David P Walsh

Address:

118 Pemberton Ct, North Wales, PA 19454

Phone:

(215)3935042

VIN:

JTEBU5JRXC5103680

Make:

TOYOTA

Model:

4RUNNER

Year:

2012

US Patent:

7544742, Jun 9, 2009

Filed:

Nov 30, 2006

Appl. No.:

11/606558

Inventors:

David J. Walsh - Chadds Ford PA, US

Assignee:

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

International Classification:

C08G 73/02
C09D 5/18

US Classification:

525185, 26421112, 428411, 428412, 4284235, 4284744, 4284749, 4284755, 4284758, 4284761, 524387

Abstract:

Disclosed are polyamide potassium ionomer polyol compositions that have antistatic properties. Also disclosed are articles, including laminates and monolayer or multilayer structures comprising such compositions to which neither powders nor dusts easily adhere electrostatically.

US Patent:

7655731, Feb 2, 2010

Filed:

Aug 18, 2006

Appl. No.:

11/506553

Inventors:

David J. Walsh - Chadds Ford PA, US

Assignee:

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

International Classification:

C08L 23/22
C08L 31/04

US Classification:

525222, 525 93, 525192, 525240, 525232, 525227

Abstract:

Disclosed are soft polymer compositions comprising an ethylene/alkyl (meth)acrylate copolymer and a crystalline polyolefin, such as polypropylene homopolymers or polypropylene copolymers, wherein the ethylene/alkyl (meth)acrylate copolymer has a higher melt viscosity than the polyolefin. Also disclosed are such compositions modified by materials that improve the scratch-and-mar properties of the blends, the preparation and use of these compositions in such processes as extrusion and injection molding, and articles made from these compositions.

US Patent:

8013067, Sep 6, 2011

Filed:

Jul 30, 2004

Appl. No.:

10/903090

Inventors:

Herbert Vernon Bendler - Wilmington DE, US
Chun Sing Wong - Kingston, CA
David J. Walsh - Chadds Ford PA, US

Assignee:

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

International Classification:

C08L 67/02

US Classification:

525176, 525165

Abstract:

A curable thermoplastic elastomeric blend comprising: (a) from 15 to 60 weight percent of a polyalkylene phthalate polyester polymer or copolymer and; (b) from 40 to 85 weight percent of a poly(meth)acrylate or polyethylene/alkyl (meth)acrylate rubber in combination with an effective amount of peroxide free-radical initiator and an organic multiolefinic coagent to cross-link which upon extrusion or injection molding dynamically cross-link producing a melt processible thermoplastic elastomeric composition having a polyalkylene phthalate polyester polymer or copolymer continuous phase and of a cross-linked polyacrylate or polyethylene/acrylate rubber dispersed phase. Such compositions are useful in the manufacture of rubber parts having excellent resistance to lubricating oils and greases.

US Patent:

8242209, Aug 14, 2012

Filed:

Jan 23, 2009

Appl. No.:

12/358944

Inventors:

Charles John Talkowski - Hockessin DE, US
Karlheinz Hausmann - Auvernier, CH
David J. Walsh - Chadds Ford PA, US

Assignee:

E I du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 8/00

US Classification:

525176, 525165, 525366, 525437, 525445

Abstract:

A composition is disclosed which comprises a mixture of a poly(trimethylene terephthalate) polymer composition, a nucleating agent, and an ethylene copolymer. Also disclosed in a method for reducing the melt viscosity of nucleated poly(trimethylene terephthalate) polymer composition.

US Patent:

8497326, Jul 30, 2013

Filed:

Sep 9, 2008

Appl. No.:

12/207258

Inventors:

Kazuyuki Nakata - Hockessin DE, US
David J. Walsh - Chadds Ford PA, US

Assignee:

E I du Pont de Nemours and Company - Wilmington DE

International Classification:

B32B 27/00
C08F 20/04
C08L 29/04

US Classification:

5253306, 528500, 260DIG 20, 524910, 524394

Abstract:

Disclosed are ionomer compositions neutralized by a combination of cesium and potassium that have antistatic properties. Also disclosed are articles, including laminates and monolayer or multilayer structures comprising such compositions to which neither powders nor dusts easily adhere electrostatically.

US Patent:

7267884, Sep 11, 2007

Filed:

Mar 4, 2005

Appl. No.:

11/072387

Inventors:

Richard T. Chou - Hockessin DE, US
Loic Pierre Rolland - Divonne les Bains, FR
Sam Louis Samuels - Landenberg PA, US
David J. Walsh - Chadds Ford PA, US

Assignee:

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

International Classification:

C08L 5/00
C08L 77/00
C08L 77/06
B32B 27/34

US Classification:

4284744, 428 98, 428357, 428364, 4284755, 428910, 442181, 442199, 442304, 442327, 525183

Abstract:

Disclosed are films, tapes, and melt-spun fibers comprising or prepared from a composition comprising (a) at least one polyamide polymer; and (b) from about 0. 1 to 20 weight % of at least one ethylene copolymer such as ethylene/vinyl acetate dipolymers, ethylene/vinyl acetate terpolymers, ethylene/alkyl (meth)acrylate dipolymers, ethylene/alkyl (meth)acrylate terpolymers, functionalized ethylene copolymers, ethylene/acid copolymers, and salts thereof. The films, tapes and fibers exhibit improved tensile properties such as tensile strength and elongation at break compared to nonmodified polyamide compositions. Also disclosed are nonwoven textiles comprising or prepared from the oriented melt-spun fibers.

US Patent:

20060267774, Nov 30, 2006

Filed:

Mar 24, 2006

Appl. No.:

11/388861

Inventors:

Stewart Feinberg - Exton PA, US
John Chen - Hockessin DE, US
David Walsh - Chadds Ford PA, US

International Classification:

G08B 13/14

US Classification:

340572800

Abstract:

An overmolded transponder is at least partially overmolded with an overmolding composition comprising an ethylene copolymer. The overmolding composition may optionally comprise one or both of a second polymer such as polyethylene or a filler. The overmolded transponder can serve as a radio frequency identification device, for example, such as a bolus transponder for identification of animals.

US Patent:

20070149707, Jun 28, 2007

Filed:

Feb 13, 2004

Appl. No.:

10/557886

Inventors:

Kazuyuki Nakata - Ichihara-shi, JP
Norihiko Sato - Funabashi-shi, JP
Toshiyuki Maeda - Ichihara-shi, JP
David Walsh - Chadds Ford PA, US
Herbert Bendler - Wilmington DE, US

Assignee:

Du Pont-Mitsui Polychemicals Co., Ltd. - Minato-ku

International Classification:

C08F 8/00

US Classification:

525192000

Abstract:

A partially cross-linked polymer composition obtainable by dynamically heat-treating: 95 to 50% by weight of a resin (A) comprising an ethylene copolymer containing 5 to 48% by weight of units derived from at least one monomer selected from vinyl acetate, (meth)acrylic acid, (meth)acrylate ester, glycidyl (meth)acrylate and carbon monoxide, and 5 to 50% by weight of a resin (B) having a melt viscosity (JAI 7-1991) at 180 C. of over 10,000 mPaEs and comprising a two or more-component propylene copolymer containing 0.1 to 20% by mol of units derived from α-olefins other than propylene, or a blend of the two or more-component propylene copolymer and a propylene homopolymer in the presence of an organic peroxide (C) in an amount of from 0.001 to 4 parts by weight based on 100 parts by weight of the total amount of the resins (A) and (B). A process for producing the polymer compositions is also provided.