Patents by Inventor Yasuki Ohtawa

Yasuki Ohtawa 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: 8227160
    Abstract: A toner for electrophotography comprising a charge control agent comprising a specified iron-azo complex or a specified metal compound of a benzilic acid derivative, a colorant, and a resin binder comprising a polyester, the polyester being a polyester obtained by polycondensing an alcohol component containing a propylene oxide adduct of bisphenol A and a carboxylic acid component, wherein the propylene oxide adduct of bisphenol A has an average mole of propylene oxide added of from 2.4 to 4.0, and wherein an adduct with 2 mol of propylene oxide is contained in an amount of 60% by mol or less, and an adduct with 4 mol of propylene oxide is contained in an amount of 10% by mol or more, of the propylene oxide adduct of bisphenol A, and wherein the propylene oxide adduct of bisphenol A has a content ratio of primary hydroxyl groups of 10% by mol or less of the entire hydroxyl groups.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: July 24, 2012
    Assignee: Kao Corporation
    Inventors: Yasuhiro Hidaka, Kouhei Katayama, Yasuki Ohtawa
  • Patent number: 8138136
    Abstract: The present invention relates to a process for producing an alkyleneoxide adduct, including the steps of reacting an aliphatic alcohol containing a hydrocarbon group having 6 to 22 carbon atoms with an alkyleneoxide in the presence of a catalyst to obtain a reaction product containing an alkyleneoxide adduct; and subjecting the reaction product successively to acid treatment and reduction treatment, and an alkyleneoxide adduct having a carbonyl value of 5 ?mol/g or less. The alkyleneoxide adduct is useful as a raw material of various anionic surfactants, and the anionic surfactants derived from the alkyleneoxide adduct are free from undesirable coloration.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: March 20, 2012
    Assignee: Kao Corporation
    Inventors: Yasuki Ohtawa, Toshihiro Tanaka, Kaoru Ohmae
  • Publication number: 20110077434
    Abstract: In the present invention, when polyoxyalkylene alkyl ethers are produced by adding propylene oxide to a linear alcohol in the presence of an alkali catalyst, the proportion of the alkali catalyst and the proportion of propylene oxide, per mole of active hydrogen of the linear alcohol, are in specific ranges respectively and the temperature in the addition between the linear alcohol and propylene oxide is in a specific range.
    Type: Application
    Filed: December 26, 2008
    Publication date: March 31, 2011
    Applicant: KAO CORPORATION
    Inventors: Yasuki Ohtawa, Yoshifumi Nishimoto, Tetsuaki Fukushima
  • Publication number: 20100056821
    Abstract: The present invention relates to a process for producing an alkyleneoxide adduct, including the steps of reacting an aliphatic alcohol containing a hydrocarbon group having 6 to 22 carbon atoms with an alkyleneoxide in the presence of a catalyst to obtain a reaction product containing an alkyleneoxide adduct; and subjecting the reaction product successively to acid treatment and reduction treatment, and an alkyleneoxide adduct having a carbonyl value of 5 ?mol/g or less. The alkyleneoxide adduct is useful as a raw material of various anionic surfactants, and the anionic surfactants derived from the alkyleneoxide adduct are free from undesirable coloration.
    Type: Application
    Filed: October 29, 2007
    Publication date: March 4, 2010
    Applicant: KAO CORPORATION
    Inventors: Yasuki Ohtawa, Toshihiro Tanaka, Kaoru Ohmae
  • Publication number: 20100009279
    Abstract: A toner for electrophotography comprising a charge control agent comprising a specified iron-azo complex or a specified metal compound of a benzilic acid derivative, a colorant, and a resin binder comprising a polyester, the polyester being a polyester obtained by polycondensing an alcohol component containing a propylene oxide adduct of bisphenol A and a carboxylic acid component, wherein the propylene oxide adduct of bisphenol A has an average mole of propylene oxide added of from 2.4 to 4.0, and wherein an adduct with 2 mol of propylene oxide is contained in an amount of 60% by mol or less, and an adduct with 4 mol of propylene oxide is contained in an amount of 10% by mol or more, of the propylene oxide adduct of bisphenol A, and wherein the propylene oxide adduct of bisphenol A has a content ratio of primary hydroxyl groups of 10% by mol or less of the entire hydroxyl groups.
    Type: Application
    Filed: October 16, 2007
    Publication date: January 14, 2010
    Applicant: KAO CORPORATION
    Inventors: Yasuhiro Hidaka, Kouhei Katayama, Yasuki Ohtawa
  • Patent number: 7351685
    Abstract: The present invention provides a softener composition which contains a softening base having an excellent softening effect and satisfactory biodegradability. That is, the present invention provides the softener composition which comprises (A) a nonionic compound which has at least one C5-36 alkyl or alkenyl group and an amide bond but contains no dissociative group of amino or carboxyl group; and (B) at least one member selected among (B-?) cationic or ampholytic surfactants having one C5-36 alkyl or alkenyl group or one optionally substituted aryl group and (B-?) amino compounds having at least one C5-36 alkyl or alkenyl group and salts of the compounds.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: April 1, 2008
    Assignee: Kao Corporation
    Inventors: Yasuki Ohtawa, Tohru Katoh, Uichiro Nishimoto, Yoshio Hatayama, Yohei Kaneko
  • Publication number: 20070111923
    Abstract: Provided is a process for preparing a sulfuric acid amine salt (I) represented by the formula (I), which is a neutralization compound between a sulfated compound having a long chain alkyl or alkenyl group and an amine having a long chain alkyl or alkenyl group, useful as softener. wherein R31 is a linear or branched C18-36 alkyl or alkenyl group, or a group represented by the formula R36?(OA)n- (wherein R36 is a linear or branched C12-36 alkyl or alkenyl group, OA is an oxyalkylene group having 2 to 4 carbon atoms and n is a number of from 0.
    Type: Application
    Filed: January 10, 2007
    Publication date: May 17, 2007
    Inventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
  • Patent number: 7214718
    Abstract: The present invention provides a softening base and a softener having biodegradability employing a quaternary ammonium salt composition comprising (M) a monoester quaternary salt represented by the formula (I), (D) a diester quaternary salt represented by the formula (II) and (T) a triester quaternary salt represented by the formula (III), wherein the amount of (M) is 15 to 85% by weight, the amount of (D) is 0 to 44% by weight and the amount of (T) is 15 to 85% by weight based on the total amounts of (M), (D) and (T). The present invention also provides a process for producing the softener base and composition. wherein R, R1, n and X? are defined herein.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: May 8, 2007
    Assignee: Kao Corporation
    Inventors: Yasuki Ohtawa, Tohru Katoh, Takeshi Tomifuji
  • Patent number: 7179783
    Abstract: Provided is a process for preparing a sulfuric acid amine salt (I) represented by the formula (I), which is a neutralization compound between a sulfated compound having a long chain alkyl or alkenyl group and an amine having a long chain alkyl or alkenyl group, useful as softener. wherein R31 is a linear or branched C18-36 alkyl or alkenyl group, or a group represented by the formula R36—(OA)n- (wherein R36 is a linear or branched C12-36 alkyl or alkenyl group, OA is an oxyalkylene group having 2 to 4 carbon atoms and n is a number of from 0.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: February 20, 2007
    Assignee: Kao Corporation
    Inventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
  • Patent number: 7115779
    Abstract: A softener composition, which contains tri-long-chain alkyl quaternary ammonium salt that has been considered to be difficult to use as a softener base agent, and which can provide a softener composition that provides a sufficient softening performance, is provided with (A) a cationic surfactant comprising at least one selected from the group consisting of quaternary ammonium salts represented by the formulae (I), (II) or (III), wherein the ratio of quaternary ammonium salt represented by the formula (I) to the total amount of these salts exceeds 50 weight %, with the ratio thereof represented by (III) being set to not more than 10%, and (B) at least one nonionic surfactant. In this case, (A) may include tertiary amine. (wherein, R1, R2 and R3 represent long-chain alkyl groups, etc. having total carbon atoms of 8 to 40, which may be intersected by an ether group, an ester group or an amide group; R4 represents an alkyl group, etc. having carbon atoms of 1 to 6, and X? represents an anionic group.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: October 3, 2006
    Assignee: Kao Corporation
    Inventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
  • Publication number: 20060116314
    Abstract: Provided is a process for preparing a sulfuric acid amine salt (I) represented by the formula (I), which is a neutralization compound between a sulfated compound having a long chain alkyl or alkenyl group and an amine having a long chain alkyl or alkenyl group, useful as softener. wherein R31 is a linear or branched C18-36 alkyl or alkenyl group, or a group represented by the formula R36—(OA)n- (wherein R36 is a linear or branched C12-36 alkyl or alkenyl group, OA is an oxyalkylene group having 2 to 4 carbon atoms and n is a number of from 0.
    Type: Application
    Filed: January 17, 2006
    Publication date: June 1, 2006
    Inventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
  • Publication number: 20050107634
    Abstract: A softener composition, which contains tri-long-chain alkyl quaternary ammonium salt that has been considered to be difficult to use as a softener base agent, and which can provide a softener composition that provides a sufficient softening performance, is provided with (A) a cationic surfactant comprising at least one selected from the group consisting of quaternary ammonium salts represented by the formulae (I), (II) or (III), wherein the ratio of quaternary ammonium salt represented by the formula (I) to the total amount of these salts exceeds 50 weight %, with the ratio thereof represented by (III) being set to not more than 10%, and (B) at least one nonionic surfactant. In this case, (A) may include tertiary amine. (wherein, R1, R2 and R3 represent long-chain alkyl groups, etc. having total carbon atoms of 8 to 40, which may be intersected by an ether group, an ester group or an amide group; R4 represents an alkyl group, etc. having carbon atoms of 1 to 6, and X? represents an anionic group.
    Type: Application
    Filed: October 19, 2004
    Publication date: May 19, 2005
    Inventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
  • Patent number: 6855682
    Abstract: A softener composition, which contains tri-long-chain alkyl quaternary ammonium salt that has been considered to be difficult to use as a softener base agent, and which can provide a softener composition that provides a sufficient softening performance, is provided with (A) a cationic surfactant comprising at least one selected from the group consisting of quaternary ammonium salts represented by the formulae (I), (II) or (III), wherein the ratio of quaternary ammonium salt represented by the formula (I) to the total amount of these salts exceeds 50 weight %, with the ratio thereof represented by (III) being set to not more than 10%, and (B) at least one nonionic surfactant. In this case, (A) may include tertiary amine. (wherein, R1, R2 and R3 represent long-chain alkyl groups, etc. having total carbon atoms of 8 to 40, which may be intersected by an ether group, an ester group or an amide group; R4 represents an alkyl group, etc. having carbon atoms of 1 to 6, and X? represents an anionic group.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: February 15, 2005
    Assignee: Kao Corporation
    Inventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
  • Publication number: 20040023831
    Abstract: Provided is a process for preparing a sulfuric acid amine salt (I) represented by the formula (I), which is a neutralization compound between a sulfated compound having a long chain alkyl or alkenyl group and an amine having a long chain alkyl or alkenyl group, useful as softener.
    Type: Application
    Filed: April 17, 2003
    Publication date: February 5, 2004
    Inventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
  • Patent number: 6624137
    Abstract: The present invention provides a softener exhibiting a excellent softening effect and a satisfactory biodegradability.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: September 23, 2003
    Assignee: Kao Corporation
    Inventors: Tohru Katoh, Yohei Kaneko, Yasuki Ohtawa
  • Publication number: 20030176312
    Abstract: The present invention provides a softener composition which contains a softening base having an excellent softening effect and satisfactory biodegradability. That is, the present invention provides the softener composition which comprises (A) a nonionic compound which has at least one C5-36 alkyl or alkenyl group and an amide bond but contains no dissociative group of amino or carboxyl group; and (B) at least one member selected among (B-&agr;) cationic or ampholytic surfactants having one C5-36 alkyl or alkenyl group or one optionally substituted aryl group and (B-&agr;) amino compounds having at least one C5-36 alkyl or alkenyl group and salts of the compounds.
    Type: Application
    Filed: February 20, 2003
    Publication date: September 18, 2003
    Applicant: Kao Corporation
    Inventors: Yasuki Ohtawa, Tohru Katoh, Uichiro Nishimoto, Yoshio Hatayama, Yohei Kaneko
  • Patent number: 6541444
    Abstract: The present invention provides a softener composition which contains a softening base having an excellent softening effect and satisfactory biodegradability. That is, the present invention provides the softener composition that has (A) a nonionic compound which has at least one C5-C36 alkyl or alkenyl group and an amide bond but contains no dissociative group of amino or carboxyl group; and (B) at least one member selected among (B-&agr;) cationic or ampholytic surfactants having one C5-C36 alkyl or alkenyl group or one optionally substituted aryl group and (B-&bgr;) amino compounds, having at least one C5-C36 alkyl or alkenyl group and salts of the compunds.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: April 1, 2003
    Assignee: Kao Corporation
    Inventors: Yasuki Ohtawa, Tohru Katoh, Uichiro Nishimoto, Yoshio Hatayama, Yohei Kaneko
  • Publication number: 20030036499
    Abstract: A softener composition, which contains tri-long-chain alkyl quaternary ammonium salt that has been considered to be difficult to use as a softener base agent, and which can provide a softener composition that provides a sufficient softening performance, is provided with (A) a cationic surfactant comprising at least one selected from the group consisting of quaternary ammonium salts represented by the formulae (I), (II) or (III), wherein the ratio of quaternary ammonium salt represented by the formula (I) to the total amount of these salts exceeds 50 weight %, with the ratio thereof represented by (III) being set to not more than 10%, and (B) at least one nonionic surfactant. In this case, (A) may include tertiary amine.
    Type: Application
    Filed: March 8, 2002
    Publication date: February 20, 2003
    Inventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
  • Patent number: 6521588
    Abstract: The present invention provides a softener composition exhibiting an excellent softening effect and high biodegradability. That is, the present invention provides a softener composition having (A) at least one quaternary ammonium salt having at least two C5-C36 alkyl or alkenyl groups which may be interrupted by an ester linkage, amide linkage or ether linkage and (B) a tertiary amino compound (I) a salt thereof or a mixture of the same: wherein R1 and R2 represent a C1-C3 alkyl, hydroxyalkyl, aminoalkyl group or the like and R3 represents a C5-C36 alkyl group which is interrupted by an ester linkage, amide linkage or ether linkage, or the like.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: February 18, 2003
    Assignee: Kao Corporation
    Inventors: Tohru Katoh, Yasuki Ohtawa, Yohei Kaneko
  • Patent number: 6410502
    Abstract: A softener composition which comprises a component (A) containing an amine represented by the following formula (I), a salt thereof or a mixture of the same and a component (B) containing a compound represented by the following formula (II-2) as the essential component and optionally containing at least one of the compounds represented by the formulae (II-1) and (II-3), wherein the ratio of the component (A) to the component (B), namely (A)/(B), by weight is from 2/8 to 8/2: wherein R1 and R2 are the same or different and each of R1 and R2 represents a hydrogen atom, a C1-3 alkyl group, —(CmH2mO)p—H, —CnH2n—X—R3 or —CqH2q—Y—R3; m, n and q are the same or different and each of m, n and q represents an integer of 1 to 6; p represents a number selected from 1 to 10; R3 represents a linear or branched C5-22 alkyl or alkenyl group; X represents —OCO— or —COO—; and Y represents —NHCO—, —CONH—, —O&
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: June 25, 2002
    Assignee: Kao Corporation
    Inventors: Tohru Katoh, Yasuki Ohtawa, Yohei Kaneko