylamine, piperazine, benzylamine, phenylethylamine, di (aminoethyl/or methyl) benzene, ethylene diamine, hexamethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and bis-(o -amino-hexyl)amine and 2-amino-2-(hydroxymethyl) propanediol-1 : 3.  For each reactive amino-hydrogen 2 to 40 molecular proportions of alkylene oxide are preferably employed.  The polyethers may be used in admixture with polyethers or polyesters not containing tertiary amino groups.  As additional ingredients of the foam-forming reaction mixture are specified pigments, fillers, flameretarders such as tri-(b -chloroethyl) phosphate, extenders such as tricresyl phosphate, and structure modifiers and emulsifiers such as soaps or ethylene oxide condensates.  Di- and triisocyanates are listed. Preferred is the product obtained by phosgenating the polyamines resulting from the condensation of aldehydes with aromatic amines. A tertiary amine may also be added to the reaction mixture as additional catalyst.  In Example (1) a foamed product is obtained using a twin-feed spray gun, from a mixture of triethanolamine/propylene oxide reaction product, water, tri-(b -chlorethyl) phosphate and a condensation product of mixed cetyl/oleyl alcohols and ethylene oxide, and a polyisocyanate composition from crude diamino-diphenyl methane.  Other examples employ as polyether (2) a mixture of a propylene oxide/trimethylol propane condensate and a reaction product ("polyether B") of propylene oxide with tetrakis (b -hydroxyethyl)-ethylene-diamine; (3) to (5) "polyether B" alone; (6) an addition product of ethylene diamine with ethylene and propylene oxides; (7) triethanolamine/ethylene oxide reaction product; (9) triisopropanolamine/ethylene oxide reaction product; (10) triisopropanolamine/propylene oxide reaction product; (11) a reaction product from heptabis-hydroxypropyl tetraethylene pentamine and propylene oxide.  Specification 848,965 is referred to.