Patents by Inventor Kazushige Inaoka
Kazushige Inaoka 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).
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Patent number: 10730989Abstract: In a method for producing a (meth)acrylamide polymer papermaking additive obtaining a (meth)acrylamide polymer by obtaining a first polymer by polymerizing a first polymerization component containing a (meth)acrylamide and polymerizing a second polymerization component containing a tertiary amino monomer under the presence of the first polymer, the first polymerization component and/or the second polymerization component contain(s) a (meth)allyl sulfonate, a ratio of the tertiary amino monomer in the first polymerization component with respect to 100 mol of the (meth)acrylamide in the first polymerization component is 0.1 mol or less, and a ratio of the (meth)acrylamide in the second polymerization component with respect to 100 mol of the tertiary amino monomer in the second polymerization component is 1.0 mol or less.Type: GrantFiled: April 27, 2018Date of Patent: August 4, 2020Assignee: HARIMA CHEMICALS, INCORPORATEDInventors: Tadaaki Horii, Hirotaka Sato, Takanori Kurihara, Takahiro Fujiwara, Kazushige Inaoka
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Publication number: 20200140596Abstract: In a method for producing a (meth)acrylamide polymer papermaking additive obtaining a (meth)acrylamide polymer by obtaining a first polymer by polymerizing a first polymerization component containing a (meth)acrylamide and polymerizing a second polymerization component containing a tertiary amino monomer under the presence of the first polymer, the first polymerization component and/or the second polymerization component contain(s) a (meth)allyl sulfonate, a ratio of the tertiary amino monomer in the first polymerization component with respect to 100 mol of the (meth)acrylamide in the first polymerization component is 0.1 mol or less, and a ratio of the (meth)acrylamide in the second polymerization component with respect to 100 mol of the tertiary amino monomer in the second polymerization component is 1.0 mol or less.Type: ApplicationFiled: April 27, 2018Publication date: May 7, 2020Applicant: Harima Chemicals, IncorporatedInventors: Tadaaki HORII, Hirotaka SATO, Takanori KURIHARA, Takahiro FUJIWARA, Kazushige INAOKA
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Publication number: 20180163346Abstract: A papermaking chemical consisting of an aqueous solution of an acrylamide-based polymer, the acrylamide-based polymer being a polymer of a polymer component, wherein the polymer component comprises (meth)acrylamide, a quaternary ammonium-based monomer, and (meth)allylsulfonic acid salt, but does not include either a crosslinkable monomer containing nitrogen, or a tertiary amino-based monomer.Type: ApplicationFiled: February 9, 2018Publication date: June 14, 2018Applicant: HARIMA CHEMICALS, INCORPORATEDInventors: Hirotaka SATO, Tadaaki Horii, Takanori Kurihara, Takahiro Fujiwara, Kazushige Inaoka
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Patent number: 9995001Abstract: The acrylamide-based polymer is produced by polymerizing a polymer component including (meth)acrylamide, a quaternary ammonium-based monomer, and (meth)allylsulfonic acid salt, but not including either a crosslinkable monomer containing nitrogen or a tertiary amino-based monomer.Type: GrantFiled: October 28, 2015Date of Patent: June 12, 2018Assignee: HARIMA CHEMICALS, INCORPORATEDInventors: Hirotaka Sato, Tadaaki Horii, Takanori Kurihara, Takahiro Fujiwara, Kazushige Inaoka
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Publication number: 20160340831Abstract: The acrylamide-based polymer is produced by polymerizing a polymer component including (meth)acrylamide, a quaternary ammonium-based monomer, and (meth)allylsulfonic acid salt, but not including either a crosslinkable monomer containing nitrogen or a tertiary amino-based monomer.Type: ApplicationFiled: October 28, 2015Publication date: November 24, 2016Applicant: HARIMA CHEMICALS, INCORPORATEDInventors: Hirotaka SATO, Tadaaki HORII, Takanori KURIHARA, Takahiro FUJIWARA, Kazushige INAOKA
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Patent number: 9303361Abstract: The present invention relates to a method for producing a cationic surface sizing agent, and contains a first step of obtaining a copolymer (A) by solution-polymerizing a monomer mixture which contains a monomer having a tertiary amino group (a) in the amount of 15 to 45% by weight, a (meth)acrylic acid ester (b) in the amount of 15 to 85% by weight, and styrenes (c) in the amount of 0 to 70% by weight in the presence of a chain transfer agent; a second step of obtaining a copolymer (B) by polymerizing the copolymer (A) and a nonionic hydrophilic monomer (d); a third step of obtaining a copolymer (C) by polymerizing the copolymer (B) and a hydrophobic monomer (e) in the absence of a surfactant; and a fourth step of obtaining a quaternary ammonium salt of the copolymer (C) by quaternizing a tertiary amino group present in the copolymer (C).Type: GrantFiled: August 18, 2011Date of Patent: April 5, 2016Assignee: HARIMA CHEMICALS, INC.Inventors: Takuji Sodeyama, Yoko Hayashi, Kazushige Inaoka
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Publication number: 20140023872Abstract: The present invention relates to a method for producing a cationic surface sizing agent, and contains a first step of obtaining a copolymer (A) by solution-polymerizing a monomer mixture containing a monomer having a tertiary amino group (a), a specific (meth)acrylic acid ester (b) and styrenes (c) in the specific proportion in the presence of a chain transfer agent; a second step of obtaining a copolymer (B) by polymerizing the copolymer (A) and a hydrophobic monomer (d), in order to have a specific proportion of the copolymer (A), in an oxidation-reduction system using a water-soluble free-radical initiator and a heavy metal salt in the absence of a surfactant; and a third step of obtaining a quaternary ammonium salt of the copolymer (B) by quaternizing a tertiary amino group present in the copolymer (B).Type: ApplicationFiled: August 18, 2011Publication date: January 23, 2014Applicant: HARIMA CHEMICALS, INC.Inventors: Takuji Sodeyama, Yoko Hayashi, Kazushige Inaoka
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Publication number: 20140017505Abstract: The present invention relates to a method for producing a cationic surface sizing agent, and contains a first step of obtaining a copolymer (A) by solution-polymerizing a monomer mixture which contains a monomer having a tertiary amino group (a) in the amount of 15 to 45% by weight, a (meth)acrylic acid ester (b) in the amount of 15 to 85% by weight, and styrenes (c) in the amount of 0 to 70% by weight in the presence of a chain transfer agent; a second step of obtaining a copolymer (B) by polymerizing the copolymer (A) and a nonionic hydrophilic monomer (d); a third step of obtaining a copolymer (C) by polymerizing the copolymer (B) and a hydrophobic monomer (e) in the absence of a surfactant; and a fourth step of obtaining a quaternary ammonium salt of the copolymer (C) by quaternizing a tertiary amino group present in the copolymer (C).Type: ApplicationFiled: August 18, 2011Publication date: January 16, 2014Applicant: HARIMA CHEMICALS, INC.Inventors: Takuji Sodeyama, Yoko Hayashi, Kazushige Inaoka
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Patent number: 8241462Abstract: To provide a papermaking internal sizing agent capable of efficiently imparting sizing performance even in neutral papermaking which uses calcium carbonate as filler, and uses no aluminum sulfate or uses a small amount of aluminum sulfate, and also provide a paper or a paperboard obtained by using the papermaking internal sizing agent. The papermaking internal sizing agent comprises as an effective ingredient an amphoteric copolymer having hydrophobic groups and cationic groups, at least a part of the cationic groups being quaternized. Preferably, the amphoteric copolymer is obtained by polymerizing monomer ingredients that it essentially contain a hydrophobic monomer (A), a cationic monomer (B), and an anionic monomer (C) and that an anion equivalent of the monomer (C) is 0.1 to 90% of a cation equivalent of the monomer (B), in which a rate of quaternizing of the cationic groups is not less than 40% by mole. The paper or the paperboard contains the above papermaking internal sizing agent.Type: GrantFiled: March 6, 2008Date of Patent: August 14, 2012Assignees: Harima Chemicals, Inc., Nippon Paper Industries Co., Ltd.Inventors: Kazunari Sakai, Takahiro Fujiwara, Kazushige Inaoka, Takashi Yamaguchi, Masaki Ito, Yasunobu Ooka
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Patent number: 7988826Abstract: The invention improves a sizing effect even on paper containing no internal sizing agent and improves productivity by making solution polymerization in a small amount of an organic solvent. The invention provides a cationic surface sizing agent composed of a copolymer obtained by solution polymerization of (a) 15 to 35% by weight of a tertiary amino group-containing monomer, (b) 30 to 85% by weight of C1 to C4 alkyl(meth)acrylate, and (c) 1 to 50% by weight of styrenes in an organic solvent in the presence of a chain transfer agent. The copolymer may be subjected to cationization treatment with a quaternization agent. As a constituent monomer of the copolymer, 0 to 20% by weight of another copolymerizable vinyl monomer (d) may be contained. The cationic surface sizing agent is applied to paper.Type: GrantFiled: March 30, 2006Date of Patent: August 2, 2011Assignee: Harima Chemicals, Inc.Inventors: Kazushige Inaoka, Tomohiko Nakata, Yoshiharu Hashiguchi
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Publication number: 20100200185Abstract: To provide a papermaking internal sizing agent capable of efficiently imparting sizing performance even in neutral papermaking which uses calcium carbonate as filler, and uses no aluminum sulfate or uses a small amount of aluminum sulfate, and also provide a paper or a paperboard obtained by using the papermaking internal sizing agent. The papermaking internal sizing agent comprises as an effective ingredient an amphoteric copolymer having hydrophobic groups and cationic groups, at least a part of the cationic groups being quaternized. Preferably, the amphoteric copolymer is obtained by polymerizing monomer ingredients that it essentially contain a hydrophobic monomer (A), a cationic monomer (B), and an anionic monomer (C) and that an anion equivalent of the monomer (C) is 0.1 to 90% of a cation equivalent of the monomer (B), in which a rate of quaternizing of the cationic groups is not less than 40% by mole. The paper or the paperboard contains the above papermaking internal sizing agent.Type: ApplicationFiled: March 6, 2008Publication date: August 12, 2010Inventors: Kazunari Sakai, Takahiro Fujiwara, Kazushige Inaoka
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Publication number: 20090272507Abstract: The invention improves a sizing effect even on paper containing no internal sizing agent and improves productivity by making solution polymerization in a small amount of an organic solvent. The invention provides a cationic surface sizing agent composed of a copolymer obtained by solution polymerization of (a) 15 to 35% by weight of a tertiary amino group-containing monomer, (b) 30 to 85% by weight of C1 to C4 alkyl (meth)acrylate, and (c) 1 to 50% by weight of styrenes in an organic solvent in the presence of a chain transfer agent. The copolymer may be subjected to cationization treatment with a quaternization agent. As a constituent monomer of the copolymer, 0 to 20% by weight of another copolymerizable vinyl monomer (d) may be contained. The cationic surface sizing agent is applied to paper.Type: ApplicationFiled: March 30, 2006Publication date: November 5, 2009Inventors: Kazushige Inaoka, Tomohiko Nakata, Yoshiharu Hashiguchi
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Publication number: 20090068485Abstract: It is an object to improve sizing performance and anti-plate-soiling property in offset printing, for example, in a cationic surface sizing agent to be used for coating base paper of newsprint paper, and as a means for solving the object, a cationic surface sizing agent is produced by quaternizing a copolymer having a weight average molecular weight ranging from 30,000 to 60,000 obtained by polymerizing (a) 20 to 40% by weight of a monomer containing tertiary amino group; (b) 10 to 80% by weight of a C4 to C18 alkyl ester of (meth) acrylic acid; and (c) 0 to 70% by weight of a styrene or derivative thereof, using an azoic polymerization initiator in the presence of a chain transfer agent. In this manner, it is possible to improve sizing performance without reducing the hydrophobic level of copolymer and to suppress sensitization of printing plate such as PS plate by specifying the monomer composition ratio, using an azoic polymerization initiator, and specifying molecular weight of the copolymer.Type: ApplicationFiled: October 26, 2006Publication date: March 12, 2009Inventors: Kazushige Inaoka, Tomohiko Nakata, Yoshiharu Hashiguchi