Provided is a polymer capable of providing a coating film that has good initial adhesiveness to a base material and good adhesiveness thereto after a pressure cooker test, and has excellent abrasion resistance as determined by a falling sand abrasion test. The polymer includes a perhaloolefin unit, a vinyl ester unit that contains neither a hydroxy group nor an aromatic ring; and a hydroxy group-containing monomer unit. The polymer has a hydroxyl value of 110 mgKOH/g or greater.
本发明提供了一种聚合物,它能够提供一种涂膜,该涂膜与基底材料具有良好的初始粘合性,在高压锅试验后与基底材料具有良好的粘合性,并且通过落砂磨损试验确定具有优异的耐磨性。该聚合物包括一个全卤代烯烃单元、一个既不含羟基也不含芳香环的
乙烯基酯单元和一个含羟基的单体单元。聚合物的羟值为 110 mgKOH/g 或更高。