Water-insoluble phenol-formaldehyde-polyamines, method for makin

Details Water-insoluble phenol-formaldehyde-polyamines, method for makin Water-insoluble phenol-formaldehyde-polyamines, method for makin

1984-07-11

1985-01-01

Schain, Howard E.

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

Synthetic resins

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

525481, 528162, 528163, 528164, 544378, 564306, 564367, 564368, 427386, 428413, 428418, C08G 1406, C08G 1412

Patent

active

044916540

ABSTRACT:
A water-insoluble curing agent for epoxy resins, made by mixing a major amount by weight of a water-insoluble propylene diamine chosen from the group consisting of the C.sub.8 to C.sub.20 fatty propylene diamines and the C.sub.12 to C.sub.15 ether propylene diamines with a minor amount by weight of a water-soluble polyamine suitable for rapid cure of epoxy resins, mixing the resulting mixture with a water-insoluble substituted phenol to give a water-insoluble reaction product, and then reacting said reaction product with formaldehyde. A novel cured epoxy resin is produced by reacting the agent with an uncured epoxy resin, and the reaction can be done in a wet environment or even under water.

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Formaldehyde, 3rd Ed., Walker, p. 364, 1964.

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