Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1973-03-13
1978-07-25
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
252429B, 252429C, 526 97, 526121, 526124, 526129, 526132, 526347, 526348, 5263486, 526351, 526352, C08F 402
Patent
active
041030788
ABSTRACT:
Polymers of .alpha.-olefin such as polyethylene, polypropylene, copolymers of ethylene with propylene, butene-1 or styrene, are produced by the (co-) polymerization using a catalyst obtained by mill-mixing an oxide of a metal belonging to I, II, III, VII or VIII Group of the Periodic Table of Elements such as MgO or SiO.sub.2 or B.sub.2 O.sub.3, with a trivalent metal halide such as AlCl.sub.3, then reacting the resultant mixture with a transition metal compound such as TiCl.sub.4 in the presence of an aromatic compound such as xylene, and activating the resultant solid reaction product with an organoaluminum compound such as triethyl aluminum.
In the preparation of the present catalyst, no dehydrochlorination occurs. The present catalyst has an excellent utilization efficiency of transition metal compound in the polymerization. Further, no polymer film forms on the wall surface of the polymerization vessel.
REFERENCES:
patent: 3085999 (1963-04-01), Tung
patent: 3223690 (1965-12-01), Wilsher et al.
patent: 3257332 (1966-06-01), Ziegler et al.
patent: 3526616 (1970-09-01), Delbouille et al.
patent: 3535299 (1970-10-01), Dassesse et al.
patent: 3676415 (1972-07-01), Diedrich et al.
Kachi Atsuyuki
Konotsune Shiro
Sato Akihiro
Shimizu Hiroshi
Chisso Corporation
Philpitt Fred
Smith Edward J.
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