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    • 3. 发明授权
    • Propylene-ethylene copolymer having improved stretchability
    • 具有改善的拉伸性的丙烯 - 乙烯共聚物
    • US4414373A
    • 1983-11-08
    • US399146
    • 1982-07-16
    • Akinobu ShigaKiyoshi MatsuyamaMasahiro KakugoYukio NaitoSeiichiro ImaKatsuyoshi Yamashita
    • Akinobu ShigaKiyoshi MatsuyamaMasahiro KakugoYukio NaitoSeiichiro ImaKatsuyoshi Yamashita
    • C08F4/00C08F2/00C08F4/60C08F4/64C08F10/00C08F10/06C08F210/00C08F210/06C08F210/16
    • C08F210/06
    • In a process for producing polypropylene comprising polymerizing propylene in the presence of hydrogen and a catalyst system comprising (A) titanium trichloride obtained by reducing titanium tetrachloride with an organoaluminum compound and reacting the reduced solid with an ether represented by the formula:R.sup.1 --O--R.sup.2wherein R.sup.1 and R.sup.2 are defined hereinbefore, and a halogen compound selected from the group consisting of (i) halogen or interhalogen compounds of the formula, X.sup.1 X.sup.2.sub.a (wherein X.sup.1, X.sup.2 and a are defined hereinbefore), (ii) titanium halides, and (iii) organic halogen compounds, simultaneously or successively and (B) an organoaluminum compound, the improvement which comprises supplying ethylene together with propylene to the polymerization system such that the ethylene concentration in the vapor phase of the system based on the total amount of propylene, ethylene and hydrogen in the vapor phase of the system is 0.15 to 1.5 mol % to obtain a propylene-ethylene copolymer having an ethylene content of from 0.1 to 1.0 wt % is disclosed. The propylene-ethylene copolymer is improved in stretchability.
    • 在制备聚丙烯的方法中,包括在氢气存在下聚合丙烯和催化剂体系,所述催化剂体系包含(A)通过用有机铝化合物还原四氯化钛获得的三氯化钛,并将还原的固体与由下式表示的醚反应:R1-O- 其中R 1和R 2如上定义,卤素化合物选自(ⅰ)卤素或下式的卤代化合物:X1X2a(其中X1,X2和a定义如前),(ⅱ)卤化钛和 (iii)有机卤素化合物,同时或相继和(B)有机铝化合物,其改进包括将乙烯与丙烯一起供应到聚合体系中,使得基于丙烯总量的体系的气相中的乙烯浓度 ,系统的气相中的乙烯和氢为0.15〜1.5摩尔%,得到丙烯 - 乙烯共聚物 公开了乙烯含量为0.1〜1.0重量%。 丙烯 - 乙烯共聚物的拉伸性提高。
    • 4. 发明授权
    • Process for producing propylene-ethylene block copolymers
    • 制备丙烯 - 乙烯嵌段共聚物的方法
    • US4254237A
    • 1981-03-03
    • US30523
    • 1979-04-16
    • Akinobu ShigaMasahiro KakugoHajime SadatoshiKazuki WakamatsuHiroshi Yoshioka
    • Akinobu ShigaMasahiro KakugoHajime SadatoshiKazuki WakamatsuHiroshi Yoshioka
    • C08F297/00C08F297/08
    • C08F297/086
    • A process for producing propylene-ethylene block copolymers by a three-step polymerization technique using a stereoregular catalyst, characterized in that the first-step polymerization is carried out by supplying propylene alone or a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 6/94 or less, thereby polymerizing 60 to 95% by weight of the total polymerization amount, the second-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 15/85 to 79/21, thereby polymerizing 1 to 20% by weight of the total polymerization amount, and the third-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 50/50 to 89/11, thereby polymerizing 4 to 35% by weight of the total polymerization amount, with the ethylene/propylene reaction ratio in the third step made larger than that in the second step. Said process can give propylene-ethylene block copolymers markedly well balanced in impact strength, stiffness, transparency and impact blushing.
    • 一种通过使用立体规则催化剂的三步聚合技术制备丙烯 - 乙烯嵌段共聚物的方法,其特征在于第一步聚合是通过仅供应丙烯或丙烯/乙烯混合物进行的,以使乙烯/丙烯反应比 为6/94以下,由此聚合60〜95重量%的总聚合量,第二步聚合是通过供给丙烯/乙烯混合物进行的,以使乙烯/丙烯反应比为15/85〜79 / 21,由此聚合1至20重量%的总聚合量,第三步聚合通过供应丙烯/乙烯混合物进行,使得乙烯/丙烯反应比为50/50至89/11, 从而聚合4〜35重量%的总聚合量,第3步骤中的乙烯/丙烯反应比例大于第2步骤。 所述方法可以使丙烯 - 乙烯嵌段共聚物在冲击强度,刚度,透明度和冲击冲刷中显着地平衡。
    • 10. 发明授权
    • Process for producing a propylene-ethylene copolymer having improved
stretchability
    • 制备具有改善的拉伸性的丙烯 - 乙烯共聚物的方法
    • US4355144A
    • 1982-10-19
    • US257431
    • 1981-04-24
    • Akinobu ShigaKiyoshi MatsuyamaMasahiro KakugoYukio NaitoSeiichiro ImaKatsuyoshi Yamashita
    • Akinobu ShigaKiyoshi MatsuyamaMasahiro KakugoYukio NaitoSeiichiro ImaKatsuyoshi Yamashita
    • C08F4/00C08F2/00C08F4/60C08F4/64C08F10/00C08F10/06C08F210/00C08F210/06C08F210/16
    • C08F210/06
    • In a process for producing polypropylene comprising polymerizing propylene in the presence of hydrogen and a catalyst system comprising (A) titanium trichloride obtained by reducing titanium tetrachloride with an organoaluminum compound and reacting the reduced solid with an ether represented by the formula:R.sup.1 -O-R.sup.2wherein R.sup.1 and R.sup.2 are defined hereinbefore, and a halogen compound selected from the group consisting of (i) halogen or interhalogen compounds of the formula, X.sup.1 X.sup.2.sub.a (wherein X.sup.1, X.sup.2 and a are defined hereinbefore), (ii) titanium halides, and (iii) organic halogen compounds, simultaneously or successively and (B) an organoaluminum compound, the improvement which comprises supplying ethylene together with propylene to the polymerization system such that the ethylene concentration in the vapor phase of the system based on the total amount of propylene, ethylene and hydrogen in the vapor phase of the system is 0.15 to 1.5 mol % to obtain a propylene-ethylene copolymer having an ethylene content of from 0.1 to 1.0 wt % is disclosed. The propylene-ethylene copolymer is improved in stretchability.
    • 在制备聚丙烯的方法中,包括在氢气存在下聚合丙烯和催化剂体系,所述催化剂体系包含(A)通过用有机铝化合物还原四氯化钛获得的三氯化钛,并将还原的固体与由下式表示的醚反应:R1-O- 其中R 1和R 2如上定义,卤素化合物选自(ⅰ)卤素或下式的卤代化合物:X1X2a(其中X1,X2和a定义如前),(ⅱ)卤化钛和 (iii)有机卤素化合物,同时或相继和(B)有机铝化合物,其改进包括将乙烯与丙烯一起供应到聚合体系中,使得基于丙烯总量的体系的气相中的乙烯浓度 ,系统的气相中的乙烯和氢为0.15〜1.5摩尔%,得到丙烯 - 乙烯共聚物 公开了乙烯含量为0.1〜1.0重量%。 丙烯 - 乙烯共聚物的拉伸性提高。