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    Process for stabilizing oxymethylene copolymers
    2.
    发明授权
    Process for stabilizing oxymethylene copolymers 失效
    稳定甲醛共聚物的方法

    公开(公告)号：US4301273A

    公开(公告)日：1981-11-17

    申请号：US153674

    申请日：1980-05-27

    申请人： Akitoshi Sugio ,  Akira Amemiya ,  Tadashi Kunii ,  Tomotaka Furusawa ,  Mutsuhiko Takeda ,  Katsumasa Tanaka ,  Toshikazu Umemura

    发明人： Akitoshi Sugio ,  Akira Amemiya ,  Tadashi Kunii ,  Tomotaka Furusawa ,  Mutsuhiko Takeda ,  Katsumasa Tanaka ,  Toshikazu Umemura

    IPC分类号： B01F7/04 ,  B01F15/06 ,  B01J3/00 ,  B01J19/20 ,  C08G2/00 ,  C08G2/18 ,  C08G2/30 ,  C08G2/36 ,  C08G2/28

    CPC分类号： B01J3/006 ,  B01F15/065 ,  B01F7/042 ,  B01J19/20 ,  C08G2/00 ,  C08G2/36

    摘要： In a process for producing a stabilized oxymethylene copolymer which comprises heat-melting an oxymethylene copolymer having unstable, unblocked terminals obtained by the copolymerization of trioxane with a cyclic acetal and/or a cyclic ether to heat decompose it in the presence of available heat stabilizers; the improvement which comprises heating said oxymethylene copolymer having unblocked terminals in a mixer at a temperature between the melting point of said oxymethylene copolymer and a point 100.degree. C. higher than said melting point under a pressure of 0.1 mmHg to a atmospheric pressure for a mean residence time of 5 to 60 minutes, said mixer comprising a casing, a jacket for heating medium fitted over its external wall, and at least two stirring shafts equipped with a plurality of scraping blades disposed in said casing, said stirring shafts being capable of rotating in the same or different directions, and in the meantime, rotating said stirring shafts of said mixer to heat decompose said oxymethylene copolymer while renewing the surface of the molten oxymethylene copolymer.

    摘要翻译： 在制备稳定化的甲醛共聚物的方法中，该方法包括将具有不稳定的未封端末端的甲醛共聚物进行加热熔融，其通过三恶烷与环状缩醛和/或环醚的共聚得到，以在可用的热稳定剂存在下将其分解; 改进之处在于，在混合器中将所述具有未封端末端的甲醛共聚物在所述甲醛共聚物的熔点和高于所述熔点的高于所述熔点的100℃的温度下在0.1mmHg的压力下加热至平均气压 停留时间为5至60分钟，所述混合器包括壳体，装配在其外壁上的加热介质的护套，以及至少两个配备有设置在所述壳体中的刮刀的搅拌轴，所述搅拌轴能够旋转 在相同或不同的方向上，并且同时旋转所述混合器的所述搅拌轴以使所述甲醛共聚物分解，同时更新熔融的甲醛共聚物的表面。

    Process for continuously polymerizing trioxane
    4.
    发明授权
    Process for continuously polymerizing trioxane 失效
    连续聚合三恶烷的方法

    公开(公告)号：US4343929A

    公开(公告)日：1982-08-10

    申请号：US200065

    申请日：1980-10-23

    申请人： Akitoshi Sugio ,  Kazuyoshi Taka ,  Akira Amemiya ,  Tomotaka Furusawa ,  Mutsuhiko Takeda ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Yoshihiro Ono

    发明人： Akitoshi Sugio ,  Kazuyoshi Taka ,  Akira Amemiya ,  Tomotaka Furusawa ,  Mutsuhiko Takeda ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Yoshihiro Ono

    IPC分类号： B01J19/20 ,  C08G2/00 ,  C08G2/10 ,  C08G2/18

    CPC分类号： C08G2/00 ,  B01J19/20 ,  C08G2/10 ,  C08G2/18 ,  B01J2219/00779 ,  B01J2219/182

    摘要： A process for producing a polyacetal homopolymer or copolymer which comprises continuously feeding a liquid starting mixture containing molten trioxane and a catalyst and optionally a comonomer through a feed opening of a reactor, said reactor being a continuously stirring-type mixer having two stirring shafts having a plurality of plate-like paddles fixed thereto the cross-section of each of said paddles taken perpendicularly of the axial direction of the stirring shaft having a shape of a convex lens, an ellipse or a quasipolygon inscribing a phantom circle at each vertex, one of said paddles facing another paddle fixed to the other stirring shaft and said one paddle being positioned such that it rotates while the edges thereof keep a slight clearance from the inner surface of the barrel and the other paddle; polymerizing the starting mixture while moving it toward the discharge opening by the rotation of the paddles, the improvement wherein the profiles of the paddles are changed, or the arrangement of the paddles is changed continuously or stepwise, so that the transportability of the reaction mixture becomes progressively smaller from the feed opening toward the discharge opening of the reactor.

    摘要翻译： 一种制备聚缩醛均聚物或共聚物的方法，其包括通过反应器的进料口连续地供给含有熔融三恶烷和催化剂和任选的共聚单体的液体起始混合物，所述反应器是具有两个搅拌轴的连续搅拌型混合器， 多个板状的叶片固定在其上，垂直于搅拌轴的轴向垂直于每个顶点形成凸透镜，椭圆形或准圆体的形状的每个顶板上的假体圆的横截面， 所述桨叶面向固定到另一个搅拌轴的另一个桨叶，并且所述一个桨叶定位成使得其旋转，同时其边缘保持与筒体和另一个桨叶的内表面的微小间隙; 使起始混合物通过桨叶的旋转而朝向排出口移动而聚合起始混合物，改进了桨叶的轮廓改变，或者桨叶的排列被连续或逐步地改变，使得反应混合物的输送性变为 从进料口向反应器的排出口逐渐变小。

    Process for heat stabilizing oxymethylene copolymers
    5.
    发明授权
    Process for heat stabilizing oxymethylene copolymers 失效
    热稳定甲醛共聚物的方法

    公开(公告)号：US4366305A

    公开(公告)日：1982-12-28

    申请号：US322249

    申请日：1981-11-17

    申请人： Akira Amemiya ,  Tadashi Kunii ,  Tomotaka Furusawa ,  Mutsuhiko Takeda ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Yoshihiro Ono ,  Isamu Masumoto ,  Noriyasu Nakao ,  Masanori Furukawa

    发明人： Akira Amemiya ,  Tadashi Kunii ,  Tomotaka Furusawa ,  Mutsuhiko Takeda ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Yoshihiro Ono ,  Isamu Masumoto ,  Noriyasu Nakao ,  Masanori Furukawa

    IPC分类号： C08G2/00 ,  C08G2/18 ,  C08G2/30 ,  C08G2/36 ,  C08G2/28

    CPC分类号： C08G2/36 ,  C08G2/00 ,  C08G2/18 ,  B29C2947/92019 ,  B29C2947/92066 ,  B29C2947/92314 ,  B29C2947/924

    摘要： In a process for producing a stabilized oxymethylene copolymer by heat-melting, at a temperature ranging between the melting point of the copolymer and a temperature 100.degree. C. higher than the melting point in a degassing apparatus in the presence of a heat stabilizer, a crude oxymethylene copolymer of trioxane with a cyclic acetal or cyclic ether, to decompose and eliminate the instable portions of the copolymer, the improvement which comprises using as the degassing apparatus in heat stabilizing the crude oxymethylene copolymer a combination of (A) an extruder and (B) a surface renewing-type mixer, and carrying out the operation by first feeding a crude oxymethylene copolymer to said extruder (A) to heat-melt and decompose 30-90% by weight of the instable portions of the crude copolymer, removing the decomposed gas via a vent provided in said extruder, and thereafter introducing the molten resin continuously to said surface renewing-type mixer (B) where substantially all of the remaining instable portions of the oxymethylene copolymer are heat-decomposed until the content of the instable portions falls below about 2 wt. %, thereby heat stabilizing the copolymer; said extruder (A) having a single or a plurality of shafts, said surface renewing-type mixer functioning to mix and knead the resin thereby constantly renewing the surface of the resin to volatize the volatiles contained therein.

    摘要翻译： 在通过热熔制备稳定化的甲醛共聚物的方法中，在热稳定剂存在下，在共聚物的熔点和高于脱气装置中的熔点的温度范围内的温度范围内， 三恶烷与环缩醛或环醚的粗甲醛共聚物分解和消除共聚物的不稳定部分，其改进包括使用（A）挤出机和（A）挤出机的组合来将粗甲醛共聚物热稳定化作为脱气装置， B）表面更新型混合机，通过首先将粗甲醛共聚物进料到所述挤出机（A）进行加热熔融分解30-90重量％的粗共聚物的不稳定部分，除去 通过设置在所述挤出机中的排气口分解气体，然后将熔融树脂连续地引入到所述表面更新型混合器（B），其中基本上所有的再生 甲醛共聚物的不稳定部分被热分解直到不稳定部分的含量低于约2重量％。 ％，从而使共聚物热稳定化; 所述挤出机（A）具有单个或多个轴，所述表面更新型混合器用于混合和捏合树脂，从而不断地更新树脂的表面以挥发其中所含的挥发物。

    Process for continuous production of oxymethylene polymers
    6.
    发明授权
    Process for continuous production of oxymethylene polymers 失效
    连续生产甲醛聚合物的方法

    公开(公告)号：US4115369A

    公开(公告)日：1978-09-19

    申请号：US855905

    申请日：1977-11-29

    申请人： Akitoshi Sugio ,  Tomotaka Furusawa ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Hiroyuki Urabe

    发明人： Akitoshi Sugio ,  Tomotaka Furusawa ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Hiroyuki Urabe

    IPC分类号： C08G2/00 ,  B01J19/20 ,  C08G2/10 ,  C08G2/18

    CPC分类号： C08G2/18 ,  B01J19/20 ,  C08G2/10

    摘要： A process for continuously producing an oxymethylene polymer by continuously polymerizing a starting monomer containing at least 50 mole% of trioxane in bulk in the presence of a catalyst, which comprises feeding the starting monomer into a first-stage polymerization reactor having a self-cleaning action to perform a first-stage polymerization reaction until the conversion reaches 40 to 70%, withdrawing the reaction mixture as a powder from the outlet of the first-stage polymerization reactor, feeding the reaction mixture into a second-stage polymerization reactor having a stirring action to perform a second-stage polymerization reaction until the conversion reaches 95 to 100%, and then withdrawing the polymerization product as a powder from the outlet of the second-stage polymerization reactor.

    摘要翻译： 在催化剂存在下，通过连续聚合含有至少50摩尔％的三恶烷的起始单体的方法连续生产甲醛聚合物的方法，其包括将起始单体进料到具有自清洁作用的第一阶段聚合反应器中 进行第一阶段聚合反应，直到转化率达到40〜70％，从第一阶段聚合反应器的出口取出粉末状的反应混合物，将反应混合物进料到具有搅拌作用的第二阶段聚合反应器 进行第二阶段聚合反应，直至转化率达到95〜100％，然后从第二阶段聚合反应器的出口取出作为粉末的聚合产物。

    Process for preparing oxymethylene polymers
    7.
    发明授权
    Process for preparing oxymethylene polymers 失效
    制备甲醛聚合物的方法

    公开(公告)号：US4087411A

    公开(公告)日：1978-05-02

    申请号：US722671

    申请日：1976-09-13

    申请人： Akitoshi Sugio ,  Yoshiharu Ohtsuki ,  Toshikazu Umemura ,  Makoto Mizutani

    发明人： Akitoshi Sugio ,  Yoshiharu Ohtsuki ,  Toshikazu Umemura ,  Makoto Mizutani

    IPC分类号： C08G2/10 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30

    CPC分类号： C08G2/28 ,  C08G2/10 ,  C08G2/18 ,  C08G2/30

    摘要： A process for preparing oxymethylene polymers which comprises polymerizing trioxane or both trioxane and a specific cyclic ether in the presence of a catalytic amount of a boron fluoride-type catalyst, stopping the polymerization, and then subjecting the resulting polymer to a terminal stabilizing treatment, wherein the polymerization is stopped by adding a specific trivalent organic phosphorus compound and then the terminal stabilizing treatment is performed without removing the catalyst from the polymer.

    摘要翻译： 一种制备甲醛聚合物的方法，其包括在催化量的硼氟化物型催化剂存在下聚合三恶烷或三恶烷和特定环醚，停止聚合，然后使所得聚合物进行末端稳定化处理，其中 通过加入特定的三价有机磷化合物停止聚合，然后在不从聚合物中除去催化剂的情况下进行末端稳定化处理。

    Process for producing grafted polycarbonate resin
    9.
    发明授权
    Process for producing grafted polycarbonate resin 失效
    生产接枝聚碳酸酯树脂的方法

    公开(公告)号：US5426159A

    公开(公告)日：1995-06-20

    申请号：US91756

    申请日：1993-07-15

    申请人： Toshikazu Umemura

    发明人： Toshikazu Umemura

    IPC分类号： C08F290/06 ,  C08F283/02 ,  C08L69/00

    CPC分类号： C08F290/061

    摘要： Disclosed is a process for producing a grafted polycarbonate resin for optical use, which comprises adding to an aqueous suspension of an aromatic polycarbonate resin having radical-polymerizable unsaturated terminal group on a molecule wherein the aromatic polycarbonate resin has an average particle diameter of 0.1 to 5 mm and an apparent density of 0.2 to 0.9 g/cm.sup.3, a vinyl monomer and a radical-polymerization initiator, heating the aqueous suspension at a lower temperature by 5.degree. C. to 20.degree. C. than the decomposition temperature for a half-life period of 10 hours of the radical-polymerization initiator, thereby impregnating the polycarbonate resin with the vinyl monomer and the radical-polymerization initiator, then elevating the temperature to the range of from a lower temperature by 50.degree. C. to a higher temperature by 30.degree. C. than the decomposition temperature for a half-life period of 10 hours of the radical-polymerization initiator, thereby conducting a graft-polymerization reaction to obtain 90% by weight or more of conversion of vinyl monomer.

    摘要翻译： 公开了一种用于制造光学用接枝聚碳酸酯树脂的方法，其包括在芳族聚碳酸酯树脂的平均粒径为0.1〜5的分子上添加具有自由基聚合性不饱和端基的芳香族聚碳酸酯树脂的水性悬浮液 mm，表观密度为0.2〜0.9g / cm3，乙烯基单体和自由基聚合引发剂，将水性悬浮液在低于5℃〜20℃的温度下，比分解温度加热半衰期 自由基聚合引发剂10小时，由乙烯基单体和自由基聚合引发剂浸渍聚碳酸酯树脂，然后将温度升至50℃至更高的温度30℃ ℃比自由基聚合引发剂的10小时半衰期的分解温度，由此进行接枝聚合 以获得90重量％以上的乙烯基单体的转化率。

    Production method of polycarbonate resin pellets
    10.
    发明授权
    Production method of polycarbonate resin pellets 失效
    聚碳酸酯树脂颗粒的生产方法

    公开(公告)号：US5717055A

    公开(公告)日：1998-02-10

    申请号：US660573

    申请日：1996-06-11

    申请人： Tatsuhide Hosomi ,  Toshikazu Umemura ,  Toshiaki Takata ,  Yuji Mori

    发明人： Tatsuhide Hosomi ,  Toshikazu Umemura ,  Toshiaki Takata ,  Yuji Mori

    IPC分类号： C08G64/18 ,  C08G64/40 ,  C08G64/00

    CPC分类号： C08G64/40 ,  C08G64/18

    摘要： A method of producing polycarbonate resin pellets containing very less residual organic solvent and low molecular weight volatile matters and having a high transparency by melt-kneading a polycarbonate resin powder in an extruder equipped with a screw having a material seal mechanism, and vents, and devolatilizing the residual organic solvent and/or the low molecular weight volatile matters at the vent portion and then extruding the molten resin. The polycarbonate resin pellets are suitable for optical grade articles and automobile lenses.

    摘要翻译： 一种制备聚碳酸酯树脂颗粒的方法，该聚碳酸酯树脂颗粒含有非常少的残余有机溶剂和低分子量挥发性物质，并且通过在装有具有材料密封机构的螺杆的挤出机和排气口中熔融捏合聚碳酸酯树脂粉末而具有高透明度，并且脱挥发份 残留有机溶剂和/或低分子挥发性物质，然后挤出熔融树脂。 聚碳酸酯树脂颗粒适用于光学级制品和汽车镜片。