- Patent Title: Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures thereof and an apparatus therefor
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Application No.: US12302254Application Date: 2007-05-31
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Publication No.: US08110149B2Publication Date: 2012-02-07
- Inventor: Eike Schulz Van Endert
- Applicant: Eike Schulz Van Endert
- Applicant Address: DE Berlin
- Assignee: Uhde Inventa-Fischer GmbH
- Current Assignee: Uhde Inventa-Fischer GmbH
- Current Assignee Address: DE Berlin
- Agency: Barnes & Thornburg LLP
- Priority: DE102006025942 20060602
- International Application: PCT/EP2007/004835 WO 20070531
- International Announcement: WO2007/140925 WO 20071213
- Main IPC: B01J19/18
- IPC: B01J19/18 ; B01J19/00 ; B01J8/00 ; B01J8/04 ; B01J8/02 ; B01J35/02 ; C08F2/00 ; C08G63/00

Abstract:
The present invention relates to a method for the continuous production of high-molecular polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acid esters with diols and/or mixtures thereof in the presence of catalysts with formation of a prepolymer in a tower reactor and polycondensation thereof to form a high-molecular polyester in a polycondensation reactor, a prepolymer with >40 to 70 repeat units (DP) being produced in the tower reactor and this prepolymer being polycondensed in only one further reactor to form a polyester with >150 to 205 DP.
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