Abstract:
A heterogeneous catalyst composition suitable for olefinic polymerization and to methods of forming polyolefinic products using said composition. The catalyst composition comprises an anionic metalloid silane modified inorganic oxide and the cationic remnant of a transition metal bidentate or tridentate compound.
Abstract:
Process for the preparation of (co) polymers of conjugated dienes which comprises polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one oxo-nitrogenated complex of cobalt having general formula (I),wherein : - R 1 and R 2 , equal to or different from each other, represent a hydrogen atom; or they are selected from linear or branched C 1 -C 20 , preferably C 1 -C 15 , alkyl groups, optionally halogenated; cycloalkyl groups optionally substituted; aryl groups optionally substituted; - Y represents an oxygen atom; or a group -N-R 3 wherein R 3 represents a hydrogen atom, or it is selected from linear or branched C 1 -C 20 preferably C 1 -C 15 , alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted-; aryl groups optionally substituted; or, when Y represents a group -N-R 3 , R 2 and R 3 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C 1 -C 20 preferably C 1 -C 15 , alkyl groups, said cycle optionally containing heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; - X 1 and X 2 , equal to or different from each other, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C 1 -C 20 preferably C 1 -C 15 , alkyl groups, -OCOR 4 groups or -OR 4 groups wherein R 4 is selected from linear or branched C 1 -C 20 preferably C 1 -C 15 , alkyl groups.
Abstract:
A metal complex comprising a transition metal complex of a bidentate or tridentate, dithioether ligand having utility as a catalyst component of an olefin polymerization catalyst composition in combination with an activating co-catalyst.
Abstract:
Complex catalysts based on a metal of group VIII complexed with suitable ligands, particularly active in the homopolymerization of ethylene and in its copolymerization with another unsaturated monomer of the vinylic and acrylic type.
Abstract:
A catalyst for olefin polymerization which is highly active in olefin polymerization and with which a polyolefin having excellent properties can be produced; and a method of polymerizing an olefin using the catalyst. The catalyst comprises (A) a transition metal imine compound represented by general formula (I) and (B) at least one compound selected among (B-1) an organometallic compound, (B-2) an organoaluminumoxy compound, and (B-3) a compound which reacts with the compound (A) to form an ion pair.
Abstract:
The present invention relates to catalysts and/or catalyst systems useful for the polymerization or copolymerization of a-olefin. These catalysts contain O, S, Se, N, or P-containing transition metal compounds comprising the skeletal unit depicted in following formula (I): Wherein M is an element belonging to Group 3-11 of the Periodic Table; A, D and E each represent coordination group containing O, S, Se, N, or P atom.
Abstract:
A metal complex comprising a transition metal complex of a bidentate or tridentate, dithioether ligand having utility as a catalyst component of an olefin polymerization catalyst composition in combination with an activating co-catalyst.
Abstract:
A catalyst composition, and olefin polymerization process using same, formed from a mixture of a non-aluminoxane aluminum compound, an inorganic oxide and a transition metal bidentate or tridentate complex in certain prescribed proportions. The composition can be formed in a single step or in-situ in the polymerization reaction zone. The resultant catalyst has high activity and is capable of producing high molecular weight olefin products without reactor fouling.