Abstract: Light-stabilized polymer microparticles, which contain at least one light stabilizer, and processes for the preparation of these microparticles by polymerization of suitable monomers, at least a part of the polymerization being carried out in the presence of at least one light stabilizer, are described. The polymer microparticles can be used in coating compositions which comprise a disperse phase containing these particles and a liquid continuous phase.Coatings and finishes based on the compositions according to the invention are distinguished by improved weathering resistance, in particular by a high light stability.
Type:
Grant
Filed:
October 18, 1993
Date of Patent:
December 19, 1995
Assignee:
Ciba-Geigy Corporation
Inventors:
Godwin Berner, Manfred Rembold, Jean Rody, Mario Slongo