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PROCESS FOR THE PRODUCTION OF A MULTI-LAYER COATING, WATER-DILUTABLE COATING COMPOSITIONS, WATER-DILUTABLE EMULSION POLYMERS AND PROCESS FOR THE PRODUCTION OF WATER-DILUTABLE EMULSION POLYMERS
PROCESS FOR THE PRODUCTION OF A MULTI-LAYER COATING, WATER-DILUTABLE COATING COMPOSITIONS, WATER-DILUTABLE EMULSION POLYMERS AND PROCESS FOR THE PRODUCTION OF WATER-DILUTABLE EMULSION POLYMERS
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机译:多层涂料,水可稀释涂料组合物的制备方法,水可稀释的乳液聚合物和水可稀释的乳液聚合物的制备方法
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摘要
The invention concerns a process for the production of multi-layer coatings, which uses a pigmented aqueous base coating composition containing a water-dilutable emulsion polymer as the film-forming material. The water-dilutable emulsion polymer is produced by two-stage emulsion polymerization. In the first stage, a polymer with a glass transition temperature (TG1?) of +30 to +110C is produced. In the second stage, a monomer mixture which, if polymerized alone, would give a polymer with a glass transition temperature (TG2?) of -60 to +20C is polymerized in the presence of the polymer produced in the first stage. The hydroxyl number of the emulsion polymer lies between 2 and 100.
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