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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7872089 | Multi-level tubular reactor with internal tray The disclosure describes a reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor can include a horizontally elongated reactor segment containing a horizontally elongated tubular member and a tray disposed within th... | 01/18/2011 |
| 7863402 | Organic superacids, polymers derived from organic superacids, and methods of making and using the same One embodiment of the invention contemplates a proton exchange membrane for use in a variety of fuel cells. The proton exchange membrane may comprise a solid phase organic based copolymer material in which a first structural unit is derived from a polymerizable orga... | 01/04/2011 |
| 7754844 | Polyarylene ether compound containing sulfonic acid group, composition containing same, and method for manufacturing those A polyarylene ether-based compound according to the present invention includes polymer components represented in general formula (1) and general formula (2): wherein Ar indicates a divalent aromatic group, Y indicates a sul... | 07/13/2010 |
| 7718753 | Organic superacids, polymers, derived from organic superacids, and methods of making and using the same One embodiment of the invention contemplates a proton exchange membrane for use in a variety of fuel cells. The proton exchange membrane may comprise a solid phase organic based copolymer material in which a first structural unit is derived from a polymerizable orga... | 05/18/2010 |
| 7662904 | Aromatic polyether resins crosslinked by amic acid or imide side chain The present invention relates to aromatic polyether resins crosslinked with amic acid or imide side chain, and more particularly, to the aromatic polyether resin crosslinked by amic acid or imide side chain, which is produced by heat curing of amic acid, wherein int... | 02/16/2010 |
| 7423110 | Polysulfone compositions exhibiting very low color and high light transmittance properties and articles made therefrom A polysulfone composition is provided having a total luminous light transmittance of 84% or greater when measured on 0.1 inch thick specimens using ASTM D-1003. The specimens also meet at least one of the following two conditions: 1) a yellowness index (YI) of less ... | 09/09/2008 |
| 7393914 | Polyethersulfone compositions Novel polyethersulfone compositions have been discovered which incorporate structural subunits derived from sulfonated bis(halophenyl)sulfones, dihydroxy terphenyls, and/or bis(hydroxyphenyl)pyridines. The sulfonated polyethersulfones show promise as materials for u... | 07/01/2008 |
| 7375176 | Liquid crystal poly(phenylene sulfonic acids) A rigid, rod liquid crystal polymer includes a poly(phenylene sulfonic acid). ... | 05/20/2008 |
| 7371801 | Vinyl ester and epoxide resins toughened with thermoplastic resin particles A material having a fracture toughness (K1c) of at least 1.2 Mpam.m1/2 as determined according to Standard ISO 13586:2000 comprises a vinyl ester and/or epoxide resin polymerizable at a temperature of less than 70° C. combined with thermoplast... | 05/13/2008 |
| 7351775 | Ion conductive membrane made from a block copolymer and methods of making a block copolymer A block copolymer for use as a solid polymer electrolyte, said block copolymer having at least first and second segments, the first segments being hydrophilic segments provided with acidic substituents for proton transport and the second segments being hydrophobic s... | 04/01/2008 |
| 7312282 | Process of preparation of block copolymers and the block copolymers prepared therefrom Processes for preparing block copolymers and the block copolymers prepared therefrom comprising at least two types of homoblock, all belonging to the polysulfone family, wherein each of the said homoblocks has an identical or different molecular weight of at least 1... | 12/25/2007 |
| 7288603 | Polybenzazole compound having sulfonic acid group and/or phosphonic acid group, resin composition containing the same, resin molding, solid polymer electrolyte membrane, solid polymer electrolyte membrane/electrode assembly and method of preparing assembly An object of the present invention is to obtain a novel polymeric material capable of forming a solid polymer electrolyte excellent not only in processability, solvent resistance and durability/stability but also in ion conductivity by introducing sulfonic acid grou... | 10/30/2007 |
| 7273919 | High heat polyethersulfone compositions High heat polyethersulfone compositions are provided which possess unexpectedly high glass transition temperatures. The polyethersulfone compositions comprise structural units derived from phthalimide bisphenols such as 3,3-bis(4 -hydroxyphenyl)-N-phenylphthalimide,... | 09/25/2007 |
| 7262265 | High temperature thermoset compositions A new family of high temperature thermoset resins having high glass transition temperatures and enhanced hygrothermal stability that are synthesized using inexpensive starting materials in essentially a single step process. A trifunctional aromatic, wherein at least... | 08/28/2007 |
| 7202324 | Perfluorostyrene compound, and coating solution and optical waveguide device using the same Disclosed is a fluorine compound having perfluorostyrene introduced at a terminal thereof, as represented in the following Formula 1, and a coating solution and an optical waveguide device using the same, characterized in that the introduction of perfluorostyrene re... | 04/10/2007 |
| 7169702 | Polysulfone compositions exhibiting very low color and high light transmittance properties and articles made therefrom A polysulfone composition is provided having a total luminous light transmittance of 84% or greater when measured on 0.1 inch thick specimens using ASTM D-1003. The specimens also meet at least one of the following two conditions: 1) a yellowness index (YI) of less ... | 01/30/2007 |
| 7169615 | Method of authenticating polymers, authenticatable polymers, methods of making authenticatable polymers and authenticatable articles, and articles made there from Disclosed is a method of authenticating that a test polymer is an authenticatable polymer, wherein the authenticatable polymer has an authentication signal and comprises a substrate polymer and an optically variable tag, the optically variable tag having a fluoresce... | 01/30/2007 |
| 7165881 | Methods and apparatus for high-shear mixing and reacting of materials Methods and apparatus for high shear reacting and/or mixing of moving fluid streams of materials employ an interdiffusing and reacting zone formed in the space between two stationary surfaces, the surfaces being spaced apart a maximum distance of the sum of the thic... | 01/23/2007 |
| 7163987 | Thermoplastic molding compositions with an improved melt stability based on polyarlene ether sulfones The present invention relates to molding compositions comprising A) from 39 to 99% by weight of at least one polyarylene ether sulfone built up from bifunctional monomer units, B) from 1 to 20% by weight of at leas... | 01/16/2007 |
| 7163988 | Aromatic sulfonic acid ester derivative, polyarylene, polyarylene having sulfonic acid group and process for producing the same, and polymer solid electrolyte and proton-conductive membrane Disclosed is an aromatic sulfonic acid ester derivative represented by the formula (1); in the formula, X is an atom or a group selected from a halogen atom excluding fluorine, —OSO3CH3 an... | 01/16/2007 |
| 7153420 | Water purification by polymer colloids A colloid comprises a sulfone polymer. The colloid may be used as a replacement for activated carbon or charcoal in water purification systems. Unlike activated carbon, the colloid is advantageously regenerated chemically and reused. ... | 12/26/2006 |
| 7148314 | Process for preparation of functionalized polyimides A method for preparation of a sulfonic and or sulfonic acid salt containing polyimide resins comprising melt reaction of a polyimide resin with an organic compound, wherein the organic compound contains at least one aliphatic primary amine functionality and at least... | 12/12/2006 |
| 7135537 | Sulfonimide-containing poly(arylene ether)s and poly(arylene ether sulfone)s, methods for producing the same, and uses thereof The present invention is directed to sulfonimide-containing polymers, specifically sulfonimide-containing poly(arylene ether)s and sulfonimide-containing poly(arylene ether sulfone)s, and processes for making the sulfonimide-containing poly(arylene ether)s and sulfo... | 11/14/2006 |
| 7129318 | RTM and RI processable polyimide resins Polyimide resins that are suitable for processing by resin transfer molding (RTM) and resin infusion (RI) methods at reduced processing temperatures are provided. The inventive RTM and RI processable polyimide resins exhibit melting at temperatures of less than abou... | 10/31/2006 |
| 7125953 | Ion-conducting polymeric materials A method of preparing an ion-conducting polymeric material, for example, for a fuel cell, in a desired form (hereinafter “said formed polymeric material”), comprises: (i) selecting a first ion-conducting polymeric material; (ii) selecting a solvent formulation w... | 10/24/2006 |
| 7115699 | Sulfonated polymer having nitrile-containing hydrophobic block and solid polymer electrolyte Provided are a sulfonated polymer capable of high hot water resistance even if it has an increased amount of the sulfonic groups introduced therein, and a solid polymer electrolyte containing the sulfonated polymer that has high proton conductivity and excellent gen... | 10/03/2006 |
| 7098360 | Processes employing multiple successive chemical reaction process steps and apparatus therefore The invention provides processes and apparatus for the production of materials requiring a plurality of chemical reaction steps. In the prior art the number of reaction vessels is minimized by performing two or more reactions together in the same vessel. Instead eac... | 08/29/2006 |
| 7094364 | Method of authenticating polymers, authenticatable polymers, methods of making authenticatable polymers and authenticatable articles, and articles made there from In one embodiment, a method for authenticating that a test polymer is an authenticatable polymer is disclosed wherein the authenticatable polymer comprises a substrate polymer and a thermochromic compound, the thermochromic compound having a first signal at a first ... | 08/22/2006 |
| 7094810 | pH-sensitive block copolymers for pharmaceutical compositions The present invention relates to a pharmaceutical composition of a biologically active agent and a block copolymer composed of a poly(ethylene oxide) forming hydrophilic segment and a poly(butyl (alkyl)acrylate-co-(alkyl)acrylic acid) that is capable of forming supr... | 08/22/2006 |
| 7081497 | Block copolymer and use thereof The present invention provides a block copolymer comprising at least one segment having an acid group and at least one segment substantially free from an acid group, wherein the segment having an acid group comprises a repeating unit which is a substituted repeating... | 07/25/2006 |
| 7078121 | Aromatic sulfonate derivative, polyarylene, sulfonated polyarylene and production method thereof, macromolecular solid electrolyte, and proton conductive membrane Described herein is a production method of sulfonated polyarylene that is safe and enables easy control of the amount and position of sulfonic groups introduced in the polymer. The sulfonated polyarylene is also disclosed. The invention further provides a polyarylen... | 07/18/2006 |
| 7053168 | Method for preparing polyimide and polyimide prepared thereby A method for preparing a polyimide includes introducing a mixture of an oligomer and a solvent to an extruder, removing solvent via at least one extruder vent, and melt kneading the oligomer to form a polyimide. The polyimide has a low residual solvent content. The ... | 05/30/2006 |
| 7049393 | Techniques for the preparation of highly fluorinated polyethers A process for preparing a fluorinated poly(arylene ether) comprising the repeating unit: wherein n provides a molecular weight up to about 30,000 to 100,000, X represents one of following groups: none, ketone, su... | 05/23/2006 |
| 7041773 | Polyimide sulfones, method and articles made therefrom Polyimide sulfone resins are provided with a glass transition temperature of from 200–350° C., residual volatile species concentration of less than 500 ppm and a total reactive end group concentration of less than about 120 milliequivalents/kilogram resin. The re... | 05/09/2006 |
| 7030206 | Polymer electrolyte and proton-conducting membrane To provide a sulfonic acid group-containing polymer having improved hot water resistance and radical resistance (durability), a solid polymer electrolyte including the polymer, and a proton-conducting membrane including the electrolyte, the polymer electrolyte inclu... | 04/18/2006 |
| 7022810 | Proton exchange membrane materials for the advancement of direct methanol fuel-cell technology A new class of hybrid organic-inorganic materials, and methods of synthesis, that can be used as a proton exchange membrane in a direct methanol fuel cell. In contrast with Nafion® PEM materials, which have random sulfonation, the new class of materials have ordere... | 04/04/2006 |
| 7009026 | Method for producing a liquid crystalline polyester and the liquid crystalline polyester The object is to provide liquid crystalline polyester which gives molded articles without generating acetic acid gas, and a method for producing the liquid crystalline polyester. This object is achieved by a method for producing a liquid crystalline polyester compri... | 03/07/2006 |
| 6998464 | Method for producing a solution consisting of a polymer containing recurrent azole units, solutions produced according to said method and use of the same The present invention relates to a method of preparing a solution of a polymer comprising recurring azole units, which comprises dissolving a sufficiently dried polymer comprising recurring azole units of the formula wh... | 02/14/2006 |
| 6994330 | Process for high shear gas-liquid reactions A reactor produces a gas-in-liquid emulsion for providing increased interfacial contact area between the liquid and the gas for improved reaction of the gas with the liquid, or more rapid solution or reaction of a difficulty to dissolve or immiscible gas in or with ... | 02/07/2006 |
| 6979721 | Substituted cyclohexene endcaps for polymers with thermal-oxidative stability This invention relates to polyimides having improved thermal-oxidative stability, to the process of preparing said polyimides, and the use of polyimide prepolymers in the preparation of prepregs and composites. The polyimides are particularly useful in the preparati... | 12/27/2005 |
