Process for producing polyethylene

Details Process for producing polyethylene Process for producing polyethylene

1978-07-27

1979-09-25

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252431R, 526141, 526163, 526352, C08F 468, C08F 1002

Patent

active

041691946

ABSTRACT:
A process for producing polyethylene comprising polymerizing ethylene in a medium of a hydrocarbon solvent at a temperature within the range of from 30.degree. to 110.degree. C. under a pressure of from 1 to 60 atm.g. in the presence of a complex organometallic catalyst; said catalyst consisting of an alkylaluminiumhalide of the formula AlR.sub.n (X).sub.3-n (I), wherein R is an alkyl with a number of carbon atoms from 2 to 18; X is Cl, Br, I; n=1 or 2; an oxyvanadiumalkoxide of the formula OV(OR').sub.3 (II), wherein R' is an alkyl with a number of carbon atoms from 2 to 20; and a complex of acrylonitrile with diethylaluminiumchloride of the formula CH.sub.2 =CHCN.Al(C.sub.2 H.sub.5).sub.2 Cl (III); molar ratio between said catalytic components I:II:III being equal to 5-20:1:1-5, respectively. The process makes it possible to obtain polyethylene with a wide (5 to 10) molecular-mass distribution and with an enhanced adhesion to a metal (more than 3000 g/cm). Polyethylene possessing the above-cited characteristics is readily processed by the extrusion method to articles of household and industrial applications.

REFERENCES:
patent: 3313794 (1967-04-01), Cleary
patent: 3400113 (1968-09-01), Winter et al.

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