Patents by Inventor Koju Okazaki

Koju Okazaki 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).

  • Patent number: 11312857
    Abstract: A polymerizable composition of the present invention includes a polymerization reactive compound (A), and an internal release agent (B) including a polyether-modified silicone compound (b1) represented by General Formula (1) and a polyether-modified silicone compound (b2) represented by General Formula (2), in which the polymerization reactive compound (A) is one or more compounds selected from a polyiso(thio) cyanate compound, a poly(thio) epoxy compound, a polyoxetanyl compound, a polythietanyl compound, an alkyne compound, a poly(thi)ol compound, a polyamine compound, an acid anhydride, or a polycarboxylic acid compound.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: April 26, 2022
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Motoharu Oiki, Koju Okazaki
  • Publication number: 20210284862
    Abstract: Provided is a laminate that includes a water absorbing layer (B), an antireflective function-imparting layer (C) and a hydrophilic layer (A) provided in this order on a substrate, wherein the hydrophilic layer (A) is formed of a crosslinked resin having an anionic, cationic or nonionic hydrophilic group, and has a gradient of hydrophilic groups (intensity of hydrophilic group on surface of the hydrophilic layer (A)/intensity of hydrophilic group at ½ of thickness of the hydrophilic layer (A)) of not less than 1.1; the water absorbing layer (B) is formed of a crosslinked resin having a water absorption rate per unit mass (g) of in the range of 5 to 500 wt %; and the refractive index of a layer forming the layer (C) satisfies a specific condition. The laminate can provide higher antifogging properties and antireflective properties.
    Type: Application
    Filed: August 25, 2017
    Publication date: September 16, 2021
    Applicants: Mitsui Chemicals, Inc., Chemat Technology, Inc.
    Inventors: Takayuki HANAWA, Koju OKAZAKI, Kaoru OHSHIMIZU, Motoharu OIKI, Ken TAKAMATSU, Haixing ZHENG
  • Publication number: 20200010665
    Abstract: A polymerizable composition of the present invention includes a polymerization reactive compound (A), and an internal release agent (B) including a polyether-modified silicone compound (b1) represented by General Formula (1) and a polyether-modified silicone compound (b2) represented by General Formula (2), in which the polymerization reactive compound (A) is one or more compounds selected from a polyiso(thio) cyanate compound, a poly(thio) epoxy compound, a polyoxetanyl compound, a polythietanyl compound, an alkyne compound, a poly(thi)ol compound, a polyamine compound, an acid anhydride, or a polycarboxylic acid compound.
    Type: Application
    Filed: March 7, 2018
    Publication date: January 9, 2020
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Motoharu OIKI, Koju OKAZAKI
  • Patent number: 10519060
    Abstract: A process for producing a polymerizable composition for an optical material of the present invention includes a step of mixing (A) at least one kind of thiol compound having at least two mercapto groups, (B) a tin compound represented by general formula (1), and (C) at least one kind of isocyanate compound having at least two isocyanato groups, in which the polymerizable composition for an optical material obtained in the above step has a haze value of 0.05 or less.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: December 31, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Kouji Suesugi, Naoki Shinohara, Koju Okazaki
  • Patent number: 10428194
    Abstract: The purpose of the present invention is to provide a modified acrylic resin cured product, particularly, a modified acrylic resin film, having excellent lubricity and excellent transparency, and a laminate including the modified acrylic resin film. The modified acrylic resin cured product (C) according to the present invention is obtained by treating the surface of a cured product (X) including an acrylic resin by using a compound (A) containing, in each molecule, one or more anionic hydrophilic groups forming an ion pair with an onium ion of an amino silicone, and one or more groups selected from the group consisting of a group containing a polymerizable carbon-carbon double bond, an amino group, a mercapto group and a hydroxy group.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: October 1, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventor: Koju Okazaki
  • Publication number: 20190202184
    Abstract: It is a main object of the present invention to impart higher antifogging properties to the hydrophilic material formed of a crosslinked resin, having a surface enriched with hydrophilic groups, previously proposed by the inventors. The laminate of the present invention includes a water absorbing layer (B) and a hydrophilic layer (A) provided in this order on a substrate, wherein the hydrophilic layer (A) is formed of a crosslinked resin having an anionic, cationic or nonionic hydrophilic group, and has a gradient of hydrophilic groups (intensity of hydrophilic group on surface of the hydrophilic layer (A)/intensity of hydrophilic group at ½ of thickness of the hydrophilic layer (A)) of not less than 1.1; and the water absorbing layer (B) is formed of a crosslinked resin having a water absorption rate per unit mass (g) of in the range of 5 to 500 wt %.
    Type: Application
    Filed: August 25, 2017
    Publication date: July 4, 2019
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Takayuki HANAWA, Koju OKAZAKI
  • Patent number: 10040947
    Abstract: The present invention aims to provide a primer composition that can give good adhesion between an acrylic resin and an inorganic substrate, such as a substrate formed of metal, metal oxide, glass, ceramic, cement, or mortar and is suitably used as a primer for bonding them together. The primer composition is produced by mixing (a) a polythiol having at least two mercapto groups in one molecule, (b) a silane compound having at least one functional group and at least one alkoxysilyl group in one molecule, the at least one functional group being reactive with a mercapto group, and water.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: August 7, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventor: Koju Okazaki
  • Publication number: 20180194672
    Abstract: A process for producing a polymerizable composition for an optical material of the present invention includes a step of mixing (A) at least one kind of thiol compound having at least two mercapto groups, (B) a tin compound represented by general formula (1), and (C) at least one kind of isocyanate compound having at least two isocyanato groups, in which the polymerizable composition for an optical material obtained in the above step has a haze value of 0.05 or less.
    Type: Application
    Filed: August 5, 2016
    Publication date: July 12, 2018
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Kouji SUESUGI, Naoki SHINOHARA, Koju OKAZAKI
  • Publication number: 20180163056
    Abstract: A monolayer film which includes a crosslinked resin obtained by polymerizing a composition including compound (I) having at least one hydrophilic group selected from anionic hydrophilic groups, cationic hydrophilic groups and hydroxyl groups, and at least one functional group with a polymerizable carbon-carbon double bond wherein the number of the functional groups with a polymerizable carbon-carbon double bond is one when the hydrophilic group is a hydroxyl-containing group; compound (II) having two or more functional groups with a polymerizable carbon-carbon double bond; and at least one compound selected from a surfactant (III) having a hydrophilic moiety including an anionic hydrophilic group, a cationic hydrophilic group or two or more hydroxyl groups, and a hydrophobic moiety including an organic residue, and compound (IV) having a siloxane bond and a molecular weight of 200 to 1,000,000 wherein the surfactant (III) and the compound (IV) have no polymerizable carbon-carbon double bonds.
    Type: Application
    Filed: December 5, 2014
    Publication date: June 14, 2018
    Applicant: MITSUI CHEMICALS, INC.
    Inventor: Koju OKAZAKI
  • Patent number: 9976050
    Abstract: The invention provides a cured product (for example, a film including the cured product) which has an excellent balance between hydrophilicity and abrasion resistance, can retain high hydrophilicity even when washed with water, and can remain hydrophilic and resistant to the attachment of (or can be easily cleaned of) contaminants even when subjected to long storage or heating, and a composition which can give such cured products. A cured product is obtained by curing a composition which includes a copolymer (i) including structural units represented by specific chemical formulae, and an amino resin (ii).
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: May 22, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventor: Koju Okazaki
  • Patent number: 9976049
    Abstract: The invention provides monolayer films excellent in hydrophilicity and transparency which include a crosslinked resin having a surface enriched with hydrophilic groups, and materials which exhibit excellent properties such as hydrophilicity, antifogging properties and antifouling properties by virtue of having the above monolayer films. A monolayer film is fabricated which includes a crosslinked resin obtained by polymerizing a composition including a compound (I) having an anionic hydrophilic group and a functional group with a polymerizable carbon-carbon double bond, and a compound (II) having three or more hydroxyl groups and three or more functional groups with a polymerizable carbon-carbon double bond, the monolayer film having a gradient (Sa/Da) of not less than 1.1 wherein Sa is the surface concentration of the anionic hydrophilic groups in the monolayer film, and Da is the deep concentration of the hydrophilic groups at ½ of the thickness of the monolayer film.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: May 22, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventor: Koju Okazaki
  • Publication number: 20180036995
    Abstract: Provided are a hydrophilic monolayer film and a method for producing the monolayer film. The monolayer film has a surface structure with multiple protrusions and depressions. The distance between the peaks of adjoining protrusions is in the range of 1 nm to 800 nm. The monolayer film is formed of a crosslinked resin produced by curing of a polymerizable composition that contains a compound having a specific hydrophilic group and a functional group with a polymerizable carbon-carbon double bond and a compound having two or more (meth)acryloyl groups. A gradient of the concentration of hydrophilic groups (Sa2/Da2) in the monolayer film is not less than 1.1 wherein Sa is the concentration of at least one type of hydrophilic groups and a hydroxyl group at the top layer, and Da is the depth concentration of the hydrophilic groups at ½ of the thickness of the monolayer film.
    Type: Application
    Filed: March 8, 2016
    Publication date: February 8, 2018
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Koju OKAZAKI, Takayuki HANAWA
  • Publication number: 20180030230
    Abstract: The purpose of the present invention is to provide a modified acrylic resin cured product, particularly, a modified acrylic resin film, having excellent lubricity and excellent transparency, and a laminate including the modified acrylic resin film. The modified acrylic resin cured product (C) according to the present invention is obtained by treating the surface of a cured product (X) including an acrylic resin by using a compound (A) containing, in each molecule, one or more anionic hydrophilic groups forming an ion pair with an onium ion of an amino silicone, and one or more groups selected from the group consisting of a group containing a polymerizable carbon-carbon double bond, an amino group, a mercapto group and a hydroxy group.
    Type: Application
    Filed: February 24, 2016
    Publication date: February 1, 2018
    Applicant: MITSUI CHEMICALS, INC.
    Inventor: Koju OKAZAKI
  • Publication number: 20170210937
    Abstract: The invention provides a cured product (for example, a film including the cured product) which has an excellent balance between hydrophilicity and abrasion resistance, can retain high hydrophilicity even when washed with water, and can remain hydrophilic and resistant to the attachment of (or can be easily cleaned of) contaminants even when subjected to long storage or heating, and a composition which can give such cured products. A cured product is obtained by curing a composition which includes a copolymer (i) including structural units represented by specific chemical formulae, and an amino resin (ii).
    Type: Application
    Filed: July 28, 2015
    Publication date: July 27, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventor: Koju OKAZAKI
  • Publication number: 20170209345
    Abstract: An object of the present invention is to provide a dental material, particularly, a dental prosthesis, having excellent properties such as hydrophilicity and antifouling properties. The dental prosthesis according to the present invention includes a monolayer film obtained by curing a composition including: a compound (I) having at least one hydrophilic group selected from anionic hydrophilic groups and cationic hydrophilic groups, and at least one functional group with a polymerizable carbon-carbon double bond; a compound (II) having two or more functional groups with a polymerizable carbon-carbon double bond (wherein the compound (II) has no anionic hydrophilic group nor cationic hydrophilic group); and a surfactant (III) having a hydrophilic moiety including an anionic hydrophilic group, a cationic hydrophilic group or two or more hydroxyl groups, and a hydrophobic moiety composed of an organic residue (wherein the surfactant has no polymerizable carbon-carbon double bond).
    Type: Application
    Filed: July 8, 2015
    Publication date: July 27, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Akira HASEGAWA, Yasufumi TSUCHIYA, Koya KOJIMA, Koju OKAZAKI, Yohsuke ASANO, Kenichi FUJII, Takaaki HAYASHI
  • Publication number: 20170044393
    Abstract: The invention provides monolayer films excellent in hydrophilicity and transparency which include a crosslinked resin having a surface enriched with hydrophilic groups, and materials which exhibit excellent properties such as hydrophilicity, antifogging properties and antifouling properties by virtue of having the above monolayer films. A monolayer film is fabricated which includes a crosslinked resin obtained by polymerizing a composition including a compound (I) having an anionic hydrophilic group and a functional group with a polymerizable carbon-carbon double bond, and a compound (II) having three or more hydroxyl groups and three or more functional groups with a polymerizable carbon-carbon double bond, the monolayer film having a gradient (Sa/Da) of not less than 1.1 wherein Sa is the surface concentration of the anionic hydrophilic groups in the monolayer film, and Da is the deep concentration of the hydrophilic groups at ½ of the thickness of the monolayer film.
    Type: Application
    Filed: May 12, 2015
    Publication date: February 16, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventor: Koju OKAZAKI
  • Patent number: 9512034
    Abstract: A hydrophilic film that has high adhesion to inorganic materials and is safer and excellent in transparency and also exhibits both very high hydrophilicity and abrasion resistance, and a laminate including the hydrophilic film. The hydrophilic film is produced by applying a specific hydrophilic compound (c) having an acryloyl group and a potassium sulfonate group or the like to a surface of a layer formed from a mixture containing a silane compound (a) including one silicon atom, a mercapto group or the like, and at least one silicon-bonded group, and a silane compound (b) including at least four silicon-bonded groups and not including groups reactive with a carbon-carbon double bond, and allowing a reaction between at least a part of acryloyl groups contained in the hydrophilic compound (c) and at least a part of mercapto groups derived from the compound (a).
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: December 6, 2016
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Koju Okazaki, Noboru Kawasaki
  • Patent number: 9273222
    Abstract: The present invention provides: a composition including a polymer (i) which has a —SO3M group and an epoxy group, wherein M represents a hydrogen atom, an alkali metal, an alkaline earth metal or an ammonium ion, and a silane compound (ii) which has at least two hydroxy group(s), alkoxy group(s) or halogen atom(s) that are each bound to a silane atom; and a hydrophilic film obtained by curing the composition. The hydrophilic film of the present invention is excellent in its hydrophilicity, durability, abrasion resistance and weather resistance and has high antifogging, antifouling, antistatic and quick-drying (water evaporation) properties. Therefore, a variety of laminates in which the hydrophilic film of the present invention is laminated on a substrate can also be provided.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: March 1, 2016
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Koju Okazaki, Noboru Kawasaki, Kenichi Fujii
  • Publication number: 20160046827
    Abstract: Provided are a film in which the balance between hydrophilicity and abrasion resistance is superior, decrease in hydrophilicity by water is minimal, and the weather resistance is also superior; as well as a polymer and a polymer composition that can yield such a film. The film of the invention is prepared from a specific copolymer (i) having a sulfonic acid-containing group, an epoxy group, and a specific alkoxysilyl group in a molecule, or from a composition including the copolymer (i).
    Type: Application
    Filed: April 7, 2014
    Publication date: February 18, 2016
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Koju OKAZAKI, Takayuki HANAWA, Shigetoshi KUMA
  • Publication number: 20160032036
    Abstract: Provided are a cured product (for example, a film), in which the balance between hydrophilicity and abrasion resistance is superior, decrease in hydrophilicity by water is minimal, and the weather resistance is also superior, as well as a polymer and a polymer composition that can yield such a cured product. A polymer of the invention is a specific copolymer (i) having a sulfonic acid-containing group, an epoxy group, and a specific alkoxysilyl group in a molecule.
    Type: Application
    Filed: April 7, 2014
    Publication date: February 4, 2016
    Applicant: Mitsui Chemicals, Inc.
    Inventor: Koju OKAZAKI