| 摘要 |
<p>Melt-moldable crystalline polyester-imides comprising units of the following formula (IA)
<Chemistry id="chema01" num="0001"><Image id="ia01" he="23" wi="157" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or a halogen atom, and n is an integer of 2 to 12,
<UnorderedLists id="ula01" listStyle="none"><ListItem>as main recurring units. The polyester-imides are prepared by (1) condensing a starting mixture containing 1 mole of an imidodicarboxylic acid and 2 to 20 moles of an aromatic monohydroxy compound under heat while distilling water out of the</ListItem><ListItem>reaction system or (1)' condensing a starting mixture comprising 1 mole of trimellitic anhydride, 0.5 to 0.8 mole of an aliphatic diamine and 2 to 20 moles of an aromatic monohydroxy compound under heat, and thereafter (2) polycondensing the resulting reaction mixture under heat with an amount, sufficient to distill substantially all of the aromatic monohydroxy compound from the reaction system, of a diol compound or a mixture of the diol compound and an aliphatic diamine until substantially all of the aromatic monohydroxy compound is distilled out of the reaction system.</ListItem></UnorderedLists></p> |
