High temperature solution polymerization process

Details High temperature solution polymerization process High temperature solution polymerization process

1995-10-20

1997-04-29

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526126, 526127, 526132, 526133, 526134, 526170, 526282, 526283, 526336, 526912, C08F 4643, C08F 204, C08F21018

Patent

active

056250169

ABSTRACT:
This invention is a solution process for the preparation of high molecular weight ethylene-.alpha.-olefin-diolefin copolymers comprising contacting ethylene, one or more .alpha.-olefin monomer, and optionally one or more diene monomer, with a catalyst system at a polymerization temperature at or above about 80.degree. C., ethylene, one or more .alpha.-olefin monomer, and optionally one or more diene monomer, with a catalyst system comprising an unbridged Group 4 metal compound having a bulky monocyclopentadienyl ligand, a uninegative bulky Group 15 ligand and two uninegative, activation reactive ligands and a catalyst activator compound. The process can be advantageously practiced a reaction temperature of at least 80.degree. C., most preferably above 100.degree. C., to achieve high number average molecular weight polymer having high .alpha.-olefin monomer and diene monomer contents with high diene conversion rates. The process is particularly suitable for the preparation of elastomeric ethylene-propylene or ethylene-propylene-diene monomer elastomers.

REFERENCES:
patent: 5264405 (1993-11-01), Canich
patent: 5321106 (1994-06-01), LaPointe
patent: 5408017 (1995-04-01), Turner et al.
patent: 5502017 (1996-03-01), Marks et al.
"Dialkylamido derivative of [(.eta..sup.5 -C.sub.5 Me.sub.5)TiCl.sub.3 ], [{(.eta..sup.5 -C.sub.5 Me.sub.5 TiCl.sub.2 }.sub.2 (.mu.-O)] and [{(.eta..sup.5 -C.sub.5 Me.sub.5 TiCl}.sub.3 (.mu.-O)]: X-ray crystal structure of [(.eta..sup.5 -C.sub.5 Me.sub.5)Ti(NMe.sub.2).sub.3 ]", Mart'n et al, Journal of Organometallic Chemistry, 467 (1994), 79-84.

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