US 5,179,172 AGranted

Epichlorohydrin or chlorine-containing vinyl or acrylate (co)polymer-modified amines

AssigneeHenkel Research Corporation

InventorsRichard M. Chan, Ta Y. Ching, Ta-Wang Lai

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Abstract

Curing agents for epoxy resins composed of (a) the reaction product of a co-reactant comprising either an epichlorohydrin (co) polymer or a (co)polymer of a chlorovinyl acetate, chloroalkyl acrylate with an organic amino compound containing at least one active hydrogen and having a pK.sub.B value within the range of from about 7 to about 9, preferably imidazole and substituted imidazoles; (b) an N-fatty imidazole and (a); (c) an N-fatty imidazole and an elastomeric polymer are disclosed. The curing agents are essentially water insoluble and give rise to epoxy resins which may be cured at relatively low temperatures below about 100.degree. C. The epoxy resins are suitable for use as adhesives, coatings and in composite applications.

Claims21

Dependent claims

An curing agent comprising the reaction product of an imidazole compound having at least one reactive hydrogen atom and having a basic dissociation constant pK.sub.b value within the range of from about 7 to about 9, with a co-reactant having the following structure as defined by formula I or formula II:

I. An epichlorohydrin oligomer or elastomeric polymer or copolymer having recurring groups of the formula:
##STR6## wherein R is selected from the group consisting of hydrogen and a C.sub.1 to C.sub.18 alkyl group, n is an integer of from 5 to 200, m is an integer of from 0 to 200, and t is an integer of from 1 to 3;
or
II. A chlorine-containing oligomer or elastomeric polymer or copolymer of an alkyl acrylate or methacrylate with a chlorovinyl acetate, chloroalkyl vinylether or chloroalkyl acrylate having recurring groups of the formula:
##STR7## wherein R.sub.1 is hydrogen or methyl, R.sub.2 is a C.sub.2 to C.sub.12 alkyl group;
k is an integer of from 0 to 200, p is an integer of from 5 to 200, X is oxygen or a carboxyl group, and Y is an ethylene or methylene group.

3 more elements

Dependencies are inferred from the claim text.