Process and catalyst for producing reactor blend polyolefins

Claim 2

A homogeneous catalyst system for the simultaneous production of a polymer blend in a single polymerization reactor of two or more polymers comprising homopolyethylene and an ethylene-alpha-olefin copolymer, said catalyst comprising (a) at least two different mono, di or tricyclopentadienyls and their derivatives of a Group 4b, 5b and 6b transition metal each having different reactivity ratios and (b) an alumoxane.

Claim 3

A homogeneous catalyst system for the simultaneous production of a polymer blend in a single polymerization reactor of two or more polymers comprising polyethylene and an ethylene-alpha-olefin copolymer, said catalyst comprising: (a) at least two metallocenes represented by the general formula (C 5 R' m ) p R' s (C 5 R' m )MeQ 3-p or R" s (C 5 R' m ) 2 MeQ; each having different reactivity ratios, and (b) and alumoxane wherein (C 5 R' m ) is a cyclopentadienyl or substituted cyclopentadienyl, each R' which can be the same or different is hydrogen or a hydrocarbyl radical such as alkyl, alkenyl, aryl, alkylaryl, or arylakyl radicals having form 1 to 20 carbon atoms or two carbon atoms are joined together to form a C 4 -C 6 ring, R" is a C 1 -C 4 alkylene radical, a dialkyl germanium or silicone, or an alkyl phosphine or amine radical bridging two (C 5 R' m ) rings, Q is a hydrocarbon radical such as aryl, alkyl, alkenyl, alkylaryl, or arylakyl radicals having from 1-20 carbon atoms or halogen and can be the same or different, Q' is an alkylidene radical having from 1 to about 20 carbon atoms, Me is a transition metal of Group 4b, 5b and 6b, s is 0 or 1, p is 0, 1 or 2, when p=0, s=0, m is 4 when s is 1, m is 5 when s is 0.

Claim 4

A homogeneous catalyst system for the simultaneous production of a polymer blend in a single polymerization reactor of two or more polymers comprising polyethylene and an ethylene-alpha-olefin copolymer, said catalyst comprising: (a) at least two metallocenes represented by the general formula (C 5 R' m ) p R' s (C 5 R' m )MeQ 3-p or R" s (C 5 R' m ) 2 MeQ; each having different reactivity ratios, and (b) and alumoxane wherein (C 5 R' m ) is a cyclopentadienyl or substituted cyclopentadienyl, each R' which can be the same or different is hydrogen or a hydrocarbyl radical such as alkyl, alkenyl, aryl, alkylaryl, or arylakyl radicals having form 1 to 20 carbon atoms or two carbon atoms are joined together to form a C 4 -C 6 ring, R" is a C 1 -C 4 alkylene radical, a dialkyl germanium or silicone, or an alkyl phosphine or amine radical bridging two (C 5 R' m ) rings, Q is a hydrocarbon radical such as aryl, alkyl, alkenyl, alkylaryl, or arylakyl radicals having from 1-20 carbon atoms or halogen and can be the same or different, Q' is an alkylidene radical having from 1 to about 20 carbon atoms, Me is a transition metal of Group 4b, 5b and 6b, s is 0 or 1, p is 0, 1 or 2, when p=0, s=0, m is 4 when s is 1, m is 5 when s is 0.

Claim 5

The catalyst system of claim 2 wherein Me is selected from zirconium and titanium.

Claim 6

The catalyst system of claim 3 wherein Q is selected from the group consisting of methyl, phenyl or chloride.

Claim 7

The catalyst system of claim 3 comprising at least 2 zirconocenes.

Claim 8

The catalyst system of claim 3 comprising at least 1 titanocenes and 1 zirconocene.

Claim 9

The catalyst system of claim 4 comprising bis(methylcyclopentadienyl) zirconium dichloride and bis(pentamethylcyclopentadiethyl)zirconium dichloride.

Claim 10

A process for the simultaneous production in a single polymerization reactor of a blend of two or more polymers comprising polyethylene and ethylene-alpha-olefin copolymer comprising polymerizing ethylene and at least one alpha-olefin simultaneously in the presence of the catalyst system of claim 1.

Claim 11

A process for producing a reactor blend comprising polymerizing ethylene and at least one alpha-olefin simultaneously in the presence of the catalyst system of claim 2.

Claim 12

A process for producing a reactor blend comprising polymerizing ethylene and at least one alpha-olefin simultaneously in the presence of the catalyst system of claim 3.

Claim 13

A process for producing a reactor blend comprising polymerizing ethylene and at least one alpha-olefin simultaneously in the presence of the catalyst system of claim 4.

Claim 14

A process for producing a reactor blend comprising polymerizing ethylene and at least one alpha-olefin simultaneously in the presence of the catalyst system of claim 5.

Claim 15

A process for producing a reactor blend comprising polymerizing ethylene and at least one alpha-olefin simultaneously in the presence of the catalyst system of claim 6.

Claim 16

A process for producing a reactor blend comprising polymerizing ethylene and at least one alpha-olefin simultaneously in the presence of the catalyst system of claim 7.

Claim 17

The process of claim 8 wherein the polymer blend comprises a blend of polyethylene and an ethylene-propylene copolymer.

Claim 18

The process of claim 15 wherein the polyethylene is linear low density polyethylene.

Claim 19

The process of claim 15 wherein the polyethylene is high density polyethylene.