High flexural modulus reaction injection molded urethanes

Details High flexural modulus reaction injection molded urethanes High flexural modulus reaction injection molded urethanes

1979-12-05

1982-07-27

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521126, 521129, 521160, 521167, 521175, 521914, 2643281, 26433119, 264 53, C08G 1814, C08G 1832, C08G 1848

Patent

active

043418759

ABSTRACT:
A two-part liquid composition capable of being mixed with a foaming agent and placed in a reaction injection molding apparatus to form a microcellular composition, which when cured yields a urethane product having improved flexural modulus properties. The composition is comprised of a part "A" which is comprised of an organic isocyanate, and a part "B" which is comprised of a base polyol, a catalyst, and a chain extending agent mixture comprised of a glycol and at least one high functionality supplemental polyol.

REFERENCES:
patent: 3476933 (1969-11-01), Mendelsohn
patent: 4048105 (1977-09-01), Salisbury
patent: 4055548 (1977-10-01), Carleton et al.
patent: 4076695 (1978-02-01), Keil
patent: 4126742 (1978-11-01), Carleton et al.
patent: 4190711 (1980-02-01), Zdrahala et al.
Exparte Fred Lister et al., Decision of the Board of Appeals in U.S. Pat. No. 3,296,179, Apr. 12, 1966.
Exparte Wallace Karl Bingham et al., Decision of the Board of Appeals in U.S. Pat. No. 3,527,729, Nov. 14, 1969.

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