Patents by Inventor Hirosuke Imai

Hirosuke Imai 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: 4342665
    Abstract: This invention provides novel aqueous gel compositions comprising as the essential components one or more surface active agents selected from the group consisting of anionic and nonionic surface active agents, a water-soluble salt of a conjugated diene-maleic acid derivative copolymer, calcium ion and water, and as needed, containing a chelating agent.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: August 3, 1982
    Assignee: Nippon Oil Company, Ltd.
    Inventors: Hiroyuki Itoh, Hirosuke Imai
  • Patent number: 4337062
    Abstract: According to this invention, there is provided an anti-migration agent for dyeing comprising a water-soluble, neutral polymer salt of a polymer anion and at least one cation, said polymer anion being a copolymer or a partially esterified matter thereof, said copolymer consisting of at least one monomer selected from the group consisting of C.sub.4 of C.sub.7 conjugated diene and isobutylene and at least one member selected from the group consisting of maleic acid, maleic anhydride and derivatives thereof, and said cation being selected from the group consisting of Na.sup.+, K.sup.+, Li.sup.+ and ammonium ions represented by the general formula R.sub.1 R.sub.2 R.sub.3 R.sub.4 N.sup.+ wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen, C.sub.1 to C.sub.6 alkyl, cycloalkyl and phenyl.
    Type: Grant
    Filed: November 20, 1980
    Date of Patent: June 29, 1982
    Assignee: Nippon Oil Company, Ltd.
    Inventors: Hirosuke Imai, Teruaki Yamanashi, Hiroyuki Itoh
  • Patent number: 4309324
    Abstract: A process is provided for producing polyhexamethylenimine by condensing hexamethylenediamine at 50.degree. to 300.degree. C. in the presence of a palladium catalyst. The process yields substantially linear, high-molecular-weight polyhexamethylenimines, especially novel polyhexamethylenimines having a molecular weight of at least 1,000. Polyhexamethylenimines having a molecular weight of at least 500 are useful as gelling agents for organic liquids.
    Type: Grant
    Filed: March 4, 1980
    Date of Patent: January 5, 1982
    Assignee: Nippon Oil Company, Ltd.
    Inventors: Hitoshi Yuasa, Hirosuke Imai
  • Patent number: 4216307
    Abstract: A process is provided for producing polyhexamethylenimine by condensing hexamethylenediamine at 50.degree. to 300.degree. C. in the presence of a palladium catalyst. The process yields substantially linear, high-molecular-weight polyhexamethylenimines, especially novel polyhexamethylenimines having a molecular weight of at least 1,000. Polyhexamethylenimines having a molecular weight of at least 500 are useful as gelling agents for organic liquids.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: August 5, 1980
    Assignee: Nippon Oil Company, Ltd.
    Inventors: Hitoshi Yuasa, Hirosuke Imai
  • Patent number: 4170583
    Abstract: A phase-reversible composition is disclosed, which is liquid at a low temperature and solid at a high temperature, the phase being reversible. The composition includes a conjugated diene-maleic acid derivative copolymer having a sulfur containing organic terminal radical of from 4 to 30 carbon atoms, which radical contributes to increased surface-activity and compatibility of the final composition.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: October 9, 1979
    Assignee: Nippon Oil Company Limited
    Inventors: Hiroyuki Itoh, Teruaki Yamanashi, Hirosuke Imai
  • Patent number: 4085263
    Abstract: When a lower polymer of butadiene or a lower copolymer of butadiene with a conjugated diolefin other than butadiene or a vinyl-substituted aromatic comonomer is reacted at 0.degree. to 200.degree. C. in the presence of a combination catalyst including an organic alkali metal compound and a specific diamino compound, the non-conjugated double bonds are effectively isomerized to the conjugated diene double bonds at a very high conversion, and a polymer having a high reactivity, which is useful as a paint vehicle, a thermosetting material, an adhesive, a rubber compounding material and an intermediate for various synthetic reactions, can be obtained.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: April 18, 1978
    Assignee: Nippon Oil Company, Limited
    Inventors: Yutaka Otsuki, Hirosuke Imai, Atsushi Kaiya, Hideo Horji
  • Patent number: 4085265
    Abstract: When a lower polymer of butadiene or a lower copolymer of butadiene with a conjugated diolefin other than butadiene or a vinyl-substituted aromatic comonomer is reacted at 0 to 200.degree. C. in the presence of a combination catalyst including an organic alkali metal compound and a specific diamino compound, the non-conjugated double bonds are effectively isomerized to the conjugated diene double bonds at a very high conversion, and a polymer having a high reactivity, which is useful as a paint vehicle, a thermosetting material, an adhesive, a rubber compounding material and an intermediate for various synthetic reactions, can be obtained.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: April 18, 1978
    Assignee: Nippon Oil Company, Limited
    Inventors: Yutaka Otsuki, Hirosuke Imai, Atsushi Kaiya, Hideo Horii
  • Patent number: 4072646
    Abstract: This invention relates to entirely novel compositions comprisingA. high-molecular anions from dissociation of a part or the whole of the carboxylic group of a conjugated diene-maleic acid derivative copolymer with repeating units represented by the formulae ##STR1## WHEREIN R represents a conjugated diene unit in the copolymer, R' and R" each represent hydrogen or an organic radical having from 1 to 18 carbon atoms and p and q each are an integer;B. one or more cations of alkali metal cations selected from the group consisting of Na.sup.+, K.sup.+ and Li.sup.+ and quaternary ammonium cations represented by the formula R.sub.1 R.sub.2 N.sup.+ R.sub.3 R.sub.4 wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen, alkyl radical of from 1 to 18 carbon atoms, cycloalkyl radical and aryl radical;C. mg.sup.2+ ;D. anion of magnesium compound(s) or alkali metal compound(s) represented by X.sup.n- wherein n is an integer 1 or 2; andE.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: February 7, 1978
    Assignee: Nippon Oil Company, Limited
    Inventors: Hiroyuki Ito, Hirosuke Imai
  • Patent number: 4059555
    Abstract: A water-soluble adhesive comprising a partly alkali metal-modified butadiene-maleic anhydride copolymer wherein the free carboxylic acid groups and the carboxylic acid-alkali metal salt groups are contained in ratios of from 9 : 1 to 2.5 : 7.5; and a process for preparing same.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: November 22, 1977
    Assignee: Nippon Oil Company Ltd.
    Inventors: Hirosuke Imai, Hiroyuki Ito