Polysiloxane molding compositions

US4434283A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans Sattlegger · Odenthal, DE
• Karl Schnurrbusch · Leverkusen, DE
• Bruno Degen · Much, DE
• Theo Achtenberg · Leverkusen, DE

Key dates

• Filing date: Feb 8, 1982
• Grant date: Feb 28, 1984
• Expiry date: Feb 8, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/70
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a polysiloxane molding composition which in the presence of water crosslinks to an elastomer and which comprises PA1 (A) an .alpha.,.omega.-dihydroxyorganopolysiloxane with a viscosity of about 500 to 2,000,000 cP, PA1 (B) a crosslinking agent, and PA1 (C) a reinforcing filler, the improvement which comprises including therein in about 0.1 to 10% by weight a silicon compound containing at least 3 alkoxy groups and preferably of the formula EQU R.sub.n Si(Alkoxy).sub.4-n in which PA1 R is alkyl with 1 to 10 carbon atoms, PA1 Alkoxy has 1 to 4 carbon atoms, and PA1 n is 0 or 1, whereby the elastomer ultimately produced exhibits improved direct adhesion to various substrates.