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Patent Searching and Data


Title:
METHOD FOR PRODUCTION OF ABSORBING RESIN
Document Type and Number:
Japanese Patent JP2012007151
Kind Code:
A
Abstract:

To provide a method for production of absorbing resin efficiently reducing residual monomers in a short time without reducing performance of the absorbing resin.

The invention relates to the method for producing absorbing resin including a crosslinked polymer (A) comprising (a1) a water soluble vinyl monomer and/or (a2) a hydrolyzable vinyl monomer, and (b) a crosslinking agent as indispensable constituent units, wherein the method is characterized by including a freeze-drying process for freeze-drying a water-containing gel (B) of the crosslinked polymer (A) at -50°C to -10°C, and then washing the dried product (C) with alcohol.


Inventors:
KANAYA IKUMI
Application Number:
JP2011112164A
Publication Date:
January 12, 2012
Filing Date:
May 19, 2011
Export Citation:
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Assignee:
SANYO CHEMICAL IND LTD
International Classes:
C08F6/00; A61F13/15; A61F13/53; C08F2/44; C08F20/00; C08F251/00; C09K3/00
Attorney, Agent or Firm:
Hirofumi Hayashi