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

1987-08-24

1989-09-12

Dixon, Jr., William R.

Coating processes

With post-treatment of coating or coating material

Chemical agent applied to treat coating

4273899, 427391, 427392, 81161, 81156, 81157, 502402, 525301, 525445, 527314, B05D 304, B05D 310

Patent

active

048658863

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) adding to said composite a crosslinking agent having two or more functional groups reactive with the carboxyl groups and/or carboxylate groups contained in the polymer to react therewith.

REFERENCES:
patent: 3056695 (1962-10-01), von Brachel
patent: 3995998 (1976-12-01), Rowland et al.
patent: 4008353 (1977-02-01), Gross et al.
patent: 4072784 (1978-02-01), Cirino et al.
patent: 4304564 (1981-12-01), Frick, Jr. et al.
patent: 4541871 (1985-09-01), Obayashi et al.
patent: 4647617 (1987-03-01), Saotome
patent: 4721647 (1988-01-01), Nakanishi et al.

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