COATING COMPOSITION, PROCESS FOR PREPARING THE COMPOSITION, AND PROCESS FOR PREPARING DISPERSION OF INORGANIC OXIDE SOL
申请人:NOF CORPORATION
公开号:EP0768351A1
公开(公告)日:1997-04-16
A coating composition which comprises: (A) a resin having a glass transition temperature of 50 to 120 °C., a number average molecular weight of 2,000 to 100,000, a hydroxyl value of 50 to 150 mgKOH/g and an acid value of 1 to 25 mgKOH/g, which is produced by copolymerizing 10 to 90 percent by weight of (a) a (meth) acrylic acid ester of an alkyl alcohol of 1 to 12 carbon atoms, 10 to 50 percent by weight of (b) a polymerizable double bond-containing and hydroxyl group-containing monomer, 0.1 to 10 percent by weight of (c) a polymerizable double bond-containing and carboxyl group-containing monomer, 0 to 20 percent by weight of (d) styrene, 0 to 20 percent by weight of (e) acrylonitrile and 0 to 10 percent by weight of (f) other polymerizable double bond-containing monomer, (B) at least one compound selected from the group consisting of a polyisocyanate compound having two or more isocyanate groups and/or blocked isocyanate groups in the molecule and an aminoplast resin, (C) a dispersing component of at least one inorganic oxide sol selected from the group consisting of an aluminium oxide sol, a silica sol, a zirconium oxide sol and an antimony oxide sol, wherein an amount of a nonvolatile matter of ingredient (C) is 5 to 60percent by weight based on a total nonvolatile matter of ingredient (A), ingredient (B) and ingredient (C), and a process for preparing a coating composition which comprises: preparing the resin (A), adding the dispersing component of an inorganic oxide sol (C) into a polymerization liquid containing the resin (A) after finishing of the copolymerization of the resin (A) to produce a organic-inorganic composite, and then mixing the organic-inorganic composite and ingredient (b). The coating compositions give the cured films having excellent weathering resistance, light resistance, stain resistance, stain-removing property, chemical resistance, moisture resistance and appearance and is excellent in environment friendliness and safety.
一种涂料组合物,它包括: (A) 一种树脂,其玻璃化温度为 50 至 120 °C、平均分子量为 2,000 至 100,000,羟值为 50 至 150 mgKOH/g,酸值为 1 至 25 mgKOH/g,它是由 10%至 90%(重量百分比)的(a) 1 至 12 个碳原子的烷基醇的(甲基)丙烯酸酯、10%至 50%(重量百分比)的(b) 可聚合的含双键和羟基的单体、0.1%至 10%(按重量计)的(c)可聚合的含双键和含羧基的单体,0%至 20%(按重量计)的(d)苯乙烯,0%至 20%(按重量计)的(e)丙烯腈和 0%至 10%(按重量计)的(f)其他可聚合的含双键的单体,(B)至少一种选自分子中含有两个或两个以上异氰酸酯基团和/或封端异氰酸酯基团的多异氰酸酯化合物和氨基树脂的化合物、(C) 至少一种无机氧化物溶胶的分散组分,该溶胶选自由氧化铝溶胶、二氧化硅溶胶、氧化锆溶胶和氧化锑溶胶组成的组,其中成分(C)的不挥发物的量为成分(A)、成分(B)和成分(C)的总不挥发物重量的 5%至 60%,以及制备涂料组合物的工艺,该工艺包括:制备树脂(A),在完成树脂(A)的共聚后,将无机氧化物溶胶(C)的分散组分加入含有树脂(A)的聚合液中,生成有机-无机复合材料,然后将有机-无机复合材料和配料(B)混合。这种涂料组合物固化后的薄膜具有优异的耐候性、耐光性、耐污性、去污性、耐化学性、防潮性和外观,而且在环境友好性和安全性方面也非常出色。