AQUEOUS PRIMER COMPOSITION

摘要

Disclosed is an aqueous primer composition containing (A) an aqueous dispersion of a modified polyolefin, which is obtained by dispersing, in an aqueous medium, a modified polyolefin (a) obtained by modifying an unsaturated carboxylic acid-modified or unsaturated carboxylic acid anhydride-modified polyolefin (i) having a melting point of not more than 120°C and a weight average molecular weight of 30,000-200,000 with a compound having a polyoxyalkylene chain; (B) at least one aqueous resin selected from aqueous urethane resins, aqueous acrylic resins and aqueous polyester resins; and (C) a pigment. The solid content weight ratio between the component (A) and the component (B) is within the range from 20/80 to 85/15, and 0.5-200 parts by weight of the component (C) is contained per 100 parts by weight of the total resin solid content in the composition. By using such an aqueous primer composition, there can be formed a coating film which is excellent in water resistance, moisture resistance and gasohol resistance.