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Heat-insulating powder for coating and preparation method thereof

A technology of thermal insulation powder and coating, applied in reflective/signal coatings, chemical instruments and methods, polyurea/polyurethane coatings, etc. Excellent thermal insulation effect, good thermal insulation effect

Inactive Publication Date: 2010-12-15
SHANGHAI YUTANG INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned reflective heat-insulating coating can prevent the heat radiation of the sun, it is still glass beads, which still cannot avoid the "frame effect" caused by glass beads, that is, cracks will appear in the coating shortly after its construction, and it cannot be repaired, and the cost is also low. high
[0004] At present, although there are many reports on heat-reflective heat-insulating coatings, there are few reports on new materials for heat-reflective heat-insulating powder alone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Select 1000g of titanium dioxide, 200g of vanadium pentoxide and 300g of rectorite powder with a particle size of 20-50nm, and mix them in a mixer for 1-3 hours to obtain a mixed nano-powder material;

[0030] 2) Select the sodium silicate (i.e. sodium silicate aqueous solution) with a Baume degree of 48-53 (containing sodium silicate 25-32wt%), add deionized water 5 times the weight of sodium silicate to dilute, and then Under high-speed stirring at 8000 rpm, add the mixed nano-powder material with a weight of 12% of the diluted natron, and stir for 10 to 30 minutes;

[0031] 3) Add hydrochloric acid dropwise (obtained by adding concentrated hydrochloric acid to 1 times the volume of water to dilute), the molar ratio of the hydrogen ion contained in the hydrochloric acid to the sodium silicate contained in the above-mentioned sodium silicate is 1: 1; Complete within 60 minutes, continue to stir for 30 minutes, then add hydrochloric acid dropwise to pH 7-7.2, and the...

Embodiment 2

[0036] 1) Select 1000g of titanium dioxide with a particle size of 20nm, 150g of vanadium pentoxide of 20nm, 50g of aluminum oxide of 40nm, and 400g of rectorite powder, and mix them in a mixer for 1 to 3 hours to obtain a mixed nano-powder material;

[0037] 2) Choose sodium silicate (i.e. sodium silicate aqueous solution) with a Baume degree of 42-50 (containing sodium silicate 20-29wt%), add deionized water 5 times the weight of sodium silicate to dilute, Under high-speed stirring at 6000 rev / min, add the mixed nano-powder material with 10% weight of diluted natron, and stir for 10 to 30 minutes;

[0038] 3) Add hydrochloric acid dropwise (obtained by adding 2 times the volume of water to dilute concentrated hydrochloric acid), the molar ratio of the hydrogen ion contained in the hydrochloric acid to the sodium silicate contained in the above-mentioned sodium silicate is 1: 1; Complete within 60 minutes, continue to stir for 30 minutes, then add hydrochloric acid dropwise t...

Embodiment 3

[0043] 1) Select 1000g of titanium dioxide, 150g of vanadium pentoxide, 50g of ferric oxide, and 400g of rectorite powder with a particle size below 50nm, and mix them in a mixer for 1 to 3 hours to obtain a mixed nano-powder material;

[0044] 2) Select the sodium silicate (aqueous solution of sodium silicate) with a Baume degree of 42-53 (containing sodium silicate 20-32wt%), add deionized water 5 times the weight of sodium silicate to dilute, Under high-speed stirring at 4000 rev / min, add the mixed nano-powder material with 12% weight of diluted natron, and stir for 10 to 30 minutes;

[0045] 3) Add hydrochloric acid dropwise (obtained by adding concentrated hydrochloric acid to 1 times the volume of water to dilute), the molar ratio of the hydrogen ion contained in the hydrochloric acid to the sodium silicate contained in the above-mentioned sodium silicate is 1: 1; Complete within 60 minutes, continue to stir for 30 minutes, then add hydrochloric acid dropwise to pH 7-7.2...

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Abstract

The invention relates to heat-insulating powder for a heat-insulating coating in aspects of buildings, oil tanks, oil tubes and the like and a preparation method thereof. The heat-insulating powder is prepared by coating nano-titanium oxide, vanadium oxide, ferric oxide, rectorite powder and the like serving as a heat-insulating material with new nano-silicon oxide generated by reaction of sodiumsilicate and hydrochloric acid or sulfuric acid. The heat-insulating powder has the heat-insulating function of reflecting infrared rays and ultraviolet rays in sunlight, and the heat-insulating powder provided by the invention is a brand new heat-insulating material on the heat-insulating principle. In the heat-insulating powder, the nano-heat-insulating material is coated by the new nano-silicon oxide to enhance the heat-insulating effect of nanometer materials, avoid the agglomeration phenomenon and reduce the cost. In addition, the prepared heat-insulating material also has the multiple functions of rust prevention, corrosion prevention, sound insulation and the like.

Description

technical field [0001] The invention relates to a heat-insulating powder for architectural coatings and a preparation method thereof, in particular to a heat-reflecting heat-insulating powder specially used in architectural coatings and a preparation method thereof. Background technique [0002] Building heat-reflective heat-insulating coatings have become a research hotspot of building energy-saving materials due to their excellent heat insulation function. With the vigorous promotion of building thermal insulation coatings, the development of economical, convenient and good thermal insulation coatings for building reflective thermal insulation coatings has great practical significance for social energy conservation. [0003] Heat-reflective heat-insulating coatings achieve heat-insulating effects by blocking solar heat and reflecting infrared light and heat. There are many research reports on heat-reflective heat-insulating coatings, and the main component of heat-reflect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C1/42C09C1/00C09C1/40C09C1/24C09C3/06C09D5/33C09D133/00C09D175/04
Inventor 李家权
Owner SHANGHAI YUTANG INDAL
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