Water-borne coating composition.

摘要

An aqueous composition comprising an aqueous or water-insoluble resin, and, dispersed in the composition, a graft polymer having a total molecular weight of 5000 to 100,000 and comprising a branch chain with a molecular weight of 1000 to 4000 and a principal chain, wherein one of the branch chain and the principal chain is hydrophobic and has a solubility parameter of 8.0 to 115, and the other is hydrophilic and has a solubility parameter of 10.0 to 13.0, provided that there is a difference between the solubility parameters of at least 1, wherein an aqueous dispersion of the graft polymer has an integrating sphere turbidity of 50 degrees (kaoline) at a concentration of 10 to 70% by weight and a viscosity of 50 to 10,000 cps. There is a difference between the solubility parameters of the aqueous or water-insoluble resin and of a portion of the graft polymer of not more than 2.