Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1991-07-08
1992-11-10
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
502125, 526132, 526133, 526352, 526909, C08F 4651, C08F 4654, C08F 1000
Patent
active
051624648
ABSTRACT:
A process for producing a polyolefin, which comprises polymerizing at least one olefin in the presence of a catalyst system comprising (A) a solid catalyst component (A) obtained by reacting to a uniform solution containing (i) at least one member selected from the group consisting of metallic magnesium and an organic hydroxide compound, and an oxygen-containing organic magnesium compound, and (ii) at least one oxygen containing organic titanium compound, (iii) at least one organic aluminum compound, (iv) at least one boron compound having an alkoxy group, and (v) at least one aluminum halide compound; and (B) at least one catalyst component (B) selected from the group consisting of organic metal compounds of metals of Groups Ia, IIa, IIb, IIIb and IVb of the Periodic Table.
REFERENCES:
patent: 3901863 (1975-08-01), Berger et al.
patent: 4209601 (1980-06-01), Kuroda et al.
patent: 4339351 (1982-07-01), Mashita et al.
patent: 4804726 (1989-02-01), Kondo et al.
Kondo Yozo
Mori Mitsuhiro
Sato Morihiko
Smith Edward J.
Tosoh Corporation
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