Process for the preparation of crosslinked polymers

US5834524A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Robert Bloodworth · Neunburg vorm Wald, DE
• Werner Struver · Leverkusen, DE
• Holger Lutjens · Cologne, DE
• Olaf Halle
• Wolfgang Podszun · Neunburg vorm Wald, DE

Key dates

• Filing date: Aug 22, 1997
• Grant date: Nov 10, 1998
• Expiry date: Aug 22, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F257/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Monodisperse crosslinked polymers prepared by seed/feed polymerization have less tendency to tack when a microencapsulated monodisperse crosslinked polymer has been used as seed. Compared with the seed used, the seed/feed polymer obtained exhibits substantially less broadening of the particle size distribution when microencapsulated seed has been used.