ENERGY SAVING PAINT

• US 20110017097A1
• Filed: 09/30/2008
• Published: 01/27/2011
• Est. Priority Date: 10/04/2007
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Ruckebusch, Jean-Marie
• Application Number:
  US12/681,518
• Publication Number:
  US 20110017097A1
• Time in Patent Office: Days
• US Class Current: 106/286.3
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C09D 5/004 Reflecting paints; Signal paints
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: C09D 7/69 Particle size larger than 1000 nm

Abstract

A paint composition comprising white alumina, in particular white corundum, more particularly white fused corundum having a median particle size of at least 5.5 micrometers.

Claims

1. A paint composition comprising white alumina having a median particle size of at least 5.5 micrometers.

5. A composition according to claim 1, wherein the white alumina has a median particle size of at most 80 micrometers.

8. A composition according to claim 1, wherein the concentration of white alumina is at most 90 weight percent based on total solid content.

11. A composition according to claim 1, wherein the concentration of white alumina is at least 35 weight percent based on total solid content.

15. A composition according to claim 1, wherein the white alumina is white corundum.

16. A composition according to claim 15, wherein the white corundum is essentially free or free of chromium oxide, manganese oxide and titanium dioxide.

17. A composition according to claim 15, wherein the white corundum is of a purity corresponding to at least 95 wt % Al₂O₃.

18. A composition according to claim 17, wherein the white corundum is of a purity corresponding to at least 95 wt % Al₂O₃;

at most 2 wt % Na₂O;

at most 2 wt % SiO₂;

at most 0.5 wt % Fe₂O₃; and

at most 0.4 wt % collectively CaO and MgO.

23. A composition according to claim 15, wherein the white corundum is essentially free or free of antimony oxide, bismuth oxide, boron oxide, cobalt oxide, gallium oxide, indium oxide, lanthanum oxide, lithium oxide, molybdenum oxide, neodymium oxide, nickel oxide, niobium oxide, tin oxide, vanadium oxide and zinc oxide.

24. A composition according to claim 15, wherein the white corundum is white fused corundum.

25. A composition according to claim 1, wherein the composition further comprises a white pigment selected from the group consisting of zinc sulfide, lithopone, zinc oxide, zirconium (IV) oxide, bismuth oxychloride, white lead, and mixtures thereof.

26. A composition according to claim 25, wherein the white pigment is zinc sulfide.

34. A composition according to claim 1, wherein the composition further comprises at least one colored pigment.

35. A composition according to claim 34, wherein said at least one colored pigment is colored metal oxide pigment.

36. A composition according to claim 34, wherein said at least colored pigment is an infrared reflective colored pigment.

39. A composition according to claim 1 further comprising a binder, wherein the binder is a resin selected from the group consisting of acrylic resins, styrene-acrylic copolymers, styrene-(meth)acrylic acid copolymers, ethylene-vinylacetate copolymers and mixtures thereof.

40. A composition according to claim 39, wherein the binder is an acrylic resin or a mixture of acrylic resins.

46. A composition according to claim 1, wherein the composition is substantially free or free of elemental metal and metal alloy particulates.

47. A composition according to claim 1, wherein the composition is substantially free of titanium dioxide.

50. A composition according to claim 1, wherein the composition is provided in a form of a concentrate suitable for dispersion in a vehicle, the vehicle being selected from the group consisting of water, a water-based liquid and a organic-based liquid.

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