Process for preparation of alkali cellulose ester sulfates

Details Process for preparation of alkali cellulose ester sulfates Process for preparation of alkali cellulose ester sulfates

1975-02-20

1977-01-25

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

128290R, C08B 700

Patent

active

040052516

ABSTRACT:
A barrier film is provided for a product used in contact with body fluids. The barrier film comprises an alkali salt of a sulfated cellulose ester, with a degree of sulfate substitution satisfactory to render the film resistant to body fluids and yet dispersible in low salt concentration aqueous solutions such as those found in a household water closet. There is also disclosed a process for preparing alkali salts of sulfated cellulose esters comprising sulfating woodpulp, acylating the sulfated wood pulp, and precipitating the desired product in an aqueous precipitation medium maintained at a specified pH range.

REFERENCES:
patent: 2582009 (1952-01-01), Crane
patent: 2849330 (1958-08-01), Hoffman et al.
patent: 3335128 (1967-08-01), Hiatt et al.
patent: 3624069 (1971-11-01), Schweiger
patent: 3702843 (1972-11-01), Schweiger

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