Hydrophobic pigments and fillers for incorporation in synthetic resins

US4810305A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rolf Braun · Offenbach, DE
• Peter Panek · Castlecomer, IE
• Horst Bornefeld · Burscheid, DE
• Dieter Rade · Krefeld, DE
• Wolfgang Ritter · Düsseldorf, DE

Key dates

• Filing date: Aug 4, 1987
• Grant date: Mar 7, 1989
• Expiry date: Aug 4, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/42
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A modified hydrophobic colored or magnetic pigment or filler comprising a hydrophobic pigment or filler containing from 0.05 to 10% by weight, based on the weight of the pigment or filler, of an organopolysiloxane corresponding to the formula ##STR1## wherein x=0 to 500, PA0 y=5 to 500, PA0 z=5 to 500, PA0 R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 denote, independently of one another, a saturated and/or unsaturated, unbranched or branched alkyl group haviang 1 to 4 carbon atoms and/or an aryl group having 6 to 9 carbon atoms, said aryl group being unsubstituted or alkyl substituted, PA0 R.sup.7 is a straight chained or branched alkyl group having 6 to 18 carbon atoms and R.sup.7 and H each amount to at least 3% of the number of groups attached to Si.