Patent Number: 6,251,314

Title: Process for the preparation of microencapsulated polymers

Abstract: The present invention relates to a process for the preparation of microencapsulated polymers having a high surface smoothness, a soluble fraction of less than 6%, and a swelling index of between 1.3 and 9 by polymerizing a microencapsulated monomer mixture suspended in an aqueous phase containing at least one hydroxyaromatic compound as polymerization inhibitor, wherein the microencapsulated monomer mixture contains (a) 34 to 99.7% by weight of a monomer having one polymerizable C.dbd.C double bond, (b) 0.1 to 15% by weight of a crosslinking agent having at least 2 polymerizable C.dbd.C double bonds, (c) 0.2 to 1.0% by weight of at least one aliphatic peroxyester as polymerization initiator, and (d) 0 to 50% by weight of additives, the percentages being based on the sum of the components (a) to (c).

Inventors: Halle; Olaf (Koln, DE), Struver; Werner (Leverkusen, DE), Harrison; David Bryan (Leverkusen, DE), Podszun; Wolfgang (Koln, DE)

Assignee: Bayer Aktiengesellschaft

International Classification: C08F 2/12 (20060101); C08F 2/18 (20060101); B01J 013/02 (); C08K 005/13 ()

Expiration Date: 06/26/2018