Solar heat responsive exterior surface covering

Patent metadata

Field	Value
Publication number	US-10053865-B2
Application number	US-201414524475-A
Country	US
Kind code	B2
Filing date	Oct 27, 2014
Priority date	Jul 7, 2006
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

An exterior surface covering has a colored outer layer that transmits infrared radiation and an inner layer with a thermochromic pigment that absorbs heat at low temperature and reflects at high temperatures. The outer layer conceals the color change of the thermochromic pigment.

First claim

The invention claimed is:

1. An exterior surface covering comprising:
(a) an outer layer having a transmission coefficient of at least 50 percent for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers; and
(b) an inner layer having a reflectance for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers, the reflectance being dependent on a variable parameter, the reflectance varying by a factor of at least 0.5 as the parameter is varied over a predetermined range.

2. An exterior surface covering according to claim 1 wherein the reflectance increases with an increase in the parameter over the predetermined range of the parameter.

3. An exterior surface covering according to claim 1 wherein the outer layer is colored.

4. An exterior surface covering according to claim 1 wherein the variable parameter is temperature.

5. An exterior surface covering according to claim 4 wherein the inner layer comprises at least one thermochromic substance selected from the group consisting of thermochromatic colorants, thermochromatic polymers, composite thermochromatic pigments, chromogenic thermotropic gels, vanadium oxides, polythiophene polymers, liquid crystals, spirobenzopyrans, spironaphthoxazines, chromenes, fulgides, and diarylethenes.

6. An exterior surface covering according to claim 4 wherein the reflectance varies from less than 0.2 to greater than 0.25 when the temperature varies from less than 20 degrees C. to greater than 30 degrees C.

7. A building siding product including an exterior surface covering comprising:
(a) an outer layer having a transmission coefficient of at least 50 percent for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers; and
(b) an inner layer having a reflectance for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers, the reflectance being dependent on a variable parameter, the reflectance varying by a factor of at least 0.5 as the parameter is varied over a predetermined range.

8. A building siding product according to claim 7 wherein the reflectance increases with an increase in the parameter over the predetermined range of the parameter.

9. A building siding product according to claim 7 wherein the outer layer is colored.

10. A building siding product according to claim 7 wherein the variable parameter is temperature.

11. A building siding product according to claim 10 wherein the inner layer comprises at least one thermochromic substance selected from the group consisting of thermochromatic colorants, thermochromatic polymers, composite thermochromatic pigments, chromogenic thermotropic gels, vanadium oxides, polythiophene polymers, liquid crystals, spirobenzopyrans, spironaphthoxazines, chromenes, fulgides, and diarylethenes.

12. A building siding product according to claim 10 wherein the reflectance varies from less than 0.2 to greater than 0.25 when the temperature varies from less than 20 degrees C. to greater than 30 degrees C.

13. A building siding product according to claim 7 wherein the building siding product is a polymeric building siding product.

14. A building siding product according to claim 13 wherein the polymeric building siding product is made of polyvinyl chloride.

15. A building siding product according to claim 13 wherein the polymeric building siding product is made of polypropylene.

16. A building product including an exterior surface covering comprising:
(a) an outer layer having a transmission coefficient of at least 50 percent for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers; and
(b) an inner layer having a reflectance for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers, the reflectance being dependent on a variable parameter, the reflectance varying by a factor of at least 0.5 as the parameter is varied over a predetermined range.

17. A building product according to claim 16 wherein the reflectance increases with an increase in the parameter over the predetermined range of the parameter.

18. A building product according to claim 16 wherein the outer layer is colored.

19. A building product according to claim 16 wherein the variable parameter is temperature.

20. A building product according to claim 16 wherein the inner layer comprises at least one thermochromic substance selected from the group consisting of thermochromatic colorants, thermochromatic polymers, composite thermochromatic pigments, chromogenic thermotropic gels, vanadium oxides, polythiophene polymers, liquid crystals, spirobenzopyrans, spironaphthoxazines, chromenes, fulgides, and diarylethenes.

Assignees

• Certain Teed Corp

Inventors

• Kalkanoglu Husnu M
• Shiao Ming Liang
• Hong Keith C
• Jacobs Gregory F

Classifications

• Y10T428/31678

  Of metal · CPC title

• E04D5/10 Primary

  by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen · CPC title

• Y10T428/24372

  Particulate matter · CPC title

• B44F1/10

  Changing, amusing, or secret pictures · CPC title

• C09D5/26

  Thermosensitive paints · CPC title