公开(公告)号：US20220169788A1

公开(公告)日：2022-06-02

申请号：US17439490

申请日：2020-03-19

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08G64/38 ,  C08G64/16

Abstract: A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1) to (1-4) and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

公开(公告)号：US20230242756A1

公开(公告)日：2023-08-03

申请号：US18021310

申请日：2021-07-27

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Shotaro OHNO ,  Masahide TAKEDA ,  Mamoru NAKAJIMA ,  Keisuke TOMITA ,  Kentaro SUZUKI

IPC: C08L69/00 ,  C08L67/04 ,  C08K5/50 ,  C08K3/22

CPC classification number: C08L69/00 ,  C08K3/22 ,  C08K5/50 ,  C08L67/04 ,  C08K2003/2237 ,  C08K2201/017

Abstract: Provided are a resin composition which can provide a resin sheet having excellent light shielding properties with titanium oxide sufficiently dispersed, as well as a resin sheet, a multilayered article and a card produced therefrom. The resin composition includes a polycarbonate resin in an amount of 30 to 95 parts by mass, and titanium oxide in an amount of 5 to 40 parts by mass, wherein the titanium oxide has an average primary particle size of 0.22 to 0.26 µm based on measurement of an image observed by a scanning electron microscope (SEM), and wherein the titanium oxide has an Si content of 1.0 to 1.8 % by mass and an Al content of 1.6 to 2.2 % by mass based on measurement by X-ray fluorescence (XRF) analysis after firing at 700° C. for 2 hours.

公开(公告)号：US20210087333A1

公开(公告)日：2021-03-25

申请号：US16965913

申请日：2019-02-25

Applicant: Mitsubishi Engeering-Platics Corporation ,  MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Keisuke TOMITA ,  Hidefumi HARADA ,  Takehiko ISOBE ,  Keisuke SHIMOKAWA ,  Jugo TAGUCHI

IPC: C08G64/16 ,  C08G64/30 ,  C08K5/526 ,  C08K5/1525 ,  C08L69/00

Abstract: A polycarbonate resin composition containing 0.1 to 10 parts by mass of a polycarbonate copolymer (B) having carbonate bonding between (B1) bisphenol A and a (B2) polyalkylene glycol and 0.005 to 0.5 parts by mass of a phosphorus-containing stabilizer (C) relative to 100 parts by mass of a polycarbonate resin (A).

公开(公告)号：US20220154045A1

公开(公告)日：2022-05-19

申请号：US17428379

申请日：2020-02-03

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Fumiaki KAKEYA ,  Masahide TAKEDA ,  Keisuke TOMITA

IPC: C09J7/50 ,  C09J7/25 ,  C09J7/29 ,  C09J7/30 ,  C08G18/24 ,  C08G18/76 ,  C08G18/67

Abstract: An adhesive film or the like which is a laminate containing a substrate film containing a polycarbonate, a primer layer laminated on the surface of the substrate film, and an adhesive layer laminated on the surface of the primer layer opposite the substrate film.

公开(公告)号：US20220033655A1

公开(公告)日：2022-02-03

申请号：US17492937

申请日：2021-10-04

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08L83/16 ,  C08G77/60 ,  C08L69/00

Abstract: A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)′ to (1-4)′ and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

公开(公告)号：US20250115762A1

公开(公告)日：2025-04-10

申请号：US18979894

申请日：2024-12-13

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08L83/16 ,  C08G64/08 ,  C08G64/16 ,  C08G64/38 ,  C08G77/00 ,  C08G77/08 ,  C08G77/448 ,  C08G77/60 ,  C08L69/00 ,  G02B1/04

Abstract: A polysiloxane compound is disclosed which has siloxane constituent units represented by any of formulae (1-2) to (1-4) and prescribed polycarbonate constituent units. Also disclosed are articles comprising the polysiloxane compound, including molded bodies and optical lenses, as well as methods of manufacturing the polysiloxane compounds and of manufacturing articles comprising the polysiloxane compounds.

公开(公告)号：US20240124712A1

公开(公告)日：2024-04-18

申请号：US18515885

申请日：2023-11-21

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08L83/16 ,  C08G64/16 ,  C08G64/38 ,  C08G77/60 ,  C08L69/00

CPC classification number: C08L83/16 ,  C08G64/1666 ,  C08G64/38 ,  C08G77/60 ,  C08L69/00 ,  C08G77/80

Abstract: A polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1) to (1-4) and prescribed polycarbonate constituent units.

公开(公告)号：US20220411622A1

公开(公告)日：2022-12-29

申请号：US17774626

申请日：2020-11-16

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Keisuke TOMITA ,  Kaori SAKURAI

IPC: C08L33/12 ,  C08F212/08 ,  C08F220/06 ,  C08F220/18 ,  B32B27/30 ,  C08J5/18

Abstract: Provided is a resin composition capable of providing a plate-shaped molded article having a high refractive index as well as a high hardness, and a plate-shaped molded article, a multilayered article, and an anti-reflection film formed from the resin composition. The resin composition contains 10 to 99 parts by mass of an acrylic resin (A); and 90 to 1 part by mass of a random copolymer (B) derived from a monomer composition B composed of 5 to 95 mass % of a (meth)acrylate represented by the formula (b1) (b-1), 5 to 95 mass % of an aromatic (meth)acrylate (b-2), and 0 to 20 mass % of an additional monomer (b-3); in the formula (b1), Rb1 is a hydrogen atom or a methyl group, and Rb2 is an aliphatic group.

公开(公告)号：US20220089866A1

公开(公告)日：2022-03-24

申请号：US17428337

申请日：2020-02-04

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Keisuke TOMITA

IPC: C08L69/00

Abstract: Provided is a resin composition that is excellent in formability, and is also excellent in heat resistance and transparency when made into a formed article, as well as a formed article. The resin composition of the present invention contains a bisphenol AP type polycarbonate resin having a viscosity average molecular weight of 18,500 to 23,000; and a bisphenol A type polycarbonate resin having a viscosity average molecular weight of 10,000 to 15,000, wherein the mass ratio of the bisphenol AP type polycarbonate resin to the bisphenol A type polycarbonate resin is 20/80 to 90/10, the difference between the viscosity average molecular weight of the bisphenol AP type polycarbonate resin and the viscosity average molecular weight of the bisphenol A type polycarbonate resin is 5,000 to 13,000, and the total content of the bisphenol AP type polycarbonate resin and the bisphenol A type polycarbonate resin is more than 85% by mass of resin components contained in the composition.

公开(公告)号：US20220089865A1

公开(公告)日：2022-03-24

申请号：US17428331

申请日：2020-02-04

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Keisuke TOMITA

IPC: C08L69/00

Abstract: Provided a resin composition that is excellent in formability, and is also excellent in heat resistance and transparency when made into a formed article, as well as a formed article using the resin composition. The resin composition of the present invention contains a bisphenol AP type polycarbonate resin having a viscosity average molecular weight of 18,500 to 23,000; and a bisphenol A type polycarbonate resin having a viscosity average molecular weight of 25,000 to 35,000, wherein the ratio (WAP/WA) of the mass (WAP) of the bisphenol AP type polycarbonate resin to the mass (WA) of the bisphenol A type polycarbonate resin is 20/80 to 90/10, and the difference (|ηA−ηAP|) between the intrinsic viscosity (ηAP) of the bisphenol AP type polycarbonate resin and the intrinsic viscosity (ηA) of the bisphenol A type polycarbonate resin is 0.04 to 0.18 dL/g.