Thermochromic coatings, films and materials for thermal management

Patent metadata

Field	Value
Publication number	US-10125272-B2
Application number	US-201615094135-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 8, 2015
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

Thermochromic coatings, films and materials that aid in a) reducing surface temperature of a structure or composite material when environmental temperature is relatively high and b) increasing surface temperature under relatively low environmental temperature. Surface temperature modulation is achieved using a synergistic combination of thermochromic materials and light scattering components.

First claim

What is claimed is:

1. A thermochromic material-containing composition, comprising:
a thermochromic material comprising a leuco dye, a developer and a solvent encapsulated in a shell, wherein the encapsulation comprises trioctanoin, wherein the thermochromic material is present in an amount from 0.1 part to about 6 parts based on 100 total parts by weight of the composition;
a light scattering component, wherein the light scattering component is present in an amount from about 1 to about 10 parts based on 100 total parts by weight of the composition; and
a matrix material, comprising an asphalt binder, wherein the thermochromic material has a transition temperature that ranges from about 25° C. to about 35° C., wherein the composition is a) a coating, b) a film, or c) further includes asphalt, and wherein the thermochromic material and the light scattering material are both dispersed within the matrix material.

2. The composition according to claim 1 , wherein light scattering component includes one or more of titanium dioxide, ceramic particles, metal oxide particles and glass particles.

3. The composition according to claim 1 , wherein the matrix material further comprises a polymer.

4. The composition according to claim 3 , wherein the polymer is one or more of polyvinylchloride, polyurethane, acrylic, polyolefin, polycarbonate, polyacrylonitrile, polyvinylpyrrolidone, polystyrene, and polyvinyl alcohol.

5. The composition according to claim 1 , wherein the transition temperature is from about 29° C. to about 33° C.

6. The composition according to claim 1 , wherein the thermochromic material is microencapsulated.

Assignees

• Univ Case Western Reserve

Inventors

• Yu Xiong
• Hu Jianying

Classifications

• C09D5/26 Primary

  Thermosensitive paints · CPC title

• C08K3/40

  Glass · CPC title

• C08K2003/2241

  Titanium dioxide · CPC title