thermochromic-material

1. Introduction

The core contents of thermochromic microcapsule are leuco-dye, color developers and temperature controllers. By formulated with different temperature controllers, thermochromic products come in various activation temperatures.

2. Product Description

A. Color Conversion: When the temperature is raised to a specified temperature, it goes from colored to colorless. It returns to the original color as the temperature cools down.

Colored when temperatures raise

Colorless when temperatures cool down

B. Available Activation Temperatures: –15℃ ~ 70℃

C. Color: 15 available colors for each activation temperature. All colors can be mixed with each other or added other pigments.


Red 186C	Rose Red Rose Red 807C2X	Margenta Rubine Red C	Brown 497C	Vermilion 185C	Orange 021C	Yellow 387C	Charm Green Green C

Green 335C	Sky Blue 313C	Turkish Blue 320C	Blue 301U	Dark Blue 294C	Violet 2728C	Black Black5C2X

3. Applications

A. Available Products & Applicability

B. Thermochromic Slurry

a. Product Description

Thermochromic slurry is aqueous dispersion containing microcapsules and 45%(±5%) of solid content. Its average particle size of the slurry is 3-7µm.

b. Properties

Good dispersal in water, suitable for aqueous based screen printing, paint, and ink.

c. Recommended Concentrations

For aqueous based ink/paint 5%~60% w/w(25%)
(For the best result, about 25% concentration is required for 20µm film thickness)

d. General Recommendations

Avoid high polarity solvents, such as, methanol, ethanol, acetone and methyl-ethyl-ketone, which will affect the microcapsules' content through permeation.

Slurry may clump together during storage, which can be heated with a double boiler to disperse.

Changes of PH may cause changes of color conversion.

C. Thermochromic Microcapsulated Powder

a. Product Description

Consist of multiple formulations, containing moisture ≦ 3%. Its average particle size is 3-12µm.

b. Properties

With good solvent resistance and dispersal, thermochromic microcapsulated powder can withstand processing temperatures up to240°C, suitable for ink/paint and plastic injection/extrusion.

c. Recommended Concentrations

For solvent/ aqueous based ink/paint 5%~30% w/w(25%)
(For the best result, about 25% concentration is required for 20µm film thickness)

For plastic injection/extrusion 0.1% ~5% w/w(0.5%)
(For the best result, about 0.5% concentration is required for 0.2cm plastic thickness)

d. General Recommendations

Avoid high polarity solvents, such as methanol, ethanol, acetone and methyl ethyl ketone, which will affect the microcapsules' content through permeation.

The processing temperature of injection molding should not be over 240℃.

D. Thermochromic Masterbatch

a. Product Description

NCC thermochromic masterbatch contains 12%-18% of microcapsules depending on the different color formulations.

b. Properties

Dispersed and used easily, can be directly applied to plastic injection/extrusion.

c. Recommended Concentrations

For plastic injection/extrusion 1% ~5% w/w(0.5%)
(For the best result, about 0.5% concentration is required for 0.2cm plastic thickness)

d. General Recommendations

Standard masterbatch is PE masterbatch. Please check the properties of PE for applications.

Do not add phenol type heat stabilizers only, which may destroy the color changing properties.

UV stabilizer/absorbent may affect the color changing properties.

4. Miscellaneous

A. IT&DT chart

Chart of color change to temperatures: Exp. 31℃ Red.

When temperatures is going up to 26.5℃, red color begins fading. The color completely disappears at 33℃.

When temperatures is going down to 27.5℃, red color begins appearing. The color strongest at 22℃.

Please note each color has its specific activation temperatures. The heat conduction speed of base materials does affect the thermochromic products' reactions to temperatures.

B. Multi-Phase Color Change

a. Two-phase Color Change

b. Three-phase Color Change

c. Multi-phase Color Change

5. Others

A. Storage: Keep sealed in a dark, cool place, away from direct sunlight. Best within two years.

B. Certifications: EN-71 & RoHS passed. Safe for food grade packing and toys.

New Prismatic Enterprise CO., LTD.