PHOTOCHROMIC MATERIAL Change color with UVA radiation.  THERMOCHROMIC MATERIAL Change color with temperature.  FRAGRANCE MICROCAPSULE MATERIAL Long lasting microcapsules release fragrance longer than six months.  LONG LASTING GLOW IN THE DARK MATERIAL Store light and heat from conventional sources, and glow in the dark.  INVISIBLE FLUORESCENT MATERIAL It is white or invisible under conventional visible light and appears colorful fluorescence under UV/IR light.

1. Introduction

The core contents of thermochromic microcapsule are leuco-dye, color developers and temperature controllers. The color of Memory Type Thermochromic Pigments will start to disappear when temperature reaches 30℃, however, unlike the normal thermochromic pigment, the color will appear again when temperature turns back to 8℃. This wide activated and de-activated temperature range makes the color having the character of memory.

2. Product Description

A. Color Conversion:

When the temperature is raised to a specified temperature, it goes from colored to colorless. The product returns to the original color as the temperature cools down.

Colorless as temperatures cool down Colored as temperatures raise
B. Available Activation Temperatures:

Color starts to disappear at 42℃, and the color will appear again when temperature is below 0℃.

C. Colors:

5 available colors. Red, Yellow, Blue, Purple, and Orange. All colors can be mixed with each other or added other pigments.

Red
Orange
Yellow
 
Blue
Purple
 

3. Applications

A. Available Products & Applicability
B. Thermochromic Slurry

a. Product Description

Thermochromic slurry is microencapsulated aqueous dispersion with good dispersal in water, suitable for water based ink, paint. It contains 75%(±5%) of solid content. The average particle size of the slurry is 3-10µm.

b. Properties

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

c. Recommended Concentrations

For aqueous based ink/paint      5%~60% w/w

(For best results, 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 contents through permeation.

Slurry may clump together during storage. Heating the slurry to 45℃ in a double boiler to disperse.

Changes of PH may cause changes of color conversion.

C. Thermochromic microencapsulated powder

a. Product Description

Consist of compound formulation, containing moisture ≦ 3%. Its average particle size is 7-10µm.

b. Properties

With good solvent resistance and dispersal, thermochromic microencapsulated powder is suitable for ink/paint and plastic injection/extrusion.

c. Recommended Concentrations

For solvent/ aqueous based ink/paint      5%~30% w/w

(For best results, about 25% concentration is required for 20µm film thickness)

For plastic injection/extrusion      0.1% ~5% w/w

(For best results, 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 contents through permeation.

The processing temperatures of plastic applications should not be over 200℃.

4. Miscellaneous

A. Chart of color change to temperatures : Exp. Purple color

When temperature is going up to 30℃, Purple color begins fading. The color completely disappears at 40℃.

When temperature is going down to -7.8℃, red color begins appearing. The color is strongest at 5.5℃.

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

5. Others

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

B. Expiratory date: One Year

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

Update version date:20170908

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