Epoxy-urethanes based on copolyesters

Details Epoxy-urethanes based on copolyesters Epoxy-urethanes based on copolyesters

1979-07-23

1981-05-12

Lieberman, Paul

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

Synthetic resins

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

525 28, 525 31, C08L 6300

Patent

active

042672880

ABSTRACT:
Described are polyester-urethane-epoxy adhesives produced by reacting one or more diols with two or more dicarboxylic acids to form a polyester prepolymer; chain-extending the prepolymer with an organic diisocyanate to yield a hydroxy-terminated polyester-urethane; capping the urethane partially or completely with a dicarboxylic acid or anhydride of dicarboxylic acid; and finally reacting with an epichlorohydrin/bisphenol A-type epoxy resin, forming an epoxy polyester-urethane block copolymer. The resulting product may then be crosslinked in use as an adhesive.

REFERENCES:
patent: 3158586 (1964-11-01), Krause
patent: 3290208 (1966-12-01), Lewis
patent: 3419510 (1968-12-01), Hudak
patent: 3763079 (1973-10-01), Fryd
patent: 3804810 (1974-04-01), Fryd
patent: 4086293 (1978-04-01), Smith

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