C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/611, 402/644
C08F 2/02 (2006.01) C08F 10/00 (2006.01) C08F 10/04 (2006.01) C08F 10/14 (2006.01)
Patent
CA 1169998
ABSTRACT OF THE DISCLOSURE Poly-.alpha.-olefin, for example, polypropylene, is produced by subjecting a feed containing an u-olefin having 3 or more carbon atoms, to a preliminary polymerization at 40°C or less in the presence of a catalyst which comprises (A) a solid catalytic ingredient prepared (a) by reacting a Grignard compound of the formula, R3MgX wherein R3 = C1-8 alkyl and X = halogen, with a reaction product of an aluminium halide with an organic silicon compound of the formula, R?Si(OR2)4-n, wherein R1 = C1-8 alkyl or phenyl, R2 = C1-8 alkyl, n = 0, or 1 to 3, (b) bringing the resul- tant solid carrier into a first contact with titanium tetrahalide, (c) treating the resultant titanium-containing solid product with an organic acid ester, and, finally; (d) bringing the treated solid product into a second contact with titanium tetrahalide; (B) another catalytic ingredient consisting of a trialkyl aluminium of the formula, A?R? whereiD R4 = C2-6 alkyl; and a further catalytic ingredient consisting of an organic acid ester, and then, by subject- ing a polymerization mixture containing the above-mentioned catalyst, the preliminary polymer and free .alpha.-olefin to a final polymerization at a temperature above 40°C.
398042
Ikai Shigeru
Inoue Tokuji
Kai Yoshiyuki
Shimizu Michimasa
Ueno Haruo
Mcfadden Fincham
Ube Industries Ltd.
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