Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1987-09-10
1992-01-28
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526339, 5263482, 5263485, 5263486, 526352, 526902, C08F 4642, C08F 1002
Patent
active
050845349
ABSTRACT:
A process for polymerizing or copolymerizing ethylene, either alone or in combination with other olefins, comprising contacting said ethylene or alpha-olefin, either alone or in combination with other olefins, with a catalyst comprising a cyclopentadienyl-transition metal compound and an alumoxane compound at an elevated temperature and pressure and wherein the ratio of aluminum in the alumoxane to the total metal in the metallocene is in the range of 1000:1 to 0.5:1.
REFERENCES:
patent: 4404344 (1983-09-01), Sinn et al.
patent: 4530914 (1985-07-01), Ewen et al.
patent: 4542199 (1985-09-01), Kaminsky et al.
patent: 4565647 (1986-01-01), Llenado
patent: 4752597 (1988-06-01), Turner
patent: 4808561 (1989-02-01), Welborn
Ziegler Natta Catalysis by H. Sinn and W. Kaminski, Advances in Organo Metallic Chemistry, 18, 99 (1980).
Halogen Free Soluble Ziegler Catalysis with Methylalumoxane as Catalysts by J. Herwig and W. Kaminski in Polymer Bulletin 9, 464 (1983).
Homogeneous Ziegler Natta Catalysis II by E. Giannetti et al., Journal of Polymer Science, 23, 2117-2133 (1985).
Herwig et al., Polymer Bulletin 9, 464-469 (1983).
Speed Charles S.
Welborn, Jr. Howard C.
Cadenhead B. C.
Exxon Chemical Patents Inc.
Kurtzman M. B.
Smith Edward J.
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