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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8178591 | Carbon dioxide blown low density, flexible microcellular polyurethane elastomers Microcellular polyurethane flexible foams having densities no greater than 0.3 g/cc which are suitable for use as lightweight shoe sole components are produced with carbon dioxide in an amount such that the polyurethane-forming mixture has a free rise density of fro... | 05/15/2012 |
| 8110704 | Process for the production of stable polymers Stable NCO prepolymers are produced from polyisocyanates having a melting point greater than 70° C., preferably, naphthalene diisocyanate, having advantageous physical properties. An important feature of the process of the present invention is the rapid cooling of ... | 02/07/2012 |
| 8110621 | Castor oil-based polyol emulsions A polyol emulsion of castor oil and monoepoxides is combined with methylenediphenyl diisocyanate (MDI) and cement to produce a polymer cement. ... | 02/07/2012 |
| 8110073 | Process for the preparation of aromatic amines Aromatic amines are produced by catalytic hydrogenation of aromatic nitro compounds. The reaction mixture generated by this hydrogenation is then worked up by distillation in a manner which makes it possible to substantially free the amine of water with increased en... | 02/07/2012 |
| 8097751 | Process for preparing polyisocyanates by the adiabatic phosgenation of primary amines A two-stage process for the preparation of organic isocyanates by reacting primary amines with phosgene in which: a) in a first stage, amine and phosgene are reacted in an adiabatically managed reaction, in which the temperature of reaction is restricted to values b... | 01/17/2012 |
| 8097660 | Rigid polyurethane foams with low thermal conductivity and a process for their production Rigid closed-cell polyurethane foams with low k-factors are produced by reacting an organic polyisocyanate with an amine-based polyether polyol and a polyester polyol in the presence of a catalyst and a hydrofluorocarbon blowing agent, preferably, HFC-245fa. It is p... | 01/17/2012 |
| 8097658 | Process for the production of medium density decorative molded foams having good fire retardant properties with reduced mold times, fire retardant compositions and foams produced by this process Fire-resistant, medium density molded polyurethane foams which may be removed from a mold in substantially shorter times than previously possible are produced by the process of the present invention. These reduced de-mold times are achieved by including a solid flam... | 01/17/2012 |
| 7972676 | Process for the production of fibre-reinforced composite parts The invention relates to a process for the production of fiber-reinforced composite components in which an outer film is bonded with a layer containing fiber-reinforced polyurethane, characterised in that a) first an elastic interm... | 07/05/2011 |
| 7951896 | Process for the production of NCO prepolymers that are stable to sedimentation, and their use The present invention relates to NCO-terminated prepolymers that are stable to sedimentation, to a process for the production of these NCO-terminated prepolymers, and to the production of polyurethanes from these NCO-terminated polymers. ... | 05/31/2011 |
| 7921680 | Apparatus and process for treating an article to impart color and/or enhance the properties of that article A process and an apparatus for treating large articles to impart color or performance enhancing additives to the article in which a treatment system which includes: (i) a coloring solution and/or a solution containing at least one performance enhancing additive, (ii... | 04/12/2011 |
| 7893143 | Process for the preparation of self-extinguishing thermoplastic polyurethanes The present invention relates to a process for the preparation of self-extinguishing thermoplastic polyurethanes which optionally contain conventional additives and/or auxiliary substance. ... | 02/22/2011 |
| 7813839 | Process for controlling a production process A production process such as an isocyanate production process, conducted with a production facility having (a) at least two incoming streams, b) at least one exit stream and c) at least one inner recycling stream is controlled by adjusting at least one incoming stre... | 10/12/2010 |
| 7790804 | Process for stripping polymer polyols The invention provides a process for the purification of polymer polyols that ensures a reduction of acrylonitrile, styrene as well as the residual amounts of optionally used chain regulator, and of occurring recombination products of the initiator when azo initiato... | 09/07/2010 |
| 7772312 | Reinforced polyurethane-urea elastomers and their use The invention relates to reinforced polyurethane-urea elastomers with a specific urea content and a specific urethane content, to sheet polyurethane moldings with high surface energy and good lacquer adhesion produced therefrom, and to their use. ... | 08/10/2010 |
| 7754915 | Process for preparing isocyanates in the gas phase A process for preparing isocyanates in the gas phase, in which the mixing of the reactants and thus the reaction conditions are significantly improved by means of hydrodynamic measures such as increasing the turbulence of the feed stream in the central nozzle. As a ... | 07/13/2010 |
| 7750072 | Lowered exotherm thermoset compositions The present invention provides compositions such as a polymer grout, a molded plastic part, a void-filling plastic material, a concrete-anchoring material and a polymeric casting made from a thermosetting polymer chosen from vulcanized rubbers, polyoxybenzylmethylen... | 07/06/2010 |
| 7692042 | Process for preparing aniline Crude aniline is produced by hydrogenating nitrobenzene in the presence of a catalyst. This crude aniline is then purified by means of a single-step or multi-step distillation process in which aqueous alkali metal hydroxide solution is added to the crude aniline pri... | 04/06/2010 |
| 7671104 | Fine cell, water-blown rigid polyurethane foams The invention relates to a process for the production of water-blown, finely cellular rigid foams containing urethane groups and/or isocyanurate groups by the reaction of polyisocyanates with a polyol component in the form of an emulsion. The invention also relates ... | 03/02/2010 |
| 7670501 | Carbon dioxide blown low density, flexible microcellular polyurethane elastomers Microcellular polyurethane flexible foams having densities no greater than 0.3 g/cc which are suitable for use as lightweight shoe sole components are produced with carbon dioxide in an amount such that the polyurethane-forming mixture has a free rise density of fro... | 03/02/2010 |
| 7649108 | Process for the distillation of a mixture of isomeric diisocyanatodiphenylmethanes A mixture of isomeric diisocyanatodiphenylmethanes composed of at least 2,2′-diisocyanato-diphenylmethane, 2,4′-diisocyanatodiphenylmethane and 4,4′-diisocyanatodiphenyl-methane is distilled in at least one stage and a divided-wall column is used in at least o... | 01/19/2010 |
| 7622542 | Plastic moldings from optionally filled polyurethanes and their use The present invention relates to plastic moldings that are prepared from optionally filled polyurethanes. The plastic molding of the present invention exhibit high tenacity, flexural strength and heat stability. This invention also relates to a process for the prepa... | 11/24/2009 |
| 7619014 | Rigid polyurethane foams for insulation and process for producing same A rigid polyurethane foam having lose density without an increased k-factor can be produced by adding small amounts of butyl alcohol to a polyurethane composition containing an isocyanate, at least one polyol, a catalyst and a gaseous blowing agent. ... | 11/17/2009 |
| 7615662 | Process for the preparation of isocyanates in the gas phase Isocyanates are produced by reaction of primary amines with phosgene in the gas phase. In this process, the reaction is terminated by guiding the reaction mixture from the reaction chamber through a cooling stretch into which liquids are injected. Direct cooling tak... | 11/10/2009 |
| 7601762 | Polyvinylchloride/polyurethane hybrid foams with improved burn properties and reduced after-glow The present invention provides a rigid polyurethane foam comprising the reaction product, at an isocyanate index of from about 90 to about 400, of a polyisocyanate and a polyol component comprising, about 20 wt. % to about 80 wt. %, based on the weight of the polyol... | 10/13/2009 |
| 7601761 | Rigid polyurethane foams with increased heat performance The present invention provides a rigid polyurethane foam made from the reaction product, at an isocyanate index of from about 90 to about 400, of a polyisocyanate, and a polyol component containing about 20 to about 80 wt. %, based on the weight of the polyol compon... | 10/13/2009 |
| 7585681 | Method for evaluating binder distribution on a surface A method and apparatus for determining binder distribution on a sample in which a selected sample is contacted with a transfer medium in a manner such that at least 15% of any fluorescing binder present on the surface of the sample will be transferred to the transfe... | 09/08/2009 |
| 7560515 | PVC alloy for use in air bag doors A thermoplastic alloy of a melt processible crosslinked olefin thermoplastic elastomer dispersed in a PVC matrix. Improved compatibility of the alloyed components may be achieved through the use of a chlorinated olefin thermoplastic elastomer. The thermoplastic allo... | 07/14/2009 |
| 7555917 | Process for purification of anhydrous hydrogen chloride gas High boiling contaminants such as chloro-aromatic compounds are removed from a gas by compressing the gas containing the contaminant, cooling the compressed gas to reduce the temperature of the gas to at least 20° C. above the outlet temperature of a second cooling... | 07/07/2009 |
| 7553963 | Liquid partially trimerized and allophanized polyisocyanates based on toluene diisocyanate and diphenylmethane diisocyanate This invention relates to storage-stable, liquid, partially trimerized and allophanized polyisocyanates having an NCO group content of 15 to 41% by weight, and comprising 5 to 85% by weight of toluene diisocyanate, 5 to 85% by weight of a polyisocyanate of the diphe... | 06/30/2009 |
| 7547801 | Process for the continuous preparation of isocyanates Isocyanates are produced by reacting an organic amine with phosgene in process which includes at least three stages. The first stage is carried out in a dynamic mixer. The second stage is carried out in at least one reactor. The third stage is carried out in at leas... | 06/16/2009 |
| 7541487 | Process for the preparation of isocyanates in the gas phase An isocyanate is produced by reacting a primary amine with phosgene in the gas phase above the boiling point of the amine over an average contact time of 0.05 to 15 seconds under adiabatic conditions. ... | 06/02/2009 |
| 7540932 | Apparatus and process for the production of sandwich composite elements An apparatus for the production of sandwich composite elements which includes at least two feed apparatus for facings, to which an application apparatus for an adhesion promoter, an application apparatus for a core layer, a conveying apparatus and a cutting apparatu... | 06/02/2009 |
| 7521576 | Process for the distillation of a mixture of isomeric diisocyanatodiphenyl-methanes 2,4′-MDI which contains very little 2,2′-MDI is prepared by distilling an isomeric starting mixture of diisocyanatodiphenylmethanes which includes 2,2′-diisocyanato-diphenylmethane, 2,4′-diisocyanatodiphenylmethane and 4,4′-diisocyanatodiphenyl-methane in ... | 04/21/2009 |
| 7511111 | Polyurethane elastomers having improved physical properties and a process for the production thereof A polyol composition having a number average molecular weight of from about 1,000 to about3,000 Daltons is made up of (1) at least 55% by weight of a low monol polyoxypropylene polyol having a number average molecular weight of from about 1,000 to 12,000 Da and a de... | 03/31/2009 |
| 7504533 | Process for the production of isocyanates Isocyanates are produced by a) reacting at least one amine with phosgene, optionally in the presence of a solvent to produce the corresponding isocyanate and a stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds a... | 03/17/2009 |
| 7495136 | Process for the production of dinitrotoluene Dinitrotoluene is produced by nitration of toluene with nitrating acid (mixture of nitric acid and sulfuric acid) in which, in a first stage, the toluene is converted to mononitrotoluene (MNT) and then the mononitrotoluene is converted in a second stage to dinitroto... | 02/24/2009 |
| 7495124 | Process for the production of very pure 2,4′-methylenediphenyl diisocyanate The present invention relates to a process for the production of MDI fractions containing 2,4′-MDI, and in which the 2,2′-MDI component from the MDA production is largely removed from the isomer mixture. Highly reactive monomeric MDI products can be produced in ... | 02/24/2009 |
| 7488850 | Process for removing compounds containing phenolic hydroxy groups from aromatic amines Compounds containing phenolic hydroxy groups are removed from a gas stream which contains at least one aromatic amine generated during the gas-phase hydrogenation reaction of the corresponding nitroaromatic compounds with hydrogen, by adsorption on a basic solid. | 02/10/2009 |
| 7465778 | Silante terminated polyurethane A curable, alkoxysilane-functional polyether urethane composition formed by combining a) a first silane terminated polyurethane prepared by reacting i) a mono-functional compounds with ii) an isocyanate component containing two isocyanate groups, the reaction produc... | 12/16/2008 |
| 7456569 | Light-emitting, transparent film system based on polymers A light-emitting, transparent, flexible film system based on polymers is produced by including a thermoplastic polyurethane film having an electroluminescent pigment incorporated therein in the flexible film system. These systems are useful as a luminescent system. | 11/25/2008 |
