Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1993-11-09
1995-09-26
Wu, David W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526151, 526281, 526282, 502110, C08F 206, C08F 468
Patent
active
054534739
ABSTRACT:
A process for producing EP and EPDM polymers with a reduction in fouling is provided, which process comprises polyemrizing ethylene, an alpha-olefin and a nonconjugated diolefin (if utilized) in a polymerization medium comprising a hydrocarbon diluent at a temperature of from about -50.degree. C. to about 150.degree. C. in the presence of a catalyst system comprising (a) a vanadium compound, (b) diethyl aluminum chloride, ethyl aluminum sesquichloride or ethyl aluminum dichloride and (c) an organo aluminum compound of the formula R.sub.3 Al wherein R is an alkyl group having from 8 to 12 carbon atoms and, optionally, triethyl aluminum, the molar ratio of chloride in diethyl aluminum chloride to the total aluminum content in (b) and (c) being from about 0.7:1 to about 0.95:1, the molar ratio of the chloride in ethyl aluminum sesquichloride to the total aluminum content in (b) and (c) being from about 0.7:1 to about 1.4:1 and the molar ratio of the chloride in ethyl aluminum dichloride to the total aluminum content in (b) and (c) being from about 0.7:1 to about 1.8:1 and the ratio of the mols of vanadium compound to the total mols of diethyl aluminum chloride and ethyl aluminum sesquichloride being from about 1:10 to about 1:50 to the desired conversion.
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Knauf Thomas F.
Osman Akhtar
Padliya Dilipkumar
Akorli Godfried R.
Bayer Rubber Inc.
Gil Joseph C.
Wu David W.
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