A super water-absorbent resin was synthesized from the sodium salt of acrylic acid with acrylamide as comonomer

N

N ′-methylenebisacrylamide as crosslinking agent

K2S2O8 as initator

by means of aqueous solution polymerization.The effects of AM content

total monomer concentration

initiator concentration

crosslinker content

bath temperature on the characteristics of products as well as the reaction kinetics and the swelling kinetics of products were investigated.Under the following polymerization conditions: monomer concentration 40%

AM∶(AM+AA)=0.3-0.4

initiator concentration 0.3%-0.4%

bath temperature 110-130 ℃

crosslinker content 0.02%

the super water-absorbent resin of binary copolymer thus obtained had a higher water-absorbency (500-600) and salt solution(0.9% NaCl) absorbency (100-120).In addition

the water absorbent rate of this super water-absorbent resin of binary copolymer was higher than that of the reported superabsorbents.