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. 25, 1989
Filed:
Aug. 12, 1987
Applicant:
Inventors:
Ronald E MacLeay, Williamsville, NY (US);
Robert T Kazmierczak, Williamsville, NY (US);
Assignee:
Pennwalt Corporation, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524 99 ; 524103 ; 546187 ; 546200 ; 546208 ; 546242 ; 546244 ; 546245 ; 546247 ;
Abstract
Amic acids, cyclic imides and mixtures thereof which contain both diacyl hydrazide functionalities and hindered amine functionalities are prepared by reacting non-halogenated cyclic anhydrides with hindered amine light stabilizers containing reactive hydrazido funtionalities in inert solvents or in inert polymeric compositions in a melt blending step. The compositions protect polymeric compositions against the degradative effects of heat and light.