Novel matting agent and its use

US4978718A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Ingo Haller · Wuppertal, DE
• Ernst Spindler · Burghausen, DE
• Manfred Heisler · Emmerting, DE
• Willi Kleine · Burghausen, DE

Key dates

• Filing date: Aug 22, 1986
• Grant date: Dec 18, 1990
• Expiry date: Aug 22, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A matting agent for plastic compositions comprising either a high molecular weight, gel-containing vinyl chloride polymer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.2 cm.sup.3 /g, a maximum plasticizer absorption of 15%, a particle size parameter d' of 10 to 80 .mu.m and a coefficient of uniformity n greater than 3, or a high molecular weight, gel containing copolymer of vinyl chloride and 1 to 40% by weight of comonomer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.10 cm.sup.3 /g, a maximum plasticizer absorption of 10%, a particle size parameter d' of 10 to 80 .mu.m and a coefficient of uniformity n greater than 3, plastic articles containing said matting agent and a method of imparting a matt to the surface of plastic articles.