WATER-ABSORPTIVE FINE PARTICLE, POROUS FILM, POROUS FILM-COVERED WIRE, METHOD FOR PRODUCING WATER-ABSORPTIVE FINE PARTICLE, METHOD FOR PRODUCING POROUS FILM, AND METHOD FOR PRODUCING POROUS FILM-COVERED WIRE

摘要

PROBLEM TO BE SOLVED: To provide water-absorptive fine particles having a uniform and small particle diameter in a water-absorbing and swollen state, and a large swelling ratio.

SOLUTION: The water-absorptive fine particles absorbing water beforehand and being in the water-absorbing and swollen state are polymerized from a composition that contains an unsaturated organic acid, an unsaturated organic acid salt, an unsaturated amide, a crosslinking agent and a polymerization initiator, and contains water in a weight more than ten times the composition weight at polymerization.

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