| 摘要 |
<p>Essentially colorless, high molecular weight n are retardant compositions comprised of copolyester prepared from a dicarboxylic acid or a C1 - C4 lower alkyl ester thereof, a glycol and a halogenated diol compound selected from the group consisting of 2,2'-bis ¢4(.beta.-hydroxyethoxy)-3,5-dibromopbenyl! propane and 2,2'bis¢4(.beta.-hydroxyethoxy!-3,5-dichlorophenyl! propane employing a modified esterification-polycondensation or transesterification-polycondensation reaction process.</p> |
