Preparation of homopolymers and copolymers of .alpha.-monoolefin

Details Preparation of homopolymers and copolymers of .alpha.-monoolefin Preparation of homopolymers and copolymers of .alpha.-monoolefin

1984-11-20

1986-04-01

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, 502133, 526124, 526351, C08F 402, C08F 1000

Patent

active

045799199

ABSTRACT:
.alpha.-Monoolefins are polymerized using a catalyst system which comprises (1) a titanium component obtained by first (1.a) preparing an intermediate from (1.a.1) titanium tetrachloride, (1.a.2) a modifier and (1.a.3) a magnesium alcoholate, and the (1.b) preparing the titanium component from (1.b.1) titanium tetrachloride, (1.b.2) the intermediate from (1.a) and, if required, (1.b.3) a further modifier, (2) an alkylaluminum and (3) a cocatalyst. In this process, (i) the titanium component (1) used is obtained by first (1.1) preparing a first intermediate from (1.1.1) titanium tetrachloride, (1.1.2) a modifier obtained from (1.1.2.1) a titanate and (1.1.2.2) a phthaloyl dichloride, and (1.1.3) a magnesium alcoholate, then (1.2) preparing a second intermediate from (1.2.1) titanium tetrachloride, (1.2.2) the intermediate from (1.1) and, if required, (1.2.3) a phthaloyl dichloride as a further modifier, and finally (1.3) preparing the titanium component from (1.3.1) titanium tetrachloride and (1.3.2) the intermediate from (1.2), and (ii) the cocatalyst (3) used is a trialkoxysilane.

REFERENCES:
patent: 4180636 (1979-12-01), Hirota et al.
patent: 4220554 (1980-09-01), Scata et al.
patent: 4224184 (1980-09-01), Staiger
patent: 4456695 (1984-06-01), Nimura et al.

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