| 摘要 |
Process for the production of injection moulded and extrusion moulded polyesters from diols and dicarboxylic acids of which at least 85 mol. percent consists of terephthalic acid, which process consists of condensing in the polyester 0.001 to 1 mol. percent of at least one compound bearing not less than three polyester-forming functional groups, such as OH and/or COOH groups, and incorporating in the polyester, either before or during processing, 0.001 to 2 percent by weight, in relation to the total amount of monomer units, of at least one substance which promotes crystallization.
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