Water-soluble graft polymers

US5739212A · kind A · utility

Assignee

• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Konrad Wutz · Trostberg, DE
• Josef Weichmann · Pleiskirchen, DE
• Alfred Kern · Schneeberg, DE
• Hans-Gunter Rosenbauer · Trostberg, DE

Key dates

• Filing date: Oct 19, 1995
• Grant date: Apr 14, 1998
• Expiry date: Oct 19, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/408
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Water-soluble graft polymers are described which have been produced by PA1 a) radical grafting of a polyalkylene oxide of the general formula I ##STR1## in which R.sup.1 =--H, --C.sub.n H.sub.2n+1, --C.sub.6 H.sub.4 --C.sub.n H.sub.2n+1, ##STR2## --(CH--R.sup.2).sub.m NHR.sup.2, --(CH--R.sup.2).sub.m OH, --(CH--R.sup.2).sub.m --COOH, --CO--R.sup.5 PA1 R.sup.2 =--H, --CH.sub.3, --C.sub.2 H.sub.5 PA1 R.sup.3 =--H, --C.sub.n H.sub.2n+1, --C.sub.m H.sub.2m --SO.sub.3 Na, --(CH--R.sup.2).sub.m NHR.sup.2, --(CH--R.sup.2).sub.m OH, --(CH--R.sup.2).sub.m --COOH, --CO--R.sup.5 PA1 R.sup.4 =--H, --(CH--R.sup.2).sub.m --COOH, --CO--R.sup.5 PA1 R.sup.5 =--C.sub.m H.sub.2m+1, --C.sub.6 H.sub.5, --(CH--R.sup.2).sub.m --COOH, --C.sub.6 H.sub.4 --COOH n denotes 1-18, m denotes 1-5, x denotes 2-200, y denotes 0 or 1 with an ethylenically unsaturated mono or dicarboxylic acid or their anhydride and subsequently PA1 b) derivatising with a primary or secondary amine and/or alcohol. These graft polymers are suitable as dispersants for inorganic binding agents containing water such as e.g. cement, gypsum, anhydrite.