IP Library › Granted Patent US 12,264,263
Granted Patent B2
US 12,264,263 · App. 17/372,031 · Granted Apr 1, 2025

Composite coatings containing phase change materials

Inventors: Matthew Aguayo (Chandler, AZ); Aashay Arora (Tempe, AZ); Narayanan Neithalath (Chandler, AZ)
Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
C09D5/26C09D5/028C09D7/70C09D133/00C09K5/063G01N25/18
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Quick Facts
Patent No.
US 12,264,263
App. No.
17/372,031
Granted
Apr 1, 2025
Kind
B2
Abstract

Methods and formulations for use of phase change materials (PCMs) as coatings or integrated with building materials are disclosed. A formulation comprises an amount of phase change material, for example a mass fraction of about 0.01 to about 0.50. The PCM materials may be applied as a surface treatment such as paint, for example in order to provide improved thermal regulation to a building or a portion thereof.

Claims (17)

1. A formulation for phase change material (PCM)-composite coating, the formulation comprising:

an amount of acrylic latex-based paint having a mass fraction range of about 0.25 to about 0.60, wherein the acrylic latex-based paint comprises a binder comprising polymer solids, a filler, a pigment, and a first amount of water;

microencapsulated PCM having a PCM-to-paint mass ratio of between 0.01 to 0.4, wherein the microencapsulated PCM comprises an organic PCM powder contained within spherical polymer microcapsules, and the organic PCM powder has a median particle size of between 10 μm and 100 μm and a phase transition temperature of between about 24 degrees Celsius and about 40 degrees Celsius; and

the formulation further comprises a second amount of water in the acrylic latex-based paint and the microencapsulated PCM so that a mass fraction of a total amount of water including the first amount of water and the second amount of water is between about 0.1 and about 0.75.

2. The formulation of claim 1 , wherein the microencapsulated PCMs comprise a cake.

3. The formulation of claim 1 , wherein the microencapsulated PCMs comprise a slurry.

4. The formulation of claim 1 , wherein the organic PCM powder is configured to have a phase transition temperature of about 24 degrees Celsius.

5. The formulation of claim 1 , wherein the organic PCM powder is configured to have a phase transition temperature of about 35 degrees Celsius.

6. The formulation of claim 4 , wherein the median particle size is about 20 μm.

7. The formulation of claim 5 , wherein the median particle size is about 50 μm.

8. The formulation of claim 1 , wherein the formulation comprises a total polymer solids mass fraction of 0.44 and a total water mass fraction of 0.56, and wherein the formulation achieves a similar consistency as traditional latex-based paint.

9. The formulation of claim 8 , wherein the microcapsules of the microencapsulated PCM are spherical in shape without agglomerations.

10. The formulation of claim 9 , wherein the formulation is configured with a thermal energy storage capability of about 284 kilojoules per square meter.

11. The formulation of claim 1 , wherein the mass fraction of the total amount of water is between 0.40-0.75.

12. The formulation of claim 11 , wherein an initial mass fraction of the polymer solids of the amount of acrylic latex-based paint is about 0.41 and an initial mass fraction of the first amount of water is about 0.59.

13. The formulation of claim 12 , wherein the PCM-to-paint mass ratio is about 0.33.

14. The formulation of claim 13 , wherein the second amount of water comprises a mass fraction of about 0.28 so that a total mass fraction of the polymer solids is 0.44 and the total water mass fraction is 0.56.

Assignments (3)
CONFIRMATORY LICENSE Recorded May 21, 2024
From: ARIZONA STATE UNIVERSITY-TEMPE CAMPUS
To: NATIONAL SCIENCE FOUNDATION
Reel/Frame 067472/0153 →
CONFIRMATORY LICENSE Recorded Jan 22, 2024
From: ARIZONA STATE UNIVERSITY-TEMPE CAMPUS
To: NATIONAL SCIENCE FOUNDATION
Reel/Frame 066358/0555 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 9, 2021
From: AGUAYO, MATTHEW; ARORA, AASHAY; NEITHALATH, NARAYANAN
To: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
Reel/Frame 056807/0283 →
Continuity (3)
Continuation PCTUS2020013141 · Jan 10, 2020
Provisional Application 62791299 · Jan 11, 2019
Related Publication 20210340387A1 · Nov 4, 2021
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