Patents Assigned to TOSOH ORGANIC CHEMICAL CO., LTD.
  • Patent number: 10010879
    Abstract: Provided are: a polymer-supported phosphane compound exhibiting excellent catalytic reaction activity; a complex including the compound and a transition metal; and a catalyst including the complex. This polymer compound includes: units of threefold styrene cross-linked phosphane; and styrene units having substituent groups (R) in position 4 (provided that R represents hydrogen, a C1-6 lower alkyl group, a C1-6 lower alkoxy group, or a polar functional group). In the formula in which the polymer compound includes structure (1), PS represents a polystyrene unit chain including the styrene units having the substituent groups (R). The complex includes the polymer and a transition metal. The catalyst for an organic compound coupling reaction includes the complex.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: July 3, 2018
    Assignee: Tosoh Organic Chemical Co., Ltd
    Inventors: Masaya Sawamura, Tomohiro Iwai, Tomoya Harada
  • Patent number: 9505713
    Abstract: Provided are high purity sodium p-styrenesulfonate with an excellent hue which is useful as a reactive emulsifier or dispersant for producing a polymer emulsion, or synthetic starch for clothing ironing and poly(sodium p-styrene-sulfonate) with an excellent hue using the same or sodium p-styrenesulfonate improved in fluidity while keeping good solubility. An aqueous p-?-bromoethylbenzenesulfonic acid solution and an aqueous sodium hydroxide solution are reacted under specific conditions to control the particle size, thereby obtaining sodium p-styrenesulfonate particles improved in a balance between fluidity and solubility, and further, impurities such as isomers are reduced, thereby obtaining high-purity sodium p-styrenesulfonate with an excellent hue.
    Type: Grant
    Filed: September 2, 2013
    Date of Patent: November 29, 2016
    Assignee: TOSOH ORGANIC CHEMICAL CO., LTD
    Inventors: Shinji Ozoe, Kenichi Yamanoi, Hideaki Matsunaga
  • Publication number: 20150246876
    Abstract: Provided are high purity sodium p-styrenesulfonate with an excellent hue which is useful as a reactive emulsifier or dispersant for producing a polymer emulsion, or synthetic starch for clothing ironing and poly(sodium p-styrene-sulfonate) with an excellent hue using the same or sodium p-styrenesulfonate improved in fluidity while keeping good solubility. An aqueous p-?-bromoethylbenzenesulfonic acid solution and an aqueous sodium hydroxide solution are reacted under specific conditions to control the particle size, thereby obtaining sodium p-styrenesulfonate particles improved in a balance between fluidity and solubility, and further, impurities such as isomers are reduced, thereby obtaining high-purity sodium p-styrenesulfonate with an excellent hue.
    Type: Application
    Filed: September 2, 2013
    Publication date: September 3, 2015
    Applicant: TOSOH ORGANIC CHEMICAL CO., LTD.
    Inventors: Shinji Ozoe, Kenichi Yamanoi, Hideaki Matsunaga