Polyalkyl piperidine derivatives useful as polymer stabilizers

Details Polyalkyl piperidine derivatives useful as polymer stabilizers Polyalkyl piperidine derivatives useful as polymer stabilizers

C - Chemistry, Metallurgy

07

D

260/249, 400/708

C07D 401/14 (2006.01) C08K 5/34 (2006.01)

Patent

CA 1204751

"PIPERIDINE DERIVATIVES AND USE THEREOF AS STABILIZERS FOR POLYMERS" ABSTRACT The invention relates to novel polyalkyl piperidine derivatives and use thereof as stabilizers for polymers. More particularly the invention relates to compounds having the general formula I Image where R denotes hydrogen, alkyl, cycloalkyl, alkenyl, aralkyl or aryl; R1 and R'1 denote hydrogen, alkyl, alkenyl or aralkyl; R2 and R'2 denote hydrogen or methyl; X and X' denote oxygen or NR3; - 2 - R3 denotes hydrogen, alkyl, cycloalkyl or aralkyl; A and A' denote (CH2)mX"; m equals 2 or 3; X" has the same meaning as X and X' and n can be 0 or 1. DESCRIPTION OF THE INVENTION The invention relates to novel polyalkyl piperidine derivatives and use thereof as stabilizing agents for polymers. As is known, synthetic polymers may deteriorate through the action of heat, light or oxygen, which cause degradation, embrittlement, discoloration and other undesirable effects. Various classes of chemical compounds havebeen proposed for stabilizing polymer materials, mainly against UV radiation from sunlight. Examples of such compounds are benzophenones, benzotriazoles, .alpha.-cyanoacrylates and polyalkyl piperidine derivatives. German Offenlegungsschrift 2 319 816 describes stabilizers in the form of polyalkyl piperidine derivatives having the following general formula: Image

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