| 摘要 |
PURPOSE:To smoothen the surface of a coating film on a fluororesin to be coated, by using a compsn. contg. a fluororesin, polyether sulfone particles having a specified particle size or below, water and a polar org. solvent. CONSTITUTION:The titled compsn. consists of polyether sulfone (hereinafter referred to as PES) particles having a particle size of 5mu or below, a fluoro- resin, water and a polar org. solvent. The PES powder having a particle size of 5mu or below is prepd. in the following manner. Water is premixed with the coarse PES particles, and a polar org. solvent (e.g. N-methyl-2-pyrrolidone) is added to the resulting mixture. A preferred blending ratio is in the range of PES:water:solvent=5-35%:15-55%:35-65%(pts.wt.). The resulting mixture is treated in a conventional ball mill for 20-40hr and crushed in a mixer having a high shearing force. Pref. 10-90wt% PES resin is blended with 90-10wt% fluororesin (the combined quantity being 100%) from the viewpoints of tackiness and adhesion.
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