SELF-CROSS-LINKABLE WATER DISPERSIBLE RESIN COMPOSITION

摘要

A self-cross-linkable water dispersible resin composition capable of realizing a water-base coating material which forms a coating film having excellent transparency, smoothness, chemical resistance and mechanical strength, ensures excellent applicability and has a satisfactory dispersion stability is produced by the process comprising the steps of: conducting a radical polymerization of a starting mixture in the presence of a polymerization initiator and a hydrogen bond forming organic solvent at or below the boiling point of the organic solvent, the starting mixture comprising: (a) 5 to 95 % by weight of a reactive water insoluble resin containing a reactive functional group and having a water solubility of 1 or below, and (b) 5 to 95 % by weight of a monomer mixture comprising 0.5 to 50 % by weight of a reactive ethylenically unsaturated monomer having a functional group capable of reacting with the above functional group (1), 1 to 40 % by weight of an ethylenically unsaturated monomer having a carboxyl group (2) and 10 to 98.5 % by weight of another ethylenically unsaturated monomer (3) (provided that the total of components (1) to (3) is 100 % by weight), and adding a neutralizer to the resultant resin composition to thereby neutralize the same.