Patents by Inventor Aki Yamada

Aki Yamada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230116659
    Abstract: A polycarbonate-polyorganosiloxane copolymer comprises a polycarbonate block (A-1) formed of a repeating unit with a specific structure and a polyorganosiloxane block (A-2) containing a repeating unit with a specific structure. A difference between the haze value (haze A) after retention for 3 minutes and the haze value (haze B) after retention for 20 minutes, of the polycarbonate-polyorganosiloxane copolymer or a resin composition thereof at 300° C. or 340° C., ?haze, is less than 0.4.
    Type: Application
    Filed: December 25, 2020
    Publication date: April 13, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yasuhiro ISHIKAWA, Hajime WATANABE, Aki YAMADA
  • Publication number: 20210284837
    Abstract: Provided are a polycarbonate-based resin composition, including: 99 mass % to 1 mass % of a polycarbonate-polyorganosiloxane copolymer (A) having a predetermined repeating unit (A-1) and predetermined constituent units (A-2) and (A-3); and 1 mass % to 99 mass % of a polycarbonate-based resin (B) except the polycarbonate-polyorganosiloxane copolymer (A), and a molded body thereof.
    Type: Application
    Filed: October 3, 2017
    Publication date: September 16, 2021
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yasuhiro ISHIKAWA, Aki YAMADA
  • Patent number: 11066556
    Abstract: Provided is a polycarbonate-based resin composition containing: a polycarbonate-polyorganosiloxane copolymer (A-1) which contains a specific repeating unit and in which a polyorganosiloxane block has an average chain length of 20 or more and less than 60; a polycarbonate-polyorganosiloxane copolymer (A-2) which contains a specific repeating unit and in which a polyorganosiloxane block has an average chain length of 60 or more and less than 500; and a polycarbonate-based resin (A-3) except the polycarbonate-polyorganosiloxane copolymer (A-1) and the polycarbonate-polyorganosiloxane copolymer (A-2), wherein the ratio of the polycarbonate-based resin (A-3) to the total weight of the polycarbonate-polyorganosiloxane copolymer (A-1), the polycarbonate-polyorganosiloxane copolymer (A-2), and the polycarbonate-based resin (A-3) is 10 mass % or more.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: July 20, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki Yamada, Yasuhiro Ishikawa
  • Publication number: 20210206967
    Abstract: Provided is a polycarbonate-based resin having a ratio of an amine terminal to all terminal groups of 1.0 mol % or more.
    Type: Application
    Filed: May 31, 2019
    Publication date: July 8, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Koichi SUGA, Yumi NAKAYAMA, Aki YAMADA
  • Patent number: 10975195
    Abstract: Provided is a polycarbonate-based resin composition, including: 10 to 90 mass % of a polycarbonate-polyorganosiloxane copolymer (E-1); and 10 to 90 mass % of an aromatic polycarbonate resin (E-2) except the polycarbonate-polyorganosiloxane copolymer (E-1), in which the molecular weight distribution of the polyorganosiloxane block of the polycarbonate-polyorganosiloxane copolymer is controlled within a specific region.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: April 13, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki Yamada, Yasuhiro Ishikawa
  • Patent number: 10975225
    Abstract: Provided is a polycarbonate-based resin composition, including 0.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: April 13, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki Yamada, Yasuhiro Ishikawa
  • Patent number: 10975224
    Abstract: Provided is a polycarbonate-based resin composition containing a polycarbonate-based resin containing a polycarbonate-polyorganosiloxane copolymer, and 0.01 to 1.0 part by mass of a UV absorber with respect to 100 parts by mass of the polycarbonate-based resin, in which the molecular weight distribution of a polyorganosiloxane block in the polycarbonate-polyorganosiloxane copolymer is controlled within a specific region.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: April 13, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki Yamada, Yasuhiro Ishikawa
  • Patent number: 10717845
    Abstract: Provided is a polycarbonate-based resin composition containing a polycarbonate-based resin containing a predetermined polycarbonate-polyorganosiloxane copolymer, and 0.5 to 5 parts by mass of a white pigment with respect to 100 parts by mass of the polycarbonate-based resin, in which the molecular weight distribution of a polyorganosiloxane block in the polycarbonate-polyorganosiloxane copolymer is controlled within a specific region.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: July 21, 2020
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yasuhiro Ishikawa, Aki Yamada, Yusuke Aoki
  • Publication number: 20200148834
    Abstract: Provided is a carbonate-olefin-based copolymer including a polycarbonate block, an olefin-based polymer block, and a specific constituent unit.
    Type: Application
    Filed: July 26, 2018
    Publication date: May 14, 2020
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki YAMADA, Koichi SUGA
  • Publication number: 20180355178
    Abstract: Provided is a polycarbonate-based resin composition containing: a polycarbonate-polyorganosiloxane copolymer (A-1) which contains a specific repeating unit and in which a polyorganosiloxane block has an average chain length of 20 or more and less than 60; a polycarbonate-polyorganosiloxane copolymer (A-2) which contains a specific repeating unit and in which a polyorganosiloxane block has an average chain length of 60 or more and less than 500; and a polycarbonate-based resin (A-3) except the polycarbonate-polyorganosiloxane copolymer (A-1) and the polycarbonate-polyorganosiloxane copolymer (A-2), wherein the ratio of the polycarbonate-based resin (A-3) to the total weight of the polycarbonate-polyorganosiloxane copolymer (A-1), the polycarbonate-polyorganosiloxane copolymer (A-2), and the polycarbonate-based resin (A-3) is 10 mass % or more.
    Type: Application
    Filed: December 13, 2016
    Publication date: December 13, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki YAMADA, Yasuhiro ISHIKAWA
  • Publication number: 20180355177
    Abstract: Provided is a method of producing a polycarbonate-based resin composition, comprising using a polycarbonate-based resin containing a polycarbonate-polyorganosiloxane copolymer (A) as a raw material, and the step incorporating at least one of a styrene-based resin (B), a flame retardant (C), a flame retardant aid (D), and an inorganic filler (E) into the resin, wherein the copolymer having the following features: the copolymer has a specific polycarbonate block (A-1) and a specific polyorganosiloxane block (A-2); and in a differential molecular weight distribution curve obtained from measurement of the polyorganosiloxane block (A-2) by gel permeation chromatography using the polystyrene calibration curve, the curve having the axis of abscissa indicating a logarithmic value log(M) of a molecular weight M and the axis of ordinate indicating dw/d log(M) obtained by differentiating a concentration fraction w with respect to the logarithmic value log(M) of the molecular weight, (1) a dw/d log(M) value becomes maxim
    Type: Application
    Filed: May 24, 2016
    Publication date: December 13, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki Yamada, Yasuhiro Ishikawa
  • Publication number: 20180237609
    Abstract: Provided is a polycarbonate-based resin composition containing a polycarbonate-based resin containing a predetermined polycarbonate-polyorganosiloxane copolymer, and 0.5 to 5 parts by mass of a white pigment with respect to 100 parts by mass of the polycarbonate-based resin, in which the molecular weight distribution of a polyorganosiloxane block in the polycarbonate-polyorganosiloxane copolymer is controlled within a specific region.
    Type: Application
    Filed: March 11, 2016
    Publication date: August 23, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yasuhiro ISHIKAWA, Aki YAMADA, Yusuke AOKI
  • Publication number: 20180171108
    Abstract: Provided is a polycarbonate-based resin composition, including 0.
    Type: Application
    Filed: May 24, 2016
    Publication date: June 21, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki Yamada, Yasuhiro Ishikawa
  • Publication number: 20180127542
    Abstract: Provided is a polycarbonate-based resin composition, including: 10 to 90 mass % of a polycarbonate-polyorganosiloxane copolymer (E-1); and 10 to 90 mass % of an aromatic polycarbonate resin (E-2) except the polycarbonate-polyorganosiloxane copolymer (E-1), in which the molecular weight distribution of the polyorganosiloxane block of the polycarbonate-polyorganosiloxane copolymer is controlled within a specific region.
    Type: Application
    Filed: March 29, 2016
    Publication date: May 10, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki YAMADA, Yasuhiro ISHIKAWA
  • Publication number: 20180057661
    Abstract: Provided is a polycarbonate-based resin composition containing a polycarbonate-based resin containing a polycarbonate-polyorganosiloxane copolymer, and 0.01 to 1.0 part by mass of a UV absorber with respect to 100 parts by mass of the polycarbonate-based resin, in which the molecular weight distribution of a polyorganosiloxane block in the polycarbonate-polyorganosiloxane copolymer is controlled within a specific region.
    Type: Application
    Filed: March 29, 2016
    Publication date: March 1, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki YAMADA, Yasuhiro ISHIKAWA
  • Patent number: 9365683
    Abstract: Provided is a polycarbonate-polyorganosiloxane copolymer, including a specific polycarbonate block unit (A) and a specific polyorganosiloxane block unit (B), in which in a differential molecular weight distribution curve obtained from measurement of the polyorganosiloxane block unit (B) by gel permeation chromatography using the polystyrene calibration curve, the curve having an axis of abscissa indicating a logarithmic value log(M) of a molecular weight M and an axis of ordinate indicating dw/d log(M) obtained by differentiating a concentration fraction w with respect to the logarithmic value log(M) of the molecular weight, (1) a dw/d log(M) value becomes maximum in a range of 3.4?log(M)?4.0, and (2) in the differential molecular weight distribution curve, a ratio of a value obtained by integrating the dw/d log(M) value over a range of 4.0?Log(M)?4.5 to a value obtained by integrating the dw/d log(M) value over the entire range of the log(M) is 6% or more and 40% or less.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: June 14, 2016
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventor: Aki Yamada
  • Publication number: 20160083513
    Abstract: Provided is a polycarbonate resin for a liquid crystal member, which is produced by using an end terminator containing 3-pentadecylphenol obtained from a natural product, and which has a YI value of 1.1 or less or a light transmittance at a wavelength of 400 nm of 85% or more.
    Type: Application
    Filed: April 17, 2014
    Publication date: March 24, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Junpei MARUYAMA, Hironori TASHIRO, Toshifumi MIYAGAWA, Masayuki SHIBATA, Aki YAMADA, Koichi SUGA, Yumi NAKAYAMA
  • Publication number: 20160017102
    Abstract: Provided is a polycarbonate-polyorganosiloxane copolymer, including a specific polycarbonate block unit (A) and a specific polyorganosiloxane block unit (B), in which in a differential molecular weight distribution curve obtained from measurement of the polyorganosiloxane block unit (B) by gel permeation chromatography using the polystyrene calibration curve, the curve having an axis of abscissa indicating a logarithmic value log(M) of a molecular weight M and an axis of ordinate indicating dw/d log(M) obtained by differentiating a concentration fraction w with respect to the logarithmic value log(M) of the molecular weight, (1) a dw/d log(M) value becomes maximum in a range of 3.4?log(M)?4.0, and (2) in the differential molecular weight distribution curve, a ratio of a value obtained by integrating the dw/d log(M) value over a range of 4.0?Log(M)?4.5 to a value obtained by integrating the dw/d log(M) value over the entire range of the log(M) is 6% or more and 40% or less.
    Type: Application
    Filed: September 22, 2014
    Publication date: January 21, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventor: Aki YAMADA
  • Publication number: 20110245389
    Abstract: A polycarbonate resin composition that is enhanced in flame retardancy while maintaining transparency containing (A) a polycarbonate resin component containing from 10 to 90% by mass of (A-1) an aromatic polycarbonate resin containing a dihydroxybiphenyl as a part of a dihydric phenol, from 10 to 90% by mass of (A-2) an aromatic polycarbonate-polyorganosiloxane copolymer, and from 0 to 80% by mass of (A-3) an aromatic polycarbonate resin other than (A-1) and (A-2), and a molded product thereof. In the flame retardant polycarbonate resin composition, the content of the polyorganosiloxane in (A) is preferably from 0.3 to 1.6% by mass, and the composition may contain from 0.01 to 1 part by mass of (B) an organic metal salt per 100 parts by mass of (A).
    Type: Application
    Filed: September 18, 2009
    Publication date: October 6, 2011
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Aki Yamada, Koichi Suga