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    Impact resistant moldable polyacetal resin compositions and processes for making same
    52.
    发明授权
    Impact resistant moldable polyacetal resin compositions and processes for making same 失效
    抗冲击塑料聚酯树脂组合物及其制备方法

    公开(公告)号：US5183860A

    公开(公告)日：1993-02-02

    申请号：US673984

    申请日：1991-03-25

    申请人： Osamu Kashihara

    发明人： Osamu Kashihara

    IPC分类号： C08G18/56 ,  C08L59/00 ,  C08L75/00 ,  C08L75/04

    CPC分类号： C08L59/00 ,  C08G18/56 ,  C08L75/04

    摘要： Moldable polyacetal resin compositions include a polyacetal base resin and an impact resistant effective amount of a thermoplastic polyurethane resin melt-blended therewith. The polyacetal base resin is itself a mixture of (A.sub.1) a low hydroxyl-containing (LHC) polyacetal resin having less than 50 mmol/kg hydroxyl groups in its molecule, and (A.sub.2) a high hydroxyl-containing (HHC) polyacetal resin having greater than 50 mmol/kg hydroxyl groups in its molecule. The polyacetal resin compositions optionally may include a reactive compound having at least one reactive moiety to further enhance the desirable properties that are achieved by inclusion of the HHC polyacetal resin. The components are melt-blended and subjected to conditions (which typically occur during the melt-blending step) to allow the polyurethane resin to react with the HHC polyacetal resin. As a result, a compatibilizing copolymer is formed in situ so that the polyurethane resin is compatabilized with the LHC polyacetal resin thereby minimizing delamination and increasing weld strengths of molded articles formed of the same.

    Melt-stable polyester resins and molded articles thereof
    53.
    发明授权
    Melt-stable polyester resins and molded articles thereof 失效
    熔融稳定的聚酯树脂及其模塑制品

    公开(公告)号：US5182359A

    公开(公告)日：1993-01-26

    申请号：US720156

    申请日：1991-06-27

    申请人： Keiichi Kanaka ,  Kenji Hijikata

    发明人： Keiichi Kanaka ,  Kenji Hijikata

    IPC分类号： B29C47/00 ,  C08G63/66 ,  C08G63/668 ,  C08G63/672 ,  C08J5/18

    CPC分类号： C08G63/672

    摘要： Moldable polyester resins having high melt-phase stability and which form substantially no thermal decomposition products during melt-phase processing have a carboxyl end group concentration of no greater than 40 milliequivalent/kg, and are the reaction product of (a) an aromatic dicarboxylic acid or its ester-forming derivative, (b) an aliphatic dihydroxy compound having 2 to 8 carbon atoms, and (c) an ester-forming comonomer having the general formula (I):HO--R--O--A--O--R--OH (I)wherein A represents a divalent organic radical having at least one aromatic ring, R represents a divalent organic radical selected from the group consisting of aliphatic hydrocarbon groups and polyoxyalkylene groups each having 2 to 8 carbon atoms. The ester-forming comonomer is incorporated into the polyester resin chain in an amount between 0.01 to 7 molar %, based on the aromatic dicarboxylic acid.

    摘要翻译： 具有高熔融相稳定性并且在熔融相加工中基本上不形成热分解产物的可模塑聚酯树脂的羧基端基浓度不大于40毫当量/ kg，并且是（a）芳族二羧酸 或其酯形成衍生物，（b）具有2至8个碳原子的脂族二羟基化合物，和（c）具有通式（I）的酯形成共聚单体：HO-ROAOR-OH（I）其中A表示 具有至少一个芳环的二价有机基团，R表示选自具有2至8个碳原子的脂族烃基和聚氧化烯基团的二价有机基团。 基于芳族二羧酸，酯形成共聚单体以0.01至7摩尔％的量引入聚酯树脂链中。

    Polyester which exhibits melt anisotropy
    54.
    发明授权
    Polyester which exhibits melt anisotropy 失效
    具有熔体各向异性的聚酯

    公开(公告)号：US5179192A

    公开(公告)日：1993-01-12

    申请号：US763245

    申请日：1991-09-20

    申请人： Keiichi Kanaka ,  Noriyuki Hayashi ,  Toshihiro Kobashi ,  Yukihiko Kageyama ,  Kenji Hijikata

    发明人： Keiichi Kanaka ,  Noriyuki Hayashi ,  Toshihiro Kobashi ,  Yukihiko Kageyama ,  Kenji Hijikata

    IPC分类号： C08G63/60 ,  C09K19/38

    CPC分类号： C09K19/3809 ,  C08G63/605

    摘要： An improved polyester exhibiting melt anisotropy and excellent thermal stability is provided which consists essentially of the structural units (I) to (III) wherein: ##STR1## wherein Ar.sub.1 is 1,4-phenylene, Ar.sub.2 is a mixed system of 2,6-naphthalene and 2,7-naphthalene, and Ar.sub.3 is an aromatic ring containing 6 or more carbon atoms, the unit (I) accounting for 15 to 90 mole percent and the unit (II) for 20 to 70 mole percent of the total amount of the structural units, and the percentage of 2,7-naphthalene to the total amount of Ar.sub.2 in the unit (II) being between 10 and 90 mole percent.

    摘要翻译： 提供了具有熔融各向异性和优异的热稳定性的改进聚酯，其基本上由结构单元（I）至（III）组成，其中：其中Ar 1是1,4-亚苯基，Ar 2是 2,6-萘和2,7-萘的混合体系，Ar 3为含有6个以上碳原子的芳香环，单元（I）占15〜90摩尔％，单元（II）为20〜 结构单元总量的70摩尔％，和单元（II）中的Ar 2的总量的2,7-萘的百分比为10〜90摩尔％。

    Polyester resin molding compositions and molded articles formed of the same
    59.
    发明授权
    Polyester resin molding compositions and molded articles formed of the same 失效
    聚酯树脂模塑组合物及其形成的成型制品

    公开(公告)号：US5115004A

    公开(公告)日：1992-05-19

    申请号：US744500

    申请日：1991-08-14

    申请人： Mitsuhiro Mochizuki ,  Mitsuo Wada ,  Hiromitsu Seitou

    发明人： Mitsuhiro Mochizuki ,  Mitsuo Wada ,  Hiromitsu Seitou

    IPC分类号： C08G63/183 ,  C08G63/181 ,  C08K5/10 ,  C08K5/15 ,  C08K5/1545 ,  C08L67/00 ,  C08L67/02

    CPC分类号： C08K5/15 ,  C08L67/02

    摘要： Polyester resin molding compositions exhibiting exceptional low temperature physical properties (i.e., flexibility and toughness) and satisfactory mold-release properties include a melt-blend of a polyester base resin (preferably one which predominantly contains polybutylene terephthalate units), a polyester elastomer (preferably a copolyester having hard and soft segments), and a mold-release effective amount of a sorbitan ester (preferably an ester reaction product of a sorbitan with fatty acid having at least 12 carbon atoms). The sorbitan ester most preferably has a hydroxyl value of between 50 to 400, exclusive, so that blooming during injection molding operations (e.g., a predrying stage) is minimized (if not eliminated entirely). Molded articles formed of the compositions of this invention may be used in a variety of applications, for example, as parts for the automotive and/or electronics industries.