阅读说明：本技术 一种除甲醛环保水漆 (Formaldehyde-removing environment-friendly water paint ) 是由 姜年超 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种除甲醛环保水漆,其由如下重量百分比的成分制成：丙烯酸乳液26％-32％；纳米二氧化钛5％-9％；纳米电气石粉3％-7％；纳米银颗粒4％-9％；石墨烯纳米片5％-8％；纳米碳纤维5％-8％；纳米碳酸钙4％-7％；助剂1％-6％；余量为水。本发明除甲醛环保水漆主动将空气中的有机物(苯系物,甲醛等)分解成为水和二氧化碳,提高VOC分解效率。(The invention discloses formaldehyde-removing environment-friendly water paint which is prepared from the following components in percentage by weight: 26% -32% of acrylic emulsion; 5% -9% of nano titanium dioxide; 3% -7% of nano tourmaline powder; 4% -9% of nano silver particles; 5% -8% of graphene nanosheets; 5% -8% of carbon nanofiber; 4 to 7 percent of nano calcium carbonate; 1% -6% of an auxiliary agent; the balance being water. The formaldehyde-removing environment-friendly water paint disclosed by the invention actively decomposes organic matters (benzene series, formaldehyde and the like) in the air into water and carbon dioxide, so that the VOC decomposition efficiency is improved.)

1. The formaldehyde-removing environment-friendly water paint is characterized by being prepared from the following components in percentage by weight:

2. the formaldehyde-removing environment-friendly water paint as claimed in claim 1, wherein the auxiliary agent is one or more of a film-forming auxiliary agent, a dispersing agent, a wetting agent, cellulose, a defoaming agent, a pH regulator, a bactericide, an antifreeze agent and a thickener.

3. The formaldehyde-removing environment-friendly water paint as claimed in claim 2, wherein the auxiliary agents are film forming agents, dispersing agents, wetting agents, cellulose, defoaming agents, pH regulators, bactericides, anti-freezing agents and thickening agents.

4. The formaldehyde-removing environment-friendly water paint as claimed in claim 3, wherein the antifreeze is propylene glycol.

5. The formaldehyde-removing environment-friendly water paint as claimed in claim 3, wherein the pH regulator is one or more of citric acid, tartaric acid, phosphoric acid, hydrochloric acid and nitric acid.

6. The formaldehyde-removing environment-friendly water paint as claimed in claim 3, wherein the thickener is one or two of a polyurethane thickener and an alkali swelling thickener.

7. The formaldehyde-removing environment-friendly water paint as claimed in claim 3, wherein the film-forming assistant is dodecyl alcohol ester.

8. The preparation method of the formaldehyde-removing environment-friendly water paint as claimed in claim 1, characterized by comprising the following steps:

s1, weighing the raw materials according to the weight percentage; putting a part of acrylic emulsion, a part of water, nano titanium dioxide, nano tourmaline powder, nano silver particles, graphene nanosheets, nano carbon fibers and nano calcium carbonate into a high-speed dispersion machine for high-speed dispersion at a speed of 1000-2000r/min for 30-60min to obtain a first component;

s2, uniformly stirring the residual acrylic emulsion, the residual water and the auxiliary agent in a stirrer to obtain a second component;

and S3, mixing the first component and the second component in a stirrer.

Technical Field

The invention relates to the field of building materials, in particular to formaldehyde-removing environment-friendly water paint.

Background

Along with the pressure of the environmental protection policy, the environmental protection consciousness of consumers is continuously improved, the VOC emission limit standard is especially brought out in provinces and cities all over the country, and the development of environment-friendly coatings such as non-solvent type coatings, water-based paints and the like is encouraged to bring opportunities. The water paint is a paint which takes water as a solvent and water resin as a main component, does not contain an organic solvent, does not contain benzene, toluene, xylene, formaldehyde and free TDI, does not contain toxic heavy metal, is nontoxic and free of pungent smell, is harmless to human bodies, does not pollute the environment, is plump in paint film, is glittering and translucent, has good flexibility, and has the characteristics of water resistance, wear resistance, aging resistance, yellowing resistance, quick drying, convenient use and the like, so although the traditional paint still occupies a larger market share, the water paint is a green industry and is the future development direction of paints.

Chinese patent document CN106833204A discloses an indoor formaldehyde-removing antibacterial environment-friendly water paint and a preparation method thereof, wherein the water paint with super-strong sterilization function, harmful gas formaldehyde and the like which are easy to adsorb, safe and pollution-free is prepared by proportioning raw materials such as water-based self-crosslinking polyacrylic resin emulsion, deionized water, silver ion solution, rutile titanium dioxide, Maya blue, nano-silicon dioxide, a thickening agent, alcohol ester dodecafilming auxiliary agent and the like according to certain weight parts, and then carrying out a series of operations such as grinding, dissolving, stirring, mixing and the like. The rutile type titanium dioxide containing more than 95% of titanium dioxide is mainly used for firmly locking and decomposing toxic gases such as formaldehyde, benzene, TVOC and the like, and can effectively purify indoor air.

Chinese patent document CN107828288A discloses an anti-formaldehyde type interior wall water paint and a preparation method thereof, wherein the anti-formaldehyde type interior wall water paint is prepared from the following raw materials in percentage by mass: 20-30% of acrylic emulsion, 21-23% of titanium dioxide, 5-7% of kaolin, 8-12% of heavy calcium carbonate, 2-4% of MCC modified calcium carbonate, 6-8% of formaldehyde-resistant powder, 0.8-1% of environment-friendly cosolvent, 1-1.5% of film-forming additive, 0.1-0.2% of wetting agent, 0.1-0.2% of multifunctional pH regulator, 0.5-0.7% of dispersant, 0.3-0.5% of cellulose, 0.1-0.3% of defoamer, 0.1-0.3% of preservative, 0.5-0.8% of mildew inhibitor, 0.2-0.3% of thickener and 20-25% of water. The aim of removing formaldehyde is achieved by mainly using formaldehyde-resistant powder. The anti-formaldehyde powder is a smell-eliminating TK401 produced by Shanghai development chemical technology Limited, and the smell-eliminating TK401 is a nano-scale powder material adopting an inorganic grafting technology, wherein the content of silicon dioxide is 40%, the content of titanium dioxide is 20%, the content of aluminum oxide is 20%, and the balance is effective components for removing formaldehyde.

The water paints described in the above documents have a problem of low VOC decomposition efficiency when applied to architectural coatings. VOCs are volatile organic compounds; the definition of VOC in the environmental protection meaning refers to an active class of volatile organic compounds, including formaldehyde, benzene series and the like.

Disclosure of Invention

In view of the above, the invention aims to provide a formaldehyde-removing environment-friendly water paint with high VOC decomposition efficiency.

The adopted technical scheme is as follows:

the formaldehyde-removing environment-friendly water paint is prepared from the following components in percentage by weight:

further, the auxiliary agent is one or more of a film forming auxiliary agent, a dispersing agent, a wetting agent, cellulose, a defoaming agent, a pH regulator, a bactericide, an antifreeze agent and a thickening agent.

Furthermore, the auxiliary agent comprises a film forming auxiliary agent, a dispersing agent, a wetting agent, cellulose, a defoaming agent, a pH regulator, a bactericide, an antifreeze agent and a thickening agent.

Further, the antifreeze agent is propylene glycol.

Further, the pH regulator is one or more of citric acid, tartaric acid, phosphoric acid, hydrochloric acid and nitric acid.

Further, the thickener is one or two of a polyurethane thickener and an alkali swelling thickener.

Further, the film-forming aid is dodecyl alcohol ester.

The above-mentioned formulations of the respective raw materials are commercially available. The water is preferably deionized water. The following may be employed for the respective auxiliaries:

for example, as the humectant, a hamming FA115 humectant can be used; the dispersant can be SN5040 dispersant of Nopochaceae; the cellulose can adopt Asotblue HBR250 cellulose; the defoaming agent can be NXZ defoaming agent of Nopochaceae; the bactericide can be trojan K10N bactericide; as the acrylic emulsion, a Neocryl BT-26 aqueous acrylic emulsion from Dismann corporation was used. The thickening agent can be polyurethane thickening agent of Dow RM2020 and/or alkali swelling thickening agent of Dow ASE-60.

The preparation method of the formaldehyde-removing environment-friendly water paint comprises the following steps:

s1, weighing the raw materials according to the weight percentage of the components of the formula of the formaldehyde-removing environment-friendly water paint; putting a part of acrylic emulsion, a part of water, nano titanium dioxide, nano tourmaline powder, nano silver particles, graphene nanosheets, nano carbon fibers and nano calcium carbonate into a high-speed dispersion machine for high-speed dispersion at a speed of 1000-2000r/min for 30-60min to obtain a first component;

s2, uniformly stirring the residual acrylic emulsion, the residual water and the auxiliary agent in a stirrer to obtain a second component;

and S3, mixing the first component and the second component in a stirrer.

In the preparation method, the water-based acrylic emulsion is used as an adhesive, and the nano titanium dioxide, the nano tourmaline powder, the nano silver particles, the graphene nanosheets, the nano carbon fibers and the nano calcium carbonate are all nano components. They can be dispersed uniformly in the adhesive at high speed and have unique action.

The nano calcium carbonate has good optical performance, the whiteness of a paint film is increased, the luster is high, and the covering power is not reduced. In the preparation of the water paint, the nano calcium carbonate can ensure that the prepared water paint has good anti-settling effect. The nano calcium carbonate can also partially replace the nano titanium dioxide, and the using amount of the nano titanium dioxide is reduced.

The nano calcium carbonate can effectively degrade harmful gases by photocatalysis under visible light. And chemical bonds can be formed between the graphene nanosheets and the nano calcium carbonate, so that the photocatalytic activity of the nano calcium carbonate can be enhanced, and the decomposition of harmful gases in air is promoted.

Heavy calcium carbonate, light calcium carbonate and MCC-modified calcium carbonate do not have the above-described effects. The MCC modified calcium carbonate is produced by Europe and Asia company, has an average particle size of 10-20 um and a specific surface area of 30-50 square meters per gram.

This may be related to particle size. The particle size of the nano calcium carbonate is between 0.01 and 0.1 mu m. Due to the ultra-fining of the nano calcium carbonate particles, the crystal structure and the surface electronic structure of the nano calcium carbonate particles are changed, and the quantum size effect, the small size effect and the surface effect which are not possessed by other calcium carbonates are generated.

Under the daily visible light, the nano calcium carbonate and the nano titanium dioxide are influenced by the light to generate a photocatalytic reaction similar to photosynthesis, oxygen in the air reacts with water to generate free hydroxyl HO with strong oxidizability, and organic matters (benzene series, formaldehyde and the like) in the air are actively decomposed into water and carbon dioxide. Wherein the photocatalytic activity of the nano titanium dioxide is stronger than that of the nano calcium carbonate.

The graphene nanosheets are formed by stacking single-layer carbon atom plane structure graphene, and the thickness of the graphene nanosheets is nanoscale. The graphene nanosheets respectively form chemical bonds with the nano calcium carbonate and the nano titanium dioxide, so that the photocatalytic reaction is increased.

Carbon Nanofibers (CNF) is a form of chemical vapor grown Carbon fibers, is a discontinuous graphite fiber prepared by cracking vapor phase hydrocarbon, and is a novel submicron reinforcing material.

The invention takes the water-based acrylic emulsion as an adhesive, the Carbon Nanofiber (CNF) as an adsorbent, the nano-silver particles as an electrochemical reaction cathode, and the electrochemical reaction has no selectivity, and can remove VOC (volatile organic compounds), such as formaldehyde, benzene series and other organic and harmful gases in the air. The nano titanium dioxide and the nano calcium carbonate are used as photoelectric conversion agents, the nano titanium dioxide-graphene nanosheets and the nano calcium carbonate-graphene nanosheets are used as composite semiconductor materials, and absorption spectra of the nano titanium dioxide-graphene nanosheets and the nano calcium carbonate-graphene nanosheets can extend to the visible light part. The nano tourmaline powder is used as an anion promoter, has weak surface current under illumination, can make the contacted air have negative charges, and can gather micro particles in the air under the action of electrostatic adsorption, thereby accelerating sedimentation.

An anode reduction reaction is generated between an electrochemical reaction anode and an electrochemical reaction cathode to generate active substances with short service life and strong oxidizability, such as free hydroxyl HO, so that organic matters (benzene series, formaldehyde and the like) in the air are actively decomposed into water and carbon dioxide, and the VOC decomposition efficiency is improved.

In conclusion, the formaldehyde-removing environment-friendly water paint disclosed by the invention can improve the VOC decomposition efficiency.

Detailed Description

The present invention is described in detail below with reference to specific examples, but the use and purpose of these exemplary embodiments are merely to exemplify the present invention, and do not set forth any limitation on the actual scope of the present invention in any form, and the scope of the present invention is not limited thereto.