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US 2009/0275697 A1Published application
Manufacturing process for liquid crystalline polymer
AssigneeTicona LLC
InventorsMarion Glen Waggoner, Richard Alan Jackson
Life of this patent
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Abstract
The properties of a liquid crystalline polymer (LCP) containing ester linkages and made in the presence of an excess of diol are improved by treating the LCP with a dicarboxylic acid at elevated temperature. The resulting LCPs are useful as molding resins and for films.
Claims21
A process comprising:
- (a) forming a liquid crystalline polymer from ingredients comprising one or more first dicarboxylic acids, aliphatic diesters of one or more first diols and optionally aliphatic esters of one or more hydroxycarboxylic acids;
- and
- (b) contacting said liquid crystalline polymer with about 2 to about 200 milliequivalents per kg of said liquid crystalline polymer of a second dicarboxylic acid, at a temperature sufficient to cause reaction of said second dicarboxylic acid with said liquid crystalline polymer for a period of time sufficient to cause at least about a 10% increase in the tensile elongation of said liquid crystalline polymer;
- provided that the molar ratio of the total of aliphatic diesters of first diols present to the total of first dicarboxylic acids present in (a) is 1.01 or more.
1 more element
Dependencies are inferred from the claim text.