Continuous process for the production of base compositions for improved-stability silicone compositions

US8287174B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Thomas Frese · Norderstedt, DE
• Thomas Hierstetter · Burghausen, DE
• Johann Schuster · Oberasbach, DE
• Christof Woerner · Burghausen, DE

Key dates

• Filing date: Dec 17, 2009
• Grant date: Oct 16, 2012
• Expiry date: Jul 25, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2383/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Base compositions for addition-crosslinking silicone compositions are continuously produced by, in a first stage, homogeneously mixing and kneading organopolysiloxanes and flowable prehydrophobized oxidic reinforcing fillers in a continuous kneading machine with kneading chambers arranged alongside one another. In a second, downstream, stage of the process, the compositions produced in the first stage are subjected to aftertreatment in a mixing apparatus in which the compositions have been subjected to a mixing procedure with introduction of shear force.