Process for the preparation of novel light stabilisers

Details Process for the preparation of novel light stabilisers Process for the preparation of novel light stabilisers

C - Chemistry, Metallurgy

07

D

260/278.1, 260/2

C07D 211/46 (2006.01) C07D 401/12 (2006.01) C08K 5/3435 (2006.01)

Patent

CA 1180715

Abstract Mixtures of esters of polyalkylpiperidine deriva- tives, of the formulae I and II Image (I) (II) in which the proportions of I to II are 95 to 70% by weight and 5 to 30% by weight, are obtained by reacting about 2 mols of a piperidine of the formula III Image (III) with 0.9 to 1.3 mols of a diester of the formula IV Image (IV) in the melt at between 100 and 145°C, in the presence of an alkali metal amide as a catalyst. The mixtures of esters thus obtained are very suitable as light stabilisers for plastics. For the definition of the substituents R1, R2, R3 and R4, reference is made to claim 1,

415098

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