| 摘要 |
NEW MATERIAL:bis (beta-hydroxyethyl) 6,6'-(ethylenedioxy) di-2-naphthoate of formula I. USE:A raw material of polyester. The polyester obtained by the polycondensation of the compound has a melting point of as high as nearly 295 deg.C, and gives a molded article having hgih Yound's modulus by melt molding process. PREPARATION:The compound of formula I can be prepared by reacting an alkali metal salt of 2-hydroxy-6-naphthoic acid ester of formula II (R is univalent organic group; M is alkali metal) with 1,2-dihaloethene in ethylene glycol, preferably 0-200 deg.C, especially 70-100 deg.C in the presence of a carbonate as an alkali source.
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