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| Number | Title | Issue Date |
| 8143367 | Method for the esterification of terephtalic acid with butanediol, method for the manufacture of polybutylene terephtalate and a device therefor The present invention relates to an improved method for the esterification of terephthalic acid with 1,4-butanediol, an improved method for the manufacture of polybutylene terephthalate as well as reactors and devices that are suited for the application in this meth... | 03/27/2012 |
| 8063122 | Mixture, polyester composition, film and procedures for their manufacture The present invention relates to mixtures comprising at least one polyester precursor and at least one alkali- and/or alkaline-earth metal salt where the mixture contains at least one phosphonic acid ester of the Formula (I) (RO)OC—R′—PO(OR)2 | 11/22/2011 |
| 8017717 | Method of producing polyesters Polyesters such as polyethylene, polypropylene and polybutylene terephthalate are made from melts of precondensates of polyesters by first conducting vapors comprising precondensate components distributed in the form of an aerosol through a polycondensation reactor ... | 09/13/2011 |
| 7998420 | Method and device for producing vacuum in the production of polyesters and copolyesters The invention relates to a method and a device for producing vacuum in the production of polyesters and copolyesters; unrectified vapors from at least one esterification or transesterification stage is preferably used as a driving medium in gas jet pumps for produci... | 08/16/2011 |
| 7951980 | Process and apparatus for the recovery of ethylene glycol in the production of polyethylene terephthalate A method and apparatus are disclosed for the recovery of ethylene glycol in a polyethylene terephthalate (PET) production process, in which water accumulating in the esterification reaction is mixed with a process fluid containing 2-methyl-1,3-dioxolane (MDO). The m... | 05/31/2011 |
| 7850926 | Process of discontinuous polycondensation and stirring reactor thereof A process for the discontinuous production of granules from polycondensation polymers by precondensation of an oligomer at 5 to 400 mbar and subsequent polycondensation in a stirring reactor and subsequent granulation. In the vicinity of the outlet port, the density... | 12/14/2010 |
| 7829654 | Method for producing elastomeric copolyesters A process for continuous or discontinuous synthesis of elastomeric copolyesters from polybutylene terephthalate (PBT) and polyoxytetramethylene glycol is described in which the tetrahydrofuran (THF) obtained as a byproduct in synthesis of polybutylene terephthalate ... | 11/09/2010 |
| 7550116 | Method for producing polyesters and a disk ring reactor for the method The invention relates to a method and a device for producing polyesters such as for example polyethylene terephthalate, polypropylene terephthalate and polybutylene terephthalate from precondensates. According to said method, vapors comprising precondensate componen... | 06/23/2009 |
| 7547406 | Method for the direct and continuous production of hollow articles from a polymer melt A method of making shaped articles from highly condensed polyester melt and especially preforms for the blow molding of food and especially beverage containers. A melt is continuously withdrawn from the polycondensation reactor and is fed to the shape-imparting unit... | 06/16/2009 |
| 7431058 | Device for changing nozzles The invention relates to a device which enables nozzles to be changed without changing the pressure conditions in the container or device associated therewith. According to the invention a connector piece support (2) is fixed to a pressurised container (1 | 10/07/2008 |
| 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 |
| 7300999 | Method of making polyesters Thermoplastic polyesters are made by a method in which precondensation is carried in a column whose sections are formed with structured packings and operated at subatmospheric, pressure. ... | 11/27/2007 |
