Previously cross-linked silicone elastomer particles with an organopolymer shell as a constituent for formulating aqueous coating compositions

US6147142A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Michael Geck · Burghausen, DE
• Walter Goeblmeier · Wurmannsquick, DE
• Bernward Deubzer · Burghausen, DE
• Ekkehard Patrick · Altötting, DE
• Helmut Oswaldbauer · Stubenberg, DE

Key dates

• Filing date: Sep 28, 1998
• Grant date: Nov 14, 2000
• Expiry date: Sep 28, 2018

Classification

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

Abstract

Previously cross-linked silicone elastomer particles with an organic-polymer shell are used as constituents for formulating aqueous coating compositions based on water-soluble or water-dilutable binders. The silicone elastomer particles contain: (a) 5 to 95% by weight, with respect to the total weight of the copolymer, of a nuclear polymer of general formula (R.sub.2 SiO.sub.2/2).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.z, in which x=5 to 99.5% by mole, y=0.5 to 95% by mole, z=0 to 30% by mole, and (b) 5 to 95% by weight, with respect to the total weight of the copolymer of a shell made of an organopolymer from mono- or poly-ethylenically unsaturated monomers; and R stands for the same or different monovalent alkyl or alkenyl radicals with 1 to 6 carbon atoms, aryl radicals or substituted hydrocarbon radicals.