Purification formaldehyde inner wall water-resisting putty

A technology for water-resistant putty and interior walls, applied in the direction of filling slurry, etc., can solve the problem that the effect of photon excitation cannot be observed, and achieve the effect of high strength, avoiding easy agglomeration and good workability

Inactive Publication Date: 2019-03-01
上海伟星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, photogenerated holes [Hole+] are formed in the valence band of the material, and photogenerated electrons [e~] are formed in the conduction band. In the bulk titanium dioxide, because the titanium dioxide particles are very large, the photogenerated electrons are very slow in the process of reaching the conduction band and starting to move to the particle surface. It is easy to recombine with photogenerated holes, so we cannot observe the effect of photon excitation macroscopically
However, due to the small size of nano-titanium dioxide particles, electrons are easier to diffuse to the crystal surface, resulting in two micro-regions with opposite polarities in two different parts of the originally uncharged crystal surface-photogenerated electrons and photogenerated holes.

Method used

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  • Purification formaldehyde inner wall water-resisting putty

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The formula of formaldehyde-removing putty for interior walls is as follows in parts by weight:

[0028] 150 parts of 42.5 white cement

[0029] 325 mesh heavy calcium 217 parts

[0030] 500 mesh heavy calcium 600 parts

[0031] Available in disperse rubber powder 5 parts

[0032] Cellulose ether 5 parts

[0033] 3 parts starch ether

[0034] Nano titanium dioxide 10 parts

[0035] Molecular sieve 10 parts

[0036] The cellulose ether is methyl B-grade hydroxyethyl cellulose ether, and the nano-titanium dioxide used is anatase type, with a specific surface area of ​​70-120m 2 , the average particle size is 20±5nm, and the molecular sieve particle size is 150 mesh.

[0037] The preparation method of purifying formaldehyde interior wall water-resistant putty: its specific steps are:

[0038] The test results of the prepared formaldehyde-free interior wall water-resistant putty are as follows: 100 parts of white cement, 217 parts of 325-mesh heavy calcium, 300 part...

Embodiment 2

[0045] The formula of formaldehyde-removing putty for interior walls is as follows in parts by weight:

[0046]150 parts of 42.5 white cement

[0047] 325 mesh heavy calcium 217 parts

[0048] 500 mesh heavy calcium 600 parts

[0049] Available in disperse rubber powder 5 parts

[0050] Cellulose ether 5 parts

[0051] 3 parts starch ether

[0052] Nano titanium dioxide 10 parts

[0053] Formaldehyde remover 20 parts

[0054] The formaldehyde remover is a molecular sieve compound doped with titanium dioxide;

[0055] The preparation method of the formaldehyde remover: the specific steps are: adding the molecular sieve into the titanyl sulfate aqueous solution and soaking for 120 minutes, after filtering, raising the temperature to 200°C in the air at a heating rate of 5°C / min, and staying there for 1.5 hours, Then in an oxygen-depleted atmosphere, the temperature was raised to 420°C at a rate of 15°C / min, and stayed for 1.5 hours to obtain a molecular sieve loaded with ...

Embodiment 3

[0059] The formula of formaldehyde-removing putty for interior walls is as follows in parts by weight:

[0060] 150 parts of 42.5 white cement

[0061] 325 mesh heavy calcium 217 parts

[0062] 500 mesh heavy calcium 600 parts

[0063] Available in disperse rubber powder 5 parts

[0064] Cellulose ether 5 parts

[0065] 3 parts starch ether

[0066] Nano titanium dioxide 10 parts

[0067] Formaldehyde remover 20 parts

[0068] The formaldehyde remover is a molecular sieve compound doped with titanium dioxide;

[0069] The preparation method of the formaldehyde remover: the specific steps are: adding the molecular sieve into the titanyl sulfate aqueous solution and soaking for 120 minutes, after filtering, raising the temperature to 200°C in the air at a heating rate of 5°C / min, and staying there for 1.5 hours, Then raise the temperature to 420°C at a rate of 15°C / min in an oxygen-poor atmosphere, and stay there for 1.5 hours to obtain a molecular sieve loaded with titan...

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Abstract

The invention relates to purification formaldehyde inner wall water-resisting putty. The purification formaldehyde inner wall water-resisting putty is prepared from the following raw materials in parts by weight: 100 to 200 parts of white cement, 800 parts of heavy calcium, 3 to 6 parts of dispersible rubber powder, 3 to 6 parts of cellulose ether, 3 to 6 parts of starch ether, 5 to 10 parts of nano titanium dioxide, and 5 to 10 parts of molecular sieve. The putty powder has good application property, high strength and good water resistance, and has an absorption and degradation effect for formaldehyde. A porous structure of a molecular sieve contained in the putty powder can absorb the formaldehyde in the air, and can rapidly reduce the content of the formaldehyde in the air, and the contact catalytic effect of the bio-enzyme and the photocatalytic effect of nano titanium dioxide can thoroughly decompose harmful substances such as formaldehyde and TVOC; and by virtue of the absorptionand degradation double effects, the formaldehyde in the air can be rapidly reduced, the formaldehyde pollution can be thoroughly solved, and the purification formaldehyde inner wall water-resisting putty is particularly suitable for the indoor decoration.

Description

technical field [0001] The invention relates to the technical field of water-resistant putty production, in particular to a formaldehyde-purifying water-resistant putty for inner walls. Background technique [0002] The decoration of houses is generally closed construction, the formaldehyde to be released in the furniture is enclosed indoors, and the release time of formaldehyde is relatively long. Despite continuous ventilation, the indoor formaldehyde content cannot be effectively and quickly reduced, and the coating on the furniture is broken. It will continue to release formaldehyde and cause harm to human health. Therefore, there is a need for a method that can quickly adsorb formaldehyde and degrade the adsorbed formaldehyde to achieve the function of removing formaldehyde from the source. [0003] Putty is a part of architectural decoration, leveling the wall surface, and has a large air contact area in house decoration. Add some functional materials to the putty to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/34
CPCC09D5/34
Inventor 郑薇应灵慧赵杨
Owner 上海伟星新材料科技有限公司
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