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    • 81. 发明授权
    • 올레핀중합체의제조방법
    • KR100359370B1
    • 2003-02-11
    • KR1019960705604
    • 1996-02-07
    • 미쓰이 가가쿠 가부시키가이샤
    • 수기무라껜지끼오까마모루
    • C08F297/08C08F4/642
    • C08F297/08C08F297/083Y10S526/943
    • The present invention provides processes for preparing olefin polymers, by which olefin polymers composed of a propylene block copolymer component and an ethylene/ alpha -olefin copolymer component are directly prepared by polymerization and olefin polymers excellent in impact resistance as well as in mechanical strength such as rigidity, moldability and heat resistance can be prepared. In the processes of the invention, a step (i) for preparing a crystalline polypropylene component and a step (ii) for preparing a low-crystalline or non-crystalline ethylene/ alpha -olefin copolymer component are carried out in an arbitrary order using an olefin polymerization catalyst to form a propylene block copolymer component; then another catalyst component is added to the polymerization system; and a step (iii) for preparing a low-crystalline or non-crystalline ethylene/ alpha -olefin copolymer component is carried out. The components of the olefin polymerization catalyst used for preparing the propylene block copolymer component and the components of another catalyst used for preparing the ethylene/ alpha -olefin copolymer component (iii) are selected from (A) a solid titanium catalyst component, (B) an organometallic compound, (C) an electron donor, (D) a specific transition metal compound containing a ligand having cyclopentadienyl skeleton, (E-1) an organoaluminum oxy-compound and (E-2) Lewis acid or ionic compound.
    • 本发明提供了用于制备烯烃聚合物的方法,其中由丙烯嵌段共聚物组分和乙烯/α-烯烃共聚物组分组成的烯烃聚合物通过聚合直接制备,并且耐冲击性以及机械强度优异的烯烃聚合物如 可以制备刚性,成型性和耐热性。 在本发明的方法中,用于制备结晶聚丙烯组分的步骤(i)和用于制备低结晶或非结晶乙烯/α-烯烃共聚物组分的步骤(ii)以任意顺序使用 烯烃聚合催化剂以形成丙烯嵌段共聚物组分; 然后将另一种催化剂组分加入到聚合体系中; 并进行用于制备低结晶或非结晶乙烯/α-烯烃共聚物组分的步骤(iii)。 用于制备丙烯嵌段共聚物组分的烯烃聚合催化剂的组分和用于制备乙烯/α-烯烃共聚物组分(iii)的另一种催化剂的组分选自(A)固体钛催化剂组分,(B) (C)电子给体,(D)含有具有环戊二烯基骨架的配体的特定过渡金属化合物,(E-1)有机铝氧化合物和(E-2)路易斯酸或离子化合物。 <图像>