Core/shell copolymer dispersion whose shell comprises hydrolyzable organosilicon comonomers

US5708093A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Thomas Bastelberger · Emmerting, DE
• Hermann Lutz · Emmerting, DE
• Peter Heiling · Burghausen, DE

Key dates

• Filing date: Oct 2, 1995
• Grant date: Jan 13, 1998
• Expiry date: Oct 2, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/902
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to core/shell copolymer dispersions whose shell comprises hydrolyzable organosilicon comonomers, the shell consisting of a copolymer comprising, PA1 a) from 70 to 95% by weight of acrylic and/or methacrylic C.sub.1 to C.sub.10 alkyl esters of which from 20 to 80% by weight, based on the overall weight of a), have a water-solubility of not more than 2 g/l and from 80 to 20% by weight, based on the overall weight of a), have a water-solubility of at least 10 g/l, PA1 b) from 5 to 25% by weight of one or more ethylenically unsaturated, functional and water-soluble monomers including a proportion of from 25 to 100% by weight, based on the overall weight of b), of unsaturated carboxylic acids, and PA1 c) from 0.01 to 10% by weight of one or more olefinically unsaturated, hydrolyzable silicon compounds of the general formula R.sup.1 --Si(OR.sup.2).sub.3, and whose core, making up a proportion of from 75 to 98% by weight of the overall weight of the core/shell copolymer, consists of a polymer comprising PA1 d) one or more comonomers from the group consisting of vinyl esters, acrylic and/or methacrylic esters, vinyl chloride, vinylaromatic compounds and ethylene.