摘要:
The present invention relates to a process for polymerizing at least one olefin with the aid of a catalyst containing at least one organometallic compound of a transition metal possessing at least one ligand of cyclopentadienyl or substituted cyclopentadienyl type. The polymerization is carried out in gas phase or in suspension in a liquid polymerization medium selected amongst saturated or unsaturated hydrocarbons, in the presence of hydrogen and a polymlerization component selected amongst halogenated hydrocarbons. The combined use of hydrogen and halogenated hydrocarbon in such a polymerization process simultaneously improves the catalyst activity and the molecular weight control of the polymer.
摘要:
L'invention concerne un procédé de préparation de polyéthylène ou d'un copolymère de l'éthylène et d'une oléfine comprenant de trois à vingt atomes de carbone, caractérisé en ce qu'il comprend une étape de polymérisation ou de copolymérisation de l'éthylène en présence d'un composé phosphoré comprenant un groupement phosphoryle. Le procédé selon l'invention mène à un polymère ou copolymère à l'indice de fusion relevé.
摘要:
The olefin polymer composition according to the invention comprises [I] an α-olefin/polyene copolymer-containing polymer in an amount of 0.005 to 99 by weight, said α-olefin/polyene copolymer-containing polymer comprising (i) an α-olefin/polyene copolymer and (ii) an olefin polymer, and [II] an olefin polymer in an amount of 1 to 99.995 % by weight. The olefin polymer composition comprising the α-olefin/polyene copolymer-containing polymer [I] and the olefin polymer [II] has a high melt tension and an excellent moldability in an inflation molding, and further it can be molded into a large sized container, etc. by means of a blow molding or the like.
摘要:
The present invention relates to an improved catalyst delivery method for introducing a supported bulky ligand metallocene-type catalyst system to a reactor for polymerizing one or more olefin(s). In particular, the invention provides for a method of introducing a supported metallocene-type catalyst system into a polymerization reactor by and in the presence of a carrier solution of an antistatic agent and a liquid diluent. Also, the invention is directed toward a catalyst feeder for use in a polymerization process.
摘要:
There is provided by the invention a prepolymerized catalyst [I] being obtained by prepolymerizing an α-olefin and an polyene compound to [A] a transition metal compound catalyst component and [B] an organometallic compound catalyst component containing a metal selected from metals in Group I to Group III of a periodic table in the total amounts of the α-olefin and the polyene compound of 0.01 to 2,000 g per 1 g of the transition metal compound catalyst component [A]. There is also provided by the invention a catalyst for olefin polymerization formed from [I] the prepolymerized catalyst and [II] an organometallic compound catalyst component containing a metal selected from metals in Group I to Group III of a periodic table. The polymerization process of olefin according to the invention is characterized by polymerizing or copolymerizing olefin in the presence of the catalyst for olefin polymerization. The olefin polymer of the invention is an α-olefin/polyene copolymer-containing olefin polymer comprising (i) an α-olefin/polyene copolymer.