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:
Feb. 15, 2005
Filed:
Aug. 22, 2002
Kimberly M. Mcloughlin, Gibsonia, PA (US);
Edwin B. Townsend, Iv, Pittsburgh, PA (US);
John A. Boettger, Monroeville, PA (US);
Gary R. Tarr, Burgettstown, PA (US);
Theodore Gabor, Pittsburgh, PA (US);
Kimberly M. McLoughlin, Gibsonia, PA (US);
Edwin B. Townsend, IV, Pittsburgh, PA (US);
John A. Boettger, Monroeville, PA (US);
Gary R. Tarr, Burgettstown, PA (US);
Theodore Gabor, Pittsburgh, PA (US);
Sunoco, Inc. (R&M), Philadelphia, PA (US);
Abstract
A process is provided for the production of a very low melt viscosity (high melt flow index) polymer resin, suitable for use in meltblown processing. According to the process of the current invention, a high melt viscosity (low melt flow index) resin is subjected to post-reactor molecular weight alteration by extrusion with a chemical prodegradant. The process produces a very low melt viscosity resin that can be used in meltblown processing without further treatment to reduce the average molecular weight of the resin. Further, the very low melt viscosity resins produced according to the process of the current invention contain very little or no residual prodegradant.