| 摘要 |
An aromatic polyester superior in heat resistance and mechanical properties and satisfactory in lightness and color tone is provided. The aromatic polyester has resorcinol structure, has the formula (1), (1) wherein R is halogen, C1-C5 alkyl, or phenyl; m is an integer of 0 to 2, and when m is 2, the two substituents represented by R may be different from each other; and gives a powder fraction having a lightness (L value) of 70 or more and a red degree (a value) of 5 or less, which powder fraction is obtained by pulverizing the heat-resistant aromatic polyester, sieving the pulverized polyester by Tyler standard sieves and being allowed to pass through 60-mesh sieve but not 325-mesh sieve.
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