The invention relates to levelling agents for surface coatings having a weight-average molecular weight of from 5000 to 100,000. The levelling agent is a branched polymer comprising a free-radically or ionically polymerized base molecule into which macromonomeric units containing at one end a monomeric unit which has an ethylenically unsaturated bond and possessing a weight-average molecular weight of from 1000 to 30,000 have been incorporated by free-radical or ionic copolymerization, the weight fraction of the macromonomeric units, based on the total weight of the branched polymer, being from 1 to 60% by weight. The invention further relates to the use of appropriate polymers as levelling agents for coating formulations and to coating formulations comprising the levelling agents of the invention.
本发明涉及用于表面涂层的匀染剂,其重量平均分子量为 5000 至 100000。匀染剂是一种支化聚合物,包括自由基分子或离子聚合基分子,通过自由基或离子共聚合将一端含有具有
乙烯不饱和键的单体单元且具有 1000 至 30000 重量平均分子量的大单体单元加入其中,大单体单元的重量分数为支化聚合物总重量的 1 至 60%。本发明还涉及使用适当的聚合物作为涂料配方的流平剂,以及包含本发明流平剂的涂料配方。