To provide a water holding agent for a disposable body warmer in which the fall of the water capacity of gel is very little even if it is stored at a high temperature for a long period of time and moreover the gel, which is excellent in storage stability without varying the shape of the gel, is obtained.
In the water holding agent for the disposable body warmer which comprises an absorptive resin (X) which consists of a crosslinked polymer (A) comprising a water-soluble vinyl monomer (a1) and/or a hydrolyzable vinyl monomer (a2) which becomes water-soluble by hydrolysis, and an internal crosslinking agent (b) as indispensable constituent units, and respective values of the content of an unreacted vinyl monomer in (X) and the viscosity retention of the water absorption gel of the water holding agent satisfy specific ranges.
MATSUMOTO YOSHIMASA
JP2001213914A | 2001-08-07 | |||
JP2001220415A | 2001-08-14 | |||
JP2000026510A | 2000-01-25 | |||
JPS6462317A | 1989-03-08 | |||
JPH08157737A | 1996-06-18 |