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| Number | Title | Issue Date |
| 7332562 | Biodegradable linear random copolyester and process for preparing it and use of the same The present invention relates to a biodegradable copolyester of high molecular weight and narrow molecular weight distribution. The copolyester has a Mw of 100,000-600,000 g/mol, and a molecular weight distribution of 1.2-3. The process for synthesizing t... | 02/19/2008 |
| 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 |
| 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 |
| 7129317 | Slow-crystallizing polyester resins The present invention relates to slow-crystallizing polyethylene terephthalate resins that possess a significantly higher heating crystallization exotherm peak temperature (TCH) as compared with those of conventional antimony-catalyzed polyethylene tereph... | 10/31/2006 |
| 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 |
| 6998079 | Process of making partially oriented poly(trimethylene terephthalate) yarn A stable partially oriented poly(trimethylene terephthalate) yarn suitable for use in subsequent drawing and/or draw-texturing operations characterized by an elongation to break of at least 110%, and a process for false-twist texturing a partially oriented poly(trim... | 02/14/2006 |
| 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 |
| 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 |
| 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 |
| 6399716 | Copolyester resin composition and a process of preparation thereof An aromatic group containing copolyester resin composition which has good biodegradability and physical properties, wherein; (i) 0.1 wt % to 30 wt % of an aliphatic prepolymers having number average molecular weight of from 300 to 30,000; (ii) one or a pl... | 06/04/2002 |
| 6022603 | Ethylene terephthalate/ethylene-2,6-naphthalene-dicarboxylate copolymers for bottles An ethylene terephthalate/ethylene-2,6-naphthalene dicarboxylate copolymer comprising 2,6-naphthalenedicarboxylic acid in an amount of 5 to 20 mol % of the total of all dicarboxylic acid components. This copolymer contains Mn, Mg and Co derived from catal... | 02/08/2000 |
| 5993958 | Method of manufacturing a polyester-series photographic support There is disclosed a method of manufacturing a polyester-series photographic support, comprising the steps of: incorporating at least one anthraquinone-series dye into a polyester, which polyester is produced by a condensation polymerization reaction of a... | 11/30/1999 |
| 5977269 | Polyester/vinyl dioxolane based coating compositions The present invention provides polyester/vinyl dioxolane based coating compositions containing no or essentially no volatile organic components. Oligomers for forming the coating compositions of the present invention are vinyl dioxolane end-capped polyest... | 11/02/1999 |
| 5391700 | Process for producing polyester by ring-opening copolymerization This invention provides a process for producing with industrially good efficiency a polyester having a high melting point and biodegradability. In this process, ring-opening copolymerization of a cyclic acid anhydride containing succinic anhydride as a ma... | 02/21/1995 |
| 5340909 | Poly(1,3-propylene terephthalate) A process for producing poly(1,3-propylene terephthalate) from the reaction of either terephthalic acid or a lower dialkyl ester of terephthalic acid and 1,3-propanediol and polymerization of the monomer produced therefrom using a novel catalyst system. T... | 08/23/1994 |
| 5188774 | Aromatic polyester film and process for producing the same The present invention enables production of an aromatic polyester film having no surface defect and a uniform thickness, while achieving a high productivity, by allowing a molten film of an aromatic polyester to adhere onto a rotating cooling drum to cool... | 02/23/1993 |
| 4654413 | Manufacturing of high molecular weight polyester A polybutylene terephthalate is manufactured by the steps of polycondensating in the liquid phase terephthalic acid or a lower alcohol ester thereof as the acid component and 1,4-butanediol as the diol component to obtain a prepolymer of polybutylene tere... | 03/31/1987 |
| 4604453 | Polyester composition A polyester having an initial accumulation electric charge of not less than 2.9 μc/mm2 when determined in a melt state according to the method as hereinabove defined and a heat resistance of not more than 0.210 when determined according to the... | 08/05/1986 |
| 4170697 | Process for the production of polyisocyanate silicate solid or cellular solid products Silicon halides will react chemically with polyols to produce polyol silicate resinous products which will react chemically with polyisocyanates to produce polyisocyanate silicate solid or cellular solid products.... | 10/09/1979 |
| 4124566 | Process for preparing polyesters A process for preparing polyesters having superior thermal stability, transparency and chemical resistance, which comprises (1) a first step of esterifying (A) a difunctional carboxylic acid containing at least 60 mole% of an aromatic dicarboxylic acid, (... | 11/07/1978 |
| 4096122 | Process for the production of polyesters of 1,4-butanediol A process for producing a linear polyester which comprises: (1) condensing excess 1,4-butanediol with a lower alkyl ester of an aromatic dicarboxylic acid at a temperature of less than 200° C; (2) removing uncondensed 1,4-butanediol therefrom so that the reaction ... | 06/20/1978 |
