Process for producing pourable powdered rubber containing filler

US4788231A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Hans-Jurgen Smigerski · Marl, DE
• Uwe Ernst · Mannheim, DE

Key dates

• Filing date: Apr 5, 1988
• Grant date: Nov 29, 1988
• Expiry date: Apr 5, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for preparing a pourable powdered rubber containing filler, comprising preparing a blend by mixing a portion of said filler to be incorporated in said rubber product with 0.1 to 6.5 phr of a water-soluble salt of a Group IIa, IIb, IIIa or VIII metal of the Periodic Table and a rubber latex or aqueous emulsion of a rubber solution, adjusting the pH of the blend to a pH ranging from 3.2 to 8.6 by addition of an acid, adding the remaining amount of filler to the pH adjusted blend, separating the rubber containing filler from the aqueous phase of the blend, and drying the powdered rubber product obtained.