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AssigneeMitsubishi Chemical Corporation
InventorsKouji Katoh, Kiichi Itoh, Yoshiaki Mori
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This invention discloses a continuous production method of water-absorbing composite which comprises a complexation step for producing a particle-substrate composite by dropwisely supplying an aqueous solution of polymerizable monomers consisting mainly of an unsaturated carboxylic acid where 20% or more of the carboxyl groups in the unsaturated acid is neutralized, while allowing polymerization to proceed in the droplets, onto a fibrous substrate fed to the drop point to allow the incompletely polymerized polymer particles to adhere thereon, and by completing the polymerization thereafter; and a surface crosslinking step for reacting the composite with a crosslinking agent, having two or more functional groups capable of reacting with carboxyl group and/or carboxylate group, in the presence of 1 to 100 weight parts of water per 100 weight parts of polymer particles derived from the polymerizable monomer contained in the composite. Such continuous production method is successful in producing, in a continuous and efficient manner, a water-absorbing composite excellent in water absorption property and water retention property.
A continuous production method of water-absorbing composite comprising:
A water-absorbing composite comprising a water-absorbing polymer and a fibrous substrate satisfying at least one of conditions (1) to (3) such that:
A water-absorbing composite comprising a water-absorbing polymer and a fibrous substrate satisfying at least one of conditions (1) to (3) such that:
A water-absorbing composite comprising a water-absorbing polymer and a fibrous substrate satisfying at least one of conditions (1) to (3) such that:
Dependencies are inferred from the claim text.