| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Production of trioxane polymer or copolymer | JP10250083 | 1983-06-08 | JPS59227916A | 1984-12-21 | KASUGA TAKUZOU; ASANO TAKESHI; IKENAGA MASAO; YAMAWAKI MASAMI; TAKEDA YASUYUKI; ICHIMURA KOUICHI |
| PURPOSE: To obtain the titled polymer of a uniform quality in high yields, by preventing undesirable side reactions and decomposition in processing steps subsequent to the polymerization step, by polymerizing trioxane in the presence of a sterically hindered phenol previously added to the monomer. CONSTITUTION: In the (co)polymerization of trioxane in the presence of a cation- active catalyst, 0.001W2.0wt%, based on the monomer, sterically hindered phenol [e.g., hexamethylene glycol bis(3,5-di-t-butyl-4-hydroxyhydrocinnamate)] is added to the monomer before polymerization, and the monomer is (co)polymerized. Adverse effects of side reactions such as lowering in yields due to depolymerization during polymerization and lowering in MW due to cleavage of main chains can be prevented, and decomposition during processing steps subsequent to polymerization, such as removal of unrecated monomers by heating, removal of monomers by washing, and drying can also be prevented, so that a (co)polymer of a uniform quality can be obtained in high yields. COPYRIGHT: (C)1984,JPO&Japio | ||||||
| 182 | JPS5850616B2 - | JP5085777 | 1977-05-04 | JPS5850616B2 | 1983-11-11 | GYUNTERU ZETSUKUSUTOROO; KARURUHAINTSU BURUKU; HERUMUUTO SHURAAFU; HANSU DEIITERU ZAABERU; ARUIN HERURERU |
| 183 | JPS5811450B2 - | JP16368680 | 1980-11-20 | JPS5811450B2 | 1983-03-03 | AMAMYA AKIRA; KUNII TADASHI; FURUSAWA TOMONORI; TAKEDA MUTSUHIKO; TANAKA KATSUMASA; UMEMURA TOSHIKAZU; ONO YOSHIHIRO; MASUMOTO ISAMU; NAKAO NORYASU; FURUKAWA MASANORI |
| 184 | JPS5744690B2 - | JP14232476 | 1976-11-29 | JPS5744690B2 | 1982-09-22 | |
| 185 | Thermal stabilization of oxymethylene copolymer | JP16368680 | 1980-11-20 | JPS5787410A | 1982-05-31 | AMAMIYA AKIRA; KUNII TADASHI; FURUSAWA TOMONORI; TAKEDA MUTSUHIKO; TANAKA KATSUMASA; UMEMURA TOSHIKAZU; ONO YOSHIHIRO; MASUMOTO ISAMU; NAKAO NORIYASU; FURUKAWA MASANORI |
| PURPOSE: To prepare the titled copolymer having excellent thermal stability, in an industrial scale, by heating and melting crude oxymethylene copolymer in the presence of a thermal stabilizer with a degassing apparatus comprising a combination of an extruder and a surface renewal-type mixer, thereby effecting the degassing of the copolymer. CONSTITUTION: A crude oxymethylene copolymer derived from trioxane and cyclic acetal or cyclic ether, is added with a thermal stabilizer, and heated and molten with a degassing apparatus comprising a combination of a screw-type extruder A and a surface renewal-type mixer B to decompose and remove the unstable part of the copolymer and to stabilize the copolymer. The extruder A is those having one or more screws, the decomposition rate of the unstable part of 30W90wt%, and the residence time of 0.5W2min. The mixer B is those having ratating shafts 1, 1', scraping blades 2, outlet 4, degassing opening 6, auxiliary blade 7, and releasing opening 8 of the molten polymer, and satisfying the surface renewal effect of 1W50cm 2/cm 3.min defined by the formula N.As/H (N is rotating speed of the stirring shaft; As is surface area of the reaction zone; H is charged amount to the reaction zone). COPYRIGHT: (C)1982,JPO&Japio | ||||||
| 186 | Continuous polymerization of trioxane | JP13586879 | 1979-10-23 | JPS5659824A | 1981-05-23 | SUGIO AKITOSHI; KOU KAZUYOSHI; AMAMIYA AKIRA; FURUSAWA TOMONOBU; TAKEDA MUTSUHIKO; TANAKA KATSUMASA; UMEMURA TOSHIKAZU; ONO YOSHIHIRO |
| PURPOSE: To continuously polymerize trioxane stably and efficiently, by employing a continuously agitated reactor in which a plurality of pairs of paddles are provided in an axial direction and the reaction mixture is transferred in a specified manner. CONSTITUTION: A reactor is constructed by (A) providing shafts 1 and 1' in the centers of drums 2 and 2' which are arranged parallel so that they overlap partially with each other, (B) mounting on the shafts 1 and 1' in the longitudinal direction, a plurality of pairs of convex lens-shaped paddles 4 and 4' (these paddles are synchronized so that they rotate while maintaining a slight clearance between a tip of one paddle and the side of another paddle and a clearance between a tip of one paddle and the inner wall of the drum 2) and (C) varying the shape and arrangement of the paddles, so that the transfer efficiency of the reaction mixture decreases gradually with the advancement of the reaction mixture from a material inlet port 5 to a product discharge port 6. The clearance between the tip of a paddle 4 or 4' and the drum 2 is preferably below about 2% of the diameter of the external circle of the paddle, and the clearance between the tip of one paddle and the side of another paddle is preferably below about 5 times the above clearance. COPYRIGHT: (C)1981,JPO&Japio | ||||||
| 187 | JPS5523855B2 - | JP15621277 | 1977-12-24 | JPS5523855B2 | 1980-06-25 | |
| 188 | JPS5510611B2 - | JP420673 | 1972-12-26 | JPS5510611B2 | 1980-03-18 | |
| 189 | Method of mixing polymerizable materials and device therefor | JP7030778 | 1978-06-13 | JPS54161695A | 1979-12-21 | SUGIO AKITOSHI; AMAMIYA AKIRA; KUNII TADASHI; FURUSAWA TOMONORI; TAKEDA MUTSUHIKO; TANAKA KATSUMASA; UMEMURA TOSHIKAZU; KAWAGUCHI SEIICHI |
| PURPOSE: To eliminate the clogging of catalyst nozzle tips and to mix polymerization raw materials continuously and quantitatively, by mixing a comonomer from one nozzle with a polymerization catalyst from the other nozzle while washing the nozzles with trioxane. CONSTITUTION: The feed nozzle 3 for a comonomer which is a cyclic ether or acetal, and the feed nozzle 5 for a catalyst are opened with tips 4 and 6 in contact. The comonomer and the polymerization catalyst are fed and brought into contact with each other, mixed with trioxane from the flow path 2 homogeneously while passing through the orifice 7, slowed down a little at the bottom of the mixing chamber 8, and fed to the reactor 10 slowly. Preferably, the trioxane flow at the tip of the nozzles 3 and 5 and the flow of the reaction mixture after the nozzles are set at linear velocities ≥ 20 cm/sec. COPYRIGHT: (C)1979,JPO&Japio | ||||||
| 190 | Polymerization of trioxane | JP15621277 | 1977-12-24 | JPS5487792A | 1979-07-12 | SUGIO AKITOSHI; AMAMIYA AKIRA; ABE TETSUYA; FURUSAWA TOMONORI; SUZUMORI TAKEO; TAKEDA MUTSUHIKO; KIMURA MASAHARU; OOTSUKI RIYOUJI; TANAKA KATSUMASA; UMEMURA TOSHIKAZU; KAWAGUCHI SEIICHI; OOBA MICHIO |
| PURPOSE: To prepare a high molecular weight oxymethylene (co)polymer by melting and (co)polymerizing trioxane crystals obtained by removing polyoxymethylene dimethoxide from crude trioxane by crystallization. CONSTITUTION: An aqueous solution of formaldehyde containing 20W95 wt.% of formaldehyde and 0.1W20 wt.% of methanol is distilled in the presence of an acid catalyst, and the distilled out vapor is introduced into a scrubber and brought into contact with a solvent which is insoluble or hardly soluble to water. Trioxane is recovered as a solution of the solvent from the bottom of the scrubber. The solvent is distilled off from the solution leaving a crude trioxane containing 1000W15000 ppm of polyoxymethylene dioxide. The crude trioxane is cooled to ≤64°C in open air or in an inert atmosphere, crystallized trioxane is separated from polyoxymethylene dioxide, and is remelted to be used as a raw material of the oxymethylene (co)polymer. COPYRIGHT: (C)1979,JPO&Japio | ||||||
| 191 | Acetalcarboxlate compound in polymer form | JP10225678 | 1978-08-21 | JPS5452196A | 1979-04-24 | MAABIN MATSUKU KURATSUCHIFUIIR; BIKUTAA DENISU PAPANU; KUREIGU BISHIYOTSUPU UOOREN |
| 192 | Continuous polymerization | JP14232476 | 1976-11-29 | JPS5386794A | 1978-07-31 | SUGIO AKITOSHI; FURUSAWA TOMONORI; TANAKA KATSUMASA; UMEMURA TOSHIKAZU; URABE HIROYUKI |
| PURPOSE: The polymerization reaction of trioxane is divided into two stages depending on the trioxane conversion and conducted by use of polymerizers suited to each stage, thereby high molecular weight polyoxymethylene is produced in high conversion. COPYRIGHT: (C)1978,JPO&Japio | ||||||
| 193 | Method of preparing oxymethylene polymer | JP10327276 | 1976-08-31 | JPS5229889A | 1977-03-07 | KARURUHAINTSU BURUKU |
| 194 | JPS4824497B1 - | JP1185270 | 1970-02-10 | JPS4824497B1 | 1973-07-21 | |
| 195 | PRODUCTION METHOD FOR POLYACETAL COPOLYMER | EP13858778 | 2013-10-25 | EP2927254A4 | 2016-06-29 | MASUDA EIJI; MONMA TOMOHIRO; HORIGUCHI TADAHIRO |
| Provided is a production method for a polyacetal copolymer that makes deactivation of a catalyst simple and efficient and that achieves a high polymerization yield and high quality using equipment that does not require a cleaning step and a process that involves a simple operation technique. The production method for a polyacetal copolymer uses trioxane as a main monomer (a) and a cyclic ether and/or a cyclic formal having at least one carbon-carbon bond as a comonomer (b). In the production method, a predetermined heteropoly acid is used as a polymerization catalyst (c) to perform copolymerization, a predetermined salt (d) is added to the reaction product, melt kneading processing is performed, and the polymerization catalyst (c) is deactivated. It is preferable that the heteropoly acid be selected from among phosphomolybdic acid, phosphotungstic acid, and the like. It is preferable that the salt (d) be selected from among sodium carbonate, sodium bicarbonate, sodium formate, and the like. | ||||||
| 196 | VERFAHREN ZUR AUFARBEITUNG VON PARTIKELFÖRMIGEM ROHPOLYOXYMETHYLEN | EP12740169.3 | 2012-07-27 | EP2742077B1 | 2016-03-23 | DEININGER, Jürgen; DEMETER, Jürgen; HÄFFNER, Rüdiger; SCHULZ, Ralf; STAMMER, Achim |
| 197 | VERFAHREN ZUR AUFARBEITUNG VON PARTIKELFÖRMIGEM ROHPOLYOXYMETHYLEN | EP12740169.3 | 2012-07-27 | EP2742077A2 | 2014-06-18 | DEININGER, Jürgen; DEMETER, Jürgen; HÄFFNER, Rüdiger; SCHULZ, Ralf; STAMMER, Achim |
| The invention relates to a method for processing particulate raw polyoxymethylene, comprising the following steps: (a) adding the particulate raw polyoxymethylene to an extraction column (13), wherein the extraction column (13) is operated at a pressure in the range from 1 to 6 bar; (b) adding a polar extracting agent to the extraction column (13) at a temperature in the range from 95 to 140 °C and a pressure in the range from 1 to 6 bar, wherein 10 to 1000 ppm, in relation to the added quantity of polar extracting agent, of a buffer substance that buffers in the pH range from 7.5 to 11.5 is added to the extraction column. | ||||||
| 198 | VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLEN-HOMO- UND -COPOLYMEREN UND DAFÜR GEEIGNETE VORRICHTUNG | EP06724093.7 | 2006-04-06 | EP1869096B1 | 2009-08-26 | HOFFMOCKEL, Michael; KRAMER, Matthias; MUECK, Karl-Friedrich; ROESCHERT, Horst |
| The invention relates to a device for producing homopolymers and copolymers of polyoxymethylene. Said device comprises the following elements: A) a reactor (1) having a polymerization zone (2) and a directly adjacent deactivation zone (2) for the polymerization and deactivation of homopolymers and copolymers of polyoxymethylene in a homogeneous phase in a manner known per se, B) a relief unit (4) which optionally comprises a metering device (5) for additives to be added to the polymer, C) a granulator (6), D) an extraction device (7), and E) optionally a drying device (8). The inventive device and the polymerization method carried out therewith allow to achieve especially low residual monomer contents in a simple and power-saving manner. | ||||||
| 199 | PROCESS FOR PRODUCING A POLYACETAL COPOLYMER | EP00978071.9 | 2000-12-01 | EP1270629B1 | 2009-07-22 | OKAWA, Hidetoshi, c/o Polyplastics Co. Ltd.; YAMAMOTO, Kaoru, c/o Polyplastics Co. Ltd. |
| A resin material which has improved rigidity while retaining excellent properties inherent in a polyacetal resin, such as appearance, sliding properties, and thermal stability. The polyacetal copolymer is obtained by copolymerizing (A) 100 parts by weight of trioxane with (B) 0.0005 to 2 parts by weight of (B-1) a compound having three or more glycidyl groups per molecule or (B-2) a compound having two or more epoxy groups per molecule and (C) 0 to 20 parts by weight of a cyclic ether compound copolymerizable with trioxane, and has a total terminal group content of 15 to 150 mmol/kg when the ingredient (B) was the compound (B-2). | ||||||
| 200 | VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENEN | EP01903689.6 | 2001-02-02 | EP1259557B1 | 2005-05-04 | MOURS, Marian; ANDERLIK, Rainer; EGBERS, Gitta; KIRSCHEY, Michael; ROOS, Martin |
| The invention relates to a continuous method for production of polyoxymethylene homo- or co-polymer by mass polymerisation of the monomers in the presence of cationic-effect initiators and, optionally, in the presence of regulators. During the polymerisation, both monomers and polymer are in the molten form, the polymer is then deactivated, the melt withdrawn, cooled and granulated. The invention is characterised in that the polymer is withdrawn, cooled and granulated under elevated pressure and in the presence of a liquid. | ||||||
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