Vinyl-containing stereospecific polypropylene macromers

C - Chemistry – Metallurgy – 08 – F

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C08F 10/06 (2006.01) C08F 4/645 (2006.01) C08F 110/06 (2006.01) C08F 4/659 (2006.01)

Patent

CA 2304288

Stereospecific polypropylene macromers having a high percentage of vinyl terminal bonds and a method for preparing them are provided. The stereospecific polypropylene macromers have number average molecular weights (Mn) of about 2,000 Daltons to about 50,000 Daltons, and the total number of vinyl groups per 1000 carbon atoms is greater than or equal to 7000 Mn. The method for preparing the macromers involves: a) contacting, in solution, at a temperature from about 90 ~C to about 120 ~C, two or more propylene monomers with a catalyst composition comprising a chiral, stereorigid transition metal catalyst compound; and b) recovering stereospecific polypropylene chains having number average molecular weights of about 2,000 Daltons to about 50,000 Daltons and significant vinyl unsaturation.

Macromères de propylène stéréospécifiques ayant un pourcentage élevé de liaisons terminales vinyle et procédé de préparation desdits macromères. Ils possèdent un poids moléculaire moyen en nombre (M¿n?) d'environ 2.000 daltons à environ 50.000 daltons, et le nombre total de groupes vinyle par millier d'atomes de carbone est supérieur ou égal à 7.000 ? M¿n?. Le procédé de préparation desdits macromères consiste (a) à mettre en contact, en solution, à une température d'environ 90 ·C à environ 120 ·C, deux ou plusieurs monomères de propylène avec une composition de catalyse comportant un composé catalyseur chiral stéréorigide à base de métal de transition et (b) à récupérer les chaînes de propylène stéréospécifiques ayant un poids moléculaire moyen en nombre d'environ 2.000 daltons à environ 50.000 daltons et une insaturation vinyle considérable.

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