Foamable gel with an aqueous blowing agent expandable to form a

Details Foamable gel with an aqueous blowing agent expandable to form a Foamable gel with an aqueous blowing agent expandable to form a

1992-10-23

1995-01-10

Acquah, Samuel A.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 74, 521 79, 521 80, 521 82, 521 97, 521142, 521146, 521910, 264 50, 264 51, C08J 900

Patent

active

053807677

ABSTRACT:
Disclosed is a foamable styrenic polymer gel containing an aqueous blowing agent capable of forming a closed-cell, unimodal foam structure. The gel composes in admixture the flowable melt of a polymer composition having greater than 50 percent by weight of a styrenic polymer and a blowing agent having about 1 percent or more by weight water based upon the total weight of the blowing agent. The styrenic polymer has a degree of water solubility sufficient to ensure formation of a unimodal foam structure instead of a bimodal foam structure. The unimodal cell size distribution provides desirable fabricability and machinability characteristics for the foam structure.

REFERENCES:
patent: 4455272 (1984-06-01), Schubert et al.
patent: 4559367 (1985-12-01), Hurps et al.
patent: 5244927 (1993-09-01), Binder et al.

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