Oxidized cellulose

Details Oxidized cellulose Oxidized cellulose

1993-08-03

1995-05-09

Nutter, Nathan M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 84, 536120, 536124, C08B 1100

Patent

active

054140790

ABSTRACT:
A method for making an oxidized cellulose product from a cellulose material is disclosed. The method involves oxidizing a cellulose material into an oxidized cellulose product, comprising treating the cellulose material with a hypochlorite solution having an active chlorine content of between about 4 and about 6%, at a pH exceeding 9.5 and at a temperature, and for a time, effective to convert the cellulose material into the oxidized cellulose product; filtering the oxidized cellulose product; and washing the oxidized cellulose product with an antichlor agent such as sodium thiosulfate to remove chlorine and to raise the oxidized cellulose product to a neutral pH.
The oxidized cellulose product may be used to form films, dispersions, gels, as carriers, for pharmaceuticals, cosmetics and other products.

REFERENCES:
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patent: 3627676 (1971-12-01), Eccles, Jr.
patent: 4056400 (1977-11-01), Diamantoglou et al.
patent: 4143034 (1979-03-01), Jefferies et al.
patent: 4359322 (1982-11-01), Neal et al.
patent: 4376729 (1983-03-01), Crounse
patent: 4473193 (1988-11-01), Pensa
patent: 4480089 (1984-10-01), Chen et al.
patent: 4675389 (1987-06-01), Cook et al.
Clibbens et al "The Chemical Analysis of Cotton, The Rate of Oxycellulose Formation" Journal of the Textile Institute, vol. XVIII, 1927, pp. TI35-TI67.

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