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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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