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. 01, 1980
Filed:
Dec. 20, 1978
Gerd Abeler, Griesheim uber Darmstadt, DE;
Rainer Schneider, Bensheim-Auerbach, DE;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Mono- or bistetrazoles of the formula I ##STR1## wherein n is 1 or 2, R.sup.1 represents hydrogen or a monovalent hydrocarbon radical and R represents a monovalent or divalent hydrocarbon radical which can be interrupted by oxygen, NY, sulfur, SO.sub.2 and/or CO.sub.2 or substituted by OH or SH, and wherein Y represents hydrogen or a monovalent hydrocarbon radical. These compounds, especially when used in combination with epoxy plasticizers and/or metal salt stabilizers, are outstanding heat stabilizers for chlorine-containing thermoplastics, especially for PVC. Particular interest attaches to the combinations of tetrazoles with epoxy plasticizers, for example epoxidized soya bean oil, which constitute a metal-free stabilizer system.