Granted Patent B2

US 8,916,065 · App. 14/053,489 · Granted Dec 23, 2014

Abstract

Claims (46)

1. A polymer stabilizing composition, comprising:

(i) a first component comprising one or more phosphite antioxidants,

wherein said one or more phosphite antioxidants comprise one or more solid tris(monoalkylaryl)phosphites, wherein the one or more solid tris(monoalkylaryl)phosphites is present in the composition at 100 wt % with respect to the total amount of alkylaryl phosphite present in the composition; and

(ii) a second component comprising an alkanolamine,

wherein the polymer stabilizing composition is a solid at 25° C.

2. The composition according to claim 1 , wherein

(a) the one or more phosphite antioxidants comprise one or more tris(phenyl)phosphite antioxidants alkylated at the ortho- or para-position relative to the phenoxy-phosphorus bond of tris(4-monoalkylphenyl)phosphite of formula (I):

wherein each R is independently selected from C 1 to C 5 straight or branched chain alkyl;

(b) the alkanolamine comprises one or more amines of formula (II):

wherein x is from 1 to 3; R 1 is selected from the group consisting of hydrogen, and straight or branched C 1 -C 6 alkyl, and R 2 is selected from the group consisting of straight or branched C 1 -C 30 alkyl, wherein the amine is present in an amount of from 0.01 to 5 wt % based on the total weight of phosphite antioxidants, and

the composition comprising (a) and (b) is a solid at 25° C.

3. The composition according to claim 2 , wherein R is selected from the group consisting of methyl, ethyl, propyl, 2-methylpropyl and 2,2-dimethylpropyl.

4. The composition according to claim 2 , wherein the at least one tris(4-monoalkylaryl)phosphite of formula (I) is selected from the group consisting of tris(4-t-butylphenyl)phosphate and tris(4-t-amylphenyl)phosphite.

5. The composition according to claim 2 , wherein in the amine (b) each R 1 is independently selected from the group consisting of hydrogen, straight or branched C 1 -C 3 alkyl and R 2 is a straight or branched C 8 -C 20 alkyl group.

6. The composition according to claim 5 wherein the amine is selected from the group consisting of triethanolamine, tripropanolamine, triisopropanolamine, octyl-bis(2-ethanol)amine, nonyl-bis(2-ethanol)amine, decyl-bis(2-ethanol)amine, undecyl-bis(2-ethanol)amine, dodecyl-bis(2-ethanol)amine, tridecyl-bis(2-ethanol)amine, tetradecyl-bis(2-ethanol)amine, pentadecyl-bis(2-ethanol)amine, hexadecyl-bis(2-ethanol)amine, heptadecyl-bis(2-ethanol)amine, octadecyl-bis(2-ethanol)amine, octyl-bis(2-propanol)amine, nonyl-bis(2-propanol)amine, decyl-bis(2-propanol)amine, undecyl-bis(2-propanol)amine, dodecyl-bis(2-propanol)amine, tridecyl-bis(2-propanol)amine, tetradecyl-bis(2-propanol)amine, pentadecyl-bis(2-propanol)amine, hexadecyl-bis(2-propanol)amine, heptadecyl-bis(2-propanol)amine, octadecyl-bis(2-propanol)amine, and isomers thereof.

7. The composition according to claim 6 wherein the amine (b) is selected from the group consisting of triethanolamine, tripropanolamine, triisopropanolamine,

8. The composition according to claim 2 , wherein the amine is present in an amount of from 0.1 to 3 wt % based on the total weight of phosphate antioxidants.

9. The composition of claim 1 , further comprising a polymer blended with or otherwise incorporating said polymer stabilizing composition, thereby generating a stabilized polymeric composition.

10. The composition of claim 9 , wherein the stabilized polymeric composition comprises from 0.01 to 10% of the polymer stabilizing composition.

11. The composition of claim 9 , wherein the at least one tris(monoalkylaryl)phosphite is selected from the group consisting of tris(4-t-butylphenyl)phosphite and tris(4-t-amylphenyl)phosphite,

wherein the alkanolamine is selected from the group consisting of triethanolamine, tripropanolamine and triisopropanolamine, and

wherein the alkanolamine is present in an amount of from 0.5 to 1.5 wt % based on the total weight of phosphite antioxidants present in the composition.

12. The composition of claim 9 , wherein the polymer comprises a homopolymer, co-polymer, plastomer, elastomer or blend comprising any two or more thereof.

13. A polymer stabilizing composition, comprising:

(i) a first component comprising at least one phosphite antioxidant,

wherein said at least one phosphite antioxidant comprises solid tris(monoalkylaryl)phosphite,

wherein the solid tris(monoalkylaryl)phosphite is present in the composition 100 wt % with respect to the total amount of alkylaryl phosphite present in the composition; and

(ii) a second component comprising an alkanolamine,

wherein the alkanolamine is present in an amount of from 0.1 to 3 wt % based on the total weight of the at least one phosphite antioxidant, and

wherein the polymer stabilizing composition is a solid at 25° C.

14. The polymer stabilizing composition according to claim 13 , wherein the solid tris(monoalkylaryl)phosphite comprises a tris(4-monoalkylphenyl)phosphite of formula (I):

wherein each R is independently selected from C 1 to C 5 straight or branched chain alkyl.

15. The polymer stabilizing composition according to claim 14 ,

further comprising a polymer of a type selected from the group consisting of homopolymers, co-polymers, plastomers, elastomers, and a blend comprising any two or more thereof, and

wherein the polymer is stabilized and exhibits improvements in one or more of melt flow index, yellowness index, and gas fade properties, as compared to a polymer in the absence of the polymer stabilizing composition.

16. A polymer stabilizing composition, comprising:

(i) a first component comprising at least one phosphite antioxidant,

wherein said at least one phosphite antioxidant comprises one or more tris(4-monoalkylphenyl)phosphite of formula (I):

wherein each R is independently selected from C 1 to C 5 straight or branched chain alkyl,

wherein the one or more tris(4-monoalkylphenyl)phosphate of formula (I) is present in the composition at 100 wt % with respect to the total amount of alkylaryl phosphate present in the composition; and

(ii) a second component comprising an alkanolamine,

wherein the alkanolamine is selected from the group consisting of triethanolamine, tripropanolamine and triisopropanolamine, and

wherein the polymer stabilizing composition is a solid at 25° C.

17. The polymer stabilizing composition of claim 16 , wherein the tris(4-monoalkylphenyl)phosphite is solid, and wherein each R in formula (I) is the same.

18. The polymer stabilizing composition of claim 16 , wherein the alkanolamine is triisopropanolamine.

19. The polymer stabilizing composition of claim 16 , wherein the tris(4-monoalkylphenyl)phosphite comprises one or more of tris(4-t-butylphenyl)phosphite and tris(4-t-amylphenyl)phosphite.

Assignments (11)