| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 528480000 | TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT | 44 |
| 528481000 | Treating at O Deg C (32 Deg F) or below, or at 200 Deg C (392 Deg F) or above | 3 |
| 20080262196 | APPARATUS AND METHOD OF SEPARATING A POLYMER FROM A SOLVENT - The present invention relates to various embodiments of a system and method for separating polymer from a solvent. In one embodiment a system for separating polymer from a solvent comprises an extrusion apparatus includes a hollow member having a first end portion, a second end portion, and a feed port between the first end portion and the second end portion. The extrusion apparatus includes a back flash vent port disposed upstream of the feed port and a forward flash vent port disposed downstream of the feed port. The extrusion apparatus further includes a vent insert located at the forward flash vent port, a screw disposed inside the hollow member, and an internal superheating section disposed between the feed port and the downstream vent opening of the hollow member such that the length of the internal superheating section is greater than about four times the diameter, 4D, of the hollow member. | 10-23-2008 |
| 20100204440 | METHOD FOR THE PREPARATION OF FLUOROPOLYMER POWDERED MATERIALS - A method for the preparation of a modified fluoropolymer powdered material is disclosed. A suspension of solid fluoropolymer particles together with PTFE particles in an aqueous carrier, is frozen and the frozen carrier is then removed by sublimation at sub-atmospheric pressure to produce a dry powder of modified fluoropolymer particles. | 08-12-2010 |
| 20100305301 | Method And Apparatus For Elastomer Finishing - In the production of elastomers the product obtained from the polymerization process is often in the form of a slurry. Described herein are an apparatus and a process for “finishing” the elastomer, i.e., dewatering and drying the elastomer. The process comprises the steps of obtaining a slurry comprising water and elastomer; passing the slurry through a first dewatering device to produce a wet elastomer crumb, wherein the first dewatering device comprises two dewatering extruders in parallel; passing the wet elastomer crumb through a second dewatering device; and then passing the wet elastomer crumb through a drying device to produce a dried elastomer crumb. | 12-02-2010 |
| 528482000 | Contacting with ion exchange material or solid sorbent | 2 |
| 20080200643 | METHOD FOR REDUCING THE CONTENT OF FLUORESCENT PARTICLES IN POLYCARBONATE - A method for reducing the content of fluorescent particles in polycarbonate is disclosed. The method entails bringing into contact polycarbonate, in the melt or in solution, with aluminosilicate at a temperature and for a time calculated to obtain polycarbonate having fluorescent particles content of 0 to 5 counts/g of polycarbonate. In a preferred embodiment the polycarbonate is passed through a column packed with zeolite. | 08-21-2008 |
| 20100286361 | PURIFICATION METHOD OF HIGH-MOLECULAR-WEIGHT POLYOXYALKYLENE DERIVATIVE - A purification method in which, from a specific polyoxyalkylene derivative having a molecular weight of 8,800 to 100,000, an impurity differing in the number of hydroxyl groups is separated, the method including steps (A), (B), (C), and (D). Step (A): a step in which an aprotic organic solvent is used in an amount at least 5 times by weight the amount of the polyoxyalkylene derivative to dissolve the polyoxyalkylene derivative therein and give a solution; step (B): a step in which an adsorbent comprising an oxide containing at least one of aluminum and silicon is added to the solution in an amount 0.5 to 5 times by weight the amount of the polyoxyalkylene derivative to thereby yield a slurry; step (C): a step in which the slurry is stirred at 25° C. or higher; step (D): a step in which the polyoxyalkylene derivative is recovered from the slurry. | 11-11-2010 |
| 528483000 | Contacting with exteriorly produced specified gaseous agent other than drying, blanket, or carrier gas | 3 |
| 20080227951 | Process for preparing high molecular weight polyesters - A process for producing higher molecular weight polyester includes heating a polyester to form a melt, and applying and maintaining a vacuum of between about 5 mm and about 85 mm of mercury to the melt while passing bubbles of gas through the melt until molecular weight has increased. The process may involve esterification of a diacid component and a diol component at elevated temperature. Typically, an excess of diol was employed. After the acid functional groups have essentially reacted, a vacuum of about 5 mm of mercury or less was applied and excess diol stripped off during transesterification, thereby increasing molecular weight. | 09-18-2008 |
| 20090221788 | Apparatus and Method for Degassing Polymer Powder - The present invention relates to an apparatus for degassing polymer powder comprising a chamber having a first end and a second end opposite to each other, said chamber being equipped with at least one powder inlet and at least one gas outlet at the first end and with at least one powder outlet and at least one gas inlet at the second end, and a valve provided with a powder entry and a powder exit and arranged at the powder outlet of said chamber. The apparatus is characterised in that said chamber is equipped with a gas line joining a gas exit of the valve to the inside of the chamber at a position that is at a distance h | 09-03-2009 |
| 20100004427 | METHOD FOR THE REMOVAL OF ISOBUTENE OLIGOMERS FROM AN ISOBUTENE POLYMER - A process is described for removing isobutene oligomers from an isobutene polymer by stripping the isobutene polymer with vapors of a saturated hydrocarbon having at least 8 carbon atoms and at least partly driving out the isobutene oligomers. Troublesome isobutene oligomers are substantially removed without impairing the reactivity of the isobutene polymer (expressed as the content of the methylidene double bonds). | 01-07-2010 |
| 528484000 | Preventing or removing reactor or processing equipment buildup | 1 |
| 20090118466 | Polymer recovery method - This invention relates to a process comprising contacting an polymerization reactor effluent with a fluorinated hydrocarbon and thereafter recovering olefin polymer, where the fluorinated hydrocarbon is present at 5 volume % to 99 volume % based upon the volume of the effluent and the fluorinated hydrocarbon, and where the polymerization is a continuous polymerization of at least 75 mole % of hydrocarbon monomers, based upon the total moles of monomer present in the reactor. | 05-07-2009 |
| 528485000 | Contacting with aluminum or heavy metal material | 1 |
| 20090062508 | COPPER REMOVAL FROM ATRP PRODUCTS BY MEANS OF ADDITION OF SULFUR COMPOUNDS - The present invention relates to a precipitation process for removing transition metals from polymer solutions. Specifically, it comprises the removal of transition metal complexes which usually comprise copper from polymer solutions after a completed atom transfer radical polymerization. | 03-05-2009 |
| 528486000 | Contacting with carboxylic acid, salt, or anhydride thereof | 4 |
| 20100184943 | PROCESS FOR REMOVING CATIONS FROM POLYARENEAZOLE FIBER - The present invention relates to processes for removing cations from a polyareneazole fiber. | 07-22-2010 |
| 20100184944 | PROCESS FOR REMOVING PHOSPHOROUS FROM A FIBER OR YARN - The present invention relates to processes for removing phosphorus from a fiber or yarn. | 07-22-2010 |
| 20110021742 | METHOD FOR PURIFYING POLYMER AND METHOD FOR PRODUCING POLYMER USING THE SAME - The present invention provides a method for purifying a polymer, by which a reduction in molecular weight of the polymer can be suppressed, and a residual catalyst in the polymer can be reduced effectively. The polymer containing the residual catalyst is brought into contact with an organic solvent containing an organic acid that has a pKa in the range of 2 to 3.9. Thus, the catalyst remaining in the polymer can be reduced, and the polymer can be purified. The organic acid can be, for example, lactic acid. | 01-27-2011 |
| 20110245457 | SYSTEM AND METHOD FOR RECYCLING RESIN PARTICLES - A system and method for recycling resin particles. The system and method includes exposing resin particles to a solvent in a solvent wash tank. Within the tank, the solvent contacts the resin particles and substantially removes the contaminants. After the solvent wash, the resin particles are removed from the solvent and placed into a heated chamber of a dryer. The heated chamber facilitates the evaporation of residual solvent remaining on the resin particles, without the use of liquid or supercritical carbon dioxide, by facilitating the movement of the resin particles through the heated chamber while maintaining a heated environment within the heated chamber. In various embodiments, an alkyl lactate solvent is used in the wash tank and a vacuum may also be applied to the heated chamber, further facilitating the evaporation of the solvent off the resin particles. The system and method has been found to remove volatile polar, non-volatile polar, volatile non-polar, non-volatile non-polar substances, such as but not limited to: Benzophenone, 1-Phenyldecane, Toluene and Diethyl-Ketone, to levels that meet current FDA guidelines, including at or below 0.220 parts per million and 0.5 parts per billion after migration testing. | 10-06-2011 |
| 528487000 | Contacting with sulfur or phosphorus-containing material | 1 |
| 20100029900 | METHOD FOR REMOVING CATALYST RESIDUES FROM POLYMER SOLUTION AND POLYMERS PURIFIED BY THE METHOD - Disclosed is a method for removing a metallic compound catalyst residue from a polymer solution which is prepared in the presence of a catalyst containing metal of Group 10 using a thiourea compound, a polymer from which the metallic compound catalyst residue is removed using the method, and a film produced using the method. | 02-04-2010 |
| 528490000 | Contacting with specified element or with specified inorganic compound other than water, elemental nitrogen, air and the inert gases (Group VIII A) | 1 |
| 20090131633 | METHOD OF SURFACE CROSS-LINKING SUPERABSORBENT POLYMER PARTICLES USING ULTRAVIOLET RADIATION AND BRONSTED ACIDS - The present invention relates to a method of surface cross-linking superabsorbent polymer particles using UV irradiation. The superabsorbent polymer particles for use in the method of the present invention have a relatively high degree of neutralization. Bronsted acids are selectively applied onto the surface of the superabsorbent polymer particles to selectively facilitate a relatively high number of protonated carboxyl groups at the surface of the superabsorbent polymer particles while the relatively high degree of neutralization in the core of the superabsorbent polymer particles remains substantially unaffected. | 05-21-2009 |
| 528491000 | Contacting with organic material | 3 |
| 528492000 | Nitrogen containing | 1 |
| 20090036646 | DRYING PROCESS FOR POLYMER CROSSLINKED BI-CONTINUOUS MACRO-MESOPOROUS AEROGELS - A method of drying an aerogel is disclosed. The method includes washing the aerogel in acetone, washing the aerogel in pentane, and heating the aerogel in the presence of pentane. The aerogel is removed from the pentane and the heating continues. | 02-05-2009 |
| 528493000 | Aldehyde or ketone | 2 |
| 20110003968 | Process for the purification of polyol PFPE derivative - A process for the purification of a tetraol PFPE derivative [tetraol (T)] of formula (I): HO—CH | 01-06-2011 |
| 20110021743 | EXTRACTION AND FRACTIONATION OF BIOPOLYMERS AND RESINS FROM PLANT MATERIALS - A method for the extraction, separation, fractionation and purification of biopolymers from plant materials using supercritical and/or subcritical solvent extractions is disclosed. Specifically, the process can be used for the separation of resins and rubber from guayule shrub ( | 01-27-2011 |
| 528499000 | Contacting with water | 3 |
| 20100204441 | MEANS FOR AND METHODS OF PROCESSING SUPERFINE DRY POLYMER - Superfine dry polymer particles (about 70-400 mesh, mean average) are hydrated while in a highly energized turbulence. The dry particles are metered at a rate which separates the particles at the time when they first strike a solvent. The turbulence of the mixed particles and a solvent (preferably water) further separates and wets the particles. | 08-12-2010 |
| 20110118436 | Method For Degrading Water-Soluble Polymeric Films - A method of degrading a water-soluble, synthetic polymeric film being at least partially covered with a paint material. The method includes placing the film in an extractor apparatus and separating the paint material from the film. The paint material is collected from a water-based solution with a filtration media. The film is degraded in the extractor apparatus. | 05-19-2011 |
| 528500000 | Steam stripping or steam distilling | 1 |
| 20100130719 | PROCESS FOR DEVOLATILIZATION OF POLYMER OF AN AROMATIC ALKYLENE - The present invention relates to a process for devolatilization of a polymer of an aromatic alkylene, such as styrene, and in particular, to an improved process using water as a stripping agent (i) in which the total amount of water to be disposed of can be reduced, (ii) which allows at least a portion of the water to be recycled as stripping agent, reducing make-up requirements for the stripping agent, and (iii) which allows at least a portion of the aromatic alkylene monomer in the water to be recycled to the polymerisation process (via the devolatilization steps) rather than disposed of. | 05-27-2010 |
| 528501000 | With distilling or pressured reduction step to remove material, e.g., flashing, autorefrigeration, etc. | 3 |
| 20080227952 | Method and apparatus for separation of polymer from a slurry - Provided for separating polymer from a slurry comprising polymer and unreacted carrier fluid is (a) a method comprising supplying slurry to a first heating means to increase the temperature of the slurry, using a first separator means to extract a portion of unreacted carrier fluid from the slurry to obtain a slurry enriched in polymer, supplying the enriched slurry to a second heating means to increase the temperature of the enriched slurry, and using a second separator means to extract an additional portion of unreacted carrier fluid from the enriched slurry to obtain a further enriched slurry, and (b) an apparatus comprising a first heating means, a first separator means, a second heating means and a second separator means. | 09-18-2008 |
| 20080255338 | Method of batch falling strand devolatilizer - A design method of batch falling strand devolatilizers is disclosed. The method includes following steps. Firstly, construct a database that contains data of batch falling strand devolatilizer vs. devolatilization of at least one kind of polymer. Then data in the database is substituted into a mass balance difference equation to get a backmixing parameter. When the backmixing parameter is zero or is approaching zero, a liquid diffusion stage efficiency equation having a film equation or a pool equation is integrated with the mass balance difference equation to get a devolatilization process efficiency equation. By means of a theoretical value of the backmixing parameter, a theoretical value of the process efficiency from calculation of the devolatilization process efficiency equation approaches the value of the process efficiency. Then the theoretical value of the backmixing parameter is substituted into the devolatilization process efficiency equation for performing volume design of the batch falling strand devolatilizer. | 10-16-2008 |
| 20120264911 | System and Method for Processing Reactor Polymerization Effluent - A method of treating a polymerization reactor effluent stream comprising recovering the reactor effluent stream from the polymerization reactor, flashing the reactor effluent stream to form a flash gas stream, separating the flash gas stream into a first top stream, a first bottom stream, and a side stream, wherein the side stream substantially comprises hexane, separating the first top stream into a second top stream and a second bottom stream, wherein the second bottom stream substantially comprises isobutene, and separating the second top stream into a third top stream and a third bottom stream; wherein the third top stream substantially comprises ethylene, and wherein the third bottom stream is substantially free of olefins. | 10-18-2012 |
| 528502000 | Physical treatment | 12 |
| 20090023891 | TREATMENT METHOD FOR IMPARTING SELF-HEALING AND SHAPE MEMORY PROPERTIES TO CERTAIN CBDO COPOLYMERS - According to the invention, an amorphous CBDO polymer (as described in U.S. Pat. No. 5,705,575, issued Jan. 6, 1998, which U.S. patent is incorporated herein by reference in its entirety) is imparted self healing and shape memory properties by heat treatment. | 01-22-2009 |
| 20090030177 | SYNTHESIS OF PHOTORESIST POLYMER - A polymer for use in photoresist compositions is synthesized by effecting polymerization reaction to form a polymerization product mixture and subjecting the mixture to molecular weight fractionation by a liquid phase separation technique using a good solvent and a poor solvent. The fractionation step is iterated at least twice, and one iteration of fractionation includes adding a good solvent which is different from the good solvent added in the other iteration of fractionation. | 01-29-2009 |
| 20100029901 | Process for Producing Granular Carboxylated-Polymer Particle and Granular Carboxylated-Polymer Particle - An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. | 02-04-2010 |
| 20100234561 | PROCESS FOR PRODUCING FINE PARTICLES - A process for producing fine particles is provided including the steps of (1) preparing a solution having a viscosity of 20 mPa·s or less at 25° C. by using a polymer and a first solvent, (2) mixing the solution with a second solvent to prepare an emulsion and (3) removing the first solvent from the emulsion to obtain fine particles containing the polymer. | 09-16-2010 |
| 20110028684 | POLYMER STREAM TRANSFER - A process for heating a polymer-containing stream being transferred from a polymerization reactor to a separation zone or device, comprising passing the stream through at least two heaters operating in parallel, each heater comprising at least one transfer line for the stream and means for heating the transfer line, wherein the temperature of the polymer-containing stream at the outlet of all heaters is maintained above the dew point of the stream, and no heater has a volumetric flowrate of polymer-containing stream more than three times that of any other heater. | 02-03-2011 |
| 20110152499 | CHROMATOGRAPHY OF POLYOLEFIN POLYMERS - A method for multi-dimensional chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a first liquid chromatography stationary phase or a field flow fractionation device and subsequently flowing the solution through a second liquid chromatography stationary phase, the second liquid chromatography stationary phase comprising graphitic carbon, the polyolefin polymer emerging from the liquid chromatography stationary phase with a retention factor greater than zero. | 06-23-2011 |
| 20110172389 | Separation of Enzymatically Synthesized Polyepicatechin via High Performance Liquid Chromatography - Disclosed is a process for the separation of one or more fractions from a resulting reaction mixture of an enzymatically catalyzed polymerization of flavonoid using HPLC with a varying concentration of organic solvent in the mobile phase. The isolated fractions can be used in numerous applications including as an antioxidant. | 07-14-2011 |
| 20090082546 | CROSSLINKED POLYMERIC MATERIAL WITH ENHANCED STRENGTH AND PROCESS FOR MANUFACTURING - A radiation crosslinked (50 kGy), pressure-treated UHMWPE material has been developed by applying compressive force on a crosslinked polymer in a direction orthogonal to an axial direction. The deformed material is then cooled while held in a deformed state. The resulting material is anisotropic, with enhanced strength oriented along the axial direction. The directionally engineered material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted highly crosslinked UHMWPEs. | 03-26-2009 |
| 20100145005 | METHOD AND APPARATUS FOR DENSIFYING POLYPROPYLENE - A method of densifying polypropylene includes steps of reducing expanded polypropylene into relatively small particles and heating and compressing the particles to form densified polypropylene. The expanded polypropylene can be reduced to intermediate pieces prior to reduction to the small particles. The combination of the particle size, heat, and compression effects lasting densification of the polypropylene. An apparatus for densifying polypropylene includes a grinder to generate particles of expanded polypropylene and a densifier that heats and compresses the particles into densified polypropylene. | 06-10-2010 |
| 20100305302 | METHOD OF DRYING A MATERIAL HAVING A COHESIVE PHASE - A method for drying a material such as a polymer hydrogel which passes through a cohesive phase as it dries is disclosed. The method comprises agitating a composition while removing liquid until the solids content of the composition reaches a level at which the composition enters a cohesive phase, halting agitation, removing liquid from the composition in the absence of agitation, and resuming agitation. Practice of the present invention can eliminate the problems associated with adhesion of a material to itself and to process equipment during the cohesive phase. | 12-02-2010 |
| 20110263814 | MEMBRANE SEPARATION PROCESS FOR REMOVING RESIDUALS FROM POLYAMINE-EPIHALOHYDRIN RESINS - This invention relates to a process for preparing polyamine-epihalohydrin resins having reduced levels of residuals. The process comprises (a) charging a membrane separation apparatus with an aqueous composition comprising at least one polyamine-epihalohydrin resin, and (b) separating the aqueous composition into a permeate and a retentate by passing the aqueous composition through the membrane of the membrane separation apparatus. The retentate comprises at least one polyamine-epihalohydrin resin having lower levels of residuals on an equal active component basis than the aqueous composition of (a). The permeate comprises residuals removed from the aqueous composition of (a) and less than 5% by weight of the active component of said at least one polyamine-epihalohydrin resin. The polyamine-epihalohydrin resins having reduced levels of residuals can be used to make wet strength agents, dry strength agents, creping adhesives for paper products, curing agents for wood product adhesives, and other products. | 10-27-2011 |
| 20090326190 | HEAT SETTING OPTICAL FILMS - A method of making an optical film includes providing a film, substantially uniaxially orienting the film, and heat setting the oriented film. The film includes a polymeric material capable of developing birefringence. | 12-31-2009 |
| 528502000 | Filtration | 1 |
| 20090023891 | TREATMENT METHOD FOR IMPARTING SELF-HEALING AND SHAPE MEMORY PROPERTIES TO CERTAIN CBDO COPOLYMERS - According to the invention, an amorphous CBDO polymer (as described in U.S. Pat. No. 5,705,575, issued Jan. 6, 1998, which U.S. patent is incorporated herein by reference in its entirety) is imparted self healing and shape memory properties by heat treatment. | 01-22-2009 |
| 20090030177 | SYNTHESIS OF PHOTORESIST POLYMER - A polymer for use in photoresist compositions is synthesized by effecting polymerization reaction to form a polymerization product mixture and subjecting the mixture to molecular weight fractionation by a liquid phase separation technique using a good solvent and a poor solvent. The fractionation step is iterated at least twice, and one iteration of fractionation includes adding a good solvent which is different from the good solvent added in the other iteration of fractionation. | 01-29-2009 |
| 20100029901 | Process for Producing Granular Carboxylated-Polymer Particle and Granular Carboxylated-Polymer Particle - An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. | 02-04-2010 |
| 20100234561 | PROCESS FOR PRODUCING FINE PARTICLES - A process for producing fine particles is provided including the steps of (1) preparing a solution having a viscosity of 20 mPa·s or less at 25° C. by using a polymer and a first solvent, (2) mixing the solution with a second solvent to prepare an emulsion and (3) removing the first solvent from the emulsion to obtain fine particles containing the polymer. | 09-16-2010 |
| 20110028684 | POLYMER STREAM TRANSFER - A process for heating a polymer-containing stream being transferred from a polymerization reactor to a separation zone or device, comprising passing the stream through at least two heaters operating in parallel, each heater comprising at least one transfer line for the stream and means for heating the transfer line, wherein the temperature of the polymer-containing stream at the outlet of all heaters is maintained above the dew point of the stream, and no heater has a volumetric flowrate of polymer-containing stream more than three times that of any other heater. | 02-03-2011 |
| 20110152499 | CHROMATOGRAPHY OF POLYOLEFIN POLYMERS - A method for multi-dimensional chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a first liquid chromatography stationary phase or a field flow fractionation device and subsequently flowing the solution through a second liquid chromatography stationary phase, the second liquid chromatography stationary phase comprising graphitic carbon, the polyolefin polymer emerging from the liquid chromatography stationary phase with a retention factor greater than zero. | 06-23-2011 |
| 20110172389 | Separation of Enzymatically Synthesized Polyepicatechin via High Performance Liquid Chromatography - Disclosed is a process for the separation of one or more fractions from a resulting reaction mixture of an enzymatically catalyzed polymerization of flavonoid using HPLC with a varying concentration of organic solvent in the mobile phase. The isolated fractions can be used in numerous applications including as an antioxidant. | 07-14-2011 |
| 20090082546 | CROSSLINKED POLYMERIC MATERIAL WITH ENHANCED STRENGTH AND PROCESS FOR MANUFACTURING - A radiation crosslinked (50 kGy), pressure-treated UHMWPE material has been developed by applying compressive force on a crosslinked polymer in a direction orthogonal to an axial direction. The deformed material is then cooled while held in a deformed state. The resulting material is anisotropic, with enhanced strength oriented along the axial direction. The directionally engineered material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted highly crosslinked UHMWPEs. | 03-26-2009 |
| 20100145005 | METHOD AND APPARATUS FOR DENSIFYING POLYPROPYLENE - A method of densifying polypropylene includes steps of reducing expanded polypropylene into relatively small particles and heating and compressing the particles to form densified polypropylene. The expanded polypropylene can be reduced to intermediate pieces prior to reduction to the small particles. The combination of the particle size, heat, and compression effects lasting densification of the polypropylene. An apparatus for densifying polypropylene includes a grinder to generate particles of expanded polypropylene and a densifier that heats and compresses the particles into densified polypropylene. | 06-10-2010 |
| 20100305302 | METHOD OF DRYING A MATERIAL HAVING A COHESIVE PHASE - A method for drying a material such as a polymer hydrogel which passes through a cohesive phase as it dries is disclosed. The method comprises agitating a composition while removing liquid until the solids content of the composition reaches a level at which the composition enters a cohesive phase, halting agitation, removing liquid from the composition in the absence of agitation, and resuming agitation. Practice of the present invention can eliminate the problems associated with adhesion of a material to itself and to process equipment during the cohesive phase. | 12-02-2010 |
| 20110263814 | MEMBRANE SEPARATION PROCESS FOR REMOVING RESIDUALS FROM POLYAMINE-EPIHALOHYDRIN RESINS - This invention relates to a process for preparing polyamine-epihalohydrin resins having reduced levels of residuals. The process comprises (a) charging a membrane separation apparatus with an aqueous composition comprising at least one polyamine-epihalohydrin resin, and (b) separating the aqueous composition into a permeate and a retentate by passing the aqueous composition through the membrane of the membrane separation apparatus. The retentate comprises at least one polyamine-epihalohydrin resin having lower levels of residuals on an equal active component basis than the aqueous composition of (a). The permeate comprises residuals removed from the aqueous composition of (a) and less than 5% by weight of the active component of said at least one polyamine-epihalohydrin resin. The polyamine-epihalohydrin resins having reduced levels of residuals can be used to make wet strength agents, dry strength agents, creping adhesives for paper products, curing agents for wood product adhesives, and other products. | 10-27-2011 |
| 20090326190 | HEAT SETTING OPTICAL FILMS - A method of making an optical film includes providing a film, substantially uniaxially orienting the film, and heat setting the oriented film. The film includes a polymeric material capable of developing birefringence. | 12-31-2009 |
| 528502000 | Stretching to alter polymer properties by elongation | 1 |
| 20090023891 | TREATMENT METHOD FOR IMPARTING SELF-HEALING AND SHAPE MEMORY PROPERTIES TO CERTAIN CBDO COPOLYMERS - According to the invention, an amorphous CBDO polymer (as described in U.S. Pat. No. 5,705,575, issued Jan. 6, 1998, which U.S. patent is incorporated herein by reference in its entirety) is imparted self healing and shape memory properties by heat treatment. | 01-22-2009 |
| 20090030177 | SYNTHESIS OF PHOTORESIST POLYMER - A polymer for use in photoresist compositions is synthesized by effecting polymerization reaction to form a polymerization product mixture and subjecting the mixture to molecular weight fractionation by a liquid phase separation technique using a good solvent and a poor solvent. The fractionation step is iterated at least twice, and one iteration of fractionation includes adding a good solvent which is different from the good solvent added in the other iteration of fractionation. | 01-29-2009 |
| 20100029901 | Process for Producing Granular Carboxylated-Polymer Particle and Granular Carboxylated-Polymer Particle - An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. | 02-04-2010 |
| 20100234561 | PROCESS FOR PRODUCING FINE PARTICLES - A process for producing fine particles is provided including the steps of (1) preparing a solution having a viscosity of 20 mPa·s or less at 25° C. by using a polymer and a first solvent, (2) mixing the solution with a second solvent to prepare an emulsion and (3) removing the first solvent from the emulsion to obtain fine particles containing the polymer. | 09-16-2010 |
| 20110028684 | POLYMER STREAM TRANSFER - A process for heating a polymer-containing stream being transferred from a polymerization reactor to a separation zone or device, comprising passing the stream through at least two heaters operating in parallel, each heater comprising at least one transfer line for the stream and means for heating the transfer line, wherein the temperature of the polymer-containing stream at the outlet of all heaters is maintained above the dew point of the stream, and no heater has a volumetric flowrate of polymer-containing stream more than three times that of any other heater. | 02-03-2011 |
| 20110152499 | CHROMATOGRAPHY OF POLYOLEFIN POLYMERS - A method for multi-dimensional chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a first liquid chromatography stationary phase or a field flow fractionation device and subsequently flowing the solution through a second liquid chromatography stationary phase, the second liquid chromatography stationary phase comprising graphitic carbon, the polyolefin polymer emerging from the liquid chromatography stationary phase with a retention factor greater than zero. | 06-23-2011 |
| 20110172389 | Separation of Enzymatically Synthesized Polyepicatechin via High Performance Liquid Chromatography - Disclosed is a process for the separation of one or more fractions from a resulting reaction mixture of an enzymatically catalyzed polymerization of flavonoid using HPLC with a varying concentration of organic solvent in the mobile phase. The isolated fractions can be used in numerous applications including as an antioxidant. | 07-14-2011 |
| 20090082546 | CROSSLINKED POLYMERIC MATERIAL WITH ENHANCED STRENGTH AND PROCESS FOR MANUFACTURING - A radiation crosslinked (50 kGy), pressure-treated UHMWPE material has been developed by applying compressive force on a crosslinked polymer in a direction orthogonal to an axial direction. The deformed material is then cooled while held in a deformed state. The resulting material is anisotropic, with enhanced strength oriented along the axial direction. The directionally engineered material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted highly crosslinked UHMWPEs. | 03-26-2009 |
| 20100145005 | METHOD AND APPARATUS FOR DENSIFYING POLYPROPYLENE - A method of densifying polypropylene includes steps of reducing expanded polypropylene into relatively small particles and heating and compressing the particles to form densified polypropylene. The expanded polypropylene can be reduced to intermediate pieces prior to reduction to the small particles. The combination of the particle size, heat, and compression effects lasting densification of the polypropylene. An apparatus for densifying polypropylene includes a grinder to generate particles of expanded polypropylene and a densifier that heats and compresses the particles into densified polypropylene. | 06-10-2010 |
| 20100305302 | METHOD OF DRYING A MATERIAL HAVING A COHESIVE PHASE - A method for drying a material such as a polymer hydrogel which passes through a cohesive phase as it dries is disclosed. The method comprises agitating a composition while removing liquid until the solids content of the composition reaches a level at which the composition enters a cohesive phase, halting agitation, removing liquid from the composition in the absence of agitation, and resuming agitation. Practice of the present invention can eliminate the problems associated with adhesion of a material to itself and to process equipment during the cohesive phase. | 12-02-2010 |
| 20110263814 | MEMBRANE SEPARATION PROCESS FOR REMOVING RESIDUALS FROM POLYAMINE-EPIHALOHYDRIN RESINS - This invention relates to a process for preparing polyamine-epihalohydrin resins having reduced levels of residuals. The process comprises (a) charging a membrane separation apparatus with an aqueous composition comprising at least one polyamine-epihalohydrin resin, and (b) separating the aqueous composition into a permeate and a retentate by passing the aqueous composition through the membrane of the membrane separation apparatus. The retentate comprises at least one polyamine-epihalohydrin resin having lower levels of residuals on an equal active component basis than the aqueous composition of (a). The permeate comprises residuals removed from the aqueous composition of (a) and less than 5% by weight of the active component of said at least one polyamine-epihalohydrin resin. The polyamine-epihalohydrin resins having reduced levels of residuals can be used to make wet strength agents, dry strength agents, creping adhesives for paper products, curing agents for wood product adhesives, and other products. | 10-27-2011 |
| 20090326190 | HEAT SETTING OPTICAL FILMS - A method of making an optical film includes providing a film, substantially uniaxially orienting the film, and heat setting the oriented film. The film includes a polymeric material capable of developing birefringence. | 12-31-2009 |
| 528502000 | Compression or pressure treatment | 3 |
| 20090023891 | TREATMENT METHOD FOR IMPARTING SELF-HEALING AND SHAPE MEMORY PROPERTIES TO CERTAIN CBDO COPOLYMERS - According to the invention, an amorphous CBDO polymer (as described in U.S. Pat. No. 5,705,575, issued Jan. 6, 1998, which U.S. patent is incorporated herein by reference in its entirety) is imparted self healing and shape memory properties by heat treatment. | 01-22-2009 |
| 20090030177 | SYNTHESIS OF PHOTORESIST POLYMER - A polymer for use in photoresist compositions is synthesized by effecting polymerization reaction to form a polymerization product mixture and subjecting the mixture to molecular weight fractionation by a liquid phase separation technique using a good solvent and a poor solvent. The fractionation step is iterated at least twice, and one iteration of fractionation includes adding a good solvent which is different from the good solvent added in the other iteration of fractionation. | 01-29-2009 |
| 20100029901 | Process for Producing Granular Carboxylated-Polymer Particle and Granular Carboxylated-Polymer Particle - An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. | 02-04-2010 |
| 20100234561 | PROCESS FOR PRODUCING FINE PARTICLES - A process for producing fine particles is provided including the steps of (1) preparing a solution having a viscosity of 20 mPa·s or less at 25° C. by using a polymer and a first solvent, (2) mixing the solution with a second solvent to prepare an emulsion and (3) removing the first solvent from the emulsion to obtain fine particles containing the polymer. | 09-16-2010 |
| 20110028684 | POLYMER STREAM TRANSFER - A process for heating a polymer-containing stream being transferred from a polymerization reactor to a separation zone or device, comprising passing the stream through at least two heaters operating in parallel, each heater comprising at least one transfer line for the stream and means for heating the transfer line, wherein the temperature of the polymer-containing stream at the outlet of all heaters is maintained above the dew point of the stream, and no heater has a volumetric flowrate of polymer-containing stream more than three times that of any other heater. | 02-03-2011 |
| 20110152499 | CHROMATOGRAPHY OF POLYOLEFIN POLYMERS - A method for multi-dimensional chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a first liquid chromatography stationary phase or a field flow fractionation device and subsequently flowing the solution through a second liquid chromatography stationary phase, the second liquid chromatography stationary phase comprising graphitic carbon, the polyolefin polymer emerging from the liquid chromatography stationary phase with a retention factor greater than zero. | 06-23-2011 |
| 20110172389 | Separation of Enzymatically Synthesized Polyepicatechin via High Performance Liquid Chromatography - Disclosed is a process for the separation of one or more fractions from a resulting reaction mixture of an enzymatically catalyzed polymerization of flavonoid using HPLC with a varying concentration of organic solvent in the mobile phase. The isolated fractions can be used in numerous applications including as an antioxidant. | 07-14-2011 |
| 20090082546 | CROSSLINKED POLYMERIC MATERIAL WITH ENHANCED STRENGTH AND PROCESS FOR MANUFACTURING - A radiation crosslinked (50 kGy), pressure-treated UHMWPE material has been developed by applying compressive force on a crosslinked polymer in a direction orthogonal to an axial direction. The deformed material is then cooled while held in a deformed state. The resulting material is anisotropic, with enhanced strength oriented along the axial direction. The directionally engineered material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted highly crosslinked UHMWPEs. | 03-26-2009 |
| 20100145005 | METHOD AND APPARATUS FOR DENSIFYING POLYPROPYLENE - A method of densifying polypropylene includes steps of reducing expanded polypropylene into relatively small particles and heating and compressing the particles to form densified polypropylene. The expanded polypropylene can be reduced to intermediate pieces prior to reduction to the small particles. The combination of the particle size, heat, and compression effects lasting densification of the polypropylene. An apparatus for densifying polypropylene includes a grinder to generate particles of expanded polypropylene and a densifier that heats and compresses the particles into densified polypropylene. | 06-10-2010 |
| 20100305302 | METHOD OF DRYING A MATERIAL HAVING A COHESIVE PHASE - A method for drying a material such as a polymer hydrogel which passes through a cohesive phase as it dries is disclosed. The method comprises agitating a composition while removing liquid until the solids content of the composition reaches a level at which the composition enters a cohesive phase, halting agitation, removing liquid from the composition in the absence of agitation, and resuming agitation. Practice of the present invention can eliminate the problems associated with adhesion of a material to itself and to process equipment during the cohesive phase. | 12-02-2010 |
| 20110263814 | MEMBRANE SEPARATION PROCESS FOR REMOVING RESIDUALS FROM POLYAMINE-EPIHALOHYDRIN RESINS - This invention relates to a process for preparing polyamine-epihalohydrin resins having reduced levels of residuals. The process comprises (a) charging a membrane separation apparatus with an aqueous composition comprising at least one polyamine-epihalohydrin resin, and (b) separating the aqueous composition into a permeate and a retentate by passing the aqueous composition through the membrane of the membrane separation apparatus. The retentate comprises at least one polyamine-epihalohydrin resin having lower levels of residuals on an equal active component basis than the aqueous composition of (a). The permeate comprises residuals removed from the aqueous composition of (a) and less than 5% by weight of the active component of said at least one polyamine-epihalohydrin resin. The polyamine-epihalohydrin resins having reduced levels of residuals can be used to make wet strength agents, dry strength agents, creping adhesives for paper products, curing agents for wood product adhesives, and other products. | 10-27-2011 |
| 20090326190 | HEAT SETTING OPTICAL FILMS - A method of making an optical film includes providing a film, substantially uniaxially orienting the film, and heat setting the oriented film. The film includes a polymeric material capable of developing birefringence. | 12-31-2009 |
| 528503000 | Temperature maintaining, heating or cooling | 7 |
| 20090088552 | Method of Preparing a Material for an Artificial Seed - A method of preparing a material for use in a manufactured seed is provided. The method includes providing the material having a melting temperature. The method also includes subjecting the material to a heat treatment at a temperature about 10% below the melting temperature for a predetermined period of time. | 04-02-2009 |
| 20090137777 | Polyepoxy compound, method for producing same, thermosetting resin composition containing same, cured product of such composition, and method for removing such cured product - The present invention provides a specific polyepoxy compound having at least two olefin oxide groups and at least one tertiary ester group per molecule, a method for producing the compound, a thermosetting resin composition containing the compound, a cured product of the composition, and a method for removing the cured product. | 05-28-2009 |
| 20090326191 | WATER REPELLENT POWDER DRYING METHOD, PRODUCING METHOD, AND PRODUCING APPARATUS - A semi-finished product obtained as a mixture of PTFE powder and water is put on conveyance trays ( | 12-31-2009 |
| 20100093972 | METHOD OF STABILIZING RESORCINOL RESINS AND GEL COMPOSITIONS MADE THEREFROM - A method of stabilizing a resorcinol-aldehyde resin comprises heating a resorcinol-aldehyde resin in the substantial absence of an acid or base catalyst at a temperature from about 130° C. to about 180° C. for a sufficient amount of time to render the resin stable in an aqueous solution, wherein the resorcinol-aldehyde resin prior to heating is a novolak resin. The stabilized resins have many useful applications. For example, they can be used to make aerogels and xerogels. They also can be used to make dipping solutions to improve the adhesion between rubber and tire cords in a tire, belt, or hose. | 04-15-2010 |
| 20100184945 | PROCESS FOR HYDROLYZING POLYPHOSPHORIC ACID IN A SPUN YARN - The present invention relates to processes for hydrolyzing polyphosphoric acid in a fiber and the removal of hydrolyzed polyphosphoric acid from the fiber. | 07-22-2010 |
| 20100210814 | FUSION-FREE HYDROLYSIS OF POLYPHOSPHORIC ACID IN SPUN MULTIFILAMENT YARNS - The present invention relates to processes for hydrolyzing polyphosphoric acid in spun multifilament yarns. | 08-19-2010 |
| 20110294978 | PROCESS AND A DEVICE FOR THE CONTINUOUS TREATMENT OF MIXED SUBSTANCES - A process for the continuous thermal treatment of mixed substances, especially of solutions, suspensions and emulsions, wherein the continuous treatment of the mixed substances is divided into a main vaporization and a degassing stage, in which instance the main vaporization and the degassing take place in each case takes place in a separate mixer-kneader. | 12-01-2011 |
