| 摘要 |
PURPOSE:The titled composition useful as thin molded articles such as rainwater pipes, deck materials, etc., having low coefficient of linear expansion, improved impact resistance, etc., obtained by blending a vinyl chloride resin with gypsum fibers, chlorinated polyethylene, etc. as an improver for increasing adhesive of vinyl chloride resin to gypsum. CONSTITUTION:(A) 100pts.wt. vinyl chloride resin (preferably PVC, polyvinylidene chloride, chlorinated PVC, etc.) is blended with (B) 5-50pts.wt. gypsum fibers (preferably gypsum fibers having 100-200mu diamaters, whose surface is treated with a coupling agent such as epoxysilane, etc.), (C) 5-20pts.wt. improver selected from chlorinated PE, ethylene-vinyl acetate copolymer, ABS, and MBS, and (D) 10-50pts.wt. thermosetting resin (polyester, epoxy resin, phenolic resin, etc.). The blend is preferably mixed with (E) 1-5pts.wt. one or more processing auxiliaries of MAS, and PMMA, and further preferably (F) 5-30pts.wt. glass beads (preferably glass beads having 50-100mu, whose surface is treated similarly to the component B).
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