Hydroxyalkyl cellulose ethers

Details Hydroxyalkyl cellulose ethers Hydroxyalkyl cellulose ethers

1976-12-16

1978-06-27

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

106170, 536 66, 536 67, 536 91, 536 95, 536 96, C08B 1108, C08B 1120

Patent

active

040976670

ABSTRACT:
Disclosed is a process for the chemical modification of a water-soluble cellulose ether, which comprises reacting the ether with a chloroformic acid ester in an aqueous organic medium containing alkali hydroxide, whereby the cellulose ether is rendered at least partially insoluble in water. The modified cellulose ether may be easily dispersed in water and redissolved to form a smooth solution of the original water-soluble ether by adding sufficient alkali to the dispersion to reuse its pH to at least about 11, preferably to about 12.

REFERENCES:
patent: 2330263 (1943-09-01), Broderick
patent: 2602789 (1952-07-01), Schwartz et al.
patent: 3072635 (1963-01-01), Menkart et al.
patent: 3287353 (1966-11-01), Stidham
patent: 3527751 (1970-09-01), Gill
patent: 3705890 (1972-12-01), Barker et al.

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