Patents by Inventor Mayumi Yasuda

Mayumi Yasuda 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).

  • Propylene-based copolymer, propylene-based copolymer composition, molded product thereof and foamed product thereof, and production process therefor
    Patent number: 9023906
    Abstract: To provide a propylene-based copolymer and a propylene-based copolymer composition, each of which has a high melt tension because it has a long-chain branched structure, exhibits excellent molding processability during molding, such as inflation molding, extrusion molding, blow molding, injection molding or vacuum forming, and is capable of favorably providing a foamed product having an excellent expansion ratio and excellent cell uniformity in the foaming stage. The propylene-based copolymer (A) of the present invention comprises 50 to 95% by mol of constituent units [i] derived from propylene, 4.9 to 49.9% by mol of constituent units [ii] derived from an ?-olefin of 2 to 10 carbon atoms other than propylene and 0.1 to 10% by mol of constituent units [iii] derived from a non-conjugated polyene (with the proviso that the total amount of the constituent units [i], [ii] and [iii] is 100% by mol), and is characterized by satisfying specific requirements (a) and (c).
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: May 5, 2015
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Masahiko Okamoto, Mayumi Yasuda, Tetsuji Kasai, Kazuyoshi Kaneko, Kyoko Kobayashi, Kotaro Ichino
  • PROPYLENE-BASED COPOLYMER, PROPYLENE-BASED COPOLYMER COMPOSITION, MOLDED PRODUCT THEREOF AND FOAMED PRODUCT THEREOF, AND PRODUCTION PROCESS THEREFOR
    Publication number: 20140088214
    Abstract: To provide a propylene-based copolymer and a propylene-based copolymer composition, each of which has a high melt tension because it has a long-chain branched structure, exhibits excellent molding processability during molding, such as inflation molding, extrusion molding, blow molding, injection molding or vacuum forming, and is capable of favorably providing a foamed product having an excellent expansion ratio and excellent cell uniformity in the foaming stage. The propylene-based copolymer (A) of the present invention comprises 50 to 95% by mol of constituent units [i] derived from propylene, 4.9 to 49.9% by mol of constituent units [ii] derived from an ?-olefin of 2 to 10 carbon atoms other than propylene and 0.1 to 10% by mol of constituent units [iii] derived from a non-conjugated polyene (with the proviso that the total amount of the constituent units [i], [ii] and [iii] is 100% by mol), and is characterized by satisfying specific requirements (a) and (c).
    Type: Application
    Filed: May 17, 2012
    Publication date: March 27, 2014
    Inventors: Masahiko Okamoto, Mayumi Yasuda, Tetsuji Kasai, Kazuyoshi Kaneko, Kyoko Kobayashi, Kotaro Ichino