| 摘要 |
<p>Advanced epoxy resin compositions provide improvements in processability, filler acceptability and rheology through the employment of epoxy resins with reduced viscosity per unit epoxide equivalent weight. The compositions are useful as powder coatings on metallic substrates. The products are obtained through the polymerization in the presence of a polymerization catalyst of a monomer mixture containing at least one vinyl aromatic monomer such as styrene, an epoxide group - reactive functionality and polymerizable ethylenically unsaturated group - containing compound such as methacrylic acid, and optionally a hydroxyalkyl(meth)acrylate or alkyl(meth)acrylic such as hydroxyethyl acrylate. The monomer mixture is polymerized in the presence of a reaction product of a digllycidyl ether of a dihydric phenol such as bisphenol A and an epoxide group - reactive functionality and polymerizable ethylenically unsaturated group - containing compound such as methacrylic acid. The resulting polymerization product is advanced in the presence of an advancement catalyst with a dihydric phenol such as bisphenol A.</p> |
