Composition of a redispersible spray dried unsaturated sulfonic acid polymer powder and a mineral binder

US5726224A · kind A · utility

Assignee

• BASF SE

Inventors

• Erich Penzel · Heidelberg, DE
• Gernot Franzmann · Worms, DE
• Maximilian Angel · Mutterstadt, DE
• Joachim Pakusch · Ludwigshafen, DE
• Bernhard Schuler · Austin, US

Key dates

• Filing date: Sep 11, 1996
• Grant date: Mar 10, 1998
• Expiry date: Sep 11, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L33/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polymers I comprising from 15 to 80% by weight of monomers of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each C.sub.1 -C.sub.3 -alkyl, R.sup.4 is C.sub.1 -C.sub.3 -alkyl and X is O or NH, and from 20 to 85% by weight of other monomers capable of undergoing free radical copolymerization are used as assistants in the spray drying of aqueous dispersions of polymers II which differ from the polymers I. The resultant powders are added to mineral binders.