Patent GB-990030-A (GB)
Title: Improvements in and relating to curable polyepoxide compositions
IPC: C08G59/50
Filed: 1961-09-14
Abstract: Amino - esters, hydroxyalkylamino - esters, amino-amides and hydroxyalkylamino-amides are prepared by reacting alkyl esters of acrylic, methacrylic or ethacrylic acid and alkylene-diamines, hydroxyalkylalkylenediamines, polyalkylenepolyamines and hydroxyalkylpolyalkylenepolyamines. Particular products referred to are C2H5OCOC2H4(NHC2H4)4 COOC2H5 from ethyl acrylate and triethylenetetramine (2: 1); NH2C2H4(NHC2H4)2CO (NHC2H4)2NH2 from ethyl acrylate and diethylenetriamine (1: 2); HOC2H4(NHC2H4)3COOC2H5 from ethyl acrylate and N-hydroxyethyl diethylenetriamine (1: 1); and HOC2H4(NHC2H4)3CO (NHC2H4)3OH from ethyl acrylate and N-hydroxyethyl diethylenetriamine. Many other reactants are specified. Specifications 666,732, 787,051, 788,556, 792,187, 865,314 and 880,446 are referred to.ALSO:Curable compositions comprise a polyepoxide having an epoxy equivalency of greater than one and an adduct comprising an alkylene-polyamine or hydroxyalkylalkylenepolyamine and an acrylate having the general formula <FORM:0990030/C3/1> wherein R1 is hydrogen or an alkyl radical and R2 is an alkyl radical, the adduct containing an average of more than two amino-hydrogen atoms per molecule and being present in an amount sufficient to cure the composition to a hard, tough, infusible, impermeable product.  The polyepoxide may be a polyglycidyl ether of a polyhydric phenol, a novolak resin or a polyhydric alcohol, polyglycidyl esters of polycarboxylic acids, polyglycidyl derivatives of aromatic amines and aminophenols and epoxidized unsaturated compounds such as bis(2,3-epoxy-cyclopentyl)ether. Many polyepoxides, alkylene-polyamines of the formula <FORM:0990030/C3/2> wherein a is from 2 to 10 and n is from 1 to 6, hydroxyalkylalkylenepolyamines of the formula <FORM:0990030/C3/3> wherein m is from 0 to 3 and b is from 2 to 6, R is hydrogen or an hydroxyalkyl radical containing from 1 to 4 carbon atoms, the molecule containing from 1 to less than m+2 hydroxyalkyl groups, and alkyl acrylates are specified. Solvents, e.g. acetone, methyl isobutyl ketone, isophorone, ethyl acetate, butyl acetate, 2-hydroxyethyl acetate, 2-methoxyethyl acetate, and the monomethyl, monoethyl and monobutyl ethers of ethylene and diethylene glycol, which may be used mixed with benzene, toluene, xylene, ethanol, isopropanol and butanol; and/or reactive diluents such as butyl, allyl and phenyl glycidyl ethers, as well as peroxides such as benzoyl peroxide and accelerators such as triphenyl phosphite may also be added to the compositions.  The compositions are useful in the manufacture of electrical castings, the encapsulation of electrical components and as coating compositions.  Specifications 666,732, 787,051, 788,556, 792,187, 865,314 and 880,446 are referred to.ALSO:Polythene bottles may be coated by spraying, flushing, immersing or roller coating with compositions comprising a polyepoxide and an adduct of an alkylenepolyamine or hydroxyalkyl-alkylenepolyamine and an acrylate of the formula CH2:CHR1CO2R2 wherein R1 is hydrogen or an alkyl radical and R2 is an alkyl radical (see Division C3).  The compositions may also contain solvents, diluents, reactive diluents, peroxides and accelerators. Specifications 666,732, 787,051, 788,556, 792,187, 865,314 and 880,446 are referred to.