Method for producing a stereospecific polyolefin

Details Method for producing a stereospecific polyolefin Method for producing a stereospecific polyolefin

1992-02-26

1993-09-14

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526124, 526128, 526134, 526351, 526348, 502113, 502125, C08F 4651, C08F 4654, C08F 1000

Patent

active

052449890

ABSTRACT:
A method for producing a stereospecific polyolefin in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein a catalyst system is used which comprises: (A) a solid catalyst component prepared by reacting (i) a homogeneous solution prepared by reacting (i-1) magnesium and a hydroxylated organic compound, (i-2) an oxygen-containing organic compound of titanium and/or (i-3) an oxygen-containing organic compound of silicon, with an oxygen-containing organic compound of aluminum and/or a boron compound, with (ii) at least one aluminum halide compound to obtain a solid product, reacting to this solid product (iii) an electron-donative compound and (iv) a titanium halide compound to obtain a solid component, and further reacting to this solid component (v) silicon tetrachloride and/or an alkyl-substituted product of silicon tetrachloride, (B) at least one member selected from the group consisting of organometallic compounds of Groups IA, IIA, IIB, IIIB and IVB of the Periodic Table, and (C) an electron-donative compound.

REFERENCES:
patent: 4472521 (1984-09-01), Band
patent: 4748221 (1988-05-01), Collomb et al.
patent: 4904630 (1990-02-01), Matsuura et al.
patent: 5053467 (1991-10-01), Kondo et al.
patent: 5077250 (1991-12-01), Miyoshi et al.
WO 87/07899.

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