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    Polyphenylene sulfide containing covalently bonded chlorine in a reduced amount
    2.
    发明授权
    Polyphenylene sulfide containing covalently bonded chlorine in a reduced amount 失效
    含有共价键合氯的聚苯硫醚减少量

    公开(公告)号：US4820801A

    公开(公告)日：1989-04-11

    申请号：US924915

    申请日：1986-10-29

    申请人： Hiroshi Inoue ,  Toshikazu Kato ,  Masaaki Otsuru ,  Noriaki Emura

    发明人： Hiroshi Inoue ,  Toshikazu Kato ,  Masaaki Otsuru ,  Noriaki Emura

    IPC分类号： C08G75/02 ,  C08K5/37 ,  C08G75/14

    CPC分类号： C08G75/0286 ,  C08G75/0281 ,  C08K5/37

    摘要： A highly modified polyphenylene sulfide (hereinafter refer to as "PPS") which contains covalently bonded chlorine in a far less amount than conventional PPS's and is substantially free from ionically bonded chlorine and sodium, is produced by heat-treating a conventional PPS with at least one of organic, sulfur-containing compounds in a solvent capable of dissolving the PPS. Such a PPS is very useful as a coating or encapsulating material for electrical and electronic components, etc.

    摘要翻译： 通过将常规PPS至少具有热处理的方法制造出高度改性的聚苯硫醚（以下称为“PPS”），其含有远低于常规PPS的共价键，并且基本上不含离子键合氯和钠 在能够溶解PPS的溶剂中的有机，含硫化合物之一。 这样的PPS作为用于电气和电子部件等的涂层或封装材料是非常有用的

    Process for producing a polyarylene sulfide with controlled ratio of alkali metal sulfide to water
    4.
    发明授权
    Process for producing a polyarylene sulfide with controlled ratio of alkali metal sulfide to water 失效
    用碱金属硫化物与水的比例制备聚芳硫醚的方法

    公开(公告)号：US4794161A

    公开(公告)日：1988-12-27

    申请号：US943009

    申请日：1986-12-18

    申请人： Toshikazu Kato ,  Hiroshi Inoue ,  Noriaki Emura

    发明人： Toshikazu Kato ,  Hiroshi Inoue ,  Noriaki Emura

    IPC分类号： C08G75/02 ,  C08G75/06 ,  C08G75/16

    CPC分类号： C08G75/0231 ,  C08G75/025

    摘要： A polyarylene sulfide having a low content of heavy metals and excellent heat stability is produced by mixing an alkali metal sulfide, water, and an organic polar solvent in the molar ratio of about 1:10 to 20:1 to 10 and by heating the mixture to remove water and then polymerizing the resulting mixture with a polyhalogenated aromatic compound. Such a polyarylene sulfide is very useful for use in electronic components and automotive parts, etc.

    摘要翻译： 通过将碱金属硫化物，水和有机极性溶剂以约1:10至20:1至10的摩尔比混合并通过加热混合物来制备重金属含量低和热稳定性优异的聚芳硫醚 以除去水，然后用多卤代芳族化合物使所得混合物聚合。 这种聚芳硫醚对于用于电子部件和汽车部件等是非常有用的

    Preparation of poly (arylene sulfide) from dihalo aromatic hydroxyl compound
    5.
    发明授权
    Preparation of poly (arylene sulfide) from dihalo aromatic hydroxyl compound 失效
    由二卤代芳族羟基化合物制备聚（亚芳基硫醚）

    公开(公告)号：US4868275A

    公开(公告)日：1989-09-19

    申请号：US234046

    申请日：1988-08-19

    申请人： Toshikazu Kato ,  Hiroshi Inoue ,  Satoshi Tomagou ,  Noriaki Emura

    发明人： Toshikazu Kato ,  Hiroshi Inoue ,  Satoshi Tomagou ,  Noriaki Emura

    IPC分类号： C08G75/02 ,  C08G75/06

    CPC分类号： C08G75/0254 ,  C08G75/0218

    摘要： In a process in which a poly (arylene sulfide) is synthesized by reacting a dihaloaromatic compound and an alkali metal sulfide in a polar organic solvent, the curing ability of the product polymer is significantly enhanced by introducing a small proportion of a hydroxyl group-containing polyhaloaromatic compound to the reaction mixture when a conversion of at least 60% has been achieved with respect to the dihaloaromatic compound present in the reaction mixture. The product polymer may be advantageously employed in various molding, forming or coating processes to provide the produced articles with increased strengths. The hydroxyl groups introduced into the polymer enable the polymer to be modified, if desired.

    Process for partially curing polyarylene sulfides
    6.
    发明授权
    Process for partially curing polyarylene sulfides 失效
    部分固化聚亚芳基硫化物的方法

    公开(公告)号：US4918134A

    公开(公告)日：1990-04-17

    申请号：US318797

    申请日：1989-03-03

    申请人： Toshikazu Kato ,  Hiroshi Inoue ,  Noriaki Emura

    发明人： Toshikazu Kato ,  Hiroshi Inoue ,  Noriaki Emura

    IPC分类号： C08L81/02 ,  C08G75/02 ,  C08K3/26 ,  C08K3/34 ,  C08K3/36

    CPC分类号： C08K3/34 ,  C08G75/0277 ,  C08G75/0295 ,  C08K3/26 ,  C08K3/36

    摘要： In a process for partially curing a powdery polyarylene sulfide resin which comprises heating the powdery resin either in the absence or presence of oxygen while agitating so as to attain an increased melt viscosity in a range suitable for further processing or molding of the resin, an improvement comprising that the resin together with an added specific inorganic additive undergoes the partial curing treatment at temperatures in the range of from a temperature just below the melting point of the starting resin down to a temperature lower by 80.degree. C. than said melting point. The additive is selected from the group consisting of silica, hydrophobic silica, talc and calcium carbonate and mixtures thereof. By use of the additive, the powder characteristics or fluidity properties of the starting resin are substantially retained during and after the partial curing treatment, the static electricity generated by agitation of the resin during the treatment is significantly reduced, and the resin is effectively prevented from forming scaling on the interior walls of the reactor vessel used for the process. Therefore, the agitation of the powdery resin can be uniformly and efficiently effected so that a desired control of the melt viscosity is easily achieved.

    Process for preparing polyarylene sulfides with recovery of carboxylic acid
    7.
    发明授权
    Process for preparing polyarylene sulfides with recovery of carboxylic acid 失效
    制备聚亚芳硫醚与回收羧酸的方法

    公开(公告)号：US4845190A

    公开(公告)日：1989-07-04

    申请号：US137693

    申请日：1987-12-24

    申请人： Hiroshi Inoue ,  Toshikazu Kato ,  Noriaki Emura

    发明人： Hiroshi Inoue ,  Toshikazu Kato ,  Noriaki Emura

    IPC分类号： C08G75/02 ,  C08G75/06

    CPC分类号： C08G75/0281 ,  C08G75/0254

    摘要： In a process for preparing polyarylene sulfides by reacting a dihalo-aromatic compound with a sulfur source in an organic amide solvent in the presence of an alkali metal salt of carboxylic acid as a polymerization aid or assistant, a specific class of carboxylic acids are employed for preparing the alkali metal salt polymerization aid. The specific carboxylic acids are of the general formula: R(COOH).sub.n (wherein R is a C.sub.1 -C.sub.20 organic radical and n is an integer not less than 1) and have a solubility of not less than 3 g/100 ml in ethanol at 20.degree. C. Use of such a carboxylic acid in the process permits the recovery thereof from the polymerization mixture to be effected with significantly improved efficiency.