摘要:
A precatalyst for the polymerization of α-olefins, having the formula FeuMalc vXw(LA)y(LB)z wherein: - Malc is an alkali metal and/or an alkaline-earth metal. - X is an anion; - LA is a Lewis acid; - LB is a Lewis base; - u is between 0.001 and 10; - v is an integer > 1; - w is between 1 and 20; - y is between 0 and 10; z is between 0 and 10.
摘要:
The present invention relates to a compound of formula (II) and its use in the preparation of a functional or telechelic polyolefin: Y((CH 2 ) P -B') m (II) m = 2 or 3; Y being and alkaline earth or zinc when m = 2, Y being aluminium when m = 3; B' being selected from the group comprising N(SiMe 3 ) 2 ; N(SiMe 2 CH 2 CH 2 SiMe 2 ); C 6 F 5 ; C 3 F 7 ; C 6 F 13 ; para-C 6 H 4 -NMe 2 ; para-C 6 H 4 -0-Me; para-C 6 H 4 -N(SiMe 3 ) 2 ; and CH(OCH 2 CH 2 0); p being an integer between 0 and 50.
摘要:
The present invention relates to a telechelic polyolefin of formula (III) or (IV) and the process for preparing same, Z-A-(CH 2 ) P -B' (III) Z-A-(CH 2 ) P -B (IV) - A being a polymer chain obtained by homopolymerization of ethylene or by copolymerization of ethylene and an alpha-mono-olefin; - B' being selected from the group comprising N(SiMe 3 ) 2 ; N(SiMe 2 CH 2 CH 2 SiMe 2 ); para-C 6 H 4 (NMe 2 ); para-C 6 H 4 (OMe); C 6 H 4 (N(SiMe 3 ) 2 ); ortho-CH 2 -C 6 H 4 NMe 2 ; ortho-CH 2 -C 6 H 4 OMe; C 6 F 5 ; C 3 F 7 ; C 6 F 13 ; CH(OCH 2 CH 2 O); - B being the function B' or a function deriving from B'; - p being an integer from 0 to 50, advantageously from 0 to 11; Z being a function selected from the group consisting of halogens; thiols; derivatives of thiols; azide; amines; alcohols; a carboxylic acid function; isocyanates; silanes; phosphorus derivatives; dithioesters; dithiocarbamates; dithiocarbonates; trithiocarbonates; alkoxyamines; a vinyl function; dienes; and the group -A-(CH 2 ) P -B'.