Patent GB-1379938-A (GB)
Title: Storagestable rapidly curable epoxide resin composition
IPC: C08G59/54
Filed: 1972-12-20
Abstract: 1379938 Epoxy resins CIBA-GEIGY AG 20 Dec 1972 [24 Dec 1971] 58794/72 Heading C3B Storage-stable, rapidly curable, solid epoxide resin compositions comprise, in admixture, (a) a cyclic polyglycidyl compound with a softening point of between 40 and 140 C., (b) an adduct, possessing free amino groups, of an epoxide resin and an aromatic or cycloaliphatic amine or a mixture of such adducts, and (c) a liquid polyamine. Component (a) is preferably a bisphenol A epoxide resin, a glycidylated phenol or cresol novolac, an adduct, containing more than one epoxide group per molecule, of a liquid bisphenol A epoxide resin or triglycidylisocyanurate and an acid polyester of an aliphatic dicarboxylic acid and an aliphatic diol, mixtures thereof or mixtures thereof with adducts of diglycidyl-tetrahydrobenzimidazolone or diglycidyl-hexahydrobenzimidazolone and an acid polyester of an aliphatic dicarboxylic acid and an aliphatic diol. Component (b) is preferably derived from 4,4<SP>1</SP>-diaminodiphenyl- or 4,4<SP>1</SP>- diamino-dicyclohexyl-alkanes and either a bisphenol-A epoxide resin, a diglycidyl-tetrahydrobenzimidazolone, a diglycidyl-hexahydro-benzimidazolone or a reaction product of an ester of sebacic acid and 3-(21-hydroxyethyl)-5,5-dimethylhydantoin in the molar ratio of 1 : 2 and epichlorohydrin. Component (c) is preferably triethylenetetramine or a polyaminoamide of a dimerized fatty acid. The final composition may be in the form of a powder, granulate or tablets. In examples, (b) is derived from 4,4<SP>1</SP>- diamino-diphenylmethane and a liquid epoxide resin based on bisphenol-A and epichlorohydrin optionally in admixture with an acid polyester of adipic acid and neopentyl glycol and as a further component a glycidyl compound of the Formula (I): from 4,4<SP>1</SP>-diamino-diphenylmethane and an epoxide resin of the N<SP>1</SP>,N-diglycidyl-bis-hydantom type prepared from epichlorohydrin and a sebacic acid diester of 3-(21-hydroxyethyl)-5,5- dimethylhydantoin; and from 4,4-diamino- 3,3-dimethyldicyclohexylmethane and an epoxide resin based on bisphenol A and epichlorohydrin. In examples, (c) is represented by triethylenetetramine or a polyaminoamide derived from dimerized unsaturated fatty acids (predominantly linoleic acid) with triethylenetetramine. In examples: (a) is an adduct of an epoxide resin based on bisphenol A and epichlorohydrin with a mixture of triglycidylisocyanurate and an acid polyester of sebacic acid and neopentyl glycol, further mixed with lithopone; an epoxide resin based on bisphenol A and epichlorohydrin; a glycidylated cresol novolac resin; - a mixture of an epoxide resin based on bisphenol A and epichlorohydrin with an adduct of such resin with a mixture of triglycidylisocyanurate and an acid polyester of sebacic acid and neopentyl glycol; a mixture of a glycidylated cresol novolac resin with an adduct of triglycidylisocyanurate and an acid polyester of sebacic acid and neopentyl glycol; and a mixture of an epoxide resin based on bisphenol A and epichlorohydrin, a glycidyl compound of Formula (1) (above) and an acid polyester of adipic acid and neopentyl glycol. In Example 10 the storage-stable resins are applied to polyester fibre fleeces, or to glass fabric previously wetted with phenoxy-epoxide resin solution, or to nylon fabric previously impregnated with a resin based on bisphenol A and epichlorohydrin hardened with triethylenetetramine, and in each case cured by heating in situ, e.g. at 80 to 130 C. Uses.-For constructing skis.