Stabiliser mixture, especially for the production of alkoxypolyoxyalkylene (meth)acrylate, comprises a hydroquinone mono-ether, a phenolic antioxidant and a 2,2,6,6-tetra-substituted hydroxypiperidine derivative

摘要

Stabiliser mixtures comprising a hydroquinone mono-ether, a phenolic antioxidant and a 2,2,6,6-tetra-substituted 1,4-dihydroxypiperidine derivative. Stabiliser mixtures (SM) comprising (i) compound(s) of formula (I), (ii) compound(s) of formula (II) or (IV) and (iii) compound(s) of formula (V). R 1H, linear or branched alkyl, optionally substituted cycloalkyl, optionally substituted aryl or halogen; R 2as for R 1, but not H or halogen; R 3-R 5as for R 1, or a group of formula uOCOR 6; R 61-6C alkyl; R 7H or alkyl; R 8alkyl or alkylene; R 9alkyl or optionally substituted cycloalkyl. An independent claim is included for a method for the production of alkoxy-polyoxyalkylene (meth)acrylates by (a) adding alkylene oxides of formula (VI) to metal alcoholates of formula MetOR 10, (b) reacting the mixture and (c) adding (meth)acrylic anhydride (MAA) directly to the reaction mixture thus obtained. Met : lithium, sodium, potassium, rubidium or caesium; R 10alkyl; R 11H or alkyl. [Image] [Image] [Image] .