METHOD OF OBTAINING CROSS-LINKED HYDROPHILIC POLYMER DEMONSTRATING PROPERTIES OF SUPERABSORBENT Russian patent published in 2012 - IPC C08F2/00 C08F2/10 C08F20/54 C08F120/54 C08F220/54 C08F220/06 C08F220/56 

FIELD: chemistry.

SUBSTANCE: method of obtaining cross-linked hydrophilic polymer, demonstrating properties of superabsorbent, includes radical polymerization of acryl monomer in water medium in presence of oxidation-reduction initiating system, as acryl monomer used is N,N-dimethylacrylamide or its mixture with hydrophilic uncharged and/or ionogenic acryl monomer, polymerisation is carried out in frozen water medium, for which purpose initial solution of reagents is frozen and kept at -5…-40°C for 4…24 h, after which frozen system is thawed out, target product is separated and dried by known methods.

EFFECT: simplification of composition of initial mixture of acryl comonomers, as special linking agent is not introduced into initial solution for obtaining cross-linked polymer, invention is characterised by higher level of process safety on the whole, it is characterised by essential universality with respect to possibilities of varying water-absorbing ability of target product.

2 cl, 1 tbl, 41 ex