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US 3,980,663 AGranted
Absorbent articles and methods for their preparation from crosslinkable solutions of synthetic carboxylic polyelectrolytes
AssigneeThe Dow Chemical Company
InventorJames R. Gross
Life of this patent
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Abstract
Water swellable absorbent articles, made from carboxylic polyelectrolytes, together with methods for their preparation, and a composition useful to make said articles are disclosed. The articles are crosslinked by heating and/or removing substantially all of the water from the precursor composition. The absorbent articles are useful as surgical sponges, diapers, tampons, meat trays, bath mats and the like.
Claims11
A composition useful to form water swellable absorbent articles which comprises
- 1. a solution of a carboxylic synthetic polyelectrolyte wherein the solution comprises water, lower alcohols, or mixtures thereof and about 5 to about 60% by weight of a carboxylic polyelectrolyte containing sufficient carboxylate functionality to impart water-solubility to the salt form, and
- 2. at least about 0.1% by weight based on the polyelectrolyte of a difunctional crosslinking agent reactive with carboxylate groups through nucleophilic displacement.
Dependencies are inferred from the claim text.