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:
Nov. 24, 1998
Filed:
Sep. 30, 1993
Udo Quotschalla, Heppenheim, DE;
Helmut Linhart, Reinach, CH;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The invention relates to a process for stabilizing an organic phosphite or phosphonite or a mixture of organic phosphites or phosphonites against hydrolysis, which comprises adding, as the stabilizer, a compound from the class of sterically hindered amines, so that the stabilized phosphite or phosphonite contains 0.1 to 25% by weight of the amine compound (relative to the phosphite or phosphonite). Compositions comprising organic phosphite or phosphonite and sterically hindered amines are notable for excellent hydrolytic stability and have a long shelf life even at high atmospheric humidity. The products of the process according to the invention are very useful as stabilizers for organic material, in particular organic polymers, for example synthetic polymers, against the damaging influence of heat, oxygen and/or light.