N,N-dimethylaminoethyl acrylate composition stabilized in respect of discoloring effects
AssigneeArkema France
InventorsFanny Dubut, Benoit Riflade, Sandra Maget
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Abstract
The invention relates to the use of 2,6,-di-tert-butyl-4-methylphenol at a moiety of 25 to 200 ppm for stabilizing N,N-dimethylaminoethyl acrylate in respect of discoloring effects. The invention also relates to an N,N-dimethylaminoethyl acrylate stabilized in said manner and to a method for producing the same.
Claims5
A process for the continuous production of a composition of N,N-dimethylaminoethyl acrylate that is stabilized with respect to coloration, comprising from 25 to 200 ppm of 2,6-di-tert-butyl-4-methylphenol, said process comprising the steps of transesterifying a light acrylate selected from the group consisting of methyl acrylate and ethyl acrylate, with dimethylaminoethanol in the presence of a catalyst, followed by a treatment for purifying a reaction mixture comprising a final distillation of purified N,N-dimethylaminoethyl acrylate, wherein 25 to 200 ppm of 2,6-di-tert-butyl-4-methylphenol are introduced at an outlet of the distilled gaseous stream of purified N,N-dimethylaminoethyl acrylate, before condensation of final product.
Dependencies are inferred from the claim text.