| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 528350000 | From carboxylic acid having three or more carboxylic acid groups or derivatives thereof, and an organic amine, or from an organic amine salt of a tri-or higher carboxylic acid | 18 |
| 528352000 | Phosphorus- or sulfur-containing reactant | 2 |
| 20090182116 | MANUFACTURE OF PHOSPHORUS-CONTAINING DIAMINES AND THEIR DERIVATIVES - A series of novel phosphorus-containing compounds having the following formula are disclosed: | 07-16-2009 |
| 20080319159 | SINGLE-STEP-PROCESSABLE POLYIMIDES - A process for synthesizing formulations for polyimides suitable for use in high-temperature composites in which all reactions other than chain-extension have already taken place prior to making a composite is described, wherein the resulting oligomers comprise a backbone and at least one difunctional endcap. The resulting resin systems have only the single step of endcap-to-endcap reactions during composite processing. Prior to the initiation temperature of these endcap-to-endcap reactions, the resins are stable affording the composite manufacturer a very large processing window. | 12-25-2008 |
| 528353000 | Carboxylic acid contains at least four carboxylic acid groups or is a derivative of a carboxylic acid containing at least four carboxylic groups | 16 |
| 20100041860 | POLYIMIDE, DIAMINE COMPOUND AND METHOD FOR PRODUCING THE SAME - A polyimide obtained by reacting a tetracarboxylic acid component with a diamine component containing a diamine compound represented by the following general formula (1): | 02-18-2010 |
| 20120029164 | ESTER GROUP-CONTAINING TETRACARBOXYLIC ACID DIANHYDRIDE, POLYESTER POLYIMIDE PRECURSOR, POLYESTERIMIDE, AND METHODS FOR PRODUCING SAME - Disclosed is a polyesterimide having a repeating unit expressed by the formula below, and also provides the manufacturing methods thereof: | 02-02-2012 |
| 20080269458 | POLYIMIDE AND LIQUID CRYSTAL ALIGNMENT FILM THEREOF - The present invention provides a polyimide having the formula (II) formed by reacting a dianhydride with the diamine having the formula (I). The polyimide provided by the present invention serves as a material for preparing the liquid crystal aligning film, wherein the liquid crystal aligning film could achieve the pre-tilt angle of 88-90° by containing only less than 5% of the diamine having the formula (I), which could highly lower down the manufacturing cost. | 10-30-2008 |
| 20090082543 | METHOD OF PREPARING POLY(AMIC ACID) AND METHOD OF PREPARING POLYIMIDE - A method of preparing a poly(amic acid) includes a step of reacting an aromatic diacid anhydride or alicyclic diacid anhydride, an aliphatic diamine or alicyclic diamine, and an acid having a pKa of 3 to 5. A method of preparing a polyimide by imidating the resulting poly(amic acid) is also disclosed. | 03-26-2009 |
| 20090137770 | POLYMIDE OPTICAL COMPENSATION FILMS - A polyimide optical compensation film is provided. The polyimide optical compensation film has the formula: | 05-28-2009 |
| 20110245455 | POLYIMIDE FILM - The present invention provides a polyimide film having a good transparency and also an excellent thermal resistance so that it is useful in a transparent conductive film, TFT substrate, a flexible printing circuit substrate, and the like. | 10-06-2011 |
| 20110178266 | POLYIMIDE FILM - Disclosed is a polyimide film, which is very transparent and very resistant to heat and thus undergoes little dimensional change under thermal stress, and is suitable for use in transparent conductive films, TFT substrates, flexible printed circuit boards and so on. | 07-21-2011 |
| 20110257360 | TETRACARBOXYLIC ACID OR POLYESTERIMIDE THEREOF AND PROCESS FOR PRODUCING THE SAME - The present invention provides a useful and novel alicyclic polyesterimide. | 10-20-2011 |
| 20100305299 | BIPHENYLTETRACARBOXYLIC ACID DIANHYDRIDE AND PROCESS FOR PRODUCING THE SAME, AND POLYIMIDE FORMED FROM THE SAME AND PROCESS FOR PRODUCING THE SAME - To provide a process for producing BPDA whereby high productivity is attained while high purity is maintained. | 12-02-2010 |
| 20110257361 | ALKYL BENZENE TETRACARBOXYLIC DIANHYDRIDE, MANUFACTURING METHOD THEREOF, POLYIMIDE, AND APPLICATION THEREOF - Disclosed is a 5-alkyl-1,2,3,4-benzene tetracarboxylic-1:2,3:4-dianhydride which is represented by the general formula (1) and has excellent solubility with respect to various organic solvents. Depending on the diamine that is used, a polyimide with excellent heat resistance or a polyimide with good workability at a low melting point can be provided, and in addition, a polyimide that exhibits excellent characteristics for electronic materials or the like can be provided. | 10-20-2011 |
| 20090171063 | Polyimide film and methods relating thereto - A polyimide film with advantageous handleability, flexibility, dimensional stability and heat resistance is provided. The polyimide film is characterized by block-copolymerizing an aromatic diamine component comprising 10˜25 mol % of paraphenylenediamine (a1) and 75˜90 mol % of 4,4′-diaminodiphenyl ether (a2) with an aromatic tetracarboxylic acid component consisting of 75˜99.9 mol % of pyromellitic acid dianhydride (b1) and 0.1˜25 mol % of 3,3′,4,4′-biphenyl tetracarboxylic acid dianhydride (b2). The Young's modulus, linear expansion coefficient, water absorption rate and glass transition temperature of such polyimide films can be controlled within very useful ranges. | 07-02-2009 |
| 20090118461 | Wholly Aromatic Liquid Crystalline Polyetherimide (LC-PEI) Resins - The benefits of liquid crystal polymers and polyetherimides are combined in an all-aromatic thermoplastic liquid crystalline polyetherimide. Because of the unique molecular structure, all-aromatic thermotropic liquid crystal polymers exhibit outstanding processing properties, excellent barrier properties, low solubilities and low coefficients of thermal expansion in the processing direction. These characteristics are combined with the strength, thermal, and radiation stability of polyetherimides. | 05-07-2009 |
| 20090253891 | CLEANING SUBSTRATE OF SUBSTRATE PROCESSING EQUIPMENT AND HEAT RESISTANT RESIN PREFERABLE THEREOF - The present invention provides a cleaning substrate of a substrate processing equipment, which comprises a cleaning layer comprising a heat resistant resin with a storage modulus (1 Hz) at 20° C. up to 150° C. being 5×10 | 10-08-2009 |
| 20090088551 | POLYIMIDE FILM - The objective of the present invention is to provide a polyimide film with decreased water absorption. A polyimide film, which is made of diamine and tetracarboxylic dianhydride, characterized in that tetracarboxylic dianhydride, which constitutes polyimide, contains tetracarboxylic dianhydride. | 04-02-2009 |
| 20130012682 | BIPHENYLTETRACARBOXYLIC ACID DIANHYDRIDE AND PROCESS FOR PRODUCING THE SAME, AND POLYIMIDE FORMED FROM THE SAME AND PROCESS FOR PRODUCING THE SAME - To provide a process for producing BPDA whereby high productivity is attained while high purity is maintained. | 01-10-2013 |
| 20130018167 | Solvent-Soluble 6,6-Polyimide Copolymers and Processes for Preparing ThemAANM Itatani; HiroshiAACI Ushiku-shiAACO JPAAGP Itatani; Hiroshi Ushiku-shi JP - Heat-resistant polyimide copolymers having the following four components: pyromellitic dianhydride (PMDA), 1,4-diaminodiphenyl ether (DADE), biphenyltetracarboxylic dianhydride (BPDA), and 2,4-diaminotoluene (DAT) are provided. In an embodiment the molar ratio of (BPDA):(DADE):(PMDA):(DAT) is 2:2:m:m, in which m is an integer of 3, 4 or 5. | 01-17-2013 |
