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| Number | Title | Issue Date |
| 7696301 | Marine umbilical comprising hydrolysis resistant polyamides Marine umbilicals are provided comprising polyamide compositions having good hydrolysis resistance and that may optionally contain plasticizer. ... | 04/13/2010 |
| 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 |
| 7388048 | Flexible semiaromatic polyamides with a low moisture uptake The present invention relates to a flexible semiaromatic polyamide composition with a low moisture uptake comprising, by weight, the total being 100: 60 to 99.5% (preferably 70 to 93%) of at least one copolyamide of formula X/Y,Ar ... | 06/17/2008 |
| 7381788 | Method for continuous production of polyamide Provided is a continuous production method of a polyamide with stabilized polymerization degree and good quality, particularly an aromatic-containing polyamide. A continuous production method of a polyamide, comprising (a) a raw material preparation step of individu... | 06/03/2008 |
| 7303792 | Diaminobenzene derivative, polyimide precursor and polyimide obtained therefrom, and aligning agent for liquid crystal The present invention provides a novel diamine which is especially useful as a material for a resin for a liquid crystal alignment film, a polyimide precursor and a polyimide synthesized by using the diamine, and a treating agent for liquid crystal alignment contain... | 12/04/2007 |
| 7261849 | Tacky polymer melt spinning process A method for high speed melt spinning of binder fiber by melting a polymer having a melting temperature range of greater than 0° C. to 160° C., spinning said polymer at a speed of greater than about 2000 meters per minute to form the binder fibers; and winding the... | 08/28/2007 |
| 7258920 | Multiphase fiber materials and compositions, methods of manufacture and uses thereof A pre-fiber composition is disclosed herein that includes: a) a first fiber constituent having a first melting point; b) a second fiber constituent having a second melting point; and c) a gelling agent that solvates at least one of the first fiber constituent or the... | 08/21/2007 |
| 7211308 | Formation of multilayer sheets containing PCTFE and COC for blister packaging applications Multilayer sheets and films are provided that include a layer of a fluoropolymer material and a layer of a thermoplastic polymer material. More particularly, an adhesive material and multilayered structures formed therewith are provided in which a layer of a fluorop... | 05/01/2007 |
| 7163996 | Polyamides Polyamides useful as hotmelt adhesives and having improved resistance to hydrocarbons such as gasoline are obtained by reacting a) an acid component containing at least one C6 to C22 aliphatic dicarboxylic acid and b) an amine component contain... | 01/16/2007 |
| 7160979 | Polyamides The reaction of dimer acids, C6 to C18 aliphatic dicarboxylic acids, dimer amines, alkylene diamines having from 2 to 8 carbon atoms, and polyoxyalkylene diamines provides polyamides having excellent cold flexibility, high heat resistance, and ... | 01/09/2007 |
| 7138080 | Polyamide molding compositions A thermoplastic molding composition comprising polyamide is disclosed. The composition that contains vinyl (co)polymer and an optional solvent is useful in application where inhibited crystallization of polyamide is desirable, including laser-welding. ... | 11/21/2006 |
| 7057008 | Packaging and containers made of water-soluble polyamides and processes for their manufacture Packaging materials made from water-soluble nylons are disclosed, that readily contain materials such as caustic chemicals and upon exposure to water dissolve to provide for the release of the chemical into an aqueous environment. The materials are made from select ... | 06/06/2006 |
| 7022214 | Carrier ampholytes of high pH range Carboxylic acid-substituted polyalkylene polyamines in which amine nitrogen atoms on the polyamine backbone structure are replaced by guanidine groups provide a pH range extending into high pH values. These substances are useful as carrier ampholytes in isoelectric ... | 04/04/2006 |
| 7001979 | Polyamide and composition and article including same A polyamide that includes the reaction product of dimer acid (e.g. a dimer acid including at least 98% by weight dimer), caprolactam, hexamethylene diamine, sebacic acid, and optionally, chain terminating agent. ... | 02/21/2006 |
| 6969552 | Resin composition containing a reducing agent to be used in a multi-layer laminate for storing liquid foods A pellet to be used in a multi-layer laminate for storing liquid foods, comprising a hydrophilic reducing organic compound and a hydrophilic and water insoluble thermoplastic resin, wherein the hydrophilic reducing organic compound is kneaded with the hydrophilic an... | 11/29/2005 |
| 6964798 | Multi-layered polymer based thin film structure for medical grade products A multiple layer structure comprising a first and a second skin layer, each skin layer composed of a polypropylene containing polymer, and a radio frequency (“RF”) susceptible layer adhered to and between the first and second skin layers. The RF layer has a firs... | 11/15/2005 |
| 6956099 | Polyamide-polyether block copolymer Copolymers having linked internal polyether blocks and internal polyamide blocks have advantageous physical properties and solvent-gelling abilities. The copolymer may be prepared from a reaction mixture that contains 1,4-cyclohexane dicarboxylic acid (CHDA) and pol... | 10/18/2005 |
| 6916919 | Isolation of DNA molecules The present invention relates to a process for separating nucleic acid molecules, preferably open circular and supercoiled plasmid DNA and RNA molecules from each other, comprising the steps of providing a solution comprising the molecules; adsorbing the molecules t... | 07/12/2005 |
| 6872800 | Hyperbranched copolyamide, composition based on said hyperbranched copolyamide and method for obtaining same The invention relates to hyperbranched copolyamides (HBPAs), to their production and to their use as additives, in particular as melt viscosity modifiers in thermoplastic polymer compositions. This copolyamide is obtained by a reaction between a monomer (I): ... | 03/29/2005 |
| 6835799 | Intrinsically gel-free, randomly branched polyamide The invention relates to a randomly branched polyamide comprising at least units derived from: 1. AB monomers, 2. at least one compound I, being a carboxylic acid (Av) having a functionality v≧2 or an amine (Bw) havi... | 12/28/2004 |
| 6831137 | Impact resistant transparent polyamide alloys The invention concerns a transparent polyamide alloy, produced by compounding it from 30-98% by weight of a transparent, amorphous, rigid and brittle polyamide A with at least 35 mole % cyclo-aliphatic diamine and a glass transition point of at least 150° C., and 2... | 12/14/2004 |
| 6818732 | Transition metal initiators for controlled poly (beta-peptide) synthesis from beta-lactam monomers A series of initiators based on transition metal complexes for the polymerization of optically active beta-lactams into poly-beta-peptides and block copolymers have been developed. These initiators are unique in being able to eliminate chain transfer and chain termi... | 11/16/2004 |
| 6815527 | Continuous method for producing polyamides from aminonitriles The continuous process for preparing a polyamide by reacting at least one aminonitrile with water comprises: (1) reacting at least one aminonitrile with water in the presence of an organic liquid diluent at from 90 to 400° C. and ... | 11/09/2004 |
| 6812324 | Method for preparing nylon 6 copolymer containing sulfonate comonomers A method for preparing nylon 6 copolymer containing 5-sulfoisophthalate salts comonomer. The method includes the steps of reacting 5-sulfoisophthalate salts ester with aliphatic diamine in a molar ratio of 2˜20 at 160˜200° C., followed by completely removing the ... | 11/02/2004 |
| 6703475 | Method for the continuous production of copolyamides based on a lactam (I), a diamine (II) and a dicarboxylic acid (III) A process for continuous production of copolyamides based on a lactam (I), a diamine (II) and a dicarboxylic acid (III) comprises reacting a mixture (IV) comprising a diamine (II), a dicarboxylic acid (III) and water in a first reaction zone at a pressure ... | 03/09/2004 |
| 6699960 | Method for producing polyamides from dinitriles and diamines A polyamide is prepared by reacting at least one dinitrile and at least one diamine with water at a temperature from 90 to 400° C. and a pressure from 0.1 to 50*106 Pa in a molar ratio of at least 1:1 for water to the sum total of dinitrile an... | 03/02/2004 |
| 6590063 | Low-melting copolyamide and their use as hot-melt adhesives Copolyamides, consisting of polycondensation products of the following components: caprolactam 10 to 45 mol-%, laurolactam 30 to 55 mol-%, at least 2 dicarboxylic acids 20 to 50 mol-% of the following compounds, aliphatic ,ω-dicarboxylic acids wit... | 07/08/2003 |
| 6579965 | Process for the anionic polymerization of lactams For the anionic polymerization of lactams: (a) (i) a catalyst capable of creating a lactamate and (ii) a regulator chosen from amides of formula R1-NH--CO-R2, in which R1 can be substituted by an R3-CO--NH-- or R3-0-- radical and in which R1, R2 and R3 de... | 06/17/2003 |
| 6569988 | Method for the production of polyamides In a process for producing polyamides, a mixture comprising hexamethylenediamine and aminocapronitrile and obtained from the hydrogenation of adiponitrile is reacted with water and a dicarboxylic acid.... | 05/27/2003 |
| 6569598 | Solvent resistant photosensitive compositions Photoresist compositions and methods are provided for preparing photoresist films that are stable and impermeable to a broad range of organic solvents. Photoresist films provided herein may be photopatterned by selectively applying light, and may be strip... | 05/27/2003 |
| 6548626 | Method for preparing polyamides from lactams and polyamide extracts A process for producing polyamides by reacting at least one lactam and optionally further polyamide-forming monomers with aqueous monomer and oligomer extracts obtained during the extraction with water of the polymer product obtained in the production of ... | 04/15/2003 |
| 6531570 | Accelerator for the production of polyamides from aminonitriles Disclosed are the use of lactams, aminocarboxylic acids or mixtures thereof as acceleratant or cocatalyst in the production of polyamides from aminonitriles and water, and a suitable process therefor.... | 03/11/2003 |
| 6525167 | Method for producing polyamide 6 of a low extract content, high viscosity stability and low remonomerization rate The continuous process for producing polyamides by reacting at least one aminonitrile with water comprises the following steps: (10) reacting at least one aminonitrile with water at a temperature of from 200 to 290° C. at a pressure of from 40 to 70 bar in a ... | 02/25/2003 |
| 6509439 | Process for the production of polyamides from dinitriles and diamines A process for producing polyamides from dinitriles and diamines in a continuous reaction using subsequent heating steps. In particular, the process involves contacting a dinitrile, a diamine, water, and optionally a catalyst to form a reaction mixture; he... | 01/21/2003 |
| 6479620 | Process for converting caprolactam to nylon 6 A process for making nylon 6, in which caprolactam and water are reacted in a multistage reactive distillation column.... | 11/12/2002 |
| 6472501 | Process for making nylon 6,6 Process for making Nylon 6,6 by reacting adiponitrile, hexamethylenediamine and steam in a multistage distillation column reactor.... | 10/29/2002 |
| 6423304 | Dimerized fatty acid based polyamides useful for clear candle and gel applications Blooming and/or syneresis in gel formulations can be reduced or eliminated by adding to an organic mixture an effective amount of a polyamide gelling agent having a softening point of less than about 105° C. wherein the polyamide is the reaction product ... | 07/23/2002 |
| 6391982 | Highly branched polyamide graft copolymers A graft copolymer is prepared by a process comprising: graft polymerizing a polyamide-forming monomer selected from the group consisting of lactams and ω-aminocarboxylic acids and an oligocarboxylic acid selected from the group consisting of from 0.015 to ... | 05/21/2002 |
| 6355769 | Partially aromatic polyamides and a process for making them A process for making partially aromatic polyamides is provided in which an aromatic dicarboxylic acid component, at least 20-100% by weight of the dicarboxylic acid in the acid component is in the form of an alkylated ester, and a diamine component, compr... | 03/12/2002 |
| 6310173 | Batch process for producing polyamides from aminonitriles The batch process for producing a polyamide by reaction of a mixture comprising at least one aminonitrile, and optionally monomers useful for polyamide production, with water, comprises the following steps: (1) reacting the mixture with water at a temperature ... | 10/30/2001 |
