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:
Dec. 10, 1991
Filed:
Jul. 30, 1990
Applicant:
Inventor:
Peter Flury, Himmelried, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
558 86 ;
Abstract
Compounds of the general formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen, C.sub.1 -C.sub.6 alkyl, or phenyl or naphthyl, each unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, R.sub.3 and R.sub.4 are each independently of the other hydrogen or C.sub.1 -C.sub.4 alkyl, with the proviso that R.sub.3 and R.sub.4 may not simultaneously be hydrogen, and R.sub.5 is hydrogen, C.sub.1 -C.sub.6 alkyl, or phenyl or naphthyl, each unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, and X is oxygen or sulfur, are very suitable flame retardants for polymers.