Process for producing water-absorbing polymer having...

Details Process for producing water-absorbing polymer having... Process for producing water-absorbing polymer having...

C - Chemistry, Metallurgy

08

G

C08G 65/14 (2006.01) B01J 20/26 (2006.01) B01J 20/32 (2006.01) C08F 8/00 (2006.01) C08J 3/12 (2006.01) C08L 71/02 (2006.01)

Patent

CA 2502789

A water-absorbing polymer having a desirably controlled moisture content with a reduced variability from lot to lot and suitable for a shaped article having good characteristics is obtained by bringing a finely divided particle of water-absorbing polymer into contact with a stream of air having a moisture content of 2-20 g/m3 so that the moisture content in the polymer particle is increased by 300 ppm by weight or more to a moisture content of 300-50,000 ppm by weight. This moisture content-controlling treatment is carried out using a closed vessel wherein the air is fed, or using a pneumatic transportation apparatus wherein the air is fed, and the transportation and moisture content-control of polymer particle are conducted simultaneously.

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