Randal Lewis Perry

US Patent:

20100093878, Apr 15, 2010

Filed:

Dec 29, 2008

Appl. No.:

12/344768

Inventors:

ZHEN-YU YANG - Hockessin DE, US
Amy Qi Han - , US
Mark Gerrit Roelofs - Hockessin DE, US
Randal L. Perry - Hockessin DE, US

Assignee:

E.I. DU PONT DE NEMOURS AND COMPANY - Wilmington DE

International Classification:

C08J 5/20
C08F 28/02
C08F 214/18
C08F 24/00
B05D 5/12

US Classification:

521 27, 526286, 526254, 526270, 427115

Abstract:

Crosslinkable fluoropolymers and crosslinked fluoropolymers prepared from select fluorinated monomers by dimerization and trimerization. Also disclosed are proton conductive membranes of these crosslinked fluoropolymers.

US Patent:

20130245219, Sep 19, 2013

Filed:

Dec 20, 2011

Appl. No.:

13/989149

Inventors:

Randal L. Perry - Hockessin DE, US
Mark Gerrit Roelofs - Earleville MD, US
Robert Clayton Wheland - Wilmington DE, US
Ralph Munson Aten - Chadds Ford PA, US

Assignee:

E I Du Pont de Nemours and Company - Wilimington DE

International Classification:

C08F 14/18

US Classification:

526243

Abstract:

This invention relates to ionomers and to ionically conductive compositions formed therefrom. The ionomers comprise polymerized units of monomers A and monomers B, wherein monomers A are perfluoro dioxole or perfluoro dioxolane monomers, and the monomers B are functionalized perfluoro olefins having fluoroalkyl sulfonyl, fluoroalkyl sulfonate or fluoroalkyl sulfonic acid pendant groups, CF═CF(O)[CF]SOX. The ionically conductive compositions of the invention are useful in fuel cells, electrolysis cells, ion exchange membranes, sensors, electrochemical capacitors, and modified electrodes.

US Patent:

20130252134, Sep 26, 2013

Filed:

Dec 20, 2011

Appl. No.:

13/991437

Inventors:

Masayoshi Takami - Shizuoka-ken, JP
Toshihiko Yoshida - Saitama-Ken, JP
Masanori Aimu - Shizuoka-Ken, JP
Randal Lewis Perry - Hockessin DE, US
Mark Gerrit Roelofs - Earlevillle MD, US
Robert Clayton Wheland - Wilmington DE, US
Ralph Munson Aten - Chadds Ford PA, US

Assignee:

Toyota Jidosha Kabushiki Kaisha - Toyota--shi, Aichi
EI Du Pont De Nemours and Company and - Wilmington

International Classification:

H01M 8/10

US Classification:

429482, 427115, 521 38

Abstract:

This invention relates to solid polymer electrolyte materials for use in one or more electrode of a fuel cell. The solid polymer electrolyte materials comprise one or more ionomer which comprises polymerized units of monomers A and monomers B, wherein monomers A are perfluoro dioxole or perfluoro dioxolane monomers, and the monomers B are functionalized perfluoro olefins having fluoroalkyl sulfonyl, fluoroalkyl sulfonate or fluoroalkyl sulfonic acid pendant groups, CF═CF(O)[CF]SOX. The ionomer of the solid polymer electrolyte material has a number average molecular weight, Mn, of greater than 140,000. Specifically, the ionomers of the invention may find use in the catalyst layer of an electrode because the high molecular weight ionomers mitigate the formation of cracks in the catalyst layer.

US Patent:

20130253157, Sep 26, 2013

Filed:

Dec 20, 2011

Appl. No.:

13/991266

Inventors:

Masayoshi Takami - Shizuoka-ken, JP
Toshihiko Yoshida - Saitama-Ken, JP
Misaki Kobayashi - Aichi-Ken, JP
Randal Lewis Perry - Hockessin DE, US
Mark Gerrit Roelofs - Earleville MD, US
Robert Clayton Wheland - Wilmington DE, US
Ralph Munson Aten - Chadds Ford PA, US

Assignee:

E I DU PONT DE NEMOURS AND COMPANY AND TOYOTA JIDOSHA KABUSHIKI KAISHA - Toyota-shi, Aichi

International Classification:

H01M 8/10

US Classification:

526270

Abstract:

This invention relates to solid polymer electrolyte materials for use in one or more electrode of a fuel cell. The solid polymer electrolyte materials comprise one or more ionomer which comprises polymerized units of monomers A and monomers B, wherein monomers A are perfluoro dioxole or perfluoro dioxolane monomers, and the monomers B are functionalized perfluoro olefins having fluoroalkyl sulfonyl, fluoroalkyl sulfonate or fluoroalkyl sulfonic acid pendant groups,

US Patent:

50948954, Mar 10, 1992

Filed:

Apr 19, 1990

Appl. No.:

7/511110

Inventors:

Phillip A. Branca - Newark DE
Daniel E. Hubis - Elkton MD
Robert S. Mallouk - Chadds Ford PA
Randal L. Perry - Wilmington DE

International Classification:

B32B 108
B32B 2708

US Classification:

428 3691

Abstract:

A composite, porous, liquid-permeable article is provided which is a multilayer structure of discrete, bonded layers of porous, expanded polytetrafluoroethylene (EPTFE), which composite has its interior and exterior surfaces coated with a perfluoro ion exchange polymer to render the composite hydrophilic so as to resist gas locking in aqueous media wherein a composite diaphragm made therefrom, may also contain a water-soluble surfactant to assist in initial water penetration into the pores of the composite whereby an improved electrolytic cell is provided having the composite diaphragm as the porous separator in the electrolysis of alkali halide solutions and wherein the diaphragm is also useful as an improved filter medium.

US Patent:

49543881, Sep 4, 1990

Filed:

Nov 30, 1988

Appl. No.:

7/278224

Inventors:

Robert S. Mallouk - Chadds Ford PA
Phillip A. Branca - Newark DE
Randal L. Perry - Wilmington DE

International Classification:

B32B 2714

US Classification:

428198

Abstract:

An abrasion-resistant, tear-resistant, multilayer composite membrane, useful in electrolysis, is provided comprising a continuous perfluoro ion exchange polymer film attached to a reinforcing fabric by means of a porous, expanded polytetrafluoroethylene (EPTFE) interlayer. The fabric and EPTFE are rendered hydrophilic and non-gas-locking by coating the interior and exterior surfaces thereof with a perfluoro ion exchange resin of equivalent weight less than 1000. The composite preferably is treated with an ionic perfluoro surfactant. Also provided is a multilayer composite according to the above in which the continuous perfluoro ion exchange film is itself a multilayer construction of a perfluorosulfonate polymer and a thin layer of perfluorocarboxylate polymer in which the perfluorosulfonate polymer interfaces with the EPTFE and the interior and exterior surfaces of the EPTFE and fabric are coated with perfluorosulfonate polymer. Also provided are a method of making the composites and methods of use for these fabric reinforced thin membrane structures as separators in electrolytic cells, and as selective barriers in permeation separation and facilitated transport operations.

US Patent:

51835452, Feb 2, 1993

Filed:

Nov 15, 1991

Appl. No.:

7/792665

Inventors:

Phillip A. Branca - Newark DE
Daniel E. Hubis - Elkton MD
Robert S. Mallouk - Chadds Ford PA
Randal L. Perry - Wilmington DE

International Classification:

C25C 1302
C25C 1308
C25C 900

US Classification:

204252

Abstract:

A composite, porous, liquid-permeable article is provided which is a multilayer structure of discrete, bonded layers of porous, expanded polytetrafluoroethylene (EPTFE). The composite has its interior and exterior surfaces coated with a perfluoro ion exchange polymer to render the composite hydrophilic so as to resist gas locking in aqueous media. Initially, the diaphragm may also contain a water-soluble surfactant to assist in initial water penetration into the pores of the composite. An improved electrolytic cell is provided having the composite diaphragm as the porous separator in the electrolysis of alkali halide solutions. The diaphragm is also useful as an improved filter medium.

US Patent:

50824724, Jan 21, 1992

Filed:

Nov 5, 1990

Appl. No.:

7/608907

Inventors:

Robert S. Mallouk - Chadds Ford PA
Phillip A. Branca - Hockessin DE
Randal L. Perry - Fayetteville NC

International Classification:

B01D 5322
B01D 7136

US Classification:

55 16

Abstract:

A dimensionally stable, composite membrane of a microporous film in laminar contact with a continuous perfluoro ion exchange resin layer is provided. The composite membrane comprises a continuous perfluoro ion exchange polymer layer which has an original, as-prepared, length, width and thickness, the ion exchange polymer layer being in laminar attachment to a film of a microporous material, preferably porous, expanded polytetrafluoroethylene (EPTFE), the microporous film having essentially the same length and width as the as-prepared continuous perfluoro ion exchange layer. The perfluoro ion exchange layer is swollen with a hydrophilic liquid to an extent that the hydrophilic liquid exceeds 20% by weight of the swollen, continuous perfluoro ion exchange layer. The swollen ion exchange layer exhibits less than a 5% increase in either length or width from its original, as-prepared, state, but it exhibits a substantial increase in thickness over its original, as-prepared, state. The method of use of a dimensionally stable, expanded polytetrafluoroethylene (EPTFE) and perfluoro ion exchange resin composite membrane in a facilitated transport unit operation is also provided, the composite membrane comprising a continuous perfluoro ion exchange polymer layer in laminar attachment to a film of porous EPTFE, the perfluoro ion exchange layer being swollen with a hydrophilic liquid.