Primary-tertiary diamines mixed with polyamines as epoxy resin hardeners

摘要

An amine hardener composition for curing epoxy resin based coatings and related products comprising (A) from 5 to 75% of a diamine which possesses a vapor pressure less than about 133 Pascals at 20 DEG C., contains both a primary and a tertiary amine and corresponds to either of the structures: <IMAGE> <IMAGE> where R1 and R2 are independently C1-C8 alkyl; X is -CH2-CH2-, -CH2-CH2-CH2-, or -CH2-O-CH2-; and n is 2-6, (B) from 5 to 95% of a polyamide, amidoamine, Mannich base or cycloaliphatic amine curing agent; and (C) from 0 to 50% of other active hydrogen containing dismines or polyamines. Coatings based on the composition can be formulated at up to 100% solids, and have an excellent combination of pot life and dry speed.