Process for the manufacture of organopolysiloxanes for use in abhesive coating materials

US4306050A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Gotz Koerner · Essen, DE
• Vaclav Kropac · Essen, DE
• Christian Weitemeyer · Essen, DE

Key dates

• Filing date: Jan 30, 1980
• Grant date: Dec 15, 1981
• Expiry date: Jan 30, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method for the manufacture of organopolysiloxanes for use in abhesive coating materials wherein organopolysiloxanes having the formula ##STR1## in which R.sup.1 is an alkyl group with 1 to 4 carbon atoms, a vinyl group and/or a phenyl group, with the proviso that at least 90 mole percent of the R.sup.1 groups are methyl groups, PA1 a has a value 1.8 to 2.2, and PA1 b has a value of 0.004 to 0.5, are reacted with at least equimolar amounts of pentaerythritol triacrylate or pentaerythritol trimethacrylate and separating the product from the solid components suspended therein. The organopolysiloxanes can be rapidly cured and simultaneously fixed on the carrier.