Process for stabilizing organopolysiloxanes

US4710558A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Reinhard Jira · Burghausen, DE
• Ralph Ottlinger · Rosenheim, DE

Key dates

• Filing date: Aug 1, 1986
• Grant date: Dec 1, 1987
• Expiry date: Aug 1, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/109
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for stabilizing organopolysiloxanes containing alkaline compounds such as alkali metal hydroxides, alkali metal silanolates, alkali metal siloxanolates, or a mixture of at least two such compounds, which comprises neutralizing the alkaline compound present in the organopolysiloxanes with a neutralizing agent selected from a compound containing carbon, hydrogen, and oxygen atoms, and optionally at least one halogen atom, in which the compound has 2, 3 or 4 hydrocarbon groups bonded to the same carbon atom via oxygen, or an acylacetic acid ester. The resultant organopolysiloxanes are stabilized against viscosity changes caused by the alkaline compounds.