Jon T Howell

US Patent:

6528457, Mar 4, 2003

Filed:

Jun 28, 2001

Appl. No.:

09/894112

Inventors:

Jon L. Howell - Bear DE
H. Carl Walther - Landenberg PA
Gregory A. Bell - New Castle DE

Assignee:

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

International Classification:

C10M10554

US Classification:

508180, 508136, 508148, 508155, 508165, 508181, 508182, 508183, 508206, 508208, 508421, 508435, 508464, 508527, 508552, 508582

Abstract:

A composition that can be used as lubricant for high electric field including spark plug boots is disclosed. The composition comprises, or is produced by combining, a halogenated oil such as a perfluoropolyether, a polytrichlorofluoroethylene, a fluorosilicone, or combinations of two or more thereof; a basic thickener; and optionally an additional thickener in which the basic thickener is a metal hydroxide, a metal salt, an ammonium salt, or combinations of two or more thereof. The optional additional thickener is polytetrafluoroethylene, talc, silica, clay, boron nitride, metal soaps, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof. Also provided is a spark plug boot that comprises the composition applied thereto.

US Patent:

6559108, May 6, 2003

Filed:

Nov 15, 2000

Appl. No.:

09/712891

Inventors:

Jon Lee Howell - Bear DE
David Gareth Vaughan Jones - Wheaton IL
Anthony Joseph Huffmann - Chicago IL
Norm V. Gitis - Cupertino CA
Charles Gao - Fremont CA

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE
Burmah Castrol Trading, Ltd. - Wiltshire

International Classification:

C10M14704

US Classification:

508427, 508588, 428422

Abstract:

A recording medium comprising a phosphorus-containing fluorocarbon compound is provided. The phosphorus-containing fluorocarbon compound can be used as lubricant or as an additive to a lubricant. The phosphorus-containing fluorocarbon compound can be an esterified aryl phosphorus compound, a salt thereof, or combinations thereof.

US Patent:

6653511, Nov 25, 2003

Filed:

Sep 9, 2002

Appl. No.:

10/237345

Inventors:

Jon L. Howell - Bear DE
Erik W. Perez - Middletown DE
Alfred Waterfeld - Tuscaloosa AL
Chadron Mark Friesen - Langley, GB
Joseph Stuart Thrasher - Tuscaloosa AL
Ireneusz Nowak - Provo UT

Assignee:

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

International Classification:

C07C 4311

US Classification:

568615, 568591, 568614, 568604, 568685, 424 7837, 424 7808

Abstract:

A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.

US Patent:

6753301, Jun 22, 2004

Filed:

Jul 10, 2001

Appl. No.:

09/901975

Inventors:

Jon L. Howell - Bear DE
Erik William Perez - Pennsauken NJ
Alfred Waterfeld - Tuscaloosa AL
Chadron Mark Friesen - Langley, CA
Joseph Stuart Thrasher - Tuscaloosa AL

Assignee:

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

International Classification:

C10M14700

US Classification:

508582, 252380, 568615

Abstract:

A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups. The process for producing the perfluoropolyether can comprise (1) contacting a perfluoro acid halide, a C - to C -substituted ethyl epoxide, or a C fluoroketone with a metal halide to produce an alkoxide; (2) contacting the alkoxide with either hexafluoropropylene oxide or tetrafluorooxetane to produce a second acid halide; (3) esterifying the second acid halide to an ester; (4) reducing the ester to its corresponding alcohol; (5) converting the alcohol with a base to a salt form; (6) contacting the salt form with a C or higher olefin to produce a fluoropolyether; and (7) fluorinating the fluoropolyether. The process for improving the thermostability of a grease or lubricant comprises combining the grease or lubricant with the composition.

US Patent:

6828284, Dec 7, 2004

Filed:

Aug 6, 2001

Appl. No.:

09/923838

Inventors:

Jon Lee Howell - Bear DE
Erik William Perez - Pennsauken NJ

Assignee:

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

International Classification:

C10M13100

US Classification:

508182, 508423, 508429, 508431, 508433, 508441, 558177, 558183, 558203, 558204, 428422

Abstract:

A composition that is or comprises a phosphorus-, perfluoropolyether-, and perfluoroalkyl-containing compound is provided. The compound comprises either (i) mono- or polyalkylene oxide linking groups between the phosphorus and the fluorocarbon group, or (ii) no linking group between the phosphorus and fluorocarbon group, or (iii) individual mixtures of (i) and (ii); and the fluorocarbon group can be the perfluoropolyether or perfluoroalkyl group. The compound can also be a partially esterified phosphate, a partially esterified phosphonate, a salt of a partially esterified phosphate, a salt of a partially esterified phosphonate, or mixtures of two or more thereof.

US Patent:

7148385, Dec 12, 2006

Filed:

Jul 25, 2003

Appl. No.:

10/626972

Inventors:

Jon L. Howell - Bear DE, US
Erik W. Perez - Middletown DE, US
Alfred Waterfeld - Tuscaloosa AL, US
Chadron Mark Friesen - Langley, CA
Joseph Stuart Thrasher - Tuscaloosa AL, US
Ireneusz Nowak - Provo UT, US

Assignee:

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

International Classification:

C07C 43/11

US Classification:

568615, 568604, 568614, 568591, 5253264

Abstract:

A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.

US Patent:

7232932, Jun 19, 2007

Filed:

Mar 30, 2004

Appl. No.:

10/813525

Inventors:

Jon L. Howell - Bear DE, US
Erik William Perez - Pennsauken NJ, US
Alfred Waterfeld - Tuscaloosa AL, US
Chadron Mark Friesen - Langley, CA
Joseph Stuart Thrasher - Tuscaloosa AL, US

Assignee:

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

International Classification:

C43C 43/12
C08F 8/00

US Classification:

568615, 524404

Abstract:

A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups. The process for producing the perfluoropolyether can comprise (1) contacting a perfluoro acid halide, a C-to C-substituted ethyl epoxide, or a C fluoroketone with a metal halide to produce an alkoxide; (2) contacting the alkoxide with either hexafluoropropylene oxide or tetrafluorooxetane to produce a second acid halide; (3) esterifying the second acid halide to an ester; (4) reducing the ester to its corresponding alcohol; (5) converting the alcohol with a base to a salt form; (6) contacting the salt form with a Cor higher olefin to produce a fluoropolyether; and (7) fluorinating the fluoropolyether. The process for improving the thermostability of a grease or lubricant comprises combining the grease or lubricant with the composition.

US Patent:

7285673, Oct 23, 2007

Filed:

Jun 27, 2005

Appl. No.:

11/167805

Inventors:

Jon Lee Howell - Bear DE, US
Kevin Anthony Hay - Langley CA, US

Assignee:

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

International Classification:

C07F 9/70
C07F 9/90
C07F 9/94

US Classification:

556 70, 568 16

Abstract:

A process to prepare substituted aryl pnictogen derivatives comprising contacting a fluoropolyether or fluoroalkyl primary bromide or iodide, with a pnictogen derivative such as triaryl phosphine, triaryl arsine, or triaryl stibine or triaryl phosphine oxide, triaryl arsine oxide or triaryl stibine oxide, to produce the corresponding fluoropolyether- or fluoroalkyl-substituted aryl phosphine oxide, aryl arsine oxide or aryl stibine oxide; and optionally, contacting the oxide product with a reducing agent to form the corresponding substituted aryl phosphine, arsine or stibine.