Crosslinked silicone-vinyl polymer systems

US4412039A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Heinrich Alberts
• Hans Friemann · Cologne, DE
• Hans-Heinrich Moretto · Cologne, DE
• Hans Sattlegger · Odenthal, DE
• Fritz Mietzsch · Cologne, DE

Key dates

• Filing date: Jul 17, 1981
• Grant date: Oct 25, 1983
• Expiry date: Jul 17, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F255/026
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A co-grafted polymer dispersion comprising blocks of an organopolysiloxane with OH functional groups, blocks of an ethylene/vinyl ester copolymer containing about 5 to 99% by weight of incorporated vinyl ester, and blocks of vinyl monomer units polymerized in the presence of mixtures of the organopolysiloxane and ethylene/vinyl ester copolymer, the organopolysiloxane and ethylene/vinyl ester copolymer blocks being linked via vinyl polymer bridges. The dispersions mixed with suitable catalysts, can cure under the influence of atmospheric moisture to elastic tack-free rubbers suitable as sealants.