| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 528340000 |
From at least two organic polyamines
| 20 |
| 528336000 |
Polymerizing in the presence of a specified material
| 17 |
| 528347000 |
Aryl ring-containing reactant
| 17 |
| 528339000 |
From at least two dicarboxylic acids or derivatives or mixtures thereof
| 16 |
| 528337000 |
Phosphorus- or sulfur-containing reactant
| 9 |
| 528341000 |
Heterocyclic-containing reactant other than cyclic acid anhydride as sole hetero ring
| 7 |
| 528338000 |
From at least two dicarboxylic acids or derivatives or mixtures thereof and at least two organic polyamines
| 6 |
| 528343000 |
Carboxylic acid containing (C=O)-(C=O) or is a derivative thereof, e.g., oxalic acid, etc.
| 6 |
| 528346000 |
Cycloaliphatic ring-containing reactant | 2 |
| 20130085257 | METHODS FOR PRODUCING AQUEOUS DIAMINE DICARBOXYLIC ACID SALT SOLUTION AND POLYAMIDE - A method for producing an aqueous diamine dicarboxylic acid salt solution according to the present invention comprises a step of mixing a dicarboxylic acid diester and a diamine, wherein a mixing molar ratio of the diamine to the dicarboxylic acid diester (diamine/dicarboxylic acid diester) is 1.005 or more. In addition, a method for producing a polyamide according to the present invention comprises a step of mixing a dicarboxylic acid diester and a diamine and heating the formed aqueous diamine dicarboxylic acid salt solution to perform a polycondensation reaction of the diamine and a dicarboxylic acid, wherein a mixing molar ratio of the diamine to the dicarboxylic acid diester (diamine/dicarboxylic acid diester) is 1.005 or more. | 04-04-2013 |
| 20130178597 | POLYIMIDE PRECURSOR, POLYIMIDE, AND MATERIALS TO BE USED IN PRODUCING SAME - Disclosed is a novel co-polyimide precursor for producing a polyimide having high transparency. The co-polyimide precursor comprises a unit structure represented by general Formula (A1) and a unit structure represented by general Formula (A2): | 07-11-2013 |
| 528342000 |
From reactant containing at least three amino-nitrogen-containing groups or with a carboxylic acid containing at least three carboxylic acid groups or deivatives thereof | 2 |
| 20080306240 | Process for Amination of Acrylic Macromonomers and Products Therefrom - Processes for forming adducts of amines with acrylic macromonomers are provided. Also provided are processes for using ring-closing reactions of the adducts to form lactams. The adducts are useful, for example, for making adhesives, surfactants, viscosity modifiers, processing aids, and other products. | 12-11-2008 |
| 20110275783 | Nitro compound, amine compound and polyamide derived therefrom - A polyamide represented by formula (6) is provided. The polyamide is fabricated by performing a polycondensation reaction with amine compound shown in formula (4) and an acid or derivative thereof shown in formula (5) as monomers. In formulas (5) and (6), X represents aromatic groups or aliphatic groups. In formula (5), R represents OH group or halogen. | 11-10-2011 |
| 528344000 |
Bridged- or fused-ring-containing reactant other than as anhydride fused to a nonfused- or bridged-ring system | 1 |
| 20100029895 | Fluorinated Diamine and Polymer Formed Therefrom - There is provided a fluorine-containing diamine represented by formula (1). | 02-04-2010 |
| 528345000 |
Ethylenically unsaturated reactant | 1 |
| 20110028679 | Polyamides Prepared From Long-Chain Dicarboxylic Acids and Methods for Making the Polyamides - Polyamides according to formula (I): HO—[OC—(CH | 02-03-2011 |
| 528349000 |
Reactant contains three carbon atoms directly bonded to a single carbon atom | 1 |
| 20150321996 | AMIDE DENDRIMER COMPOSITIONS - Amide compounds, amide polymers, compositions including amide compounds and amide polymers may be used to bind target ions, such as phosphorous-containing compounds in the gastrointestinal tract of animals. In some cases, amide compounds and amide polymers may include a core derived from an amide polyol and an organic polyacid or ester. | 11-12-2015 |
| Entries |
| Document | Title | Date |
|---|
| 20080200640 | Aromatic Polyamide Filament And Method Of Manufacturing The Same - Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized by comprising multi-stage injection of a coagulant with sulfuric acid concentration lowered sequentially stage by stage, to a spun material fed into a coagulant injection tank. The present invention enables increase of a spinning and take-up velocity without occurrence of thread cutting by uniformly and evenly coagulating surface and inside of the spun material. In addition, the present invention recovers the coagulant or water already used and reuses the recovered coagulant or water in the earlier stages, so that it has advantages of saving production costs and reducing environmental contamination. Accordingly, the wholly aromatic polyamide filament produced according to the present invention has high crystallinity X, large apparent crystal size ACS and reduced defects in the crystal itself, thereby exhibiting more improved physical properties such as strength and modulus. | 08-21-2008 |
| 20080214776 | POLYMERIC ESTERQUATS WITH ASYMMETRIC SIDE CHAINS - A process for preparing polymeric esterquats with asymmetric side chains, includes the steps of: (a) reacting one or more alkanolamines with a mixture comprising: (i) one or more C | 09-04-2008 |
| 20080242832 | Semi-conductive polyimide film - The present invention provides a semi-conductive polyimide film having: a common logarithm of a surface resistivity at 25° C. and 60% RH of 9 to 15 log Ω/square; a common logarithm of a volume resistivity of 8 to 15 log Ω·cm; a fatigue stress in accordance with a fatigue test complying with JIS K7118, upon a number of repetition being 10 | 10-02-2008 |
| 20080262193 | PRODUCTION METHOD OF POLYAMIDE - In a repeated batch production of polyamide, a dicarboxylic acid component and a diamine component fed to a batch reactor are melt-polymerized in the absence of solvent. After adding the diamine component to the molten dicarboxylic acid component, the melt polymerization is further continued at a temperature equal to or higher than the melting point of polyamide being produced for at least 10 min while maintaining the pressure of the vapor phase in the batch reactor at higher than 0.1 MPaG by introducing water vapor. The polyamide thus produced is hardly affected by gels even when the melt polymerization is conducted in the presence of polyamide remaining after the previous batch production. Molded articles thereof contain little fisheyes. | 10-23-2008 |
| 20090131630 | Process For the Preparation of a Dicarboxylic Acid - A process for the preparation of a dicarboxylic acid, comprising the steps of (a) contacting a conjugated diene with carbon monoxide and water in the presence of a catalyst system including a source of palladium, a source of an anion and a bidentate phosphine ligand, to obtain a mixture containing an ethylenically unsaturated acid and one or more reversible adduct of the conjugated diene and the ethylenically unsaturated acid; and (b) removing unreacted conjugated diene, and the reversible adducts of the conjugated diene from the reaction mixture; and (c) reacting the mixture obtained in step (b) containing the ethylenically unsaturated acid further with carbon monoxide and water to obtain the dicarboxylic acid. | 05-21-2009 |
| 20090192287 | Method of Evaluating Polymide Dissolution Rate, Method of Producing Polymide, and Polymide Obtained Using Same Methods - A method of evaluating the dissolution rate of a polyimide by Raman spectroscopy, wherein the Raman spectral intensity I(a) of imide groups contained within the polyimide is measured, and I(a) is then compared with the Raman spectral intensity I(b) of imide groups contained within a polyimide with a known dissolution rate. The polyimides are preferably obtained using an aromatic tetracarboxylic dianhydride and/or an aromatic diamine. | 07-30-2009 |
| 20100029894 | POLYAMIDE POLYMER - The instant invention provides polyamides, processes for making the polyamides, and articles comprising the polyamides. | 02-04-2010 |
| 20100168375 | PRODUCTION OF SOLUTIONS OF DIACID/DIAMINE SALTS - Solutions of a salt of a diamine and of a diacid, more particularly concentrated solutions of hexamethylene diammonium adipate salt (“nylon salt”), useful starting materials for the production of polyamides, more specifically of PA66, are prepared by mixing a diacid and a diamine, at a salt concentration by weight of from 50% to 80%, in a first stage, to provide aqueous solutions of diacid and diamine having a diacid/diamine molar ratio of greater than 1.1 and, in a second stage, adjusting the diacid/diamine molar ratio, by adding diamine, to a value of from 0.9 to 1.1, preferably from 0.99 to 1.01, and in fixing the salt concentration by weight by, optionally, adding water thereto. | 07-01-2010 |
| 20110082276 | TRANSPARENT POLYIMIDE FILM HAVING IMPROVED SOLVENT RESISTANCE - Disclosed herein is a transparent polyimide film having improved solvent resistance, the outer form of which is not changed by swelling or dissolving even when it is immersed in a polar solvent. | 04-07-2011 |
| 20110144300 | BATCH PROCESS FOR PREPARING POLYAMIDES - Polyamides based on dicarboxylic acids and on diamines are produced in a batch process by
| 06-16-2011 |
| 20110288266 | HEAT-SHRINKABLE FILM - A heat-shrinkable film including at least one gas-barrier layer (A). The gas-barrier layer (A) is made of a stretched film of a polyamide resin which is obtained from a diamine component comprising 70 mol % or more of m-xylylenediamine and a dicarboxylic acid component comprising 80 to 98 mol % of α,ω-linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms and 2 to 20 mol % of isophthalic acid. The polyamide resin has a moderate crystallization speed and does not cause whitening even when stretched at low temperature, to provide a heat-shrinkable film combining high heat shrinkability and high transparency. | 11-24-2011 |
| 20120077953 | SYNTHESIS OF TRI-COMPONENT RESINS - A resinous compound of the formulas | 03-29-2012 |
| 20120329981 | PROCESS TO PRODUCE VALEROLACTONE FROM LEVULINIC ACID - The invention provides a process for the preparation of valerolactone, said process comprising reacting levulinic acid with hydrogen by using a solid Ru catalyst, characterised in that the process is carried out in the presence of at least 0.08% (w/w) water relative to the amount of levulinic acid. Said process may be faster and more selective. This process advantageously allows the production of valerolactone from renewable sources. | 12-27-2012 |
| 20130066041 | POLYAMIDE RESIN - Provided is a polyamide resin having excellent color tone and elastic modulus, excellent gas barrier properties and low water absorption. The polyamide resin comprises a diamine structural unit and a dicarboxylic acid structural unit, wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine (A-1) and/or bis(aminomethyl)cyclohexane (A-2) and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid (B), characterized in that it has a sulfur atom concentration of 1 to 200 ppm by mass. | 03-14-2013 |
| 20130144028 | PROCESSES FOR PRODUCING DIAMINOBUTANE (DAB), SUCCINIC DINITRILE (SDN) AND SUCCINAMIDE (DAM) - Processes include providing a clarified diammonium succinate (DAS)- or monoammonium succinate (MAS)- containing fermentation broth; distilling the broth of an overhead that includes water and ammonia, and a liquid bottoms that includes SA, and at least about 20 wt % water; cooling the bottoms to a temperature sufficient to cause the bottoms to separate into a liquid portion in contact with a solid portion that is substantially pure SA; separating the solid portion from the liquid portion; and converting the solid portion to produce nitrogen containing compounds such as diamino butane (DAB), succinic dinitrile (SDN), succinic amino nitrile (SAN) or succinamide (DAM) and downstream products. | 06-06-2013 |
| 20130172519 | PROCESSES FOR PRODUCING DIAMINOBUTANE (DAB), SUCCINIC DINITRILE (SDN) AND SUCCINAMIDE (DAM) - Processes that make nitrogen-containing compounds include converting succinic acid (SA) or monoammonium succinate (MAS) derived from a diammonium succinate (DAS)- or MAS-containing fermentation broth to produce such compounds including diaminobutane (DAB), succinic dinitrile (SDN), succinic amino nitrile (SAN), succinamide (DAM), and related polymers. | 07-04-2013 |
| 20130211039 | PROCESS FOR THE PRODUCTION OF PA-410 AND PA-410 OBTAINABLE BY THAT PROCESS - A process for the production of a polymer containing monomer units of butane-1,4-diamine and 1,10-decanedioic acid (PA-410) comprising the steps of: 1) making a solution of a salt of butane-1,4-diamine and 1,10-decanedioic acid in water, 2) concentrating the solution of the salt at a temperature of between 100 and 180° C. and a pressure of between 1.0 and 3.0 bar to a water content of between 4 and 8 wt %, 3) producing from the salt a prepolymer containing monomer units of butane-1,4-diamine and 1,10-decanedioic acid at a temperature of between 185 and 205° C. and 4) post condensation of the prepolymer. Also claimed is PA-410 having a viscosity number (VN) of at least 100 ml/gram. | 08-15-2013 |
| 20130274435 | POLYMER POWDER WITH MODIFIED MELTING BEHAVIOUR - The present invention provides precipitated polymer powders based on a polyamide of the AABB type, obtained by the reprecipitation of the polyamides by at least partial dissolution followed by continuous cooling of the solution to below the precipitation temperature. The polyamides are prepared by polycondensation of diamines with dicarboxylic acids. The precipitated polyamides obtained are used in layer-by-layer shaping processes such as selective laser sintering. | 10-17-2013 |
| 20130324694 | PROCESSES FOR PRODUCING HEXAMETHYLENEDIAMINE (HMD), ADIPONITRILE (ADN), ADIPAMIDE (ADM) AND DERIVATIVES THEREOF - Processes for producing nitrogen containing compounds include producing hexamethylenediamine (HMD), adiponitrile (ADN), adipamide (ADM) and derivatives thereof from adipic acid (AA) obtained from fermentation broths containing diammonium adipate (DAA) or monoammonium adipate (MAA). | 12-05-2013 |
| 20130338333 | METHOD FOR PRODUCING POLYAMIDE RESIN - The present invention is a method for producing a polyamide resin, wherein a nylon salt obtained from a dicarboxylic acid and a diamine having a boiling point exceeding 100° C. is heated to be polymerized under normal pressure while water vapor is being allowed to be present in the polymerization reaction system. | 12-19-2013 |
| 20140135471 | PROCESSES FOR PRODUCING BUTANEDIOL (BDO), DIAMINOBUTANE (DAB), SUCCINIC DINITRILE (SDN) AND SUCCINAMIDE (DAM) - Processes that, make nitrogen-containing compounds include converting succinic acid (SA) or monoammonium succinate (MAS) derived from a diammoniurn succinate (DAS)- or MAS-containing fermentation broth to produce such compounds Including diammobmane (DAB), succinic dinitrile (SDN), succinic amino nitrile (SAN), succinamide (DAM), and related polymers. | 05-15-2014 |
| 20140296472 | PROCESS FOR THE PREPARATION OF POLYAMIDES - The disclosures herein relate to a process for making polyamides from stoichiometrically imbalanced mixtures. This process includes the production and subsequent use of solidified stoichiometrically imbalanced components comprising mixtures of diacids and diamines. This stoichiometric imbalance is defined by a component molar ratio equal to moles of dicarboxylic acid units divided by moles of diamine units; and wherein this molar ratio is different from unity. This process comprises steps of: a) forming an acid-rich solidified first component in a dry or moisture containing state by; b) contacting at least a dicarboxylic acid with at least a diamine in a molar ratio of greater than 1:1; c) forming an amine-rich solidified second component in a dry or moisture containing state by; d) contacting at least a dicarboxylic acid with at least a diamine in a molar ratio of less than 1:1; e) contacting the acid-rich first component with the amine-rich second component in a molten state or a solution state and f) forming a first composition having a composition molar ratio g) such that a total dicarboxylic acid content and a total diamine content, supplied by said first and second components, is from about 0.95 to about 1.05; h) heating the first composition with agitation in the molten state and under pressure to a sufficiently high temperature for a polyamidation reaction to and subsequently, i) forming a second composition comprising a polyamide. | 10-02-2014 |
| 20150045532 | POLYETHER POLYAMIDE ELASTOMER - Provided is a polyether polyamide elastomer including a diamine constituent unit derived from a specified polyether diamine compound and a xylylenediamine and a dicarboxylic acid constituent unit derived from an α,ω-linear aliphatic dicarboxylic acid having a carbon number of from 8 to 20. | 02-12-2015 |
| 20150361468 | METHODS, REAGENTS AND CELLS FOR BIOSYNTHESIZING COMPOUNDS - This document describes biochemical pathways for producing glutaric acid, 5-aminopentanoic acid, 5-hydroxypentanoic acid, cadaverine or 1,5-pentanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C5 backbone substrate such as 2-oxoglutarate. | 12-17-2015 |
| 20160059200 | MULTIPLE HEAT-TRANSFER MEDIA - The present invention relates to methods, systems, and apparatus for making polyamides having at least two heat-transfer media. The method includes heating a first flowable heat-transfer medium, to provide a heated first flowable heat-transfer medium. The method includes transferring heat from the heated first flowable heat-transfer medium to a second flowable heat-transfer medium, to provide a heated second flowable heat-transfer medium. The method also includes transferring heat from the heated second flowable heat-transfer medium to at least one polyamide-containing component of a polyamide synthesis system. | 03-03-2016 |
| 20160060395 | METHODS AND SYSTEMS FOR THE RECOVERY OF WATER FROM A POLYAMIDE SYNTHESIS PROCESS - The present disclosure relates to systems and methods for manufacturing a polyamide. The method can include obtaining, from a reservoir, an aqueous solution comprising a dicarboxylic acid, a diamine, and water having a substantially liquid phase; concentrating the aqueous solution including transforming a portion of the water having a substantially liquid phase to water having a substantially gaseous phase; condensing the water having a substantially gaseous phase into condensed water having a substantially liquid phase; removing at least one impurity from at least one of the condensed water having a substantially liquid phase and the water having a substantially gaseous phase to produce cleaned water having a substantially liquid phase; and reusing the cleaned water having a substantially liquid phase. The system can include, among other things, a reservoir; an evaporator assembly, in fluid communication with the reservoir; a condensation assembly, in fluid communication with the evaporator assembly; a collection assembly; and a conduit network. | 03-03-2016 |
| 20160068632 | NYLON SALT SOLUTION PRODUCTION FROM A PARTIALLY BALANCED ACID SOLUTION - A continuous process for producing a nylon salt solution prepared using a liquid partially balanced acid solution enriched in dicarboxylic acid, and in particular adipic acid. The liquid feed is prepared by metering dicarboxylic acid powder, based on weight, from a loss-in-weight feeder to a feeding conduit that transfers the dicarboxylic acid powder into an in-line disperser; feeding a first feed stream of diamine to the in-line disperser to form a dispersion comprising between 32 wt. % and 46 wt. % dicarboxylic acid, between 11 wt. % and 15 wt. % diamine, and between 39 wt. % and 57 wt. % water, and heating the dispersion at temperature between 50 C and 60 C to form a partially balanced acid solution. A nylon salt solution is prepared from the liquid partially balanced acid solution and continuously withdrawn into a storage tank. The nylon salt solution has a uniform pH and is suitable for producing nylon polymers. | 03-10-2016 |
| 20160068634 | FEED FORWARD PROCESS CONTROLS FOR NYLON SALT SOLUTION PREPARATION PROCESSES - Disclosed are process controls for controlling the continuous preparation of nylon salt solution. The process controls include feed forward controls. A model is generated to achieve a target pH and/or salt concentration. Feed rates are set for each of a dicarboxylic acid monomer, a diamine monomer, and/or water to a single continuous stirred tank reactor. The dicarboxylic acid is metered, based on weight, from a loss-in-weight feeder to the reactor. The nylon salt solution is formed continuously and has low variability from a target pH and/or a target salt solution concentration. The nylon salt solution is transferred directly to a storage tank, without further monomer addition, pH adjustment, or salt solution adjustment after exiting the continuous stirred tank reactor. | 03-10-2016 |
| 20160075827 | NYLON SALT SOLUTION PREPARATION PROCESSES WITH TRIM DIAMINE - Disclosed are nylon salt solution preparation processes including a trim diamine feed. The nylon salt solution is prepared by feeding a dicarboxylic acid monomer and a diamine monomer to a single continuous stirred tank reactor. The dicarboxylic acid is metered, based on weight, from a loss-in-weight feeder to the reactor. The nylon salt solution is formed continuously and has low variability from a target pH and/or a target salt solution concentration. The nylon salt solution is transferred directly to a storage tank, without further monomer addition, pH adjustment, or salt solution adjustment after exiting the continuous stirred tank reactor. | 03-17-2016 |
