Dow Corning Corporation

Hydrogenics Corporation

Myron T Maxson

Chi-long Lee

Lawrence Frisch

David Frank

Joseph Cargnelli

Howard Stimson Travis

William Gordon Bradford

Brian Jeffery Swanton

James A Rabe

Bernard Vanwert

Janet L Elias

Gary R Homan

Michael Raymond Strong

Shizhong Zhang

Kent R Larson

Cecil L Frye

Lawrence Joseph Rapson

Donnie Ray Juen

Ann Walstrom Norris

Diane Marie Kosal

Paul L Brown

Khristopher Edward Alvarez

James Anderson Beck

Lawrence D Fiedler

Roger G Chaffee

Leo F Stebleton

Christine J Schoenherr

Louis H Toporcer

Beth Ann Witucki

Kathleen F Benditt

Roger Allen Frazer

Randall Allen Herring

Brian Jeffrey Swanton

Lee Walter Miller

Paul Thomas Irish

Floyd A Bergstrom

A sealing technique is provided for forming complex and multiple seal configurations for fuel cells and other electrochemical cells. To provide a seal, for sealing chambers for oxidant, fuel and/or coolant, a groove network is provided extending through the various elements of the fuel cell assembly. A source of seal material is then connected to an external filling port and injected into the groove network, and the seal material is then cured to form the seal. There is thus formed a 'seal in place', that is robust and can accommodate variations in tolerances and dimensions, and that can be bonded, where possible, to individual elements of the fuel cell assembly. This avoids the difficulty, labor intensive cost and complexity of manually assembling many individual gaskets into complex groove shapes and the like. The seal material can be selected to be comparable with a wide variety of gases, liquid coolants and the like.

Apparatus for and method of forming seals in fuel cells and fuel stacks

Apparatus for and method of forming seals in fuel cells and fuel cell stacks

This is an improvement in a fuel cell stack assembly having a plurality of plates with grooves for accommodating gaskets to provide seals between individual fuel cell plates in the fuel cell stack assembly in order to prevent leakage of gases and liquids required for operation of the fuel cell stack assembly. The improvement comprising grooves in each fuel cell plate in the fuel cell stack assembly with a circular or an elliptical profile, and a unitary seal formed of a sealing material between each fuel cell plate in the fuel cell stack assembly having a profile corresponding to the profile of the grooves in each fuel cell plate.

Seals for fuel cells and fuel cell stacks

Polyorganosiloxane gels are prepared using compositions curable by a platinum catalyzed hydrosilation reaction that are characterized by the presence of a non-functional silicone fluid. The gel may contain additional components and may also be formulated into a multi-part system.

Routes to dielectric gel for protection of electronic modules

Organosiloxane compositions that cure in the presence of ultraviolet radiation comprise a alkenyl-substituted fluorinated polyorganosiloxane, a mercaptoalkyl-substituted fluorinated polyorganosiloxane and a photoinitiator. The cured compositions are particularly useful as coating and encapsulants to protect electronic devices that are exposed to hydrocarbon fuels.

Radiation curable fluorinated organosiloxane compositions

A silicone gel product that resists fuel adsorption and has a surface that feels smooth and dry, resists dirt and moisture pick-up, and prevents the product from sticking to itself, comprises a silicone gel with a tacky surface and a fluorocarbon elastomer film adhering to the surface of the silicone gel.

Protective coating for silicone gels

A high-consistency organosiloxane composition comprising fluorinated and non-fluorinated polyorganosiloxanes, which upon the addition of suitable cure components can be cured to form elastomers having improved tear strength and good resistance to hydrocarbon oil weep. The present composition comprises a reinforcing silica filler that has been treated with a tetraalkyldisilazane.

High tear strength high consistency organosiloxane compositions

The present invention is a curable fluorosilicone composition having improved lubricity, low compression set, and good resistance to fluids such as automotive fuel without post-curing. The composition comprises

Curable fluorosilicone composition having improved lubricity

A method for controlling cure initiation and curing time of a platinum group metal curable fluorosilicone composition. The method comprises in a platinum group metal curable fluorosilicone composition comprising a cross-linker mixture comprising an alkylhydrogensiloxane and a dialkylhydrogen perfluoroalkylethylsiloxane controlling the weight ratio of the alkylhydrogensiloxane to dialkylhydrogen perfluoroalkylethylsiloxane in the mixture within a range of about 0.1:1 to 9:1 to control the cure initiation and curing time of the composition.

Method for controlling cure initiation and curing times of platinum

A room temperature curable organosiloxane composition, containing an alkenyl-containing polyorganosiloxane, an organohydrogensiloxane, a platinum catalyst, a methylvinylcyclosiloxane and an acetylenic alcohol, which exhibits a long working time and a fast cure time.

Fast curing organosiloxane compositions with long working times

A method for making a fluorinated polydiorganosiloxane base composition and the composition prepared thereby. The base composition can be addition cured using a platinum-metal group catalyst and an organohydrogensiloxane crosslinker to form a fluorosilicone elastomer having improved resiliency and compression set properties.

Fluorinated polydiorganosiloxane base composition and method for

The compatibility between high consistency fluorinated and non-fluorinated polydiorganosiloxanes is increased, with a resultant increase in the physical-properties of elastomers prepared from mixtures of these polymers, by blending the polymers together with a reinforcing silica filler that is reacted with both fluorinated and non-fluorinated liquid polydiorganosiloxanes as filler treating agents. The high consistency polydiorganosiloxanes contain at least two alkenyl radicals per molecule and are cured by a hydrosilation reaction.

High consistency organosiloxane compositions comprising fluorinated and

The amount of solvent-extractable materials present in organosiloxane gels cured by a platinum-catalyzed hydrosilylation reaction can be reduced without sacrificing other desirable properties the gels when the curable composition used to prepare the gel comprise a first polydiorganosiloxane with vinyl or other ethylenically unsaturated hydrocarbon radicals only at the terminal positions, a second polydiorganosiloxane with silicon bonded hydrogen atoms only at the terminal positions and a crosslinking reactant containing at least three alkenyl radicals or silicon-bonded hydrogen atoms per molecule. The number of silicon-bonded hydrogen atoms or alkenyl radicals in excess of 2 per molecule of crosslinking reactant constitute from 10 to 30 percent of these reactive groups present in the curable composition.

Curable organosiloxane gel compositions

Growing community of inventors

Midland, MI, United States of America

Myron T Maxson