公开(公告)号：US20240026053A1

公开(公告)日：2024-01-25

申请号：US18029786

申请日：2021-09-03

Applicant: Polyplastics Co., Ltd.

Inventor： Tomoyuki Tada ,  Naoyuki Wakitani ,  Atsushi Nakano

IPC: C08F232/08 ,  C08F210/02 ,  C08K5/12 ,  G02B1/04

CPC classification number: C08F232/08 ,  G02B1/04 ,  C08K5/12 ,  C08F210/02

Abstract: A transparent article is obtained by molding a cyclic olefin copolymer or a resin composition containing the cyclic olefin copolymer. The cyclic olefin copolymer is obtained by a process that at least includes a step of preparing a norbornene monomer and ethylene as monomers in a polymerization vessel and a step of polymerizing the monomers in the polymerization vessel in the presence of a metal-containing catalyst. The metal-containing catalyst satisfies predetermined conditions.

公开(公告)号：US20230391906A1

公开(公告)日：2023-12-07

申请号：US18247420

申请日：2021-09-16

Applicant: Polyplastics Co., Ltd.

Inventor： Tomoyuki Tada ,  Naoyuki Wakitani ,  Hiroyuki Komatsu

IPC: C08F210/02 ,  C08F4/6592

CPC classification number: C08F210/02 ,  C08F4/6592

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. The monomers including a norbornene monomer and ethylene are polymerized in the presence of a metallocene catalyst containing a cyclopentadiene ligand which is substituted with an alkyl group optionally substituted with a halogen atom, or a trialkylsilyl group, and satisfies specific conditions for substituent(s).

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：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

IPC: C08L59/04 ,  C08L71/02 ,  C08K3/22 ,  C08K5/3472 ,  C08K5/20 ,  C08K5/13 ,  C08K5/17

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.

公开(公告)号：US20230192930A1

公开(公告)日：2023-06-22

申请号：US18003424

申请日：2021-06-23

Applicant: Polyplastics Co., Ltd.

Inventor： Naoyuki WAKITANI ,  Tomoyuki TADA

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

CPC classification number: C08F232/04 ,  C08F4/76 ,  C08F4/083 ,  C08F4/30 ,  C08F2/06 ,  C08K3/02 ,  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：US11158471B2

公开(公告)日：2021-10-26

申请号：US15777594

申请日：2016-11-21

Applicant: BOURNS KK ,  POLYPLASTICS CO., LTD.

Inventor： Masashi Namikawa ,  Shinichi Hirota

IPC: H01H37/04 ,  H01H37/64 ,  H01H11/00

Abstract: Provided is a breaker capable of further downsizing without impairing rigidity and strength of a case. The breaker 1 comprises a fixed contact 21, a movable piece 4 having and pressing a movable contact 41 to the fixed contact 21, a thermally responsive element 5 for moving the movable piece 4 to separate the movable contact 41 from the fixed contact 21 by deformation thereof responding to temperature change, a case for containing the fixed piece 21, the movable piece 4 and the thermally responsive element 5, and a cover piece 8 attached on the case 7. The case 7 has an end face 72 on which the cover piece 8 is disposed, a containing recess 73 caved from the end face 72 and forming a space to which the movable piece 4 and the thermally responsive element 5 are contained, and a first protrusion protruding from the end face 72 and to which the cover piece 8 is fitted.

公开(公告)号：US11091635B1

公开(公告)日：2021-08-17

申请号：US17049750

申请日：2019-04-25

Applicant: Polyplastics Co., Ltd.

Inventor： Katsuhei Ohnishi ,  Tatsuya Kanezuka

IPC: C08L81/02 ,  B32B15/08 ,  B29C45/14 ,  B29C45/27 ,  B29K705/00 ,  B29K81/00

Abstract: A polyarylene sulfide-based resin composition is disclosed containing a polyarylene sulfide-based resin A, an inorganic filler B, and olefinic copolymers C and D each having predetermined structural units, wherein: the inorganic filler B contains a fibrous inorganic filler B1 having a different diameter ratio of 1.5 or less and a fibrous inorganic filler B2 having a different diameter ratio of 3.0 or more; a mass ratio B1/B2 of the fibrous inorganic filler B1 and the fibrous inorganic filler B2 is 0.2 or more and 5.0 or less; and the contents of the olefinic copolymers C and D are respectively 3 parts by mass or more and less than 19 parts by mass and 3 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the polyarylene sulfide-based resin A.

公开(公告)号：US20210210297A1

公开(公告)日：2021-07-08

申请号：US15777594

申请日：2016-11-21

Applicant: BOURNS KK ,  POLYPLASTICS CO., LTD.

Inventor： Masashi NAMIKAWA ,  Shinichi HIROTA

IPC: H01H37/04 ,  H01H37/64 ,  H01H11/00

Abstract: Provided is a breaker capable of further downsizing without impairing rigidity and strength of a case. The breaker comprises a fixed contact, a movable piece 4 having and pressing a movable contact to the fixed contact, a thermally responsive element for moving the movable piece to separate the movable contact from the fixed contact by deformation thereof responding to temperature change, a case for containing the fixed piece, the movable piece and the thermally responsive element, and a cover piece attached on the case. The case has an end face on which the cover piece is disposed, a containing recess caved from the end face and forming a space to which the movable piece and the thermally responsive element are contained, and a first protrusion protruding from the end face and to which the cover piece is fitted.

公开(公告)号：US20210095112A1

公开(公告)日：2021-04-01

申请号：US17051919

申请日：2019-04-24

Applicant: Polyplastics Co., Ltd.

Inventor： Hiroki Arai ,  Tornohiro 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：US10927255B2

公开(公告)日：2021-02-23

申请号：US16065479

申请日：2016-12-20

Applicant: Polyplastics Co., Ltd.

Inventor： Katsuhei Ohnishi ,  Hiroki Arai ,  Kuniaki Matsuda

IPC: C08L81/04 ,  B29C45/14 ,  C08L33/14 ,  C08L81/02 ,  B29C45/00 ,  C08K5/13 ,  C08K7/04 ,  B29C45/34 ,  B29K81/00 ,  B29K105/00 ,  B29K105/16 ,  B29K509/00 ,  B29K705/00

Abstract: A polyarylene sulfide resin composition characterized by comprising a polyarylene sulfide resin, and an olefinic copolymer comprising an α-olefin-derived structural unit and an α,β-unsaturated acid glycidyl ester-derived structural unit, wherein the olefinic copolymer content is at least 1.0 parts by mass and less than 5.0 parts by mass with respect to 100 parts by mass of the polyarylene sulfide resin, a melt viscosity of the polyarylene sulfide resin measured at 310° C. and a shear rate of 1216 sec−1 is at least 70 Pa·s and at most 300 Pa·s, and a flow length for a width of 20 mm and a thickness of 1 mm, at a cylinder temperature of 320° C., an injection pressure of 100 MPa and a mold temperature of 150° C., is at least 80 mm and at most 200 mm.