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RUBBER-MODIFIED STYRENE POLYMER RESIN COMPOSITION FOR EXTRUSION FOAMING, EXTRUSION-FOAMED SHEET OF THE RESIN AND PRODUCTION OF EXTRUSION-FOAMED SHEET OF THE RESIN
RUBBER-MODIFIED STYRENE POLYMER RESIN COMPOSITION FOR EXTRUSION FOAMING, EXTRUSION-FOAMED SHEET OF THE RESIN AND PRODUCTION OF EXTRUSION-FOAMED SHEET OF THE RESIN
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机译:用于挤出发泡,树脂的挤出发泡板和生产树脂的挤出发泡板的橡胶改性苯乙烯聚合物树脂组合物
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摘要
PURPOSE: To easily obtain an extrusion-foamed sheet having sufficiently developed foam membrane, high closed cell ratio and excellent foaming agent retaining performance and, accordingly, excellent post-forming performance. ;CONSTITUTION: This rubber-modified styrene polymer resin composition for extrusion-foaming contains a resin composed of (A) a rubber-modified styrene polymer having a methanol-soluble content of ≤4wt.% and containing rubber polymer particles having an average particle diameter of ≤3μm and dispersed in the continuous phase of a styrene polymer having a Z-average molecular weight of ≥330,000 and (B) a styrene polymer having a Z-average molecular weight of ≥700,000. The extrusion-foamed sheet is produced by extrusion- foaming the resin composition incorporated with a volatile foaming agent. The resin component may be compounded with 5-25wt.% (based on the total resin component) of a styrene-butadiene block copolymer or its hydrogenated product.;COPYRIGHT: (C)1996,JPO
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