Color stable aromatic polyesters
AssigneeStandard Oil Company (Indiana)
InventorJames Spanswick
Life of this patent
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Abstract
Color stable compositions consisting of aromatic polyester and 0.01 to 0.5% by weight of the aromatic polyester of a stabilizer selected from the group consisting of phosphates, phosphonates and mixtures of either phosphates or phosphonates with epoxides having a boiling point of above about 250.degree. C. These compositions are useful in the manufacture of engineering plastics such as automobile headlights.
Claims10
A color stable composition consisting essentially of aromatic polyester and a stabilizing quantity of a stabilizer selected from the group of mixtures of either organic phosphates or phosphonates with epoxides having a boiling point above 250.degree. C. said stabilizer mixtures individually or in combination being about 0.01 to 0.5% by weight of the aromatic polyester.
A color stable composition consisting essentially of aromatic polyester and a stabilizing quantity of a stabilizer selected from the group of mixtures of O,O-di-n-octadecyl-3, 5-di-tert-butyl-4-hydroxy benzyl phosphonate and epoxides having a boiling point above 250.degree. C., said stabilizer mixtures individually or in a combination being about 0.01 to 0.5% by weight of the aromatic polyester.
A color stable composition consisting essentially of aromatic polyester and a stabilizing quantity of a stabilizer selected from the group of mixtures of O,O-di-n-octadeyl-3, 5-di-tert-butyl-4-hydroxy benzyl phosphonate and ##STR4## said stabilizer mixtures indivdually or in combination being about 0.01 to 0.5 percent by weight of the aromatic polyester.
A color stable composition consisting essentially of aromatic polyester and a stabilizing quantity of stabilizer selected from the group of mixtures of 2,6-di-t-butylphenyl phosphate and ##STR5## said stabilizer mixtures individually or in combination being about 0.01 to 0.5 percent by weight of the aromatic polyester.
Dependencies are inferred from the claim text.