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    • 40. 发明授权
    • Powder coating composition
    • 粉末涂料组合物
    • US4073775A
    • 1978-02-14
    • US693913
    • 1976-06-08
    • Shunji MatsuoKiichiro SasaguriKatsuyuki NakamuraYoshio MatsumotoMikio Sato
    • Shunji MatsuoKiichiro SasaguriKatsuyuki NakamuraYoshio MatsumotoMikio Sato
    • C09D5/03C08G59/32C08G59/62C09D5/46C09D125/14C09D133/06C09D133/20C08G51/84C08F24/00C08G45/00C08G45/04
    • C09D133/068C08G59/3209C08G59/625C08K5/10C08K5/13C09D125/14C09D133/20
    • A thermosetting powder coating composition having good handling characteristics and capable of being baked under relatively mild conditions and providing a coating having practically satisfactory properties. This coating composition is prepared by incorporating in 100 parts by weight of an epoxy group-containing acrylic or methacrylic copolymer having a glass transition point of 30.degree. to 90.degree. C. and a weight average molecular weight of 2,500 to 30,000, said copolymer consisting of 3 to 35% by weight of acrylate or methacrylate monomer units and 97 to 65% by weight of ethylenically unsaturated monomer units, 3 to 40 parts by weight of a specific diphenol having at its both terminals hydroxybenzoic acid ester structures as represented by the general formula: ##STR1## wherein R.sub.3 stands for a hydrocarbon radical having 2 to 20 carbon atoms or a linking group containing, at least at its both terminals, hydrocarbon radicals and in its main chain at least one member selected from the group consisting of an ether linkage, ester linkage, urethane linkage and amide linkage, and having totally 4 to 20 carbon atoms. Especially good results are obtained when a specific phenol compound containing in the molecule one phenolic hydroxyl group and either one carboxyl group or one hydroxyl group, or a specific benzoic acid compound containing in the molecule two carboxylic acid groups are further incorporated in this powder coating composition.
    • 一种热处理粉末涂料组合物,具有良好的处理特性并且能够在相对温和的条件下进行烘烤并提供具有实际令人满意的性能的涂层。 该涂料组合物通过在100重量份的玻璃化转变温度为30-90℃,重均分子量为2500至30,000的环氧基的丙烯酸或甲基丙烯酸共聚物中加入,所述共聚物由 3至35重量%的丙烯酸酯或甲基丙烯酸酯单体单元和97至65重量%的烯键式不饱和单体单元,3至40重量份具有其两末端的羟基苯甲酸酯结构的特定二酚,由通式 :其中R 3表示具有2〜20个碳原子的烃基或至少在其两个末端含有烃基的连接基团,并且在其主链中至少含有一个选自醚键 ,酯键,氨基甲酸酯键和酰胺键,并且具有总共4至20个碳原子。 当在分子中含有一个酚羟基和一个羧基或一个羟基的特定酚化合物或在分子中含有两个羧酸基团的特定苯甲酸化合物进一步掺入该粉末涂料组合物中时,可获得特别好的结果 。