| 摘要 |
PROBLEM TO BE SOLVED: To provide a branched or cross-linked polyacetal resin equipped with both of melt tension and draw down property which are important characteristics for blow-molding and extrusion-molding, with flow property, and enabling the excellent molding processability in the blow-molding, etc., and the production of a molded article having an excellent surface appearance. SOLUTION: This method for producing the branched or cross-linked polyacetal resin is provided by performing the bulk polymerization of (A) trioxane, (B) a compound selected from a cyclic ether and cyclic formal and (C) a glycidyl ether compound by using (D) a cationic polymerization catalyst, obtaining a solid state copolymer once, then heat-treating the copolymer under molten state or in an organic solvent without performing an inactivation treatment of the catalyst and then performing the inactivation treatment of the cationic polymerization catalyst. COPYRIGHT: (C)2005,JPO&NCIPI
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