Composition for use for producing fibres or films and on the basis of at least one cellulose derivative, a process for producing the composition, and a process for producing an article from the composition

摘要

PCT No. PCT/CH85/00065 Sec. 371 Date Dec. 19, 1985 Sec. 102(e) Date Dec. 19, 1985 PCT Filed Apr. 24, 1985 PCT Pub. No. WO85/05115 PCT Pub. Date Nov. 21, 1985.Composition (M) having a base of a cellulose ester having formate groups, this composition being an anisotropic solution containing: (a) the cellulose ester; (b) formic acid; (c) at least one phosphoric acid. A process for obtaining this composition by dissolving the cellulose and a process for obtaining articles by transformation of this composition, and, for example, regenerating the cellulose of these articles. A cellulose fiber is provided in which a degree of substitution of the cellulose by formate groups is either at least equal to 2% or is zero or less than 2%.