JPS5848568B

• Main Authors: KISHIDA YASUO, OGAWA YASUHIRO
• Format: Patent
• Language: English
• Published: 29.10.1983
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; 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; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MAKING GRANULES OR PREFORMS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PURPOSE:To produce titled molding having excellent spinnability, physical properties and elastic properties, by reacting specified polyurethane-forming materials and then melt-extruding the product into chips. CONSTITUTION:Into a reaction vessel equipped with an agitating means and a heating means are introduced (A) an organic diisocyanate such as 4,4'-diphenylmethane diisocyanate, (B) a polyol, MW700-3,000, such as polyethylene adipate and (C) a chain extender having at least two hydroxyl groups in the molecule, MW<=500, such as bis-beta-hydroxyethoxybenzene, so that the eq. ratio of isocyanato groups to hydroxyl groups is 1.00-1.10. The reaction mixture is then reacted at 60-150 deg.C for 10-100min, and removed from the system at the point when the reaction product is in a solid state and the isocyanato group content reaches 0.05- 0.20eq/kg. Then, this reaction product is melt-extruded at 230 deg.C or below into chips.