| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | MICRON-SIZE POLYMER PARTICLES, PRODUCTION AND USES THEREOF | US12124992 | 2008-05-21 | US20080287641A1 | 2008-11-20 | Ronald Highsmith |
| A plurality of micron-size solid particles is described herein that includes at least one polyamide compound, wherein the particles comprise a diameter in the range of about 1 micron to about 1000 microns, and wherein at least some of the plurality of particles are substantially transparent. In addition, a plurality of micron-size solid particles is described herein that includes at least one polyamide compound, wherein the particles comprise a diameter of less than about 4 microns. Methods of forming a plurality of micron-size solid particles are also described that include a) introducing at least one amide-based compound having a melting point, at least one suspending agent and at least one surfactant into a reaction vessel to form a reaction mixture; b) applying a thermal energy to the reaction mixture, wherein the thermal energy comprises a temperature that is at or above the melting point of the at least one amide-based compound; c) polymerizing the at least one amide-based compound in the reaction mixture; d) cooling the reaction mixture; and e) rinsing the reaction mixture to retrieve the polymer particles. | ||||||
| 102 | PH-REGULATED POLYAMIDE POWDER FOR COSMETIC APPLICATIONS | US12173382 | 2008-07-15 | US20080279904A1 | 2008-11-13 | Thomas SCHIFFER; Holger Renners; Wolfgang Christoph; Franz-Erich Baumann; Joachim Muegge |
| The present invention relates to polyamide powders suitable for cosmetic applications are described which have a pH of 4.0 to 7.0, cosmetic compositions containing the polyamide powders and processes of making the same. | ||||||
| 103 | POLYAMIDE MATRICES AND METHODS FOR THEIR PREPARATION AND USE | US12032388 | 2008-02-15 | US20080277342A1 | 2008-11-13 | Christopher J. Kurth; Isaac K. Iverson; Philip M. Rolchigo; Steven D. Kloos; Leonard T. Hodgins |
| The invention provides novel polymer matrices and methods for preparing polymer matrices, as well as methods for purifying caustic feed streams using membranes that comprise polysulfonamide matrices. | ||||||
| 104 | Aliphatic Polyester-Amide Compositions and a Process for Producing the Same | US11917164 | 2006-06-14 | US20080214743A1 | 2008-09-04 | Rene Broos; Rudolf J. Koopmans |
| The invention is a method for increasing the molecular weight of and optionally providing branching in a polymer which has a first repeat unit, which comprises the residual of a condensation reaction of an aliphatic dicarboxylic acid and either a bisamide diol or a bis diamide diester, and a second repeat unit, which comprises the residual of a condensation reaction of a diol and an aliphatic dicarboxylic acid. The invention is also the branched polymer that can be made by such a method. | ||||||
| 105 | Micron-size polymer particles comprising polyamide compound, production and uses thereof | US10684856 | 2003-10-13 | US07393585B2 | 2008-07-01 | Ronald Highsmith |
| A plurality of micron-size solid particles is described herein that includes at least one polyamide compound, wherein the particles comprise a diameter in the range of about 1 micron to about 1000 microns, and wherein at least some of the plurality of particles are substantially transparent. In addition, a plurality of micron-size solid particles is described herein that includes at least one polyamide compound, wherein the particles comprise a diameter of less than about 4 microns. Methods of forming a plurality of micron-size solid particles are also described that include a) introducing at least one amide-based compound having a melting point, at least one suspending agent and at least one surfactant into a reaction vessel to form a reaction mixture; b) applying a thermal energy to the reaction mixture, wherein the thermal energy comprises a temperature that is at or above the melting point of the at least one amide-based compound; c) polymerizing the at least one amide-based compound in the reaction mixture; d) cooling the reaction mixture; and e) rinsing the reaction mixture to retrieve the polymer particles. | ||||||
| 106 | Controlling the crystallization of polyesters by means of their water content | US10837571 | 2004-05-04 | US07193032B2 | 2007-03-20 | Brent-Allan Culbert; Andreas Christel |
| Methods are disclosed herein to reduce and/or eliminate agglomerations and deformations of pellets comprised of crystallizable thermoplastic polymer material during a crystallization or crystallization of the pellets. As described herein, polymer material is subjected to one or more conditioning steps prior to crystallization, in which a controlled moisture content and/or controlled moisture profile is set in the material, or in which the polymer material was obtained via solidification from a polymer melt in such a way that the polymer material has a defined initial moisture profile before the crystallization step | ||||||
| 107 | Controlling the crystallization of polyesters by means of their water content | US10837571 | 2004-05-04 | US20050004341A1 | 2005-01-06 | Brent-Allan Culbert; Andreas Christel |
| Methods are disclosed herein to reduce and/or eliminate agglomerations and deformations of pellets comprised of crystallizable thermoplastic polymer material during a crystallization or crystallization of the pellets. As described herein, polymer material is subjected to one or more conditioning steps prior to crystallization, in which a controlled moisture content and/or controlled moisture profile is set in the material, or in which the polymer material was obtained via solidification from a polymer melt in such a way that the polymer material has a defined initial moisture profile before the crystallization step | ||||||
| 108 | Increase in the melting point and the enthalpy of melting of polyamides by a water treatment | US10689840 | 2003-10-22 | US20040138344A1 | 2004-07-15 | Jean-Philippe Allen; Philippe Blondel; Patrick Douais |
| The present invention relates to a method for increasing at least one of the following two parameters of a polyamide: (i) its melting point and (ii) its enthalpy of melting nullHm, in which: this polyamide is brought into contact in the solid state with water or with steam at a temperature close to its crystallization temperature Tc for a time long enough to effect this increase; then, the water (or steam) is separated from the polyamide and the polyamide is dried. The polyamide may be a homopolyamide or a copolyamide. It may be a blend of a polyamide and of at least one other polymer, the polyamide forming the matrix and the other polymer or polymers forming the dispersed phase. Advantageously, the polyamide is in divided form, such as powder or granules. The granules thus treated may then be ground in order to make powders. The present invention also relates to a process for manufacturing polyamide objects by the sintering of polyamide powders by melting them using radiation, the powders having been treated according to the abovementioned method or resulting from the grinding of granules treated according to the abovementioned method. As an example of radiation, mention may be made of that provided by a laser beam (the process is then called laser sintering). Mention may also be made of the process in which a mask is placed between the powder layer and the radiation source, the powder particles protected from the radiation by the mask not being sintered. | ||||||
| 109 | Polyamide composition and method for producing the same | US10239982 | 2002-09-26 | US06710159B2 | 2004-03-23 | Heinrich Morhenn; Dieter Göbbels; Cliff Scherer; Frank Weyrich; Konrad Triebeneck; Klemens Kohlgrüber |
| A process for producing a polyamide or copolyamide freed from volatile constituents by removing the volatile constituents, in particular the monomers and dimers, in at least two stages from the polymer melt by using an, in particular, gaseous entrainer is described. The invention also relates to polyamide compositions made of polyamide 6 or a copolyamide with a reduced volatile constituent content, as well as moulding compositions made of the above-mentioned polyamides, and moulded articles and fibers which are produced from these moulding compositions. | ||||||
| 110 | Process for the production of polyamide-6 from epsilon-caprolactam | US09815288 | 2001-03-23 | US06528614B2 | 2003-03-04 | Ernst E. G. Kloosterman; Albert A. A. Van Geenen; Cornelis C. L. Van Der Sluijs; Erik E. R. Peerlkamp; Theo T. K. Schulpen; Ronald R. J. H. Hoenen |
| The invention relates to a process for the production of polyamide-6 by polymerization of &egr;-caprolactam with full re-use of extracted caprolactam and oligomers. The extract is not subjected to a pretreatment for reduction of the cyclic dimer content. By carrying out the polymerization in two steps, the first at an elevated pressure, but lower than the vapor pressure of the reaction mixture supplied, and the second at approximately atmospheric or reduced pressure, the cyclic dimer content of the polymerizate leaving the second polymerization step is kept at a constant level. The process offers a high degree of flexibility in terms of production capacity and composition and proportion of recycled lactam in the lactam feed for the polymerization. | ||||||
| 111 | Process for purifying polymers using ultrasonic extraction | US168985 | 1998-10-09 | US06063894A | 2000-05-16 | Lloyd Myles Phipps; Eric J. Swenson |
| A process for purifying a substantially unoriented polymer containing an impurity by means of ultrasonic leaching or extraction is described. The process involves contacting a substantially unoriented polymer containing an impurity with a cavitatable liquid, subjecting the substantially unoriented polymer containing an impurity in contact with a cavitatable liquid to ultrasonic radiation at a frequency and intensity sufficient to extract the impurity from the substantially unoriented polymer to form a purified substantially unoriented polymer, and then separating the purified substantially unoriented polymer from the cavitatable liquid containing the extracted impurity. A purified substantially unoriented polymer prepared by such a method is also described. | ||||||
| 112 | Selective polyamide recovery from multi-component materials | US840977 | 1997-04-21 | US5889142A | 1999-03-30 | Yousef Mohajer; Thomas Paul Izod; William Bernard Fisher; Scott Martin Hacker |
| A process for selectively separating polyamides from multi-component waste materials including the steps of subjecting the multi-component mix to a specific mixture of caprolactam and water at a preselected temperature range below the degradation temperature of the polymer to be recovered, separating the formed polyamide solution, and recovering the desired polyamide. The process is very desirable for separating multi-component waste materials which contain not only nylon 6, but also nylon 6,6. The recovered polyamide may be used in molding applications and in fiber such as carpet fiber. | ||||||
| 113 | Process for reducing the flammability of aramids | US28671 | 1993-03-09 | US5356666A | 1994-10-18 | Charles E. Jackson, Jr.; Robert V. Kasowski; Kiu-Seung Lee |
| Disclosed herein is a process for reducing the flammability of aramids by contacting a solvent swollen or never dried aramid with an aqueous solution of a tungsten compound, removing the solvent from, and then drying the aramid. The resulting aramids have superior Limiting Oxygen Indices, making them particularly useful where lower flammability is desired, as in firefighters' overcoats. | ||||||
| 114 | Constant compositioin recycle of nylon 6 polymerization wash water | US531976 | 1990-06-01 | US5077381A | 1991-12-31 | Jack A. Dellinger |
| A process for preparing polyamides of substantially constant cyclic dimer concentration from amide monomers includes extracting unreacted amide monomers and oligomers, reducing the oligomer concentration relative to the concentration of total extractants and then returning the extract to the reaction vessel in substantially the same total proportion as extracted. | ||||||
| 115 | Process for separating low molecular weight compounds from polycaproamide melt with superheated steam | US417770 | 1989-10-06 | US4963650A | 1990-10-16 | Elvina Z. Bokareva; Jelena V. Schinkorenko; Viktor V. Terenko; Larisa A. Nosova; Garri I. Faidel; Sijar N. Nurmuchomedov; Anatolij V. Beljakov; Ivan M. Vlasov; Anton Fuerst; Heinz Herrmann; Eckart Pantzer; Bernhard Stoehrer; Eberhard Uhland; Hans Werner |
| A process for separating low molecular weight compounds from a crude polycaproamide melt comprises heat treating the melt in vacuo with superheated steam, in an extruder having a plurality of degassing zones, under precise conditions of temperature, pressure and configuration, such that the occurrence of side reactions and dehydration of the melt are substantially eliminated, the molecular weight of the polymer during the heat treatment in vacuo, during transport and subsequent processing remains substantially unchanged, a residual content of low molecular weight compounds of .ltoreq.1.8% is achieved, and the operating flexibility of the process is increased. | ||||||
| 116 | Continuous process for the hydrolytic production of polycaprolactam by tempering unextracted granular polymer material with moist inert gas | US213776 | 1988-06-30 | US4891420A | 1990-01-02 | Wolfgang K. Martin; James R. Ryffel; Hans H. Schuster; Chih-Peng Wen |
| A process for tempering unextracted polycaprolactam is disclosed which results in polycaprolactam having suitable physical and chemical properties for melt extrusion and spinning, without the need for conventional solvent/water extraction and drying of crude granules. | ||||||
| 117 | Process and composition for lowering the reversible phase change temperature of nylon compositions | US451194 | 1982-12-20 | US4481354A | 1984-11-06 | Benedict S. Curatolo; Gerald P. Coffey |
| A process for modifying certain polyamides by use of a novel combination of an organic sulfone and a lithium halide as a processing aid to yield a modified polymer having thermal stability and a lowered melting point (lower than unmodified polymer). | ||||||
| 118 | Modified nozzles for polymer finishers | US492744 | 1983-05-09 | US4477271A | 1984-10-16 | John M Iwasyk; Robert D. Sauerbrunn |
| An apparatus for separating entrained matter from a flowing fluid carrying the entrained matter includes a passage diverging at an angle of from 3 to about 20 degrees in the direction of flow of the fluid and at least one helical flight having the same twist direction throughout located with the passage and tapered to conform thereto. A straight cylindrical pipe is attached to the outlet end of the passage; the pipe contains a straight baffle interlocking to aboout 90 degrees with the helical flight. Opposed edges of the flight may be spaced from or in contact with the wall of the diverging passage. | ||||||
| 119 | Removal of caprolactam and its oligomers from cooling water containing these compounds | US385270 | 1982-06-04 | US4464266A | 1984-08-07 | Hugo Strehler; Robert Kegel; Guenter Valentin; Werner Hoerauf |
| A process for removing caprolactam and its oligomers from cooling water containing these compounds, wherein gases are introduced into the cooling water and the foam which forms is separated off. | ||||||
| 120 | Devolatilizing molten polymer with a rotary disk processor | US302907 | 1981-09-16 | US4362852A | 1982-12-07 | David Pendlebury; Hugh H. Rowan; Edward J. Buyalos |
| This invention is an improved process to remove volatiles from molten synthetic, preferably fiber forming relatively high viscosity polymers which comprises passing molten polymer through a rotary disk polymer processor at a temperature of between 260.degree. C. and 300.degree. C. at a rate of between about 10 and 75 pounds (4.5 and 34 kg) per hour per square foot (0.093 m.sup.2) of processor filming area, at a rotational rate of between about 5 and 75 rpm for the disks, and a processor having between 1 and 20 stages. | ||||||
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