| 摘要 |
PURPOSE:To improve an effect of imparting lubricity to the surface of a resin molding without causing lowering in glass, by blending a benzoguanamine resin powder with a surface treating agent mainly composed of a polyurethane resin. CONSTITUTION:An org. diisocyanate compd. (e.g. hexamethylene diisocyanate) and a chain extender (e.g. ethylenediamine) are reacted with a polyester polyol or a polyether polyol to prepare a polyurethane resin having an MW of 50,000-150,000 and giving a film having 100% modulus of 60kg/cm<2> or below. 1-20pts.wt. benzoguanamine powder having a particle size of 0.2-50mu is mixed with 100pts.wt. said polyurethane resin in a homomixer to obtain the desired compsn. for surface treatment. The mixing may be carried out in a solvent.
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