Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1983-10-03
1984-11-13
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, 502124, 502127, 526124, 526351, C08F 402, C08F 1006
Patent
active
044826869
ABSTRACT:
A process for the stereospecific polymerization of .alpha.-olefins which comprises polymerizing an .alpha.-olefin with a catalyst comprising (A) the reaction product of a magnesium compound and a titanium compound and (B) an organo-aluminum compound. Component (A) is prepared by reacting a (i) magnesium compound of the formula Mg(OR.sup.1).sub.n X.sup.1.sub.2-n wherein R.sup.1 contains from 1 to 10 carbon atoms and is an alkyl group, a cycloalkyl group, an aryl group, or an aralkyl group, X.sup.1 is a halogen atom, and n is a real number of from 1.0 to 2.0, with (ii) at least one halogen-containing compound selected from the group consisting of halogenated hydrocarbons, oxygen-containing halogenated hydrocarbons, halogenated thionyls, halogen-containing phosphorus compounds and halogen-containing nitrogen compounds, and (iii) an oxygen-containing titanium compound of the formula Ti(OR.sup.2).sub.4 wherein R.sup.2 contains from 1 to 10 carbon atoms and is an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, (iv) in the presence or in the absence of an organic acid ester to produce a solid reaction product. Said solid reaction product is, as it is or after a pre-treatment with an organic acid ester, reacted with a halogen-containing tetravalent titanium compound of the formula Ti(OR.sup.3).sub.m X.sup.2.sub.4-m wherein R.sup.3 contains from 1 to 10 carbon atoms and is an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, X.sup.2 is a halogen atom, and m is a real number of from 0 to 3.0, in the presence or in the absence of an organic acid ester, and always in the presence of an organic acid ester when an organic acid ester was not used in at least one of the preceding steps.
REFERENCES:
patent: 4069169 (1978-01-01), Toyoda et al.
patent: 4115319 (1978-09-01), Scata et al.
patent: 4328121 (1982-05-01), Capshew
patent: 4331790 (1982-05-01), Ligorati et al.
Asahi Satoshi
Mori Shigeo
Takeshita Yasuhiro
Idemitsu Kosan Company Limited
Smith Edward J.
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