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Reversible thermochromic material and application thereof

A color-changing material and heat-sensitive technology, applied in color-changing fluorescent materials, applications, household appliances, etc., can solve the problems of high color-changing range, short service life, and high price, and achieve clear high-temperature areas, simple temperature measurement, and high cost performance Effect

Active Publication Date: 2015-04-29
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disclosed temperature-indicating materials have one or several serious defects and deficiencies in terms of color change range, color change degree, stability, service life, toxicity, cost, etc.
For example: European patent 88-201996 uses liquid crystal materials, which are expensive; the temperature-indicating material disclosed in Japanese Patent-1-225689 is toxic; Chinese patent CN1086246A discloses a high-temperature-resistant temperature-indicating material, but does not have reversibility; A reversible thermochromatic temperature display material and its manufacturing method, but the color change range is relatively high, and the temperature cannot be displayed within 120°C; Chinese patent CN1618631A suggests a sticker technology that changes color with temperature, which can reversibly change color, but one is monotonous and only Two colors, the second is easy to fade, the service life is short, and the third is not environmentally friendly

Method used

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  • Reversible thermochromic material and application thereof
  • Reversible thermochromic material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Prepare the heat-sensitive reversible color material according to the above formula, and dry it into powder.

[0032] 2. Preparation of heat-sensitive reversible color water-based ink.

[0033] Take 15% heat-sensitive reversible color material powder, 30% water-based acrylic resin, 1% surfactant Tween 61, 10% polyol, 0.5% anti-ultraviolet agent Tinuvin 1130, 0.2 % Bactericidal preservative G1, 0.1% defoamer DF-58, and 0.01% pH adjustment stabilizer AMP-95, the balance is deionized water, stir and disperse at room temperature to mix evenly, and then filter through 100 stainless steel The heat-sensitive reversible color water-based ink is obtained by sieve filtration. During the preparation process, it cannot be heated to the temperature at which the color disappears, and the pH needs to be strictly controlled between 6.0 and 7.0.

[0034] The heat-sensitive reversible water-based ink was frozen at -25°C for 48 hours.

[0035] 3. Prepare thermal and reversible color temperat...

Embodiment 2

[0038] 1. Prepare heat-sensitive reversible color material color paste, and freeze the color paste at -25°C for 24 hours and then thaw it for use.

[0039] 2. Preparation of thermal reversible color water-based ink.

[0040] Take 40% by weight of thawed thermal reversible color material slurry, 20% water-based acrylic resin, 3% surfactant Span 80, 15% polyol, 1% anti-ultraviolet agent Tinuvin 292, 0.4% germicidal preservative G2, 0.2% defoamer Defom W-090, and 0.05% pH adjustment stabilizer AMP-95, the balance is deionized water, stir and disperse and mix well at room temperature, then The heat-sensitive reversible color water-based ink is filtered through 100 stainless steel filter sieve. During the preparation process, it cannot be heated to the temperature at which the color disappears, and the pH needs to be strictly controlled between 6.0 and 7.0.

[0041] 3. Prepare thermal and reversible color temperature indicator stickers.

[0042] The heat-sensitive reversible color water-...

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Abstract

The invention discloses reversible thermochromic material and application thereof. The reversible thermochromic material is made of granules with the diameter of 0.5 micrometers to 15 micrometers and polymerized and wrapped with cross-linked resin, and the granules contain, by weight, 3-5% of leuco material, 6-9% of color developing agent and 85-91% of modifier. The reversible thermochromic material is applicable to the preparation of reversible thermochromic water-based ink and reversible thermochromic temperature indicator stickers. The ink comprises, by weight, 5-50% of the reversible thermochromic material, 10-40% of water-based acrylic resin, 0.5-5% of surfactant, 5-30% of polyhydric alcohol, 0.1-1% of uvioresistant agent, 0.1-0.5% of bactericidal preservative, 0.05-0.5% of defoamer, PH regulating stabilizer, and the balance of deionized water. The reversible thermochromic material is flexible in color changing, stable in performance, visual, handy, nontoxic and environment-friendly, and provides clear temperature indication areas.

Description

Technical field [0001] The invention relates to a thermally sensitive reversible color functional material and its application in the field of temperature display and measurement, in particular to a thermally sensitive reversible color material and its use. Background technique [0002] As we all know, temperature indicator materials are functional materials that indicate temperature and temperature changes and distribution by color changes. They are convenient and simple to use, and are especially suitable for occasions where general temperature measurement tools cannot or are difficult to measure, such as high-pressure equipment parts, continuous running parts, It is also suitable for temperature measurement of flying objects, dangerous and inaccessible areas of the human body. It is also suitable for some temperature measurements that do not need to be very accurate, but need to know the temperature range, especially for safety warning occasions, such as abnormal heating of hou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02C09D11/50C09D11/107G01K11/16
Inventor 邵开宏杨学良
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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