METHOD FOR IMPROVING CISSING RESISTANCE OF COATING FILM

摘要

PROBLEM TO BE SOLVED: To provide a method of improving the cissing resistance of a coating film and further to provide a method of effectively improving the cissing resistance of a water paint under an environment where the cissing easily occurs. SOLUTION: In the application of the water paint on a material to be coated, the cissing resistance of the coating film is improved by controlling the storage elasticity modulus G' by vibration measurement in 0.1 Hz frequency at 25°C to 5-500 Pa and the ratio (G'/G'') of the storage elasticity modulus G' to loss elasticity modulus G'' to 0.5-5.0 in the wet coating film right after the water paint to be applied which has 21-30 mN surface tension at 25°C measured by a pendant drop method is applied on the material to be coated. COPYRIGHT: (C)2008,JPO&INPIT