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:
Aug. 10, 2004
Filed:
Dec. 07, 2001
Applicant:
Inventor:
Joseph R. Webster, Charlotte, NC (US);
Assignee:
Clariant Finance (BVI) Limited, Tortola, VG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/30 ; C08K 5/34 ; C08K 5/15 ; C08K 5/53 ; C08K 5/09 ;
U.S. Cl.
CPC ...
C08K 3/30 ; C08K 5/34 ; C08K 5/15 ; C08K 5/53 ; C08K 5/09 ;
Abstract
A heat stabilizing composition for polyolefins comprises an oxidized, non-cationized, non-silylated sulfur black pigment, a hindered phenolic antioxidant a sulfur-containing secondary stabilizer, each in stabilizing amount, and a hindered amine. The heat stabilizing composition yields polyolefin compounds and articles having improved long term heat aging stability. Preferably, the sulfur black pigment is treated by washing, to thereby reduce the concentration of soluble sodium salts.