The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1999
Filed:
Jul. 10, 1997
Applicant:
Inventors:
Satoshi Nishikawa, Shiga-gun, JP;
Shinji Bessho, Suita, JP;
Assignees:
Sunstar Giken Kabushiki Kaisha, Takatsuki, JP;
Uni-Sunstar B.V., Amsterdam, NL;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558447 ; 558450 ;
Abstract
An imporved process for producing tricyanoethylated pentaerythritol by selectively cyanoethylating only three hydroxy groups of pentaerythritol in a high yield such as 90 to 95%, involves reacting one mole of pentaerythritol with three mole of acrylonitrile by Micheal Addition Reaction in an alkaline aqueous solution in coexistence with an extraction solvent. The tricyanoethylated pentaerythritol has a high purity and is useful for production of a high dielectric polymer.