| 摘要 |
<p>There are prepared powder enamels or varnishes containing an acrylic resin in combination with an aliphatic dicarboxylic acid. The acrylic resin has glycidyl groups and is prepared by bulk polymerizing a mixture of: (a) methyl methacrylate, 20 to 70 weight %; (b) at least one ester of acrylic acid or methacrylic acid with a monohydric alcohol, whose homopolymer has a glass transition temperature below 40 DEG C., 10 to 40 weight %; (c) glycidyl acrylate or glycidyl methacrylate, 10 to 25 weight %; and (d) an additional monomer copolymerizable with (a), (b) and (c), 0 to 50 weight %; in the presence of a radical (free radical) catalyst and in the presence of, based on the weight of the monomer mixture of 0.1 to 3.0 weight percent of at least one ester of phosphorous acid having the formula: <IMAGE> where R1 is hydrogen or a saturated aliphatic group with 1 to 16 carbon atoms, an aryl group with 6 to 10 carbon atoms, an alkyl substituted aryl with 1 to 12 carbon atoms in the alkyl, or an aralkyl group with 7 to 18 carbon atoms and R2 and R3 are the same or different saturated aliphatic groups with 1 to 16 carbon atoms, aryl groups with 6 to 10 carbon atoms, alkyl substituted aryl with 1 to 12 carbon atoms in the alkyl, or aralkyl groups with 7 to 18 carbon atoms.</p> |
