Epoxy resin curatives and method using lactone-imidazole complex

Details Epoxy resin curatives and method using lactone-imidazole complex Epoxy resin curatives and method using lactone-imidazole complex

1992-10-01

1993-10-05

Krass, Frederick F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525529, 525533, 528 94, 528116, 528354, 528355, C08G 5968, C08G 6510, C08G 6382

Patent

active

052506380

ABSTRACT:
An epoxy resin composition comprises the cured reaction product of an epoxy resin and a lactone-imidazole complex. For example, complexes of butyrolactone and caprolactone with 1-isopropyl-2-methyl imidazole were formed wherein the mole ratio of lactone:imidazole ranged from 1:1 to 2:1. The complexes are less reactive than the imidazole alone, giving them an extended pot life. The compositions are useful for making filament windings where an extended working time is required. Other applications include those in which it would be impractical to use the more reactive unmodified imidazole as the sole curing agent.

REFERENCES:
patent: 3222312 (1965-12-01), Wyart et al.
patent: 3294743 (1966-12-01), Mack
patent: 3489695 (1970-01-01), Green
patent: 4931528 (1990-06-01), Waddill et al.

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