Compositions for polyvinyl chloride resin foams

Details Compositions for polyvinyl chloride resin foams Compositions for polyvinyl chloride resin foams

C - Chemistry, Metallurgy

08

L

403/64, 403/69

C08L 27/06 (2006.01) C08J 9/00 (2006.01) C08J 9/14 (2006.01)

Patent

CA 1122350

ABSTRACT OF THE DISCLOSURE A resin composition expandable into a foam by heating which comprises: 100 parts by weight of a polyvinyl chloride- based resin having an average degree of polymerization not exceeding 2,000 and a pore volume not exceeding 0.20 ml/g; and at least 1 part by weight of a hydrocarbon or a halogenated hydrocarbon having a boiling point not exceeding 90°C and impregnated in the polyvinyl chloride-based resin as a volatilizable foaming agent. The resin composition is improved by the incorporation of 0.5 to 30 parts by weight of an acrylic resin or a styrene-based resin. The composition is further improved by the incorporation of 0.01 to 20 parts by weight of a nucleating agent. The resin composition provides foams of high expansion, very fine and uniform cell structure and free from undesirable coloration.

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