Silicone-polyester and silicone-ester powder coating composition.

摘要

New siloxane-esters, useful as powder coating resins, are prepared by random condensation polymerization of a hindered glycol and a hydroxy functional silicone having about two Si(R)OH groups per molecule wherein R is lower alkyl or phenyl groups and the remaining silicone valences form ring-structured siloxanes. Improved powder properties, including tack temperatures of 150°F to 220°F, are believed to result in part from the hindered glycols especially those having carboxylic functionality.