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:
Mar. 01, 1994
Filed:
Sep. 12, 1991
Applicant:
Inventors:
Norimitsu Numadate, Misawa, JP;
Isao Nakamae, Hirakata, JP;
Hiroki Yamamoto, Niihama, JP;
Manji Sasaki, Nishinomiya, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ; C07D / ;
U.S. Cl.
CPC ...
264141 ; 2331 / ; 264140 ; 252401 ; 252403 ; 546188 ; 546190 ;
Abstract
A process for producing granules of a 2,2,6,6-tetramethylpiperidine-containing light stabilizer, which comprises mixing a 2,2,6,6-tetramethylpiperidine-containing light stabilizer having a melting point of not less than 60.degree. C. with a lubricant selected from the group consisting of water and an aqueous solution of an alcohol having 1 to 4 carbon atoms, and granulating the resultant mixture while pressure is applied thereto. The granular light stabilizer product has low dusting property and excellent free-flowing property.