baber/WOPTO huggingface dataset:
Patent GB-1373535-A (GB)
Title: Arylpyrimidines-inhibitors of platelet aggregation and broncho dilators
IPC: C07D239/42
Filed: 1971-10-04
Abstract: 1373535 4-Amino-6-aryl-pyrimidines PFIZER Inc 4 Oct 1971 [5 Oct 1970] 46158/71 Heading C2C 4-Amino-6-aryl-pyrimidines of the general formula wherein Ar is a phenyl group optionally substituted by a methyl, methoxy, hydroxy, trifluoromethyl, carboxy, cyano, nitro, di-C 1-3  alkylamino, amino or C 1-4  acylamino group, by a fluorine, chlorine or bromine atom, or by 3- and 4-methoxy broups, or by 3-ethoxy and 4- methoxy groups; a pyridyl, thienyl or furyl group optionally mono C 1-4  acylamino substituted; or a naphthyl, 2- or 3-indolyl, 2- or 3- benzothienyl or 2- or 3-benzofuryl group; each of R 1  and R 2  is a hydrogen atom or a C 1-4  alkyl, C 3-7  cycloalkyl, 2-dimethylaminoethyl, 2-hydroxyethyl, 2,2,2-trifluoroethyl, C 3-4  alkenyl or pyridyl-methyl group or a phenyl group 2- substituted by a carboxy or sulphamoyl group, or R 1 R 2 N is a group of the formula wherein Z is CH 2 , O, S, or N-C 1-3  alkyl and each of n and m is 2 or 3; and R 3  is a hydrogen atom or C 1-3  alkyl group, which are novel except when R 1 , R 2  and R 3  are each a hydrogen atom and Ar is a phenylgroup; and acid addition salts thereof are prepared (a) by reaction of the corresponding 4-chloro-6-aryl-pyrimidine with an amine of the general formula R 1 R 2 NH; and (b) when Ar is an optionally substituted phenyl group and R 3  is a hydrogen atom, by reaction of the corresponding 4 - aminobenzothieno - [3,2 - d]pyrimidine with Raney nickel; followed optionally by salification of the product. 4-Chloro - 5 - R 3  - 6 - Ar - pyrimidines are prepared by reaction of a 4-hydroxy-5-R 3 -6-Arpyrimidine with phosphorus oxychloride. 4- Hydroxy-6-phenyl-pyrimidine is prepared by reacting ethyl cyanoacetate with phenyl magnesium bromide in ether and hydrolysing the resulting complex with an acid, and treating the resulting ethyl 3-aminocinnamate with formamide in the presence of an alkali metal alkoxide. 4-R 1 R 2 N-Benzothieno-[3,2-d]pyrimidines are prepared by reaction of an o-chlorobenzonitrile with NaSCH 2 CO 2 CH 3 , reaction of the resulting 2- methoxy-carbonyl-3-amino-benzothiophene with formamide in the presence of an alkali metal alkoxide, treatment of the resulting 4-hydroxybenzothieno-[3,2-d]pyrimidine with phosphorus oxychloride and reaction of the resulting 4- 4-chlorobenzothieno-[3,2-d]pyrimidine with an amine of the general formula R 1 R 2 NH.
Patent GB-1147058-A (GB)
Title: A method for preparing electrolytic capacitors
Inventor: VARGHA KALMAN
IPC: H01G9/00
Filed: 1966-10-17
Abstract: 1,147,058. Electrolytic capacitors. TAVKOZLESI KUTATO INTEZET. 17 Oct., 1966, No 46344/66. Heading H1M. An oxide film is formed on a valve metal foil by anodizing, using an aqueous solution containing solute selected from the phosphates or hydrogen phosphates of ammonium or alkali metals, or mixtures thereof, at a current density of 1 to 15 mA/cm.<SP>3</SP> and after constructing an electrolytic capacitor using the anodized foil, reformation is carried out using the working electrolyte which contains quaternary ammonium salts of the half esters formed from dicarboxylic acids and/or hydroxydicarboxylic acids and dihydric alcohols. Preferably anodizing takes place at 2‹ to 98‹ C. using a phosphate concentration of 0À5 to 10 g./litre at a pH of 4 to 8. The working electrolyte preferably contains the salt formed from ethanolamine and the half esters of tartaric, succinic or adipic acids and ethylene glycol.
Patent GB-1168251-A (GB)
Title: A Bed
Inventor: WORT RICHARD
IPC: A47C21/04
Filed: 1965-11-02
Abstract: 1,168,251. Beds. R. WORT. 28 Oct., 1966 [2 Nov., 1965], No. 46352/65. Heading A4J. A bed comprises a box-like container 2 holding a mattress 3, and a canopy 9 which forms with the container a chamber in which the body of the user from the neck down is contained, and a heater for causing air to flow by convection through the chamber. The canopy is connected by air tight joints either at all four edges to the container and as provided with a neck hole or at only three edges and has a flap which fits freely over the neck of the user. The heater comprises a light bulb 6, or an electric heating element or an element connected to a domestic hot water supply and is contained in a box 7 having an air inlet 8. The heater is controlled by a thermostat. The air is delivered to the canopy 9 by a duct 5 or through a perforated duct. The air escapes through gaps around the neck opening, through air vents or through the weave of the canopy.
Patent GB-1198506-A (GB)
Title: Method and Apparatus for Sharpening Cutting Tool Edges
Inventor: ATWATER ROBERT MUNROE
IPC: B24B3/48
Filed: 1967-10-13
Abstract: 1,198,506. Razor blades. GILLETTE CO. 13 Oct., 1967 [14 Oct., 1966], No. 46739/67. Heading B4B. [Also in Division B3] A razor blade has its edge sharpened (Division B3) to form convex facet surfaces 36 in which the included angle of the facets decreases as the distance from the tip of the edge increases.
Patent GB-1325466-A (GB)
Title: Protection of apparatus containing two exothermically inter- reactive media
IPC: F28F19/00
Filed: 1970-10-02
Abstract: 1325466 Protection of apparatus containing two exothermically inter-reactive media; tubular heat exchangers INTERATOM INTERNATIONALE ATOMREAKTORBAU GmbH 2 Oct 1970 [4 Oct 1969] 47067/70 Headings F4A and F4S A chamber containing a first medium has tubes for a second higher pressure medium passing through it, the two media being exothermically intereaetive, e.g. water/steam tubes flowing through liquid sodium in a nuclear reactor heat exchanger, and baffle means 8 is placed between tube 1 and an adjacent section 2 of the chamber wall, defining a compartment opening towards the tube, so that in the event of a break 3 the baffle 8 diverts the area of reaction along path 4 away from the wall sweeping the compartment free of sodium. Various types of baffle means may be used i.e. baffles extending normally to the wall surface attached either directly to the wall or, (Fig. 1, not shown), to an intermediate panel extending parallel to the wall.
Patent GB-956113-A (GB)
Title: Improvements in or relating to hearing aids
IPC: H04R25/02
Filed: 1962-12-13
Abstract: 956,113. Deaf aid sets. PHILIPS ELECTRICAL INDUSTRIES Ltd. Dec. 13, 1962 [Dec. 16, 1961], No. 47131/62. Heading H4J. [Also in Division H2] A hearing aid of the type to be carried behind the ear comprises a bipartite housing containing a chassis plate 31, Fig. 3, carrying a nicrophone 3, amplifier 5, and a battery housing 9, the battery housing also carries a telephone receiver 13 and a volume control 7. The battery 11 of the hearing aid is enclosed in an insulating cupshaped casing having an aperture off-centre of the bottom of the cup and the aid is switched on by rotating the battery casing 49, the edge of which projects through an opening in the casing as shown in Fig. 1, until a contact spring attached to the chassis plate 31 makes contact with the battery through the aperture in the casing 49, the other connection to the battery being maintained by tag 53 pressed out from the housing 9. A listening coil may be provided for use with a telephone in which case a switch 39 (see Division H2) is attached to the battery housing to change over connections from the microphone to the listening coil. Acoustic connection to the microphone and receiver is by tube 29 and 25, respectively. The volume control and switch 39 are attached to the battery housing by double sided adhesive tape, and the two halves of the instrument case are held together by a projection 19 and a screw 21.
Patent GB-1113797-A (GB)
Title: Buffer
IPC: B66C7/16
Filed: 1965-11-10
Abstract: 1,113,797. Crane bridge buffers. BETEILIGUNGS - UND PATENT VERWALTUNGS G.m.b.H. 10 Nov., 1965 [11 Nov., 1964], No. 47750/65. Heading B7T. [Also in Division F2] A crane bridge has buffers, each including an elastic body formed exclusively of cellular foamed plastics with gases occluded in the uniformly-distributed cells, which have a diameter of 0À5-10 mm. The body 7 is surrounded by a plastics skin and provided with a mounting flange. The bridge crane comprises a girder 2 mounted on wheels running on a runway and horizontally guided by further wheels and having buffers engageable with fixed counter-buffers. A crab 1 travels along the girder 2.
Patent GB-1121657-A (GB)
Title: Improvements in and relating to continuous sludge dewatering plant
Inventor: BERGER OTTO
IPC: C02F11/126
Filed: 1964-11-26
Abstract: 1,121,657. Filtering plant. DAVEY PAXMAN & CO. Ltd. 18 Nov., 1965 [26 Nov., 1964], No. 48103/64. Heading B1D. In a sewage sludge treatment plant comprising two first stage and one second stage rotary filters 6, 7, each filter is fitted with a spray nozzle 5, and solenoid valve 2 is controlled by a timer 3 to deliver washing liquid at predetermined intervals. A second timer 11 may control a pump 9 which delivers the washing water from a tank 8. Tank 8 has a float-controlled inlet valve 13. heater 15 and means for adding detergent. The plant and washing circuit may be controlled by a level-sensing device in a sludge tank. The spraying may coniron compound, at least one element selected the filtering process, to prevent sludge drying on the filtering medium. Partly dried sludge passes from filters 6 to filter 7.
Patent GB-1138343-A (GB)
Title: Sensitized silver halide photographic emulsions
Inventor: GANDINO MARIO
Filed: 1965-11-12
Abstract: 1,138,343. Merocyanine dyes. FERRANIA S.p.A. 12 Nov., 1965 [25 Jan., 1965], No. 48153/65. Heading C4P. [Also in Division G2] The invention relates to dyes of the formula wherein R and R<SP>1</SP> are each chlorine or one is hydrogen and the other acyl or one is hydrogen and the other is aryl, R<SP>11</SP> is alkyl, acetoxy alkyl or N,N-dimethyl-amino alkyl, R<SP>111</SP> is alkyl, N,N-diethyl carbamoyl, methyl or aralkyl and R<SP>1111</SP> is alkyl.
Patent GB-1464719-A (GB)
Title: Mine roadway support struts
IPC: E21D11/28
Filed: 1974-11-21
Abstract: 1464719 Mine roof support struts SCHWARZ HOLYWELL Ltd 21 Nov 1974 [18 Oct 1973] 48704/73 Heading E1E A mine roof support strut comprises a tube 1 provided adjacent each end with a projection 7 which serves as an abutment for locating a helical coil 4 having a hook 5 adapted to engage the mine roof support 2, one end of each coil being bent through 90‹ for engagement with the associated projection.
Patent GB-1405324-A (GB)
Title: Highly reactive resin compositions which contain acrylamide- methylol-ethers and can be cured by uv-light
IPC: C08F2/00
Filed: 1973-10-19
Abstract: 1405324 Photocurable unsaturated polyester compositions BAYER AG 19 Oct 1973 [20 Oct 1972] 48788/73 Heading C3P Resin compositions which are curable by ultra-violet light contain (a) 10-90% by weight of an unsaturated polyester derived from one or more α,#-unsaturated dicarboxylic acids and containing #,γ-ethylenically unsaturated ether groupings, (b) 90-10% by weight of one or more alkyl, cycloalkyl, aralkyl or alkenyl ethers of N-methylol acrylamide or N-methylol methacrylamide, and (c) 0À3-10% by weight of a photoinitiator, all of the aforesaid percentages being based on the sum of components (a) and (b). The #,γ-unsaturated ether groupings of the polyester may be derived from an unsaturated hydroxy - ether such as trimethylolpropane mono- or di-allyl ether, glycerine mono- or diallyl ether, or pentaerythritol mono-, di- or triallyl ether. Exemplified unsaturated polyesters are derived from fumaric acid, 1,2-propylene glycol, diethylene glycol, trimethylolpropane diallyl ether and diethylene glycol mono-n-butyl ether. Illustrated as component (b) are N- methylolacrylamide allyl ether and N-methoxymethylmethacrylamide. The photoinitiator is preferably a halomethylated benzophenone, e.g. p-benzoylbenzal chloride. The curable compositions may optionally include such additives as fillers, pigments, UV absorbers, stabilizers, organic peroxides and compatible resins. Applications for the compositions include coating, printing ink and surface-filling compositions.
Patent GB-1503455-A (GB)
Title: Play rail amusement centre
IPC: A63H19/28
Filed: 1976-11-23
Abstract: 1503455 Toys TOMY KOGYO CO 1NC 23 Nov 1976 [27 Nov 1975] 48807/76 Heading A6S  A toy locomotive 12, Fig. 1, and wagon 14 run around a track 10, the wagon carrying a doll 21 having a freely rotatable ball 76, Fig. 7, in its base, until a sideways extending pin 73, Fig. 2, on the wagon runs up a ramp 72 (see also Fig. 4) on a track section 70, thus tilting the wagon sideways. The doll 21 then rolls sideways off the wagon 14 and down a chute 74 to the foot of a carrier wheel 16 on which are pivoted carriages 18 for dolls 21. Meanwhile, the locomotive 12, &c. continues round the track 10 until another sideways extending pin 78, Fig. 3, on the wagon engages a flange 80 on a structure supporting the wheel 16. The locomotive 12, &c is thus halted, with its rear wheels 26, driven by a spring or electric motor and formed with teeth, engaging gears 30, 30, Fig. 4, extending up through a track section 20', Fig. 1, and driving through a train ofgears, Fig. 5 (not shown), to the carrier wheel 16. The motor of the locomotive 12 now rotates the wheel 16, until a cut-out portion 66, Fig. 6, of the wheel aligns with the gate 76 at the end of the chute 74, allowing the doll 21 to roll through and into one of the carriages 18. The wheel 16 continues to rotate, another doll 21 in another carriage 18 being deposited onto the entrance 104, Fig. 4, at the top of another chute 106, down which it rolls to be deposited onto the wagon 14. The sideways extending pin 78, Fig. 3, engaging the flange 80, is carried by the upper compartment 90 of the wagon 14, which is spring mounted on its base. The weight of the doll 21 deposited into the wagon 14 forces its upper compartment 90 down on its spring mounting, releasing the pin 78 from the flange 80, and the locomotive 12, &c is freed to move off once more round the track 10.
Patent GB-1525787-A (GB)
Title: Stabilised vinyl chloride polymer compositions
IPC: C08K5/098
Filed: 1976-11-24
Abstract: 1525787 Stabilizers for vinyl chloride polymers; cyclic ketones RHONE POULENC INDUSTRIES 24 Nov 1976 [20 May 1976] 49006/76 Addition to 1511621 Heading C3K Vinyl chloride polymer compositions contain as stabilizer (a) 0À1-5 p.h.r. of an organic divalent metal salt with stabilizing properties (b) 0À05-5 p.h.r. of an organic compound of formula  where R 1  contains a divalent C 1-36  alkylene, C 2-36  alkenylene, C 7-36  aralkylene, an arylene or cycloalkylene chain containing less than 14 carbon atoms, or, for the above aliphatic R 1  moieties above, ether, keto- and ester varients thereof; R 2  represents a C 1-36  alkyl, C 2-36  alkenyl, C 7-36  aralkyl, an aryl or cycloaliphatic chain containing less than 14 carbon atoms, or for the above aliphatic R 2  moieties above, ether, keto and ester varients thereof. Optionally, R 1  and R 2  may be linear or branched, and may be substituted, e.g. by halogen, or by methyl or ethyl groups, for cases where R 1  and R 2  are aryl or cycloaliphatic radicals. In the examples, compound (b) is variously stearoyltetralone + palmitoyltetralone, 2- acetyl - tetralone, 2 - acetyl - cyclohexanone, 2 - benzoyl - cyclohexanone and 2 - acetylcyclohexane - 1,3 - dione.
Patent GB-1492797-A (GB)
Title: Safety belt arrangement
IPC: B60R22/347
Filed: 1974-11-13
Abstract: 1492797 Retracting safety belts ZINSERMASCHINENBAU KG and H KUHL [trading as KUHL - ENTWICKLUNGEN] 13 Nov 1674 [13 Nov 1973] 49103/74 Heading A3V A device for winding up a safety belt comprises a spindle rotatable by a spring, but normally locked against rotation by a dog clutch 30, 32. The release button 35 is manually actuated and when released the belt may be withdrawn or wound-up by the spring. In other embodiments the release button may be actuated electromagnetically or pneumatically; there may be two spindles mounted within the housing; and a multi-disc brake may be provided to limit the tensile load on the strap.
Patent GB-1456656-A (GB)
Title: Methods of protecting metals meth
IPC: C23C28/00
Filed: 1973-10-22
Abstract: 1456656 Halide diffusion coating with rare earth metals OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES 22 Oct 1973 [23 Oct 1972] 49137/73 Headings C7A C7D and C7F A substrate containing more than 50% of one of Fe, Co, Ni, Mo or W has a protective coating containing Al and an intermediate layer containing a rare earth metal or an alloy thereof, e.g. mischmetal which is applied by halide diffusion. The intermediate coating may be an alloy of rare earth metal, Fe, Co, Ni, Mo or Cr. The Al coating may also be applied by halide diffusion and it may contain Cr. The substrate may be first coated with Ni and Ti. An alloy which is 35 Yt - 45 Ni - 20 Cr is formed by mixing Yt and Ni with ammonium chloride and calcined alumina, and heated at 1050 to 1100‹C in hydrogen. After cooling, Cr and ammonium chloride are added, the mixture heated, and cooled to give an alloy - calcined alumina mixture. Examples are also described for making La-Co-Cr; La-Yt-Ce-Fe-Ni; mischmetal-Ni-Cr. The alumina may be replaced by magnesia which may be removed with citric or tartaric acids.
Patent GB-1355814-A (GB)
Title: Alkyldialkanolamine derivatives
IPC: C08L77/00
Filed: 1973-10-24
Abstract: 1355814 Amino alkyl esters SANDOZ Ltd 26 May 1971 [2 June 1970] 49510/73 Divided out of 1355813 Heading C2C The invention comprises aminoalkyl esters of alkanoic acids of formula R 1 COOC n H 2n NR 2 R 3  where R 1  is C 1-24  alkyl, R 2  is C 1-5  hydroxyalkyl, R 3  is C 1-5  alkyl and n is 1 to 4. Preferably R 1  is C 7-17  particularly C 11-17 , R 2  is hydroxyethyl and R 3  is methyl or butyl. The compounds may be prepared by dialkanolamines with carboxylic acids, or esters, anhydrides or halides thereof, at 140 to 190‹ C. Specified acids are acetic, propionic, butyric, isobutyric, valeric, isovaleric caproic, enanthic, caprylic, pelargonic, capric, undecanoic, lauric, myristic, palmitic, stearic, arachic and behenic acids. The compounds may be used as antistatic agents in thermoplastics, e.g. polyolefins.
Patent GB-1068220-A (GB)
Title: Industrial lift truck
Inventor: KOTTE GUNTER
IPC: B66F9/10
Filed: 1964-12-08
Abstract: 1,068,220. Masted lift trucks. SCHWERMASCHINENBAU-VERLADE UND TRANSPORTANLAGEN LEIPZIG VEB. Dec. 8, 1964, No. 49922/64. Heading B8H. The mast of a lift truck is movable rectilinearly on a superstructure 2 which is rotatable, about a vertical axis, on a pivot 3. The superstructure 2 is provided with a load supporting surface 4 and with a driver's seat 5 which is offset to one side of the superstructure. The chassis is provided with wheels that can be steered.
Patent GB-1019409-A (GB)
Title: Improvements relating to apparatus for use in translating data
IPC: G06V30/194
Filed: 1964-12-09
Abstract: 1,019,409. Electric selective signalling. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 9, 1964 [Dec. 20, 1963], No. 50016/64. Heading G4H. A table look-up store for code conversion is accessed using an address constructed in part from the character to be converted and in part from a control character specifying the target code. One control character may apply to a plurality of succeeding characters to be converted, being used until the arrival of a further control character.
Patent GB-1510227-A (GB)
Title: Circular seal especially an axial seal for wheel brakes on vehicles
IPC: F16J15/16
Filed: 1975-12-08
Abstract: 1510227 Rotary seals VOLVO AB 8 Dec 1975 [10 Dec 1974] 50297/75 Heading F2T An axially acting seal in a rotary brake drum, comprising a conical member 5 of elastic material firmly attached to the brake drum 1 and having an edge 6 for forming a rubbing seal with a planar surface 7 of an associated stationary member 8, is characterized by a plurality of ballast members of higher density than that of the elastic material, e.g. lead balls 14, provided in the conical member 5, so that in use, the edge 6 is moved away from the planar surface 7 by centrifugal force when its rotational speed exceeds a predetermined value.
Patent GB-1520440-A (GB)
Title: Polymerization process
IPC: C08F2/24
Filed: 1975-12-09
Abstract: 1520440 Emulsion polymerization; scale prevention MONTEDISON SpA 9 Dec 1975 [10 Dec 1974] 50403/75 Heading C3P Monoethylenically unsaturated monomers are continuously polymerized in aqueous emulsion by feeding the monomer emulsions through a succession of separate polymerization zones under superatmospheric pressure generated or contributed to by hydrostatic pressure, the zones being arranged at successively increasing heights, and reagent steam being conveyed from the lowest to the highest zone. Use of superatmospheric pressure inhibits foaming of the emulsion and formation of polymer scale. Suitable apparatus is shown in the figure, where (1) is a "seeding pot", and (2) is the polymerization pot, (3) is a "finishing pot", (4) is equipped with a watercoil for cooling the dispersion, and (5) is the vessel wherein the preliminary emulsion is formed; polymerization is performed in pots (1), (2) and (3).
Patent GB-1533997-A (GB)
Title: Integrated circuits
IPC: G11C11/404
Filed: 1975-12-09
Abstract: 1533997 Memory access arrangements MOSTEK CORP 9 Dec 1975 50439/75 Heading G4A [Also in Division H3] A random access memory on a semiconductor chip has a single set of address inputs which are used to apply row and column addresses successively to latches on the chip. The memory may be of the dynamic type requiring periodic refreshing and may be fabricated from MISFET devices 11 having associated storage capacitance 12. Arrow address strobe RAS triggers a row clock and control circuit 22 comprising a series of delay circuits to produce a sequence of signals for precharging various points in the memory, including the column buses CB, loading the address input signals into row address latches 14 and sensing the state of the cells the addressed row of the memory. The sensed states of the cells are stored in corresponding sense amplifier circuits SA (see below). During this process the addressed row of cells is refreshed. A column address strobe CAS, concurrent with a chip select signal CS, triggers a column clock and control circuit 24 to produce a sequence of control signals for loading the address input signals then present into column address latches 16 and connecting the sense amplifier corresponding to the latched column address to a data bus and output latch 28 for a read operation. If a read operation is followed by a write operation, a write signal causes the new bit to be loaded into an input latch 26 and the selected sense amplifier SA modifies the voltage  of the corresponding column bus CB accordingly to charge or discharge the cell capacitance of the cell selected by the latched row and column addresses. Write operations may be performed without preceding read operations. A succession of read, read/write or write operations may be performed on the cells of a selected row for a single RAS cycle by strobing in a succession of column addresses.
Patent GB-1492763-A (GB)
Title: Process for curing epoxy-group containing compounds
IPC: C08G59/68
Filed: 1974-11-21
Abstract: 1492763 Curing polyepoxides with polyamides VEBA-CHEMIE AG 21 Nov 1974 50524/74 Headings C3B and C3R Resins are produced by curing a compound containing more than one 1,2-epoxy group with a curing agent obtainable by contacting at 0‹ to 300‹ C. (I) a compound with (II) a diamine H 2 N-R-NH.R<SP>1</SP> where R is a bivalent branched aliphatic hydrocarbon radical having 1 to 3 C-alkyl substituents on chain carbons not adjacent to the N atoms, a cycloaliphatic radical with at least one C-alkyl substituent, or a cycloaliphatic-aliphatic-cycloaliphatic radical, and has 4 to 38 carbon atoms; each R<SP>1</SP> is independently H, alkyl or aryl; and X is hydroxy, alkoxy, aryloxy, amino, alkylamino or Numerous reactants (I) and (II), epoxy resins and cure accelerators are mentioned. In specific examples the following are used: Reactants (I): ethyl acrylate, methyl methacrylate and acrylic acid; diamines (II): 2,2,4- and 2,4,4-trimethyl hexamethylene diamine, 2,2-dimethyl pentamethylene diamine, 1,4-diamino-2-methyl cyclohexane, and isophorone diamine; epoxide: diglycidyl ether of 2,2-bis-(4-hydroxyphenyl) propane.