Lactone stabilizing compositions
AssigneeMilliken & Company
InventorJusong Xia
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Abstract
This invention provides a novel class of compounds and compositions and synthetic methods related to lactone antioxidant 3-arylbenzofuranones. The compounds may be useful to prevent yellowing and deterioration of organic materials preferably polymers, such as polyurethane foams as one example. The lactone antioxidants may be polymeric, and may also be liquid or paste in physical form at room temperature. Although it is not necessary for its stabilizing properties, the compositions may, in some species, bear one or more reactive primary OH groups on the polymer chains. The chains may also contain oligomeric oxyalkylene ether and aliphatic ester functional groups, in one embodiment of the invention.
Claims12
A compound having the structural formula:
- wherein:
- R1-R8 are independently selected from the group consisting of:
- H, F, Cl, Br, I, C1-C20 alkyls, C1-C20 cycloalkyls, C1-C20 alkoxy groups, C7-C20 phenylalkyls, and phenyl groups;
- A comprises a C2-C20 alkyl group or a divalent oligomeric oxyalkylene radical;
- Z comprises a C2-C20 alkyl or a divalent oligomeric ester radical;
- and
- G comprises an end group selected from the group consisting of:
- H, C1-C10 alkyls, alkyl carbonyls and aryl carbonyls.
A compound represented by the formula:
- wherein:
- R1 and R3 are independently selected from the group consisting of:
- H, F, Cl, Br, I, C1-C20 alkyls, C1-C20 cycloalkyls, C1-C20 alkoxy groups, C7-C20 phenylalkyls, and phenyl groups;
- and
- q is a positive integer between 1 and 20, and
- t is a positive integer between 0 and 20, and
- wherein the sum of q+t is equal to or greater than 3.
A compound represented by the formula:
- wherein:
- q is a positive integer between 1 and 20,
- t is a positive integer between 0 and 20, and
- wherein the sum of q+t is equal to or greater than 3.
A compound represented by the structural formula:
A compound represented by the structural formula:
A composition comprising:
- a) an organic material which is subject to oxidative, thermal or light-induced degradation, and
- b) at least one compound of formula:
- wherein:
- R1-R8 are independently selected from the group consisting of:
- H, F, Cl, Br, I, C1-C20 alkyls, C1-C20 cycloalkyls, C1-C20 alkoxy groups, C7-C20 phenylalkyls, and phenyl groups;
- A comprises a C2-C20 alkyl group or a divalent oligomeric oxyalkylene radical;
- Z comprises a C2-C20 alkyl or a divalent oligomeric ester radical;
- and
- G comprises an end group selected from the group consisting of:
- H, C1-C10 alkyls, alkyl carbonyls and aryl carbonyls.
Dependencies are inferred from the claim text.