| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 528210000 | Phenolic reactant contains a nitrogen atom | 8 |
| 20080214772 | Rigid Heterocyclic Polymer, Production Process Thereof, and Fibers Comprising the Polymer - There are provided a rigid heterocyclic polymer comprising rigid recurring units such as units represented by the following formulae (a) and (b): | 09-04-2008 |
| 20080242829 | METHODS FOR PRODUCING AND PURIFYING 2-HYDROCARBYL-3,3-BIS(4-HYDROXYARYL)PHTHALIMIDINE MONOMERS AND POLYCARBONATES DERIVED THEREFROM - Disclosed herein is a method comprising reacting a phenolphthalein material and a primary hydrocarbyl amine in the presence of an acid catalyst to form a reaction mixture comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the phenolphthalein material comprises greater than or equal to 95 weight percent phenolphthalein, based on the total weight of phenolphthalein material; quenching the reaction mixture and treating the quenched reaction mixture to obtain a first solid. The first solid is then triturated with a trituration solvent and washed to obtain a second solid, wherein the second solid comprises greater than or equal to 97 weight percent 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, based on the total weight of the second solid. The second solid may be polymerized to form a polycarbonate. | 10-02-2008 |
| 20130012681 | 2,4,5-TRIAMINOPHENOLS AND RELATED COMPOUNDS - New triaminophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts and diacid complexes from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment. | 01-10-2013 |
| 20140163193 | DIFLUORO BENZOTRIAZOLYL SOLAR CELL POLYMERIC MATERIAL AND PREPARATION METHOD AND USE THEREOF - Disclosed are a difluoro benzotriazolyl solar cell polymeric material and preparation method and use thereof; the copolymer has a structure as represented by formula (I), wherein both R | 06-12-2014 |
| 20150094445 | Asymmetric Modified Carbon Molecular Sieve Hollow Fiber Membranes Having Improved Permeance - The present invention provides an asymmetric modified CMS hollow fiber membrane having improved gas separation performance properties and a process for preparing an asymmetric modified CMS hollow fiber membrane having improved gas separation performance properties. The process comprises treating a polymeric precursor fiber with a solution containing a modifying agent prior to pyrolysis. The concentration of the modifying agent in the solution may be selected in order to obtain an asymmetric modified CMS hollow fiber membrane having a desired combination of gas permeance and selectivity properties. The treated precursor fiber is then pyrolyzed to form an asymmetric modified CMS hollow fiber membrane having improved gas permeance. | 04-02-2015 |
| 20150353731 | HEAT-CURABLE RESIN COMPOSITION - The present invention can provide a heat-curable resin composition which is excellent in insulation property, heat resistance, and preservation stability. The heat-curable resin composition includes (A) cyanate ester compound having at least two cyanate groups in a molecule, (B) phenol curing agent including a resorcinol type phenol resin represented by the formula (1), | 12-10-2015 |
| 20160060396 | POLYMERS, THEIR METHOD OF MANUFACTURE AND USE THEREOF - A method for the manufacture of a polymer is provided, the method comprising:
| 03-03-2016 |
| 20160168326 | SYNTHESIS AND POLYMERIZATION OF OLIGOMERIC ALIPHATIC-AROMATIC BASED PHTHALONITRILES | 06-16-2016 |
