MATTE POWDERY COATING COMPOSITION, METHOD FOR COATING AND FILM MADE THEREFROM

摘要

PURPOSE: To obtain a matte powdery coating composition hardly fluctuating the gloss value with a variation in blending ratio of resins or baking conditions. ;CONSTITUTION: This matte powdery coating composition comprises three kinds of thermosetting polyester resins (A), (B) and (C) and a curing agent. When the elastic moduli of reactional systems (a), (b) and (c) prepared by respectively combining the resins (A), (B) and (C) with the curing agent in 0.8-1.25 equiv. ratio at 200°C after 3min are respectively E_a, E_b and E_c, the difference in the elastic moduli E_b-E_a=E_b-a is 20dyn/cm²E_b-a10³dyne/cm² and E_c-E_a=E_c-a is 1dyn/cm²E_c-a10dyn/cm². The weight ratio of the resin (A)/resin (B) is (90/10) to (70/30) and the weight ratio of the resin (A)/resin (C) is (85/15) to (60/40). Smaller uneven parts 5 than unevennesses composed of protruding parts 3 and recessed parts 4 are formed therein in a film 2 formed therefrom and the gloss value hardly fluctuates.;COPYRIGHT: (C)1994,JPO