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公开(公告)号：US11891504B2
公开(公告)日：2024-02-06
申请号：US18030582
申请日：2021-09-10
Applicant: Polyplastics Co., Ltd.
Inventor： Yuuki Kanda , Tomohiro Monma , Hiroki Arai
CPC classification number: C08L59/00 , C08K3/04 , C08K5/005 , C08K7/18 , C08K2201/003
Abstract: A polyacetal resin composition contains a polyacetal copolymer (A) in an amount of 100 parts by mass, the polyacetal copolymer resin having a hemiformal terminal group amount of 0.8 mmol/kg or less, an antioxidant (B) in an amount of 0.5 to 3.0 parts by mass, at least one of zinc oxide or magnesium oxide (C) having an average particle diameter of 5 μm or less in an amount of more than 2.0 parts by mass and 12 parts by mass or less, carbon black (D) having a BET specific surface area of 300 to 400 m2/g in an amount of 5.0 to 16 parts by mass, and polyalkylene glycol (E) in an amount of 0.5 to 3.0 parts by mass.
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公开(公告)号：US11661511B2
公开(公告)日：2023-05-30
申请号：US17593231
申请日：2020-03-10
Applicant: Polyplastics Co., Ltd.
Inventor： Akihiro Tamaoka , Hatsuhiko Harashina , Tomohiro Monma
IPC: C08L59/00 , C08K5/098 , C08K5/25 , C08K5/3445
CPC classification number: C08L59/00 , C08K5/098 , C08K5/25 , C08K5/3445 , C08L2201/08 , C08L2203/30
Abstract: A method for producing a polyacetal resin composition which allows for suppression of formaldehyde generation from a molded article to an extremely low level, and stable suppression of mold deposits during molding. The polyacetal resin composition contains: 100 parts by mass of a polyacetal polymer (A); 0.01 to 0.50 parts by mass of an aliphatic carboxylic acid hydrazide (B); 0.001 to 0.50 parts by mass of a hydantoin compound having two hydrazinocarbonylalkyl groups (C); and 0.001 to 0.30 parts by mass of an alkaline earth metal salt of aliphatic carboxylic acid (D), wherein the total amount of the components (B) and (C) with respect to 100 parts by mass of the polyacetal polymer (A) is 0.03 to 0.55 parts by mass, and the polyacetal polymer (A) is a polyacetal copolymer obtained by copolymerizing trioxane as a principal monomer (a) with a cyclic ether having at least one carbon-carbon bond as a comonomer (b) using a heteropolyacid represented by general formula (1) as a polymerization catalyst (c) to obtain a reaction product, and subsequently adding a carbonate of an alkali metal element or alkaline earth metal element (d) to the reaction product to deactivate the polymerization catalyst (c).
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公开(公告)号：US09657136B2
公开(公告)日：2017-05-23
申请号：US14442659
申请日：2013-10-25
Applicant: Polyplastics Co., Ltd.
Inventor： Eiji Masuda , Tomohiro Monma , Tadahiro Horiguchi
CPC classification number: C08G65/266 , C08G2/06 , C08G2/10 , C08G2/18 , C08G2/28
Abstract: 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 and a cyclic ether and/or a cyclic formal having at least one carbon-carbon bond as a comonomer. In the production method, a predetermined heteropoly acid is used as a polymerization catalyst to perform copolymerization, a predetermined salt is added to the reaction product, melt kneading processing is performed, and the polymerization catalyst is deactivated.
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公开(公告)号：US20230340179A1
公开(公告)日：2023-10-26
申请号：US18246740
申请日：2021-08-23
Applicant: POLYPLASTICS CO., LTD.
Inventor： Yuuki Kanda , Tomohiro Monma , Eiji Masuda
IPC: C08G2/24
CPC classification number: C08G2/24
Abstract: Provided is a method of manufacturing a polyacetal copolymer including: a step of copolymerizing 100 parts by mass of trioxane (A), 0.05 to 5 parts by mass of a cyclic acetal compound (B), and 0.001 to 1 parts by mass of an aliphatic glycidyl ether compound (C) having a chlorine content of 1 to 500 mass ppm, in the presence of a linear formal compound (D) as a molecular weight regulator, in which in the step, when a total mass (g) of the trioxane (A), the compound (B), and the compound (C) is “a”, a molar number of the linear formal compound (D) is “b”, and total molar numbers of water and methanol contained in the trioxane (A), the compound (B), and the compound (C) are respectively “c” and “d”, setting is performed to satisfy (b+c+d)/a=1.5 to 7 μmol/g.
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公开(公告)号：US10738166B2
公开(公告)日：2020-08-11
申请号：US15027084
申请日：2014-09-09
Applicant: Polyplastics Co., Ltd.
Inventor： Tomohiro Monma , Kazufumi Watanabe , Akihide Shimoda
Abstract: A polyoxymethylene resin composition from which formaldehyde is generated in a reduced amount upon molding, without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer. A hindered phenol-type antioxidant agent and an ethylene-(methacrylic acid) copolymer resin or an ethylene-(acrylic acid) copolymer resin or a salt thereof are melted and kneaded together to produce a polyoxymethylene resin composition without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer for which a polymerization catalyst is deactivated after the completion of copolymerization, and in which the unstable terminal group is not yet stabilized. When the polyoxymethylene resin composition is extrusion-molded, the discoloration of a molded product or the deterioration in properties of the molded product can be prevented for a long period of time. The resulting polyoxymethylene resin composition is suitable for forming an extrusion-molded article.
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Patent Agency Ranking
公开(公告)号：US10577496B2
公开(公告)日：2020-03-03
申请号：US15777082
申请日：2016-11-04
Applicant: Polyplastics Co., Ltd.
Inventor： Tomohiro Monma
IPC: C08L59/04 , C08L23/08 , C08K5/092 , C08K3/20 , C08K3/26 , C08K3/32 , C08K5/098 , C08J3/00 , C08K5/13 , C08L33/02
Abstract: A polyacetal resin composition. An aliphatic polycarboxylic acid having four or more carbons and two or more carboxyl groups and a hindered-phenol antioxidant are incorporated into a polyacetal copolymer obtained by copolymerizing trioxane as a major monomer with a cyclic ether and/or cyclic formal each having at least one carbon-carbon bond as a comonomer using a specific heteropoly acid as a polymerization catalyst, adding, to the resultant reaction product, a compound which is any of the carbonates, hydrogen carbonates, and carboxylates of alkali metal elements or alkaline-earth metal elements, the hydrates of these, and the hydroxides of alkali metal elements or alkaline-earth metal elements, and melt-kneading the mixture to deactivate the polymerization catalyst.
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公开(公告)号：US09550853B2
公开(公告)日：2017-01-24
申请号：US14786246
申请日：2014-04-04
Applicant: Polyplastics Co., Ltd.
Inventor： Tomohiro Monma , Eiji Masuda , Shoji Sanada
Abstract: A high-quality polyacetal copolymer produced by a simple process and in an economical manner. The method includes supplying a raw material including trioxane or the like to a reaction device; obtaining a reaction mixture by carrying out a polymerization reaction of the raw material in the state where the rotating shafts are inclined by 1 to 6° upwards with respect to the horizontal direction H from the introduction opening towards a polyacetal copolymer recovery portion; vaporizing and separating an unreacted monomer from the reaction mixture using a vaporization and separation portion; re-supplying the unreacted monomer to the reaction device; and recovering the polyacetal copolymer from the reaction using a polyacetal copolymer recovery portion.
Abstract translation: 通过简单的工艺和经济的方式生产的高品质聚缩醛共聚物。 该方法包括将三恶烷等的原料供给反应装置; 通过在旋转轴相对于从引入口朝向聚缩醛共聚物回收部的水平方向H向上倾斜1〜6度的状态下进行原料的聚合反应来获得反应混合物; 使用蒸发和分离部分从反应混合物中蒸发和分离未反应的单体; 将未反应的单体再供给到反应装置中; 并使用聚缩醛共聚物回收部分从反应中回收聚缩醛共聚物。
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公开(公告)号：US20160280852A1
公开(公告)日：2016-09-29
申请号：US14442659
申请日：2013-10-25
Applicant: POLYPLASTICS CO., LTD.
Inventor： Eiji Masuda , Tomohiro Monma , Tadahiro Horiguchi
IPC: C08G65/26
CPC classification number: C08G65/266 , C08G2/06 , C08G2/10 , C08G2/18 , C08G2/28
Abstract: 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 and a cyclic ether and/or a cyclic formal having at least one carbon-carbon bond as a comonomer. In the production method, a predetermined heteropoly acid is used as a polymerization catalyst to perform copolymerization, a predetermined salt is added to the reaction product, melt kneading processing is performed, and the polymerization catalyst is deactivated.
Abstract translation: 聚缩醛共聚物的制造方法，其使催化剂失活简单，有效，并且使用不需要清洁步骤的设备和涉及简单操作技术的方法实现高聚合产率和高质量。 聚缩醛共聚物的制造方法使用三恶烷作为主要单体，环状醚和/或具有至少一个碳 - 碳键的环状缩甲醛作为共聚用单体。 在制造方法中，使用预定的杂多酸作为聚合催化剂进行共聚，向反应产物中加入预定的盐，进行熔融混炼处理，聚合催化剂失活。
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公开(公告)号：US20230331977A1
公开(公告)日：2023-10-19
申请号：US18030572
申请日：2021-09-27
Applicant: POLYPLASTICS CO., LTD.
Inventor： Yuuki Kanda , Tomohiro Monma , Hiroki Arai
CPC classification number: C08L59/04 , C08K5/13 , C08K3/22 , C08K3/041 , C08L71/02 , C08K2201/011 , C08K2201/006 , C08K2201/014 , C08K2201/001 , C08K2003/222 , C08K2003/2296 , C08K2201/003
Abstract: A polyacetal resin composition contains a polyacetal copolymer resin (A) in an amount of 100 parts by mass, the polyacetal copolymer resin having a hemiformal terminal group amount of 0.8 mmol/kg or less, a hindered phenol-based antioxidant (B) in an amount of 0.2 to 2.0 parts by mass, at least one of magnesium oxide or zinc oxide (C) in an amount of more than 2.0 parts by mass and 20 parts by mass or less, a carbon-based conductive additive (D) in an amount of 0.3 to 2.5 parts by mass, and polyalkylene glycol (E) in an amount of 0.5 to 3.0 parts by mass, wherein the carbon-based conductive additive (D) is one selected from a group consisting of only a carbon nano-structure (D1) and a combination of the carbon nano-structure (D1) and carbon black (D2) having a BET specific surface area of 300 m2/g or more.
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公开(公告)号：US11555111B2
公开(公告)日：2023-01-17
申请号：US17287312
申请日：2019-12-05
Applicant: Polyplastics Co., Ltd.
Inventor： Akihiro Tamaoka , Hatsuhiko Harashina , Tomohiro Monma
IPC: C08L59/00 , C08K5/098 , C08K5/25 , C08K5/3445
Abstract: A polyacetal resin composition capable of keeping the generation of formaldehyde from a molded article at a very low level and stably keeping mold deposits at a minimum during molding. The polyacetal resin composition includes at least (A) 100 parts by mass of a polyacetal polymer, (B) 0.01-0.50 parts by mass of an aliphatic carboxylic hydrazide, (C) 0.001-0.50 part by mass of a hydantoin compound having two hydrazinocarbonylalkyl groups, and (D) 0.001-0.30 part by mass of an alkaline earth metal salt of an aliphatic carboxylic acid. The total amount of (B) and (C) is 0.03-0.55 part by mass per 100 parts by mass of the (A) polyacetal polymer.
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