Preparing silicone emulsions

US8575266B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Christof Brehm · Konstanz, DE
• Robert Schroeck · Altötting, DE

Key dates

• Filing date: May 2, 2011
• Grant date: Nov 5, 2013
• Expiry date: Oct 29, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a process for preparing emulsions of organopolysiloxanes (O), which includes polymerizing: (1) 100 parts by weight of hydroxyl-terminated organopolysiloxanes and (2) at least 0.01 part by weight of trialkylsilyl-terminated organopolysiloxanes having a viscosity of at least 55 mm2/s in the presence of (3) acidic catalyst and (4) emulsifier in an aqueous medium until the desired molecular size is reached.