公开(公告)号：US20250129192A1

公开(公告)日：2025-04-24

申请号：US18730260

申请日：2023-02-02

Applicant: POLYPLASTICS CO., LTD.

Inventor： Yu MIYAGI ,  Tatsuhiko NAGAO

IPC: C08F232/08 ,  C08F4/659 ,  C08F4/6592 ,  C08F210/14

Abstract: A cyclic olefin copolymer that is a copolymer of a cyclic olefin monomer and an α-olefin having 3 or more and 20 or less carbon atoms, which has excellent tensile strength and breaking strain, and a method for producing the cyclic olefin copolymer. In the copolymer, the amount of structural units derived from the α-olefin is 10 mol % or more and 50 mol % or less relative to the entire structural units, and in the relaxation time T1ρ of a hydrogen nucleus by solid-state NMR measurement for the cyclic olefin copolymer, the average value of the relaxation time corresponding to each hydrogen in the cyclic olefin copolymer is in the range of 4.5 to 5.5 msec, and the difference between the maximum value and the minimum value of the relaxation time is in the range of 1.0 to 3.0 msec.

公开(公告)号：US20250101222A1

公开(公告)日：2025-03-27

申请号：US18729390

申请日：2023-01-06

Applicant: Polyplastics Co., Ltd.

Inventor： Takato Isomura ,  Koki Nagai ,  Kazuya Goshima ,  Hiroki Fukatsu

IPC: C08L67/06 ,  B23K26/70 ,  B23K103/16 ,  C08K3/32 ,  C08K5/29 ,  C08K7/14

Abstract: A resin composition suitable for manufacturing a laser light transmission-side molded article; and a laser light transmission-side molded article are disclosed. A method for improving the laser light transmission properties of a resin composition molded article is also disclosed. The resin composition includes: 100 parts by mass of a polyalkylene terephthalate resin (A); 10-100 parts by mass of a polycarbonate resin (B); 0.1-3 parts by mass of a carbodiimide compound (C); 0-100 parts by mass of an inorganic filler (D); and an inorganic phosphorus compound (E). The method includes blending 0.1-3 parts by mass of a carbodiimide compound (C) in a resin composition including 100 parts by mass of a polyalkylene terephthalate resin (A), 10-100 parts by mass of a polycarbonate resin (B), 0-100 parts by mass of an inorganic filler (D), and an inorganic phosphorus compound (E).

公开(公告)号：US20250019549A1

公开(公告)日：2025-01-16

申请号：US18710824

申请日：2022-11-08

Applicant: Polyplastics Co., Ltd.

Inventor： Akihiro Tamaoka ,  Yoshiaki Taguchi ,  Yasuyuki Fukute

IPC: C09D5/03 ,  B29C64/153 ,  B29K59/00 ,  B29K71/00 ,  B29K105/00 ,  B29K509/02 ,  B33Y10/00 ,  B33Y70/00 ,  C08G65/16 ,  C09D159/04

Abstract: The present invention provides a powdery material for a 3D printer from which a high-density and high-strength three-dimensional shaped object having an excellent appearance can be fabricated, a three-dimensional shaped object obtained by using the same, and a production method therefor. The powdery material (X) for a 3D printer is a powdery material (X) comprising a polyacetal copolymer resin powder (I), wherein a percentage occupied by comonomer units among all constituent units (100 mass %) in the polyacetal copolymer resin is at least 1.0 mass % and at most 6.0 mass %, an average particle diameter of the powder (I) is at least 30 μm and at most 70 μm, and a melt flow rate of the powder (I) measured at a temperature of 190° C. and with a load of 2.16 kg is at least 1.0 g/10 min and at most 8.0 g/10 min.

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：US11795256B2

公开(公告)日：2023-10-24

申请号：US18003424

申请日：2021-06-23

Applicant: Polyplastics Co., Ltd.

Inventor： Naoyuki Wakitani ,  Tomoyuki Tada

IPC: C08F4/64 ,  C08F4/76 ,  C08F232/04 ,  C08F2/06 ,  C08F4/08 ,  C08F4/30 ,  C08K3/02 ,  C08F232/06 ,  C08F4/6592

CPC classification number: C08F232/04 ,  C08F2/06 ,  C08F4/083 ,  C08F4/30 ,  C08F4/76 ,  C08K3/02 ,  C08F4/6592 ,  C08F232/06 ,  C08F2410/04 ,  C08K2003/026

Abstract: A production method for a cyclic olefin copolymer which is capable of efficiently producing a cyclic olefin copolymer by copolymerizing monomers including a norbornene monomer and ethylene while suppressing the formation of a polyethylene-like impurity, and a catalyst composition for the copolymerization of a norbornene monomer and ethylene. Monomers including a norbornene monomer and ethylene are polymerized in the presence of a metal-containing catalyst, and the metal-containing catalyst has a structure in which a nitrogen atom is bonded to a transition metal of Group 4 of the periodic table and an atom of Group 15 of the periodic table.

公开(公告)号：US20230312786A1

公开(公告)日：2023-10-05

申请号：US18006803

申请日：2021-06-04

Applicant: Polyplastics Co., Ltd.

Inventor： Hiroyuki KOMATSU ,  Tomoyuki TADA

IPC: C08F210/02

CPC classification number: C08F210/02

Abstract: A production method for a cyclic olefin copolymer, which is capable of efficiently producing a cyclic olefin copolymer by copolymerizing monomers including a norbornene monomer and ethylene while suppressing the formation of a polyethylene-like impurity and an excessive increase in molecular weight. In the polymerization of monomers including a norbornene monomer and ethylene in the presence of a metallocene catalyst, the metallocene catalyst having a ligand including a cyclopentadiene ring and a structure in which a heteroatom being N, O, S or P is bonded to a transition metal of Group IV of the periodic table and an sp2 carbon, and an alkylmetal compound are used in combination.

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：US11607868B2

公开(公告)日：2023-03-21

申请号：US17262880

申请日：2019-08-09

Applicant: Polyplastics Co., Ltd.

Inventor： Takuhei Tsukada ,  Akihiro Mochizuki

IPC: B32B15/08 ,  B32B3/30 ,  B32B7/027

Abstract: A structure capable of leaving a repetition of heating and cooling as a dynamic deformation amount. The structure retains joining performance of a laminated body made of two types of materials having different thermal properties.

公开(公告)号：US20230069128A1

公开(公告)日：2023-03-02

申请号：US17785738

申请日：2020-12-16

Applicant: Polyplastics Co., Ltd.

Inventor： Itsuki Saito ,  Kazuya Goshima

IPC: C08L67/02

Abstract: A polybutylene terephthalate resin composition is disclosed containing, with respect to 100 parts by mass of a polybutylene terephthalate resin (A) having a carboxylic acid terminal group of 35 meq/kg or less, 0.5 parts by mass or more and 10 parts by mass or less of an epoxy-based resin (B), and a quaternary ammonium salt (C); a molded article comprising the polybutylene terephthalate resin composition; a thickening inhibitor for a polybutylene terephthalate resin composition, the thickening inhibitor containing a quaternary ammonium salt; and a hydrolysis inhibitor for a molded article comprising a polybutylene terephthalate resin composition, the hydrolysis inhibitor containing a quaternary ammonium salt.