| 摘要 |
PURPOSE:An elastic packing having improved head distortion resistance, creep resistance and weather resistance, obtained by molding a composition consisting of a specific vinyl chloride resin, a partially crosslinked acrylonitrile-butadiene copolymer, a plasticizer, and a nickel dialkyl dithiocarbamate. CONSTITUTION:(A) 100pts.wt. high polymer comprising 30-80wt%, preferably 40-60wt% vinyl chloride resin having >=2,000 average polymerization degree and 70-20wt%, preferably 60-40wt% partially crosslinked acrylonitrile-butadiene copolymer is blended with (B) 20-200pts.wt. di-2-ethylhexyl phthalate, dibutyl phthalate, etc. as a plasticizer, (C) 0.5-10pts.wt., preferably 1-5pts.wt. nickel dialkyl dithiocarbamate as a stabilizer in a dry state, granulated, pelletized, and molded by extrusion molding, etc., to produce an elastic packing.
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