| 摘要 |
IN A PROCESS OF PRODUCING PBT,A MIXTURE OF BDO AND TPA IS ESTERIFIED IN THE PRESENCE OF A CATALYST SOLUTION, AND THE ESTERIFICATION PRODUCT IS POLYCONDENSATED. TO AVOID THE FORMATION OF DEPOSITS IN THE PBT, THE CATALYST SOLUTION CONTAINS 0.05 TO 10 WT-% ALKYL TITANATE, 85 TO 99 WT-% BDO, 50 TO 50,000 PPM BIFUNCTIONAL CARBOXYLIC ACID EQUIVALENTS AND/OR MONOFUNCTIONAL HYDROXYCARBOXYLIC ACID EQUIVALENTS AND NOT MORE THAN 0.5 WT-% WATER.(FIG 1)
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