Patents by Inventor Shunji Sekiguchi

Shunji Sekiguchi 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: 20220282019
    Abstract: The present invention has an object to provide a modified polyolefin resin capable of forming a coating film that is excellent in water-resistant adhesiveness under a high temperature condition. The present invention provides a modified polyolefin resin including a graft-modified product in which a component (A) that is a polyolefin resin is graft-modified with a component (B) that is an ?, ?-unsaturated carboxylic acid or a derivative thereof, and having a tensile modulus of 250 MPa or higher, and a weight-average molecular weight of 70,000 or more and less than 200,000.
    Type: Application
    Filed: August 24, 2020
    Publication date: September 8, 2022
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Ryo KOIKE, Fumiyasu SAKAKIBARA, Shunji SEKIGUCHI, Ryuji DOI
  • Publication number: 20220186014
    Abstract: An object is to provide a dispersion resin composition which can maintain dispersion stability even if the added amount of an emulsifier is reduced. Provided is a dispersion resin composition including, at least: a modified polyolefin resin in which a modification component containing an ?,?-unsaturated carboxylic acid derivative with a ring structure has been introduced to a polyolefin resin; and an aqueous dispersion medium, wherein the modified polyolefin resin has a degree of ring opening, represented by the equation (1), of 70 or more: degree of ring opening=modification degree K×rate of ring opening R ??(1) (in the equation (1), the modification degree K represents a containing rate (% by weight) of the ?,?-unsaturated carboxylic acid derivative relative to the polyolefin resin, and the rate of ring opening R represents a rate of ring opening (%) of the ring structure in the ?,?-unsaturated carboxylic acid derivative).
    Type: Application
    Filed: March 10, 2020
    Publication date: June 16, 2022
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Shunji SEKIGUCHI, Ryuji DOI, Fumiyasu SAKAKIBARA, Takao YOSHIMOTO, Ryo KOIKE
  • Publication number: 20220017671
    Abstract: A modified polyolefin resin may be capable of obtaining an intended adhesion strength regardless of a kind of a base resin thereof even when graft modification is carried out by using an ?,?-unsaturated carboxylic acid derivative having a cyclic structure. Such a modified polyolefin resin may be a modified product of a polyolefin resin and satisfying (A) and (B): (A): a modifying component includes an ?,?-unsaturated carboxylic acid derivative having a cyclic structure; and (B): a ring-opening degree expressed by formula (1) is 40 or more. Ring-opening degree=modification degree K×ring-opening rate R??(1): wherein, in formula (1), the modification degree K is a grafting weight (% by weight) of the ?,?-unsaturated carboxylic acid derivative, and the ring-opening rate R is a ring-opening rate (%) of the cyclic structure in the ?,?-unsaturated carboxylic acid derivative.
    Type: Application
    Filed: November 26, 2019
    Publication date: January 20, 2022
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Isamu ONO, Kei KONDO, Koji KIMURA, Takato TAKENAKA, Yuuko NAHARA, Shunji SEKIGUCHI
  • Publication number: 20220010048
    Abstract: A modified polyolefin resin having an intended adhesion strength to various substrates even when graft modification may be carried out by using an ?,?-unsaturated carboxylic acid derivative having a cyclic structure. The modified polyolefin resin may be a modified product of a polyolefin resin and satisfies conditions (A) to (C): condition (A)—a modifying component includes an ?,?-unsaturated carboxylic acid derivative having a cyclic structure; condition (B)—a ring-opening degree expressed by formula (1) is 40 or more; and condition (C)—the polyolefin resin includes an ethylene structural unit, ring-opening degree=modification degree K×ring-opening rate R??(1) wherein, in the formula (1), the modification degree K is a grafting weight (wt. %) of the ?,?-unsaturated carboxylic acid derivative, and the ring-opening rate R is a ring-opening rate (%) of the cyclic structure in the ?,?-unsaturated carboxylic acid derivative.
    Type: Application
    Filed: November 26, 2019
    Publication date: January 13, 2022
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Isamu ONO, Kei KONDO, Koji KIMURA, Takato TAKENAKA, Yuuko NAHARA, Shunji SEKIGUCHI
  • Publication number: 20210221926
    Abstract: A modified polyolefin resin is described. The modified polyolefin resin can enhance a cleaning property upon cleaning inside of a coating machine with a cleaning solvent including water, and is excellent in a balance between heat resistance and solution stability. The modified polyolefin resin is a polyolefin resin that is modified with an ?,?-unsaturated carboxylic acid or a derivative thereof and with an amino alcohol having a primary or a secondary amino group.
    Type: Application
    Filed: May 30, 2019
    Publication date: July 22, 2021
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Fumiyasu SAKAKIBARA, Ryuji DOI, Kei KONDO, Takao YOSHIMOTO, Chiaki HIRAOKA, Shunji SEKIGUCHI, Isamu ONO, Koji KIMURA, Takato TAKENAKA, Naosuke KOMOTO
  • Patent number: 10435558
    Abstract: The present invention aims to provide a resin having an excellent solubility to alcohols, an excellent adherability to nonpolar base materials such as polyolefin, and not containing chlorine; and to provide a resin composition containing a urethane resin, not having the elimination problem of hydrochloric acid caused by external factors, having a good compatibility with a variety of components containing urethane resins, and having a good adherability to a variety of base materials, so that the resin composition can suitably be used as an ink, an adhesive, and paint.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: October 8, 2019
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Minoru Yada, Yuu Takata, Junichi Hayakawa, Shunji Sekiguchi, Kazutaka Nakagawa
  • Publication number: 20170275457
    Abstract: The present invention aims to provide a resin having an excellent solubility to alcohols, an excellent adherability to nonpolar base materials such as polyolefin, and not containing chlorine; and to provide a resin composition containing a urethane resin, not having the elimination problem of hydrochloric acid caused by external factors, having a good compatibility with a variety of components containing urethane resins, and having a good adherability to a variety of base materials, so that the resin composition can suitably be used as an ink, an adhesive, and paint.
    Type: Application
    Filed: August 26, 2015
    Publication date: September 28, 2017
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Minoru YADA, Yuu TAKATA, Junichi HAYAKAWA, Shunji SEKIGUCHI, Kazutaka NAKAGAWA
  • Patent number: 9458267
    Abstract: It is an object of the present invention to provide a chlorinated polyolefin resin having favorable adhesion to a polyolefin resin and high solubility in a composition containing an alcohol-based solvent. The present invention provides a chlorinated polyolefin resin that exhibits, in infrared spectroscopy spectrum measurement, a peak area ratio A/B×100 of 10% or higher, a peak area ratio C/B×100 of 30 to 80%, and a peak area ratio A/C×100 of 30% or higher (wherein “A” is the area of a peak resulting from hydroxyl groups, “B” is the area of a peak resulting from methylene groups, and “C” is the area of a peak resulting from carbonyl groups). The present invention also provides an ink composition for gravure printing or flexography that contains the chlorinated polyolefin resin, a printed material obtained using the above composition, and a printing method using the above composition.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: October 4, 2016
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Isamu Ono, Yuu Kitamura, Takao Yoshimoto, Masanori Tanaka, Shunji Sekiguchi
  • Publication number: 20160046741
    Abstract: It is an object of the present invention to provide a chlorinated polyolefin resin having favorable adhesion to a polyolefin resin and high solubility in a composition containing an alcohol-based solvent. The present invention provides a chlorinated polyolefin resin that exhibits, in infrared spectroscopy spectrum measurement, a peak area ratio A/B×100 of 10% or higher, a peak area ratio C/B×100 of 30 to 80%, and a peak area ratio A/C×100 of 30% or higher (wherein “A” is the area of a peak resulting from hydroxyl groups, “B” is the area of a peak resulting from methylene groups, and “C” is the area of a peak resulting from carbonyl groups). The present invention also provides an ink composition for gravure printing or flexography that contains the chlorinated polyolefin resin, a printed material obtained using the above composition, and a printing method using the above composition.
    Type: Application
    Filed: March 19, 2014
    Publication date: February 18, 2016
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Isamu ONO, Yuu KITAMURA, Takao YOSHIMOTO, Masanori TANAKA, Shunji SEKIGUCHI
  • Publication number: 20070191547
    Abstract: A modified polyolefin resin which is obtained by graft modifying a propylene-based random copolymer having a melting point of 50 to 130° C. obtainable by polymerization in the presence of a metallocene catalyst, with an unsaturated carboxylic acid and/or its derivative, and has a weight average molecular weight of 15,000 to 200,000, the graft weight of the unsaturated carboxylic acid and/or its derivative therein being in the range of 0.2 to 50% by weight, is suited as a binder, a primer, an adhesive and the like against a base to which a coating or the like is difficult to adhere in a stable manner. The polyolefin resin of the present invention is superior in adhesive strength, gasohol resistance, blocking resistance and the like. The polyolefin resin of the present invention is also superior in adhesive strength even when low temperature baking is conducted.
    Type: Application
    Filed: February 14, 2005
    Publication date: August 16, 2007
    Applicant: NIPPON PAPER CHEMICALS., LTD
    Inventor: Shunji Sekiguchi
  • Patent number: 6800688
    Abstract: A resin which has excellent adhesion to nonpolar substrates, is nontacky, and has satisfactory solubility in aromatic or nonaromatic solvents and satisfactory compatibility with other resins. The resin is a modified polyolefin resin having a weight-average molecular weight of 15,000 to 150,000 obtained by modifying a polyolefin resin by grafting thereto (A) an unsaturated polycarboxylic acid or a derivative thereof and (B) a (meth)acrylic ester represented by a specific general formula, the contents of (A) and (B) in the modified polyolefin resin being 0.1 to 20 wt. % and 0.1 to 30 wt. %, respectively.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: October 5, 2004
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Kazuhiro Usui, Kenichi Fujino, Terumasa Fujitaka, Tadashi Matsui, Hidetoshi Yoshioka, Shunji Sekiguchi
  • Publication number: 20040059064
    Abstract: A resin which has excellent adhesion to nonpolar substrates, is nontacky, and has satisfactory solubility in aromatic or nonaromatic solvents and satisfactory compatibility with other resins. The resin is a modified polyolefin resin having a weight-average molecular weight of 15,000 to 150,000 obtained by modifying a polyolefin resin by grafting thereto (A) an unsaturated polycarboxylic acid or a derivative thereof and (B) a (meth)acrylic ester represented by a specific general formula, the contents of (A) and (B) in the modified polyolefin resin being 0.1 to 20 wt. % and 0.1 to 30 wt. %, respectively.
    Type: Application
    Filed: August 6, 2002
    Publication date: March 25, 2004
    Inventors: Kazuhiro Usui, Kenichi Fujino, Terumasa Fujitaka, Tadashi Matsui, Hidetoshi Yoshioka, Shunji Sekiguchi