Liquid crystal solutions having a base of cellulose and at least one phosphoric acid

摘要

PCT No. PCT/CH95/00206 Sec. 371 Date Mar. 18, 1997 Sec. 102(e) Date Mar. 18, 1997 PCT Filed Sep. 18, 1995 PCT Pub. No. WO96/09356 PCT Pub. Date Mar. 28, 1996Liquid-crystal solutions comprising cellulose dissolved in a solvent agent. They contain more than 10% by weight of cellulose, and are optically anisotropic at rest and at room temperature. The solvent agent contains more than 85% by weight of at least one phosphoric acid, this phosphoric acid or all of these phosphoric acids having the following average formula:[n(P2O5), p(H2O)],with 0.33<(n/p)<1.0. A method of obtaining such solutions. Production of fibers or films from these solutions. Assemblages of such fibers of films. Articles reinforced by such fibers or films or assemblages, said articles being in particular tire casings.