THERMOSETTING ACRYLIC POWDER COATING COMPOSITION OF A POLYBLEND OF ACRYLIC POLYMER HAVING A HIGH GLASS TRANSITION TEMPERATURE AND AN ACRYLIC POLYMER HAVING A LOW GLASS TRANSITION TEMPERATURE AND A CROSS-LINKING AGENT

摘要

The thermosetting acrylic polymer powder coating composition comprises finely divided particles that have a diameter of 1-100 microns wherein the powder particles are a blend of A. a hard acrylic polymer of methyl methacrylate, an alkyl methacrylate or an alkyl acrylate having 2-14 carbon atoms in the alkyl groups, a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate that have 2-4 carbon atoms in the alkyl groups; the acrylic polymer has a number average molecular weight of 3,000-10,000 and glass transition temperature of about 75 DEG to 90 DEG C.