Use of guanidine derivatives as curing accelerators for epoxy resins

摘要

The present invention describes guanidine derivatives of the general formula (I);
having the stated meanings for the residues R1, R2 and R3 as accelerators for cold-curing epoxy resin compositions. The curing of cold-curing epoxy resin systems may advantageously be accelerated with the assistance of these compounds.

主权项

1. A method of accelerating curing of a cold-curing epoxy resin composition comprising adding to the cold-curing epoxy resin a guanidine derivative of Formula (I) wherein: R1 is —CN, —NO2 or —(C═O)—R4; R2 is —H, alkyl, benzyl, phenyl, aryl or —(C═O)—R4; R3 is —H or alkyl; R4 is —H, alkyl, or —O-alkyl; wherein, when R1 is —CN or —(C═O)—R4, R2 is not —H if R3 is —H; wherein the cold-curing epoxy resin composition further comprises at least one amine curing agent for the epoxy resin which is activatable at a temperature of <60° C.