Process for the continuous preparation of rubber powders and a device for carrying out the process

US6348522B1 · kind B1 · utility

Assignee

• PKU Pulverkautschuk Union GmbH · DE

Inventors

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

Key dates

• Filing date: Mar 13, 2000
• Grant date: Feb 19, 2002
• Expiry date: Mar 13, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2321/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for continuous preparation of filler-containing rubber powders including mixing a filler suspension and rubber latex in the liquid phase. The liquid mixture is passed through a tube, at least a coagulant is added to the tube and filler-containing rubber particles are precipitated. The liquid mixture is passed through at least one throttle position of variable throttle cross-section provided in the tube. The throttle cross-section is adjusted so that the drop in pressure in the liquid mixture achieved across the throttle position is greater than 0.5 bar.