摘要:
A support for use in preparing supported catalysts for addition polymerizations comprising the reaction product of: (A) an inorganic oxide material comprising reactive surface hydroxyl groups, at least some of said hydroxyl groups optionally having been functionalized and converted to a reactive silane moiety corresponding to the formula: -OSiR2H, wherein R, independently each occurrence, is hydrogen, C1-20 hydrocarbyl, or C1-20 hydrocarbyloxy, said inorganic oxide or functionalized derivative thereof comprising less than 1.0 mmol of reactive surface hydroxyl functionality per gram; and (B) an activator compound comprising: b1) a cation which is capable of reacting with a transition metal compound to form a catalytically active transition metal complex, and b2) a compatible anion containing at least one substituent able to react with the inorganic oxide, with residual hydroxyl functionality of the inorganic oxide, or with the reactive silane moiety, thereby covalently bonding the compatible anion to the support; catalysts formed therefrom, process of manufacture and the method of use.
摘要:
Metal complexes corresponding to formula (I), wherein L independently each occurrence is a delocalized, π-bonded group that is bound to M, containing up to 50 non-hydrogen atoms; M is a metal of Group 3, 4 or the Lanthanide series of the Periodic Table of the Elements; Z is a covalently bound, divalent substituent of up to 50 non-hydrogen atoms having the formula -(ER2)m-, wherein E independently each occurrence is carbon, silicon or germanium, R independently each occurrence is selected from the group consisting of C1-20 hydrocarbyl, and C1-20 hydrocarbyloxy, with the proviso that in at least one occurrence R is C1-20 hydrocarbyloxy, and m is an integer from 1 to 3; X' is a neutral Lewis base ligand having up to 20 non-hydrogen atoms; X' independently each occurrence is a monovalent, anionic moiety selected from hydride, halo, hydrocarbyl, silyl, germyl, hydrocarbyloxyl, amide, siloxy, halohydrocarbyl, halosilyl, silylhydrocarbyl, and aminohydrocarbyl having up to 20 non-hydrogen atoms, or two X' groups together form a divalent hydrocarbadiyl or neutral hydrocarbon group; n is a number from 0 to 3; and p is an integer from 0 to 2.
摘要:
Constrained geometry metal complexes that are useful in the preparation of catalysts for olefin polymerizations are prepared by contacting cyclopentadienyl compounds with metal compounds.
摘要:
Addition polymerization catalysts comprising a derivative of a titanium or zirconium in the +4 oxidation state prepared by metal center oxidation and cation complex formation of a reduced metal precursor complex via electron transfer in a single step by use of a neutral organic oxidant, optionally in the presence of a Lewis acid mitigator.
摘要:
Novel metal complexes containing at least two heteroatoms attached to an indenyl or substituted indenyl radical which is bridged by ligand group thereby forming a covalent or coordinate/covalent bond to the metal, the use of such metal complexes in the formation of polymerization catalysts and processes for polymerizing α-olefins using such catalysts.
摘要:
A catalyst activator particularly adapted for use in the activation of metal complexes of metals of Group 3-10 for polymerization of ethylenically unsaturated polymerizable monomers, especially olefins, comprising a zwitterionic compound corresponding to the formula (I) or (II), wherein: L+ is a protonated derivative of an element of Group 15 of the Periodic Table of the Elements, additionally bearing two hydrocarbyl substituents of from 1 to 50 carbons each, or a positively charged derivative of an element of Group 14 of the Periodic Table of the Elements, said Group 14 element being substituted with three hydrocarbyl substituents of from 1 to 50 carbons each; R1 is a divalent linking group of from 1 to 40 non-hydrogen atoms; R2 independently each occurrence is a ligand group of from 1 to 50 nonhydrogen atoms with the proviso that in a sufficient number of occurrences to balance charge in the compound. R?2 is L+-R1-; R4¿ is a bridging hydride or halide group or a divalent linking group of from 1 to 40 non-hydrogen atoms; M1 is boron, aluminum or gallium; Arf independently each occurrence is a monovalent, fluorinated organic group containing from 6 to 100 non-hydrogen atoms; Y is a Group 15 element; and Z is a Group 14 element.