Thomas P Ford

US Patent:

6489386, Dec 3, 2002

Filed:

Aug 9, 2000

Appl. No.:

09/634288

Inventors:

Irene Greenwald Plotzker - Wilmington DE
Thomas Michael Ford - Greenville DE
Kenneth George Sharp - Landenberg PA
Samuel Tacitus DArcangelis - Randolph NJ

Assignee:

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

International Classification:

C08K 509

US Classification:

524291, 524222

Abstract:

A polymer composition and method for reducing the permeability of gases through molded polymeric containers and films by incorporating into the polymer from which the container or film is formed an effective amount of a barrier-enhancing additive, such as monoesters of hydroxybenzoic acid and hydroxynaphthoic acid.

US Patent:

7005395, Feb 28, 2006

Filed:

Dec 12, 2002

Appl. No.:

10/317416

Inventors:

Dimitri P. Zafiroglu - Wilmington DE, US
Geoffrey David Hietpas - Newark DE, US
Debora Flanagan Massouda - Wilmington DE, US
Thomas Michael Ford - Greenville DE, US

Assignee:

Invista North America S.a.r.l. - Wilmington DE

International Classification:

D04H 1/006
B32B 5/026
B32B 3/006

US Classification:

442352, 442401, 442360, 442362, 442381, 442382, 428103, 156 85

Abstract:

This invention relates to an improved method for preparing stretchable multiple-component bonded composite sheets which involves bonding a fibrous layer of spirally-crimpable multiple-component continuous filaments or staple fibers to one or more non-spirally-crimpable layers using an array of intermittent mechanical, chemical, or thermal bonds, and heating the bonded composite to activate the spiral crimp of the fibers in the spirally-crimpable layer. Multi-layer nonwoven fabrics prepared according to the method of the current invention have an improved combination of strength, aesthetics, stretch-recovery properties, and textile hand and drape compared to multiple-component nonwoven fabrics known in the art.

US Patent:

7036197, May 2, 2006

Filed:

Dec 13, 2002

Appl. No.:

10/318466

Inventors:

Dimitri P. Zafiroglu - Wilmington DE, US
Geoffrey David Hietpas - Newark DE, US
Debora Flanagan Massouda - Wilmington DE, US
Thomas Michael Ford - Greenville DE, US

Assignee:

Invista North America S.A.R.L. - Wilmington DE

International Classification:

D03D 15/04
D01D 5/22
D04H 13/00
D02G 3/00

US Classification:

28156, 264168, 264155, 442352, 442361, 428369, 428371, 428373

Abstract:

A method for preparing stretchable bonded nonwoven fabrics which involves forming a substantially nonbonded nonwoven web of multiple-component continuous filaments or staple fibers which are capable of developing three-dimensional spiral crimp, activating the spiral crimp by heating substantially nonbonded web under free shrinkage conditions during which the nonwoven remains substantially nonbonded, followed by bonding the crimped nonwoven web using an array of discrete mechanical, chemical, or thermal bonds. Nonwoven fabrics prepared according to the method of the current invention have an improved combination of stretch-recovery properties, textile hand and drape compared to multiple-component nonwoven fabrics known in the art.

US Patent:

8252706, Aug 28, 2012

Filed:

Mar 1, 2006

Appl. No.:

11/364912

Inventors:

Dimitri P. Zafiroglu - Wilmington DE, US
Geoffrey D. Hietpas - Wilmington DE, US
Debora Flanagan Massouda - Wilmington DE, US
Thomas Michael Ford - Wilmington DE, US

Assignee:

INVISTA North America S.àr.l. - Wilmington DE

International Classification:

D04H 1/00
D04H 3/00
D04H 5/00

US Classification:

442361, 442362, 442363, 442364, 428377, 428371

Abstract:

A method for preparing stretchable bonded nonwoven fabrics which involves forming a substantially nonbonded nonwoven web of multiple-component continuous filaments or staple fibers which are capable of developing three-dimensional spiral crimp, activating the spiral crimp by heating substantially nonbonded web under free shrinkage conditions during which the nonwoven remains substantially nonbonded, followed by bonding the crimped nonwoven web using an array of discrete mechanical, chemical, or thermal bonds. Nonwoven fabrics prepared according to the method of the current invention have an improved combination of stretch-recovery properties, textile hand and drape compared to multiple-component nonwoven fabrics known in the art.

US Patent:

52350312, Aug 10, 1993

Filed:

Mar 13, 1992

Appl. No.:

7/815107

Inventors:

Neville E. Drysdale - Newark DE
Thomas M. Ford - Greenville DE
Stephan J. McLain - Wilmington DE

Assignee:

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

International Classification:

C08G 6384
C08G 6391

US Classification:

528354

Abstract:

A process for polymerizing lactide and up to 20 mole percent of another lactone in the absence of solvent at 100. degree. to 220. degree. C. using an yttrium or lanthanide series rare earth metal catalyst.

US Patent:

52082970, May 4, 1993

Filed:

Dec 30, 1991

Appl. No.:

7/814135

Inventors:

Thomas M. Ford - Greenville DE
Stephan J. McLain - Wilmington DE

Assignee:

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

International Classification:

C08G 6384
C08G 6391

US Classification:

525415

Abstract:

A process for polymerizing lactide and up to 20 mole percent of another lactone is disclosed. The cayalysts used have the formula MZ. sub. 3 wherein M is scandium, yttrium, bismuth, a lanthanide series rare earth metal or a mixture thereof and the Zs are independantly the same or different highly coordinating ligands. The preferred metals M are lanthanum, cerium, praseodymium and neodymium with lanthanum being especially preferred. The preferred ligands are betadiketones, betaketoesters and malonate anions with the beta diketones such as 2,2,6,6-tetramethyl-3,5-heptanedionates being especially preferred.

US Patent:

52081311, May 4, 1993

Filed:

Jan 10, 1992

Appl. No.:

7/820012

Inventors:

Thomas C. Felder - Wilmington DE
Thomas M. Ford - Greenville DE

Assignee:

DXIMaging - Lionville PA

International Classification:

G03G 908

US Classification:

430115

Abstract:

Electrostatic liquid developer consisting essentially of (A) nonpolar liquid having Kauri-butanol value less than 30, present in major amount, (B) particles, average by area particle size of less than 10. mu. m, of a degradable polymeric resin as defined, and (C) nonpolar liquid soluble ionic or zwitterionic charge director compound. Optionally a colorant and an adjuvant compound are present. Process of preparation of electrostatic liquid developers is described. The developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists. The developer particles can be readily removed from the printed material, such as paper, by degradation of the polymer. If the polymeric resin is depolymerized, the monomer and low molecular weight units can be recycled by being repolymerized, or discarded in a landfill as a biodegradable environmentally benign by-product.

US Patent:

48270415, May 2, 1989

Filed:

Mar 10, 1988

Appl. No.:

7/166485

Inventors:

Thomas M. Ford - Greenville DE
Enio Kumpinsky - Wilmington DE
Antonio Vidal - Wilmington DE

Assignee:

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

International Classification:

C07C 4546

US Classification:

568322

Abstract:

A process for manufacturing 1,4-bis(4-phenoxybenzoyl)benzene, wehrein diphenyl ether is contacted for about 30-360 minutes at 130. degree. -200. degree. C. with 1,4-benzenedicarbonyl chloride in respective mole ratios of about 15-80:1 in the presence of a fluorocarbon resin carrying pendant sulfonic acid groups, the weight ratio of the resin to 1,4-benzenedicarbonyl chloride being 3:1-1:2; the hot solution is separated from the resin, and the crystalline product is recovered from the solution on cooling. The so obtained 1,4-bis(4-phenoxybenzoyl)-benzene is a high purity material free of ortho-isomer and catalyst contamination and can be used without further purification as one of the starting materials in the preparation of polyetherketones, which are important engineering resins.