Method for continuous production of water-absorbent resin

Details Method for continuous production of water-absorbent resin Method for continuous production of water-absorbent resin

2005-03-24

2009-11-24

Cheung, William K (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in two or more physically distinct zones

C526S303100, C526S317100

Reexamination Certificate

active

07622535

ABSTRACT:
The present invention relates to a method for continuous production of a water-absorbent resin by use of an continuous polymerization device having a charge part of a monomer aqueous solution; an endless belt on which the monomer and a hydropolymer formed are conveyed; and a discharge part of the hydropolymer, wherein the continuous polymerization device has side walls and a ceiling, and the space ratio in the device represented by the equation, “space ratio in the device=B/A”, is in the range of 1.2 to 20. In the equation, A is a maximum cross-sectional area (cm2) of the hydropolymer during the polymerization in the width direction of the endless belt, and B is a maximum cross-sectional area (cm2) of the space between the endless belt of the continuous polymerization device and the ceiling of the continuous polymerization device in the width direction of the endless belt.

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