PREPARATION OF N,N-(DI)ALKYLAMINOALKYL(METH)ACRYLAMIDE OR N,N-(DI)ALKYLAMINOALKYL(METH)ACRYLATE AND THEIR QUATERNARY AMMONIUM SALTS AS FLOCCULATING AUXILIARY SUBSTANCES AND GEL-FORMING AGENTS Russian patent published in 2021 - IPC C07C213/06 C07C219/08 C07C231/02 C07C233/38 C08F220/60 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for the preparation of N,N-(di)alkylaminoalkyl(meth)acrylamide or N,N-(di)alkylaminoalkyl(meth)acrylate or their quaternary ammonium salts. The specified method includes interaction in a liquid phase of alkyl(meth)acrylate with amine or alcohol to obtain a product containing the specified N,N-(di)alkylaminoalkyl(meth)acrylamide or N,N-(di)alkylaminoalkyl(meth)acrylate or their quaternary ammonium salts, wherein the concentration of oxygen in the liquid phase is <1000 ppm, and the specified N,N-(di)alkylaminoalkyl(meth)acrylamide or N,N-(di)alkylaminoalkyl(meth)acrylate have the formula (I), in which R₀ is hydrogen or methyl, X is NH or O, R₂ is linear branched or cyclic alkylene radical containing 1-12 carbon atoms or aryl radical, which can also be substituted with at least one alkyl group, R₃, R₄ are linear branched or cyclic alkyl radical containing 1-12 carbon atoms or aryl radical, which can also be substituted with at least one alkyl group. The product has the content of less than 1200 ppm of a compound of the formula (IV), in which R₀ is hydrogen or methyl, X is NH or O, R₅ in each case is linear branched or cyclic alkylene radical, aryl radical, which can also be substituted with at least one alkyl group, linear, cyclic or branched alkyl radical containing 1-12 carbon atoms.

EFFECT: proposed method allows obtaining N,N-(di)alkylaminoalkyl(meth)acrylamides or N,N-(di)alkylaminoalkyl(meth)acrylates with low content of compounds of the formula (IV).

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