Stabilization of polyvinyl chloride

US4590233A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Werner Erwied · Langenfeld, DE
• Bernd Wegemund · Haan, DE
• Peter Wedl · Loxstedt, DE
• Kurt Worschech · Loxstedt, DE

Key dates

• Filing date: Dec 14, 1984
• Grant date: May 20, 1986
• Expiry date: Dec 14, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/098
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a stabilized polyvinyl chloride molding mixture containing a stabilizer combination based upon alkali metal, alkaline earth metal, and/or zinc soaps, co-stabilizers, powdered, crystalline, hydrous aluminosilicate, and flow promoters, as well as optionally additional conventional additives, the improvement which comprises, per 100 parts by weight of polyvinyl chloride, PA0 (a) from about 0.2 to 5 parts by weight of a synthetic, crystalline, powdered alkali metal aluminosilicate containing from about 13 to 25 percent by weight of water of crystallization; and PA0 (b) from about 0.1 to 5 parts by weight of at least one co-stabilizer selected from the group consisting of .beta.-diketones, .alpha.-ketoenol esters, .alpha.-acyllactones, substituted 1,4-dihydropyridine-3,5-dicarboxylic acids, and pyrrole, the pyrrole being unsubstituted or substituted.