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. 22, 1989
Filed:
Aug. 04, 1988
David J Mitchell, Kingston, CA;
Vaclav G Zboril, Kingston, CA;
Du Pont Canada Inc., Mississauga, CA;
Abstract
A method is disclosed for the reduction of the extractability of trialkanolamines from polyolefins containing such compounds e.g. as a result of the use of trialkanolamines as catalyst deactivators in processes for the polymerization of olefins. Zinc oxide and/or zeolite molecular sieves are incorporated into the polyolefin, either during the process for the manufacture of the polyolefin or subsequent to such manufacture. Zinc oxide may be used in amount of 0.01-4 parts by weight and zeolite molecular sieves in amounts of 0.05-1 parts by weight, per 100 parts of polyolefin. The resultant compositions may be more acceptable for use in the fabrication of articles intended for the packaging of e.g. foodstuffs.