C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/645
C08F 36/06 (2006.01) C08F 10/00 (2006.01) C08F 4/66 (1980.01)
Patent
CA 1175199
ABSTRACT OF THE DISCLOSURE A process for the stereospecific polymerization of .alpha.-olefins which comprises polymerizing an .alpha.-olefin with a catalyst comprising (A) the reaction produc-t of a mag- nesium compound and a titanium compound and (B) an organo- aluminum compound. Component (A) is prepaxed by reacting a (i) magnesium compound of the formula Mg(OR1)nX12-n wherein R1 contains from 1 to 10 carbon atoms and is an alkyl group, a cycloalkyl group, an aryl group, or an aralkyl group, X1 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 com- pound of the formula Ti(OR2)4 wherein R2 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(OR3)mX24-m wherein R3 contains from 1 to 10 carbon atoms and is an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, X2 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.
377931
Asahi Satoshi
Mori Shigeo
Takeshita Yasuhiro
Idemitsu Kosan Company Limited
Riches Mckenzie & Herbert Llp
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