Plastic molded articles having a polymer matrix filled with inorganic fillers

US5800910A · kind A · utility

Assignees

• BLANCO GMBH + CO KG · DE
• SCHOCK GMBH · DE

Inventors

• Stefan Harke · Wollerau, CH
• Stefanie Grathwohl · Oberderdingen, DE
• Rudolf Paternoster · Rinchnach, DE
• Thomas Wilhelm · Taunusstein, DE
• Klaus Hock · Regen, DE
• Werner Fenzl · Regen, DE

Key dates

• Filing date: Aug 28, 1996
• Grant date: Sep 1, 1998
• Expiry date: Aug 28, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/25
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

To improve the resistance to scratching of plastic molded articles comprising a polymer matrix filled with inorganic fillers, the filler content being 50 to 90% by weight in relation to the filled matrix, it is suggested that the filler comprise two filler fractions (a) and (b), wherein the filler fraction (a) has a particle size distribution with 98% by weight of the particles having a particle size .ltoreq.150 .mu.m and is distributed essentially uniformly in the polymer matrix, and wherein the filler fraction (b) comprises particles having a particle size of approximately 300 .mu.m to approximately 3000 .mu.m, wherein the proportion of the filler fraction (b) is approximately 1 to 35% by weight of the total filler content, and wherein the proportion of the filler fraction (b) in an outer surface layer of the molded article is enriched to at least 30% by weight in relation to the total mass of the filled matrix.