Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
450 words
A process of producing a polyolefin using a catalyst system comprising a transition metal component of the following general formula: wherein: M is Zr, Hf or Ti and is in its highest formal oxidation state (+4, d O complex); (C 5 H 5-y-x R x ) is a cyclopentadienyl ring which is substituted with from zero to five substituent groups R, "x" is O, 1, 2, 3, 4 or 5 denoting the degree of substitution, and each substituent group R is, independently, a radical selected from a group consisting of C 1 -C 20 hydrocarbyl radicals, substituted C 1 -C 20 hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, C 1 -C 20 hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the Group IV A of the Periodic Table of Elements, and halogen radicals, or (C 5 H 5-y-x R x ) is a cyclopentadienyl ring in which two adjacent R-groups are joined forming a C 4 -C 2 o ring to give a polycyclic cyclopentadienyl ligand. (JR' z-x-y ) is a heteroatom ligand in which J is an element with a coordination number of three from Group VA or and element with a coordination number of two from Group VI A of the Periodic Table of Elements, and each R' is, independently a radical selected from a group consisting of C 1 -C 20 hydrocarbyl radicals, substituted C 1 -C 20 hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, and "z" is the coordination of number of the element J; each Q may be independently, hydride, C 1 -C 50 hydrocarbyl radicals, substituted hydrocarbyl radicals wherein one or more hydrogen atom is replaced by an electron-withdrawing group such as a halogen atom, or alkoxide radical, or C 1 -C 50 hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the Group IV-A of the Periodic Table of Elements, provided that where any Q is a hydrocarbyl such Q is different from or both Q together may be an alkylidene, olefin, acetylene or a cyclometalled hydrocarbyl, "y" is 0 or 1; when "y" is 1, B is a covalent bridging group containing a Group IV A or V A element, L is a neutral Lewis base; and "w" is a number from O to 3 and as an activator component [A]- which is a labile, bulky anion which is either a single coordination complex having a plurality of lipophilic radicals covalently coordinated to and shielding a charge bearing metal or metalloid centre or an anionic complex containing a plurality of boron atoms, the mol ratio of transition metal component to activator component being from 10:1 to 200:1.
Claim 2
Dependent Claim
450 words
A process of producing a polyolefin using a catalyst system comprising a transition metal component of the following general formula: wherein: M is Zr, Hf or Ti and is in its highest formal oxidation state (+4, d O complex); (C 5 H 5-y-x R x ) is a cyclopentadienyl ring which is substituted with from zero to five substituent groups R, "x" is O, 1, 2, 3, 4 or 5 denoting the degree of substitution, and each substituent group R is, independently, a radical selected from a group consisting of C 1 -C 20 hydrocarbyl radicals, substituted C 1 -C 20 hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, C 1 -C 20 hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the Group IV A of the Periodic Table of Elements, and halogen radicals, or (C 5 H 5-y-x R x ) is a cyclopentadienyl ring in which two adjacent R-groups are joined forming a C 4 -C 2 o ring to give a polycyclic cyclopentadienyl ligand. (JR' z-x-y ) is a heteroatom ligand in which J is an element with a coordination number of three from Group VA or and element with a coordination number of two from Group VI A of the Periodic Table of Elements, and each R' is, independently a radical selected from a group consisting of C 1 -C 20 hydrocarbyl radicals, substituted C 1 -C 20 hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, and "z" is the coordination of number of the element J; each Q may be independently, hydride, C 1 -C 50 hydrocarbyl radicals, substituted hydrocarbyl radicals wherein one or more hydrogen atom is replaced by an electron-withdrawing group such as a halogen atom, or alkoxide radical, or C 1 -C 50 hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the Group IV-A of the Periodic Table of Elements, provided that where any Q is a hydrocarbyl such Q is different from or both Q together may be an alkylidene, olefin, acetylene or a cyclometalled hydrocarbyl, "y" is 0 or 1; when "y" is 1, B is a covalent bridging group containing a Group IV A or V A element, L is a neutral Lewis base; and "w" is a number from O to 3 and as an activator component [A]- which is a labile, bulky anion which is either a single coordination complex having a plurality of lipophilic radicals covalently coordinated to and shielding a charge bearing metal or metalloid centre or an anionic complex containing a plurality of boron atoms, the mol ratio of transition metal component to activator component being from 10:1 to 200:1.
Claim 3
Dependent Claim
36 words
Process according to claim 1 comprising the steps of contacting ethylene or other unsaturated monomers, either alone or in combination with other olefins and/or other unsaturated monomers, with the catalyst system in a suitable polymerisation diluent.
Claim 4
Dependent Claim
48 words
Process according to claim 2 in which the catalyst system is separately prepared in concentrated form and added to the polymerisation diluent or wherein the components of the catalyst system are prepared as separate solutions and added to the polymerisation diluent to form the catalyst system in situ.
Claim 5
Dependent Claim
17 words
Process according to claim 1 in which the catalyst system is adsorbed or reacted onto a support
Claim 6
Dependent Claim
13 words
Process according to claim 1 in which the polymerisation is in liquid phase.
Claim 7
Dependent Claim
20 words
Process according to any of claims 1 to 5 wherein the heteroatom ligand group is nitrogen, phosphorus, oxygen or sulphur.
Claim 8
Dependent Claim
56 words
Process according to claim fin which y = 1 and B is a linear, branched or cyclic alkylene group having from 1 to 6 carbon atoms, an alkyl substituted sila alkylene group having from 1 to 2 silicone atoms in place of carbon atoms in the bridge or a Si, -Si 2 alkyl substituted silanylene group.
Claim 9
Dependent Claim
36 words
Process according to any of the preceding claims 1 to 7 wherein R' is a straight and branched alkyl radicals, cyclic hydrocarbon radicals, alkyl substituted cyclic hydrocarbon radicals, aromatic radicals or an alkyl substituted aromatic radical.
Claim 10
Dependent Claim
29 words
Process according to any of the preceding claims 1 to 8 in which the anion contains substituted phenyl rings preferably an ortho alkyl substituted phenyl ring or is perfluorsubstituted.
Claim 11
Dependent Claim
23 words
Process according to any of claims 1 to 9 which produces a polyolefin having a molecular weight distribution of from 1.5 to 3.0.