Formable polyamide compositions

Details Formable polyamide compositions Formable polyamide compositions

C - Chemistry, Metallurgy

08

J

403/58

C08J 9/08 (2006.01) C08L 77/00 (2006.01)

Patent

CA 1193400

ABSTRACT OF THE DISCLOSURE A foamable polyamide composition comprising an admixture of an aliphatic polyamide and 0.2 to 10 parts by weight, per 100 parts of polyamide, of a blowing agent is disclosed. The blowing agent is a carbonate or basic carbonate of zinc, iron or copper. The preferred blowing agent is zinc carbonate. Examples of ali- phatic polyamides are polyhexamethylene adipamide, polycaprolactam, poly-ll-aminoundecanoic acid and copolymers of adipic acid and hexamethylene diamine with caprolactam and/or sebacic acid. A process for the manufacture of foamed aliphatic polyamide struc- tures is also disclosed. The composition and process of the present invention may be used for the manufacture of foamed poly- amide structures.

239627

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