Hydrogel

Details Hydrogel Hydrogel

1993-11-02

1994-09-13

Reddick, Judy M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 17, 524 21, 524 24, 524 27, 524 29, 524503, 524557, 514944, 424486, 424487, 424488, C08L 100

Patent

active

053469356

ABSTRACT:
The hydrogel of the invention contains polyvinyl alcohol (a hydrogel support), and a high water-absorbent resin and/or a hydrophilic high molecular compound, which are capable of containing a large amount of water. The rate of evaporation of water from this hydrogel is slow. The hydrogel retains water for a long time and releases an active ingredient gradually. The hydrogel containing a pharmacologically active substance is useful as a pharmaceutical preparation.

REFERENCES:
patent: 4012352 (1977-03-01), Deyrup
patent: 4472542 (1984-09-01), Nambu
patent: 4582865 (1986-04-01), Balazs et al.
patent: 4657901 (1987-04-01), Ueda et al.
patent: 4663358 (1987-05-01), Hyon et al.
patent: 4689079 (1987-08-01), Buma et al.
patent: 4734097 (1988-03-01), Tanabe et al.
patent: 4774957 (1988-10-01), Nambu et al.
patent: 4916170 (1990-04-01), Nambu et al.
patent: 5141973 (1992-08-01), Kobayashi et al.

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