Class / Patent application number | Description | Number of patent applications / Date published |
528170000 | Imide-containing reactant | 11 |
20090054615 | Methods For Reducing Or Eliminating Defects In Polymer Workpieces - The present disclosure provides novel methods of producing a composition, such as, but not limited to, a polyimide composition. The methods in their most general form comprise providing a workpiece, suspending the workpiece and subjecting the suspended workpiece to processing such that the workpiece undergoes a transformation from a first state to a second state. By maintaining the workpiece in a suspended state during processing, processing-related defects are reduced or eliminated. Using such methods, the present disclosure provides compositions that are have no or reduced processing-related defects. In addition, the compositions are more consistent in chemical and physical properties and are cheaper and more economical to produce (since less product is rejected as unsuitable). | 02-26-2009 |
20090093608 | POLYIMIDE MATERIAL WITH IMPROVED THERMAL AND MECHANICAL PROPERTIES - A method of forming a polymeric material includes forming a solution including at least two solvents and at least two diamines. The at least two diamines include oxydianiline (ODA) in an amount of about 50% to about 90% based on the total moles of the at least two diamines and include m-phenylenediamine (MPD) in an amount of about 10% to about 50% based on the total moles of the at least two diamines. The at least two solvents include a high polarity solvent in an amount of about 40% to about 90% based on the total weight of the at least two solvents and include a low polarity solvent in an amount of about 10% to about 60% based on the total weight of the at least two solvents. The method further includes adding pyromellitic dianhydride (PMDA) to the solution in a ratio of about 0.9 to about 1.05 based on the total moles of the at least two diamines to form a polyamic acid solution. In addition, the method includes imidizing the polyamic acid solution to form a polyimide material. | 04-09-2009 |
20100048853 | POLYETHERIMIDE POLYMER FOR USE AS A HIGH HEAT FIBER MATERIAL - Various embodiments of polymer fibers comprising a high heat polymer and process for making the polymer fibers are provided. In one embodiment, synthetic polymer fibers comprise polyetherimide polymer that is substantially free of foreign particulate matter greater than about 100 microns in size. A process for producing polymer fiber includes melting polymer comprising polyetherimide to a melt temperature that ranges from about 180-500° C. to form a molten polymer; passing the polyetherimide that is substantially free of foreign particulate matter above about 100 microns in size, through a spinneret comprising a plurality of hole openings to produce a fiber bundle; and cooling the fiber bundle with a cooling medium having a temperature that ranges from about 0° C. to about 80° C. | 02-25-2010 |
20100063241 | HIGH PERFORMANCE POLYASPARTIMIDE RESIN - New polyaspartimide compositions and methods of forming and using those compositions arc provided. The compositions are formed by reacting a bismaleimide and diamine in a solvent-free environment. The resulting polyaspartimide comprising recurring monomers of | 03-11-2010 |
20100204431 | METHOD OF MAKING AN AROMATIC POLYETHER COMPOSITION USING PHOSPHAZENIUM SALT PHASE TRANSFER CATALYSTS - A method for carrying out a chemical reaction between at least two reactants occupying separate phases within a multiphase reaction mixture has been discovered in which at least one phosphazenium salt is employed as a phase transfer catalyst. The remarkable utility of phosphazenium salts as phase transfer catalysts is illustrated by the preparation of aromatic ethers. The phosphazenium salt phase transfer catalysts are shown to be especially useful in the preparation of aromatic polyethers such as polyether sulfones. | 08-12-2010 |
20110130538 | PHOTOLYTIC ACID-GENERATING POLYMERS AND MONOMERS FOR THEIR CONSTRUCTION - Polymers for photoresists and monomers for incorporation into those polymers are disclosed. The polymers comprise a photoacid generator (PAG) component and at least a second component that is photolytically stable and acid-stable. The polymers may also contain a third, acid-labile component. The photoacid generator is based on N-sulfoxyimides and related moieties that contain photolabile oxygen-heteroatom and oxygen-aromatic carbon bonds. | 06-02-2011 |
20110301319 | METHOD OF PURIFYING A POLYMER - A method for purifying a polymer comprising providing a first mixture comprising at least one solvent and at least one polymeric material, diluting the first mixture with veratrole to produce a second mixture in which the polymeric material is substantially dissolved at a temperature less than 100° C., performing at least one step selected from (i) contacting the second mixture with an aqueous wash solution, and (ii) filtering the second mixture. | 12-08-2011 |
20120116045 | Liquid Crystal Alignment Agent, Liquid Crystal Alignment Film Manufactured Using the Same, and Liquid Crystal Display Device Including the Liquid Crystal Alignment Film - Disclosed is a liquid crystal alignment agent including a polymer including polyamic acid including a repeating unit represented by Chemical Formula 1, polyimide including a repeating unit represented by Chemical Formula 2, or a combination thereof. | 05-10-2012 |
20150073116 | POLYETHERIMIDES, METHODS OF MANUFACTURE, AND ARTICLES FORMED THEREFROM - A polyetherimide manufactured by reaction of an alkali metal salt of a dihydroxy aromatic compound of the formula | 03-12-2015 |
20160168330 | FLUORINE-CONTAINING MODIFIED BISMALEIMIDE RESIN | 06-16-2016 |
20160194449 | NOVEL POLYAMIDEIMIDE HAVING LOW THERMAL EXPANSION COEFFICIENT | 07-07-2016 |