Catalyst and method for its production and use
AssigneeZimmer, Inc.
InventorsBrigitta Otto, Karl Ulrich Thiele, Xiaogang Guo
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Abstract
The production of linear polyester by the interchange of ester radicals or esterification and polycondensation of multivalent alcohols with multivalent carboxylic acids takes place by means of catalysts. In order that the catalyst features the lowest possible content of catalytically active metal compound, the carrier substance that forms the heterogeneous phase comprises particles of the finest grain and of porous structure and features a surface of great inner, reactive and/or coordinated centers, whereby a catalytically active metal compound is adsorbed in the pores.
Claims30
A composition consisting of a carrier and a catalyst, wherein
- (a) the catalyst consists essentially of one or more polyester-catalyzing compounds, wherein each polyester-catalyzing compound independently comprises a metal selected from the group consisting of Ti, Sb, Ge, Sn, and Al;
- and
- (b) the carrier comprises porous, fine grain particles with surfaces and pores for adsorption of the polyester catalyst.
Dependencies are inferred from the claim text.