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| Number | Title | Issue Date |
| 8003751 | Oxygen scavenging polymers A polymer with a backbone and an unsaturated side chain attached to the backbone. The polymer may optionally be combined with an oxidation catalyst and/or other ingredients. ... | 08/23/2011 |
| 7358328 | Method and device for increasing the intrinsic viscosity of polyester material by means of solid phase polymerisation The invention relates to a process and a device for increasing the intrinsic viscosity of a polyester material by solid-state polymerization, wherein the polyester material is heat-treated in a heat treatment container (6), the polyester material being introd... | 04/15/2008 |
| 7294044 | Slurry composition and method for polishing organic polymer-based ophthalmic substrates The present invention provides a slurry composition and method for polishing organic polymer-based ophthalmic substrates. The slurry composition according to the invention includes an aqueous dispersion of abrasive particles and a pyrrolidone compound. The abrasive ... | 11/13/2007 |
| 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 |
| 7264913 | Antireflective compositions for photoresists The present invention relates to a novel antireflective coating composition comprising a polymer, a crosslinking agent and an acid generator. The present invention further relates to a process for using the novel composition, particularly at 193 nm. The polymer of t... | 09/04/2007 |
| 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 |
| 7211634 | Process for the preparation of polyesters containing 1,4-cyclohexanedimethanol Disclosed is a process for the preparation of high molecular weight polyesters by reacting one or more dicarboxylic acids directly with 1,4-cyclohexanedimethanol and, optionally, one or more diols. The process uses an overall diol to dicarboxylic acid molar ratio of... | 05/01/2007 |
| 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 |
| 7144974 | Polyester production method, polyester composition, and polyester fiber In a polyester production method, a titanium compound having a radical selected from a carbonyl group, a carboxyl group, or an ester group, and a phosphorous compound having a structure illustrated in Formula (I), are added | 12/05/2006 |
| 7144614 | Polyester polymerization catalyst, polyester produced by using the same, and process for producing polyester This invention provides a novel polymerization catalyst other than antimony compounds, polyester produced by using the same and a process for producing polyester. The polycondensation catalyst of this invention is a polyester polymerization catalyst comprising an al... | 12/05/2006 |
| 7060778 | Ytterbium(III) acetylacetonate as a catalyst for the preparation of aliphatic oligocarbonate polyols Ytterbium(III) acetylacetonate is used as a catalyst for the preparation of aliphatic oligocarbonate polyols by transesterification of at least one organic carbonate with at least one aliphatic polyol. ... | 06/13/2006 |
| 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 |
| 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 |
| 6998462 | Polyester process Disclosed is a process that comprises contacting, in the presence of an esterification or transesterification or polycondensation catalyst composition, a toner, and a phosphorus compound, a carbonyl compound and an alcohol under a condition suitable for esterificati... | 02/14/2006 |
| 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 |
| 6855797 | Stable aqueous solutions comprising titanium and zinc and process therewith A process that can be used as catalyst in esterification, transesterification or polycondensation is disclosed, which comprises a stable solution comprising (a) titanium in the form of a titanium α-hydroxycarboxylic acid or its salt, (b) a C1-C6 | 02/15/2005 |
| 6828410 | Method for preparing poly(cyclohexane-1,4-dicarboxylate)s from cyclohexane-1,4-dicarboxylic acid, and composition Poly(1,4-cyclohexanedicarboxylate)s, especially poly(1,4-cyclohexanedimethylene-1,4-cyclohexanedicarboxylate), are prepared from at least one relatively non-volatile diol, such as 1,4-cyclohexanedimethanol, and cyclohexane-1,4-dicarboxylic acid by an esterification ... | 12/07/2004 |
| 6787630 | Process for the preparation of heat-stable, antimony-free polyesters of neutral color and the products which can be prepared by this process Process for the preparation of heat-stable, antimony-free polyesters of neutral color and the products which can be prepared by this process A process for the preparation of heat-stable, antimony-free polyesters of neutral color by esterification of aromatic ... | 09/07/2004 |
| 6780962 | (Meth)acrylic ester binders from glycolyzed aromatic polyesters Described are methacrylate or acrylate binders e.g. obtainable by the steps of (i) generating OH-precursors from at least one aromatic polyester, and (ii) reacting said OH-precursors of step (i) with methacrylic acid and/or acrylic acid to form a respective ester, w... | 08/24/2004 |
| 6774204 | Polyester and process therefor A composition and a process for producing the composition are disclosed. The composition comprises (1) repeat units derived from a carbonyl compound and a glycol and (2) one or more ultrafine metal oxides. The process can comprise (1) contacting, in the presence of ... | 08/10/2004 |
| 6762276 | Hydrogenation of polyester oligomers containing terephthalic acid residues Disclosed is a process of hydrogenating a polyester oligomer containing terephthalic acid residues wherein terephthalic acid residues are converted to residues of 1,4-cyclohexanedicarboxylic acid. Also disclosed is a process for the preparation of polyesters contain... | 07/13/2004 |
| 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 |
| 6663961 | Process for preparation of polyester-based polymers This invention is related to a process for preparing polyester polymers using a composite catalyst comprises the steps of 1) esterifying naphthalene dicarboxylic acid or a dicarboxylic acids containing NDCA or ester derivatives thereof, with ethylene glyc... | 12/16/2003 |
| 6657036 | Polycondensation resins and polyaddition resins produced by heterogeneous catalysis The invention relates to polycondensation resins which are prepared by polycondensation of compounds having a low molecular weight and separation of small molecules in the presence of at least one hetergeneous catalyst. The invention also relates to polya... | 12/02/2003 |
| 6657044 | Process for making polytrimethylene terephthalate An improved process for the polymerization of polytrimethylene terephthalate by esterification of terephthalic acid or dimethylterephthalate with 1,3-propanediol (PDO), precondensation of the esterification product to produce a precondensation product, an... | 12/02/2003 |
| 6649731 | Catalysts for polyester production, process for producing polyester, and polyester By the present invention, there are provided a catalyst for polyester preparation, which comprises a solid titanium compound containing titanium, oxygen, carbon and hydrogen and having a Ti--O bond and which has a maximum solubility in ethylene glycol, as... | 11/18/2003 |
| 6610796 | Flame retardant polybutyleneterephthalate resin Disclosed is a flame retardant polybutyleneterephthalate resin prepared be copolymerizing a phosphorus-based flame retardant represented by the following formula I and a butyleneterephthalate unit: ##STR1## wherein R1 and R2 are ... | 08/26/2003 |
| 6582818 | Polyesters having a controlled melting point and fibers formed therefrom The invention relates to fibers, particularly binder fibers, made from polyesters and the polyesters themselves. The polyesters are the product of a reaction between a glycol component and a dicarboxylic acid component where the glycol component contains ... | 06/24/2003 |
| 6544611 | Oxygen scavenging PET based polymer The present invention improves the effectiveness of the oxygen scavenging composition and maintains an excellent balance in the color properties of the polymer. The present invention relates to an improved oxygen scavenging PET based copolymer comprising ... | 04/08/2003 |
| 6528579 | Zero-heel polyester process The invention relates to a process for the preparation of polyesters of a glycol and a dicarboxylic acid which comprises the following steps: a) introducing a feedstock comprising one or more glycols and one or more dicarboxylic acids or monoalcohol esters the... | 03/04/2003 |
| 6489434 | Manufacturing method of copolyester for low acetaldehyde content of PET bottles The present invention provides a manufacturing method of copolyester for low acetaldehyde content of PET bottles. The polyethylene terephthalate (PET) polymer is added with an appropriate modifier in order to decrease the production of acetaldehyde caused... | 12/03/2002 |
| 6472500 | Crystalline polyester resins and processes for their preparation An improved process for the preparation of high molecular weight, linear polyester resins comprises reacting an aromatic dicarboxylic acid with an excess of an alkane diol under conditions effective to reach the clearing point of the reaction; pre-condens... | 10/29/2002 |
| 6444018 | Phase change ink carrier compositions containing anhydride/amino alcohol-based adducts A phase change ink carrier composition comprising at least one anhydride/amino alcohol based adduct which is a reaction product of at least one anhydride and at least one amino alcohol, wherein the reaction product is an ester material or an amide materia... | 09/03/2002 |
| 6437088 | Process for producing polyester with coated titanium dioxide A process for producing a polyester. The process comprises polymerizing a polymerization mixture comprising (i) a carbonyl compound or an oligomer of a carbonyl compound and (ii) a glycol, in the presence of a titanium catalyst composition, to produce the... | 08/20/2002 |
| 6423814 | Polyester resin composition A polyester resin composition is disclosed, comprising poly(trimethylene terephthalate) in a proportion of 90 wt % or more, wherein the resin composition has an intrinsic viscosity of from 0.4 to 2 and contains a phosphorus compound corresponding to from ... | 07/23/2002 |
| 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 |
| 6316584 | Method for producing polyesters and copolyesters For the production of polyesters and copolyesters, coprecipitates are used individually or in a mixture as polycondensation catalysts, the coprecipitates being prepared by simultaneous hydrolytic precipitation of a titanium compound and a metallic compoun... | 11/13/2001 |
| 6313235 | Method for preparing polypropylene terephthalate/polyethylene terephtalate copolyester The present invention provides a method for preparing polypropylene terephthalate/polyethylene terephthalate (PPT/PET) copolyester, which comprises a group of processes from (a) to (e). Process (a) comprises subjecting bis-2-hydroxyethyl terephthalate (BH... | 11/06/2001 |
| 6291122 | Polyesters A branched polyester resin of the Formula ##STR1## wherein n and m represent randomly repeating segments, and the number of n and m segments in the polymer backbone are each of from about 10 to about 10,000; X is an alkylene group, an olefinic group, or a... | 09/18/2001 |
| 6271338 | Polyethylene naphthalenedicarboxylate resin composition Provided is a polyethylene naphthalenedicarboxylate resin composition having excellent transparency and hue, and containing a cobalt compound as a color-controlling agent, wherein the polyethylene naphthalenedicarboxylate resin composition comprises a pol... | 08/07/2001 |
