Process for preparing polyolefins

Details Process for preparing polyolefins Process for preparing polyolefins

1979-06-06

1983-10-18

Henderson, C. A.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502102, 502105, 502127, 526124, C08F 466

Patent

active

044106700

ABSTRACT:
This invention provides a process for preparing polyolefins using a new catalyst. According to this invention, .alpha.-olefins can be polymerized or copolymerized to have good stereoregularity and at a high activity by the use of such new catalyst. The new catalyst used in this invention consists of [A] a solid component obtained by contacting (1) a magnesium oxide, (2) an aluminum trihalide, (3) a hydroxy compound represented by the general formula ROH wherein R is an organic radical having 1 to 20 carbon atoms and (4) a titanium halide and/or an addition product of a titanium halide and an aromatic carboxylic acid ester, and [B] an organometallic compound and/or an addition product of an organometallic compound and an aromatic carboxylic acid ester; or it consists of the solid component of the above [A], the organometallic compound and/or the addition product of an organometallic compound and an aromatic carboxylic acid ester of the above [B], and [C] an aromatic carboxylic acid ester. The said catalyst is prepared, in one of the most preferred embodiments thereof, by using the solid component of the above [A] which is obtained by first co-pulverizing the compounds of the above (1),(2) and (3), then washing the co-pulverized product with an aromatic compound, separating the liquid phase to give a solid substance (a) and contacting the latter with the compound and/or the addition product of the above (4).

REFERENCES:
patent: 4061857 (1977-12-01), Kuroda
patent: 4081589 (1978-03-01), Peters
patent: 4083802 (1978-04-01), Matsuura
patent: 4087380 (1978-05-01), Hyde
patent: 4103078 (1978-07-01), Sato
patent: 4128502 (1978-12-01), Kildahl

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