Process to produce polyesters which incorporate isosorbide
First Claim
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1. A process to produce polyesters comprising:
- melt mixing a first polyester which incorporates isosorbide comprised essentially of;
45.0 to 50.0 mole percent of a dicarboxylic acid component;
5.0 to 50.0 mole percent of isosorbide;
0 to 45.0 mole percent of a diol component other than ethylene glycol or di(ethylene glycol); and
0 to 5.0 mole percent of a polyfunctional branching agent component;
with a second polyester comprised essentially of;
45.0 to 50.0 mole percent of a dicarboxylic acid component, 45.0-50.0 mole percent of a diol component other than isosorbide; and
0 to 5.0 mole percent of a polyfunctional branching agent component;
at a temperature and for a time sufficient to effect transesterification, optionally followed by a finishing process.
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Abstract
The present invention provides a process to produce isosorbide-containing polyesters. The process allows for higher isosorbide incorporation than previously found while maintaining high polymeric molecular weights.
17 Citations
9 Claims
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1. A process to produce polyesters comprising:
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melt mixing a first polyester which incorporates isosorbide comprised essentially of;
45.0 to 50.0 mole percent of a dicarboxylic acid component;
5.0 to 50.0 mole percent of isosorbide;
0 to 45.0 mole percent of a diol component other than ethylene glycol or di(ethylene glycol); and
0 to 5.0 mole percent of a polyfunctional branching agent component;
with a second polyester comprised essentially of;
45.0 to 50.0 mole percent of a dicarboxylic acid component, 45.0-50.0 mole percent of a diol component other than isosorbide; and
0 to 5.0 mole percent of a polyfunctional branching agent component;
at a temperature and for a time sufficient to effect transesterification, optionally followed by a finishing process. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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- 2. A polyester comprised essentially of 45 to 50 mole percent of a dicarboxylic acid component, 0.1 to 40 mole percent isosorbide, 10 to 49.9 mole percent of an other diol component, and 0 to 5.0 mole percent of a polyfunctional branching agent component.
Specification