The method of obtaining polyacrylamide hydrogels through continuous frontal polymerization

Abstract

The invention relates to the field of polymer chemistry and concerns the industrial technology of obtaining superabsorbents, in particular polyacrylamide hydrogel (PAH), which can be used in agriculture, medicine, cosmetology, for cleaning oil pipelines and for creating hygiene items. The technical result achieved in the implementation of the claimed invention consists in reducing the labor intensity in the implementation of the technology of obtaining polyacrylamide hydrogel, in increasing the reliability of the hydrogel production process by achieving stability of the polymerization process, as well as in improving the quality of the resulting polyacrylamide hydrogel by significantly improving the homogeneity of the hydrogel, in the possibility of stable and accurate production of pores of the specified size and density, as well as the elimination of toxicity of the finished product. The method of producing polyacrylamide hydrogels by continuous frontal polymerization, including feeding acrylamide or its derivatives into a vertical continuous reactor from bottom to top and polymerization using the process of frontal polymerization with continuous forced withdrawal of the resulting polyacrylamide hydrogel by drawing from the top of the reactor, wherein the acrylamide or its derivatives are fed into the reactor at atmospheric pressure.

Dependencies are inferred from the claim text.