Polyester stabilization and composition
AssigneeOwens-Illinois, Inc.
InventorsSantos W. Go, Dennis J. Burzynski
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Abstract
Disclosed is a process for preparing a saturated polyester resin containing ##STR1## groups and having good stability against generation of acetaldehyde at elevated temperatures, which comprises having an alkali metal salt of ethylenediaminetetraacetic acid present in the melt polymerization reaction mixture during formation of such polyester, in an amount up to 0.5 mol percent based on the saturated di- and polycarboxylic acid moieties entering into the polymerization reaction, and products.
Claims18
A process for preparing a saturated polyester resin containing ##STR10## groups and having good stability against generation of acetaldehyde at elevated temperatures, which comprises having an alkali metal salt of ethylenediaminetetraacetic acid present in the melt polymerization reaction mixture during formation of such polyester, in an amount up to 0.5 mol percent based on the saturated di- and polycarboxylic acid moieties entering into the polymerization reaction.
A saturated polyester having good stability against thermal degradation to yield acetaldehyde which comprises a saturated polyester having ##STR12## groups in its backbone to which has been added an alkali metal salt of ethylenediaminetetraacetic acid during melt polymerization, in an amount of up to 0.5 mol percent of the combined saturated carboxylic acids present in said polyester.
Dependencies are inferred from the claim text.