Polymer compositions useful as flow aids, and coating compositions containing the polymer compositions

摘要

The present invention relates to polymer compositions which are useful particularly as flow aids in coating resin formulations. In one embodiment, the polymer composition is prepared by reacting (A) at least one acrylic ester, vinyl monomer or mixtures thereof, provided the acrylic ester is not a hydroxyalkyl acrylate, (B) at least one monoester of an alpha-beta unsaturated dicarboxylic acid, and (C) at least one hydroxy-containing compound selected from hydroxyalkyl acrylates and compounds characterized by the formula HOR*SH(IIIA) wherein R* is a hydrocarbylene group containing from 2 to about 10 carbon atoms, or mixtures thereof. The invention also relates to improved coating compositions comprising a coating resin and a flow-improving amount of a polymer composition derived from (A) at least one acrylic ester (not a hydroxyalkyl acrylate) vinyl monomer or mixtures thereof, (B) at least one alpha-beta unsaturated carboxylic acid compound containing only one carboxylic acid group, and (C) at least one hydroxyalkyl acrylate. The coating compositions exhibit improved stain-resistance and recoatability.