Process for preparation of water absorptive composite material

Details Process for preparation of water absorptive composite material Process for preparation of water absorptive composite material

B - Operations, Transporting

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B05D 3/06 (2006.01) A61L 15/22 (2006.01) A61L 15/60 (2006.01) C08F 2/44 (2006.01) C08F 6/00 (2006.01) C08F 20/06 (2006.01)

Patent

CA 1305098

ABSTRACT There is provided a process for preparing a water absorptive composite material, which comprises the combination of the following steps of: (A) applying an aqueous solution of a polymerizable monomer comprising as a main component acrylic acid, of which 20%. or more of the carboxyl groups have been neutralized to its alkali metal salt or ammonium salt, to a prefabricated fibrous substrate; (B) polymerizing the polymerizable monomers applied to said fibrous substrate to form a composite of a polymer derived from said polymerizable monomer and said fibrous substrate; and (C) irradiating ultraviolet rays onto said composite with its water content being 0.01 to 40 parts by weight per 1 part by weight of said polymer to obtain a water absorptive composite having a lower content of unpolymerized monomers than said composite.

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