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:
Apr. 20, 1982
Filed:
Jul. 22, 1980
Applicant:
Inventors:
Assignee:
Sumitomo Chemical Company, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546166 ; 546165 ; 546181 ; 260800 ; 524 86 ;
Abstract
2,2,4-Trimethyl-1,2-dihydroquinoline polymer containing 25% by weight or more of the dimer is effectively prepared by the polymerization of 2,2,4-trimethyl-1,2-dihydroquinoline monomer in the presence of hydrochloric acid, the concentration of hydrochloric acid being from 15 to 25% by weight, and the amount of hydrochloric acid being 0.2 to 0.5 mole per mole of the total of the monomer and impurity amines contained in the monomer. The polymer is useful as an antioxidant for rubber.
Kojima, Takashi. (1982). Manufacture of polymerized 2,2,4-trimethyl-1,2-dihydroquinoline (U.S. Patent No. 4326062). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4326062
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile