Novel foam compositions

Details Novel foam compositions Novel foam compositions

1988-12-02

1990-01-09

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

4284231, 521100, 521101, 521110, 521112, 521114, 521122, C08G 1814

Patent

active

048928917

ABSTRACT:
Foam compositions with improved physical characteristics are from urethane prepolymers in the presence of various modifying agents. Blowing agents employed in the presence of surfactants make it possible to obtain either open or closed cell structures, and the degree of foam stiffness may be desirably controlled with polyols, as well as with polymeric polymethylene polyphenylisocyanates. Suitable modifying agents include asphalts, portland cement, epichlorohydrin, other epoxidized compounds, additional polymers, and various other materials.

REFERENCES:
patent: 3903232 (1975-09-01), Wood et al.
patent: 3905923 (1975-09-01), Klug
patent: 4127124 (1978-11-01), Clagett et al.
Hypol. Grace Co., Laboratory Procedures & Foam Formulations, date unknown, pp. 1-31.
PAPI, BASF Corporation, Technical Information, Sep. 1986, all pages.

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