| 摘要 |
PURPOSE:To prevent the generation of inert particles and the deactivation of the catalyst in a catalyst solution for the production of a polyester and containing a phosphorus compound and an antimony compound, by storing the solution at a specific temperature. CONSTITUTION:A catalyst solution fro the production of a polyester and obtained by heat-treating a glycol solution (preferably ethylene glycol solution) of phosphoric acid under refluxing the glycol, and adding an antimony compound (preferably antimony trioxide) thereto, is stored at 50-200 deg.C, preferably 120-180 deg.C. USE:A polyester having excellent color tone, transparency and heat-stability can be prepared by using the above catalyst. |
