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公开(公告)号：US20180080149A1
公开(公告)日：2018-03-22
申请号：US15554309
申请日：2016-03-10
发明人： Akira ITO
摘要： The invention provides an antimicrobial fiber which exhibits excellent antimicrobial properties even without the addition of antimicrobial agents and can remain antimicrobial even after repeated washing. The antimicrobial fiber comprises a fiber having on a surface thereof a polyacetal copolymer (X) containing oxyalkylene groups, the molar amount of oxyalkylene groups in the polyacetal copolymer (X) being 0.2 to 5 mol % relative to the total of the molar amount of oxymethylene groups and the molar amount of oxyalkylene groups.
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公开(公告)号：US20160090445A1
公开(公告)日：2016-03-31
申请号：US14892365
申请日：2014-05-23
发明人： Tomoyuki HIRANO , Akira ITO
IPC分类号： C08G65/16
摘要： A method for the continuous production, at high polymerization yield, of an oxymethylene copolymer having improved thermal stability and formaldehyde emission, while maintaining toughness and rigidity, is provided. Provided is a production method for oxymethylene copolymer, including: a step of carrying out a copolymerization reaction of trioxane and 1,3-dioxolane in an amount of 0.9-2.4 mass % with respect to the trioxane, in the presence of 0.001-0.007 mol % of boron trifluoride and 0.006-2.0 mass % of a sterically hindered phenol with respect to the trioxane; and a step of adding a polymerization terminator to the reaction system at the point in time that the polymerization yield of the copolymerization reaction has reached 92% or above, to terminate polymerization.
摘要翻译： 提供了在保持韧性和刚性的同时，以高聚合产率连续生产具有改进的热稳定性和甲醛释放的甲醛共聚物的方法。 本发明提供了一种甲醛共聚物的制造方法，其特征在于，包括：在0.001-0.007摩尔的存在下，相对于三恶烷，以0.9-2.4质量％的量进行三恶烷和1,3-二氧戊环的共聚反应的工序 三氟化硼的百分比和0.006-2.0质量％的空间位阻酚相对于三恶烷; 以及在共聚反应的聚合收率达到92％以上的时间点向反应体系中加入聚合终止剂以终止聚合的步骤。
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公开(公告)号：US20200002853A1
公开(公告)日：2020-01-02
申请号：US16567779
申请日：2019-09-11
发明人： Akira ITO
摘要： The invention provides an antimicrobial fiber which exhibits excellent antimicrobial properties even without the addition of antimicrobial agents and can remain antimicrobial even after repeated washing. The antimicrobial fiber comprises a fiber having on a surface thereof a polyacetal copolymer (X) containing oxyalkylene groups, the molar amount of oxyalkylene groups in the polyacetal copolymer (X) being 0.2 to 5 mol % relative to the total of the molar amount of oxymethylene groups and the molar amount of oxyalkylene groups.
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公开(公告)号：US20180179670A1
公开(公告)日：2018-06-28
申请号：US15759371
申请日：2016-09-07
发明人： Akira ITO , Daisuke SUNAGA , Kohsuke TOGASHI
CPC分类号： D01F6/66 , D01F6/78 , D01F8/16 , D03D15/00 , D04B1/16 , D06M15/39 , D06M2101/20 , D06M2101/24 , D06M2101/32 , D10B2401/02 , D10B2501/00 , D10B2503/06 , D10B2505/12
摘要： A cloth containing a fiber having on a surface a polyacetal copolymer containing a prescribed amount of oxyalkylene unit(s), wherein the cloth exhibits a qmax value of at least 0.2 W/cm2, when the cloth is brought into contact with a heat storing plate of 40° C. under a contact pressure of 0.098 N/cm2 in an environment at a temperature of 20° C. and at a relative humidity of 65%, is superior in contact cold sensation, colorfastness, quick drying property and gloss.
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公开(公告)号：US20160145384A1
公开(公告)日：2016-05-26
申请号：US14904552
申请日：2014-05-23
发明人： Tomoyuki HIRANO , Akira ITO
IPC分类号： C08G65/26
摘要： Provided is a method for producing an oxymethylene copolymer continuously and with high polymerization yield, whereby it becomes possible to improve heat stability and the formaldehyde generation amount while keeping MD resistance and folding endurance. Provided is a method for producing an oxymethylene copolymer, which comprises the steps of: carrying out a copolymerization reaction of a monomer raw material comprising trioxane and 1,3-dioxolane in an amount of 7.0 to 22 mass % relative to the amount of trioxane in the presence of boron trifluoride in an amount of 0.03 to 0.10 mmol relative to 1 mol of trioxane and sterically hindered phenol in an amount of 0.006 to 2.0 mass % relative to the amount of trioxane; and adding a polymerization terminator to a reaction system at the point of time at which the polymerization yield of the copolymer becomes 92% or more to terminate the polymerization.
摘要翻译： 提供了一种连续地生产甲醛共聚物并且具有高聚合产率的方法，从而可以在保持MD抗性和耐折性的同时提高热稳定性和甲醛生成量。 提供一种甲醛共聚物的制造方法，其包括以下步骤：相对于三恶烷的量，相对于三恶烷的量，进行包含三恶烷和1,3-二氧戊环的单体原料的共聚反应，其量为7.0〜22质量％ 相对于三恶烷的量，相对于1摩尔三恶烷和空间位阻酚为0.03〜0.10摩尔的三氟化硼的存在量为0.006〜2.0质量％ 并在共聚物的聚合产率达到92％以上的时间点向反应体系中加入聚合终止剂以终止聚合。
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公开(公告)号：US20200216598A1
公开(公告)日：2020-07-09
申请号：US16084083
申请日：2017-03-13
摘要： The present invention is to provide a process for producing an oxymethylene copolymer, in which deteriorate due to oxidation hardly occurs, an amount of formaldehyde generated from the product when stored for a long time under environment of high temperature and high humidity is reduced, and occurrence of mold deposit during molding is small. A process for producing an oxymethylene copolymer includes Step 1 of polymerizing polymer raw materials containing trioxane and a comonomer in the presence of a specific amount of an acid catalyst, Step 2 of adding a hydroxylamine compound represented by the following general formula (1): to a product obtained in the Step 1 in an amount of 1 to 20-fold mol based on an amount of the acid catalyst and mixing these, and Step 3 of further melting and kneading a mixture of the product and the hydroxylamine compound obtained in the Step 2.
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公开(公告)号：US20200181806A1
公开(公告)日：2020-06-11
申请号：US16619659
申请日：2018-06-08
发明人： Akira ITO , Daisuke SUNAGA , Sunao MIKAMI
摘要： The present invention provides a method for manufacturing a polyacetal fiber in which whiteness irregularity is improved. One embodiment of the present invention provides a method for manufacturing a polyacetal fiber, wherein the method includes a discharge step, a takeup step, a stretching step, and a winding step, the steps being continuously performed, an oxymethylene copolymer being used as the raw material of the polyacetal fiber, the oxymethylene copolymer having an oxymethylene unit and an oxyethylene unit, the content of the oxyethylene unit being 0.5-7.0 moles to 100 moles of the oxymethylene unit, the roller temperature of a stretching unit used in the stretching step being 130-155° C., and operation parameters of the method being set so as to satisfy a prescribed numerical formula.
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公开(公告)号：US20180266018A1
公开(公告)日：2018-09-20
申请号：US15759377
申请日：2016-09-07
发明人： Akira ITO , Daisuke SUNAGA
CPC分类号： D01F6/66 , C08L59/04 , D01F8/16 , D03D15/0044 , D10B2321/06
摘要： A fiber having on a surface a polyacetal copolymer containing a prescribed amount of oxyalkylene unit(s), wherein a cloth comprising the fiber has a heat retention rate of not more than 10%, as measured in accordance with JIS L 1096 A method, is superior in contact cold sensation.
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公开(公告)号：US20180118885A1
公开(公告)日：2018-05-03
申请号：US15858399
申请日：2017-12-29
发明人： Yumi OKUI , Daisuke KOBAYASHI , Akira ITO
IPC分类号： C08G65/16 , C08L59/04 , C08G2/24 , C07D323/06 , C08G2/10
CPC分类号： C08G65/16 , C07D323/06 , C08G2/10 , C08G2/24 , C08L59/04
摘要： The present invention provides a trioxane composition which comprises trioxane as a main component, an antioxidant, and at least one alkaline organic compound selected from the group consisting of an amine compound having an alcoholic hydroxy group in the molecule thereof, a thiocarbamate compound, and an organophosphorus compound, wherein the amount of the alkaline organic compound contained is 0.01 to 10 ppm, based on the trioxane, and wherein the trioxane composition is a liquid.
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公开(公告)号：US20170327682A1
公开(公告)日：2017-11-16
申请号：US15531568
申请日：2015-12-15
发明人： Yumi OKUI , Daisuke KOBAYASHI , Akira ITO , Daisuke SUNAGA , Yupin PATTAMAMONGKOLCHAI , Sanit PALAHARN
IPC分类号： C08L59/04 , C08K3/22 , C08K5/3435
CPC分类号： C08L59/04 , C08K3/22 , C08K5/17 , C08K5/3435 , C08K2003/2296 , C08L77/00 , C08L2201/08
摘要： The present invention provides a polyacetal resin composition comprising (A) a polyacetal resin and (B) zinc oxide, wherein the content of oxyalkylene constituent units other than an oxymethylene group in the polyacetal resin (A) is 0.1% by mass or more, and wherein the total surface area of the zinc oxide (B) in the polyacetal resin composition is 0.1 to 40 m2 per 100 g of the polyacetal resin (A); as well as an article molded therefrom.
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