阅读说明：本技术 一种家具环保漆及其制备方法、喷漆工艺 (Environment-friendly furniture paint, preparation method thereof and paint spraying process ) 是由 汪宏坤 汪宏宇 汪令尧 陈翔 于 2020-06-03 设计创作，主要内容包括：本发明涉及一种家具环保漆,属于家具漆的技术领域,其包括重量份数的以下组分,丙烯酸树脂75-88,水11-22份,颜料4-8份,助剂6-15份,白炭黑2-7份,活性炭2-8份,纳米二氧化钛1-3份,银氨溶液0.5-1.5份；一种家具环保漆的制备方法,将各组分搅拌均匀；一种家具环保漆的喷漆工艺,包括有以下步骤：S1：在打磨后的家具上喷涂家具环保漆2-4次,每次喷涂后进行微波干燥,每干燥至家具表面温度到达50-60度后暂停5-8分钟,然后继续进行微波干燥,微波干燥3-5次后,再进行下次喷涂,喷涂完成后在40-50度下烘干3-6小时,得到初步喷漆的家具；S2：在初步喷漆的家具外部喷涂罩光漆并干燥；本发明具有可以除去甲醛的效果。(The invention relates to an environment-friendly furniture paint, which belongs to the technical field of furniture paints and comprises the following components, by weight, 75-88 parts of acrylic resin, 11-22 parts of water, 4-8 parts of pigment, 6-15 parts of auxiliary agent, 2-7 parts of white carbon black, 2-8 parts of activated carbon, 1-3 parts of nano titanium dioxide and 0.5-1.5 parts of silver ammonia solution; a preparation method of environment-friendly furniture paint comprises the following steps of uniformly stirring all components; a paint spraying process of environment-friendly furniture paint comprises the following steps: s1: spraying furniture environment-friendly paint on the polished furniture for 2-4 times, performing microwave drying after each spraying, pausing for 5-8 minutes after each drying till the surface temperature of the furniture reaches 50-60 ℃, then continuing to perform microwave drying, performing next spraying after the microwave drying is performed for 3-5 times, and drying for 3-6 hours at 40-50 ℃ after the spraying is finished to obtain the furniture subjected to preliminary spraying paint; s2: spraying finishing paint outside the primarily painted furniture and drying; the invention has the effect of removing formaldehyde.)

1. The environment-friendly furniture paint is characterized in that: the paint comprises, by weight, 75-88 parts of acrylic resin, 11-22 parts of water, 4-8 parts of pigment, 6-15 parts of an auxiliary agent, 2-7 parts of white carbon black, 2-8 parts of activated carbon, 1-3 parts of nano titanium dioxide and 0.5-1.5 parts of a silver ammonia solution.

2. The environment-friendly paint for furniture according to claim 1, characterized in that: the silver ammonia solution is prepared by the following steps: dropwise adding 1-4% ammonia water into 1-4% silver nitrate solution while stirring to generate precipitate, and continuously dropwise adding until the precipitate is just dissolved.

3. The environment-friendly paint for furniture according to claim 1, characterized in that: the mass ratio of the white carbon black to the active carbon is 1: (1-1.3).

4. The environment-friendly paint for furniture according to claim 1, characterized in that: the activated carbon is further subjected to the following modification steps:

a1: adding absolute ethyl alcohol into manganese acetate tetrahydrate for dissolving to obtain 0.2-0.24mol/L impregnation liquid;

a2: adding the activated carbon into the impregnation liquid, stirring at normal temperature for 24-48h, drying at 78-85 ℃ for 28-30h, and finally performing heat treatment at 370-390 ℃ for 8-15 min to obtain the MnOx-loaded activated carbon.

5. The environment-friendly paint for furniture according to claim 4, wherein: the mass ratio of the activated carbon to the manganese acetate tetrahydrate is 1: (0.010-0.11).

6. The environment-friendly paint for furniture according to claim 1, characterized in that: the white carbon black is further modified by the following steps:

b1: ultrasonically and uniformly mixing the white carbon black with absolute ethyl alcohol and water, wherein the volume ratio of the water to the absolute ethyl alcohol is 0.2-1, adding concentrated hydrochloric acid, adjusting the pH to be 1.5-3, dropwise adding butyl titanate at a constant speed at 40-60 ℃, uniformly stirring, wherein the volume ratio of the butyl titanate to the absolute ethyl alcohol is 0.1-5, and reacting for 4-5 hours;

b2: filtering, washing with absolute ethyl alcohol, drying, calcining at 600 ℃ for 2-3 hours to obtain the loaded TiO₂The white carbon black.

7. The environment-friendly paint for furniture according to claim 1, characterized in that: the nano titanium dioxide is anatase titanium dioxide.

8. The environment-friendly paint for furniture according to claim 1, characterized in that: the particle size of the activated carbon is 2000-100 meshes.

9. The method for preparing the environment-friendly paint for furniture according to claims 1 to 8, wherein the method comprises the following steps: the method comprises the following steps: the components except the acrylic resin are uniformly mixed, and then the acrylic resin is gradually added while stirring, and the stirring is continued to be uniform.

10. The paint spraying process of the environment-friendly paint for furniture according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

s1: spraying furniture environment-friendly paint on the polished furniture for 2-4 times, performing microwave drying after each spraying, pausing for 5-8 minutes after each drying till the surface temperature of the furniture reaches 50-60 ℃, then continuing to perform microwave drying, performing next spraying after the microwave drying is performed for 3-5 times, and drying for 3-6 hours at 40-50 ℃ after the spraying is finished to obtain the furniture subjected to preliminary spraying paint;

s2: and (4) spraying finishing paint on the exterior of the primarily painted furniture and drying.

Technical Field

The invention relates to the technical field of furniture paint, in particular to environment-friendly furniture paint and a preparation method and a paint spraying process thereof.

Background

At present, wooden furniture is more and more popular, but at present, the price of the solid wood is expensive, compared with the solid wood, an artificial board has various veneers due to the fact that the assembly and the disassembly are convenient, the appearance design is various and has individuality, and the artificial board is a board which is manufactured by mixing leftover bits and pieces generated in the processing process of wood with other fibers.

The existing environmental-friendly paint with the publication number of CN105860704B comprises, by weight, 22-25 parts of acrylic resin, 5-9 parts of titanium dioxide, 9-17 parts of calcium oxide, 10-16 parts of aromatic hydrocarbon solvent oil, 6-11 parts of natural resin, 5-6 parts of cobalt iso-octoate, 9-14 parts of tung oil, 23-29 parts of water, 6.5-12 parts of carbamide and 0.5-1.5 parts of sodium alkyl benzene sulfonate.

The above prior art solutions have the following drawbacks: for furniture made of artificial boards, plywood and the like manufactured by using a large amount of adhesives, pollutants contained in the adhesives, particularly formaldehyde, can be gradually released to the surrounding environment, the release period can be as long as 3-15 years, the environment-friendly paint film can slightly seal the formaldehyde, but the environment-friendly paint film cannot absorb the formaldehyde, and the like, but a large amount of formaldehyde is released into the air, so that the environment-friendly paint capable of further removing the formaldehyde is needed.

Disclosure of Invention

The invention aims to provide the environment-friendly furniture paint capable of removing formaldehyde.

The above object of the present invention is achieved by the following technical solutions:

the environment-friendly furniture paint comprises, by weight, 75-88 parts of acrylic resin, 11-22 parts of water, 4-8 parts of pigment, 6-15 parts of an auxiliary agent, 2-7 parts of white carbon black, 2-8 parts of activated carbon, 1-3 parts of nano titanium dioxide and 0.5-1.5 parts of a silver ammonia solution.

By adopting the technical scheme, when the environment-friendly paint is used, the silver-ammonia solution firstly permeates into the material of furniture, and a part of the silver-ammonia solution reacts with free formaldehyde in the material of the furniture, so that the release of the formaldehyde is initially prevented from the source; when formaldehyde permeates into the paint film, when light exists, the nano titanium dioxide plays a role in catalytic decomposition on the formaldehyde, so that the formaldehyde is decomposed into harmless substances, and when no light exists, the white carbon black and the active carbon are porous materials, so that the formaldehyde permeated into the paint film can be adsorbed, the formaldehyde is prevented from being directly volatilized into an indoor environment, the formaldehyde is not easily released, and the formaldehyde can be removed.

The invention is further configured to: the silver ammonia solution is prepared by the following steps: dropwise adding 1-4% ammonia water into 1-4% silver nitrate solution while stirring to generate precipitate, and continuously dropwise adding until the precipitate is just dissolved.

The invention is further configured to: the mass ratio of the white carbon black to the active carbon is 1: (1-1.3).

By adopting the technical scheme, the hardness and the strength of the white carbon black are higher than those of the active carbon, the adsorption performance of the active carbon is stronger than that of the white carbon black, and the formed paint film has higher strength and hardness and can keep better adsorption performance to formaldehyde at the same time in the proportion, so that the formed paint film can play a better protection role on furniture.

The invention is further configured to: the activated carbon is further subjected to the following modification steps:

a1: adding absolute ethyl alcohol into manganese acetate tetrahydrate for dissolving to obtain 0.2-0.24mol/L impregnation liquid;

a2: adding activated carbon into the impregnation liquid, stirring at normal temperature for 24-48h, drying at 78-85 ℃ for 28-30h, and finally performing heat treatment at 370-390 ℃ for 8-15 min to obtain the supported MnO_xThe activated carbon of (1).

By adopting the technical scheme, manganese acetate loaded on the activated carbon is decomposed under the action of high temperature, as represented by the following reaction formula: mn (CH)₃COO)₂·4H₂O＝MnO_x+CO₂+H₂O to obtain a supported MnO_xModified activated carbon of, MnO_xHas the function of catalytic oxidation and can convertThe formaldehyde is oxidized into water and carbon dioxide, the activated carbon has an enrichment function on the formaldehyde, so that the concentration of the formaldehyde around is increased, the catalytic oxidation speed of the manganese oxide on the formaldehyde is accelerated, the formaldehyde which is not subjected to the catalytic oxidation in time is physically adsorbed on the activated carbon, and after the methanol attached in the pore volume of the activated carbon is oxidized, the activated carbon can still continue the adsorption process, so that the continuous adsorption capacity of the formic acid is greatly improved, and pollutants can be thoroughly removed; meanwhile, the paint film can still adsorb and remove formaldehyde in the absence of light, and the paint film can better remove formaldehyde in the presence of light and in the absence of light by matching with the nano titanium dioxide.

The invention is further configured to: the mass ratio of the activated carbon to the manganese acetate tetrahydrate is 1: (0.010-0.11).

By adopting the technical scheme, the obtained modified activated carbon loaded MnO_xThe mass of the modified activated carbon is between 0.5 and 3 percent of that of the activated carbon, and in the range, the modified activated carbon has the highest removal rate of formaldehyde because of MnO_xToo much loading can cause the activated carbon to lose more specific surface area and pore volume, thereby influencing the adsorption of the activated carbon on formaldehyde and further influencing the removal speed of the modified activated carbon when MnO is used_xIf the load is too small, the catalytic degradation speed of the modified activated carbon on formaldehyde is slow, so that the removal speed of the modified activated carbon is influenced.

The invention is further configured to: the white carbon black is further modified by the following steps:

b1: ultrasonically and uniformly mixing the white carbon black with absolute ethyl alcohol and water, wherein the volume ratio of the water to the absolute ethyl alcohol is 0.2-1, adding concentrated hydrochloric acid, adjusting the pH to be 1.5-3, dropwise adding butyl titanate at a constant speed at 40-60 ℃, uniformly stirring, wherein the volume ratio of the butyl titanate to the absolute ethyl alcohol is 0.1-5, and reacting for 4-5 hours;

b2: filtering, washing with absolute ethyl alcohol, drying, calcining at 600 ℃ for 2-3 hours to obtain the loaded TiO₂The white carbon black.

Through adopting above-mentioned technical scheme, the white carbon black load nanometer that obtains under this condition just is mostly the titanium dioxide of acute state type, make formaldehyde enter into behind the paint film, in by activated carbon adsorption, can be adsorbed by white carbon black, after white carbon black adsorbs formaldehyde, when having light, the titanium dioxide of white carbon black load can carry out catalytic oxidation to formaldehyde, make formaldehyde can be decomposed, thereby white carbon black can continue to adsorb formaldehyde, it lasts the ability of getting rid of formaldehyde to have improved, white carbon black plays the enrichment effect to formaldehyde simultaneously, make titanium dioxide improve the catalytic oxidation efficiency of formaldehyde, thereby help improving the removal rate of formaldehyde.

The invention is further configured to: the nano titanium dioxide is anatase titanium dioxide, and the particle size is 10-20 nm.

By adopting the technical scheme, the anatase type titanium dioxide has better photocatalytic performance, so that the removal efficiency of the titanium dioxide to formaldehyde is higher when light exists.

The invention is further configured to: the particle size of the activated carbon is 2000-100 meshes.

The invention is further configured to: the auxiliary agent is one or more of a defoaming agent, a wetting agent, a thickening agent, a bactericide and a flatting agent.

The invention also aims to provide a preparation method of the environment-friendly furniture paint, which comprises the following steps:

the components except the acrylic resin are uniformly mixed, and then the acrylic resin is gradually added while stirring, and the stirring is continued to be uniform.

The invention aims at providing a paint spraying process of environment-friendly furniture paint, which comprises the following steps:

s1: spraying furniture environment-friendly paint on the polished furniture for 2-4 times, performing microwave drying after each spraying, pausing for 5-8 minutes after each drying till the surface temperature of the furniture reaches 50-60 ℃, then continuing to perform microwave drying, performing next spraying after the microwave drying is performed for 3-5 times, and drying for 3-6 hours at 40-50 ℃ after the spraying is finished to obtain the furniture subjected to preliminary spraying paint;

s2: and (4) spraying finishing paint on the exterior of the primarily painted furniture and drying.

Through adopting above-mentioned technical scheme, the spraying many times, it is thinner to make the membrane of painting at every turn, the environmental protection lacquer has been avoided producing the sagging phenomenon, intermittent type microwave drying carries out primary drying to the paint film, and when carrying out primary drying, microwave drying makes hydrone and silver-ammonia solution can take place the polarization and along the direction neatly arranged of microwave electric field, then rotate along with the interactive change of high frequency alternating electric field direction rapidly, and produce violent collision and friction, be favorable to in silver-ammonia solution molecule permeates the furniture fast, later further after drying the paint film, spraying finishing paint and drying, finishing paint makes the surface gloss of furniture better, and can carry out further closure according to the surface to its paint film, make formaldehyde be difficult for releasing indoor.

In conclusion, the beneficial technical effects of the invention are as follows:

1. when no light exists in the environment-friendly paint, the white carbon black and the activated carbon are porous materials and can also adsorb formaldehyde permeating into a paint film, and when light exists, the nano titanium dioxide plays a role in catalytic decomposition on the formaldehyde, so that the formaldehyde is decomposed into harmless substances, the effect of removing the formaldehyde is achieved, and the paint film has higher strength and hardness;

2. by setting the load to carry MnO_xActivated carbon of (2) supported with TiO₂The white carbon black enables the activated carbon and the white carbon black to adsorb formaldehyde, and meanwhile, when light exists, TiO is used₂Can be used for catalyzing and decomposing formaldehyde, and MnO is used in the absence of light_xThe formaldehyde can be continuously catalytically decomposed, so that the formaldehyde can be continuously removed by a paint film, and meanwhile, the formaldehyde in the activated carbon and the white carbon black can be continuously adsorbed after being decomposed, so that the formaldehyde continuously removing capability of the paint film is improved;

3. through setting up this paint spraying process, help silver ammonia solution infiltration furniture in, make silver ammonia solution can be more with the interior free formaldehyde of furniture material react, the release of formaldehyde has tentatively been prevented from the source.

Detailed Description

The examples are further illustrated below:

the acrylic resin is AA-8662S, which is purchased from Suzhou Qingtian New materials Co., Ltd;

anatase type nano titanium dioxide with the model of DK-TiO₂-a10, size 10nm, available from tokyo delco island technologies ltd;

activated carbon with a particle size of 200 meshes and a passing rate of more than or equal to 90 percent, which is purchased from Qisheng charcoal of Jiangsu GmbH science and technology Limited;

white carbon black with the model of W-200 and the particle size of 14nm, purchased from Jingjinda New materials Co., Ltd, Bo ai county;

preservative, model DL-T201, available from derby chemical;

a defoamer, model B-220, available from the Federal;

humectant, model ZY-8131, available from Shanghai catalpi chemical Co., Ltd;

thickener, model number CO-0065, available from south star new materials of guangdong limited.