Abstract:
Provided is an electrically-conductive resin composition comprising an ethylene/.alpha.-olefin copolymer and carbon black, said ethylene/.alpha.-olefin copolymer having the following properties (i)-(iv) and being prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid catalyst component and an organoaluminum compound, said solid catalyst component containing at least magnesium and titanium:(i) Melt index: 0.01-100 g/10 min(ii) Density: 0.860-0.930 g/cm.sup.3(iii) Maximum peak temperature (Tm) according to Differential Scanning Calorimetry (DSC): not lower than 100.degree. C.(iv) Percent insoluble in boiling n-hexane: not less than 10 wt. %.
Abstract:
An olefin is polymerized using a catalyst obtained by contacting (1) at least one of silicon or aluminum dioxide, (2) a compound of the formula ROH wherein R is a hydrocarbon radical having 1 to 20 carbon atoms, and (3) a substance obtained by supporting a titanium or a vanadium compound on a magnesium or manganese halide.
Abstract:
According to the present invention, there is provided a process for preparing polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst consisting of a solid component and an organometallic compound component, characterized in that said solid component is obtained by copulverizing(1) a magnesium halide and/or a manganese halide,(2) an aromatic hydrocarbon,(3) a tetravalent titanium compound, and(4) a trivalent titanium compoundAnd in that said organometallic compound component is a mixture of(5) a trialkylaluminum and(6) a compound represented by the general formula AlR.sub.n X.sub.3-n wherein R is alkyl having 1 to 10 carbon atoms and may be the same or different, X is halogen and O
Abstract:
According to the present invention, there is provided a process for preparing polyolefins which comprises polymerizing or copolymerizing olefins using as catalyst a component consisting of a solid carrier and a titanium compound and/or a vanadium compound supported thereon, and an organometallic compound, said solid carrier consisting of a product obtained by mixing and heating an aluminum oxide and an ammonium sulfate.
Abstract:
Provided is a process for preparing a polyolefin, characterized by polymerizing at least one .alpha.-olefin in the presence of a catalyst which comprises the combination of:[I] a solid catalyst component comprising a solid substance obtained by contacting the following components (1) through (3) with one another and (4) a titanium compound supported on said solid substance:(1) a magnesium halide,(2) a compound represented by the general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each a hydrocarbon radical having 1 to 24 carbon atoms, an alkoxy group, hydrogen, or a halogen atom, R.sup.4 is a hydrocarbon radical having 1 to 24 carbon atoms and n is 1.ltoreq.n.ltoreq.30, and(3) at least one compound selected from the group consisting of:(a) compounds represented by the general formula ##STR2## wherein R is hydrogen, a halogen atom, or a hydrocarbon radical having 1 to 24 carbon atoms, and r, p and q are integers satisfying the following conditions:1.ltoreq.r.ltoreq.3, 0.ltoreq.p
Abstract translation:提供了一种制备聚烯烃的方法,其特征在于在催化剂存在下使至少一种α-烯烃聚合,所述催化剂包含以下组合:[I]包含通过使下列组分(1)接触获得的固体物质的固体催化剂组分, 通过(3)彼此和(4)负载在所述固体物质上的钛化合物:(1)卤化镁,(2)由通式“IMAGE”表示的化合物,其中R 1,R 2和R 3各自为烃 具有1至24个碳原子的基团,烷氧基,氢或卤素原子,R 4是具有1至24个碳原子的烃基,n是1≤n≤30,和(3)至少一个 选自以下的化合物:(a)由通式表示的化合物,其中R是氢,卤素原子或具有1至24个碳原子的烃基,并且r,p和q是满足 以下条件:1 = r = 3,0 = p <6,0 r + p + q <6,(b)烷基 亚磷酸酯,(c) - (e)氧,氮或含硫杂环羧酸酯,(f)烷基硅烷醇,(g)烷氧基硼卤化物,(h)烷基和/或烷氧基取代的亚砜,和(i) 取代的氨基甲酸酯[II]有机金属化合物; 和[III]由通式表示的化合物,其中R 1,R 2和R 3各自为具有1至24个碳原子的烃基,烷氧基,氢或卤素原子,R 4为具有1 至24个碳原子,n为1 = 30。
Abstract:
Provided is a polymer composition having a melt index of 0.01 to 5.0 and a density of 0.870 to 0.940 prepared by blending 30 to 80 parts by weight of an ethylene/propylene copolymer having an intrinsic viscosity determined in decalin at 135.degree. C. of 1.7 to 10 dl/g and a density not higher than 0.945 which copolymer is obtained by copolymerizing ethylene with propylene, with 70 to 20 parts by weight of a high-pressure process polyethylene having an intrinsic viscosity determined in decalin at 135.degree. C. of not higher than 0.7 dl/g and a density of 0.915 to 0.935.
Abstract:
The present invention provides an improved process for preparing a polyolefin cross-linked by silane linkage by contacting a polyolefin modified with silane with water in the presence of a silanol condensation catalyst, the improvement comprising said polyolefin modified with silane being a reaction product produced by reacting an ethylene/.alpha.-olefin copolymer having a density of from 0.850 to 0.910 with a silane compound in the presence of a free radical generating agent, said ethylene/.alpha.-olefin copolymer being prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in a vapor phase with substantially no solvent present and in the presence of a catalyst comprising an organoaluminum compound and a solid substance containing magnesium, and a metal selected from the group consisting of titanium, vanadium and mixture thereof.
Abstract:
In an olefin polymerizing catalyst comprising a solid catalyst component and an organometallic compound, there is used, as the solid catalyst component, a substance obtained by contacting and reacting the following compounds with one another:(1) a silicon oxide and/or an aluminum oxide,(2) a magnesium halide,(3) a compound represented by the general formula Me(OR).sub.n X.sub.z--n wherein Me is an element belonging to Groups I through IV in the Periodic Table, z is the valence of the element Me, n is 0
Abstract:
According to the present invention, there is provided a process for preparing polyolefins comprising polymerizing or copolymerizing olefins using as catalyst a titanium-containing solid and an organometallic compound of a metal of Groups I to IV of the Periodic Table, said titanium-containing solid consisting of a reaction product obtained by copulverizing (1) a magnesium halide and/or a manganese halide, (2) an organohalide and (3) a tetravalent and/or a trivalent titanium compound(s).
Abstract:
The present invention discloses improved catalysts for polymerizing or copolymerizing olefins and a process for the production of polyolefins comprising a polymerization or copolymerization of olefins by the use of said catalysts. According to the invention there is provided a process for the production of polyolefins by polymerizing or copolymerizing olefins using as the catalyst a solid component containing a titanium compound and/or a vanadium compound and an organometallic compound, said solid component comprising a substance obtained by co-pulverizing (1) a metal halide selected from the group consisting of magnesium halides and manganese halides, (2) a compound represented by the general formula B(OR).sub.n X.sub.3-n X3 in which n is a number of the range 0