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:
Jan. 21, 2020
Filed:
Jul. 28, 2016
Applicant:
Jfe Chemical Corporation, Tokyo, JP;
Inventor:
Kazuya Takemura, Chiba, JP;
Assignee:
JFE CHEMICAL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 61/02 (2006.01); C08L 61/14 (2006.01); C08G 61/08 (2006.01); B01J 31/08 (2006.01);
U.S. Cl.
CPC ...
C08L 61/14 (2013.01); C08G 61/08 (2013.01); B01J 31/08 (2013.01);
Abstract
A method for producing a dicyclopentadiene-modified phenolic resin. The method including reusing a fluorine-based ion-exchange resin as a catalyst in a reaction between a phenol and a dicyclopentadiene, the fluorine-based ion-exchange resin having been used as a catalyst when a phenol and a dicyclopentadiene are allowed to react with each other to produce a first dicyclopentadiene-modified phenolic resin. In the method, the fluorine-based ion-exchange resin is washed with an organic solvent. The dicyclopentadiene-modified phenolic resin obtained by the method has a stable quality, has a high purity, and is inexpensive.