Process for the production of absorbing material with an improve

Details Process for the production of absorbing material with an improve Process for the production of absorbing material with an improve

1994-11-21

1998-03-31

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Matrices

424484, 424489, 424486, A61K 914

Patent

active

057335761

ABSTRACT:
A process for the production of absorbing agents for water, aqueous solutions and body liquids consisting of at least two components A and B, whereby component A comprises a water-swellable, synthetic polymer or copolymer and component B comprises a natural or synthetic polymeric compound which at normal temperature is a pourable powder and is partially soluble or insoluble in water. Component B is added to component A in dry or partially swollen form during component A's production process after a monomer conversion of at least 30%, preferably at least 60% is attained, and is then mixed with the polymer gel of component A and subsequently dried. The invention further relates to the use of the absorbing agent for the absorption and/or retention of water and/or aqueous solutions, in particular of aqueous body liquids, such as urine or blood, in absorbent expendable products for hygienic, surgical and other medical purposes, such as diapers, tampons, and sanitary napkins; for the absorption and/or retention of water and/or aqueous solutions and subsequent controlled release of water and/or the substances dissolved in the aqueous medium to other bodies, as well as for drying gases and/or liquids, preferably organic liquids and solvents which are not miscible in water.

REFERENCES:
patent: 4429001 (1984-01-01), Kolpin et al.
patent: 4500670 (1985-02-01), McKinley et al.
patent: 4605401 (1986-08-01), Chmelir et al.
patent: 4892754 (1990-01-01), Itoh et al.
patent: 5006339 (1991-04-01), Bargevy et al.
patent: 5013769 (1991-05-01), Murray et al.
patent: 5041292 (1991-08-01), Feijen

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