Immobilizing particulate absorbents by conversion to hydrates

Details Immobilizing particulate absorbents by conversion to hydrates Immobilizing particulate absorbents by conversion to hydrates

1987-09-21

1989-05-02

Kight, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 55, 4273855, 427212, 4272133, 42721331, 42721333, 427222, 428481, 428482, 428483, 428500, 428507, 428509, 428515, 428516, 428532, 428533, 525 63, C08J 936

Patent

active

048268801

ABSTRACT:
The invention relates to absorbent compositions, to methods for handling and immobilizing particulate absorbents, and to absorbent articles produced from the absorbent compositions. Absorbent materials such as cross-linked, water-insoluble and water-swellable particulate polymers are immobilized and safely handled by adding thereto an aqueous liquid such as water or saline in amounts sufficient to form hydrates in which the water comprises from 20% to 80% by weight of the total hydrate. The hydrates may be extruded, sprinkled, or sprayed and can be incorporated into absorbent articles such as diapers and tampons by conventional means. The hydrates unexpectedly increase the total water absorbency of the absorbent on a dry basis.

REFERENCES:
patent: 4090013 (1978-05-01), Ganslaw et al.
patent: 4190563 (1980-02-01), Bosley et al.
patent: 4354901 (1982-10-01), Kopolow
patent: 4410571 (1983-10-01), Korpman
patent: 4444830 (1984-04-01), Erickson
patent: 4524186 (1985-06-01), Nagase
patent: 4605401 (1986-08-01), Chmelir et al.

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