Walter T Krakowiak from 1601 Sycamore St, Wilmington, DE 19805, age 81, Phone: 3026584570

High Build Dispersions
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US Patent:

7619039, Nov 17, 2009
Filed:

Apr 19, 2006
Appl. No.:

11/407166
Inventors:

Clay Woodward Jones - Washington WV, US
Robert John Cavanaugh - Cincinnati OH, US
Walter Thomas Krakowiak - Wilmington DE, US
Richard A. Morgan - Vienna WV, US
Theodore A. Treat - Washington WV, US
Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE
International Classification:

C08F 259/00
C08F 259/10
C08L 43/00
US Classification:

525276, 524535, 526242
Abstract:

An aqueous dispersion of non-melt-processible fluoropolymer, process for making same and concentrated dispersion and powder obtained from the dispersion. The fluoropolymer particles of the dispersion have a standard specific gravity (SSG) of less than 2. 225 and comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. At least about 1. 5 weight % of the fluoropolymer particles comprise substantially rod-shaped particles having a length to diameter ratio greater than about 5.

High Build Dispersions
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US Patent:

20030008944, Jan 9, 2003
Filed:

Mar 13, 2002
Appl. No.:

10/099192
Inventors:

Clay Jones - Washington WV, US
Robert Cavanaugh - Hilton Head Island SC, US
Walter Krakowiak - Wilmington DE, US
Richard Morgan - Vienna WV, US
Theodore Treat - Washington WV, US
International Classification:

C08F002/00
C08G002/00
C08L083/00
C08F259/00
US Classification:

523/201000
Abstract:

An aqueous dispersion of non-melt-processible fluoropolymer, process for making same and concentrated dispersion and powder obtained from the dispersion. The fluoropolymer particles of the dispersion have a standard specific gravity (SSG) of less than 2.225 and comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. At least about 1.5 weight % of the fluoropolymer particles comprise substantially rod-shaped particles having a length to diameter ratio greater than about 5.

Core-Shell Fluoropolymer Dispersions
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US Patent:

20030129400, Jul 10, 2003
Filed:

Mar 13, 2002
Appl. No.:

10/098803
Inventors:

Clay Jones - Washington WV, US
Walter Krakowiak - Wilmington DE, US
International Classification:

B32B005/16
US Classification:

428/402000, 428/421000
Abstract:

A dispersion of non-melt-processible fluoropolymer particles having an SSG of less than about 2.225 in aqueous medium. The fluoropolymer particles comprise a core of high molecular weight polytetrafluoroethylene having an average melt creep viscosity greater than about 1.5×10Pas and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. The shell has an average melt creep viscosity greater than about 9×10Pas and comprises about 5 to about 30% by weight of the particles. The fluoropolymer in the dispersion of the invention is fibrillating.