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公开(公告)号：US20160122459A1
公开(公告)日：2016-05-05
申请号：US14786249
申请日：2014-04-04
Applicant: POLYPLASTICS CO., LTD.
Inventor： Tomohiro MONMA , Eiji MASUDA , Shoji SANADA
IPC: C08G2/24
Abstract: A high-quality polyacetal copolymer produced by a simple process in an economical manner. The process includes supplying a raw material including trioxane and the like to a reaction device; setting the polymerization environmental temperature to no more than 100° C. until the reaction device conversion rate becomes 0.5, and then carrying out further polymerization; vaporizing and separating unreacted monomers from the reaction mixture at an environmental temperature of at least 115° C. and less than 140° C.; supplying the separated monomers to the raw material supply; and recovering the polyacetal copolymer from the reaction mixture.
Abstract translation: 以经济的方式通过简单的方法生产的高品质聚缩醛共聚物。 该方法包括向反应装置供应包括三恶烷等的原料; 将聚合环境温度设定在不超过100℃，直到反应装置转化率达到0.5，然后进行进一步的聚合; 在至少115℃且小于140℃的环境温度下从反应混合物中蒸发和分离未反应的单体; 将分离的单体供应给原料供应; 并从反应混合物中回收聚缩醛共聚物。
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公开(公告)号：US20200172699A1
公开(公告)日：2020-06-04
申请号：US16487679
申请日：2018-02-23
Applicant: Polyplastics Co., Ltd.
Inventor： Hiroki ARAI , Tomohiro MONMA
Abstract: The present invention addresses the problem of providing a polyacetal resin composition which can minimize degradation of a molded product produced from the acetal resin composition, when the molded product is in contact with an acidic cleaner. Said problem is solved by a polyacetal resin composition, comprising: polyacetal copolymer (A) in an amount of 100 parts by mass, wherein said polyacetal copolymer (A) has a hemiformal terminal group content of 0.8 mmol/kg or less; hindered phenol-based antioxidant (B) in an amount of 0.1 to 1.0 part by mass; and at least one selected from an oxide of magnesium or zinc or a hydroxide of magnesium or zinc (C) in an amount more than 2.0 parts by mass and 30 parts by mass or less.
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公开(公告)号：US20180171104A1
公开(公告)日：2018-06-21
申请号：US15575999
申请日：2016-03-02
Applicant: Polyplastics Co., Ltd.
Inventor： Tomohiro MONMA , Hatsuhiko HARASHINA , Tomoyuki TADA
CPC classification number: C08K5/134 , C08K5/09 , C08K5/092 , C08K5/098 , C08K5/1345 , C08K2201/012 , C08L59/00 , C08L59/04
Abstract: A polyacetal resin composition containing 100 parts by weight of a polyacetal resin; from 0.01 part by weight to 0.5 part by weight (inclusive) of a hindered phenolic antioxidant; from 0.002 part by weight to 0.02 part by weight (inclusive) of an aliphatic carboxylic acid containing 2 or more carboxyl groups and having 4 or more carbon atoms; and from 0.01 part by weight to 0.1 part by weight (inclusive) of a fatty acid calcium salt. The molar ratio of the fatty acid calcium salt to the aliphatic carboxylic acid may be from 0.5 to 5 (inclusive).
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公开(公告)号：US20220227989A1
公开(公告)日：2022-07-21
申请号：US17595350
申请日：2020-04-10
Applicant: Polyplastics Co., Ltd.
Inventor： Kazuyuki HATTORI , Tomohiro MONMA
Abstract: A polyacetal resin composition and a sliding member, the polyacetal resin composition having excellent performance with respect to friction/abrasion characteristics while maintaining good appearance of a molded article thereof or low occurrence of mold contamination during molding. The polyacetal resin composition contains at least (A) 100 parts by mass of a polyacetal resin, (B) 0.01 part by mass to 1 part by mass of a hindered-phenol-based antioxidant, (C) 0.3 part by mass to 5 parts by mass of silicone oil, (D) 0.1 part by mass to 1.0 part by mass of calcium carbonate, and (E) 0.02 part by mass to 0.2 part by mass of a fatty acid, the calcium carbonate (D) is precipitated calcium carbonate which is not surface-treated and which has an average particle diameter of 1μm or less, and the fatty acid (E) is a C12-30 fatty acid.
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公开(公告)号：US20210355314A1
公开(公告)日：2021-11-18
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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Patent Agency Ranking
公开(公告)号：US20230331978A1
公开(公告)日：2023-10-19
申请号：US18338790
申请日：2023-06-21
Applicant: Polyplastics Co., Ltd.
Inventor： Yuhei HOSOI , Akihiro TAMAOKA , Hiroki ARAI , Tomohiro MONMA
CPC classification number: C08L59/04 , C08K3/22 , C08K5/13 , C08K5/17 , C08K5/20 , C08K5/3472 , C08L71/02 , C08K2003/222 , C08K2003/2296 , C08K2201/006 , C08K2201/014
Abstract: A polyacetal resin composition that allows molded articles to be inhibited from being deteriorated by contact with acidic detergents, and in which the portions that have contacted the detergents are inhibited from being deteriorated by light. The polyacetal resin composition includes 100 parts by mass of a polyacetal polymer, 0.1-2.0 parts by mass of a hindered-phenol-based antioxidant, 2.0-20 parts, excluding 2.0 parts, by mass of at least one of magnesium oxide and zinc oxide,0.5-3.0 parts by mass of a polyalkylene glycol, 0.2-1.5 parts by mass of a hindered amine compound, and 0.2-1.5 parts by mass of an ultraviolet absorber.
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公开(公告)号：US20190241732A1
公开(公告)日：2019-08-08
申请号：US15777082
申请日：2016-11-04
Applicant: Polyplastics Co., Ltd.
Inventor： Tomohiro MONMA
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：US20160075815A1
公开(公告)日：2016-03-17
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：US20220275196A1
公开(公告)日：2022-09-01
申请号：US17637624
申请日：2020-06-09
Applicant: Polyplastics Co., Ltd.
Inventor： Hatsuhiko HARASHINA , Tomohiro MONMA , Akihiro TAMAOKA
IPC: C08L59/00
Abstract: An automobile interior component obtained using a specific polyacetal resin composition which allows for stable suppression of the generation of mold deposits during molding at elevated temperatures, and the reduction of the amount of formaldehyde generated from a molded article to an extremely low level, as well as the prevention of the bleed-out of an added component from the molded article, and the retention of a favorable appearance of the molded article. The automobile interior component is obtained using a polyacetal resin composition containing, at least 100 parts by mass of a polyacetal polymer (A); 0.03 to 0.30 parts by mass of a hindered phenol antioxidant (B); 0.01 to 0.50 parts by mass of an aliphatic carboxylic acid hydrazide (C); 0.001 to 0.50 parts by mass of a hydantoin compound having two hydrazinocarbonylalkyl groups (D); and 0.001 to 0.30 parts by mass of an alkaline earth metal salt of an aliphatic carboxylic acid (E), and the total amount of the components (C) and (D) is 0.03 to 0.55 parts by mass with respect to 100 parts by mass of the polyacetal polymer (A).
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公开(公告)号：US20220089858A1
公开(公告)日：2022-03-24
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
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 wherein 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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