Patents Assigned to Kabushiki Kaisha Maruto
  • Novel lignin derivatives, molded products using the same and processes for making the same
    Publication number: 20080262182
    Abstract: The present invention provides a process for producing novel lignin derivatives, which comprises using a lignophenol derivative containing a diphenylpropane unit formed by binding a carbon atom at an ortho-position relative to a phenolic hydroxyl group of a phenol derivative to a carbon atom at a benzyl-position of a phenylpropane fundamental unit of lignin, and binding an oxygen atom of the hydroxyl group and a ?-positional carbon atom under alkali conditions under which the hydroxyl group can dissociate, to obtain an arylcoumaran derivative containing an arylcoumaran unit in which a coumaran skeleton is bound to an aromatic ring of lignin.
    Type: Application
    Filed: December 19, 2007
    Publication date: October 23, 2008
    Applicants: KABUSHIKI KAISHA MARUTO, MASAMITSU FUNAOKA
    Inventor: Masamitsu Funaoka
  • Lignin derivatives, molded products using the same and processes for making the same
    Patent number: 7323501
    Abstract: The present invention provides a process for producing novel lignin derivatives, which comprises using a lignophenol derivative containing a diphenylpropane unit formed by binding a carbon atom at an ortho-position relative to a phenolic hydroxyl group of a phenol derivative to a carbon atom at a benzyl-position of a phenylpropane fundamental unit of lignin, and binding an oxygen atom of the hydroxyl group and a ?-positional carbon atom under alkali conditions under which the hydroxyl group can dissociate, to obtain an arylcoumaran derivative containing an arylcoumaran unit in which a coumaran skeleton is bound to an aromatic ring of lignin.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: January 29, 2008
    Assignees: Kabushiki Kaisha Maruto
    Inventor: Masamitsu Funaoka
  • Lignin derivatives, molded products using the same and processes for making the same
    Patent number: 6841660
    Abstract: The present invention provides a process for producing novel lignin derivatives, which comprises using a lignophenol derivative containing a diphenylpropane unit formed by binding a carbon atom at an ortho-position relative to a phenolic hydroxyl group of a phenol derivative to a carbon atom at a benzyl-position of a phenylpropane fundamental unit of lignin, and binding an oxygen atom of the hydroxyl group and a ?-positional carbon atom under alkali conditions under which the hydroxyl group can dissociate, to obtain an arylcoumaran derivative containing an arylcoumaran unit in which a coumaran skeleton is bound to an aromatic ring of lignin.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: January 11, 2005
    Assignees: Kabushiki Kaisha Maruto
    Inventor: Masamitsu Funaoka
  • Lignin derivatives, moldings produced by using the derivative, and process for the preparation thereof
    Patent number: 6632931
    Abstract: The present invention provides a process for producing novel lignin derivatives, which comprises using a lignophenol derivative containing a diphenylpropane unit formed by binding a carbon atom at an ortho-position relative to a phenolic hydroxyl group of a phenol derivative to a carbon atom at a benzyl-position of a phenylpropane fundamental unit of lignin, and binding an oxygen atom of the hydroxyl group and a &bgr;-positional carbon atom under alkali conditions under which the hydroxyl group can dissociate, to obtain an arylcoumaran derivative containing an arylcoumaran unit in which a coumaran skeleton is bound to an aromatic ring of lignin.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: October 14, 2003
    Assignees: Kabushiki Kaisha Maruto, Recruit
    Inventor: Masamitsu Funaoka