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发明公开
CN1662589A 制备可膨胀聚苯乙烯的方法 失效 - 权利终止 诉讼 无效申请 无效口审

制备可膨胀聚苯乙烯的方法
摘要：
本发明涉及一种制备分子量Mw大于170,000g/mol的可膨胀苯乙烯聚合物的方法，其中包括将温度为至少120℃的含发泡剂的苯乙烯聚合物熔体输送通过带孔模板，所述孔在模出口上的直径最大为1.5mm，并随后将挤出物粒化，还涉及带有0.05－1.5重量％内部水的且分子量Mw大于170,000g/mol的可膨胀苯乙烯聚合物(EPS)。
摘要（英）：

A process for the preparation of expandable styrene polymers having a molecular weight Mw of greater than 170,000 g/mol, which comprises conveying a blowing agent-containing styrene polymer melt having a temperature of at least 120° C. through a die plate with holes whose diameter at the die exit is at most 1.5 mm, and subsequently granulating the extrudate, and expandable styrene polymers (EPS) having a molecular weight Mw of more than 170,000 g/mol with 0.05 to 1.5% by weight of internal water.

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