Liquid phosphite blends as stabilizers

1. A composition comprising a phosphite blend, said phosphite blend consisting of at least two different phosphites of the structure

wherein R 1 , R 2 , and R 3 are independently selected alkylated aryl groups of the structure

wherein R 4 , R 5 , and R 6 are independently selected from the group consisting of hydrogen and C 1 -C 6 alkyl, and at least one of R 4 , R 5 , and R 6 in each phosphite is selected from the group consisting of tert-butyl and tert-pentyl,

which blend of phosphites is prepared by reacting a phosphorous trihalide with a mixture of phenols said mixture of phenols comprising a p-alkylated phenol and an o,p-dialkylated phenol

and

wherein said phosphite blend is a liquid at room temperature and atmospheric pressure.

2. The composition of claim 1 wherein said composition comprises a blend of at least three different phosphites of the structure

3. The composition of claim 1 wherein said composition comprises a blend of at least four different phosphites of the structure

4. The composition of claim 1 wherein R 4 , R 5 , and R 6 in each phosphite is selected from the group consisting of hydrogen, tert-butyl and tert-pentyl.

5. The composition of claim 2 wherein R 4 , R 5 , and R 6 in each phosphite is selected from the group consisting of hydrogen, tert-butyl and tert-pentyl.

6. The composition of claim 3 wherein R 4 , R 5 , and R 6 in each phosphite is selected from the group consisting of hydrogen, tert-butyl and tert-pentyl.

7. The composition of claim 1 wherein the phosphites either are independently selected from the group consisting of tris 4-tert-butyl phenyl phosphite, tris 2,4-di-tert-butyl phenyl phosphite, bis(4-tert-butylphenyl)-2,4-di-tert-butylphenyl phosphite, and bis(2,4-di-tert-butylphenyl)-4-tert-butylphenyl phosphite, or are independently selected from the group consisting of tris 4-tert-pentyl phenyl phosphite, tris 2,4-di-tert-pentyl phenyl phosphite, bis(4-tert-pentylphenyl)-2,4-di-tert-pentylphenyl phosphite, and bis(2,4-di-tert-pentylphenyl)-4-tert-pentylphenyl phosphite.

8. The composition of claim 7 wherein said composition comprises a blend of at least three different phosphites either independently selected from the group consisting of tris 4-tert-butyl phenyl phosphite, tris 2,4-di-tert-butyl phenyl phosphite, bis(4-tert-butylphenyl)-2,4-di-tert-butylphenyl phosphite, and bis(2,4-di-tert-butylphenyl)-4-tert-butylphenyl phosphite, or independently selected from the group consisting of tris 4-tert-pentyl phenyl phosphite, tris 2,4-di-tert-pentyl phenyl phosphite, bis(4-tert-pentylphenyl)-2,4-di-tert-pentylphenyl phosphite, and bis(2,4-di-tert-pentylphenyl)-4-tert-pentylphenyl phosphite.

9. The composition of claim 7 wherein said composition comprises a blend of at least four different phosphites either independently selected from the group consisting of tris 4-tert-butyl phenyl phosphite, tris 2,4-di-tert-butyl phenyl phosphite, bis(4-tert-butylphenyl)-2,4-di-tert-butylphenyl phosphite, and bis(2,4-di-tert-butylphenyl)-4-tert-butylphenyl phosphite, or independently selected from the group consisting of tris 4-tert-pentyl phenyl phosphite, tris 2,4-di-tert-pentyl phenyl phosphite, bis(4-tert-pentylphenyI)-2,4di-tert-pentylphenyl phosphite, and bis(2,4-di-tert-pentylphenyl)-4-tert-pentylphenyl phosphite.

10. The composition according to claim 1 further comprising a polymer resin.

11. The composition according to claim 2 further comprising a polymer resin.

12. The composition according to claim 3 further comprising a polymer resin.

13. The composition according to claim 4 further comprising a polymer resin.

14. The composition according to claim 5 further comprising a polymer resin.

15. The composition according to claim 6 further comprising a polymer resin.

16. The composition according to claim 7 further comprising a polymer resin.

17. The composition according to claim 8 further comprising a polymer resin.

18. The composition according to claim 9 further comprising a polymer resin.