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:
Jul. 01, 1980
Filed:
Nov. 17, 1978
Applicant:
Inventors:
Assignees:
Ciba-Geigy Corporation, Ardsley, NY (US);
Sankyo Company, Limited, Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C08K / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 526265 ; 528 28 ; 528 38 ; 546 14 ;
Abstract
4-Siloxy derivatives of sterically hindered piperidines are effective light-stabilizers for plastics. These compounds have at least five alkyl groups in the ring positions 2, 3, 5 and 6 and four alkyl groups in ring positions 2 and 6, preferably methyl and ethyl groups. The ring nitrogen may be unsubstituted or substituted with a monovalent organic residue. The new compounds can be synthesized by O-silylation of 4-hydroxy-polyalkylpiperidines, preferably by reaction with chlorosilanes.