Process for preparation of water absorptive composite

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

1988-05-26

1989-06-27

Lusignan, Michael

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

4293899, 429391, 429392, 428264, 428265, 428290, 428511, 428514, B05D 302, B32B 700, D04B 100

Patent

active

048429279

ABSTRACT:
A process for preparing a water absorptive composite consisting of a highly water absorptive polymer and a prefabricated fibrous substrate, which comprises applying an aqueous solution containing (a) 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, (b) 2-vinylpyridine or(and) 4-vinylpyridine or(and) their salts, (c) a crosslinking agent and (d) an oxidative radical polymerization initiator to a prefabricated fibrous substrate, and then carrying out polymerization with addition of a reducing agent.

REFERENCES:
patent: 4455342 (1984-06-01), Fink et al.
patent: 4467012 (1984-08-01), Pederson et al.
patent: 4738867 (1988-04-01), Itoh et al.

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