Patent ID: 8735512
Filing Date: 2014-05-27
Classification: C07C,C08G,C08L,C09D

Abstract:
1. An epoxy curing agent composition comprising: Mannich base derivatives of an N,N′-dimethyl secondary diamine polymer comprising the contact product of (a) at least one aldehyde compound; (b) at least one phenol compound; and (c) at least one N,N′-dimethyl secondary diamine polymer having a number-average molecular weight (M wherein: m is 1, 2, or 3; wherein: R is defined as above; t is 1 or 2 ; each R″ independently is a hydrogen atom or a moiety having the formula; wherein: R is defined as above; u is 0, 1, or 2; and each X independently is a polyoxyalkylene moiety or a moiety having the formula: wherein: R1 is a C2-C8 linear or branched alkanediyl; and n is an integer in a range from 1 to 10, inclusive; and wherein: the at least one aldehyde compound comprises formaldehyde; the at least one phenol compound comprises phenol, cresol, t-butyl phenol, nonyl phenol, cardanol, or a combination thereof; and the at least one N,N′-dimethyl secondary diamine polymer comprises methylamine-terminated poly-(N-methyl-azetidine), methylamine-terminated poly-(N-methyl-azacycloheptane), or a combination thereof.