Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1995-05-23
1996-09-17
Mullis, Jeffrey
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
42840224, 536 3, 525 543, B32B 100
Patent
active
055567037
ABSTRACT:
Described is a method for preparing a water-swellable, substantially water-insoluble material. The method involves forming a first solution containing a water-soluble phycocolloid. The first solution is then added to a second solution containing an ion capable of rendering the water-soluble phycocolloid substantially water insoluble. The phycocolloid material is then removed from the second solution and subjected to a solvent exchange to remove water present in the phycocolloid material. Hollow particles can be formed by including a gelation-retarding agent in the first solution. Also described is a water-swellable, substantially water-insoluble particle defining an interior void. The particle comprises an outer shell formed from a water-insoluble phycocolloid. The outer shell defines an interior void which contains a phycocolloid.
REFERENCES:
patent: Re32649 (1988-04-01), Brandt et al.
patent: 4446261 (1984-05-01), Yamasaki et al.
patent: 4824916 (1989-04-01), Kershner et al.
Kimberly-Clark Corporation
Mielke Thomas J.
Mullis Jeffrey
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