Cellulose ester composition

Details Cellulose ester composition Cellulose ester composition

1999-03-19

2000-10-31

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

10616272, 264217, 536 65, 536 68, 536 69, B29C 4124, C08L 110

Patent

active

061397857

ABSTRACT:
The present invention provides a cellulose ester composition, containing 1 to 99% by weight of cellulose triacetate prepared by substituting hydroxyl groups of cellulose with acetyl and having a degree of substitution with acetyl, DSace, which satisfies the relationship: 2.7.ltoreq.DSace.ltoreq.3.0, and 99 to 1% by weight of a mixed fatty acid ester of cellulose prepared by substituting hydroxyl groups of cellulose with acetyl and acyl groups having three or more carbon atoms and having degrees of substitution with acetyl and acyl groups having three or more carbon atoms, DSace and DSacyl, respectively, which satisfy the relationships: (I) 2.20.ltoreq.DSace.ltoreq.2.95, (II) 0.05.ltoreq.DSacyl.ltoreq.0.80 and (III) 2.60.ltoreq.DSace+DSacyl.ltoreq.3.00.

REFERENCES:
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patent: 5540874 (1996-07-01), Yamada et al.
patent: 5594068 (1997-01-01), Buchanan et al.
patent: 5686036 (1997-11-01), Arrington
patent: 5695694 (1997-12-01), Iwata et al.
Aliphatic Acid Esters of Cellulose Properties by C.J. Malm et al, Industrial and Engineering Chemistry, vol. 43, No. 3, pp. 688-691.

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