Polymerization catalyst promoter

Details Polymerization catalyst promoter Polymerization catalyst promoter

C - Chemistry, Metallurgy

07

C

C07C 327/22 (2006.01) C07C 69/65 (2006.01) C08F 4/68 (2006.01) C08F 210/02 (2006.01) C08F 210/16 (2006.01) C08F 210/18 (2006.01)

Patent

CA 2253526

Compounds of the formula (I) wherein n is 1, 2, 3 or 4; X1 and X2 are each, independently, chlorine or bromine; A is O or S; R1 is hydrogen or C1-C16 alkyl; R2 is C1-C16 alkyl, C6-C16 aryl, C1-C4 alkylidene, or CH2OR5; R3 is hydrogen, chlorine, bromine, or OR6; R4 is C1-C16 alkyl, C7-C16 aralkyl, C2- C16 alkenyl, or C6-C18 aryl; R5 is hydrogen, C1-C16 alkyl, C7-C16 aralkyl, C2- C16 alkenyl, or C6-C18 aryl; and R6 is hydrogen or C1-C16 alkyl. These compounds by themselves and in combination with certain halo-but-2-enoic acids and esters are useful as catalyst promoters in ethylene polymerization processes.

On décrit des composés de la formule (I) dans laquelle n vaut 1, 2, 3 ou 4, X?1¿ et X?2¿ représentent chacun indépendamment chlore ou brome, A représente O ou S, R?1¿ représente hydrogène ou alkyle C¿1?-C¿16?, R?2¿ représente alkyle C¿1?-C¿16?, aryle C¿6?-C¿16?, alkylidène C¿1?-C¿4? ou CH¿2?OR?5¿, R?3¿ représente hydrogène, chlore, brome ou OR?6¿, R?4¿ représente alkyle C¿1?-C¿16?, aralkyle C¿7?-C¿16?, alcényle C¿2?-C¿16? ou aryle C¿6?-C¿18?, R?5¿ représente hydrogène, alkyle C¿1?-C¿16?, aralkyle C¿7?-C¿16?, alcényle C¿2?-C¿16? ou aryle C¿6?-C¿18?, et R?6¿ représente hydrogène ou alkyle C¿1?-C¿16?. Ces composés, seuls ou en combinaison avec certains acides et esters halo-but-2-énoïques sont utiles en tant que promoteurs de catalyseurs dans des processus de polymérisation d'éthylène.

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