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. 29, 1980
Filed:
Feb. 22, 1978
Argus Chemical Corporation, Brooklyn, NY (US);
Abstract
A novel process is provided for preparing 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone), comprising forming a novel 2-hydroxy-4-alkoxy-5-aminomethylbenzophenone by a reaction of a 2-hydroxy-4-alkoxybenzophenone with an amine and formaldehyde, and causing the 2-hydroxy-4-alkoxy-5-aminomethylbenzophenone to react with a 2-hydroxy-4-alkoxybenzophenone or to dimerize. Both the aminomethylhydroxyalkoxybenzophenone and the methylenebis (2-hydroxy-4-alkoxybenzophenone) which are prepared according to this invention are useful to prevent photo-degradation of organic materials, particularly as light stabilizers for synthetic resins.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile