Exterior paint formulation

• US 20060030656A1
• Filed: 08/09/2004
• Published: 02/09/2006
• Est. Priority Date: 08/09/2004
• Status: Active Grant

• Current Assignee: BEHR Process Corporation (Masco Corporation)
• Original Assignee: BEHR Process Corporation (Masco Corporation)
• Inventors: Pham, Anh, Nguyen, Kim L., Maxey, Sidney, Shah, Deven, Alexander, Anil, Brownell, Stan, Tarng, Ming-Ren, Pham, Annie, Minamyer, Mark, Pham, My Linh
• Granted Patent: US 7,642,309 B2
• Time in Patent Office: Days
• US Class Current: 524/430
• CPC Class Codes: B05D 7/14 to metal, e.g. car bodies involving a chemical reaction between the metal and the coating C23
• CPC Class Codes: B05D 7/52 Two layers
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C09D 5/00 Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced electrically insulating plastics, resins or waxes H01B3/30; Filling pastes
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: C09D 7/67 Particle size smaller than 100 nm

Abstract

The present invention provides increased stain resistance, tannin blocking, adhesion, and various other properties. A composition in accordance with the principles of the present invention comprises at least two binders, nanoparticle pigment, and pigmentary titanium dioxide. In one embodiment, the present invention relates to a coating on a substrate wherein the coating has two binders, nanoparticle metal oxide pigment, and pigmentary titanium dioxide. Various additives may be included to formulate paint as known in the art.

Claims

1. A paint composition comprising:

a first acrylic primer binder of about 450 pounds per 100 gallons to about 630 pounds per 100 gallons;

a second acrylic topcoat binder of about 50 pounds per 100 gallons to about 95 pounds per 100 gallons; and

a nanoparticle-sized metal oxide pigment of about 2 pounds per 100 gallons to about 20 pounds per 100 gallons,

wherein the paint composition has a PVC of about 4 to about 55 and a pigment binder ratio of about 0.10 to about 3.0.

2. The composition of claim 1, wherein the nanoparticle metal oxide pigment comprises zinc oxide.

3. The composition of claim 1, wherein the nanoparticle metal oxide pigment comprises particles having an average particle size of less than about 100 nanometers.

4. The composition of claim 3, wherein the nanoparticle metal oxide pigment comprises particles having an average particle size of between about 30 nanometers and about 65 nanometers.

5. The composition of claim 1, wherein the first acrylic primer binder consists essentially of acrylic.

6. The composition of claim 1, wherein the second acrylic topcoat binder consists essentially of acrylic.

7. The composition of claim 1, wherein the first acrylic primer binder comprises self-crosslinking polymer.

8. The composition of claim 1, wherein the first acrylic binder comprises a 100% acrylic binder intended for use as a primer vehicle.

9. The composition of claim 1, wherein the ratio of the first primer binder to the second topcoat binder is about 80:

20.

10. The composition of claim 1 further comprising a third binder.

11. The composition of claim 1, wherein the ratio of the first binder to the second binder is about 80:

20.

17. The composition of claim 10, wherein the step of adding the second topcoat acrylic binder includes adding a 100% acrylic binder.

18. The composition of claim 10, wherein the first acrylic primer binder comprises a self-crosslinking polymer.

19. The composition of claim 10, wherein the first acrylic binder comprises a 100% acrylic binder.

20. The composition of claim 1, wherein the ratio of the first binder to the second binder is about 80:

20.

12. A process for producing a paint composition comprising the steps of:

dispersing a pigmentary-sized pigment in a solvent to form a dispersion;

mixing the dispersion with grind additives;

adding a first acrylic primer binder and a second topcoat acrylic binder to the dispersion; and

adding letdown additives to the dispersion, wherein the resulting composition includes a PVC of about 4 to about 55 and a percentage of solid by weight of between about 30 and about 55.

13. The process of claim 12, wherein the nanoparticle metal oxide pigment comprises zinc oxide.

14. The process of claim 12, wherein the nanoparticle metal oxide pigment comprises particles having an average particle size of less than 100 nanometers.

15. The process of claim 12, wherein the nanoparticle metal oxide pigment comprises particles having an average particle size of between about 30 nanometers and about 65 nanometers.

16. The process of claim 12, wherein the step of adding the first acrylic primer binder includes adding a 100% acrylic binder.

21. A coated substrate comprising:

a substrate; and

a coating on the substrate having;

a first binder and a second binder;

a pigmentary-sized pigment; and

a nanoparticle-sized pigment.

22. The coated substrate of claim 21, wherein the nanoparticle metal oxide pigment comprises zinc oxide.

23. The coated substrate of claim 21, wherein the nanoparticle metal oxide pigment comprises particles having an average particle size of less than 100 nanometers.

24. The coated substrate of claim 21, wherein the nanoparticle metal oxide pigment comprises particles having an average particle size of between about 30 nanometers and about 65 nanometers.

25. The coated substrate of claim 21, wherein the first acrylic primer binder is 100% acrylic.

26. The coated substrate of claim 21, wherein the second acrylic topcoat binder is 100% acrylic.

27. The coated substrate of claim 21, wherein the first acrylic binder comprises a self-crosslinking polymer.

28. The coated substrate of claim 21, wherein the first acrylic binder comprises a 100% acrylic binder intended for use as a primer vehicle.

29. The coated substrate of claim 21, wherein the ratio of the first binder to the second binder is about 80:

20.

30. The coated substrate of claim 21 further comprising a third binder.

35. The paint of claim 29, wherein at least one of the first acrylic binder and second acrylic binder is 100% acrylic.

36. The paint of claim 29, wherein the first acrylic binder comprises a self-crosslinking polymer.

37. The paint of claim 29, wherein the ratio of the first binder to the second binder is about 80:

20.

31. A paint comprising:

a first binder comprised of 100% acrylic primer binder;

a second binder; and

a nanoscale metal oxide.

32. The paint of claim 31, wherein the nanoscale metal oxide pigment comprises zinc oxide.

33. The paint of claim 31, wherein the nanoscale metal oxide pigment comprises particles having an average particle size of less than 100 nanometers.

34. The paint of claim 33, wherein the nanoparticle metal oxide pigment comprises particles having an average particle size of between about 30 nanometers and about 65 nanometers.