Rubber powder compositions and process for the production thereof

US6433064B1 · kind B1 · utility

Assignee

• PKU Pulverkautschuk Union GmbH · DE

Inventors

• Udo Gorl · Meckenheim, DE
• Reinhard Stober · Großkrotzenburg, DE
• Hartmut Lauer · Salmünster, DE
• Uwe Ernst · Mannheim, DE

Key dates

• Filing date: Dec 14, 1999
• Grant date: Aug 13, 2002
• Expiry date: Dec 14, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2321/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Finely divided, pulverulent rubbers containing filler which contain further processing and vulcanization auxiliaries necessary for the production of vulcanizable rubber mixtures, which rubbers are pourable even after exposure to mechanical action, and to a process for the production thereof. The rubber powder is obtained within two precipitation steps. These rubber powders are used for the production of vulcanizable rubber mixtures. The fillers used, which comprise not only precipitated silicas but also carbon blacks known in the rubber industry, are optionally surface modified with organosilicon compounds.