Patents by Inventor Masatoyo Yoshinaka
Masatoyo Yoshinaka 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: 9896528Abstract: There is provided a carboxyl group-containing polymer composition having excellent water solubility and aqueous solution-thickening properties, having a minimal change in viscosity due to the thermal history in a drying step, and having high transparency of a neutral viscous solution obtained by mixing with water. The carboxyl group-containing polymer composition comprises (A) a carboxyl group-containing polymer obtained by copolymerization of an ?,?-unsaturated carboxylic acid (a1) and a compound (a2) having at least two or more ethylenically unsaturated groups per molecule; (B) a polyhydric alcohol fatty acid ester alkylene oxide adduct; and (C) a polyoxyalkylene modified product, which is at least one of an ether (c1) of a polyoxyalkylene with a fatty alcohol, and a polyoxyalkylene fatty acid ester (c2).Type: GrantFiled: October 7, 2015Date of Patent: February 20, 2018Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Satoshi Nishiguchi, Ryosuke Murakami, Shingo Izawa, Masatoyo Yoshinaka
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Publication number: 20170291976Abstract: There is provided a carboxyl group-containing polymer composition having excellent water solubility and aqueous solution-thickening properties, having a minimal change in viscosity due to the thermal history in a drying step, and having high transparency of a neutral viscous solution obtained by mixing with water. The carboxyl group-containing polymer composition comprises (A) a carboxyl group-containing polymer obtained by copolymerization of an ?,?-unsaturated carboxylic acid (a1) and a compound (a2) having at least two or more ethylenically unsaturated groups per molecule; (B) a polyhydric alcohol fatty acid ester alkylene oxide adduct; and (C) a polyoxyalkylene modified product, which is at least one of an ether (c1) of a polyoxyalkylene with a fatty alcohol, and a polyoxyalkylene fatty acid ester (c2).Type: ApplicationFiled: October 7, 2015Publication date: October 12, 2017Applicant: Sumitomo Seika Chemicals Co., Ltd.Inventors: Satoshi NISHIGUCHI, Ryosuke MURAKAMI, Shingo IZAWA, Masatoyo YOSHINAKA
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Patent number: 8629230Abstract: In manufacturing of a carboxyl group-containing water-soluble polymer by a precipitation polymerization method, a method which can improve production efficiency with increasing practicality continuously adds a monomer solution wherein a monomer component containing an ?,?-unsaturated carboxylic acid is dissolved in an inert solvent in a concentration of 20 to 50% by volume to an inert solvent charged in a reaction vessel. In this case, the amount of the inert solvent charged in the reaction vessel is set so that the concentration of the monomer component in the total amount summed up with the monomer solution is 10 to 24% by volume, and the time period until completion of continuous addition of the total amount of the monomer solution is set so that the conversion of the monomer component at the time of completion of addition of the total amount of the monomer solution is 60% or more. The monomer component may contain a polymerizable compound having two or more ethylenically unsaturated groups.Type: GrantFiled: July 27, 2010Date of Patent: January 14, 2014Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Yuichiro Morimitsu, Masayuki Toda, Taro Ashida, Masatoyo Yoshinaka, Shinji Kobayashi
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Patent number: 8377595Abstract: The present invention has its objective to provide a gelling agent for a battery, which forms a paste gel in a short period of time on dissolution in an alkaline electrolyte. The gel has less bubbles and a high gel density. The gelling agent for a battery comprises granular carboxyl group-containing polymer particles having a median particle diameter of 100 to 800 ?m and a bulk density of 0.30 g/ml or more, and has a gel turbidity of 200 ppm or less and a gel density of 1.37 g/ml or more in a gel. The gel is prepared by adding 2 parts by mass of the granular carboxyl group-containing polymer particles to 98 parts by mass of 40% by mass of an aqueous potassium hydroxide solution.Type: GrantFiled: July 9, 2008Date of Patent: February 19, 2013Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Yuichiro Morimitsu, Masatoyo Yoshinaka, Shinji Kobayashi
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Patent number: 8309667Abstract: A water-soluble copolymer having alkyl-modified carboxyl groups which is able to produce a neutralized viscous liquid in which although its viscosity is very low when no electrolyte exists, the viscosity greatly increases when electrolytes are added, which has a high viscosity and a high transmittance and which has moist textures without stickiness even in the presence of a relatively high concentration of electrolytes, and a thickening agent comprising the same.Type: GrantFiled: November 13, 2006Date of Patent: November 13, 2012Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Masatoyo Yoshinaka, Shinji Kobayashi, Yuichiro Morimitsu
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Patent number: 8304517Abstract: An object of the present invention is to provide a method for easily producing granular carboxyl group-containing polymer particles that have a high bulk density and readily swell in water. The present invention provides a method for producing granular carboxyl group-containing polymer particles, which includes: producing carboxyl group-containing polymer particles; preparing an aggregate of the carboxyl group-containing polymer particles by allowing the carboxyl group-containing polymer particles to absorb an polar organic solvent to a liquid content of 5 to 25% by mass; and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.Type: GrantFiled: June 9, 2008Date of Patent: November 6, 2012Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Yuichiro Morimitsu, Masatoyo Yoshinaka, Shinji Kobayashi
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(Meth)acrylic acid/alkyl (meth)acrylate ester copolymer and cosmetic preparation containing the same
Patent number: 8217127Abstract: A (meth)acrylic acid/alkyl (meth)acrylate ester copolymer containing: 95.42 to 97.48% by mass of (meth)acrylic acid; 2.43 to 4.30% by mass of an alkyl (meth)acrylate ester, and 0.08 to 0.30% by mass of a compound having two or more ethylenically unsaturated groups. Use in cosmetics.Type: GrantFiled: December 19, 2008Date of Patent: July 10, 2012Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Masatoyo Yoshinaka, Yuichiro Morimitsu, Shinji Kobayashi, Masaki Kosugi -
Publication number: 20120115038Abstract: A gelling agent capable of turning an electrolyte solution for an alkaline battery into a gel, which is less likely to cause syneresis, is composed of particles of a carboxyl group-containing polymer, and a 0.1% by weight aqueous solution has a viscosity of at least 3,000 mPa·s at a pH of 7. The particles of a carboxyl group-containing polymer are normally obtainable by polymerizing a polymerizable material containing ?,?-unsaturated carboxylic acids, for example, a polymerizable material containing ?,?-unsaturated carboxylic acids and a compound having two or more ethylenically unsaturated groups as a cross-linking agent, in an inert solvent which dissolves the ?,?-unsaturated carboxylic acids but does not dissolve particles of a carboxyl group-containing polymer. The above-mentioned viscosity is achieved by adjusting the balance among the concentration of the ?,?-unsaturated carboxylic acids, the concentration of a cross-linking agent and a polymerization temperature during polymerization.Type: ApplicationFiled: July 12, 2010Publication date: May 10, 2012Inventors: Yuichiro Morimitsu, Masatoyo Yoshinaka, Shinichi Takemori
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Publication number: 20120108776Abstract: In manufacturing of a carboxyl group-containing water-soluble polymer by a precipitation polymerization method, a method which can improve production efficiency with increasing practicality continuously adds a monomer solution wherein a monomer component containing an ?,?-unsaturated carboxylic acid is dissolved in an inert solvent in a concentration of 20 to 50% by volume to an inert solvent charged in a reaction vessel. In this case, the amount of the inert solvent charged in the reaction vessel is set so that the concentration of the monomer component in the total amount summed up with the monomer solution is 10 to 24% by volume, and the time period until completion of continuous addition of the total amount of the monomer solution is set so that the conversion of the monomer component at the time of completion of addition of the total amount of the monomer solution is 60% or more. The monomer component may contain a polymerizable compound having two or more ethylenically unsaturated groups.Type: ApplicationFiled: July 27, 2010Publication date: May 3, 2012Inventors: Yuichiro Morimitsu, Masayuki Toda, Taro Ashida, Masatoyo Yoshinaka, Shinji Kobayashi
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Patent number: 8067517Abstract: A water-soluble copolymer having alkyl-modified carboxyl groups which is able to produce a neutralized viscous liquid in which although its viscosity is very low when no electrolyte exists, the viscosity greatly increases when electrolytes are added, which has a sufficiently high viscosity and a very high transmittance and which has moist textures without stickiness even in the presence of a relatively high concentration of electrolytes, and a thickening agent comprising the same.Type: GrantFiled: November 13, 2006Date of Patent: November 29, 2011Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Masatoyo Yoshinaka, Shinji Kobayashi, Yuichiro Moritmitsu
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Patent number: 7842779Abstract: An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles, which have a high bulk density and readily swell in water. The invention provides a method for producing a granular carboxyl group-containing polymer particle by producing a carboxyl group-containing polymer particle, preparing an aggregate of the carboxyl group-containing polymer particles by providing the carboxyl group-containing particles with moisture so that the carboxyl group-containing polymer particles absorb the moisture in an amount of 5 to 25% by weight and form the aggregate, drying the aggregate of the carboxyl group-containing polymer particles, and then grinding the dried aggregate.Type: GrantFiled: May 1, 2007Date of Patent: November 30, 2010Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Yuichiro Morimitsu, Masatoyo Yoshinaka, Shinji Kobayashi
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(METH)ACRYLIC ACID/ALKYL (METH)ACRYLATE ESTER COPOLYMER AND COSMETIC PREPARATION CONTAINING THE SAME
Publication number: 20100267845Abstract: A (meth)acrylic acid/alkyl (meth)acrylate ester copolymer containing constituents of 95.42 to 97.48% by mass of (meth)acrylic acid, 2.43 to 4.30% by mass of an alkyl (meth)acrylate ester of which alkyl group has 18 to 24 carbon atoms, and 0.08 to 0.30% by mass of a compound having two or more ethylenically unsaturated groups; and cosmetics blended with the copolymer. According to the copolymer of the present invention, a neutral viscous aqueous solution having a high viscosity can be formed even in the presence of an electrolyte in a relatively high concentration, without being affected by its temperature and electrolytic concentration; therefore, the copolymer of the present invention can be suitably used in cosmetics and the like.Type: ApplicationFiled: December 19, 2008Publication date: October 21, 2010Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Masatoyo Yoshinaka, Yuichiro Morimitsu, Shinji Kobayashi, Masaki Kosugi -
Publication number: 20100196763Abstract: The present invention has its object to provide a gelling agent for a battery, which forms a paste gel in a short period of time on dissolution in an alkaline electrolyte. The gel has less bubbles and a high gel density. The present invention is a gelling agent for a battery, which comprises granular carboxyl group-containing polymer particles having a median particle diameter of 100 to 800 ?m and a bulk density of 0.30 g/ml or more, and has a gel turbidity of 200 ppm or less and a gel density of 1.37 g/ml or more in a gel, the gel being prepared by adding 2 parts by mass of the granular carboxyl group-containing polymer particles to 98 parts by mass of 40% by mass of an aqueous potassium hydroxide solution.Type: ApplicationFiled: July 9, 2008Publication date: August 5, 2010Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Yuichiro Morimitsu, Masatoyo Yoshinaka, Shinji Kobayashi
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Publication number: 20100159245Abstract: An object of the present invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. The present invention provides a method for producing granular carboxyl group-containing polymer particles, which includes: producing carboxyl group-containing polymer particles; preparing an aggregate of the carboxyl group-containing polymer particles by allowing the carboxyl group-containing polymer particles to absorb an polar organic solvent to a liquid content of 5 to 25% by mass; and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.Type: ApplicationFiled: June 9, 2008Publication date: June 24, 2010Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Yuichiro Morimitsu, Masatoyo Yoshinaka, Shinji Kobayashi
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Publication number: 20100029901Abstract: An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. The invention provides a method for producing a granular carboxyl group-containing polymer particle which comprises producing a carboxyl group-containing polymer particle, preparing an aggregate of the carboxyl group-containing polymer particles by causing the carboxyl group-containing particles to absorb moisture to a moisture content of 5 to 25% by weight and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.Type: ApplicationFiled: May 1, 2007Publication date: February 4, 2010Inventors: Yuichiro Morimitsu, Masatoyo Yoshinaka, Shinji Kobayashi
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Publication number: 20090292078Abstract: The present invention provide a water-soluble copolymer having alkyl-modified carboxyl groups which is able to produce a neutralized viscous liquid in which although its viscosity is very low when no electrolyte exists, the viscosity greatly increases when electrolytes are added, which has a sufficiently high viscosity and a very high transmittance and which has moist textures without stickiness even in the presence of a relatively high concentration of electrolytes, and a thickening agent comprising the same. More specifically, the present invention proves a water-soluble copolymer having alkyl-modified carboxyl groups which is obtained by polymerizing 100 parts by weight of (meth)acrylic acid, 5-10 parts by weight of lauryl (meth)acrylate, and 0-0.Type: ApplicationFiled: November 13, 2006Publication date: November 26, 2009Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Masatoyo Yoshinaka, Shinji Kobayashi, Yuichiro Morimitsu
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Publication number: 20090227751Abstract: The present invention provide a water-soluble copolymer having alkyl-modified carboxyl groups which is able to produce a neutralized viscous liquid in which although its viscosity is very low when no electrolyte exists, the viscosity greatly increases when electrolytes are added, which has a high viscosity and a high transmittance and which has moist textures without stickiness even in the presence of a relatively high concentration of electrolytes, and a thickening agent comprising the same. More specifically, the present invention provides a water-soluble copolymer having alkyl-modified carboxyl groups which is obtained by polymerizing 100 parts by weight of (meth)acrylic acid, 0.5-5 parts by weight of alkyl (meth)acrylate comprising an alkyl group having a carbon number of 18-24, and 0-0.1 parts by weight of a compound having two or more of ethylenic unsaturated groups, wherein a 1 weight %-neutralized viscous liquid shows a viscosity of 1500 mPa·s or lower and a transmittance of 90% or higher, and when 0.Type: ApplicationFiled: November 13, 2006Publication date: September 10, 2009Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Masatoyo Yoshinaka, Shinji Kobayashi, Yuichiro Morimitsu
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Patent number: 7521517Abstract: A first object of the present invention is to provide a method for producing a carboxyl group-containing water-soluble polymer capable of giving neutralized viscous solutions excellent in thickening effect even when the aqueous solutions of the carboxyl group-containing water-soluble polymer have a low concentration. A second object of the invention is to provide a method for producing a carboxyl group-containing water-soluble polymer capable of giving neutralized viscous solutions excellent in thickening effect at low concentration levels and, at the same time, capable of being dispersed and dissolved in water at high concentrations with ease.Type: GrantFiled: July 27, 2005Date of Patent: April 21, 2009Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Shinji Kobayashi, Masatoyo Yoshinaka, Yuichiro Morimitsu
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Patent number: 7390865Abstract: A process for preparing a water-soluble carboxyl group-containing polymer comprising reacting an ?,?-unsaturated carboxylic acid with a compound having at least two ethylenically unsaturated groups in an inert solvent in the presence of a radical polymerization initiator, the process for preparing a water-soluble carboxyl group-containing polymer being characterized in that the ?,?-unsaturated carboxylic acid is further added to a reaction mixture in which 20 to 70% by mol of an unreacted ?,?-unsaturated carboxylic acid remains, and the ?,?-unsaturated carboxylic acid is reacted with the compound having at least two ethylenically unsaturated groups; and a water-soluble carboxyl group-containing polymer obtainable by the above-mentioned process, wherein the reducing ratio of viscosity of a 0.2% by weight neutralized viscous liquid is less than 25%, and the equilibrium viscosity of the neutralized viscous liquid is 20000 to 50000 mPa·s.Type: GrantFiled: March 10, 2003Date of Patent: June 24, 2008Assignee: Sumitomo Seika Chemicals Co., Ltd.Inventors: Shigeki Hamamoto, Masatoyo Yoshinaka
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Publication number: 20070225522Abstract: A first object of the present invention is to provide a method for producing a carboxyl group-containing water-soluble polymer capable of giving neutralized viscous solutions excellent in thickening effect even when the aqueous solutions of the carboxyl group-containing water-soluble polymer have a low concentration. A second object of the invention is to provide a method for producing a carboxyl group-containing water-soluble polymer capable of giving neutralized viscous solutions excellent in thickening effect at low concentration levels and, at the same time, capable of being dispersed and dissolved in water at high concentrations with ease.Type: ApplicationFiled: July 27, 2005Publication date: September 27, 2007Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Shinji Kobayashi, Masatoyo Yoshinaka, Yuichiro Morimitsu