Catalytic Mannich reaction of acrylic acid polymers and their application in leather retanning

Abstract

The participation of acrylic acid, acrylamide and methyl acrylate in the Mannich reaction by means of the catalyst NaH was studied in this work. The optimal reaction conditions for the homopolymers were obtained via orthogonal experiments.

Insights into the Development of Dyeing-Assisting Amphoteric Acrylic Retanning/Fatliquoring Agents for Ecological Chrome-Free Tanned Leather Production

“…11 More recently, amphoteric acrylic polymers with dual functions of retanning and fatliquoring have been reported for chrome-free tanning systems to reduce the processing time and save leather chemicals. 12 In the methods of Ma et al 13,14 and Liu et al, 15 cationic monomers are synthesized through the Mannich reaction or quaternization reaction and then copolymerized with acrylic monomers via free radical polymerization to prepare the amphoteric polymer. Unfortunately, the approach requires a two-step reaction in an Herein, we propose a novel and feasible approach to synthesize amphoteric acrylic polymer (abbreviated as PAMLD) by free radical polymerization using acrylic acid (AA), methacrylic acid (MAA), dodecyl 2-methyl acrylate (LMA), and ethyl methacrylate trimethylammonium chloride (DMC).…”