| 摘要 |
<p>An aromatic polyester excellent in thermal resistance, mechanical properties and melt moldability and very good in lightness and tone, which has a resorcinol structural unit represented by general formula (1), wherein R represents halogen, C1 to C5 alkyl or phenyl and m represents an integer of 0 to 2, provided that when m is 2, the two R groups may be different from each other. When this polyester is powdered and sieved by means of a Tyler Standard sieve, powders which can pass through a 60-mesh screen but not a 325-mesh screen have a lightness, L, of 70 or above and a redness, alpha , of 5 or less. <CHEM></p> |
