Anionic cellulose nitrate derivatives and aqueous...

Details Anionic cellulose nitrate derivatives and aqueous... Anionic cellulose nitrate derivatives and aqueous...

2006-07-04

2006-07-04

Brunsman, David M. (Department: 1755)

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

Organic compounds

Carbohydrates or derivatives

C106S169010, C106S169460, C106S169560, C524S037000

Reexamination Certificate

active

07071326

ABSTRACT:
An anionic cellulose nitrate derivative is described, which has: (i) a degree of acid group substitution (DS (acid)) in the range of 0.01 to 0.2; and (ii) a nitrogen content of 10.7 wt. % to 12.3 wt. %, based on the weight of cellulose nitrate derivative. The anionic cellulose nitrate derivative is prepared by a process which includes esterifying cellulose nitrate feed material with at least one dicarboxylic acid anhydride (e.g., maleic anhydride). Aqueous dispersions according to the present invention include: (a) at least on anionic cellulose nitrate derivative according to the present invention; and (b) at least one base.

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