Method for the production of a titanium containing catalyst, titanium containing catalyst, method for the production of polyester and polyester
AssigneesCatalytic Technologies Limited, Uhde Inventa-Fischer GmbH
InventorsMatthias SCHOENNAGEL, Alan Thomas COOPER
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Abstract
The present invention is directed to a method for the production of a titanium containing catalyst, wherein a titanium-(IV)-alkoxide of high purity is reacted with an alpha-hydroxy carboxylic acid. Furthermore the invention concerns a titanium containing catalyst allowing for the production of high viscosity polyesters with high thermal stability. In addition, the invention is directed to a method for the production of polyesters and polyesters themselves.
Claims19
A method for the production of a titanium containing catalyst, comprising reacting at least one titanium-(IV)-alkoxide of the general formula
- Ti(OR)4
- wherein each R is the same or different of a linear or branched alkyl with 1 to 32 carbon atoms,
- with at least one alpha-hydroxy carboxylic acid, thereby forming one or more titanium alpha-hydroxy carboxylate species and an alcohol with the formula ROH,
- wherein
- the overall content of the sum of all titanium oxide species, relative to the at least one titanium-(IV)-alkoxide, Ti(OR)4 is ≦10.0 mol.-%.
A titanium containing catalyst, wherein the overall content of the sum of all titanium oxide species relative to the sum of all titanium alpha-hydroxy carboxylate species is ≦10.00 mol. %.
A titanium containing catalyst, comprising one or more titanium alpha-hydroxy carboxylate species.
Dependencies are inferred from the claim text.