Nano-engineered inks, methods for their manufacture and their applications

• US 8,263,685 B2
• Filed: 03/17/2011
• Issued: 09/11/2012
• Est. Priority Date: 11/27/2002
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Yadav, Tapesh
• Primary Examiner(s): Jagannathan, Vasu
• Assistant Examiner(s): PAK, HANNAH J
• Application Number:
  US13/050,361
• Publication Number:
  US 20110166289A1
• Time in Patent Office: 544 Days
• Field of Search: 523/201, 523/200, 524/435, 427/127, 427/128, 252/182.33, 428/332
• US Class Current: 523/200
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C01P 2004/64 Nanometer sized, i.e. from 1-100 nanometer
• CPC Class Codes: C01P 2006/22 Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
• CPC Class Codes: C09C 1/3669 Treatment with low-molecular organic compounds
• CPC Class Codes: C09C 1/402 Satin white, modifications thereof, e.g. carbonated or silicated; Calcium sulfoaluminates; Mixtures thereof, e.g. with calcium carbonate or kaolin
• CPC Class Codes: C09C 1/62 Metallic pigments or fillers C09C1/0015 takes precedence
• CPC Class Codes: C09C 3/08 Treatment with low-molecular-weight non-polymer organic compounds C09C3/006, C09C3/048 take precedence
• CPC Class Codes: C09C 3/10 Treatment with macromolecular organic compounds C09C3/006 takes precedence
• CPC Class Codes: C09D 11/03 characterised by features other than the chemical nature of the binder
• CPC Class Codes: C09D 11/037 characterised by the pigment
• CPC Class Codes: Y10S 977/786 Fluidic host/matrix containing nanomaterials
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension

Abstract

Nanoparticle dispersions, inks, pastes, lotions and methods of their manufacture are disclosed. Multifunctional, nanocomposite, hollow nanoparticles, and coated nanoparticle dispersions are also discussed.

Claims

1. A dispersion comprising coated nanoparticles having an average particle size of less than 100 nanometers, wherein the coated nanoparticles comprise a core particle having a density less than 2 gm/cc and a shell that is prepared from a substance having a density greater than 2 gm/cc, wherein the core particle comprises polyacrylates, polyethylene, polypropylene, polyimide, polycarbonate, polystyrene, polytetrafluoroethylene, polyurethane, or polymethyl-methacrylate.

2. The dispersion according to claim 1, wherein the shell comprises a metal.

3. The dispersion according to claim 2, wherein the shell comprises tungsten or copper.

4. The dispersion according to claim 1, wherein the shell comprises a high density ceramic.

5. The dispersion according to claim 4, wherein the shell comprises titania and/or tungsten carbide.

6. The dispersion according to claim 1, wherein the core particle is polymethyl-methacrylate and the shell comprises rutile titania.

7. The dispersion according to claim 6, wherein the average particle size of the rutile titania is 15 nanometers.

8. The dispersion according to claim 1, wherein the coated nanoparticles are low density.

9. The dispersion according to claim 1, wherein the dispersion comprises coated nanoparticles at a loading greater than 10wt. % and a viscosity less than 200 cp.

10. The dispersion according to claim 1, wherein the dispersion is an ink.