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| Number | Title | Issue Date |
| 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 |
| 6852367 | Stable composition Disclosed are stable organo polysilica resin composition containing a B-staged organo polysilica resin and an organic acid, methods of stabilizing such B-staged organo polysilica resin compositions and methods of manufacturing electronic devices using such stable co... | 02/08/2005 |
| 6780925 | Rubber composition with silica reinforcement obtained with an amino acid or amino acid-containing protein based activator and use thereof in tires The invention relates to the preparation of a silica reinforced rubber composition where alkoxysilane and/or sulfur cure reactions within the elastomer host are controlled by the use of a selected amino acid, or amino acid-containing protein based, activator. The in... | 08/24/2004 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 5898058 | Method of post-polymerization stabilization of high activity catalysts in continuous polyethylene terephthalate production A continuous process for producing polyethylene terephthalate polyester from terephthalic acid and ethylene glycol uses a stabilizer, preferably containing phosphorous, to produce a high quality polyethylene terephthalate polyester which is relatively fre... | 04/27/1999 |
| 5811513 | Process for producing polyethylene naphthalate In the production of polyethylene naphthalate of the present invention, the esterification reaction between naphthalenedicarboxylic acid and ethylene glycol is conducted while causing water to be present in a reaction system from a start of reaction, in t... | 09/22/1998 |
| 5530088 | Heat resistant phosphorus-containing polymeric flame retardant and process for preparing the same A heat resistant phosphorus-containing polymeric flame retardant and a process for preparing the same are disclosed. The process is characterized in that in polycondensation a selected metal salt serving as cocatalyst is used to catalyze a phosphorus-cont... | 06/25/1996 |
| 5423432 | Water-dissipatable polyesters and amides containing near infrared fluorescent compounds copolymerized therein Provided are water-dissipatable, sulfo-containing polyesters and polyester-amides having copolymerized therein thermally stable near infrared flourophoric compounds. The polymers are useful in coating or ink compositions, which are in turn useful for mark... | 06/13/1995 |
| 5294695 | Process for preparing polyethylene naphthalate The present invention relates to a process for preparing a polyethylene naphthalate possessed with high viscosity, characterized by sloving of various problems of the prior art by controlling the rate of the polycondensation reaction. Particularly, the pr... | 03/15/1994 |
| 5292855 | Water-dissipatable polyesters and amides containing near infrared fluorescent compounds copolymerized therein Provided are water-dissipatable, sulfo-containing polyesters and polyester-amides having copolymerized therein thermally stable near infrared flourophoric compounds. The polymers are useful in coating or ink compositions, which are in turn useful for mark... | 03/08/1994 |
| 5262513 | Copolyester, and hollow container and stretched film made thereof A copolyester which comprises, as main components, terephthalic acid as a dicarboxylic acid component and ethylene glycol as a diol component and which is characterized by: (1) isophthalic acid as a dicarboxylic acid component being from 0.5 to 3.0 mol %,... | 11/16/1993 |
| 4435562 | Process for the production of polyester copolymers The invention is a process for esterifying organic dicarboxylic acid and diol at elevated temperatures and thereafter transesterifying the esterification product in the presence of a diol and a diester at elevated temperatures thereafter polymerizing the ... | 03/06/1984 |
| 4394295 | Coordination complexes as polyesterification catalysts The process and the catalyst used therein for producing polyesters and copolyesters, useful for making films and fibers, by the polycondensation of dicarboxylic acids and aliphatic glycols using coordinations complexes of metal halides and silicon compoun... | 07/19/1983 |
| 4258105 | Sealant compositions containing thiol-terminated polyesters A curing agent package is provided for polymercaptan-terminated polymers comprising selected metal oxides and organonitrogen accelerators and promoters commonly considered as rubber vulcanization accelerators. More specifically, sealant and coating compos... | 03/24/1981 |
| 4245086 | Production of N-hydroxyalkyltrimellitic acid imides polymers N-Hydroxyalkyltrimellitic acid imides of high purity are prepared by reacting trimellitic acid anhydride with a monoalkanolamine in an aqueous medium comprising an amount of not less than about 0.025 liter of a certain specific solvent or solvent mixture ... | 01/13/1981 |
| 4205157 | Method for production of high molecular weight polyester with low catalyst level and low carboxyl content A high molecular weight polyester is disclosed, having a low carboxyl content, and utilizing a low catalyst level, produced by a two-stage process; a melt process until the intrinsic viscosity of the prepolymer reaches about between 0.15 and 0.45 dl/g, an... | 05/27/1980 |
| 4156072 | Coordination complexes as polyesterification catalysts A process for producing polyesters and copolyesters, useful for making films and fibers, by the polycondensation of dicarboxylic acids and aliphatic glycols using coordinations complexes of metal halides and silicon compounds as catalysts.... | 05/22/1979 |
| 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 |
