The present invention relates the case of performing the addition of moisture sorption fine particles in order to impart a moisture sorption on the coating film and molded resin, or whitish appearance, for example, when wet with water, such as the shape or change problems. The present inventors have results which have continued intensive studies, the salt type carboxyl group, a hydroxyl group and, if vinyl polymer having a crosslinked structure, coating films or resin molded article obtained by blending this and excellent high moisture sorption water It found that both sex, and completed the present invention. The purpose of the present invention, when formulated into such coating or resin molding, high moisture-absorbing and desorbing and high moisture permeability capable of providing polymers, further polymers and capable of providing also excellent water resistance it is to provide a material containing such polymer.
The A salt type carboxyl group containing 1~7mmol / g, and hydroxyl containing 0.01~10mmol / g, and moisture sorption heavy, which is a vinyl polymer having a crosslinked structure coalescence.
.BACKGROUND