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

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

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.

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.

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

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

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.

公开(公告)号：US20230250255A1

公开(公告)日：2023-08-10

申请号：US18014894

申请日：2021-06-14

Applicant: Polyplastics Co., Ltd.

Inventor： Yuuki Kanda ,  Hidekazu Idei

IPC: C08K3/04 ,  C08L29/14 ,  C08L81/04 ,  C08G63/183 ,  B29C48/40 ,  B29C48/00 ,  B29C45/00

CPC classification number: C08K3/041 ,  B29C45/0001 ,  B29C48/022 ,  B29C48/40 ,  C08G63/183 ,  C08L29/14 ,  C08L81/04 ,  B29K2059/00 ,  C08K2201/011 ,  C08L2203/30 ,  C08L2205/24

Abstract: Provided is a thermoplastic resin composition obtained by melt-kneading at least 0.1 to 0.5 parts by mass of a carbon nanostructure relative to 100 parts by mass of a thermoplastic resin; a member formed by molding the thermoplastic resin composition; a method of manufacturing a member including steps of preparing the thermoplastic resin composition, and molding the thermoplastic resin composition into a predetermined shape; and a method of enhancing mechanical strength of a member formed from a thermoplastic resin composition by using a resin composition obtained by melt-kneading 0.1 to 0.5 parts by mass of a carbon nanostructure relative to 100 parts by mass of a thermoplastic resin.

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.