Method for producing high filler content plastic molded articles which resemble granite

US5882560A · kind A · utility

Assignee

• Roehm GmbH Chemische Fabrik · DE

Inventors

• Gunther Ittmann · Groß-Umstadt, DE
• Manfred Krieg · Darmstadt, DE

Key dates

• Filing date: May 23, 1996
• Grant date: Mar 16, 1999
• Expiry date: May 23, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/31
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Filled plastic molded articles based on polymethyl methacrylate (PMMA), which articles resemble granite, are prepared by preparing a casting resin suspension comprising: (A) 20-80 parts by wt. (pbw) of a liquid PMMA polymer precursor; (B) 0-75 pbw of a non-metallized particulate filler; (C) 0-5 pbw, based on the sum of components (A) and (B) of a polymerizable organosilicon compound; and (D) 0-2 wt. % of at least one pigment or colorant; suspending metallic appearing particles of a platelet-like stratified silicate (SS) in the particle size range of 20-500 .mu.m in an amount of 1-35 pbw, based on the sum of components (A) and (B); polymerizing the suspension under free radical conditions in a polymerization mold; and removing the polymerized article from the mold.