Method for producing organopolysiloxanes

US8076438B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventor

• Hartmut Ackermann · Burghausen, DE

Key dates

• Filing date: Sep 8, 2006
• Grant date: Dec 13, 2011
• Expiry date: Jan 13, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Organopolysiloxanes are prepared in a multistage process by a first partial hydrolysis with from 0.002 to 0.6 mol water per hydrolyzable chlorine and alcohol at a water to alcohol ratio of 0.001 to 1.5, then further hydrolyzing with additional water, and then separating an aqueous alcoholic phase from an organopolysiloxane phase.