Cellulose acetate propionate, solution thereof and cellulose ace

Details Cellulose acetate propionate, solution thereof and cellulose ace Cellulose acetate propionate, solution thereof and cellulose ace

1997-07-30

1999-01-05

Nutter, Nathan M.

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

Organic compounds

Carbohydrates or derivatives

536 65, C08B 316

Patent

active

058564683

ABSTRACT:
Cellulose acetate propionate is a cellulose ester wherein hydroxyl groups of cellulose are substituted with acetyl and propionyl. Cellulose acetate propionate of the present invention has an amorphous index (Am) of not more than 0.4. Cellulose acetate propionate has a degree of acetyl substitution (DSac) and a degree of propionyl substitution (DSpr), which preferably satisfy the formulas (I) to (III), and more preferably satisfy the formulas (I) to (IV). The present invention also provides a solution of cellulose acetate propionate and a cellulose acetate propionate film. (I) 2.0<DSac.ltoreq.2.95

REFERENCES:
patent: 5219510 (1993-06-01), Machell et al.
patent: 5288715 (1994-02-01), Machell et al.
C. J. Malm, et al (Eastman Kodak Co.)--"Aliphatic Acid Esters of Cellulose" --pp. 688-691--Industrial and Engineering Chemistry--vol. 43, No. 3 (1951).
A. Catalogue of Eastman--Cellulose Esters--Jun. 1994--Publication E-146L.

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