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. 23, 2008
Filed:
Jul. 17, 2006
Laura F. Chafin, Bologna, IT;
Walid Al-akhdar, Mobile, AL (US);
Sai Ping Shum, Pleasantville, NY (US);
Stanley J. Padegimas, Mobile, AL (US);
Roswell Easton King, Pleasantville, NY (US);
Laura F. Chafin, Bologna, IT;
Walid Al-Akhdar, Mobile, AL (US);
Sai Ping Shum, Pleasantville, NY (US);
Stanley J. Padegimas, Mobile, AL (US);
Roswell Easton King, Pleasantville, NY (US);
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The present invention discloses a process for stabilizing polyolefin compositions against the deleterious effects of melt processing, heat aging and exposure to combustion products of natural gas, which process comprises incorporating or applying to a polyolefin an effective stabilizing amount of a tris-(mono-alkyl)phenyl phosphite ester of the formula I, or a mixture of phosphite esters of formula I, where each R is the same or different and is straight or branched chain alkyl of from 1 to 8 carbon atoms, and where said phosphite ester or phosphite ester mixture is in the liquid state at 25° C. and 1 atm of pressure. Also disclosed is a stabilized composition comprising polyolefin and a present phosphite ester or phosphite ester mixture as well as certain mixtures of tris-(mono-alkyl)phenyl phosphite. The present liquid phosphite ester stabilizers are especially compatible with low density polyethylene.