Method of foaming thermoplastic polycarbonate

Details Method of foaming thermoplastic polycarbonate Method of foaming thermoplastic polycarbonate

1993-04-14

1993-10-26

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521139, 521140, 521180, C08J 914

Patent

active

052567028

ABSTRACT:
A method of foaming thermoplastic aromatic polycarbonates is disclosed. Accordingly, a polycarbonate resin is mixed with 0.01 to 10%, the percent being relative to the total weight of polycarbonate resin and polysaccharide, of a particular polysaccharide and the mixture then processed thermoplastically without the application of negative pressure in an extruder, at temperatures of 180.degree. C. to 320.degree. C., or in an injection molding machine, at temperatures of 190.degree. C. to 330.degree. C., to obtain foamed molded articles.

REFERENCES:
patent: 3976605 (1976-08-01), Matsunaga et al.
Database WPIL--AN 88108887[16] and JP-A-63 057 669 (Panac Kogyo KK) Mar. 12, 1988.
R. A. Muzarelli, Chitin, Pergamon Press, Oxford, 1977, pp. 5 ff.

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