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. 14, 1998
Filed:
Nov. 27, 1995
Robert Leslie Hudson, Roswell, GA (US);
Mary Lucille DeLucia, Roswell, GA (US);
Kimberly-Clark Worldwide, Inc., Neenah, WI (US);
Abstract
A method of improving the effectiveness of a photostabilizer in reducing the deleterious effects of actinic radiation on a polypropylene composition, which method involves compounding a melt-extrudable thermoplastic polypropylene composition having a melt flow rate in a range of from about 18 to about 100 g/10 minutes at a temperature of 230.degree. C. and a load of 2.16 kg. The polypropylene composition includes a first thermoplastic polypropylene having a melt flow rate lower than 18 g/10 minutes at a temperature of 230.degree. C. and a load of 2.16 kg, a polydispersity greater than about 2.6, and a Z-average molecular weight greater than about 300,000; a second thermoplastic polypropylene having a melt flow rate higher than 18 g/10 minutes at a temperature of 230.degree. C. and a load of 2.16 kg, a polydispersity equal to or less than 2.6, and a Z-average molecular weight equal to or less than 300,000 as determined by gel permeation chromatography; and a photostabilizer. The weight ratio of the first polypropylene to the second polypropylene is in a range of from about 95:5 to about 10:90.