Patents by Inventor Kunio Hanauye

Kunio Hanauye 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).

  • Process for production of phenolic resin from bisphenol-A by-products
    Patent number: 4337334
    Abstract: A process for producing a phenolic resin comprising condensing a phenol component and an aldehyde component, characterized in that the phenol component comprises (high-molecular-weight phenolic compounds which are left after bisphenol A-containing by-products formed in the production of bisphenol A by condensing acetone and phenol in the presence of an acid catalyst are treated at a high temperature of at least 150.degree. C. in the presence of an alkaline catalyst to remove low-boiling components therefrom.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: June 29, 1982
    Assignee: Mitsui Toatsu Chemicals Inc.
    Inventors: Yoshiro Shimizu, Toshio Itakura, Mitsuhiro Iwasa, Kunio Hanauye
  • Laminates prepared from resol-type phenol resins
    Patent number: 4179429
    Abstract: A new resol-type phenol resin is described which is obtained by heat-reacting isopropenylphenol oligomer as partial or whole phenol component of the resin with an aldehyde in the presence of a basic catalyst. Varnishes are obtained by adding a suitable vehicle to the resin. Laminates manufactured by impregnating a base with the phenol resin and heating the impregnated base to cure the resin are obtained with superior mechanical and electrical characteristics.
    Type: Grant
    Filed: January 19, 1978
    Date of Patent: December 18, 1979
    Assignee: Mitsui Toatsu Chemicals Incorporated
    Inventors: Kunio Hanauye, Tsutomu Takase, Yoshio Morimoto
  • Method for producing 2,6-di-tert.-butyl-4-cumyl phenol
    Patent number: 3933928
    Abstract: 2,6-DI-TERT.-BUTYL-4-CUMYL PHENOL IS PRODUCED BY REACTING P-CUMYL PHENOL WITH ISOBUTYLENE, AT A REACTION TEMPERATURE OF FROM 40.degree. TO 120.degree.C. in the presence of from 0.01 to 20% by weight of p-toluene sulfonic acid based on the weight of the p-cumyl phenol. Isobutylene is charged into the reaction system at a high rate and is always present in the reaction system during the reaction. A substantially 100% conversion of p-cumyl phenol is attained and the weight ratio of 2,6-di-tert.-butyl-4-cumyl phenol/2-tert.-butyl-4-cumyl phenol in the reaction product is greater than 10, while splitting off of the cumyl group at the para position is suppressed.
    Type: Grant
    Filed: August 21, 1974
    Date of Patent: January 20, 1976
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Kunio Hanauye, Tsutomu Takase, Mitsuhiro Iwasa, Mizuo Ito