公开(公告)号：US06391976B1

公开(公告)日：2002-05-21

申请号：US09622055

申请日：2000-12-04

申请人： Naho Naka ,  Akira Nakata ,  Shigeo Wakabayashi ,  Seiji Takei

发明人： Naho Naka ,  Akira Nakata ,  Shigeo Wakabayashi ,  Seiji Takei

IPC分类号： C08L2706

CPC分类号： C08J9/103 ,  C08F220/14 ,  C08J9/0061 ,  C08J2327/06 ,  C08J2433/00 ,  C08L27/06 ,  C08L33/10 ,  C08L33/12 ,  C08L2666/04 ,  C08F2220/1825

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 (&eegr;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.

摘要翻译： 一种用于发泡成型的加工助剂（B），其包含由50至80重量％的甲基丙烯酸甲酯，20至50重量％的具有3至5个碳原子的烷基的甲基丙烯酸烷基酯组成的粉末共聚物和0 至20重量％的其它可共聚单体，该共聚物具有4至8的降低的粘度（etasp / c）。该加工助剂的使用允许氯乙烯树脂被有效地捏合并赋予其增加的熔体强度，使得细 并且可以形成均匀的发泡单元，此外，可以实现高发泡率和有吸引力的成型外观。