A composition for peelable coating, which composition exhibits excellent properties such as film-formability and water resistance and can be dried at ambient temperature without any particular heating, to thereby provide excellent coating performance. The composition contains a core/shell copolymer including an acrylic copolymer portion A having a high glass transition temperature of 30°C-70°C and an acrylic copolymer portion B having a low glass transition temperature of 5°C to -30°C and being formed through multi-step polymerization. The core/shell copolymer is made up of 5-40 wt.% of the acrylic copolymer portion A and 60-95 wt.% of the acrylic copolymer portion B, on the basis of the total amount of the portion A and the portion B. The acrylic copolymer portion A and the acrylic copolymer portion B contain the same hard-polymer-providing monomer unit and soft-polymer-providing monomer unit. Each copolymer portion contains a hard-polymer-providing monomer unit and a soft-polymer-providing monomer unit in a total amount of 70 wt.% or more.
一种用于可剥离涂料的组合物,该组合物具有优异的成膜性和耐
水性等性能,无需特别加热即可在环境温度下干燥,从而提供优异的涂料性能。该组合物包含一种芯/壳共聚物,其中
丙烯酸共聚物 A 部分具有 30°C 至 70°C 的高
玻璃化转变温度,
丙烯酸共聚物 B 部分具有 5°C 至 -30°C 的低
玻璃化转变温度,是通过多步聚合形成的。按 A 部分和 B 部分的总量计算,芯/壳共聚物由 5-40 重量百分比的
丙烯酸共聚物 A 部分和 60-95 重量百分比的
丙烯酸共聚物 B 部分组成。
丙烯酸共聚物 A 部分和
丙烯酸共聚物 B 部分含有相同的硬聚合物单体单元和软聚合物单体单元。每种共聚物部分都含有提供硬聚合物的单体单元和提供软聚合物的单体单元,总含量为 70 wt.%或以上。