Catalyst/cross-linking agent compositions, a method for their preparation and their use

US5925723A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Robert Friebe · Leverkusen, DE
• Peter Schwabe · Leverkusen, DE
• Reiner Voigt · Leverkusen, DE

Key dates

• Filing date: Jun 7, 1996
• Grant date: Jul 20, 1999
• Expiry date: Jun 7, 2016

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K6/90
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A catalyst/cross-linking agent composition, containing at least one PA1 a) vinyltrialkoxysilane as cross-linking agent, PA1 b) dialkyltin oxide as catalyst, PA1 c) optional organic acid for the control of the reaction time, PA1 d) optional inert solvent, and PA1 e) optional dye or colored pigment, is especially useful for condensation/cross-linking of polysiloxanes, such as OH-endstopped polydimethylsiloxane, in making moldings. Especially useful for impression taking in the dental field.