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).
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Patent number: 8227160Abstract: 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: GrantFiled: October 16, 2007Date of Patent: July 24, 2012Assignee: Kao CorporationInventors: Yasuhiro Hidaka, Kouhei Katayama, Yasuki Ohtawa
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Patent number: 8138136Abstract: 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: GrantFiled: October 29, 2007Date of Patent: March 20, 2012Assignee: Kao CorporationInventors: Yasuki Ohtawa, Toshihiro Tanaka, Kaoru Ohmae
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Publication number: 20110077434Abstract: 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: ApplicationFiled: December 26, 2008Publication date: March 31, 2011Applicant: KAO CORPORATIONInventors: Yasuki Ohtawa, Yoshifumi Nishimoto, Tetsuaki Fukushima
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Publication number: 20100056821Abstract: 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: ApplicationFiled: October 29, 2007Publication date: March 4, 2010Applicant: KAO CORPORATIONInventors: Yasuki Ohtawa, Toshihiro Tanaka, Kaoru Ohmae
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Publication number: 20100009279Abstract: 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: ApplicationFiled: October 16, 2007Publication date: January 14, 2010Applicant: KAO CORPORATIONInventors: Yasuhiro Hidaka, Kouhei Katayama, Yasuki Ohtawa
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Patent number: 7351685Abstract: 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: GrantFiled: February 20, 2003Date of Patent: April 1, 2008Assignee: Kao CorporationInventors: Yasuki Ohtawa, Tohru Katoh, Uichiro Nishimoto, Yoshio Hatayama, Yohei Kaneko
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Publication number: 20070111923Abstract: 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: ApplicationFiled: January 10, 2007Publication date: May 17, 2007Inventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
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Patent number: 7214718Abstract: 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: GrantFiled: October 27, 2000Date of Patent: May 8, 2007Assignee: Kao CorporationInventors: Yasuki Ohtawa, Tohru Katoh, Takeshi Tomifuji
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Patent number: 7179783Abstract: 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: GrantFiled: January 17, 2006Date of Patent: February 20, 2007Assignee: Kao CorporationInventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
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Patent number: 7115779Abstract: 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: GrantFiled: October 19, 2004Date of Patent: October 3, 2006Assignee: Kao CorporationInventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
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Publication number: 20060116314Abstract: 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: ApplicationFiled: January 17, 2006Publication date: June 1, 2006Inventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
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Publication number: 20050107634Abstract: 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: ApplicationFiled: October 19, 2004Publication date: May 19, 2005Inventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
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Patent number: 6855682Abstract: 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: GrantFiled: March 8, 2002Date of Patent: February 15, 2005Assignee: Kao CorporationInventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
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Publication number: 20040023831Abstract: 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: ApplicationFiled: April 17, 2003Publication date: February 5, 2004Inventors: Jun Kono, Tomokatsu Kusumi, Akira Sakaguchi, Yasuki Ohtawa, Ikuo Sugano, Kazutaka Shiratsuchi, Shuji Tagata
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Patent number: 6624137Abstract: The present invention provides a softener exhibiting a excellent softening effect and a satisfactory biodegradability.Type: GrantFiled: June 15, 2001Date of Patent: September 23, 2003Assignee: Kao CorporationInventors: Tohru Katoh, Yohei Kaneko, Yasuki Ohtawa
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Publication number: 20030176312Abstract: 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: ApplicationFiled: February 20, 2003Publication date: September 18, 2003Applicant: Kao CorporationInventors: Yasuki Ohtawa, Tohru Katoh, Uichiro Nishimoto, Yoshio Hatayama, Yohei Kaneko
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Patent number: 6541444Abstract: 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: GrantFiled: December 29, 2000Date of Patent: April 1, 2003Assignee: Kao CorporationInventors: Yasuki Ohtawa, Tohru Katoh, Uichiro Nishimoto, Yoshio Hatayama, Yohei Kaneko
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Publication number: 20030036499Abstract: 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: ApplicationFiled: March 8, 2002Publication date: February 20, 2003Inventors: Yasuki Ohtawa, Takeshi Tomifuji, Akira Sakaguchi, Tohru Katoh
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Patent number: 6521588Abstract: 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: GrantFiled: December 28, 2000Date of Patent: February 18, 2003Assignee: Kao CorporationInventors: Tohru Katoh, Yasuki Ohtawa, Yohei Kaneko
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Patent number: 6410502Abstract: 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: GrantFiled: January 5, 2001Date of Patent: June 25, 2002Assignee: Kao CorporationInventors: Tohru Katoh, Yasuki Ohtawa, Yohei Kaneko