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专利名称：Coating type, chromate conversion coating
composition
发明人：Sobata, Tamotsu,Ushio, Akira申请号：EP88203022.4申请日：19881227公开号：EP0322984A2公开日：190705
摘要：A coating type chromate conversion coating composition comprising as
essential components (A) 5∼500g/l as solid of an aqueous emulsion of polymer particleshaving an average grain diameter of 0.1∼3µm which are crosslinked or whose
glasstransition point is within a range of 15°∼110°C, the said polymer being prepared byan emulsion polymerization of at least oneα,β-ethylenically unsaturated monomer in thepresence of particular protective colloid defined in the specification, (B) 2∼250g/l as solidof a polyacrylic acid or acrylic copolymer, (C) 5∼500g/l as Cr of a water soluble chromiumcompound, 30∼50 wt% of the total chromium contained being trivalent chromium, and(D) 5∼1,000g/l of metal oxide microparticles having an average diameter of 0.1 to 20µm,selected from MnO, TiO₂ Fe₂O₃, Fe₃O₄, CrO₃, Al₂O₃, ZnO, PbO₂ and CuO, the solid weightratio of (A) to (C) being 10:1 to 1:5, the weight ratio of (D) to (C) being 5:1 to 1:10 and pHof the composition being 1∼3. The present coating composition isspecifically useful forthe pre-treatment of metal substrate for coating, giving excellent corrosion-resistanceand coating adhesive properties etc.
申请人：Nippon Paint Co., Ltd.
地址：1-2 Ohyodo-Kita 2-chome Ohyodo-ku Osaka-shi Osaka JP
国籍：JP
代理机构：Smulders, Theodorus A.H.J., Ir.
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