Filler-containing bead polymers

US4389507A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Podszun · Neunburg vorm Wald, DE
• Carlhans Suling · Odenthal, DE
• Michael Walkowiak · Leverkusen, DE
• Hans-Hermann Schulz · Leichlingen, DE

Key dates

• Filing date: Sep 2, 1981
• Grant date: Jun 21, 1983
• Expiry date: Sep 2, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F292/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Polymer beads having an average bead diameter of from 5 to 500 .mu., consisting of an inorganic fine-particled filler and polymerized (meth)acrylic acid esters, and a process for their production, wherein a mixture of monomer and, optionally, polymer which is soluble in the monomer, which has a viscosity of from 0.1 to 10 Pa.s, measured at the dispersion temperature, and filler is suspended in an aqueous medium in the presence of dispersants and is polymerized.