An aqueous polymer composition including a plurality of comb copolymer particles is disclosed. The comb copolymer particles contain comb copolymer having a polymer backbone with at least one attached graft segment. The polymer backbone and the at least one graft segment have select compositional ranges and select glass transition temperature ranges. Further, the comb copolymer contains as a polymerized unit at least one select monomer such as, aldehyde reactive group-containing monomer or certain styrenic monomers. The aqueous polymer composition of the present invention is useful for preparing coatings having one or more improved properties such as dirt pickup resistance, gloss, gloss retention, alkyd adhesion, and tint retention. A method for forming a coated substrate from the aqueous polymer composition of this invention is also provided.
本发明公开了一种含
水聚合物组合物,其中包括多个梳状共聚物颗粒。梳状共聚物颗粒含有梳状共聚物,梳状共聚物具有聚合物骨架和至少一个连接接枝段。聚合物骨架和至少一个接枝段具有选定的组成范围和选定的
玻璃化转变温度范围。此外,梳状共聚物含有至少一种选择性单体作为聚合单元,例如含醛活性基团的单体或某些
苯乙烯类单体。本发明的含
水聚合物组合物可用于制备具有一种或多种改良特性的涂料,例如耐污性、光泽度、光泽保持力、醇酸
树脂附着力和色调保持力。此外,还提供了一种用本发明的
水性聚合物组合物形成涂层基材的方法。