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    • 4. 发明申请
    • IMPACT RESISTANT COMPOSITIONS
    • 抗冲击组合物
    • WO2003044086A1
    • 2003-05-30
    • PCT/US2002/035389
    • 2002-11-05
    • EXXONMOBIL CHEMICAL PATENTS INC.MEKA, PrasadaraoVALENTAGE, JeffreyBURKE, Paul, J.
    • MEKA, PrasadaraoVALENTAGE, JeffreyBURKE, Paul, J.
    • C08L23/00
    • C08L23/10C08L23/0815C08L23/142C08L23/16C08L2314/06C08L2666/06
    • Embodiments of the present invention include a composition formed from (a) 50 wt% to 85% of at least one impact copolymer relative too the total weight of the composition, the impact copolymer comprising up to 25 w% of an ethylene-propylene rubber, the rubber having a content of ethylene-derived units of from 40 wt% to 60wt% relative to the rubber; and (b) 50wt% to 15wt% of at least one plastomer relative to the total weight of the composition, wherein the plastomer is a copolymer of ethylene derived units and at least one of C 3 to C 8 α- olefin derived units from 5 wt% to 30wt% of the plastomer. The composition is useful for automotive components, especially interior automotive components such as airbag covers, the composition having a secant flexural modulus of at least 50 kpsi (345 MPa) and 100% ductility down to -40°C.
    • 本发明的实施方案包括由(a)50重量%至85重量%的至少一种抗冲共聚物形成的组合物,相对于组合物的总重量,抗冲共聚物包含至多25重量%的乙烯 - 丙烯橡胶, 所述橡胶的相对于橡胶的乙烯衍生单元的含量为40重量%〜60重量% 和(b)相对于所述组合物的总重量为50重量%至15重量%的至少一种塑性体,其中所述塑性体是乙烯衍生单元和至少一种C 3 -C 8α-烯烃衍生单元的共聚物,其中5重量% 至30wt%的塑性体。 该组合物可用于汽车部件,特别是室内汽车部件,例如安全气囊罩,该组合物具有至少50kpsi(345MPa)的正割弯曲模量和低至-40℃的100%延展性。