摘要:
A process for preparing bimodal molecular weight distribution copolymers of ethylene with alpha-olefins having 3 to 20 carbon atoms, said copolymers having: (a) a comonomer distribution wherein the comonomer level at the mid-position of the low molecular weight component is
摘要:
Catalyst compositions comprising metallocene complexes having Lewis base functionality may be used for the preparation of polyolefins. Preferred complexes are zirconium complexes in which the Lewis base functionality is provided by ether or thioether groups. The catalyst compositions may be supported on inorganic supports or on supports having polymerisation activity eg Ziegler catalysts.
摘要:
Catalyst compositions comprising both metallocene complexes having polymerisable groups and polymerization catalysts eg Ziegler-Natta may be used for the preparation of polyolefins. The catalyst compositions may comprise the metallocene complex in the form of a polymer and may suitably be supported on inorganic supports. Polymers having a wide range of molecular weights and comonomer distributions may be prepared by use of the catalyst compositions. Preferred metallocene complexes are zirconium complexes in which the polymerisable group is vinyl.
摘要:
A catalyst composition for preparing polyketones comprises (a) a Group VIII metal compound, containing at least one ligand capable of coordinating to the Group VIII metal and, (b) a compound of the formula BXYZ where at least one of X, Y and Z is a chloro or bromophenyl group preferably B(p-ClC.sub.6 H.sub.4).sub.3. Polyketones having p-chlorophenyl or p-bromophenyl end groups are also disclosed.
摘要翻译:用于制备聚酮的催化剂组合物包含(a)含有至少一种能够与VIII族金属配位的配位体的第Ⅷ族金属化合物,和(b)式BXYZ化合物,其中X,Y和Z中的至少一个 是氯或溴苯基,优选B(p-ClC 6 H 4)3。 还公开了具有对氯苯基或对溴苯基端基的聚酮。
摘要:
A process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor using a metallocene catalyst in that the polymerization is preformed in the presence of a process aid additive selected from at least one of 1) a polysulfone copolymer, 2) a polymeric polyamine, or 3) an oil-soluble sulfonic acid.
摘要:
A catalyst composition comprising at least one metallocene complex of general formula I or II ##STR1## wherein R is a univalent of divalent 1-20c hydrocarbyl, or a 1-20c hydrocarbyl containing substituent oxygen, silicon, phosphorus, nitrogen of sulphur atoms with the proviso that at least one R group contains a lewis base functionality and when there are two or more R groups present they may be the same or different, and when R is divalent it is directly attached to M and replaces a Y ligand, and wherein M is a Group IVA metal,Y is a univalent anionic ligand X is an organic group containing a cyclopentadienyl nucleus and for formula I n is an integer of 1 to 10 x is either 1 or 2, and for formula II, n, m and l are integers or 0 such that n +m +l .gtoreq.1, p =0-2, and z is a c.sub.1 to c.sub.4 alkylene radical or a dialkyl germanium or silicon or an alkyl phosphine or amine radical or bis-dialkylsilyl or bis-dialkylgermanyl containing hydrocarbyl groups having 1 to 4 carbon atoms bridging the cyclopentadienyl nuclei.
摘要翻译:一种催化剂组合物,其包含至少一种通式I或II M [X(R)n] x Yp(I)的茂金属络合物,其中R是二价1-20c烃基的一价或含有1-20c烃基的取代基 氧,硅,磷,氮原子,条件是至少一个R基团含有路易斯碱官能团,当存在两个或多个R基时,它们可以相同或不同,当R为二价时,它直接 M代替Y配体,其中M是IVA族金属,Y是一价阴离子配位体X是含有环戊二烯基核的有机基团,对于式I,n是1至10的整数,x是1或 对于式II,对于式II,n,m和l是整数或0,使得n + m + l> / = 1,p = 0-2,z是c1至c4亚烷基或二烷基锗或硅或 烷基膦或胺基或具有1至4个碳原子的烃基的双 - 二烷基甲硅烷基或双 - 二烷基富马净 剔除环戊二烯基核。
摘要:
Catalyst compositions comprising metallocene complexes having polymerisable may be used for the preparation of polyolefins. The catalyst compositions may be in the form of polymers comprising the metallocene complex and may be suitably supported on inorganic supports. Polymers having a broad range of density and melt indices as well as low hexane extractables and excellent powder morphology and flowability may be obtained by use of the catalyst compositions. Preferred metallocene complexes are zirconium complexes in which the polymerisable group is vinyl.
摘要:
Catalyst compositions comprising metallocene complexes having polymerisable olefinic groups substituent on an organic group containing a cyclopentadienyl nucleus may be used for the preparation of polyolefins. The catalyst compositions may be in the form of polymers comprising the metallocene complex and may be suitably supported on inorganic supports. Polymers having a broad range of density and melt indices as well as low hexane extractables and excellent powder morphology and flowability may be obtained by use of the catalyst compositions. Preferred metallocene complexes are zirconium complexes in which the polymerisable olefinic group is vinyl.