Process for making high stereoregular polypropylenes
    7.
    发明授权
    Process for making high stereoregular polypropylenes 失效
    制备高立体规则聚丙烯的方法

    公开(公告)号:US6096843A

    公开(公告)日:2000-08-01

    申请号:US858498

    申请日:1997-05-19

    摘要: A process for the production of a high stereoregular polypropylene wherein(a) an isotactic pentad (m m m m) is 0.950 to 0.995,(b) a syndiotactic pentad (r r r r) is 0 to 0.01,(c) a different bond due to 2,1- and 1,3-insertions of propylene monomer is 0 to 0.3 mol %,(d) an absence of a terminal double bond is confirmed,(e) a weight average molecular weight (Mw) is 50,000 to 1,000,000 and(f) a ratio (Mw/Mn) of the weight average molecular weight (Mw) to a number average molecular weight (Mn) is 1.5 to 3.8, (a) to (d) being determined from .sup.13 C NMR spectra, comprising polymerizing propylene in the presence of hydrogen using a catalyst comprising a chiral transition metal compound and an aluminoxane, the transition metal compound being represented by the formula of Q(C.sub.5 H.sub.4-m R.sup.1.sub.m) (C.sub.5 H.sub.4-n R.sup.2.sub.n)MXY wherein (C.sub.5 H.sub.4-m R.sup.1.sub.m) and (C.sub.5 H.sub.4-n R.sup.2.sub.n) represent a substituted cyclopentadienyl group; m and n are an integer of 1 to 3; R.sup.1 and R.sup.2 may be the same or different and each represents an alkyl group of 1 to 20 carbons; Q is a group capable of crosslinking (C.sub.5 H.sub.4-m R.sup.1.sub.m) and (C.sub.5 H.sub.4-n R.sup.2.sub.n) and represents a divalent, hydrocarbyl radical, an unsubstituted silylene group or a hydrocarbyl-substituted silylene group; M represents a transition metal selected from the group consisting of titanium, zirconium, and hafnium; X and Y may be the same or different and each represents a hydrogen, a halogen or a hydrocarbyl radical, and wherein said polymerization is performed by a slurry polymerization using an aliphatic hydrocarbon as a solvent or by a bulk polymerization using propylene as a solvent.

    摘要翻译: 一种制备高立构规则聚丙烯的方法,其中(a)全同立构五单元组(mmmm)为0.950-0.995,(b)间同立构五单元组(rrrr)为0至0.01,(c)由于2,1 - 和丙烯单体的1,3-插入为0〜0.3摩尔%,(d)不存在末端双键,(e)重均分子量(Mw)为50,000〜1,000,000,(f)a 重均分子量(Mw)与数均分子量(Mn)之比(Mw / Mn)为1.5至3.8,(a)至(d)由13 C NMR谱确定,包括在存在下聚合丙烯 使用包含手性过渡金属化合物和铝氧烷的催化剂的氢,所述过渡金属化合物由下式Q(C5H4-mR1m)(C5H4-nR2n)MXY表示,其中(C5H4-mR1m)和(C5H4-nR2n)表示 取代的环戊二烯基; m和n为1〜3的整数, R 1和R 2可以相同或不同,各自表示1〜20个碳的烷基; Q是能够交联的基团(C5H4-mR1m)和(C5H4-nR2n),代表二价烃基,未取代的亚甲硅烷基或烃基取代的亚甲硅烷基; M表示选自钛,锆和铪的过渡金属; X和Y可以相同或不同,各自表示氢,卤素或烃基,并且其中所述聚合通过使用脂族烃作为溶剂的淤浆聚合或通过使用丙烯作为溶剂的本体聚合进行。

    Propylene-ethylene copolymers processes for the production thereof and
molded articles made therefrom
    8.
    发明授权
    Propylene-ethylene copolymers processes for the production thereof and molded articles made therefrom 失效
    丙烯 - 乙烯共聚物的制备方法和由其制成的模塑制品

    公开(公告)号:US6156856A

    公开(公告)日:2000-12-05

    申请号:US142033

    申请日:1998-09-01

    摘要: There are provided propylene-ethylene copolymers from which there are made molded articles having excellent heat resistance and films having both low temperature heat-sealing characteristics and stiffness, processes for the production thereof and molded articles. The propylene-ethylene copolymers contain 0.01-15 mol % of an ethylene unit and are characterized by that in the chain structure determined by NMR, triad (PEP), triad (EEE) and a ratio (N.sub..alpha..beta.) of all .alpha., .beta.-methylene carbons to all propylene units are in the specified range, a weight average molecular weight is 50,000-1,500,000 and a molecular weight distribution (Mw/Mn) is 1.2-3.8. The copolymers can be produced by copolymerizing ethylene and propylene in the presence of a catalyst in which the specified chiral transition metal compound (metallocene) and aluminoxane are combined.

    摘要翻译: PCT No.PCT / JP97 / 00038 Sec。 371日期:1998年9月1日 102(e)1998年9月1日PCT PCT 1997年1月10日PCT公布。 出版物WO98 / 30614 PCT 日期1998年7月16日提供丙烯 - 乙烯共聚物,其中制备具有优异耐热性的模制品和具有低温热封特性和刚度的薄膜,其制备方法和模塑制品。 丙烯 - 乙烯共聚物含有0.01-15mol%的乙烯单元,其特征在于在通过NMR,三单元组(PEP),三单元组(EEE)和所有α,β的比率(Nαβ)测定的链结构中 所有丙烯单元的亚甲基碳数均在规定范围内,重均分子量为50,000-1,500,000,分子量分布(Mw / Mn)为1.2-3.8。 共聚物可以通过在其中组合指定的手性过渡金属化合物(金属茂)和铝氧烷的催化剂存在下共聚合乙烯和丙烯来制备。