Provided are a cured product (for example, a film), in which the balance between hydrophilicity and abrasion resistance is superior, decrease in hydrophilicity by water is minimal, and the weather resistance is also superior, as well as a polymer and a polymer composition that can yield such a cured product. A polymer of the invention is a specific copolymer (i) having a sulfonic acid-containing group, an epoxy group, and a specific alkoxysilyl group in a molecule.
本发明提供了一种固化产品(例如薄膜),该固化产品在亲
水性和耐磨性之间的平衡性非常好,亲
水性因
水的作用而降低的程度很小,耐候性也很好,还提供了一种聚合物和一种聚合物组合物,它们可以产生这样的固化产品。本发明的聚合物是一种特定的共聚物(i),其分子中含有一个
磺酸基团、一个环氧基团和一个特定的烷氧基
硅烷基团。