Process of making thermoset foams of acrylic polymers

Details Process of making thermoset foams of acrylic polymers Process of making thermoset foams of acrylic polymers

1980-01-02

1981-09-22

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

428313, 428460, 428463, 521149, 525162, C08J 902, B32B 520

Patent

active

042911303

ABSTRACT:
High density thermoset foams of acrylic polymers are prepared by dry mixing a hydroxy-functional acrylic polymer, e.g., a copolymer of styrene, ethyl acrylate, hydroxy alkyl acrylate and acrylic acid, with a crosslinking agent, e.g., a melamineformaldehyde condensate, and then subjecting the resulting mixture to conditions sufficient to cause the mixture to foam and to crosslink to a thermoset material.

REFERENCES:
patent: 3369003 (1968-02-01), Verdol
patent: 3422038 (1969-01-01), Meyer et al.
patent: 3598770 (1971-08-01), Moore et al.
patent: 3650995 (1972-03-01), Erickson
patent: 3708444 (1973-01-01), Gangler et al.
patent: 3714078 (1973-01-01), Gordon
patent: 3740357 (1973-06-01), Wax
patent: 4008293 (1977-02-01), Maska

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