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. 01, 1983
Filed:
Apr. 21, 1981
Applicant:
Inventors:
Akira Miyamoto, Hiratsuka, JP;
Masayoshi Maeda, Nishinomiya, JP;
Yoshitaka Yamagishi, Hiratsuka, JP;
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08J / ;
U.S. Cl.
CPC ...
525472 ; 528495 ; 528499 ; 528500 ;
Abstract
A modified aromatic hydrocarbon resin is prepared by reacting an aromatic hydrocarbon-formaldehyde resin with an unsaturated polybasic acid or an anhydride thereof, if desired, together with a saturated polybasic acid or an anhydride thereof, while making water or water and an aliphatic alcohol present in the reaction system and removing the formaldehyde formed by the reaction. The cured product has a good mechanical strength and a high resistance to water and alkalis.