Co-curing agents for epoxy resins

Details Co-curing agents for epoxy resins Co-curing agents for epoxy resins

C - Chemistry, Metallurgy

08

G

402/254, 402/270

C08G 59/50 (2006.01) C08G 59/18 (2006.01) C08G 59/40 (2006.01) C08L 63/00 (2006.01)

Patent

CA 1175996

ABSTRACT OF THE DISCLOSURE A N-substituted piperazine or N-substituted homopiperazine adduct with a polyepoxide is used as a co-curing agent such as dicyandiamide. a carboxylic acid anhydride, or a dihydrazide. The preferred adducts have a ratio of epoxy groups to secondary amino groups of between 1.2:1 and 3:1. The preferred polyepoxides are polyglycidyl ethers of 4,4'-isopropylidenediphenol (bisohenol A). Suitable adducts are prepared from N-methyl-, N-(2-hydroxyethyl)-, N-octyl, N-phenyl- and N-benzyl piperazine and N-methyl homopiperazine.

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