Process for preparing acrylonitrile polymer solution
Abstract
Abstract A METHOD OF FORMING SHAPED ARTICLES, SUCH AS FIBERS FILMS FIBRILLATED FILMS, MOLDED PRODUCTS AND THE LIKE, IS DESCRIBED UTILIZING A SOLUTION OF A ACRYLONITRILE POLYMER IN A LOW BOILING SOLVENT MAINTAINED UNDER SUPERATMOSPHERIC PRESSURES. THE PRODUCTS PRODUCED THEREBY ARE UNIQUE AND, WHEN THE FIBER FORM, THE FIBERS POSSES PARTICULARY DESIRABLE PROPERTIES. THE PROCESS IS DIRECTED TO THE EXTRUDING OF ACRYLONTRILE POLYMERS AT LEAST ABOUT 85 PERCENT ACRYLONITRILE USING ACETRONITRILE AS THE SOLVENT. THE PROCESS IS EFFECTED BY MAINTAINING THE FIBER-FORMING MATERIAL IN A LIQUID STATE SUPERATMOSPHERIC PRESSURE AND ELEVATED TEMPERATURES AND RELEASING THE PRESSURE AND/OR COOLING ON EXTRUDING THROUGH A SHAPED ORIFICE. THE PROCESS CONDITIONS ARE READILY VARIED SO THAT MELT SPUN, DRY SPUN OR WET SPUN TYPE RESULTS ARE OBTAINED.
Inventors
- 👤 Thomas C Bohrer
- 👤 Antony E Champ
Bibliographic Details
Claims Analysis
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