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| Number | Title | Issue Date |
| 7759450 | Polytrimethylene terephthalate resin and method for producing the same A polytrimethylene terephthalate resin comprising 60 to 100 mole % of (a) trimethylene terephthalate recurring units, and 0 to 40 mole % of (b) at least one monomer unit obtained from a comonomer copolymerizable with at least one of the monomers used for forming the... | 07/20/2010 |
| 7439317 | Amorphous polyester chip and method for production thereof, and method for storage of amorphous polyester chip An amorphous polyester chip having superior processing ability is characterized by a moisture content of not more than 300 ppm and a fine particle content of not more than 500 ppm. A preferred embodiment is a copolymerized polyester chip comprising a main repeating ... | 10/21/2008 |
| 7342086 | Aliphatic polyester polyether copolymer, process for producing the same and aliphatic polyester composition using the copolymer An aliphatic polyester polyether copolymer is provided having an aliphatic polyester moiety comprising 35 to 50 molar % of an aliphatic diol unit, 35 to 50 molar % of an aliphatic dicarboxylic acid unit and 0 to 30 molar % of an aliphatic oxycarboxylic acid unit and... | 03/11/2008 |
| 7329703 | Polymerized macrocyclic oligomer nanocomposite compositions The invention relates to polymers derived from macrocyclic oligomers containing organo clay fillers comprising a) a polymer derived from a macrocyclic oligomer; b) clay platelets; and c) the residue of one or more onium compounds having at least one ligand with a C | 02/12/2008 |
| 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 |
| 7282555 | Method for incorporating nitrogen containing methine light absorbers in pet and compositions thereof The present invention is a method for efficiently incorporating a nitrogen containing methine light absorber into a polyester resin. The method includes forming a reaction mixture comprising combining a diol component, a diacid component selected from the group cons... | 10/16/2007 |
| 7279545 | Production method of biodegradable plastic and apparatus for use in production thereof The present invention provides a production method of biodegradable plastic in which polylactic acid is directly synthesized from lactic acid without employing the conventional route of polylactic acid synthesis from lactic acid via lactide, and apparatus for use in... | 10/09/2007 |
| 7259227 | Method for continuous production of high-molecular weight polyesters and device for implementation of the method The invention relates to a method for producing high-molecular weight polyesters, such as e.g. polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polynaphthalene terephthalate (PEN), polytrimethylene terephthalate (PTT) and/or polyesters of other di... | 08/21/2007 |
| 7253250 | Simplified method of producing biodegradable aliphatic polyesters A method of synthesizing biodegradable aliphatic polyesters from one or more aliphatic dicarboxylic acids or diesters of the said acids and one or more linear or branched aliphatic glycols, comprising a first esterification or transesterification step and a second d... | 08/07/2007 |
| 7241855 | Method for the manufacture of polyesters A method is described for the manufacture of polyesters of aromatic dicarboxylic acids with aliphatic and/or cycloaliphatic dials, in which an aromatic dicarboxylic acid in the presence of a monocarboxylic acid or a mixture of a monocarboxylic acid present in a satu... | 07/10/2007 |
| 7199212 | Polymerization catalyst for polyesters, polyesters produced with the same and process for producing polyesters A novel polymerization catalyst for polyesters, which does not contain any germanium or antimony compound as the main component; polyesters produced with the catalyst; and a process for producing polyesters. This polymerization catalyst is excellent in catalytic act... | 04/03/2007 |
| 7196160 | Catalysts and methods for polymerizing macrocyclic oligomers Cyclic oligomers containing ester linkages are polymerized in the presence of a catalyst having at least one oxygen atom bonded to two metal atoms. At least one of the metal atoms is a tin atom, which is preferably tetravalent, i.e., bonded to three other groups in ... | 03/27/2007 |
| 7179869 | Process for producing polyester resins In the invention, a polyester resin having dicarboxylic acid constitutional units and diol constitutional units wherein 5 to 60 mol % of the diol constitutional units has a cyclic acetal skeleton is produced by a process including an oligomerization step and a polym... | 02/20/2007 |
| 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 |
| 7157032 | Method and apparatus for making crystalline PET pellets A method and apparatus for underwater pelletizing and subsequent drying of polyethylene terephthalate (PET) polymers and other high temperature crystallizing polymeric materials to crystallize the polymer pellets without subsequent heating. High velocity air or othe... | 01/02/2007 |
| 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 |
| 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 |
| 7052764 | Shaped articles comprising poly[(trimethylene-co-dianhydrosugar ester) dicarboxylate] or poly(trimethylene-co-dianhydro-dicarboxylate with improved stability A shaped article comprising poly[(trimethylene-co-dianhydrosugar ester) dicarboxylate] or poly(trimethylene-co-dianhydro-dicarboxylate having improved stability in the form of less change of Tg and reduced shrinkage upon storage at elevated temperature is disclosed.... | 05/30/2006 |
| 7048995 | Polyester resin, molded product made thereof and process for production of polyester resin A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at leas... | 05/23/2006 |
| 7049390 | Poly(1,3-propylene-co-1,4:3,6-dianhydro-D-sorbitol terephthalate) and manufacturing process A melt polymerization process for the preparation of poly(1,3-propylene-co-isosorbide) terephthalate (3GIT), new 3GITs and products made from the 3GITs. The process comprises (a) providing a mixture comprising terephthalic acid or its alkyl ester, 1,3-propanediol an... | 05/23/2006 |
| 7049041 | Resin for toner binder and toner composition The present invention provides a toner binder for developing electrostatic charge images, which binder comprises a polycondensate polyester resin, said polyester resin being a product formed in the presence of at l... | 05/23/2006 |
| 7026035 | Laminated film for optical use There is provided a laminated film for optical use comprising a polyester film which has a lubricity layer containing globular particles in at least one side thereof, wherein the laminated film has a thickness irregularity of 0.5 to 7.0%, and wherein the polyester f... | 04/11/2006 |
| 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 |
| 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 |
| 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 180-270Â... | 06/14/2005 |
| 6861498 | Glyceryl citrate polyesters in personal care The present invention relates to specific glyceryl alkoxylated citrate esters and their use in lipsticks. These polymers not only do not have a mal taste, but also have a very pleasant taste. This coupled with their use to prevent syneresis in lipsticks, make these ... | 03/01/2005 |
| 6858701 | Wholly aromatic polyester carbonate and process therefor A wholly aromatic polyester carbonate having a good color and excellent heat resistant stability. This polymer had an extremely low alkali metal content of 10 ppm or less. This polymer is advantageously produced by reacting an aromatic dicarboxylic acid, aromatic di... | 02/22/2005 |
| 6855798 | 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... | 02/15/2005 |
| 6852789 | Glycols starting materials containing dispersed superfine ceramic powder coagulates capable of forming polyester molded bodies having high mechanical strength and transparency Glycol starting materials for manufacturing a polyester molded body containing 1 to 20% by weight of dispersed superfine ceramic powder aggregates relative to the total weight of the glycol for enabling polyester molded bodies having a high mechanical strength and t... | 02/08/2005 |
| 6783827 | Method or decreasing the cyclic oligomer content in polyester product The present invention relates to a method for decreasing the cyclic oligomer content level in the manufacturing process of polyethylene terephthalate (PET) and in the PET products produced from said process by adding calcium phosphate at least one selected from the ... | 08/31/2004 |
| 6737481 | Ester-modified dicarboxylate polymers A polymer comprising poly(alkylene-co-dianhydrosugar ester) dicarboxylate and its preparation by reacting an alkylene diol, terephthalic acid, and a moiety of formula 1 X-Ia-(A-I)n-Ab-X  Formula 1 ... | 05/18/2004 |
| 6733873 | Polyester film as support for dry film resist A polyester film for dry film resists, which satisfies requirements for transparency, particularly transmittance of radiation having a wavelength around 365 nm, slipperiness, winding properties, resolution and recyclability. A polyester film for dry film resists whi... | 05/11/2004 |
| 6706396 | Processes for producing very low IV polyester resin The present invention provides processes for producing certain very low inherent viscosity polyesters. Also provided are the low inherent viscosity polyesters in discrete particulate form, and processes for producing the particulate polyesters. The discrete particul... | 03/16/2004 |
| 6703474 | Polyester resin, molded product made thereof and process for production of polyester resin A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence... | 03/09/2004 |
| 6667383 | Polyester resin and process for its production A polyester resin is prepared by polycondensing a dicarboxylic acid component containing terephthalic acid or its ester-forming derivative as the main component, and a diol component containing ethylene glycol as the main component in the presence of (1) ... | 12/23/2003 |
