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. 24, 2018
Filed:
Apr. 14, 2016
Applicant:
Nova Chemicals (International) S.a., Fribourg, CH;
Inventors:
Assignee:
NOVA Chemicals (International) S.A., Fribourg, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 23/08 (2006.01); C08J 3/22 (2006.01); C08K 5/527 (2006.01); C08L 29/06 (2006.01);
U.S. Cl.
CPC ...
C08L 23/08 (2013.01); C08J 3/226 (2013.01); C08K 5/527 (2013.01); C08L 23/0815 (2013.01); C08L 29/06 (2013.01); C08J 2323/04 (2013.01); C08J 2423/08 (2013.01); C08J 2429/04 (2013.01); C08L 2201/08 (2013.01); C08L 2203/16 (2013.01); C08L 2203/162 (2013.01); C08L 2207/04 (2013.01); C08L 2207/062 (2013.01);
Abstract
Polyethylene is often stabilized with the combination of a primary antioxidant (such as a hindered phenol, a hydroxylamine or a lactone) and a secondary antioxidant (such as a phosphonite, a monophosphite, or a diphosphite). The diphosphite additives are not completely compatible with 'linear' polyethylene. This results in 'blooming' of the diphosphite to the surface of the finished polyethylene part or polyethylene film. The use of a preblend of ethylene vinyl alcohol (EVOH) and diphosphite mitigates this problem.