Block oligomers containing...

C - Chemistry – Metallurgy – 07 – D

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C07D 401/14 (2006.01) C08K 5/3492 (2006.01) C09K 15/20 (2006.01) C09K 15/30 (2006.01)

Patent

CA 2288322

Compounds of formula (I), wherein n is a number from 2 to 14; R1 is for example C1-C18alkyl or C5-C12cycloalkyl; R2 is for example C2-C12alkylene; A is for example acetyl, (C1-C4alkoxy)carbonyl, (C1- C4alkyl)aminocarbonyl or C1-C4alkyl; B is -OR3, -N(R4)(R5) or a group of formula (II); R3, R4 and R5, which are identical or different, are for example hydrogen or C1-C18alkyl, or -N(R4)(R5) is additionally a group of formula (III) with Y being -O-, -CH2-, -CH2CH2- or >N- CH3; X is -O- or >N-R6; R6 is for example hydrogen or C1-C18alkyl; and R is preferably a group of formula (IV); with the proviso that in the individual recurrent units of formula (I), each of the radicals B, R, R1 and R2 has the same or a different meaning. The indicated compounds are useful as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers.

L'invention concerne les composés selon la formule (I), dans laquelle n est un nombre compris entre 2 et 14. R1 est, par exemple, alkyle C1-C18 ou cycloalkyle C5-C12. R2 est, par exemple, alkylène C2-C12. A représente, par exemple, acétyl, (alcoxyC1-C4)carbonyl, (alkyleC1-C4)aminocarbonyl ou alkyle C1-C4. B est -OR3, -N(R4)(R5) ou un groupe de la formule (II) R3, R4, et R5 qui sont identiques ou différents sont, par exemple, de l'hydrogène ou alkyle C1-C18 ou -N(R4)(R5) est, en outre, un groupe présentant la formule (III) où Y représente -O-, -CH2-, -CH2CH2- ou >N-CH3. X est -O- ou >N-R6. R6 est, par exemple, de l'hydrogène ou alkyle C1-C18 et R est, de préférence, un groupe selon la formule (IV), à condition que dans les unités récurrentes de la formule (I), chacun des radicaux B, R, R1 et R2 présente la même signification ou une signification différente. Les composés indiqués sont utiles comme agents stabilisants à la lumière, stabilisants à la chaleur et stabilisants à l'oxydation pour les matériaux organiques, en particulier, les polymères de synthèse.

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