| 摘要 |
A stable catalyst solution suitable for catalyzing the polycondensation o f reactants to make polyester polymers comprising: (i) M, wherein M is repre sented by an alkaline earth metal or alkali metal and (ii) aluminum and (iii ) ethylene glycol and (iii) organic hydroxyacid compounds having at least th ree carbon atoms and less than three carboxylic acid groups when the hydroxy acid compound has 8 or less carbon atoms, wherein the molar ratio of ethylen e glycol:aluminum is at least 35:1. The hydroxyacid compounds enhance to sol ubility of M and Al in ethylene glycol, even at even at molar ratios of M:AI approaching 1:1. There is also provided a method for the manufacture of the composition, its feed to and use in the manufacture of a polyester polymer, and, polyester polymers obtained by combining certain ingredients or contai ning the residues of these ingredients in the composition. |
