Primary-tertiary diamines mixed with polyamines as epoxy resin h

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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525420, 5254205, 525423, 525504, 525523, 528120, 528335, 528342, C08G 6934, C08L 6302, C08L 6304

Patent

active

056889054

ABSTRACT:
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.degree. C., contains both a primary and a tertiary amine and corresponds to either of the structures: ##STR1## where R.sub.1 and R.sub.2 are independently C.sub.1 -C.sub.8 alkyl; X is --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 --, or --CH.sub.2 --O--CH.sub.2 --; 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.

REFERENCES:
patent: 3008909 (1961-11-01), Ernst
patent: 3947395 (1976-03-01), Ogata et al.
patent: 5385990 (1995-01-01), Abbey et al.
Chemistry and Technology of Epoxy Resins, Ellis, Blackie Academic & Professional, New York, NY, pp. 40-41, 1993.
Kroupa, J. Chem Prum. (1976), 26(9), 477-80.
C. W. Jennings, J. Adhes. (1972), 4(1), 25-38.

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