An improved catalyst for homo- and co-polymerization of olefin

Details An improved catalyst for homo- and co-polymerization of olefin An improved catalyst for homo- and co-polymerization of olefin

C - Chemistry, Metallurgy

08

F

C08F 4/654 (2006.01) C08F 10/00 (2006.01) C08F 110/06 (2006.01)

Patent

CA 2388704

The present invention relates to a solid complex titanium catalyst for homo- polymerization and co-polymerization of .alpha.-olefin, obtained by (i) producing a solution of a magnesium compound by dissolving a magnesium compound and a compound of IIIA Group of the Periodic Table in a solvent mixed with cyclic ether, one or more types of alcohol, a phosphorous compound, and an organosilane, (ii) precipitating the solid particles by reacting said magnesium solution with a compound of a transition metal, a silicon compound, or the mixture thereof, and (iii) reacting said precipitated solid particles with a titanium compound and an electron donor. The catalyst of the present invention is of large particle size, narrow particle distribution, and high catalytic activity, while the polymers obtained with the use of this catalyst are of excellent stereoregularity.

La présente invention porte sur un catalyseur de titane complexe, solide, pour l'homopolymérisation et la copolymérisation d'une oléfine alpha . Ce procédé consiste à (i) produire une solution de composés de magnésium en faisant dissoudre un composé de magnésium et un composé du Groupe IIIA du tableau périodique dans un solvant mélangé avec un éther cyclique, un ou plusieurs types d'alcool, un composé de phosphore et un organosilane; (ii) précipiter les particules solides en faisant réagir la solution de magnésium avec un composé d'un métal de transition, un composé de silicium ou le mélange de ceux-ci et (iii) faire réagir ces particules solides précipitées avec un composé de titane et un donneur d'électrons. Le catalyseur de la présente invention a une grande dimension de particule, une granulométrie étroite et une grande activité catalytique, alors que les polymères obtenus au moyen de ce catalyseur ont une excellente stéréorégularité.

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