摘要:
The present invention is intended to provide an olefin polymerization catalyst comprising a transition metal compound and having an excellent olefin polymerization activity and to provide a process for olefin polymerization using this catalyst. The olefin polymerization catalyst comprises a transition metal compound (A-2) represented by the formula (II-b) and further comprises at least one compound (B) selected from the group consisting of an organometallic compound (B-1), an organoaluminum oxy-compound (B-2) and a compound (B-3) which reacts with the transition metal compound (A-2) to form an ion pair.
(wherein M, m, A, R 1 , R 2 , R 7 - R 10 , n and X are further defined in the specification).
摘要:
An olefin polymerization catalyst having an excellent polymerization activity and an olefin polymerization process using the catalyst are disclosed. The olefin polymerization catalyst comprises (A) a transition metal compound represented by, for example, the following formula (I) and optionally (B) at least one compound selected from an organometallic compound, an organoaluminum oxy-compound and a compound which reacts with the transition metal compound (A) to from an ion pair; wherein M is a transition metal atom of Group 3 to Group 11 of the periodic table; m is an integer of 1 to 6; A is -O-, -S-, -Se- or -N(R5)-; D is -C(R 7 )(R 8 )-, -Si(R 9 )(R 10 )- or the like; Z is -R 13 and -R 14 , =C(R 15 )R 16 , =NR 17 or the like; R 1 to R 17 are each H, a hydrocarbon group or the like; n is a number satisfying a valence of M; and X is halogen, a hydrocarbon group or the like.
摘要:
A novel olefin polymerization catalyst is provided which comprises (A) a transition metal compound or lanthanoid compound containing two or more atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur, and selenium; and (B) a Lewis acid. A process for producing an olefin polymer is alsoprovided. The catalyst has a high olefin polymerization activity without a combined use of an expensive organoaluminum oxy-compound or organoboron compound, and can maintain the high activity for a long polymerization time.
摘要:
The invention provides olefin polymerization catalyst exhibiting excellent polymerization activities, a process for olefin polymerization using the catalyst, a novel transition metal compound useful for the catalyst, and an α-olefin/conjugated diene copolymer having specific properties. The olefin polymerization catalyst of the invention comprises (A) a transition metal compound of formula (I) or (II), and (B) an organometallic compound, an oranoaluminum oxy-compound or an ionizing ionic compound. The novel transition metal compound of the invention is a compound of formula (I) wherein M is a transition meal atom of Group 3 or 4 of the periodic table; m is an integer of 1 to 3; R 1 is a hydrocarbon group, etc.; R 2 to R 5 are each H, a halogen, a hydrocarbon group, etc.; R 6 is a halogen, a hydrocarbon group, etc.; n is a number satisfying a valence of M; and X is a halogen, a hydrocarbon group, etc.
摘要:
The present invention provides a tapered olefin copolymer having a narrow molecular weight distribution and a specific molecular weight, containing a segment wherein monomer composition continuously changes in the polymer chain and a process for preparing this polymer. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 2.5. In the process for preparing an olefin polymer, olefins of 2 to 20 carbon atoms are polymerized in the presence of an olefin polymerization catalyst comprising a transition metal compound represented by, for example, the following formula (I): L m MX n (I) wherein M is a transition metal atom of Group 3 to Group 11 of the periodic table, m is 1 to 5, n is a number satisfying a valence of M, L is a ligand coordinated to the central metal M and is a ligand containing a heteroatom having no direct bond to the central metal, and X is a halogen atom, a hydrocarbon group or the like.