Patent ID: 7622535
Filing Date: 2009-11-24
Classification: C08F

Abstract:
1. A method for continuous production of a water-absorbent resin by use of a continuous polymerization device comprising a charge part of a monomer aqueous solution containing a monomer, a polymerization initiator and a crosslinking agent; an endless belt on which the monomer and a hydropolymer formed are conveyed; and a discharge part of the hydropolymer, wherein the monomer aqueous solution is fed to the endless belt at a temperature between 50° C. and 105° C.; the monomer is polymerized on the endless belt; and the continuous polymerization device has side walls and a ceiling, the space ratio in the device represented by the following equation 1 being in the range of 1.2 to 20: wherein A is a maximum cross-sectional area (cm