Process for stabilizing acrylonitrile polymer spinning solutions
AssigneeBayer Aktiengesellschaft
InventorsKarl-Heinz David, Alfred Nogaj, Heinrich Rinkler
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Abstract
The invention relates to a process for the stabilization of a spinning solution of an acrylonitrile polymer and a solvent which comprises adding from 0.005 to 0.5% based on the quantity of polymer of at least one stabilizer selected from a polyfunctional phosphonic acid, a phosphonocarboxylic acid or a polymer containing phosphonic acid and/or carboxyl groups to the spinning solution as well as to such stabilized spinning solutions.
Claims7
A process for the stabilization of a spinning solution of an acrylonitrile polymer and a solvent which comprises adding from 0.005 to 0.5 percent, based on the quantity of polymer, of at least one stabilizer selected from 2-phosphonobutane-1,2,4-tricarboxylic acid, 2,4-diphosphonobutane-1,2-dicarboxylic acid, polyacrylic acid or polymaleic acid to the spinning solution.
A spinning solution of an acrylonitrile polymer and a solvent which contains from 0.005 to 0.5 percent by weight, based on the quantity of acrylonitrile polymer, of at least one stabilizer selected from the group consisting of 2-phosphonobutane-1,2,4-tricarboxylic acid, 2,4-diphosphonobutane-1,2-dicarboxylic acid, polyacrylic acid and polymaleic acid.
Dependencies are inferred from the claim text.