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AQUEOUS COATING COMPOSITION, METHOD OF MAKING SAME AND METHOD OF APPLYING MULTIPLE PAINT COATS OF THAT COATING COMPOSITION
AQUEOUS COATING COMPOSITION, METHOD OF MAKING SAME AND METHOD OF APPLYING MULTIPLE PAINT COATS OF THAT COATING COMPOSITION
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机译:水性涂料组合物,其制备方法和应用该涂料组合物的多涂料的方法
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摘要
Aqueous coating compound containing a polyurethane resin-based binder of I) from 60 to 100% by weight of a mixture of A) from 5-95% by weight of one or more self-emulsifying polyurethane resins in aqueous dispersion having a number average molar mass (Mn) of from 30000 to 300000 and containing carboxyl groups corresponding to an acid number of from 5 to 50, obtainable from a water dispersible polyurethane prepolymer having more than one free isocyanate group per molecule, by chain lengthening with water and B) from 95 to 5% by weight of one or more acrylated polyesters and/or acrylated polyurethanes having an acid number of from 5 to 50 in aqueous dispersion and II) from 0 to 40% by weight of one or more formaldehyde condensation resins and/or blocked polyisocyanates, the percentages by weight being based in each case on the resin solids content. The coating compounds are suitable in particular as basic lacquers for multi-coat lacquering. Coatings with good weather resistance are produced from them.
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