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Processing aid for foam molding and vinyl chloride resin composition using the same
Processing aid for foam molding and vinyl chloride resin composition using the same
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机译:用于泡沫成型的加工助剂和使用该助剂的氯乙烯树脂组合物
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摘要
A processing aid (B) for foam molding use which comprises a powdered copolymer composed of 50 to 80% by weight of methyl methacrylate, 20 to 50% by weight of an alkyl methacrylate having an alkyl group of 3 to 5 carbon atoms, and 0 to 20% by weight of other copolymerizable monomers, the copolymer having a reduced viscosity ( eta sp/c) of 4 to 8. Use of this processing aid permits vinyl chloride resins to be kneaded efficiently and imparts an increased melt strength thereto, so that fine and uniform foamed cells can be formed and, moreover, a high foaming ratio and an attractive molding appearance can be achieved.
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