Stabilized thermoplastic polyesterurethanes
AssigneeMobay Chemical Corporation
InventorsHerbert L. Heiss, Robert P. Yeater, Russell P. Carter, Jr.
Life of this patent
Estimating the term…
Abstract
The instant invention is directed to novel color and hydrolytically stable thermoplastic polyester urethanes. The invention broadly consists of adding 2-oxazolidones to the components of the polyurethane, or to the polyurethane itself.
Claims13
[1. A polyesterurethane stabilized against hydrolysis and/or processing discoloration by having incorporated therein a stabilizing amount of a 2-oxazolidone.]
[2. The stabilized polyesterurethane of claim 1 wherein the 2-oxazolidone has the formula ##STR8## wherein R represents hydrogen or an organic radical which is free of epoxide reactable groups,
- X.sub.1 and X.sub.2 may be the same or different and represent hydrogen or organic radicals which are free of epoxide reactable groups, and
- n represents an integer of from 1 to 3.]
[3. The stabilized polyesterurethane of claim 2 wherein R, X.sub.1 and X.sub.2 may be the same or different and represent a hydrogen atom or a radical selected from the group consisting of alkyl and cycloalkyl of from 1 to 12 carbon atoms and aryl, aralkyl and alkaryl of from 6 to 15 carbon atoms.]
[4. The stabilized polyesterurethane of claim 3 wherein X.sub.1 and X.sub.2 represent hydrogen.]
[5. The stabilized polyesterurethane of claim 4 wherein n=1.]
[6. The stabilized polyesterurethane of claim 5 wherein R is selected from the group consisting of hydrogen, ##STR9##
[7. The stabilized polyesterurethane of claim 4 wherein n=2.]
[8. The stabilized polyesterurethane of claim 7 wherein R is selected from the group consisting of ##STR10##
[9. The stabilized polyesterurethane of claim 1 wherein the 2-oxazolidone is present in an amount of from 0.02 to 6 percent by weight
- based on the weight of the polyesterurethane.]
A polyesterurethane stabilized against hydrolysis and/or processing discoloration by the addition of a stabilizing amount of a 2-oxazolidone-based compound of the formula:
- ##STR11## wherein R represents hydrogen or an organic radical which is free of epoxide reactable groups and n represents an integer of from 1 to 3.
Dependencies are inferred from the claim text.