Thermoplastic foam and method for production thereof

Details Thermoplastic foam and method for production thereof Thermoplastic foam and method for production thereof

2005-06-14

2005-06-14

Seidleck, James J. (Department: 1711)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C521S054000, C521S091000, C521S122000

Reexamination Certificate

active

06906119

ABSTRACT:
A thermoplastic foam is provided which contains a thermoplastic resin and a layered silicate and in which foam cells and the layered silicate are evenly and finely dispersed.A volume-expansible gas or heat decomposable blowing agent is incorporated into interlayer spaces of a layered silicate in a composite material containing 100 parts by weight of a thermoplastic resin and 0.1-50 parts by weight of the layered silicate, and the gas or blowing agent is allowed to expand in volume or thermally decompose to form foam cells6, so that a thermoplastic foam is obtained in which the layered silicate has an average interlayer spacing of over 60 Å when determined by an X-ray diffractometry.

REFERENCES:
patent: 4739007 (1988-04-01), Okada et al.
patent: 0352042 (1990-01-01), None
patent: WO 9304118 (1993-03-01), None
JP 62-74957, A (JP, 8-22946, B) and English abstract thereof.
JP 9-183910, A and English abstract thereof.
JP 10-182892, A and English abstract thereof.
JP 8-143697, A and English abstract thereof.
Patent Abstracts of Japan, vol. 1998, No. 12, Oct. 31, 1998 & JP 10 182141A.
Patent Abstracts of Japan, vol. 007, No. 248 Nov. 4, 1983 & JP 58 136630 A.

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