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US 5,496,910 AGranted
Hydroxyfunctional thermoplastic polyesters
AssigneeThe Dow Chemical Company
InventorsMichael N. Mang, Jerry E. White, Paul E. Swanson
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Abstract
A biodegradable hydroxy-functional polyester is prepared by contacting a hydroxy-functional aliphatic dicarboxylic acid or a mixture of dicarboxylic acids containing hydroxy-functional aliphatic diacids, with a diglycidyl ether or diglycidyl ester in the presence of an onium catalyst in an ether solvent under conditions suitable for forming the polyester.
Claims15
A thermoplastic polyester having repeating units represented by the formula:
- ##STR7## wherein R.sup.1 is a hydrocarbylene substituted with at least one hydroxyl group, optionally in combination with an unsubstituted aromatic moiety or an unsubstituted hydrocarbylene;
- R.sup.3 is ##STR8## and R.sup.4 is ##STR9## wherein R.sup.2 is independently a divalent aromatic moiety or a hydrocarbylene;
- R.sup.5 is independently hydrogen or lower alkyl;
- R.sup.6 is a divalent aromatic moiety, or a hydrocarbylene optionally substituted with at least one hydroxyl group;
- and n is from 0 to 10.
2 more elements
Dependencies are inferred from the claim text.