Unsaturated sulfonic acid polymers as spray drying assistants

US5604272A · 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: May 25, 1995
• Grant date: Feb 18, 1997
• Expiry date: May 25, 2015

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.5 -alkyl and X is O or NH, and PA0 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.