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| Number | Title | Issue Date |
| 8163865 | Biocompatible amino acid anhydride polymers Biocompatible amino acid anhydride polymers for use in tissue engineering, and methods for their preparation and use. ... | 04/24/2012 |
| 8153753 | Alicyclic or aromatic polyamides, polyamide films, optical members made by using the same, and polyamide copolymers A polyamide having at least an alicyclic or aromatic group exhibiting a light transmittance of 80% or more in the wavelength region of 450 to 700 nm is produced by using an aramide polymer comprising specific structural units at an amount of 50 mol % or more. Colorl... | 04/10/2012 |
| 8129496 | Method for high density data storage and imaging An approach is presented for designing a polymeric layer for nanometer scale thermo-mechanical storage devices. Cross-linked polyimide oligomers are used as the recording layers in atomic force data storage device, giving significantly improved performance when comp... | 03/06/2012 |
| 8088882 | Polymer precursor, high transparency polyimide precursor, polymer compound, resin composition and article using thereof A main object of the present invention is to provide a polymer precursor which exhibits high transmittance to a shorter wavelength range with respect to an electromagnetic wave though the polymer precursor has a part which sequences an unsaturated bond having a π e... | 01/03/2012 |
| 8080630 | Process for preparing a melt-processable polyamide composition The invention relates to a process for preparing a melt-processable polylactam by contacting caprolactam monomer with an anionic polymerization catalyst, polymerizing said monomer and contacting the resulting polylactam with a protic compound. The anionic polymeriza... | 12/20/2011 |
| 8058385 | Method for preparing conjugates using polymer maleimides Methods for preparing conjugates using polymeric reagents bearing a maleimide are provided. Also provided are compositions comprising the conjugates. ... | 11/15/2011 |
| 8039579 | Intermediates useful in the preparation of maleimide functionalized polymers Methods for forming maleimide functionalized polymers are provided. In one such embodiment, a maleimide functionalized polymer is prepared in a method that includes a step of carrying out a reverse Diels-Alder reaction. Intermediates useful in the methods, as well a... | 10/18/2011 |
| 8022170 | Copolyamides The invention relates to semi crystalline, melt processible, partially aromatic copolyamides, producible by condensation of at least the following monomers or the precondensates thereof: a) terephthalic acid b) at least one dimerised fatty ... | 09/20/2011 |
| 7994273 | Photoactive materials Diamine compounds, which in particular are useful as precursors for the production of liquid crystal alignment layers, are represented by the general formula I: wherein A1 repre... | 08/09/2011 |
| 7994272 | Maleamic acid polymer derivatives and their bioconjugates The present invention is directed to maleamic acid derivatives of water soluble polymers, to chemically stable water-soluble polymer succinamic acid-active agent conjugates, and to methods for reproducibly preparing, characterizing and using such polymer reagents an... | 08/09/2011 |
| 7989578 | Negative photosensitive polyimide polymer and uses thereof The present invention relates to a negative photosensitive polyimide polymer having a repeating unit of formula (1) as a polymerized unit: wherein G, Q and P* are as defined in the specification. The polyimide polymer of th... | 08/02/2011 |
| 7977449 | Polyamide piece reinforced with long fibers The present invention relates to reinforced articles based on a polyamide matrix of high melt flow index and on long fibers. The articles according to the invention exhibit good mechanical properties, such as good tensile strength, good surface finish and good molda... | 07/12/2011 |
| 7935779 | Synthesis of polyimides (PI) from poly-carbodiimides and dianhydrides by sequential self-repetitive reaction (SSRR) Disclosed are processes for synthesizing polyimides by a sequential self-repetitive reaction between poly (aryl carbodiimide) (p-CDI) or aryl diisocyanates with dianhydrides. ... | 05/03/2011 |
| 7884174 | Imide-linked maleimide and polymaleimide compounds The invention is based on the discovery that a remarkable improvement in the performance of maleimide thermosets can be achieved through the incorporation of imide-extended mono-, bis-, or polymaleimide compounds. These imide-extended maleimide compounds are readily... | 02/08/2011 |
| 7829657 | Polycationically charged polymer and the use of the same as a carrier for nucleic acid Disclosed is a composition for the delivery of nucleic acid to target cells or tissues, which comprises a polycationically charged polymer as a carrier of nucleic acid. The polycationically charged polymer is a polymer which may comprise a charged polymer segment ha... | 11/09/2010 |
| 7803896 | Polyimide-titania hybrid materials, their preparation, and film prepared from the materials The present invention relates to polyimide-titania hybrid thin film, which possesses relatively good surface planarization, excellent thermal properties (400 | 09/28/2010 |
| 7790836 | Diamine compound having dendron side chain and liquid crystal aligning agent using same Disclosed herein is a novel functional diamine compound having a dendron structure, polyamic acid which is produced using functional diamine, aromatic cyclic diamine, aliphatic cyclic acid dianhydride, and aromatic cyclic acid dianhydride, polyimide which is produce... | 09/07/2010 |
| 7790835 | Method of preparing maleimide functionalized polymers Methods for forming maleimide functionalized polymers are provided. In one such embodiment, a maleimide functionalized polymer is prepared in a method that includes a step of carrying out a reverse Diels-Alder reaction. Intermediates useful in the methods, as well a... | 09/07/2010 |
| 7786250 | Vector directional polymer systems and methods of nano-structural self assembly Vector-directional polymers and polymer systems are disclosed. In accordance with the embodiments of the invention, the polymer has aromatic moieties that are restrained or fixed through conformational linkage units bonding nearest neighbor aromatic moieties togethe... | 08/31/2010 |
| 7776996 | Continuous method for the production of polyamides A continuous process for producing polyamides, their oligomers or mixtures thereof, if appropriate with further reaction products, comprises reaction of aminonitriles or dinitriles and diamines or mixtures thereof, if appropriate together with further polyamide-form... | 08/17/2010 |
| 7767782 | Solid-state post-condensation process for increasing the molecular weight of a polyamide The invention relates to a process for increasing the molecular weight of a polyamide via solid-state post-condensation by exposing the polyamide in the solid-state at elevated temperature to an inert gas atmosphere, that comprises a step (a) wherein the gas atmosph... | 08/03/2010 |
| 7750110 | Flexible semicrystalline polyamides The invention relates to a composition, and structures having a layer made of said composition, in which the composition is, by weight, the total being 100%: 50 to 100% of at least one polyamide A1 of formula X.Y/Z or 6.Y2/Z in whi... | 07/06/2010 |
| 7741426 | Method for production of fluorinated phenylenediamine A method for the production of a fluorinated phenylenediamine is provided which comprises steps of reacting a diamide represented by the following formula with NaOCl at a molar ratio of the NaOCl to the diamide in the range of 2.0-6.0 and NaOH at a molar ratio of th... | 06/22/2010 |
| 7728102 | Polyamide-imide resin, flexible metal-clad laminate, and flexible printed wiring board The present invention provides a non-halogen polyamide-imide resin soluble in an amide solvent at a concentration of 10%, the resulting varnish, when stored at 5° C. for 1 month, exhibiting a solution viscosity change ((solution viscosity after 1 month−initial so... | 06/01/2010 |
| 7709596 | Cyclic alkyl substituted glycolides and polylactides therefrom Cyclic alkyl, particularly cyclohexyl, substituted glycolides and polylactides are described. The polylactides have a high glass transition temperature and improved clarity. ... | 05/04/2010 |
| 7691960 | Citric acid based emulsifiers for oilfield applications exhibiting low fluorescence The present invention relates to a composition of citric acid based emulsifiers comprising polyamides for oilfield drilling applications that exhibit very low fluorescence, and to a process for their preparation. ... | 04/06/2010 |
| 7666976 | Polyamides Polyamide, whose main chain contains a chemically bound amine selected from the group consisting of 2-methyl-1,5-diaminopentane and 1-amino-2-R-cyclopent-1-ene, where R is a functional group capable of combining with an amino group to form an amide group, and... | 02/23/2010 |
| 7659360 | Low water-absorptive polyimide resin and method for producing same A polyimide resin is produced by the reaction of a compound selected from 1,2,4,5-cyclohexanetetracarboxylic acid, dianhydride thereof and reactive derivatives thereof and a compound selected from diamines and diisocyanates each containing at least one phenylene gro... | 02/09/2010 |
| 7659361 | Maleamic acid polymer derivatives and their bioconjugates The present invention is directed to maleamic acid derivatives of water soluble polymers, to chemically stable water-soluble polymer succinamic acid-active agent conjugates, and to methods for reproducibly preparing, characterizing and using such polymer reagents an... | 02/09/2010 |
| 7635746 | Diamine compound containing triazine group, polyamic acid synthesized from the diamine compound and LC alignment film prepared from the polyamic acid Diamine compound containing specific triazine group, polyamic acid obtained by reacting the diamine compound and tetracarboxylic dianhydride, and liquid crystal alignment film obtained by coating and imidizing the polyamic acid. The liquid crystal alignment film has... | 12/22/2009 |
| 7629433 | Compounds containing aldimine The invention relates to compounds of formula (I) which contain aldimine, and to the use thereof. Said compounds which contain aldimines are characterized in that they are odor-less and during hydrolysis the odor-free aldehydes are separated. They are used, therefor... | 12/08/2009 |
| 7615606 | Method and device for continuously producing copolyamides with melting points greater than 265° C. The invention relates to a method for continuously producing copolyamides with melting points greater than approximately 265° C. According to the invention, in a continuous process, partially aromatic and partially crystalline polyamides of the following chemical s... | 11/10/2009 |
| 7601796 | Synthesis of hybrid block copolymers and uses thereof The present invention relates to the field of polymer chemistry and more particularly to multiblock copolymers and methods of preparing the same. ... | 10/13/2009 |
| 7579429 | Cyclic alkyl substituted glycolides and polylactides therefrom Cyclic alkyl, particularly cyclohexyl, substituted glycolides and polylactides are described. The polylactides have a high glass transition temperature and improved clarity. ... | 08/25/2009 |
| 7470765 | Method for producing polyamides A process for preparing a polyamide by reacting a mixture which comprises a monomer which has a nitrile group and has at least one other functional group capable of forming a carboxamide group, and comprises water, in the presence of titanium dioxide as catalyst, wh... | 12/30/2008 |
| 7465780 | Polyimide comprising sulfonic acid group at the terminal of side chain, and polymer electrolyte and fuel cell using the same The present invention is related to a polyimide, which has high ionic conductivity and good structural stability, does not decompose even under low humidity, and is inexpensive, and a polymer electrolyte and a fuel cell using the same. In particular, the polyimide o... | 12/16/2008 |
| 7428857 | Gear, speed reduction gear using the same, and electric power steering apparatus using the same A gear composed of a polymer blend or a copolymer of PA66 and PA6 which contains a part having a PA66 molecular structure and a part having a PA6 molecular structure in a weight ratio of PA66/PA6=99.9/0.1 to 95.0/5.0 is excellent in durability as well as heat resist... | 09/30/2008 |
| 7408020 | Composition for LC alignment film using diamine having dendron side chain Disclosed herein is an LC aligning agent using diamine having dendron side chains. In detail, the present invention relates to a composition for an LC alignment film which employs diamine having dendron side chains to produce polyamic acid, followed by imidization. ... | 08/05/2008 |
| 7396898 | Diamine, acid dianhydride, and reactive group containing polyimide composition prepared therefrom and process of preparing them The present invention relates to a novel diamine, a novel acid dianhydride, and a novel composition containing a polyimide produced from such diamine and acid dianhydride. Specifically, the present invention relates to an acid dianhydride that has a photosensitive g... | 07/08/2008 |
| 7393913 | Polyamides Polyamide whose main chain contains a chemically bound N-alkyllactam, and processes for preparing such a polyamide and fibers, films and moldings comprising such a polyamide. ... | 07/01/2008 |
