Preparation of water-insoluble carboxymethyl cellulose absorbents
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United States of America Patent
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Apr 29, 1980
Grant Date -
N/A
app pub date -
May 17, 1978
filing date -
May 17, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the preparation of a substantially water-insoluble, particulate sodium salt of carboxymethyl cellulose, suitable for use as an absorbent in tampons and other catamenial devices or the like. The process involves heating solid, water-soluble sodium carboxymethyl cellulose, having a degree of substitution of at least 0.4, with carbon dioxide gas to substantially insolubilize the carboxymethyl cellulose and convert it to a form suitable for absorbent applications.
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