Melt polymerization process for preparing aromatic polyesters
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United States of America Patent
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Dec 29, 1998
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N/A
app pub date -
Jan 15, 1997
filing date -
Jan 15, 1997
priority date (Note) -
Expired
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Abstract
A process for preparing a polyester which includes the step of heating a reaction mixture comprising (i) diesters of dihydric phenols and C.sub.1-10 aliphatic monoacids, (ii) aromatic dicarboxylic acids, and (iii) a catalytic amount of an organic cation-containing salt at a temperature above the melt temperature of the diesters, under reaction conditions sufficient to form the corresponding polyester. Use of this process subjects the polymers prepared thereby to a thermal history which causes relatively little deterioration of the polymer's properties.
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