Title:
PRODUCTION OF WATER-ABSORBING RESIN
Document Type and Number:
Japanese Patent JP3547517
Kind Code:
B2
Abstract:
PURPOSE: To obtain a water-absorbing resin which is excellent in stability since it has a very low water-sol. content through its water-absorbing capacity is high by subjecting a water-sol. monomer to free-radical polymn. in the presence of water, a cross-linker, and a specific compd.
CONSTITUTION: A water-sol. monomer (e.g. acrylic acid), if necessary together with a polysaccharide (e.g. starch), is subjected to free-radical polymn. in the presence of water, a cross-linker (e.g. methylenebisacrylamide, and a thiol compd. selected from among the compds. represented by the formulas HS-(CH2 CH2X1)n-(CH2CH2X2)m-H (wherein X1 is X2 are each O or S; (n) is a positive number; and (m) is 0 or a positive number), [HS-(CH2)PCOO]q-R (wherein (p) and (q) are each (n); and R is an aliph. mono- or polyol residue), and HS-(CHX3)r-(CHX4)sCOOH (wherein X3 is H or COOH; X4 is H or SH; (r) is (m); and (s) is (n)), thus giving a water-absorbing resin.
Inventors:
Takashi Tanaka
Masashi Date
Tomoyuki Tamabuchi
Takeshi Yuki
Kenjiro Tsubota
Masashi Date
Tomoyuki Tamabuchi
Takeshi Yuki
Kenjiro Tsubota
Application Number:
JP8465095A
Publication Date:
July 28, 2004
Filing Date:
March 15, 1995
Export Citation:
Assignee:
SANYO CHEMICAL INDUSTRIES,LTD.
International Classes:
A61F13/49; A61L15/60; B01J20/26; C08F2/10; C08F2/38; A61F13/53; C08F2/44; C08F20/04; C08F220/04; C08F251/00; (IPC1-7): C08F2/38; A61F13/49; A61F13/53; B01J20/26; C08F2/44
Domestic Patent References:
| JP5170848A | ||||
| JP3179008A | ||||
| JP2255804A |
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