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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
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.
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公开(公告)号：US20190002693A1
公开(公告)日：2019-01-03
申请号：US16065479
申请日：2016-12-20
Applicant: Polyplastics Co., Ltd.
Inventor： Katsuhei Ohnishi , Hiroki Arai , Kuniaki Matsuda
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.
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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
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.
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公开(公告)号：US10017643B2
公开(公告)日：2018-07-10
申请号：US15029697
申请日：2014-10-24
Applicant: POLYPLASTICS CO., LTD.
Inventor： Hiroki Arai
IPC: C08L81/04 , C08J3/20 , C08L67/02 , C08L101/00 , C09D181/04 , C08G77/442
CPC classification number: C08L81/04 , C08G77/442 , C08J3/20 , C08K7/14 , C08L51/085 , C08L67/02 , C08L83/04 , C08L101/00 , C08L2201/08 , C09D181/04
Abstract: A corona-resistant resin composition and a corona-resistant member, having sufficient durability relative to corona discharge, are provided. A corona-resistant resin composition obtained, at least, by melt kneading 7 to 80 parts by mass of a silicone-based polymer per 100 parts by mass of a resin component, and a corona-resistant member formed by molding the corona-resistant resin composition, are disclosed. A polyarylene sulfide resin or a polybutylene terephthalate resin may be used as the resin component.
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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
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.
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Patent Agency Ranking
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.
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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
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.
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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
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.
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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
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.
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公开(公告)号：US09695293B2
公开(公告)日：2017-07-04
申请号：US14437710
申请日：2013-10-24
Applicant: POLYPLASTICS CO., LTD.
Inventor： Hiroki Arai
IPC: C08K3/34 , C08L81/02 , C08L67/02 , C08L101/00
CPC classification number: C08K3/34 , C08K3/346 , C08L67/02 , C08L81/02 , C08L101/00
Abstract: A corona resistant resin composition having sufficient resistance to corona discharge, and a corona resistant member are provided. This corona resistant member is formed by molding a corona-resistant resin composition obtained by melting and mixing at least a resin component and mica, and a mode diameter of the mica in the volume-based particle size distribution measured by a laser diffraction/scattering method after molding is 1 to 200 μm. For 100 parts by mass of the resin component, there are preferably 25-101 parts by mass of mica.
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