Hydrotalcites, syntheses, and uses

1. A synthetic hydrotalcite of the general formula:

[M 2+ 1−x M 3+ x (OH) 2 ] x+ [A n− x/n .m H 2 O] x−

wherein M 2+ is a divalent cation, M 3+ is a trivalent cation and A n− is at least one organic anion comprising a vinylacetate,

said synthetic hydrotalicite being produced by reacting said trivalent cation, M 3+ with said at least one organic anion, A n− to produce an intermediate, and

reacting said intermediate with said divalent cation, M 2+ in water to produce said synthetic hydrotalcite.

2. The synthetic hydrotalcite of the general formula:

[M 2+ 1−x M 3+ x (OH) 2 ] x+ [A n− x/n .m H 2 O] x−

wherein M 2+ is a divalent cation, M 3+ is a trivalent cation and A n− is an anion comprising a mixture of at least two members selected from the group consisting of straight chain saturated carboxylates of C 2 -C 4 acids, straight chain saturated carboxylates of C 5 -C 18 acids, carboxylates of aromatic acids, unsaturated carboxylates of acrylic acid, unsaturated carboxylates of methacrylate acid and unsaturated carboxylates of vinylacetic acid,

said synthetic hydrotalicite being produced by reacting said trivalent cation, M 3+ with said anion, A n− to produce an intermediate, and

reacting said intermediate with said divalent cation, M 2+ in water to produce said synthetic hydrotalcite.

3. The synthetic hydrotalcite of claim 2 , wherein said organic anion, A n− is a mixture of an acetate, a hexanoate and a stearate.

4. The synthetic hydrotalcite of claim 3 , wherein the molar ratio of said mixture is about 1.34 acetate:0.6 hexanoate:0.8 stearate.

5. The synthetic hydrotalcite of claim 2 , wherein said organic anion, A n− is a mixture of an acrylate, an acetate and a stearate.

6. The synthetic hydrotalcite of claim 5 , wherein the molar ratio of said mixture is about 3.76 acrylate:1.14 acetate:0.57 stearate.

7. The synthetic hydrotalcite of claim 2 , wherein said divalent cation, M 2+ comprises Mg 2+ and up to 50% of at least one divalent cation selected from the group consisting of: Ni 2+ , Co 2+ , Zn 2+ , Cu2+ and Mn 2+ .

8. The synthetic hydrotalcite of claim 2 , wherein said trivalent cation, M 3+ comprises Al 3+ and up to 50% of at least one trivalent cation selected from the group consisting of: Al 3+ , Cr 3+ , and Fe 3+ .

9. A synthetic hydrotalcite-polyolefin blend comprising:

a polyolefin; and

a synthetic hydrotalcite of the general formula:

[M 2+ 1−x M 3+ x (OH) 2 ] x+ [A n− x/n .m H 2 O] x−

wherein M 2+ is a divalent cation, M 3+ is a trivalent cation and A n− is an organic anion source comprising a mixture of at least two selected from the group consisiting of: straight chain carboxylates of C 5 -C 18 acids, carboxylates of aromatic acids, carboxylates of acrylic acid, unsaturated carboxylates of methacrylic acid and unsaturated carboxylates of vinylacetic acid,

said synthetic hydrotalcite being produced by reacting said trivalent cation, M 3+ with said anion, A n− to produce an intermediate, and

reacting said intermediate with said divalent cation, M 2+ in water to produce said synthetic hydrotalcite.

10. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said organic anion, A n− is a mixture of an acetate, a hexanoate and a stearate.

11. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein the molar ratio of said mixture is about 1.34 acetate:0.6 hexanoate:0.8 stearate.

12. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said organic anion, A n− is a mixture of an acrylate, an acetate and a stearate.

13. The synthetic hydrotalcite-polyolefin blend of claim 12 , wherein the molar ratio of said mixture is about 3.76 acrylate:1.14 acetate:0.57 stearate.

14. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said polyolefin is polypropylene.

15. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said polyolefin is polyethylene.

16. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said polyolefin is polybutylene.

17. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said polyolefin is polymethyl pentane.

18. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said divalent cation, M 2+ contains Mg 2+ and up to 50% of at least one divalent cation selected from the group consisting of: Ni 2+ , Co 2+ , Zn 2+ , Cu 2+ and Mn 2+ .

19. The synthetic hydrotalcite-polyolefin blend of claim 9 , wherein said trivalent cation, M 3+ contains Al 3+− and up to 50% of at least one trivalent cation selected from the group consisting of: Cr 3+ and Fe 3+ .

20. A synthetic hydrotalcite-polystyrene blend comprising:

a polystyrene; and

a synthetic hydrotalcite of the general formula:

[M 2+ 1−x M 3 + x (OH) 2 ] x+[ A n− x/n .m H 2 O] x−

wherein M 2+ is a divalent cation, M 3+ is a trivalent cation and A n− is an organic anion source comprising a mixture of at least two members selected from the group consisting of: straight chain carboxylates of C 5 -C 18 acids, carboxylates of aromatic acids, carboxylates of acrylic acid, unsaturated carboxylates of methacrylic acid and unsaturated carboxylates of vinylacetic acid,

said synthetic hydrotalcite being produced by reacting said trivalent cation, M 3+ with said anion, A n− to produce an intermediate, and

reacting said intermediate with said divalent cation, M 2+ in water to produce said synthetic hydrotalcite.

21. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein said divalent cation, M 2+ consists essentially of Mg 2+ .

22. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein said trivalent cation, M 3+ consists essentially of Al 3+ .

23. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein said organic anion, A n− is selected from the group consisting of hexanoates, octanoates, decanoates, stearates, benzoates, chlorobenzoates, naphthoates, p-hydroxybenzoates, acrylates, methacrylates and vinylacetates.

24. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein said organic anion, A n− is a mixture of an acetate, a hexanoate and a stearate.

25. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein the molar ratio of said mixture is about 1.34 acetate: 0.6 hexanoate 0.8 stearate.

26. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein said organic anion, A n− is a mixture of an acrylate, an acetate and a stearate.

27. The synthetic hydrotalcite-polystyrene blend of claim 26 , wherein the molar ratio of said mixture is about 3.76 acrylate: 1.14 acetate: 0.57 stearate.

28. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein said divalent cation, M 2+ contains Mg 2+ and up to 50% of at least one divalent cation selected from the group consisting of: Ni 2+ , Co 2+ , Zn 2+ , Cu 2+ and Mn 2+ .

29. The synthetic hydrotalcite-polystyrene blend of claim 20 , wherein said trivalent cation, M 3+ contains Al 3+ and up to 50% of at least one trivalent cation selected from the group consisting of: Cr 3+ and Fe 3+ .

30. A synthetic hydrotalcite-polyvinyichioride blend comprising:

a polyvinylchloride; and

a synthetic hydrotalcite of the general formula:

[M 2+ 1−x M 3+ x (OH) 2 ] x+ [A n− x/n .m H 2 O] x−

wherein M 2+ is a divalent cation, M 3+ is a trivalent cation and A n− is an organic anion source comprising a mixture of at least two members selected from the group consisting of: straight chain carboxylates of C 5 -C 18 acids, carboxylates of aromatic acids, carboxylates of acrylic acid, unsaturated carboxylates of methacrylic acid and unsaturated carboxylates of vinylacetic acid,

said synthetic hydrotalcite being produced by reacting said trivalent cation, M 3+ with said anion, A n− to produce an intermediate, and

reacting said intermediate with said divalent cation, M 2+ in water to produce said synthetic hydrotalcite.

31. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein said divalent cation, M 2+ consists essentially of Mg 2+ .

32. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein said trivalent cation, M 3+ consists essentially of Al 3+ .

33. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein said organic anion, A n− is selected from the group consisting of hexanoates, octanoates, decanoates, stearates, benzoates, chlorobenzoates, naphthoates, p-hydroxybenzoates, acrylates, methacrylates and vinylacetates.

34. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein said organic anion, A n− is a mixture of an acetate, a hexanoate and a stearate.

35. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein the molar ratio of said mixture is about 1.34 acetate: 0.6 hexanoate: 0.8 stearate.

36. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein said organic anion, A n− is a mixture of an acrylate, an acetate and a stearate.

37. The synthetic hydrotalcite-polyvinylchloride blend of claim 36 , wherein the molar ratio of said mixture is about 3.76 acrylate: 1.14 acetate: 0.57 stearate.

38. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein said divalent cation, M 2+ contains Mg 2+ and up to 50% of at least one divalent cation selected from the group consisting of: Ni 2+ , Co 2+ , Zn 2+ , Cu 2+ and Mn 2+ .

39. The synthetic hydrotalcite-polyvinylchloride blend of claim 30 , wherein said trivalent cation, M 3+ contains Al 3+− and up to 50% of at least one trivalent cation selected from the group consisting of: Cr 3+ and Fe 3+ .