专利号:US-7615300-B2 优先权日:2005-08-30 标 题 :Development of novel proton-conductive polymers for proton exchange membrane fuel cell (PEMFC) technology 发明人:BAE CHULSUNG 权利人:REGENTS UNIVERSITY AND COMMUNI 摘要:New thermally and chemically stable sulfonic acid-containing polymers are synthesized via post-sulfonation of aromatic polymers. These new polymers provide unique benefits to proton exchange membrane fuel cell technology (“PEMFCâ€?). As a sulfonic acid moiety can be easily installed into an aromatic ring via electrophilic sulfonation, even in the presence of an electron-withdrawing substituent such as —F, rigid polymers consisting of aromatic rings at either the side chain or main chain can be prepared with a wide range of substituents and flexibility in properties. Novel synthetic procedures are provided for synthesis of the polymers.
专利号:US-9562141-B2 优先权日:2013-05-23 标题 :Method of aerogel synthesis 发明人:RODMAN DAVID L; POE GARRETT D; FARMER BRANDON S; SMITH JOSEPH C 权利人:NEXOLVE CORP; NEXOLVED CORP 摘要:The present disclosure provides a method for producing an aerogel, the method comprising reacting at least one acid monomer with at least one diamino monomer in a first solvent under conditions appropriate to form a polyimide polymer; conducting a solvent exchange wherein the first solvent is exchanged for a second solvent, said second solvent having a freezing point, wherein said solvent exchange further comprises (1) submersing the polyimide polymer in the second solvent in a pressure vessel and (2) creating a high pressure environment inside the pressure vessel for a first period of time; cooling the polyimide polymer to a first temperature below the freezing point of the second solvent; and subjecting cooled polyimide polymer to a first vacuum for a second period of time at a second temperature.
专利号:US-9963578-B2 优先权日:2013-07-17 标题 :Black polyimides and synthesis thereof 发明人:FARMER BRANDON S; POE GARRETT D; RODMAN DAVID L; BRADBURN JR LONNIE F 权利人:NEXOLVE CORP 摘要:Black polyimides polymer and a method of synthesizing the same have been developed. The black polyimide polymer includes at least one acid monomer, at least one diamino monomer and a solvent-soluble black dye. The acid and diamino monomers having been reacting in a solvent under suitable conditions to form a polyimide precursor polymer.
专利号:US-4503254-A 优先权日:1982-03-24 标 题:Process for making bis(halophenyl)hexafluoropropanes 发明人:KELLEGHAN WILLIAM J 权利人:HUGHES AIRCRAFT CO 摘要:A new process for preparing diphenyl derivatives of hexafluoropropane containing halogen substituents on the phenyl rings and new halogen-substituted diphenyl derivatives of hexafluoropropane prepared thereby are disclosed. The new compounds of this invention are useful as intermediates for the synthesis of high temperature polymer systems.
专利号:GB-2137984-A 优先权日:1983-02-14 标题:Synthesis of Bis(ethynylphenyl) Compounds
专利号:EP-2999736-A1 优先权日:2013-05-23 标题 :Method of aerogel synthesis