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US 4,066,617 AGranted
Stabilized poly(alkylene terephthalates)
AssigneeMobay Chemical Corporation
InventorsHerbert L. Rawlings, Arthur L. Baron
Life of this patent
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Abstract
Poly(alkylene terephthalates) are stabilized during high temperature processing by neutral esters of phosphorous acid having at least one oxetane group. The stabilized poly(alkylene terephthalates) are resistant to molecular weight degradation and discoloration during melt processing of the polymer when the polymer is being extruded and formed into molded articles.
Claims14
A stabilized polymeric molding material comprising:
- a poly(alkylene terephthalate);
- and,
- a stabilizing amount of a neutral ester of phosphorous acid with at least one oxetane group.
In a poly(alkylene terephthalate) based polymer capable of being thermoplastically molded, the improvement comprising:
- a stabilizing amount of a neutral ester of phosphorous acid with at least one oxetane group being in admixture with said poly(alkylene terephthalate) polymer.
Dependencies are inferred from the claim text.