Patents by Inventor Chiaki Tochinai

Chiaki Tochinai 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).

  • Hot melt adhesive containing improved hydrocarbon tackifier resin
    Patent number: 5021499
    Abstract: Hot melt adhesives containing petroleum resin tackifiers which are prepared by a process wherein (1) a C.sub.8 -- and/or C.sub.9 aromatic unsaturated hydrocarbon-containing feed (optionally containing up to 18 wt. % of C.sub.4 or C.sub.5 unsaturated aliphatic hydrocarbons) is first polymerized completely and thereafter a C.sub.5 -aliphatic unsaturated hydrocarbon-containing feed is added, polymerization continued and the reactor effluent stripped to obtain the resin. The order of polymerization may be reversed.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: June 4, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: Chiaki Tochinai, Tadanao Kohara, Sadayoshi Budo, Hiroaki Masuda, Takayoshi Yoshida
  • Adhesive compositions with block copolymer tackifiers
    Patent number: 4845182
    Abstract: Petroleum Resins particularly effective for use as tackifiers for hot melt adhesives and in tackifiers for solvent-based pressure sensitive adhesives are prepared by a processWherein (1) a C.sub.8 - and/or C.sub.9 aromatic unsaturated hydrocarbon-containing feed (optionally containing up to 18 wt. % or C.sub.4 or C.sub.5 unsaturated aliphatic hydrocarbons) is first polymerized completely and thereafter a C.sub.5 -aliphatic unsaturated hydrocarbon-containing feed is added, polymerization continued and the reactor effluent stripped to obtain the resin. The order of polymerization may be reversed.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: July 4, 1989
    Assignee: Exxon Research & Engineering Company
    Inventors: Chiaki Tochinai, Tadanao Kohara, Sadayoshi Budo, Hiroaki Masuda, Takayoshi Yoshida
  • Process for making a block copolymer hydrocarbon resin tackifier
    Patent number: 4757114
    Abstract: Petroleum Resins particularly effective for use as tackifiers for hot melt adhesives and in tackifiers for solvent-based pressure sensitive adhesives are prepared by a processWherein (1) a C.sub.8 - and/or C.sub.9 aromatic unsaturated hydrocarbon-containing feed (optionally containing up to 18 wt. % or C.sub.4 or C.sub.5 unsaturated aliphatic hydrocarbons) is first polymerized completely and thereafter a C.sub.5 -aliphatic unsaturated hydrocarbon-containing feed is added, polymerization continued and the reactor effluent stripped to obtain the resin. The order of polymerization may be reversed.
    Type: Grant
    Filed: November 19, 1985
    Date of Patent: July 12, 1988
    Assignee: Exxon Research & Engineering Co.
    Inventors: Chiaki Tochinai, Tadanao Kohara, Sadayoshi Budo, Hiroaki Masuda, Takayoshi Yoshida