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Low-temperature reversible chromotropic pigment and preparation method thereof, temperature-sensitive pavement marking coating and preparation method and application thereof

A color-changing pigment and low-temperature technology, which can be used in heat-sensitive paints, road signs, roads, etc., can solve problems such as safety hazards and easy freezing, and achieve the effects of avoiding safety hazards, stable performance, and sensitive color change

Active Publication Date: 2018-01-30
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In winter, some dark and humid places, under overpasses and tunnel openings are prone to freezing, which brings a lot of inconvenience and danger to travellers.
[0003] At present, there are many safety tips and driving skills about snow travel, but there are still many safety hazards that cannot be detected in real time and reported in time to remind drivers of icy road conditions.

Method used

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  • Low-temperature reversible chromotropic pigment and preparation method thereof, temperature-sensitive pavement marking coating and preparation method and application thereof
  • Low-temperature reversible chromotropic pigment and preparation method thereof, temperature-sensitive pavement marking coating and preparation method and application thereof
  • Low-temperature reversible chromotropic pigment and preparation method thereof, temperature-sensitive pavement marking coating and preparation method and application thereof

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preparation example Construction

[0033] The preparation method of the low-temperature reversible discoloration paint of the present invention comprises the following steps:

[0034] 1) Preparation of low temperature reversible color pigments.

[0035] (1) Weigh crystal violet lactone (recessive body), 4-methoxyphenol (color developer) and dimethyl carbonate (adjusting agent). After heating and melting the dimethyl carbonate in the flask, add crystal violet lactone and 4-methoxyphenol, and slowly raise the temperature to 60°C-70°C. Thoroughly stir and keep warm for 1-1.5 hours, and naturally cool to 40-50°C to obtain a low-temperature reversible discoloration compound solution.

[0036] (2) A certain amount of emulsifier sodium dodecylbenzene sulfonate is added into water, and after it is completely dissolved, an emulsifier solution with a mass concentration of 0.1g / ml-0.3g / ml is obtained. Mix the emulsifier solution, the low-temperature reversible discoloration compound solution prepared in step (1) and wa...

Embodiment 1

[0052] The preparation method of the low-temperature reversible discoloration paint of the present invention comprises the following steps:

[0053] 1) Preparation of low temperature reversible color pigments.

[0054] The low-temperature reversible color pigment is a microcapsule coated with a melamine resin prepolymer with a particle size of 0.5 μm to 15 μm. The microcapsule contains crystal violet lactone, 4-methoxyphenol and dimethyl carbonate. The low-temperature reversible discoloration compound composed of esters has a mass ratio of 1:3:30; the mass ratio of the low-temperature reversible discoloration compound to the melamine resin prepolymer is 1:1.

[0055] (1) Weigh crystal violet lactone (recessive body), 4-methoxyphenol (color developer) and dimethyl carbonate (regulator) in a ratio of 1:3:30. After heating and melting the dimethyl carbonate in the flask, add crystal violet lactone and 4-methoxyphenol, and slowly raise the temperature to 70°C. Thoroughly stir an...

Embodiment 2

[0069] The preparation method of the low-temperature reversible discoloration paint of the present invention comprises the following steps:

[0070] 1) Preparation of low temperature reversible color pigments.

[0071] The low-temperature reversible color pigment is a microcapsule coated with a melamine resin prepolymer with a particle size of 0.5 μm to 15 μm. The microcapsule contains crystal violet lactone, 4-methoxyphenol and dimethyl carbonate. The low-temperature reversible discoloration compound composed of esters has a mass ratio of 1:4:45; the mass ratio of the low-temperature reversible discoloration compound to the melamine resin prepolymer is 1:1.5.

[0072] (1) Weigh crystal violet lactone (recessive agent), 4-methoxyphenol (color developer) and dimethyl carbonate (regulator) in a ratio of 1:4:45. After heating and melting the dimethyl carbonate in the flask, add crystal violet lactone and 4-methoxyphenol, and slowly raise the temperature to 60°C. Thoroughly stir...

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Abstract

The invention relates to low-temperature reversible chromotropic pigment and a preparation method of the low-temperature reversible chromotropic pigment, a temperature-sensitive pavement marking coating and a preparation method and application of the temperature-sensitive pavement marking coating. The preparation method of the low-temperature reversible chromotropic pigment comprises the followingsteps: firstly, uniformly mixing a hidden body, a chromogenic agent and a regulator, heating, carrying out heat preservation and then naturally cooling to obtain a low-temperature reversible chromotropic compound solution; adjusting the pH value to be 3 to 6 after emulsifying the low-temperature reversible chromotropic compound solution, rising the temperature after adding a resin prepolymer solution, cooling to the temperature of 30 to 40 DEG C after stopping the reaction, adding a dispersant I to be uniformly dispersed, carrying out suction filtration, washing and drying to obtain the low-temperature reversible chromotropic pigment; the temperature-sensitive pavement marking coating is prepared from the low-temperature reversible chromotropic pigment and a filler, a dispersant II, a wetting agent, acrylic emulsion, a film-forming additive and the like, and can be used for preparing temperature-sensitive pavement marks. The low-temperature reversible chromotropic pigment prepared bythe invention can produce color reversible changes when the temperature changes, and the temperature-sensitive pavement marks are prepared, thereby being capable of reminding a user of icy pavements timely to reduce traffic accidents.

Description

technical field [0001] The invention relates to the technical field of road traffic, in particular to a low-temperature reversible discoloration pigment and a preparation method thereof, a temperature-sensing road surface marking paint, a preparation method and application thereof. Background technique [0002] The coefficient of adhesion on snowy roads in winter is very low, the wheels are easy to slip, and driving is very dangerous. According to the survey, the coefficient of friction of icy pavement is only a quarter of that of dry asphalt pavement. In winter, some dark and humid places, under overpasses and tunnel openings, etc. are prone to freezing, which brings a lot of inconvenience and danger to travellers. [0003] At present, there are many safety tips and driving skills about snow travel, but there are still many safety hazards that cannot be detected in real time and reported in time to remind drivers of icy road conditions. Contents of the invention [0004...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D5/26C09D7/61E01F9/40E01F9/518
Inventor 申爱琴蒙洁郭寅川李鹏宋攀魏自玉陈祥
Owner CHANGAN UNIV
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