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    • 2. 发明授权
    • Diene/acrylate based impact modifier for PVC
    • 二烯/丙烯酸酯类抗冲击改性剂
    • US4443585A
    • 1984-04-17
    • US502904
    • 1983-07-12
    • Theodore D. Goldman
    • Theodore D. Goldman
    • C08F285/00C08L27/06C08L51/00C08F279/02
    • C08F285/00C08L27/06C08L51/00Y10S525/902
    • Impact modifiers having high efficiency at low levels and at low temperatures comprising at least three stages, Stage A being a non-crosslinked polymer of at least 70% butadiene and at least 10% lower alkyl (C.sub.2 -C.sub.8) acrylate, Stage B being a polymer of at least 80% styrene, and Stage C containing at least 50% methyl methacrylate and at least 1% alkyl (C.sub.1 -C.sub.4) acrylate, the ratio of Stages A:B:C, excluding optional additional stages, being about 70-85:10-15:10-20, the ratio of stages C:B being at least 1, and Stage A being non-agglomerated are disclosed. Also disclosed are methods of preparing the impact modifier and thermoplastic polymer compositions containing the impact modifier.
    • 在低水平和低温下具有高效率的冲击改性剂包含至少三个阶段,阶段A是至少70%丁二烯和至少10%的低级烷基(C 2 -C 8)丙烯酸酯的非交联聚合物,阶段B是 含有至少50%甲基丙烯酸甲酯和至少1%烷基(C 1 -C 4)丙烯酸酯的C级聚合物,不包括任选的附加级的级分A:B:C的比例为约70% 85:10-15:10-20,阶段C:B的比例至少为1,阶段A未凝聚。 还公开了制备包含抗冲改性剂的抗冲改性剂和热塑性聚合物组合物的方法。