IP Library › Granted Patent US 6,846,870
Granted Patent B2
US 6,846,870 · App. 10/044,360 · Granted Jan 25, 2005

Hydrotalcites, syntheses, and uses

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,846,870
App. No.
10/044,360
Granted
Jan 25, 2005
Kind
B2
Abstract

Synthetic hydrotalcites of the general formula [M 2+ 1-x M 3+ x (OH) 2 ] x+ [A n− x/n ·mH 2 O] x− where M 2+ is a divalent cation, M 3+ is a trivalent cation and A n− is an organic anion selected from straight chain carboxylates of C 16 -C 18 acids, carboxylates of aromatic acids, carboxylates of acrylic acid, unsaturated carboxylates of methacrylic acid, unsaturated carboxylates of vinylacetic acid and C 2 and higher organic acids containing heteroatoms such as nitrogen, phosphorous, sulfur and halogens are disclosed, along with methods of synthesis and uses.

Claims (32)

1. A synthetic hydrotalcite of the general formula:

[M 2+ 1-x M 3+ x (OH) 2 ] x+ [A n− x/n ·mH 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 carboxylate of an amino-acid.

2. The synthetic hydrotalcite of claim 1 , wherein said divalent cation source, M 2+ consists essentially of Mg 2+ .

3. The synthetic hydrotalcite of claim 1 , wherein said trivalent cation source, M 3+ consists essentially of Al 3+ .

4. The synthetic hydrotalcite of claim 1 , wherein said amino acid comprises 4-aminobutyric acid.

5. The synthetic hydrotalcite of claim 1 wherein said amino acid comprises 6-aminocaproic acid.

6. The synthetic hydrotalcite of claim 1 , wherein said hydrotalcite is capable of self exfoliation.

7. The synthetic hydrotalcite of claim 6 , wherein said hydrotalcite is capable of reversible exfoliation.

8. The synthetic hydrotalcite of claim 1 , wherein said hydrotalcite is capable of reversible exfoliation.

9. The synthetic hydrotalcite of claim 1 , wherein said divalent cation, M 2+ comprises Mg 2+ and up to 50% of at least one divalent cation selected from Ni 2+ , Co 2+ , Zn 2+ , Cu 2+ and Mn 2+ .

10. The synthetic hydrotalcite of claim 1 , wherein said trivalent cation, M 3 + comprises a mixture of Al 3+ and up to 50% of at least one trivalent cation selected from Cr 3+ and Fe 3+ .

11. A synthetic hydrotalcite-poly-addition polymer blend comprising:

at least one poly-addition polymer; and

a synthetic hydrotalcite of the general formula;

[M 2+ 1-x M 3+ x (OH) 2 ] x+ [A n− x/n ·mH 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 carboxylate of an amino-acid.

12. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said divalent cation, M 2+ consists essentially of Mg 2+ .

13. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said trivalent cation, M 3+ consists essentially of Al 3+ .

14. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said at least one poly-addition polymer is selected from the group consisting of polypropylene, polyethylene, polybutene-1, poly-4-methyl pentene-1, polyvinyl chloride and polystyrene.

15. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said at least one poly-addition polymer comprises a maleated polyolefin.

16. The synthetic hydrotalcite-poly-addition polymer blend of claim 15 , wherein said maleated polyolefin comprises maleated polypropylene.

17. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said amino acid comprises 4-aminobtyric acid.

18. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said amino acid comprises 6-aminocaproic acid.

19. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said at least one polymer comprises a maleated polyolefin.

20. The synthetic hydrotalcite-poly-addition polymer blend of claim 19 , wherein said maleated polyolefin bonds with said amino acid in the form of an amide.

21. The synthetic hydrotalcite-poly-addition polymer blend of claim 19 , wherein said maleated polyolefin bonds with said amino acid in the form of an imide.

22. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said hydrotalcite is capable of self exfoliation.

23. The synthetic hydrotalcite-poly-addition polymer blend of claim 22 , wherein said hydrotalcite is capable of reversible exfoliation.

24. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said hydrotalcite is capable of reversible exfoliation.

25. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said divalent cation, M 2+ contains Mg 2+ and up to 50% of at least one divalent cation selected from Ni 2+ , Co 2+ , Zn 2+ , Cu 2+ and Mn 2+ .

26. The synthetic hydrotalcite-poly-addition polymer blend of claim 11 , wherein said trivalent cation, M 3+ contains Al 3+− and up to 50% of at least one trivalent cation selected from Cr 3+ and Fe 3+ .