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    PROCESS FOR PRODUCTION OF OXYMETHYLENE COPOLYMER
    1.
    发明申请
    PROCESS FOR PRODUCTION OF OXYMETHYLENE COPOLYMER 审中-公开

    公开(公告)号：US20180265617A1

    公开(公告)日：2018-09-20

    申请号：US15532266

    申请日：2015-12-01

    申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC.

    发明人： Daigo NAKAYA ,  Toru TAKAHASHI ,  Satoshi MOCHIDA ,  Kensuke OSHIMA

    IPC分类号： C08G2/10 ,  C08G2/28

    CPC分类号： C08G2/10 ,  C08G2/06 ,  C08G2/24 ,  C08G2/28 ,  C08L59/04

    摘要： The invention provides a method for producing an oxymethylene copolymer including a polymerization step for cationically polymerizing trioxane and a comonomer at a polymerization temperature of from 135 to 300° C. in the presence of at least one salt of a protonic acid having a molecular weight of 1,000 or less, and at least one polymerization initiator selected from the group consisting of protonic acids having a molecular weight of 1,000 or less, protonic acid anhydrides having a molecular weight of 1,000 or less, and protonic acid ester compounds having a molecular weight of 1,000 or less; wherein the total concentration of metal components contained in the trioxane and comonomer used in the polymerization step is 300 ppb by mass or less.

    TRIOXANE COMPOSITION AND METHOD FOR STORING THE SAME
    3.
    发明申请
    TRIOXANE COMPOSITION AND METHOD FOR STORING THE SAME 有权
    三元组合物及其存储方法

    公开(公告)号：US20160168324A1

    公开(公告)日：2016-06-16

    申请号：US14902652

    申请日：2014-06-30

    申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC.

    发明人： Yumi OKUI ,  Daisuke KOBAYASHI ,  Akira ITO

    IPC分类号： C08G65/16

    CPC分类号： C08G65/16 ,  C07D323/06 ,  C08G2/10 ,  C08G2/24 ,  C08L59/04

    摘要： The present invention provides a trioxane composition which comprises trioxane as a main component, an antioxidant, and at least one alkaline organic compound selected from the group consisting of an amine compound having an alcoholic hydroxy group in the molecule thereof, a thiocarbamate compound, and an organophosphorus compound, wherein the amount of the alkaline organic compound contained is 0.01 to 10 ppm, based on the trioxane, and wherein the trioxane composition is a liquid.

    摘要翻译： 本发明提供以三恶烷为主要成分的三氧杂环己烷组合物，抗氧化剂和至少一种选自分子中具有醇羟基的胺化合物，硫代氨基甲酸酯化合物和 有机磷化合物，其中所述碱性有机化合物的含量相对于三恶烷为0.01〜10ppm，并且其中所述三恶烷组合物为液体。

    METHOD FOR PRODUCING AN OXYMETHYLENE COPOLYMER
    4.
    发明申请
    METHOD FOR PRODUCING AN OXYMETHYLENE COPOLYMER 审中-公开
    生产甲基苯乙烯共聚物的方法

    公开(公告)号：US20160102190A1

    公开(公告)日：2016-04-14

    申请号：US14892319

    申请日：2014-05-23

    申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC.

    发明人： Akira ITO ,  Sunao MIKAMI

    IPC分类号： C08K5/17 ,  C08K5/134

    CPC分类号： C08K5/17 ,  C08G2/04 ,  C08G2/06 ,  C08G2/10 ,  C08G2/24 ,  C08G4/00 ,  C08K5/134 ,  C08L59/04

    摘要： Provided is a method for producing an oxymethylene copolymer having excellent extrusion moldability and reduced voids in a molded article without lowering the inherent performance of an oxymethylene copolymer. Provided is a method for producing an oxymethylene copolymer, including: a step for copolymerizing a monomer raw material containing trioxane and 5-7 mass % of 1,3-dioxolane relative to the trioxane, in the presence of 0.025-0.07 mmol of boron trifluoride per mol of trioxane and 0.006-2.0 mass % of sterically hindered phenol relative to the trioxane; a step for adding a polymerization terminator to the reaction system when the polymerization yield of this copolymer has reached 92% or higher, and terminating polymerization; and a thermal stabilization step for heating and melting the crude oxymethylene copolymer in the presence of 0.05-5 mass % of an antioxidant and 0.005-5 mass % of a nitrogen-containing compound relative to the crude oxymethylene copolymer.

    摘要翻译： 提供一种在不降低甲醛共聚物的固有性能的情况下，在模塑制品中制备具有优异的挤出成型性和减小的空隙的甲醛共聚物的方法。 提供一种甲醛共聚物的制造方法，其包括：在0.025-0.07mmol三氟化硼的存在下，使含有三恶烷的单体原料和5-7质量％的1,3-二氧戊环相对于三恶烷共聚的工序 相对于三恶烷，每摩尔三恶烷和0.006-2.0质量％的空间位阻酚; 当该共聚物的聚合产率达到92％以上并终止聚合时，向反应体系中加入聚合终止剂的步骤; 以及相对于粗制甲醛共聚物，在0.05-5质量％的抗氧化剂和0.005-5质量％的含氮化合物的存在下加热和熔融粗制甲醛共聚物的热稳定步骤。

    Oxymethylene copolymers and process for their preparation
    6.
    发明授权
    Oxymethylene copolymers and process for their preparation 失效
    甲醛共聚物及其制备方法

    公开(公告)号：US4691000A

    公开(公告)日：1987-09-01

    申请号：US850550

    申请日：1986-04-11

    申请人： Andre Collart ,  Fredy Declerck

    发明人： Andre Collart ,  Fredy Declerck

    IPC分类号： C08G2/00 ,  C08G2/18 ,  C08G2/22 ,  C08G2/24 ,  C08G10/02 ,  C08G79/02

    CPC分类号： C08G2/22 ,  C08G2/24

    摘要： Copolymers containing oxymethylene and 2-fluoromethoxyethylene repeat units. These copolymers, of improved heat stability, may be prepared by copolymerizing trioxane with a derivative of a cyclic ether whose molecule contains at least two adjacent carbon atoms and in which an oxymethylene group carries a fluoromethyl substituent, especially epifluorohydrin.

    摘要翻译： 含有甲醛和2-氟甲氧基乙烯重复单元的共聚物。 这些具有改善的热稳定性的共聚物可以通过使三恶烷与分子含有至少两个相邻碳原子的环状醚的衍生物共聚而制备，并且其中亚甲基含有氟甲基取代基，特别是表氟醇。