CN112300610A

CN112300610A - Ecological inorganic coating

Info

Publication number: CN112300610A
Application number: CN202011299438.6A
Authority: CN
Inventors: 杨顺鑫; 杨诗精
Original assignee: Foshan Shunde District Wenbao Technology Co ltd
Current assignee: Foshan Shunde District Wenbao Technology Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-02-02

Abstract

The invention discloses an ecological inorganic coating and a preparation method thereof, wherein the ecological inorganic coating is composed of at least the following components in parts by weight: oyster shell powder, diatomite, volcanic ash, dispersible pure plant gelatine powder, a dispersing agent, tourmaline-loaded nano titanium dioxide, adipic dihydrazide, cellulose ether and a defoaming agent. The paint designed by reasonable gradation contains low-content (or no) volatile organic compounds, has special combustion performance, can efficiently decompose formaldehyde, can be used by adding water and stirring instead of latex paint, and effectively solves the problem of high storage and transportation cost of the traditional latex paint.

Description

Ecological inorganic coating

Technical Field

The invention relates to the field of inorganic coatings, in particular to an ecological inorganic coating and a preparation method thereof.

Background

In the paint industry, water-based paints and powder paints tend to replace solvent-based paints which are seriously polluted, and the water-based paints are widely applied. However, the water-based latex paint for building used at present is composed of polymer emulsion, filler, auxiliary agent and water, wherein the auxiliary agent and water are used for producing, storing and transporting the paint and account for more than half of the weight and price of the paint. Most of the water-based paint is water, a large amount of plastic or iron storage tanks are needed for storing and using the liquid latex paint, and a large amount of manpower and material resources are needed for increasing the recovery treatment liquid of the storage tanks, so that the cost is increased, and the resource waste is also caused. In the industrial protective coating, the epoxy resin coating is a mainstream product, is mostly a solvent-based coating, generally contains a large amount of volatile organic compounds (200-; in addition, organic compounds volatilized into the atmosphere and nitrogen oxides are subjected to photochemical reaction under the action of ultraviolet rays to form smoke, so that the PM2.5 (fine particle) index is improved to a certain extent, and the pollution caused by the smoke is second to that of automobile exhaust.

Although the existing latex paint can basically reach the environmental protection grade, the pollution of formaldehyde and the like can not be avoided in the decoration process, and particularly, a large amount of formaldehyde is released by furniture, composite floors and other substances to influence the health of residents. In order to solve the problem of formaldehyde pollution in home, many companies focus on research on the effect of adding substances into the coating to remove formaldehyde, but at present, physical adsorption is mainly used, the physical adsorption of formaldehyde is easily saturated, and when the temperature and humidity change, the formaldehyde and the like are released to cause secondary pollution. The development of new generation coatings should also take into account the fire performance of the article from a fire fighting point of view, especially in manufacturing and transport processes and applications, in addition to the environmental protection (e.g. formaldehyde removal, no volatile organic compounds and no heavy metals) of the article. The combustion performance refers to all physical and chemical changes generated when the material is combusted or meets fire, and the performance is measured by the characteristics of the ignitability and flame propagation of the surface of the material, heat generation, fuming, carbonization, weight loss (for example, the mass loss rate of the material with better combustion performance is less than or equal to 50 percent), the generation of toxic products and the like.

Disclosure of Invention

The invention aims to solve the technical problem of providing an ecological inorganic coating and a preparation method thereof, which can effectively decompose formaldehyde, have special combustion performance, contain low-content volatile organic compounds, can be used as the traditional emulsion paint by adding water and stirring during use, and can effectively solve the problem of high storage and transportation cost of the emulsion paint. In order to solve the technical problems, the invention provides the following technical scheme:

on the one hand, the ecological inorganic coating is characterized by comprising at least the following components in parts by weight: 30-50 parts of oyster shell powder, 10-20 parts of diatomite, 15-25 parts of volcanic ash, 5-15 parts of dispersible pure plant gelatine powder, 0.2-2 parts of dispersing agent, 4-5 parts of tourmaline-loaded nano titanium dioxide, 0.1-1 part of adipic dihydrazide, 0.3-0.8 part of cellulose ether and 0.4-0.5 part of defoaming agent, and further, the content of volatile organic compounds of the ecological inorganic coating is less than or equal to 120 g/L.

Further, the components in parts by weight are as follows: 40-50 parts of oyster shell powder, 10-15 parts of diatomite, 15-25 parts of volcanic ash, 10-15 parts of dispersible pure plant rubber powder, 4-5 parts of tourmaline-loaded nano titanium dioxide, 0.2-2 parts of dispersing agent, 0.1-1 part of adipic dihydrazide, 0.3-0.8 part of cellulose ether and 0.4-0.5 part of defoaming agent.

Further, the components in parts by weight are as follows: 45 parts of oyster shell powder, 12.5 parts of diatomite, 20 parts of volcanic ash, 12 parts of dispersible pure plant rubber powder, 4.5 parts of tourmaline-loaded nano titanium dioxide, 1 part of dispersing agent, 0.5 part of adipic dihydrazide, 0.7 part of cellulose ether and 0.5 part of defoaming agent.

Further, the dispersible pure plant gelatine powder is one or more of shellac powder, glutinous rice powder or pine resin powder.

Further, the cellulose ether is one or two of hydroxymethyl cellulose or hydroxyethyl cellulose.

Further, the dispersing agent is one or more of sodium polyphosphate, sodium hexametaphosphate or sodium pyrophosphate.

Further, the sustained combustion time of the ecological inorganic coating is less than or equal to 20 s.

Further, the mass loss rate of the ecological inorganic coating is less than or equal to 50 percent.

The defoaming agent can be an organosiloxane, polyether, silicon and ether graft, amine, imine, and amide.

In another aspect, the present invention provides a method for preparing an ecological inorganic coating, comprising the steps of:

s1: adding the volcanic ash, the dispersible pure plant rubber powder and the cellulose ether into a stirring kettle according to a certain proportion and uniformly stirring;

s2: continuously adding the adipic acid dihydrazide, the tourmaline-loaded nano titanium dioxide, the defoaming agent, the dispersing agent, the oyster shell powder and the diatomite, and uniformly stirring to obtain the coating.

Further, the method also includes step S3: and filtering and screening the prepared coating, packaging the filtered product, and warehousing.

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

according to the invention, through reasonable grading of the diatomite, the oyster shell powder and the volcanic ash, by utilizing the difference of properties such as microporous structures of the diatomite, the oyster shell powder and the volcanic ash, various pollutants including formaldehyde, benzene and other substances can be effectively adsorbed; meanwhile, the tourmaline loaded nano titanium dioxide can catalyze the degradation of substances such as formaldehyde and the like under the condition of no ultraviolet light, thereby achieving the aim of removing formaldehyde efficiently for a long time; in addition, the adipic dihydrazide can capture formaldehyde, so that the retention time of the formaldehyde is prolonged, and the formaldehyde decomposition efficiency is improved; the dispersible pure plant rubber powder is more environment-friendly; the coating designed by reasonable gradation contains low (or no) volatile organic compounds, has special combustion performance, can be used by adding water and stirring instead of latex paint when in use, effectively solves the problem of high storage and transportation cost of the traditional latex paint, and ensures that the ecological paint of the invention can be packaged and sold in a stable and low storage and transportation cost mode.

Drawings

None.

Detailed Description

The invention provides an ecological inorganic coating and a preparation method thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

Example one

The ecological inorganic coating of the invention is prepared by the following method:

s1: adding 25 kg of volcanic ash, 15 kg of shellac powder and 0.3 kg of hydroxymethyl cellulose ether into a stirring kettle according to a proportion, and uniformly stirring at 3500-4000 r/m;

s2: 1 kg of adipic acid dihydrazide, 4 kg of tourmaline-loaded nano titanium dioxide, 0.5 kg of defoaming agent, 0.2 kg of dispersing agent, 50 kg of oyster shell powder and 10 kg of diatomite are continuously added and uniformly stirred to obtain the coating; the content of volatile organic compounds in the coating is less than or equal to 120g/L (specifically, the detection result is about 0g/L), and the mass loss rate of the coating is less than or equal to 50 percent (specifically, 15.9 percent).

S3: filtering and screening the prepared coating to the fineness of less than or equal to 50 mu m, packaging the filtered product, and warehousing.

Example two

s1: adding 15 kg of volcanic ash, 5 kg of shellac powder and 0.8 kg of hydroxyethyl cellulose ether into a stirring kettle according to a proportion, and uniformly stirring at a stirring speed of 3500-;

s2: continuously adding 0.1 kg of adipic dihydrazide, 5 kg of tourmaline-loaded nano titanium dioxide, 0.4 kg of antifoaming agent, 0.4 kg of dispersing agent, 30 kg of oyster shell powder and 20 kg of diatomite, and uniformly stirring to obtain a coating; the content of volatile organic compounds of the coating is less than or equal to 120g/L, and the mass loss rate of the coating is less than or equal to 50 percent.

S3: filtering and screening the prepared coating to the fineness of less than or equal to 40 mu m, packaging the filtered product, and warehousing.

EXAMPLE III

s1: 20 kg of volcanic ash, 10 kg of pine resin powder, 0.3 kg of hydroxyethyl cellulose ether and 0.2 kg of hydroxymethyl cellulose ether are added into a stirring kettle according to the proportion and stirred uniformly, and the stirring speed is 3500-;

s2: continuously adding 0.5 kg of adipic dihydrazide, 4.5 kg of tourmaline-loaded nano titanium dioxide, 0.4 kg of defoaming agent, 1 kg of dispersing agent, 40 kg of oyster shell powder and 15 kg of diatomite, and uniformly stirring to obtain a coating; the content of volatile organic compounds of the coating is less than or equal to 120g/L, and the mass loss rate of the coating is less than or equal to 50 percent.

Example four

s1: 20 kg of volcanic ash, 12 kg of glutinous rice flour and 0.7 kg of hydroxyethyl cellulose ether are added into a stirring kettle according to a proportion and stirred uniformly, wherein the stirring speed is 3500 plus 4000 rpm;

s2: continuously adding 0.5 kg of adipic dihydrazide, 4.5 kg of tourmaline-loaded nano titanium dioxide, 0.5 kg of defoaming agent, 2 kg of dispersing agent, 45 kg of oyster shell powder and 12.5 kg of diatomite, and uniformly stirring to obtain a coating; the content of volatile organic compounds of the coating is less than or equal to 120g/L, and the mass loss rate is less than or equal to 50 percent.

EXAMPLE five

The coatings of the above examples one to four, upon examination, showed sustained burning times of 20s or less (specifically, 0s or less).

EXAMPLE six

The coatings of the above examples one to five, after chemical examination and testing, all showed soluble heavy metal contents: less than or equal to 90mg/kg of lead, less than or equal to 75mg/kg of cadmium, less than or equal to 60mg/kg of chromium and less than or equal to 60mg/kg of mercury.

Comparative example 1

A comparative coating was prepared as follows:

s2: 1 kg of adipic acid dihydrazide, 4 kg of tourmaline-loaded nano titanium dioxide, 0.5 kg of defoaming agent, 50 kg of oyster shell powder and 10 kg of diatomite are continuously added and uniformly stirred to obtain a coating; the content of volatile organic compounds of the coating is less than or equal to 120g/L, and the mass loss rate of the coating is more than 50 percent). Compared with the coating of the first embodiment, the addition of the dispersant is helpful for improving the combustion performance of the coating (particularly, preventing the formation of hot spots of the coating layer and reducing the mass loss rate of the coating to less than or equal to 50 percent).

Comparative example No. two

The dry powder paint was prepared as follows:

s1: 27 kg of white cement, 16.7 kg of acrylate monomer-methacrylate monomer copolymer emulsion powder, 0.3 kg of hydroxymethyl cellulose ether and 0.2 kg of hydroxyethyl cellulose ether are added into a stirring kettle according to the proportion and stirred uniformly, wherein the stirring speed is 3500-;

s2: continuously adding 21 kg of rutile titanium dioxide, 0.5 kg of defoaming agent, 25 kg of calcium carbonate, 4 kg of diatomite, 1.5 kg of bentonite and 3.8 kg of coloring pigment, and uniformly stirring to obtain a coating; the volatile organic compound content of the coating is more than 120g/L, and the mass loss rate is more than 50 percent.

During construction, the dry powder paints of the first to fourth examples and the comparative example are respectively mixed with water according to the proportion of 1: 0.45-0.5, and the mixture is sprayed after being uniformly stirred.

The first to fourth embodiments have the advantages of being consistent with the traditional emulsion paint in construction performance, smooth in paint film, high in hardness, high in strength, ageing-resistant, crack-resistant and the like, and have obvious effects and durability in the aspect of treating formaldehyde, benzene and other pollutants. Compared with the dry powder paint of the comparative example II, the dry powder paint has the advantages of low content of volatile organic compounds, low mass loss rate and capability of efficiently decomposing formaldehyde.

According to the invention, through reasonable grading of diatomite, oyster shell powder and volcanic ash, by utilizing the difference of properties such as microporous structures of the diatomite, the oyster shell powder and the volcanic ash, various pollutants including formaldehyde, benzene and other substances can be effectively adsorbed, and meanwhile, the tourmaline-loaded nano titanium dioxide can be used for catalyzing the degradation of the formaldehyde and other substances under the condition of no ultraviolet light, so that the aim of removing the formaldehyde for a long time and efficiently is achieved, and in addition, the adipic acid dihydrazide can capture the formaldehyde, so that the retention time of the formaldehyde is prolonged, and the efficiency of decomposing the formaldehyde by the tourmaline-loaded nano; the dispersible pure plant rubber powder is more environment-friendly; the invention can obtain dry powder type ecological paint through reasonable gradation, and the ecological paint can be used by adding water and stirring instead of emulsion paint when in use, thereby effectively solving the problem of high storage and transportation cost of the traditional emulsion paint and leading the ecological paint of the invention to be packaged and sold in a stable and low storage and transportation cost mode.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The ecological inorganic coating is characterized by comprising at least the following components in parts by weight: 30-50 parts of oyster shell powder, 10-20 parts of diatomite, 15-25 parts of volcanic ash, 5-15 parts of dispersible pure plant gelatine powder, 0.2-2 parts of dispersing agent, 4-5 parts of tourmaline-loaded nano titanium dioxide, 0.1-1 part of adipic dihydrazide, 0.3-0.8 part of cellulose ether and 0.4-0.5 part of defoaming agent, and further, the content of volatile organic compounds of the ecological inorganic coating is less than or equal to 120 g/L.

2. The ecological inorganic paint as claimed in claim 1, which is characterized by comprising at least the following components in parts by weight: 40-50 parts of oyster shell powder, 10-15 parts of diatomite, 15-25 parts of volcanic ash, 10-15 parts of dispersible pure plant gelatine powder, 0.2-2 parts of dispersing agent, 4-5 parts of tourmaline-loaded nano titanium dioxide, 0.1-1 part of adipic dihydrazide, 0.3-0.8 part of cellulose ether and 0.4-0.5 part of defoaming agent.

3. The ecological inorganic paint as claimed in claim 2, characterized by comprising at least the following components in parts by weight: 45 parts of oyster shell powder, 12.5 parts of diatomite, 20 parts of volcanic ash, 12 parts of dispersible pure plant rubber powder, 1 part of dispersing agent, 4.5 parts of tourmaline-loaded nano titanium dioxide, 0.5 part of adipic dihydrazide, 0.7 part of cellulose ether and 0.5 part of defoaming agent.

4. An ecological inorganic coating according to any one of claims 1 to 3, characterized in that the dispersible pure plant gum powder is one or more of shellac powder, glutinous rice powder or pine resin powder.

5. The eco-inorganic coating material of any one of claims 1 to 4, wherein the cellulose ether is one or both of a hydroxymethyl cellulose ether or a hydroxyethyl cellulose ether.

6. An ecological inorganic paint according to any one of claims 1 to 5, characterized in that the dispersant is one or more of sodium polyphosphate, sodium hexametaphosphate or sodium pyrophosphate.

7. The eco-inorganic paint according to any one of claims 1 to 6, wherein the eco-inorganic paint lasts for 20s or less.

8. The eco-inorganic paint according to any one of claims 1 to 7, wherein the eco-inorganic paint has a mass loss rate of 50% or less.

9. The method for preparing ecological inorganic paint according to any one of claims 1 to 6, characterized by comprising at least the following steps:

10. The method for preparing ecological inorganic paint according to claim 9, further comprising step S3: and filtering and screening the prepared coating, packaging the filtered product, and warehousing.