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. 04, 1980
Filed:
Nov. 21, 1977
Applicant:
Inventors:
Heimo Brunetti, Reinach, CH;
Jean Rody, Basel, CH;
Nobuo Soma, Tokyo, JP;
Tomoyuki Kurumada, Tokyo, JP;
Assignees:
Ciba-Geigy Corporation, Ardsley, NY (US);
Sankyo Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
260 / ; 106124 ; 106176 ; 252403 ; 542417 ; 544130 ; 544198 ; 544209 ; 544212 ; 546189 ; 546190 ; 546223 ; 546224 ;
Abstract
Derivatives of sterically hindered 4-aminopiperidines are effective as light-stabilizers for organic polymers, especially for polyolefins. The piperidine ring is substituted with at least five alkyl groups, preferably methyl and ethyl groups. The 4-amino group is substituted with mono- or divalent acyl groups. The nitrogen in 1-position may also be substituted with a monovalent organic substituent. The compounds can be synthesized starting from higher homologs of acetone in sequence of several reaction steps.