Flexibilized chemically resistant epoxy resin

Details Flexibilized chemically resistant epoxy resin Flexibilized chemically resistant epoxy resin

1983-01-21

1985-07-30

Lee, Lester L.

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

Synthetic resins

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

525112, 525187, 525237, 525241, 525529, 525530, 528110, 528297, C08F28310

Patent

active

045322996

ABSTRACT:
A method for flexibilizing an epoxy resin is disclosed which comprises (a) preparing a dicarboxy-terminated prepolymer by reacting a carboxylic anhydride with a polybutadiene having a minor amount of pendant vinyl groups at a temperature from about 125.degree. to about 140.degree. F.; (b) reacting the prepolymer with an excess of liquid epoxy resin at a temperature from about 180.degree. to about 200.degree. F.; (c) adding a vinyl monomer in an amount of about 2% to about 25% of the mixture; and (d) adding epoxy and vinyl polymerization catalysts to cure the mixture.

REFERENCES:
patent: 3296186 (1967-01-01), Gunkel
patent: 3989610 (1976-11-01), Tsukada et al.
patent: 4014771 (1977-03-01), Rosenkranz et al.
patent: 4016022 (1977-04-01), Browning et al.
patent: 4025578 (1977-05-01), Siebert
patent: 4173593 (1979-11-01), Smith et al.
patent: 4284753 (1981-08-01), Hewitt, Jr.

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