Clay B Jones

US Patent:

7754287, Jul 13, 2010

Filed:

May 18, 2007

Appl. No.:

11/804547

Inventors:

Robert John Cavanaugh - Cincinnati OH, US
Clay Woodward Jones - Washington WV, US

Assignee:

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

International Classification:

B05D 3/02

US Classification:

427384, 4273855, 4273881, 4273884

Abstract:

The present invention provides a process for making a filled fluoropolymer bearing comprising providing an aqueous fluoropolymer dispersion comprising fluoropolymer particles and anionic polyelectrolyte dispersing agent in an amount sufficient for stabilization. The dispersion contains less than about 300 ppm fluorosurfactant based on the weight of the dispersion. The dispersion is coagulated to make a mush and a bearing filler is added to the dispersion prior to or after making the mush. The mush containing bearing filler is applied onto a bearing substrate to produce a coated substrate which is sintered and formed into a bearing.

US Patent:

7871673, Jan 18, 2011

Filed:

Jun 2, 2010

Appl. No.:

12/791906

Inventors:

Robert John Cavanaugh - Cincinnati OH, US
Clay Woodward Jones - Fort Collins CO, US

Assignee:

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

International Classification:

B05D 3/02

US Classification:

427384, 4273855, 4273881, 4273884

Abstract:

The present invention provides a process for making a filled fluoropolymer bearing comprising providing an aqueous fluoropolymer dispersion comprising fluoropolymer particles and anionic polyelectrolyte dispersing agent in an amount sufficient for stabilization. The dispersion contains less than about 300 ppm fluorosurfactant based on the weight of the dispersion. The dispersion is coagulated to make a mush and a bearing filler is added to the dispersion prior to or after making the mush. The mush containing bearing filler is applied onto a bearing substrate to produce a coated substrate which is sintered and formed into a bearing.

US Patent:

7914853, Mar 29, 2011

Filed:

Jun 2, 2010

Appl. No.:

12/791911

Inventors:

Robert John Cavanaugh - Cincinnati OH, US
Clay Woodward Jones - Fort Collins CO, US

Assignee:

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

International Classification:

B05D 3/02

US Classification:

427384, 4273855

Abstract:

The present invention provides a process for making a filled fluoropolymer bearing comprising providing an aqueous fluoropolymer dispersion comprising fluoropolymer particles and anionic polyelectrolyte dispersing agent in an amount sufficient for stabilization. The dispersion contains less than about 300 ppm fluorosurfactant based on the weight of the dispersion. The dispersion is coagulated to make a mush and a bearing filler is added to the dispersion prior to or after making the mush. The mush containing bearing filler is applied onto a bearing substrate to produce a coated substrate which is sintered and formed into a bearing.

US Patent:

7931942, Apr 26, 2011

Filed:

Jun 2, 2010

Appl. No.:

12/791909

Inventors:

Robert John Cavanaugh - Cincinnati OH, US
Clay Woodward Jones - Fort Collins CO, US

Assignee:

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

International Classification:

B05D 3/02

US Classification:

427384, 4273855

Abstract:

The present invention provides a process for making a filled fluoropolymer bearing comprising providing an aqueous fluoropolymer dispersion comprising fluoropolymer particles and anionic polyelectrolyte dispersing agent in an amount sufficient for stabilization. The dispersion contains less than about 300 ppm fluorosurfactant based on the weight of the dispersion. The dispersion is coagulated to make a mush and a bearing filler is added to the dispersion prior to or after making the mush. The mush containing bearing filler is applied onto a bearing substrate to produce a coated substrate which is sintered and formed into a bearing.

US Patent:

20070282044, Dec 6, 2007

Filed:

May 18, 2007

Appl. No.:

11/804529

Inventors:

Robert John Cavanaugh - Cincinnati OH, US
Clay Woodward Jones - Washington WV, US

International Classification:

D06P 1/52
C09B 67/00

US Classification:

524244, 524544, 524502

Abstract:

An aqueous fluoropolymer dispersion comprising fluoropolymer particles having an average particle size of about 10 to about 400 nm. The dispersion has a solids content of at least about 35 to about 70 wt % and comprises about 0.03 wt % to about 10 wt % anionic polyelectrolyte dispersing agent based on the weight of fluoropolymer solids. The dispersion has a Gel Time of at least about 100 seconds.