Hydrogel-forming polymer compositions for use in absorbent struc

Details Hydrogel-forming polymer compositions for use in absorbent struc Hydrogel-forming polymer compositions for use in absorbent struc

1987-06-10

1988-04-19

Yasko, John D.

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

521149, 526207, A61F 1316

Patent

active

RE0326496

ABSTRACT:
The present invention relates to improved hydrogel-forming polymer compositions which can be used as absorbents in absorbent structures and absorbent articles such as diapers, sanitary napkins and the like. Such hydrogel-forming polymer compositions are substantially water-insoluble, slightly cross-linked, partially neutralized polymers which are prepared from unsaturated polymerizable, acid group-containing monomers and cross-linking agents. These hydrogel-forming polymer materials, upon imbibing fluids, form hydrogels. Such polymer materials have relatively high gel volume and relatively high gel strength as measured by shear modulus of the hydrogen which forms therefrom. Such polymer materials also contain relatively low levels of extractable polymer material which can be extracted therefrom by contact with synthetic urine. Preferred hydrogel-forming polymers having these characteristics can be prepared by polymerizing the acid group-containing monomers in their free acid form at relatively low monomer concentrations, preferably using relatively low polymerization temperatures. Absorbent structures and absorbent articles containing these dried hydrogel-forming polymer materials are also disclosed.

REFERENCES:
patent: 3901236 (1975-08-01), Assarsson et al.
patent: 3926891 (1975-12-01), Gross et al.
patent: 3980663 (1976-09-01), Gross
patent: 4062817 (1977-12-01), Westerman
patent: 4076663 (1978-02-01), Masuda et al.
patent: 4124748 (1978-11-01), Fujimoto et al.
patent: 4190562 (1980-02-01), Westerman
patent: 4286082 (1981-08-01), Tsubakimoto et al.
patent: 4295987 (1981-10-01), Parks
patent: 4340706 (1982-07-01), Obayashi et al.
patent: 4351922 (1982-09-01), Yoshida et al.
patent: 4389513 (1983-06-01), Miyazaki
patent: 4401795 (1983-08-01), Herman et al.
patent: 4473689 (1984-09-01), Login et al.
patent: 4522997 (1985-06-01), Schmitz et al.
patent: 4525527 (1985-06-01), Takeda et al.
patent: 4535098 (1985-08-01), Evani et al.
patent: 4552938 (1985-11-01), Mikita et al.
patent: 4562114 (1985-12-01), Sawanishi et al.
patent: 4587308 (1986-05-01), Makita et al.
patent: 4625001 (1986-11-01), Tsubakimoto et al.
patent: 4645789 (1987-02-01), Dabi
patent: 4666975 (1987-05-01), Yamasaki et al.
patent: 4666983 (1987-05-01), Tsubakimoto et al.
Shimomura, "Hydrogel and Its Application", Chemistry of Water Seminar, Osaka University, May 20, 1984.
Arakawa Chemical Industries, Ltd.; "ARASORB A Super Absorbent Polymer"; undated.
Stockhausen Inc.; "FAVOR SAB-901"; Jul. 1983.
BASF AG; "LUQUASORB HC9780-Superabsorbent Based on Polyacrylic Acid for Aqueous Fluids"; undated.
Sanyo Chemical Industries; "Super Absorbent Polymer-SANWET IM-300/SANWET IM-1000" Oct. 1982.

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