Amine curatives for flexibilized epoxies

Details Amine curatives for flexibilized epoxies Amine curatives for flexibilized epoxies

1997-02-07

1998-04-14

Krass, Frederick

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

Synthetic resins

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

528103, 528121, 528124, 528407, C08G 5944, C08G 5950

Patent

active

057392099

ABSTRACT:
Reductive alkylation of branched, short chain diamines, such as 2-methyl-1,5-pentanediamine, with certain aldehydes or ketones of moderate molecular weight, such as benzaldehyde or methyl isobutyl ketone, produces novel tri- and difunctional amines which are useful in curing epoxy resins to compositions having improved flexibility and enhanced resistance to moisture and chemicals. Particularly favorable results are achieved when this curative is combined in the epoxy formulation with low molecular weight acrylic copolymers added as flexibilizers. Further improvements are available by including in the recipe monofunctional epoxy or acrylic reactive diluents.

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