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    • 4. 发明专利
    • Method for producing polyacetal resin composition and polyacetal resin composition
    • 生产聚乙烯树脂组合物和聚乙烯树脂组合物的方法
    • JP2011116862A
    • 2011-06-16
    • JP2009275836
    • 2009-12-03
    • Asahi Kasei Chemicals Corp旭化成ケミカルズ株式会社
    • OKA MIKIOHASHIMOTO YOSHIYUKI
    • C08L59/02C08G2/08C08K5/24
    • PROBLEM TO BE SOLVED: To provide a method for producing a polyacetal resin composition, having excellent long-time continuous extrusion productivity, and capable of effectively reducing thermal decomposition and deterioration of a material. SOLUTION: The method for producing the polyacetal resin composition includes a step for obtaining a polyacetal resin homopolymer (A) having a heating weight loss of 0.1-1.0 mass% when heated for 50 min at 222°C under ≤-500 mmHg of a pressure condition, a step for regulating the water content of an acrylamide polymer (B) containing a structure represented by general formulas (I) and/or (II) so as to be ≤1,500 ppm, a step for regulating the water content of a hydrazide compound (C) so as to be ≤1,500 ppm, and a step for melt-kneading the polyacetal resin homopolymer (A), the acrylamide polymer (B), the hydrazide compound (C) and a hindered phenol-based antioxidant (D). COPYRIGHT: (C)2011,JPO&INPIT
    • 待解决的问题:提供一种具有优异的长时间连续挤出生产率并且能够有效地减少材料的热分解和劣化的聚缩醛树脂组合物的制造方法。 解决方案:聚缩醛树脂组合物的制造方法包括在222℃,≤-500mmHg下加热50分钟时获得加热重量减少为0.1〜1.0质量%的聚缩醛树脂均聚物(A)的工序 的压力条件,用于调节含有由通式(I)和/或(II)表示的结构的丙烯酰胺聚合物(B)的含水量为≤1,500ppm的步骤,用于调节含水量的步骤 的酰肼化合物(C)的含量为≤1,500ppm,以及将聚缩醛树脂均聚物(A),丙烯酰胺聚合物(B),酰肼化合物(C)和受阻酚系抗氧化剂 (D)。 版权所有(C)2011,JPO&INPIT
    • 10. 发明专利
    • JPH0733443B2
    • 1995-04-12
    • JP30676488
    • 1988-12-02
    • C08F2/18C08G2/00C08G2/08C08G12/40C08G18/00C08G18/08C08G85/00
    • A method for preparing polymer microparticles which are stably dispersed in a nonaqueous medium involves: (a) mixing into a nonaqueous medium a polymerizable component at least 20 percent of which is insoluble in the nonaqueous medium, said polymerizable component comprising at least one polymerizable species; (b) subjecting the mixture of (a) to stress sufficient to particulate the mixture; (c) polymerizing the polymerizable component within each particle under conditions sufficient to produce polymer microparticles stably dispersed in the nonaqueous medium, said polymer microparticles being insoluble in the nonaqueous medium and the nonaqueous medium being substantially free of dissolved polymer, said polymer microparticles further characterized in that less than 20 percent of the polymer microparticles have a mean diameter greater than 5 microns. a