Stabilization of acrylonitrile polymers

• Main Authors: LOGEMANN HEINO, ROOS ERNST
• Format: Patent
• Language: English
• Published: 27.10.1964
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

Shaped articles are prepared from acrylonitrile polymers containing at least 60% acrylonitrile by adding an acid hydrazide of an aliphatic dicarboxylic acid (the carbon atom chain of which may contain hereto atoms), to an organic solvent for the polymer, before during or after dissolving the polymer, and then forming the solution into shaped articles. Preferably from 0,5 to 2% of the hydrazide is added. Acrylonitrile comonomers specified are acrylic and methacrylic acid esters, vinyl and vinylidene chloride, vinyl acetate, styrene and styrenesulphonic acids. Specified solvents are dimethylformamide, acetamide and sulphone, ehtylene glycol carbonate and butyrolactone while oxalic or adipic acid dihydrazide and methylene-bisthioglycolic acid hydrazide or methylene-bisthioglycolic and isopropylidene hydrazone are specified acid hydrazides.