公开(公告)号：US09546241B2

公开(公告)日：2017-01-17

申请号：US14786249

申请日：2014-04-04

Applicant: Polyplastics Co., Ltd.

Inventor： Tomohiro Monma ,  Eiji Masuda ,  Shoji Sanada

IPC: C08G2/24 ,  C08G2/10 ,  C08G2/06 ,  C08G2/22 ,  C08G4/00 ,  C08L59/04 ,  C08G2/12

CPC classification number: C08G2/24 ,  C08G2/06 ,  C08G2/10 ,  C08G2/22 ,  C08G4/00 ,  C08L59/04

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。

公开(公告)号：US12037487B2

公开(公告)日：2024-07-16

申请号：US18030572

申请日：2021-09-27

Applicant: POLYPLASTICS CO., LTD.

Inventor： Yuuki Kanda ,  Tomohiro Monma ,  Hiroki Arai

IPC: C08L59/04 ,  C08K3/04 ,  C08K3/22 ,  C08K5/13 ,  C08L71/02

CPC classification number: C08L59/04 ,  C08K3/041 ,  C08K3/22 ,  C08K5/13 ,  C08L71/02 ,  C08K2003/222 ,  C08K2003/2296 ,  C08K2201/001 ,  C08K2201/003 ,  C08K2201/006 ,  C08K2201/011 ,  C08K2201/014

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.

公开(公告)号：US20230374288A1

公开(公告)日：2023-11-23

申请号：US18030582

申请日：2021-09-10

Applicant: Polyplastics Co., Ltd.

Inventor： Yuuki Kanda ,  Tomohiro Monma ,  Hiroki Arai

IPC: C08L59/00 ,  C08K3/04 ,  C08K7/18 ,  C08K5/00

CPC classification number: C08L59/00 ,  C08K3/04 ,  C08K7/18 ,  C08K5/005 ,  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.

公开(公告)号：US11634576B2

公开(公告)日：2023-04-25

申请号：US17051919

申请日：2019-04-24

Applicant: Polyplastics Co., Ltd.

Inventor： Hiroki Arai ,  Tomohiro Monma

IPC: C08L59/04 ,  C08K3/22 ,  C08K5/00 ,  C08K5/13 ,  C08L71/02 ,  F02M59/44

Abstract: A polyacetal resin composition capable of minimizing degradation when a molded body thereof comes into contact with an acidic cleaner. The polyacetal resin composition contains with respect to (A) 100 parts by mass of a polyacetal copolymer in which the amount of a hemiformal end group is 0.8 mmol/kg or less, (B) more than 1.0 parts by mass and at most 5.0 parts by mass of a hindered phenol-based antioxidant, and (C) more than 4.0 parts by mass and at most 30 parts by mass of magnesium oxide.

公开(公告)号：US10174270B1

公开(公告)日：2019-01-08

申请号：US15718390

申请日：2017-09-28

Applicant: POLYPLASTICS CO., LTD.

Inventor： Yuki Kanda ,  Tomohiro Monma ,  Takanori Ueda

IPC: F16C33/20 ,  C10M107/50 ,  C10M107/06 ,  C08L59/00 ,  E05D15/16 ,  E05F11/38

Abstract: A method for producing a dust-resistant sliding member, the method including a step of preparing a resin composition containing 0.5 to 5.0 parts by mass of a specific lubricant that is liquid at 25° C., 0.1 to 30 parts by mass of an inorganic filler, 1.0 to 20 parts by mass of a specific modified olefin-based polymer, and 0.01 to 5.0 parts by mass of an alkylene glycol-based polymer having a primary or secondary amino group, per 100 parts by mass of a polyacetal copolymer containing oxyalkylene units in a ratio of 0.4 to 0.9 mol % relative to all of the structural units; and a step of molding the resin composition into a prescribed shape.

公开(公告)号：US20180282650A1

公开(公告)日：2018-10-04

申请号：US15475522

申请日：2017-03-31

Applicant: Polyplastics Co., Ltd.

Inventor： Yuki Kanda ,  Tomohiro Monma ,  Takanori Ueda

IPC: C10M107/50 ,  C08L59/04 ,  C10M107/06 ,  C10M125/30 ,  C10M125/28 ,  C10M107/34 ,  B60J1/16

Abstract: A method for producing a dust-resistant sliding member, the method including a step of preparing a resin composition containing 0.5 to 5.0 parts by mass of a lubricant that is liquid at 25° C. and is composed of at least one material selected from the group consisting of ethylene/α-olefin copolymers, poly-α-olefins and silicones, and 0.1 to 30 parts by mass of an inorganic filler, per 100 parts by mass of a polyacetal resin, and a step of molding the resin composition into a prescribed shape.