Method for producing a stereospecific polyolefin

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

1991-08-23

1993-07-20

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502119, 502125, 526128, 526132, 526133, 526155, 526903, 526904, C08F 4651, C08F 4654, C08F 1006

Patent

active

052294765

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 a homogeneous solution containing (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 and 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, and further reacting to this solid product (iii) an electron-donative compound, (iv) a titanium halide compound, and (v) ethylene and/or an .alpha.-olefin having at least 3 carbon atoms, (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. A highly stereospecific polymer having good configuration of particles can be obtained in good yield by the method of the present invention.

REFERENCES:
patent: 4130699 (1978-12-01), Hoff et al.
patent: 4405769 (1983-09-01), Capshew et al.
patent: 4463145 (1984-07-01), Sunada et al.
patent: 4478951 (1984-10-01), Huff
patent: 4543400 (1985-09-01), Wristers
patent: 4579836 (1986-04-01), Arzouanidis et al.

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