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公开(公告)号：US5534082A
公开(公告)日：1996-07-09
申请号：US429431
申请日：1995-04-21
摘要： Heating an aqueous mixture of a fluoroacid such as H.sub.2 TiF.sub.6 and an oxide, hydroxide, and/or carbonate such as silica produces a clear mixture with long term stability against settling of any solid phase, even when the oxide, hydroxide, or carbonate phase before heating was a dispersed solid with sufficiently large particles to scatter light and make the mixture before heating cloudy. The clear mixture produced by heating can either be mixed with water soluble and/or water dispersible polymers, for example with dispersed polymers of the diglycidyl ether of bisphenol-A or an acrylic acid polymer, or with soluble hexavalent and/or trivalent chromium, to produce a composition that improves the corrosion resistance of metals treated with the composition, especially after subsequent painting. Another composition that improves the corrosion resistance of metals after contact with them is an aqueous solution of a mixture of: (A') a water soluble or dispersible polymer having at least one --OH group per polymer molecule selected from the group consisting of polyvinyl alcohol, polyethylene glycol, modified starch, and mixtures thereof, and (B') polymers and copolymers of acrylic and methacrylic acid and their salts.
摘要翻译： 加热含氟酸如H 2 TiF 6和氧化物，氢氧化物和/或碳酸盐如二氧化硅的水性混合物，即使在加热之前的氧化物，氢氧化物或碳酸盐相时也会产生具有长期稳定性的任何固相沉淀的透明混合物 是具有足够大的颗粒的分散的固体，以散射光并使混合物在加热混浊之前。 通过加热制备的透明混合物可以与水溶性和/或水分散性聚合物混合，例如与双酚A的二缩水甘油醚或丙烯酸聚合物的分散的聚合物或可溶的六价和/或三价铬混合到 产生提高用组合物处理的金属的耐腐蚀性的组合物，特别是在随后的涂漆之后。 提高金属与其接触后的耐腐蚀性的另一种组合物是：（A'）水溶性或分散性聚合物的水溶液，每个聚合物分子具有至少一个-OH基团，该聚合物分子选自聚乙烯醇 ，聚乙二醇，改性淀粉及其混合物，和（B'）丙烯酸和甲基丙烯酸及其盐的聚合物和共聚物。
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2.发明授权Reducing or avoiding surface irregularities in electrophoretic painting of phosphated metal surfaces 失效减少或避免磷酸化金属表面的电泳涂装中的表面不规则
公开(公告)号：US5851371A
公开(公告)日：1998-12-22
申请号：US874238
申请日：1997-06-16
摘要： The phenomenon of "mapping" (surface defects) after electrophoretic painting over phosphate conversion coatings passivated with hexavalent chromium containing passivating compositions can be avoided or reduced by keeping the surface being treated constantly wet from the time it is conversion coated until it is electrophoretically painted, by preceding the passivating step by treatment with an aqueous liquid treatment composition comprising at least one of the following components: (A) a water soluble and/or water dispersible polymer with a weight average molecular weight of at least 500; (B) fluorometallic acids and anions thereof, the molecules of which consist of (i) at least one atom of boron, silicon, zirconium, iron, aluminum, or titanium, (ii) at least four fluorine atoms, and, optionally, (iii) one or more atoms of oxygen, hydrogen, or both; (C) zirconium salts of ethylenediamine tetraacetic acid; and (D) alkali metal and ammonium zirconyl carboxylates and carbonates; or by replacing the chromium containing passivating composition with an aqueous liquid treatment composition of the same type as described above.
摘要翻译： 在用含六价铬的钝化组合物钝化的磷酸盐转化涂层上进行电泳涂装后的“映射”（表面缺陷）的现象可以通过将表面经过转化涂覆的时间一直保持湿润直至电泳涂布来避免或减少， 通过用包含以下组分中的至少一种的水性液体处理组合物进行处理之前进行钝化步骤：（A）重均分子量为至少500的水溶性和/或水分散性聚合物; （B）含氟金属酸和阴离子，其分子由（i）至少一个硼，硅，锆，铁，铝或钛原子组成，（ii）至少四个氟原子，和任选地（ iii）一个或多个氧，氢或两者的原子; （C）乙二胺四乙酸锆盐; 和（D）碱金属和铵锆羧酸盐和碳酸盐; 或者用与上述相同类型的水性液体处理组合物代替含铬钝化组合物。
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