Patent application number | Description | Published |
20090000732 | Bonded Fuel Cell Assembly, Methods, Systems and Sealant Compositions for Producing the Same - A fuel cell, having improved sealing against leakage, includes a sealant disposed over the peripheral portions a membrane electrode assembly such that the cured sealant penetrates a gas diffusion layer of the membrane electrode assembly. The sealant is applied through liquid injection molding techniques to form cured sealant composition at the peripheral portions of the membrane electrode assembly. The sealant may be thermally cured at low temperatures, for example 130° C. or less, or may be cured at room temperature through the application of actinic radiation. The sealant may be a one-part or a two-part sealant. The sealant includes a polymerizable material, such as a polymerizable monomer, oligomer, telechelic polymer, functional polymer and combinations thereof functionalized with a group selected from epoxy, allyl, vinyl, (meth)acrylate, imide, amide, urethane and combinations thereof. Useful fuel cell components to be bonded include a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof. | 01-01-2009 |
20090004541 | Uv-Curable Fuel Cell Sealants and Fuel Cells Formed Therefrom - A fuel cell, having improved sealing against leakage, includes a fuel cell component having a cured sealant, wherein the cured sealant includes a telechelic-functional polyisobutylene, an organhydrogenosilane crosslinker, a platinum catalyst and a photoinitiator. The fuel cell component may be a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof. A method for forming such a fuel cell includes the steps of providing a fuel cell component including a substrate; providing a mold having a cavity; positioning the mold so that the cavity is in fluid communication with the substrate; applying a curable liquid sealant composition into the cavity, wherein the curable sealant composition includes a telechelic-functional polyisobutylene, an organhydrogenosilane crosslinker, a platinum catalyst and a photoinitiator; and curing the composition with actinic radiation. | 01-01-2009 |
20090012202 | Acrylated Urethanes, Processes for Making the Same and Curable Compositions Including the Same - The present invention is directed to acrylated urethanes including the reaction product of: (1)(a) at least one urethane having at least two isocyanate groups and at least one acrylate group; and (b) at least one alcohol compound having at least two hydroxyl groups; or (2) (a) at least one isocyanate functional urethane which is the reaction product of at least one alcohol compound selected from the group consisting of amino alcohols, thioether alcohols, phosphino alcohols and mixtures thereof and at least one polyisocyanate; and (b) at least one hydroxy-functional material having at least one acrylate group; curable compositions including the same and processes for making the same. | 01-08-2009 |
20090018239 | UNDERFILL ADHESIVES - In accordance with the present invention, it has now been found that glycidyl epoxy resins containing substitution on the epoxide ring can be used with conventional epoxy curing agents and fluxing agents to produce underfill adhesives that are suitable for use with silver-based alloys. Owing to the structural similarity of the new materials to conventional epoxy resins, physical and material properties of the invention formulations are altered little, if at all, relative to products currently in use, and so are highly compatible with existing processes. | 01-15-2009 |
20090030106 | Photosensitive Compounds, Photopolymerizable Compositions Including the Same, and Methods of Making and Using the Same - The present invention is directed to reaction products prepared from at least one Michael addition donor material including two or more active methylene hydrogens; and at least one material capable of reacting with a Michael addition donor, the material having one Michael addition acceptor and at least one functional group selected from the group consisting of hydroxy, hydroxyalkyl, vinyl ether, amino, aminoalkyl, carboxy, carboxyalkyl, cyano, and cyanoalkyl groups; or reaction products prepared from (a) at least one Michael addition donor material comprising at least one Michael Addition donor group selected from the group consisting of cyano functional groups and phosphono functional groups; and (b) at least one material capable of reacting with the at least one Michael addition donor group, the material having at least one Michael addition acceptor, wherein the above reaction products are capable of forming free radicals upon exposure to actinic radiation; as well as compositions, and processes for making and using the same. | 01-29-2009 |
20100105795 | Liquid Stable Thiol-Acrylate/Vinyl Ether Compositions - The present invention relates to liquid stable thiol-acrylate and thiol-vinyl ether compositions. More particularly, in accordance with some embodiments, the compositions may include a (meth)acrylate, a thiol component, an organic acid stabilizer, and a curing initiator. In other embodiments, the compositions may include a curable component selected from a (meth)acrylate, vinyl ether and/or alkenyl ether, a reactive diluent having vinyl ether and acrylate functionality, a thiol component and a stabilizer selected from an organic acid, a hemiacetal ester derivative of an organic acid and/or a phenol acetal. | 04-29-2010 |
20100212824 | Photocurable Elastomer Compositions - The present invention relates to photocurable elastomer compositions and methods of preparation and use of such compositions for cure-in-place applications such as gaskets. The curable compositions generally include an elastomer component, a monofunctional and/or multifunctional reactant and a photoinitiator that in various aspects may be a visible and/or UV curing initiator. The various components may be present in different amounts, depending on the combination of components and composition desired. | 08-26-2010 |
20110060157 | APPARATUS AND METHODS FOR CONTROLLED RADICAL POLYMERIZATION - A method of conducting controlled radical polymerization, including: (a) providing a mixture of at least one monomer; at least one monomer solvent; at least one compound metal coordinating capable; and at least one initiator; (b) directing the mixture at a rate over a solid catalyst surface contained in an external chamber to the vessel, the catalyst including a metal or metal compound capable of at least two oxidation states; (c) monitoring the reaction vessel temperature; (d) adjusting the flow rate when the temperature is outside a selected temperature range; and (e) allowing the polymerization to proceed to desired conversion level. | 03-10-2011 |
20110272095 | FAST,CURING TWO PART ANAEROBIC ADHESIVE COMPOSITION - The present invention concerns improved polymerizable anaerobic compositions which contain (meth)acrylic ester monomers, peroxy polymerization initiators, saccharin a saccharin derivative or a related sulfimide derivative and an activator containing a ferrocene moiety. | 11-10-2011 |
20120067249 | MOISTURE CURABLE POLYDISULFIDES - Provided are polydisulfides that are useful in moisture curable sealants. The polydisulfides have an S—S link in the backbone and are end-capped with at least one alkoxysilane functional group. Also provided are methods of making the polydisulfides, including methods that do not require the presence of a catalyst. | 03-22-2012 |
20130018122 | MACRO-PHOTOINITIATORS AND CURABLE COMPOSITIONS THEREOF - Macro-photoinitiators having defined polymer chain structure are provided. The macro-photoinitiators are terminated with residues of thiol and/or hydroxyl functional photoinitiators. The macro-photoinitiators may be prepared by controlled radical polymerization methods, such as atom transfer radical polymerization and single electron transfer polymerization methods. Also provided are curable (e.g., photocurable) compositions that include the macro-photoinitiators of the present invention. | 01-17-2013 |
20140107283 | CONTROLLED RADICAL POLYMERIZATION OF (METH)ACRYLATE MONOMERS - Living radical polymerization processes, reaction products of such processes, and compositions containing such reaction products are provided. More particularly, a living radical polymerization of (meth)acrylic acid monomers employing having a defined order of introduction of the reactants and/or a specific set of reaction conditions, is provided. | 04-17-2014 |
20140216649 | THIOL-ENE CURED OIL-RESISTANT POLYACRYLATE SEALANTS FOR IN-PLACE GASKETING APPLICATIONS - The present invention relates to thiol-ene curing compositions, which cure upon exposure to ultraviolet (UV) light and/or heat. The compositions include components having alkenyl (or “ene”) functionality and components having thiol functionality, which undergo thiol-ene curing. The compositions also include a cure system. More specifically, in some embodiments, the curable compositions include a vinyl polymer bearing alkenyl or thiol terminal functional group(s) and a cross-linking agent having the opposing functionality, i.e., thiol cross-linking agents with alkenyl-terminated vinyl polymers and vinyl cross-linking agents with thiol-terminated vinyl polymers. Also provided are methods of making and using the compositions, such as for sealants for in-place gasketing applications. | 08-07-2014 |
20140221573 | HIGHLY FUNCTIONALIZED RESIN BLENDS - The present invention relates to multi-functional polymeric resin blends which have a defined average molecular weight distribution. Additionally each polymeric component of the blend has a polydispersity of from about 1.01 to about 2.50, The average functionality of the blend is from about 1.8 to about 4.0. More particularly, the present invention relates to poly(meth)acrylates having three or more functional groups. These highly functionalized resin blends are desirably prepared using controlled free radical polymerization techniques, such as single electron transfer living radical polymerization (SET-LRP) processes to produce a variety of blended resin systems which have tailored and enhanced properties. | 08-07-2014 |
20140275448 | METHODS AND APPARATUS FOR CONTROLLED SINGLE ELECTRON TRANSFER LIVING RADICAL POLYMERIZATION - This invention provides methods for controlled single electron transfer living radical polymerization (SET-LRP) of monomers with increased conversion, high molecular weights and low polydispersity by allowing the polymerization to proceed at low temperatures via a tubular reactor either made of copper or containing copper metal surface. | 09-18-2014 |
20140283983 | (METH)ACRYLATE-FUNCTIONAL POLYACRYLATE RESINS WITH NARROW BUT BIMODAL MOLECULAR WEIGHT DISTRIBUTIONS - The present invention is directed to compositions useful for maintaining sealing force over time while under compression in compressive gaskets. Additionally, methods of preparing and using the sealing compositions and improving sealing performance using such compositions are provided. | 09-25-2014 |