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| Number | Title | Issue Date |
| 7776995 | Process for production of polyester particles, polyester particles, polyester resin particles, and process for production thereof The present invention relates to a process for producing polyester particles, wherein the process includes: (1) discharging a molten polyester having a melt viscosity of from 0.5 Pa·s to 50 Pa·s from a die hole thereby creating polyester strands; (2) bringing the ... | 08/17/2010 |
| 7763701 | Composite solid phase polymerization catalyst The invention is a method for making condensation polymers, such as polyethylene terephthalate polyester. The method includes introducing to a polycondensation reaction a catalyst system that includes a coordination catalyst and a composite catalyst, which includes ... | 07/27/2010 |
| 7662907 | All-aromatic polyester compound, its preparation, and composition containing the same The present invention relates to all-aromatic polyesters, a method for preparing the same, and a polyester composition containing the same. The present method is carried out in two stages of first carrying out a prepolymerization to obtain a prepolymer having a spec... | 02/16/2010 |
| 7592413 | Manufacture of aromatic polyester Aromatic polyesters are made in a continuous process in an extruder or extruder-like apparatus by reacting at elevated temperatures dicarboxylic acids, aliphatic esters of aromatic diols, and optionally aliphatic esters of aromatic hydroxyacids in an extruder while ... | 09/22/2009 |
| 7351368 | Flocked articles and methods of making same A method of manufacturing a molded article using lamination of a flocked surface onto a backing film is provided. Also provided is a flocked article comprising an antimicrobial agent. ... | 04/01/2008 |
| 7317073 | Method of producing vacuum in the production of polymers A method is disclosed for producing a vacuum and for separating condensable components present in vapor which accumulates during the production of a polymer by melt-phase polycondensation under vacuum. Vapor produced during the production of polymers by melt-phase p... | 01/08/2008 |
| 7309756 | Methods for converting linear polyesters to macrocyclic oligoester compositions and macrocyclic oligoesters Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a comp... | 12/18/2007 |
| 7271236 | Preparation method of polyester resin A preparation method of a polyester resin includes: under predetermined depolymerization conditions, mixing a polyester resin, a resin dissolvent and a polycondensation catalyst to depolymerize the polyester resin and form a first reaction mixture; adding a first mo... | 09/18/2007 |
| 7241854 | Thermoplastic polyurethanes Thermoplastic polyurethanes are obtainable by reacting (a) isocyanates with (b1) polyesterdiols having a melting point greater than 150° C., (b2) polyetherdiols and/or polyesterdiols, each having a melting point of less than 150° C. and a molecular weight of from ... | 07/10/2007 |
| 7176274 | Saturated polyester for plastic containers with excellent heat resistance and gas impermeability and method for manufacturing the same A method of manufacturing a plastic container includes adding nano-sized silica particles to a saturated polyester in an amount of 20 ppm to 10% by weight during transesterification or esterification and polycondensing an aromatic dicarboxylic acid and ethylene glyc... | 02/13/2007 |
| 7153927 | Process of continuously producing polyesters or copolyesters Process for producing polyesters and copolyesters, wherein a continuous esterification of dicarboxylic esters and diols or a continuous transesterification of dicarboxylic esters with diols is effected in “n” reaction pressure stages connected in series, the pre... | 12/26/2006 |
| 7151143 | Blends containing macrocyclic polyester oligomer and high molecular weight polymer The invention provides blends of macrocyclic polyester oligomer (MPO) with high-molecular-weight polymer and polymerization catalyst as friable, one-component, ready-to-polymerize materials with long shelf life. The invention also provides methods for preparation an... | 12/19/2006 |
| 7138481 | Process for producing polyester resin A polyester resin prepared by polycondensing a dicarboxylic acid component containing terephthalic acid or derivative thereof with a diol component containing ethylene glycol through esterification or transesterification, thereby producing a melt polymerization poly... | 11/21/2006 |
| 7132484 | Continuous process for producing poly (trimethylene terephthalate) A continuous process for the production of poly(trimethylene terephthalate) is disclosed. According to the process, a liquid feed mixture comprising bis-3-hydroxypropyl terephthalate and/or low molecular weight polyesters of 1,3-propanediol and terephthalic acid, th... | 11/07/2006 |
| 7071291 | Isolation, formulation and shaping of macrocyclic oligoesters Processes for isolating, formulating, and shaping macrocyclic oligesters were developed which allow efficient production of macrocyclic oligoesters substantially free from solvent, which may include additives, fillers, and catalysts. ... | 07/04/2006 |
| 7022806 | Methods for converting linear polyesters to macrocyclic oligoester compositions and macrocyclic oligoesters Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a comp... | 04/04/2006 |
| 7015267 | Polyethylene terephthalate compositions A method for increasing the crystallization rate of a polyethylene terepthalate (PET) prepared based on terepthalic acid (TPA) and ethylene glycol monomers, by adding into said TPA-based PET an effective amount of a polyethylene terepthalate prepared based on dimeth... | 03/21/2006 |
| 6994914 | Macrocyclic polyester oligomers and processes for polymerizing the same A water slurry process is used to prepare a prepreg and to manufacture articles from macrocyclic polyester oligomers. In one embodiment, a process for preparing a water suspension of macrocyclic polyester oligomers includes the steps of contacting a macrocyclic poly... | 02/07/2006 |
| 6977023 | Screen printed resin film applique or transfer made from liquid plastic dispersion The present invention is directed to the use of a resin dispersion to form a variety of decorative transfers. The transfers can include a decorative medium such as flock. Primary and secondary carriers are used in some embodiments of the invention. The resin dispers... | 12/20/2005 |
| 6962968 | Purification of macrocyclic oligoesters Acid impurities, such as carboxylic acid-terminated polymers, are removed from macrocyclic oligoesters with ion exchange resins, resulting in macrocyclic oligoesters that are substantially free of acid impurities. The ion exchange resins can be regenerated anew and ... | 11/08/2005 |
| 6960626 | Intimate physical mixtures containing macrocyclic polyester oligomer and filler The invention provides intimate physical mixtures of macrocyclic polyester oligomer (MPO) and filler, as well as methods for their preparation and use. Improved dispersion of filler in a polymer matrix is achieved upon polymerization, and larger amounts of filler wi... | 11/01/2005 |
| 6951954 | Continuous process for producing bis(3-hydroxypropyl) terephthalate A process for the continuous production of at least one of bis(3-hydroxypropyl) terephthalate and low molecular weight oligomers of 1,3-propanediol and terephthalic acid is disclosed. According to the process, preheated 1,3-propanediol (about 150° C. to about 200°... | 10/04/2005 |
| 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 |
| 6905774 | Biaxially-oriented polyester film for fabrication and method of producing the same Biaxially-drawn polyester film for fabrication which is characterized in that it is a film comprising polyester in which ethylene terephthalate units and/or ethylene naphthalate units are the chief structural component, and the melting point of said film is 180-270... | 06/14/2005 |
| 6716959 | Device and method for treating plastic material The invention relates to a method for treating plastic material, especially polyethylene terephthalate, wherein the relatively low temperature material is initially crystallized by heating before subjecting said material to heating or condensation in the solid phase... | 04/06/2004 |
| 6710158 | Methods for making polyester bottle resins having reduced frictional properties The invention is a polyester resin that includes between about 20 and 200 ppm of an inert particulate additive, preferably selected from the group consisting of surface-modified talc and surface-modified calcium carbonate. The invention is also a method of making th... | 03/23/2004 |
| 6652979 | Biaxially-oriented polyester film for fabrication Biaxially-drawn polyester film for fabrication which is characterized in that it is a film comprising polyester in which ethylene terephthalate units and/or ethylene naphthalate units are the chief structural component and containing 0.1-2 wt % of a carna... | 11/25/2003 |
| 6649263 | Polyester resin and industrial yarn process A polyester resin, a method for its preparation, the polyester prepared by the method, a method for manufacturing therefrom at increased productivity a dimensionally stable polyester yarn having a low fray count, and the yarn thereby produced. The polyest... | 11/18/2003 |
| 6630601 | Methods for the preparation or purification of bis-ଲ-hydroxyethyl terephthalate An aromatic polyester is pre-decomposed by heating together with bis-ଲ-hydroxyethyl terephthalate and/or a low condensate thereof and then, reacted with ethylene glycol to convert the terephthalic acid component of the pre-decomposed product into bi... | 10/07/2003 |
| 6613259 | Process of making polyester pellets A process for preparing polyester pellets which involves blending polyethylene terephthalate and polyethylene isophthalate copolymer before solid state polymerization, the polyethylene isophthalate copolymer being composed of dicarboxylic acid constituent... | 09/02/2003 |
| 6604848 | Method for continuously mixing polyester resins In the case of thickening a feed resin without pre-drying, a device is taught to enhance the thickening effect. The device includes a chamber 4 having a mixing rotor therein for continuously mixing a resin between a feed port 2 and a discharge port 3. A p... | 08/12/2003 |
| 6515080 | Process for preparation of polyethylene terephthalate modified by o-phthalic acid units The invention relates to a process to produce polyethylene terephthalate modified with o-phthalic acid units while avoiding any high phthalic acid losses during esterification or polycondensation and while maintaining the favorable use properties effected... | 02/04/2003 |
| 6511624 | Process for preparing industrial polyester multifilament yarn Disclosed is a process for preparing a high modulus and a low shrinkage polyester multifilament yarn of 1000 deniers or more at a spinning rate of 2,000 m/min or more, comprising the steps of: melt-extruding polyester chips having an intrinsic viscosity o... | 01/28/2003 |
| 6403728 | Formed articles from polyester resins Articles from a polyester resin obtained by melt-shaping of the resin added with a polyfunctional compound, capable of increasing the molecular weight of the resin by addition reaction in the solid state with the end groups of the resin and by upgrading t... | 06/11/2002 |
| 6376563 | Inline solid state polymerization of PET flakes for manufacturing plastic strap by removing non-crystalline materials from recycled PET A process for preparing a PET flake mixture for use in connection with the fabrication of high-performance plastic strapping comprises the steps of initially collecting post-consumer and non-post-consumer PET materials having an initially wide range of re... | 04/23/2002 |
| 6372879 | Polyester polycondensation with catalyst and a catalyst enhancer The present invention is based upon the discovery that nontitanyl oxalates can enhance the catalytic functionality of titanyl oxalate catalysts. This invention provides a novel catalytic composition containing a titanyl oxalate catalyst and a metallic oxa... | 04/16/2002 |
| 6353036 | Process for producing unsaturated polyester and unsaturated polyester resin composition A process for producing an unsaturated polyester comprising the steps of (1) (A)depolymerizing polyethylene terephthalate with a polyhydric alcohol, (B) adding maleic anhydride to the depolymerization product to allow them to react with each other, and (C... | 03/05/2002 |
| 6346070 | Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyester The present invention provides a catalyst for polyester production capable of producing a polyester with high catalytic activity and a process for producing a polyester using the catalyst. The catalyst for polyester production comprises a solid titanium c... | 02/12/2002 |
| 6320014 | Polyester pellets Disclosed are polyester pellets made of a polyester which comprises dicarboxylic acid constituent units derived from dicarboxylic acids containing terephthalic acid and isophthalic acid and diol constituent units derived from diols containing ethylene gly... | 11/20/2001 |
| 6288131 | Inline solid state polymerization of pet flakes for manufacturing plastic strap A process for preparing a PET flake mixture for use in connection with the fabrication of high-performance plastic strapping comprises the steps of initially collecting post-consumer and non-post-consumer PET materials having an initially wide range of re... | 09/11/2001 |
