公开(公告)号：US4681927A

公开(公告)日：1987-07-21

申请号：US866959

申请日：1986-05-27

申请人： Toshikazu Umemura ,  Isamu Masumoto ,  Yukihiro Iha

发明人： Toshikazu Umemura ,  Isamu Masumoto ,  Yukihiro Iha

IPC分类号： C08G2/00 ,  C08G2/18 ,  C08G2/22 ,  C08G2/24 ,  C08G2/10 ,  C08G2/16

CPC分类号： C08G2/18

摘要： A process for producing an oxymethylene copolymer by copolymerizing trioxane with at least one cyclic comonomer selected from the group consisting of cyclic ethers and cyclic formals, said process comprising (1) polymerizing trioxane alone or with a cyclic comonomer in the presence of a polymerization catalyst until the conversion of trioxane reaches 10 to 95%, and(2) thereafter adding a cyclic comonomer and a polymerization catalyst to the reaction system and continuing the polymerization.

摘要翻译： 一种通过将三恶烷与至少一种选自环醚和环状缩甲醛的环状共聚单体共聚制备甲醛共聚物的方法，所述方法包括（1）在聚合催化剂存在下单独或与环状共聚单体聚合三恶烷直到 三恶烷的转化率达到10〜95％，（2）向反应体系中加入环状共聚单体和聚合催化剂，继续聚合。

公开(公告)号：US06586567B2

公开(公告)日：2003-07-01

申请号：US09883277

申请日：2001-06-19

申请人： Yuji Takeda ,  Akio Hasebe ,  Isamu Masumoto ,  Akira Mitsui

发明人： Yuji Takeda ,  Akio Hasebe ,  Isamu Masumoto ,  Akira Mitsui

IPC分类号： C08G6538

CPC分类号： C08G65/46 ,  C08G65/44

摘要： A process for producing a polyphenylene ether, which comprises contacting, with an aqueous solution of a chelating agent, a polyphenylene ether solution and adding a water-soluble poor solvent for the polyphenylene ether to precipitate the polyphenylene ether; and recovering the thus precipitated polyphenylene ether. A mixture remaining after the recovery of the polyphenylene ether is brought into contact with water to extract the water-soluble poor solvent, and a water phase containing the thus extracted water-soluble poor solvent is recovered by separation. The water-soluble poor solvent is separated and removed from the water phase by distillation, and the whole or a part of the remaining water phase is recycled as water to be brought into contact with the mixture, the remaining water phase having a content of a high-boiling-point organic substance of 1 wt. % or less.

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。

公开(公告)号：US06617416B2

公开(公告)日：2003-09-09

申请号：US10257476

申请日：2002-10-15

申请人： Takahiro Nakamura ,  Masanori Furukawa ,  Akira Okamura ,  Daigo Nakaya ,  Isamu Masumoto

发明人： Takahiro Nakamura ,  Masanori Furukawa ,  Akira Okamura ,  Daigo Nakaya ,  Isamu Masumoto

IPC分类号： C08G222

CPC分类号： C08L59/04 ,  C08G2/18 ,  C08K5/3492

摘要： A polyoxymethylene copolymer which is a polyoxymethylene copolymer obtained by copolymerizing trioxane and 8 to 20 mol, per 100 mol of the trioxane, of 1,3-dioxolane and which (i) has a crystallization time period of 10 to 2,000 seconds at 143° C., (ii) withstands 30 to 1,000 cycles of a bending durability test and (iii) has residence heat stability for 40 minutes or more, and a molded article formed of the copolymer. According to the present invention, there can be provided a polyoxymethylene copolymer excellent in bending durability and heat stability and excellent in moldability, and a molded article formed thereof.

摘要翻译： 聚氧亚甲基共聚物，其是通过使三恶烷和每摩尔三恶烷为8〜20摩尔的1,3-二氧戊环共聚得到的聚甲醛共聚物，（i）在143℃下的结晶时间为10〜2000秒 ，（ii）经受30〜1000次弯曲耐久性试验循环，（iii）具有40分钟以上的停留热稳定性，以及由共聚物形成的成型体。根据本发明，可以提供聚甲醛 共聚物弯曲耐久性和热稳定性优异，成型性优异的共聚物及其成型体。

公开(公告)号：US5187218A

公开(公告)日：1993-02-16

申请号：US740617

申请日：1991-08-05

申请人： Isamu Masumoto ,  Zenpei Mizutani ,  Hiroshi Yada ,  Yoshihito Hara

发明人： Isamu Masumoto ,  Zenpei Mizutani ,  Hiroshi Yada ,  Yoshihito Hara

IPC分类号： C08K5/11 ,  C08L59/00 ,  C08L71/00

CPC分类号： C08L59/00 ,  C08L71/00

摘要： An acetal resin composition comprising:(A) 100 parts by weight of an acetal resin,(B) 0.01 to 5 parts by weight of a terminal-etherified polyalkylene glycol of the formula (I)R.sup.1 --O--(--R.sup.2 --O--).sub.m --R.sup.3wherein R.sup.1 is a hydrogen atom, an aliphatic hydrocarbon group having 1 to 7 carbon atoms, an aryl group or an aralkyl group, R.sup.2 is an alkylene group having 2 to 3 carbon atoms, R.sup.3 is an aliphatic hydrocarbon group having 1 to 7 carbon atoms, an aryl group or an aralkyl group, and m is a number of at least 20, and(C) 0.01 to 2 parts by weight of an ester from a polyhydric alcohol having 2 to 10 carbon atoms and a higher fatty acid having 22 to 32 carbon atoms. This acetal resin composition has highly improved mold releasability when injection-molded without any substantial impairment of mechanicla properties and thermal stability inherent to an acetal resin and gives precision molded articles having little molding strain.

公开(公告)号：US06433128B1

公开(公告)日：2002-08-13

申请号：US09855781

申请日：2001-05-16

申请人： Takahiro Nakamura ,  Akira Okamura ,  Masanori Furukawa ,  Isamu Masumoto ,  Kaneo Yoshioka ,  Kazumasa Maji

发明人： Takahiro Nakamura ,  Akira Okamura ,  Masanori Furukawa ,  Isamu Masumoto ,  Kaneo Yoshioka ,  Kazumasa Maji

IPC分类号： C08G1002

摘要： A process for producing an oxymethylene copolymer by polymerizing trioxan and 1,3-dioxolan in the presence of a cationically active catalyst, wherein (1) 1,3-dioxolan is used in an amount of 0.01 to 2.9 mol % based on trioxan; and (2) the cationically active catalyst is used in an amount of 1×10−7 to 1.2×10−4 mol based on 1 mol of trioxan. The process of the present invention makes it possible to obtain at a high yield an oxymethylene copolymer which has almost as high mechanical strength and stiffness as an oxymethylene homopolymer while retaining the tenacity and heat stability of an oxymethylene copolymer.

公开(公告)号：US4814424A

公开(公告)日：1989-03-21

申请号：US120314

申请日：1987-11-13

申请人： Takeo Suzumori ,  Isamu Masumoto ,  Mitsuo Nakagawa ,  Yukihiro Iha

发明人： Takeo Suzumori ,  Isamu Masumoto ,  Mitsuo Nakagawa ,  Yukihiro Iha

IPC分类号： C08G59/30 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30 ,  C08G2/36 ,  C08G2/26

CPC分类号： C08G2/36

摘要： An improved method of stabilizing a polyoxymethylene copolymer, which comprises(1) heat-melting a crude copolymer of trioxane and a cyclic ether and/or a cyclic acetal to form a first stabilized copolymer having a decomposition ratio (D.sub.220.sup.60), determined when it is heated at 220.degree. C. for 60 minutes in vacuum, of up to 2% by weight, and then(2) bringing the first stabilized copolymer into contact with steam containing 0.01 to 5% by weight of a basic compound at a temperature of at least 100.degree. C. but not exceeding the melting point of the copolymer to form a second stabilized copolymer.

摘要翻译： 一种稳定聚甲醛共聚物的改进方法，其包括（1）将三恶烷和环醚和/或环缩醛的粗共聚物加热熔融以形成具有分解比（D22060）的第一稳定共聚物，当其为 在220℃下真空加热60分钟，最多达2重量％，然后（2）使第一稳定的共聚物与含有0.01至5重量％碱性化合物的蒸汽在温度为 至少100℃，但不超过共聚物的熔点以形成第二稳定的共聚物。

公开(公告)号：US4246398A

公开(公告)日：1981-01-20

申请号：US35503

申请日：1979-05-02

申请人： Akitoshi Sugio ,  Atsuo Kuramoto ,  Takao Kawaki ,  Hiroyuki Urabe ,  Tatsuhiko Kurihara ,  Isamu Masumoto ,  Akio Hasebe

发明人： Akitoshi Sugio ,  Atsuo Kuramoto ,  Takao Kawaki ,  Hiroyuki Urabe ,  Tatsuhiko Kurihara ,  Isamu Masumoto ,  Akio Hasebe

IPC分类号： C08G65/00 ,  C08G65/46 ,  C08G65/44

CPC分类号： C08G65/46

摘要： A method for recovering polyphenylene oxide having a high bulk density and a reduced content of fine particles from a solution of a polyphenylene oxide, which comprises adding a non-solvent composed of a lower alkyl alcohol and water to an aromatic solvent solution of a polyphenylene oxide substantially free from impurities to precipitate the polyphenylene oxide, the weight ratio of the aromatic solvent to the lower alkyl alcohol being from 1:1 to 1:2 and the weight ratio of the lower alkyl alcohol to water being from 1:0.005 to 1:0.1 in the precipitation system, and the addition of the non-solvent being controlled such that a liquid composition of the aromatic solvent, the lower alkyl alcohol and water forms a single phase; and recovering the precipitated polyphenylene oxide.

摘要翻译： 从聚苯醚溶液中回收具有高堆积密度和微粒含量降低的聚苯醚的方法，其包括将由低级烷基醇和水组成的非溶剂加入到聚苯醚的芳族溶剂溶液中 基本上不含杂质以沉淀聚苯醚，芳族溶剂与低级烷基醇的重量比为1:1至1:2，低级烷基醇与水的重量比为1:0.005至1:1。 0.1，并且将非溶剂的添加控制为使得芳族溶剂，低级烷基醇和水的液体组合物形成单相; 并回收沉淀的聚苯醚。