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US 2003/0120001 A1Published application
Polymerisation process
AssigneeBP Chemicals Limited
InventorsLeigh T Canham, Michael Charles L Ward
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AssigneeBP Chemicals Limited
InventorsLeigh T Canham, Michael Charles L Ward
Estimating the term…
A process for producing a poly-olefin is disclosed, which comprises contacting at least one 1-olefin under polymerisation conditions with a polymerisation catalyst or catalyst system comprising (1) a compound having the Formula (I) wherein M is Fe[I], Fe[III], Co[I], Co [II], Co[III], Mn[I], Mn[II], Mn[III], Mn[IV], Ru[II], Ru[III], Ru[IV], V[II], V[III], V[IV], or V[V], Ti[II], Ti[III] or Ti[IV]; X represents an atom or group covalently or ionically bonded to the transition metal M; T is the oxidation state of the transition metal M and b is the valency of the atom or group X, R1, R2, R3, R4, R5, R6 and R7 are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; and when any two or more of R1-R7 are hydrocarbyl, substited hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl, said two or more can be linked to form one or more cyclic substituents; and optionally (2) an activating quantity of an activator compound comprising a Lewis acid capable of activating the catalyst for olefin polymerisation; and then subjecting the resulting polyolefin to crosslinking conditions. The polymer produced can be formed into shaped articles or films with desirable physical properties.
A process for producing a polyolefin, comprising contacting at least one 1-olefin under polymerisation conditions with a polymerisation catalyst or catalyst system comprising (1) a compound having the Formula (I)
A process for producing a shaped or moulded polyolefin article or polyolefin in the form of a film, comprising
Process according to any preceding claim wherein in the compound of Formula (I), R5 is represented by the group “P” and R7 is represented by the group “Q” as follows:
Process according to any preceding claim wherein in the compound of Formula (I), X is selected from chloride, bromide, methyl, ethyl, propyl, butyl, octyl, decyl, phenyl, benzyl, methoxide, ethoxide, isopropoxide, tosylate, triflate, formate, acetate, phenoxide and benzoate.
Process according to any preceding claim wherein the activator compound comprises trimethylaluminium (TMA), triethylaluminium (TEA), tri-isobutylaluminium (TIBA), tri-n-octylaluminium, methylaluminium dichloride, ethylaluminium dichloride, dimethylaluminium chloride, diethylaluminium chloride, ethylaluminiumsesquichloride, methylaluminiumsesquichloride, or an alumoxane.
Process according to any preceding claim wherein the crosslinking agent is peroxide.
Process according to any preceding claim wherein the polymerisation is conducted in the presence of hydrogen as a molecular weight modifier.
Process according to any preceding claim wherein the polymerisation conditions are solution phase, slurry phase or gas phase.
A shaped article or film comprising crosslinked polymer formed from polymerisation of ethylene using a catalyst comprising a compound of Formula (I) as defined above.
A film made from polyethylene produced in a single reactor, having a relationship M>−6.58D2+148.82D−90,
A film made from polyethylene having a relationship M>−6.58D2+148.82D+20,
A crosslinked polyolefin composition having a residual iron content of from 0.001 to 1 ppm.
Dependencies are inferred from the claim text.