Ethylene polymerization

Details Ethylene polymerization Ethylene polymerization

1975-11-25

1979-01-09

Holler, Alan

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

Synthetic resins

Polymerizing in two or more physically distinct zones

526104, 526106, 526123, 526130, 526154, 526159, 526170, 526171, 5263483, 5263484, 5263485, 5263486, C08F 1002, C08F 1008, C08F 1014

Patent

active

041339444

ABSTRACT:
Ethylene is polymerised or copolymerised using a transition metal catalyst at a pressure in the range 300-1000 atmospheres and a temperature of at least 100.degree. C in the presence of a volatile inert diluent such as pentane, or at least one 1-olefine comonomer such as buten-1, or both. The catalyst can be a Ziegler type catalyst, an organo-compound of a transition metal such as a substituted silylmethyl, cyclopentadienyl, arene, norbornyl, .pi.-allyl or benzyl compound and may be supported on a suitable support such as silica, alumina, or magnesia. Other catalysts which may be used are supported chromium or molybdenum oxides. If a solid catalyst is used it is preferred to use a material which has been finely dispersed.

REFERENCES:
patent: 2882264 (1959-04-01), Barnes et al.
patent: 2953552 (1960-09-01), Stampa et al.
patent: 3073809 (1963-01-01), Kluiber et al.
patent: 3309350 (1967-03-01), Kelley et al.
patent: 3654254 (1972-04-01), Job et al.
patent: 3732198 (1973-05-01), Whiteley et al.
patent: 4014859 (1977-03-01), Cooper et al.

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