Process for the preparation of cellulose acetate film

Details Process for the preparation of cellulose acetate film Process for the preparation of cellulose acetate film

1996-01-19

1998-01-06

Nutter, Nathan M.

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

Organic compounds

Carbohydrates or derivatives

536 76, C08J 311

Patent

active

057056323

ABSTRACT:
A process for the preparation of a cellulose acetate film comprises the steps of: cooling a mixture of cellulose acetate and an organic solvent to -100.degree. to -10.degree. C.; warming the cooled mixture to 0.degree. to 50.degree. C. to dissolve the cellulose acetate in the organic solvent; casting the obtained solution on a support; and evaporating the organic solvent to form the cellulose acetate film. The cellulose acetate has an average acetic acid content in the range of 58.0 to 62.5%. The organic solvent is acetone.

REFERENCES:
Database WPI, Section Ch, Week 8713, Derwent Publications Ltd., Feb. 18, 1987, Abstract of JP-A-62 037 113.
Die Makromolekulare Chemie, J.M.G. Cowie et al., The Dissolution and Stability of Cellulose . . . , vol. 143, No. 3516, 1971, pp. 105-114.
K. Kamide et al., Textile Machinery Society, Dry Spinning of Cellulose . . . vol. 34, pp. 57-61, 1981.

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