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. 30, 1997
Filed:
Dec. 27, 1995
Yoshitomi Pharmaceutical Industries, Ltd., Osaka, JP;
Abstract
Phosphonite and phosphonate compounds ##STR1## wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are each independently a group of the formula ##STR2## wherein R is a hydrogen atom or a methyl group, p is 0 or 1, q is independently 0 or 1 with regard to each repeat unit, and m is an integer of 2 to 10, a stabilizer for organic materials comprising said compound and a stabilized organic material comprising said compound. The compound of the present invention is less volatile at high temperatures. The use of the compound of the present invention as a stabilizer for organic materials affords an extremely useful organic material which is superior in heat stability and free of degradation caused by oxidation. The compound of the present invention has excellent compatibility with the above-mentioned organic materials and hardly migrate from the organic materials. Thus, the compound of the present invention can reside in the organic material for a prolonged period of time, which in turn stabilizes the organic materials in a sustained manner.