Compositions and method for making hollow nanoparticles from metal soaps

Patent metadata

Field	Value
Publication number	US-9803060-B2
Application number	US-87833210-A
Country	US
Kind code	B2
Filing date	Oct 4, 2010
Priority date	Sep 10, 2009
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

Compositions and methods for preparing at least partially hollow nanoparticles having an outer shell comprising a one or more molecules and/or residues derived from a metal soap, where the nanoparticles each comprise a continuous inner void space that averages at least 10 percent of the volume of each of the nanoparticles. Such at least partially hollow nanoparticles can be employed in a variety of applications including, but not limited to, tire manufacturing.

First claim

What is claimed is:

1. A composition comprising:
an at least partially hollow nanoparticle having an outer shell comprising one or more molecules and/or residues derived from a metal soap, the metal soap including a metal and a carboxylate group, the outer shell comprising the metal and the carboxylate group;
wherein said at least partially hollow nanoparticle comprises at least one continuous inner void space that constitutes at least 10 percent of the volume of said nanoparticle;
wherein the metal of said metal soap comprises a transition metal, a post-transition metal, a metalloid, a lanthanoid, and/or an actinoid;
wherein the metal of said metal soap has a valence of at least 3.

2. The composition of claim 1 , wherein said composition comprises a plurality of said at least partially hollow nanoparticles, wherein said composition has a density of less than 0.6 g/cm 3 .

3. The composition of claim 1 , wherein said inner void space has an average diameter of at least 1 nm.

4. The composition of claim 1 , wherein said inner void space has an average diameter in the range of from about 2 to about 499 nm.

5. The composition of claim 1 , wherein said outer shell has an average thickness in the range of from about 0.5 to about 40 nm.

6. The composition of claim 1 , wherein said at least partially hollow nanoparticle has an average diameter of 500 nm or less.

7. The composition of claim 1 , wherein at least a portion of said molecules and/or residues derived from a metal soap are cross-linked.

8. The composition of claim 1 , wherein said metal soap has the formula:

wherein M represents the metal of said metal soap and has an oxidation state of +3 or +4, wherein R is any organic moiety having at least one unsaturated C—C bond, wherein n is the valence number of M.

9. The composition of claim 1 , wherein the metal of said metal soap comprises at least one metal selected from the group consisting of Group III (IUPAC Group 13) metals or transition metals excluding zinc, nickel, and copper.

10. The composition of claim 1 , wherein the metal of said metal soap comprises at least one metal selected from the group consisting of aluminum, iron, titanium, and cobalt.

11. The composition of claim 1 , wherein said carboxylate group comprises at least 6 carbon atoms and at least one unsaturated C—C bond.

12. The composition of claim 1 , wherein said carboxylate group comprises oleic acid.

13. The composition of claim 1 , wherein the metal of said metal soap is covalently bonded to said carboxylate group.

14. The composition of claim 1 , wherein said metal soap comprises a di-soap of aluminum.

15. The composition of claim 1 , wherein said metal soap comprises an aluminum di-oleic soap.

16. The composition of claim 1 , wherein said metal soap is not soluble in water.

17. The composition of claim 1 , wherein said metal soap is biocompatible.

18. The composition of claim 1 , further comprising a non-polar solvent within which a plurality of said at least partially hollow nanoparticles are dispersed.

19. A rubber composition comprising: a rubber matrix having dispersed therein a plurality of at least partially hollow nanoparticles having an outer shell comprising one or more molecules and/or residues derived from a metal soap, wherein said at least partially hollow nanoparticles each have at least one continuous inner void space that averages at least 10 percent of the volume of each of said at least partially hollow nanoparticles.

20. The rubber composition of claim 19 , wherein the metal of said metal soap comprises a transition metal, a post-transition metal, a metalloid, a lanthanoid, and/or an actinoid.

21. The rubber composition of claim 19 , wherein said inner void space has an average diameter in the range of from about 2 to about 499 nm.

22. The rubber composition of claim 19 , wherein said outer shell has an average thickness in the range of from about 0.5 to about 40 nm.

23. The rubber composition of claim 19 , wherein said metal soap has the formula:

wherein M represents the metal of said metal soap and has an oxidation state of +3 or +4, wherein R is any organic moiety having at least one unsaturated C—C bond, wherein n is the valence number of M.

24. The rubber composition of claim 19 , wherein the metal of said metal soap comprises at least one metal selected from the group consisting of aluminum, iron, titanium, and cobalt.

25. The rubber composition of claim 19 , wherein said metal soap comprises at least one derivative of a carboxylic acid having at least 6 carbon atoms and at least one unsaturated C—C bond.

26. The rubber composition of claim 25 , wherein said carboxylic acid comprises oleic acid.

27. The rubber composition of claim 25 , wherein the metal of said metal soap is covalently bonded to said derivative of carboxylic acid.

28. The rubber composition of claim 19 , wherein said metal soap comprises an aluminum di-oleic soap.

29. The rubber composition of claim 19 , wherein at least a portion of said molecules and/or residues derived from a metal soap are cross-linked.

30. The rubber composition of claim 19 , wherein said rubber matrix comprises at least one conjugated diene polymer.

31. The rubber composition of claim 19 , wherein said rubber matrix comprises copolymers comprising the residues of conjugated diene monomers and the residues of alkenylbenzene monomers.

32. The rubber composition of claim 19 , wherein said rubber matrix comprises synthetic polyisoprene rubber, styrene-butadiene rubber, styrene-isoprene rubber, styrene-isoprene-butadiene rubber, butadiene-isoprene rubber, polybutadiene, butyl rubber, neoprene, acrylonitrile-butadiene rubber, silicone rubber, fluoroelastomers, ethylene acrylic rubber, ethylene-propylene rubber, ethylene-propylene terpolymer, ethylene vinyl acetate copolymer, epichlorohydrin rubber, chlorinated polyethylene-propylene rubbers, chlorosulfonated polyethylene rubber, hydrogenated nitrile rubber, tetrafluoroethylene-propylene rubber, or mixtures thereof.

33. The rubber composition of claim 19 , wherein said rubber composition comprises said at least partially hollow nanoparticles in a concentration in the range of from about 2 to about 80 weight percent based on the weight of said rubber matrix.

34. A composition comprising:
an at least partially hollow nanoparticle having an outer shell comprising one or more molecules and/or residues derived from a metal soap;
wherein said at least partially hollow nanoparticle comprises at least one continuous inner void space that constitutes at least 10 percent of the volume of said nanoparticle;
wherein the metal of said metal soap comprises a transition metal, a post-transition metal, a metalloid, a lanthanoid, and/or an actinoid;
wherein at least a portion of said molecules and/or residues derived from a metal soap are cross-linked, and the outer shell comprises said crosslinked portion.

35. The composition of claim 34 , wherein the molecules and/or residues derived from a metal soap comprise the metal and a derivat

Assignees

• Wang Xiaorong
• Rackaitis Mindaugas
• Sadhukhan Pat
• Foltz Victor J
• Bridgestone Corp

Inventors

• Wang Xiaorong
• Rackaitis Mindaugas
• Sadhukhan Pat
• Foltz Victor J

Classifications

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title

• C08J2321/00

  Characterised by the use of unspecified rubbers · CPC title

• C08J9/32 Primary

  from compositions containing microballoons, e.g. syntactic foams · CPC title

• C08J9/0071

  Nanosized fillers, i.e. having at least one dimension below 100 nanometers · CPC title