專利名稱：Coating type, chromate conversion coating

composition

發(fā)明人：Sobata, Tamotsu,Ushio, Akira申請(qǐng)?zhí)枺篍P88203022.4申請(qǐng)日：19881227公開(kāi)號(hào)：EP0322984A2公開(kāi)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, TiO? Fe?O?, Fe?O?, CrO?, Al?O?, ZnO, PbO? 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.

申請(qǐng)人：Nippon Paint Co., Ltd.

地址：1-2 Ohyodo-Kita 2-chome Ohyodo-ku Osaka-shi Osaka JP

國(guó)籍：JP

代理機(jī)構(gòu)：Smulders, Theodorus A.H.J., Ir.

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