Roofing Products Containing Phase Change Materials

• US 20080008858A1
• Filed: 06/27/2007
• Published: 01/10/2008
• Est. Priority Date: 07/08/2006
• Status: Abandoned Application

• Current Assignee: CertainTeed Corp. (Compagnie De Saint-Gobain)
• Original Assignee: CertainTeed Corp. (Compagnie De Saint-Gobain)
• Inventors: Hong, Keith C., Shiao, Ming Liang
• Application Number:
  US11/769,530
• Publication Number:
  US 20080008858A1
• Time in Patent Office: Days
• US Class Current: 428/143
• CPC Class Codes: E04D 1/20 of plastics; of asphalt; of fibrous materials
• CPC Class Codes: E04D 1/22 of specified materials not covered by any one of groups E04D1/14 - E04D1/205, or of combinations of materials, where at least one is not covered by any one of groups E04D1/14 - E04D1/205
• CPC Class Codes: E04D 13/00 Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights ventilation tiles E04D1/30; ventilation slabs E04D3/40; internal channels E04F17/00
• CPC Class Codes: E04D 2001/005 the roofing elements having a granulated surface
• CPC Class Codes: E04D 5/12 specially modified, e.g. perforated, with granulated surface, with attached pads
• CPC Class Codes: F28D 20/023 the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
• CPC Class Codes: Y02E 60/14 Thermal energy storage
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/24372 Particulate matter
• CPC Class Codes: Y10T 428/24405 Polymer or resin [e.g., natural or synthetic rubber, etc.]

Abstract

A solar heat responsive roofing material includes a continuous phase and dispersed discontinuous phase having a phase transition at a temperature between about 50 degrees Celsius and about 95 degrees Celsius.

Claims

1. A solar heat responsive roofing material comprising:

a) a continuous phase; and

b) a discontinuous phase dispersed in the continuous phase, the discontinuous phase having a phase transition at a temperature between about 50 degrees Celsius and about 95 degrees Celsius.

2. Roofing material according to claim 1 wherein the phase transition temperature is between about 60 degrees Celsius and about 85 degrees Celsius.

3. Roofing material according to claim 1 wherein the discontinuous phase has a phase transition enthalpy of at least about 100 kilojoules per kg.

4. Roofing material according to claim 1 wherein the discontinuous phase constitutes at least ten percent by weight of the roofing material.

5. Roofing material according to claim 1 wherein the discontinuous phase comprises a lipophilic substance.

6. Roofing material according to claim 1 wherein the discontinuous phase comprises at least one heat-responsive substance selected from the group consisting of high temperature waxes and thermoplastic polymers.

7. Roofing material according to claim 6 wherein the thermoplastic polymer is selected from the group consisting of poly(vinyl ethyl ether), poly(vinyl n-butyl ether) and polychloroprene.

8. Roofing material according to claim 1 wherein the roof includes a base sheet having a bituminous coating, the continuous phase comprising the bituminous coating.

9. Roofing material according to claim 1 wherein the roof includes a plurality of coated roofing granules, the continuous phase comprising the roofing granule coating.

10. Roofing material according to claim 1 wherein the discontinuous phase is encapsulated in a plurality of capsules.

11. Roofing material according to claim 10 wherein the capsules include a capsule wall, the capsule wall being formed from a material selected from the group consisting of poly(meth)acrylates and polyurethanes.

12. Roofing material according to claim 10 wherein the capsules have an average size ranging from about 1 micrometer to 100 micrometers.

13. Roofing material according to claim 12 wherein the capsules have an average size ranging from about 2 micrometers to 50 micrometers.

14. Roofing material according to claim 1 wherein the discontinuous phase includes a plurality of fibers comprising phase change material.

15. A solar heat-responsive roofing material comprising:

a) a bituminous base sheet; and

b) a plurality of roofing granules, the roofing granules including a latent-heat storage material having a phase transition at a temperature between about 50 degrees Celsius and about 95 degrees Celsius.

16. A solar heat-responsive roofing material according to claim 15 wherein the phase transition temperature is between about 60 degrees Celsius and about 85 degrees Celsius.

17. A solar heat-responsive roofing material according to claim 15 wherein the heat storage material has a phase transition enthalpy of at least 100 kilojoules per kg.

18. A solar heat-responsive roofing material according to claim 15 wherein the heat storage material constitutes at least ten percent by weight of the roofing material.

19. A solar heat-responsive roofing material according to claim 15 wherein the heat storage material is a lipophilic substance.

20. A solar heat-responsive roofing material according to claim 15 wherein the heat storage material is selected from the group consisting of high temperature waxes and thermoplastic polymers.

21. A solar heat-responsive roofing material according to claim 20 wherein the thermoplastic polymer is selected from the group consisting of poly(vinyl ethyl ether), poly(vinyl n-butyl ether) and polychloroprene.

22. A solar heat-responsive roofing material according to claim 15 wherein the heat storage material is encapsulated in a plurality of capsules.

23. A solar heat-responsive roofing material according to claim 22 wherein the capsules include a capsule wall, the capsule wall being formed from a material selected from the group consisting of poly(meth)acrylates and polyurethanes.

24. A solar heat-responsive roofing material according to claim 22 wherein the capsules have an average size ranging from about 0.1 millimeters to 10 millimeters.

25. A solar heat-responsive roofing material according to claim 24 wherein the capsules have an average size ranging from about 0.5 millimeters to 2 millimeters.

26. A solar heat-responsive roofing material according to claim 15 wherein the heat storage material includes a plurality of fibers comprising phase change material.

27. A solar heat-responsive roofing material according to claim 15, further comprising at least one algaecide.

52. A solar heat-responsive roofing material according to claim 27 wherein the at least one algaecide is selected from the group consisting of cuprous oxide, cupric acetate, cupric chloride, cupric nitrate, cupric oxide, cupric sulfate, cupric sulfide, cupric stearate, cupric cyamide, cuprous cyamide, cuprous stannate, cuprous thiocyanate, cupric silicate, cuprous chloride, cupric iodide, cupric bromide, cupric carbonate, cupric fluoroborate, French process zinc oxide, non-French process zinc oxide, zinc sulfide, zinc borate, zinc sulfate, zinc pyrithione, zinc ricinoleate, zinc stearate, zinc chromate, and mixtures thereof.

53. A solar heat-responsive roofing material according to claim 27 wherein the at least one algaecide is selected from copper oxide and zinc oxide.

54. A solar heat-responsive roofing material according to claim 27 wherein the at least one algaecide is cuprous oxide, and the cuprous oxide comprises at least 2 percent of the roofing granules.

55. A solar heat-responsive roofing material according to claim 27 wherein the at least one algaecide is zinc oxide, and the zinc oxide comprises at least 0.1 percent by weight of the roofing granules.

28. A solar heat-responsive roofing material comprising:

a) at least one solar-heat reflective material; and

b) at least one latent-heat storage material, the at least one latent-heat storage material having a phase transition at a temperature between about 50 degrees Celsius and about 95 degrees Celsius.

29. A solar heat-responsive roofing material according to claim 28 wherein the phase transition temperature is between about 60 degrees Celsius and about 85 degrees Celsius.

30. A solar heat-responsive roofing material according to claim 28 wherein the latent-heat storage material has a phase transition enthalpy of at least about 100 kilojoules per kg.

31. A solar heat-responsive roofing material according to claim 28 wherein the latent-heat storage material constitutes at least ten percent by weight of the roofing material.

32. A solar heat-responsive roofing material according to claim 28 wherein the latent-heat storage material is a lipophilic substance.

33. A solar heat-responsive roofing material according to claim 28 wherein the discontinuous phase comprises at least one heat-responsive substance selected from the group comprising high temperature waxes and thermoplastic polymers.

34. A solar heat-responsive roofing material according to claim 31 wherein the thermoplastic polymer is selected from the group consisting of poly(vinyl ethyl ether), poly(vinyl n-butyl ether) and polychloroprene.

35. A solar heat-responsive roofing material according to claim 28 wherein the at least one solar heat reflective roofing material has greater than 40% total reflectance between 700 nm to 2500 nm of solar radiation.

36. A solar heat-responsive roofing material according to claim 28 comprising:

(a) a continuous phase; and

(b) a discontinuous phase dispersed in the continuous phase, the discontinuous phase including the latent-heat storage material.

37. A solar heat-responsive roofing material according to claim 36 wherein the roofing material includes a base sheet having a bituminous coating, the continuous phase comprising the bituminous coating.

38. A solar heat-responsive roofing material according to claim 36 wherein the roofing material includes a plurality of coated roofing granules, the continuous phase comprising the roofing granule coating.

39. A solar heat-responsive roofing material according to claim 36 wherein the discontinuous phase is encapsulated in a plurality of capsules.

40. A solar heat-responsive roofing material according to claim 39 wherein the capsules include a capsule wall, the capsule wall being formed from a material selected from the group consisting of poly(meth)acrylates and polyurethanes.

41. A solar heat-responsive roofing material according to claim 39 wherein the capsules have an average size ranging from about 1 micrometer to 100 micrometers.

42. A solar heat-responsive roofing material according to claim 39 wherein the capsules preferably have an average size ranging from about 2 micrometers to 50 micrometers.

43. A solar heat-responsive roofing material according to claim 28 comprising:

a) a bituminous base sheet; and

b) a plurality of roofing granules, the roofing granules including the latent heat storage material.

44. A solar heat-responsive roofing material according to claim 43 wherein the heat storage material is encapsulated in a plurality of capsules.

45. A solar heat-responsive roofing material according to claim 44 wherein the capsules include a capsule wall, the capsule wall being formed from a material selected from the group consisting of poly(meth)acrylates and polyurethanes.

46. A solar heat-responsive roofing material according to claim 44 wherein the capsules have a size ranging from about 0.1 millimeters to 10 millimeters.

47. A solar heat-responsive roofing material according to claim 44 wherein the capsules have a size ranging from about 0.5 millimeters to 2 millimeters.

48. A solar heat-responsive roofing material according to claim 28 further including a reflective coating, the solar-heat reflective material being dispersed in the reflective coating.

49. A solar heat-responsive roofing material according to claim 48 comprising:

a) a bituminous base sheet; and

b) a plurality of roofing granules, the roofing granules including the latent heat storage material.

50. A solar heat-responsive roofing material according to claim 49 wherein the reflective coating is applied to the bituminous base sheet.

51. A solar heat-responsive roofing material according to claim 49 wherein the reflective coating is applied to the roofing granules.