Method of manufacturing monodisperse poly (meth) acrylate particles

US5458975A · kind A · utility

Assignee

• Roehm GmbH Chemische Fabrik · DE

Inventors

• Werner Siol · Pfungstadt, DE
• Wilhelm Wopker · Emmelshausen, DE
• Erwin Felger · Darmstadt, DE
• Markus Parusel · Messel, DE

Key dates

• Filing date: Dec 1, 1994
• Grant date: Oct 17, 1995
• Expiry date: Dec 1, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method of manufacturing monodisperse poly(meth)acrylates by the method of precipitation polymerization, comprising polymerizing PA0 i) a monomer mixture comprising at least 60 wt. % of monomer of formula I ##STR1## where R represents hydrogen or methyl; and PA1 R.sub.1 represents a C.sub.1-8 alkyl group, a C.sub.6-24 aryl group, a C.sub.1-8 alkyl substituted aryl group or an aralkyl group; PA0 ii) 0.1-10 wt. % based on the weight of the monomer mixture of a block copolymer having polystyrene components; and PA0 iii) 0.02-2 wt. % based on the weight of the monomer mixture of a percarbonic acid ester; in a halogen free solvent comprising 70 to 100 wt. % of cyclohexane.