Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7989579 | Production of a functionalized polytriazole polymer A method for the production of a functionalized polytriazole polymer, particularly a poly(1,2,4-triazole)-polymer, includes the steps of (a) mixing a hydrazine salt, particularly hydrazine sulfate, with at least an aromatic and/or heteroaromatic dicarboxylic acid an... | 08/02/2011 |
| 7504475 | Process for a two stage melt polymerization for the production of polybenzimidazole A process is presented for the production of high molecular weight polybenzimidazole, in two steps. Step one: provide a first reaction vessel and charge it with at least one aromatic hydrocarbon tetraamine, and a heterocyclic ring making up the dicarboxylic componen... | 03/17/2009 |
| 7408018 | Elastomeric functional biodegradable copolyester amides and copolyester urethanes The invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers are based on α-amino acids and possess physical, chemical and biodegradation properties that render them suitable for use in the ... | 08/05/2008 |
| 7388035 | Method for preparing poly(2,5-benzimidazole) A method for preparing poly(2,5-benzimidazole) whereby 3,4-diaminobenzoic acid is polymerized using a dehydrating reagent containing P2O5 and CX3SO3H where X is H or F. The poly(2,5-benzimidazole) has good proton conductiv... | 06/17/2008 |
| 7368009 | Carbon fine particle structure and process for producing the same, carbon fine particle transcriptional body for producing the same, solution for producing carbon fine particle structure, carbon fine particle structure, electronic device using carbon fine particle structure and process for producing the same, and integrated circuit A carbon fine particle structure containing plural carbon fine particles having a graphite structure and a crosslinked part containing plural functional groups chemically bonded to each other, at least one ends of each of the functional groups being connected to dif... | 05/06/2008 |
| 7332530 | Proton-conducting polymer membrane comprising a polymer with sulphonic acid groups and use thereof in fuel cells The present invention relates to a proton-conducting polymer membrane comprising polymers containing sulfonic acid groups, obtainable by a process comprising the steps of A) mixing vinyl-containing sulfonic acid with one or more aromatic tetraamino comp... | 02/19/2008 |
| 7314906 | High molecular weight stereoregular head-tail poly(glucaramides) A method of producing high molecular weight stereoregular head, tail-poly(alkylene D-glucaramides) is described. Amidoamino acids are esterified in cold alcohol and then polymerized in a protic solvent to form steroregular prepolymers. The prepolymers are then furth... | 01/01/2008 |
| 7304122 | Elastomeric functional biodegradable copolyester amides and copolyester urethanes The present invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers that are based on α-amino acids and possess suitable physical, chemical and biodegradation properties. The polymers are u... | 12/04/2007 |
| 7294672 | Method to form polymeric materials by reverse suspension/emulsion polymerization and compositions formed using that method A method to form a polymeric material is disclosed. The method provides a water immiscible solvent and one or more condensation monomers, where those one or more condensation monomers are essentially insoluble in the water immiscible solvent. The one or more condens... | 11/13/2007 |
| 7230067 | Masterbatch and production method of oxygen-absorbing molded article In the present invention, a masterbatch is produced by melt-mixing a metal compound (B) with a reactive thermoplastic resin (C). The oxidizable polyamide (A) is produced by polycondensing a diamine component containing m-xylylenediamine in an amount of 70 mol % or h... | 06/12/2007 |
| 7148269 | Interfacial polymer incorporation of nanotubes A method for producing a composite material containing nanotubes and an interfacial polymer, and a composite material made by the method. The method involves contacting two mutually insoluble monomer solutions, at least one of which contains nanotubes, to provide an... | 12/12/2006 |
| 7138482 | Production method of polyamide In the production method of polyamide of the present invention, the mole balance at a set point during melt polymerization is estimated from a pre-established equation for calculating the mole balance during melt polymerization from a melt viscosity. On the basis of... | 11/21/2006 |
| 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 |
| 7122618 | Quaternary polyamidoamines, the production thereof, corresponding agents and the use thereof The present invention relates to quaternized polyamidoamines which have at least one structural unit of the formula VII in which R1, R2, R4 | 10/17/2006 |
| 7091306 | Process for preparing polyalkenylsuccinimides The present invention relates to an improved process for preparing polyalkenylsuccinimides having a sediment level less than 0.1 vol % comprising the steps of: (a) preparing a polyalkenyl derivative of an unsaturated acidic reagent... | 08/15/2006 |
| 7078477 | Process for producing solvent-soluble polyimide In the process of the present invention, a solvent-soluble polyimide is produced by polycondensing at least one tetracarboxylic acid component with at least one diamine component in a solvent in the presence of a tertiary amine. The tetracarboxylic acid component is... | 07/18/2006 |
| 7074851 | Method for making stabilised polyamide compositions The invention relates to a process for preparing stabilized compositions based on polyamide. The stabilizer is a phosphorus stabilizer selected from phosphorous acid and hypophosphorous acid. It is introduced before or during the polymerization of the polyamide. The... | 07/11/2006 |
| 7060332 | Liquid crystal display with alignment film of polyphenylenphthalamide-based material and method for fabricating the same An LCD and a method for fabricating the LCD includes a first substrate and a second substrate, a liquid crystal layer between the first substrate and the second substrate, and a coating of a polyphenylenephthalamide based material on at least one of the substrates, ... | 06/13/2006 |
| 7060782 | Process for a two stage melt polymerization for the production of polybenzimidazole having an improved solid state polymerization A process for the production of high molecular weight polybenzimidazole by one: providing a first reaction vessel; charging the reaction vessel with at least one aromatic hydrocarbon tetraamine, and a heterocylic ring making up the dicarboxylic component; heating th... | 06/13/2006 |
| 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 |
| 7053171 | Production method of polyamide In the production method of the present invention, the polyamide is produced by the polycondensation of a diamine component and a dicarboxylic acid component comprising a straight-chain α,ω-aliphatic dicarboxylic acid and an aromatic dicarboxylic acid. The dicarbo... | 05/30/2006 |
| 7053169 | Polyamide molding compounds for producing optical lenses The invention relates to new thermoplastically processible transparent polyamide molding materials based on copolyamides containing diamines and dicarboxylic acids with aromatic cores which exhibit a high index of refraction nD20 over 1.59 and ... | 05/30/2006 |
| 7053172 | Fuel-barrier polyamide resin and multilayer shaped article The fuel-barrier polyamide resin of the present invention is a product of the polycondensation of a diamine component comprising 70 mol % or higher of m-xylylenediamine and a dicarboxylic acid component comprising 70 mol % or higher of a mixed dicarboxylic acid whic... | 05/30/2006 |
| 7038007 | Process for a continuous polymerization for the production of high molecular weight polybenzimidazole A process for a single-stage melt polymerization for the production of a high molecular weight polybenzimidazole which comprises the steps of: providing a reaction vessel having a means for agitation and a means for vacuum; charging the reaction vessel with reactant... | 05/02/2006 |
| 7038006 | Polyamide and resin composition A polyamide obtained by polycondensation of a diamine component containing at least 50 mol % of 2-methyl-1, 5-pentanediamine and a dicarboxylic acid component containing at least 50 mol % of azelaic acid, comprising the following p... | 05/02/2006 |
| 7026435 | Water-dispersible, hydrophobic polyalkyleneimine polyamide fiberglass lubricant, process for producing the same, and method of use therefor Polymer derivatives based upon polyalkyleneimine backbones having from about 20% to about 60% of their reactive amino functionalities substituted by C14-20 carboxylic acids, are disclosed. Fiber lubricants and/or sizing compositions comprising such polyme... | 04/11/2006 |
| 7009030 | High-melting wax useful for sintering metals A wax containing the reaction product of: (a) a C6–C12 linear dicarboxylic acid; and (b) a diamine of formula H2N(CH2)nNH2, wherein n is an integer from 2 to 6, and the molar ratio of the C6 | 03/07/2006 |
| 7009029 | Polyamide composition Provided is a polyamide composition comprising 100 parts by weight of (A) a polyamide having dicarboxylic acid units containing 60 to 100 mol % of terephthalic acid units, and diamine units containing 60 to 100 mol % of 1,9-nonanediamine units and/or 2-methyl-1,8-oc... | 03/07/2006 |
| 6997971 | Cross-linked polybenzimidazole membrane for gas separation A cross-linked, supported polybenzimidazole membrane for gas separation is prepared by reacting polybenzimidazole (PBI) with the sulfone-containing crosslinking agent 3,4-dichloro-tetrahydro-thiophene-1,1-dioxide. The cross-linked reaction product exhibits enhanced ... | 02/14/2006 |
| 6995233 | Process for manufacturing polyamides The invention relates to a continuous process for manufacturing polyamides. The polyamides are of the type obtained from diacids and diamines. The process comprises an operation of continuous mixing of a compound which is rich in amine end groups and a compound whic... | 02/07/2006 |
| 6958381 | Polyamide A process for preparing polyamides comprises polymerizing starting monomers in the presence of from 2.3 to 10 mmol, based on 1 mol of carboxamide group of the polyamide, of a chain regulator containing a nitrile group and a functional group capable of forming a carb... | 10/25/2005 |
| 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 |
| 6946015 | Cross-linked polybenzimidazole membrane for gas separation A cross-linked, supported polybenzimidazole membrane for gas separation is prepared by layering a solution of polybenzimidazole (PBI) and α,α′dibromo-p-xylene onto a porous support and evaporating solvent. A supported membrane of cross-linked poly-2,2′-(m-phen... | 09/20/2005 |
| 6943231 | Transparent polyamide molding materials having improved transparency, resistance to chemicals and high permanent fatigue strength Transparent polyamide molding materials are provided which are characterized in that they have a melting enthalpy between 0 and 12 J/g and the polyamides are constituted of 100 mole-% of a diamine mixture having 10-70 mole-% of PACM [bis-(4-amino-cyclohexyl)-... | 09/13/2005 |
| 6942757 | Process for preparing para-aromatic polyamide paper A process for producing a paper made essentially of a para-aromatic polyamide and having agglutinate portions, the process including subjecting to papermaking a composition comprising at least one member selected from the group of short fibers, staple fibers, pulp a... | 09/13/2005 |
| 6930165 | Modified polyamides, compositions based on same and macromolecular compounds used to obtain them The invention concerns polyamides modified by a multifunctional compound. Finished articles formed from said polyamides or from compositions based on said polyamides exhibit excellent mechanical properties, and a very good surface appearance. The modified polyamide ... | 08/16/2005 |
| 6916901 | Production of polyamide The present invention provides a method for the production of polyamide 6 by the hydrolytic polymerization of ε-caprolactam, in which, in the first step, caprolactam ring opening occurs under the action of water and, in the following steps, polycondensation is perf... | 07/12/2005 |
| 6916549 | In situ fluoropolymer polymerization into porous substrates The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to degradation by wetting and staining, and wood, to improve resistance to degradation, staining and warping. ... | 07/12/2005 |
| 6906127 | Intercalates, exfoliates and concentrates thereof formed with low molecular weight; nylon intercalants polymerized in-situ via ring-opening polymerization Nylon-intercalated (concentrate nylon), layered silicates, in concentrated form, containing at least 6% to about 40% by weight layered silicate, preferably about 8% to about 30% by weight layered silicate, intercalated with a nylon that is polymerized while in conta... | 06/14/2005 |
| 6906147 | Catalytic systems This invention relates to single-component and multi-component catalytic systems using aryl titanates. Aryl titanate compounds are useful as catalysts and co-catalysts in single-component and multi-component catalytic systems (e.g., for the polymerization of macrocy... | 06/14/2005 |
