Abstract: The present invention relates to a powdery absorbing material for aqueous liquids based on a water-swellable powdery polymer having at least 0.2 equivalents carboxyl groups per 100 parts by weight which are neutralized by 50 to 99, advantageously by at least 80 mole %. The powdery absorbing material is obtained by treating the water-swellable carboxyl-groups-containing polymer with a solution of an N-(hydroxyalkyl).beta.-(meth)-alanine ester or with the polycondensation products thereof. As a solvent for the powdery absorbing material, water is used which either contains water-miscible organic diluents which evaporate on heating, or non-evaporative water-miscible organic diluents, i.e., diluents remaining in the polymer.

Abstract: The present invention relates to a process for the production of N-substituted .alpha.,.beta.-unsaturated carboxylic acid amides, which proceeds from the .alpha.,.beta.-unsaturated carboxylic acid amide that is unsubstituted at the amido nitrogen, which forms the Michael adduct initially by conversion with a polyvalent alcohol having a boiling point of >/=150.degree. C., converts this with a primary or secondary amine with elimination of ammonia to form N-substituted carboxylic acid amide with a protected double bond, the polyvalent alcohol being subsequently eliminated from this product at high temperatures, with formation of the N-substituted .alpha.,.beta.-unsaturated carboxylic acid amide.

Abstract: This invention describes a process for the production of N-(tert-aminoalkyl)acrylamides by the reaction of acrylic acid with a suitable tertiary aminoalkylamine at a temperature of 150.degree.-230.degree. C. The aminoalkylamine and acrylic acid are reacted in equimolar quantities, preferably in the presence of an acidic or a basic catalyst.