Preparation of water-insoluble carboxymethyl cellulose...

Details Preparation of water-insoluble carboxymethyl cellulose... Preparation of water-insoluble carboxymethyl cellulose...

C - Chemistry, Metallurgy

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B

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C08B 11/20 (2006.01) A61L 15/28 (2006.01) C08B 15/00 (2006.01)

Patent

CA 1107268

PREPARATION OF WATER-INSOLUBLE CARBOXYMETHYL CELLULOSE ABSORBENTS ABSTRACT OF THE DISCLOSURE A process for the preparation of substantially water-insoluble, particulate sodium carboxymethyl cellulose, suitable for use as an absorbent in tampons and other catamenial devices, or the like. The process involves treating solid, water-soluble sodium carboxymethyl cellulose having a degree of substitution of at least 0.4 with hydrogen chloride gas and heating the carboxymethyl cellulose, either after the hydrogen chloride treatment or concurrently therewith, to produce a cross-linked, insoluble, partially acid form carboxymethyl cellulose suitable for absorbent applications.

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