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    • 21. 发明授权
    • Incorporation of free radical inhibitors in polyolefins
    • 在聚烯烃中引入自由基抑制剂
    • US06410629B1
    • 2002-06-25
    • US08920625
    • 1997-08-27
    • Michael J. MullinsPeter N. NickiasJorge Soto
    • Michael J. MullinsPeter N. NickiasJorge Soto
    • C08K551
    • C08F10/00C08F4/61908C08F4/61927C08F110/06C08F2/44C08F4/61912
    • The invention includes a process for inhibiting deterioration in an olefin polymer by adding a phenolic free radical inhibitor during or before polymerization with a metallocene type transition metal catalyst without inactivating the free radical inhibitor because does not inhibit the transition metal catalyst activity. Preferably the free radical inhibitor is first to remove compounds which inhibit catalyst activity. The invention also includes a composition comprising at least one olefin monomer, a polymer of the monomer, a metallocene type transition metal catalyst and at least one free radical inhibitor having sufficient substituents to hinder the active inhibiting group such that it does not undesirably inhibit the transition metal catalyst.
    • 本发明包括通过在茂金属型过渡金属催化剂中聚合期间或之后添加酚类自由基抑制剂而不使自由基抑制剂失活而抑制烯烃聚合物的劣化的方法,因为不抑制过渡金属催化剂活性。 优选地,自由基抑制剂首先是去除抑制催化剂活性的化合物。 本发明还包括包含至少一种烯烃单体,单体的聚合物,茂金属型过渡金属催化剂和至少一种具有足够的取代基的自由基抑制剂的组合物,其阻碍活性抑制基团,使得其不会不希望地抑制转变 金属催化剂。