ECSP951602A - PROCEDURE FOR THE REPAIR OF POLYESTERS AND COPOLIESTERS - Google Patents

PROCEDURE FOR THE REPAIR OF POLYESTERS AND COPOLIESTERS

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Publication number
ECSP951602A
ECSP951602A ECSP951602A ECSP951602A EC SP951602 A ECSP951602 A EC SP951602A EC SP951602 A ECSP951602 A EC SP951602A EC SP951602 A ECSP951602 A EC SP951602A
Authority
EC
Ecuador
Prior art keywords
polycondensation
precipitate
polyesters
titanium dioxide
dioxide
Prior art date
Application number
Other languages
Spanish (es)
Inventor
Michael Martl
Thomas Mezger
Gerriet Oberlein
Klaus Haferland
Bertram Boehringer
Ulrich Berger
Bernhard Kuhn
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to ECSP951602 priority Critical patent/ECSP951602A/en
Publication of ECSP951602A publication Critical patent/ECSP951602A/en

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  • Polyesters Or Polycarbonates (AREA)

Abstract

Procedimiento para la preparación de poliésteres y copoliésteres mediante policondensación de componentes de partida formadores de poliésteres, en el que en una primera etapa de reacción se preparan ésteres u oligoésteres que se policondensan en una segunda etapa de racción en presencia de catalizadores de titanio, caracterizado porque en la etapa de policondensación para la policondensación de los ésteres u oligoésteres se emplea como catalizador de policondensación un precipitado de dióxido se titanio y/o un coprecipiotado de dióxido de titanio/dióxido de silicio con una composición. Ti 02:Si02 de >90:10 mo1/mo1 y o un coprecipitado de dióxido de titanio/dióxido de zirconio con una composición de Ti 02: Zr 02 de > 95:5 mol/mol, que han sido obtenidos por precipitación hidrolítica de los correspondientes alcoholatos de metales formados a partir de alcoholes monovalentes o polivalentes.Process for the preparation of polyesters and copolyesters by polycondensation of polyester-forming starting components, in which esters or oligoesters are prepared in a first reaction stage which are polycondensed in a second reaction stage in the presence of titanium catalysts, characterized in that In the polycondensation step for polycondensation of the esters or oligoesters, a precipitate of titanium dioxide and / or a co-precipitate of titanium dioxide / silicon dioxide with a composition is used as the polycondensation catalyst. Ti 02: Si02 of> 90:10 mo1 / mo1 and or a co-precipitate of titanium dioxide / zirconium dioxide with a composition of Ti 02: Zr 02 of> 95: 5 mol / mol, which have been obtained by hydrolytic precipitation of the Corresponding metal alcoholates formed from monovalent or polyvalent alcohols.

ECSP951602 1995-12-07 1995-12-07 PROCEDURE FOR THE REPAIR OF POLYESTERS AND COPOLIESTERS ECSP951602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ECSP951602 ECSP951602A (en) 1995-12-07 1995-12-07 PROCEDURE FOR THE REPAIR OF POLYESTERS AND COPOLIESTERS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ECSP951602 ECSP951602A (en) 1995-12-07 1995-12-07 PROCEDURE FOR THE REPAIR OF POLYESTERS AND COPOLIESTERS

Publications (1)

Publication Number Publication Date
ECSP951602A true ECSP951602A (en) 1997-07-28

Family

ID=42042244

Family Applications (1)

Application Number Title Priority Date Filing Date
ECSP951602 ECSP951602A (en) 1995-12-07 1995-12-07 PROCEDURE FOR THE REPAIR OF POLYESTERS AND COPOLIESTERS

Country Status (1)

Country Link
EC (1) ECSP951602A (en)

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