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Sheet-shaped reflective heat-insulating powder and preparation method thereof

A reflective thermal insulation powder, flake technology, applied in chemical instruments and methods, reflective/signal coatings, fibrous fillers, etc., can solve problems such as high maintenance costs, poor decorability, and impact on aesthetics, and achieve strong decorability. , improve the thermal insulation performance, the effect of low cost

Active Publication Date: 2018-06-26
ZHEJIANG COLORAY TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the thermal barrier type heat insulation filler mainly includes hollow glass microspheres, hollow ceramic microspheres, etc. This type of heat insulation filler is used in architectural coatings, and cracks often appear in the coating after construction, which seriously affects the appearance, and its maintenance cost is high.
Another kind of heat-reflecting heat-insulating filler is mainly some metal materials such as nano-titanium oxide, nano-zinc oxide, antimony-doped tin oxide, etc. This kind of heat-insulating filler has high transmittance in visible light and high reflection in the infrared region. rate, but its decoration is poor and the amount of addition is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of flake reflective heat insulation powder, comprising the following steps:

[0025] A. Surface sensitization: Under the state of stirring, place the glass flakes in the hydrochloric acid mixture solution dissolved with stannous chloride for surface sensitization. The sensitization temperature is 10°C, and the surface sensitization time is 40 minutes. Slowly add hydrogen peroxide dropwise while stirring, and continue stirring for 0.5h after dropping; raise the temperature to 40°C, under the condition of constant temperature stirring, slowly add sodium hydroxide solution dropwise until the solution pH=1.5, adjust the pH and continue stirring for 1.5h , filter and wash until the filtrate is neutral to obtain a filter cake,

[0026] The mass ratio of glass flakes to stannous chloride is 10:1, the thickness of glass flakes is 3 μm, the concentration of sodium hydroxide solution is 0.5mol / L, and the molar ratio of hydrogen peroxide to stannous chloride i...

Embodiment 2

[0031] A preparation method of flake reflective heat insulation powder, comprising the following steps:

[0032] A. Surface sensitization: Under the state of stirring, place the glass flakes in the hydrochloric acid mixture solution dissolved with stannous chloride for surface sensitization. The sensitization temperature is 30°C, and the surface sensitization time is 60 minutes. Slowly add hydrogen peroxide dropwise while stirring, and continue to stir for 2 hours after dropping; raise the temperature to 70°C, and slowly add sodium hydroxide solution dropwise under the condition of constant temperature stirring until the solution pH=2.5, after adjusting the pH, continue stirring for 2 hours, filter , washing until the filtrate is neutral to obtain a filter cake,

[0033] B. Preparation of precursor: add the filter cake in step A to deionized water to redisperse, stir for 30 minutes and heat up to 90°C, adjust the pH value of the slurry to 2.5, and add tetrachloride dropwise at...

Embodiment 3

[0040] A preparation method of flake reflective heat insulation powder, comprising the following steps:

[0041] A. Surface sensitization: Under agitation, place the glass flakes in a mixture of hydrochloric acid dissolved with stannous chloride for surface sensitization. The sensitization temperature is 20°C, and the surface sensitization time is 50 minutes. Slowly add hydrogen peroxide dropwise while stirring, and continue stirring for 1 hour after dropping; raise the temperature to 50°C, and slowly add sodium hydroxide solution dropwise under the condition of constant temperature stirring until the pH of the solution is 2, and continue stirring for 1.5 hours after adjusting the pH. Filter and wash until the filtrate is neutral to obtain a filter cake,

[0042] B. Preparation of precursor: add the filter cake in step A to deionized water to redisperse, stir for 60 minutes and heat up to 80°C, adjust the pH value of the slurry to 1.5, and add tetrachloride dropwise at the sam...

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Abstract

The invention belongs to the technical field of thermal insulation materials, and relates to novel flaky reflective thermal insulation powder and a preparation method thereof. The method comprises the following steps of A, surface sensitization, wherein in a stirring state, glass flakes are placed in hydrochloric acid mixed liquid where stannous chloride is dissolved for surface sensitization, the sensitization temperature ranges from 10 DEG C to 30 DEG C, and the surface sensitization time is longer than 30 min; B, precursor preparation; C, pearlescent pigment preparation; D, finished product preparation. The novel flaky reflective insulation powder has the advantages of being low in cost, high in safety and suitable for industrial large-scale production, facilitating industrial production and the like.

Description

technical field [0001] The invention belongs to the technical field of heat insulation materials, and relates to a flake reflective heat insulation powder and a preparation method thereof. Background technique [0002] At present, energy saving and exploration of new materials are getting more and more attention. Among them, building energy consumption accounts for nearly 30% to 40% of the total energy consumption of human beings, and the energy consumption generated by heating and air conditioning and cooling in people's life accounts for a considerable proportion. The walls are lost. Therefore, improving indoor thermal insulation performance is one of the effective ways to reduce energy consumption. [0003] There are two types of traditional thermal insulation fillers: thermal barrier and thermal reflective. Among them, thermal barrier type heat insulation fillers mainly include hollow glass microspheres, hollow ceramic microspheres, etc. These heat insulation fillers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/33C09D5/36C09C1/28C09C3/06
CPCC09C1/3045C09C3/06C09D5/004C09D5/36
Inventor 卓仲标唐骏
Owner ZHEJIANG COLORAY TECH DEV
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