Patent ID: 6593447
Filing Date: 2003-07-15
Classification: C08G

Abstract:
A catalyst for producing a polyester comprising a reaction product of(A) a titanium compound component comprising at least one member selected from the group consisting of: titanium compounds (1) represented by the general formula (I): â€ƒin which formula (I), R1 represents an alkyl group having 2 to 10 carbon atoms and p represents an integer of 1 to 3, and titanium compounds (2) produced by reacting the titanium compounds (1) of the formula (I) with aromatic polycarboxylic acids represented by the general formula (II): â€ƒin which formula (II), n represents an integer of 2 to 4, or anhydrides of the aromatic polycarboxylic acids of the formula (II), with (B) a phosphorus compound component comprising at least one member selected from the phosphonic acid compounds (3) of the general formula (III): â€ƒin which formula (II), R2 represents an unsubstituted or substituted aryl group having 6 to 20 carbon atoms or alkyl group having 1 to 20 carbon atoms, a ratio of the amount of the titanium compound component (A) in terms of a molar amount of titanium atoms (mTi) to the amount of the phosphorus compound component (B) in terms of a molar amount of phosphorus atoms (mp) being in the range of from 1:1 to 1:4.