WO2021175065A1 - Organic-inorganic hybrid fireproof coating and preparation method therefor - Google Patents

Abstract

The embodiments of the present application provide an organic-inorganic hybrid fireproof coating and a preparation method therefor, and relate to the field of fireproof coatings. The raw materials of the fireproof coating include, by mass percentages, 15-22% of potassium water glass, 5-10% of a vinyl acetate-ethylene copolymer emulsion, 0.2-0.6% of cellulose, 0.2-0.5% of an aqueous dispersant, 0.1-0.3% of an aqueous wetting agent, 0.3-0.5% of an aqueous defoamer, 2.2-4.1% of a film forming auxiliary, 13-28% of a filler auxiliary, 20-30% of a flame retardant, and 22-23.6% of water. The preparation method involves adding a dispersant, a wetting agent, a defoamer, a film forming auxiliary and water to a cellulose solution, and stirring same; then adding a rutile-type titanium dioxide powder, a filler auxiliary and a flame retardant, and stirring same; adding a vinyl acetate-ethylene copolymer emulsion, and stirring same; and adding potassium water glass, and stirring same. The fireproof coating has the characteristics of a high-temperature resistance, a good water resistance, a high fireproof rating, a fast drying speed, etc.

Description

Organic-inorganic hybrid fireproof coating and preparation method thereof

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office on March 6, 2020, with the application number CN202010150628.5, and the invention title "an organic-inorganic hybrid fire-retardant coating and its preparation method", which The entire content is incorporated into this application by reference.

Technical field

The invention relates to the technical field of fireproof coatings, in particular to an organic-inorganic hybrid fireproof coating and a preparation method thereof.

Background technique

In densely populated areas, such as railway stations, high-speed railway stations, moving railway stations, airports, shopping malls, stadiums, schools and other public places, steel structures are often used as the main building, and fire-resistant coatings are applied to the surface of the steel structure according to the fire rating. So as to protect the main body of the building from collapsing in the event of a fire.

At present, the main film-forming material of thin fire-retardant coatings is vinyl acetate-ethylene copolymer emulsion.

However, this type of fireproof coating has the following problems: 1. The water resistance is poor, and the phenomenon of blistering, whitening, and blooming will occur for a long time, which affects the fire rating; 2. When encountering an open flame, the emulsion itself will burn, and Release different levels of harmful gases. Affect the fire rating.

In addition, inorganic coating is a kind of coating with inorganic material as the main film-forming substance, which is the abbreviation of all-inorganic mineral coating. Inorganic coatings are inorganic polymer coatings composed of inorganic polymers and dispersed activated metals, metal oxide nanomaterials, and rare earth ultrafine powders. They can quickly react with iron atoms on the surface of steel structures to form a physical and chemical dual protective effect. The inorganic polymer anticorrosive coating is non-polluting to the environment, has a long service life, and has an anti-corrosion performance that has reached the international advanced level. It is a high-tech replacement product that meets the requirements of environmental protection. However, the temperature resistance, water resistance, and fire rating of the existing inorganic coatings still need to be improved.

Summary of the invention

The purpose of the embodiments of this application is to provide an organic-inorganic hybrid fire-retardant coating and a preparation method thereof. It uses inorganic silicate as the main raw material and vinyl acetate-ethylene copolymer emulsion as the base material, and the obtained fire-retardant coating is resistant to High temperature resistance, good water resistance, high fire rating, fast drying speed, etc.

In the first aspect, the embodiments of the present application provide an organic-inorganic hybrid fire-retardant coating. In terms of mass percentage, its raw materials include:

In the above technical scheme, potassium water glass is used as the main raw material, and vinyl acetate-ethylene copolymer emulsion is used as the base material. The potassium water glass is a silicate inorganic film-forming material, and its mechanical properties (such as toughness, strength, resistance) The freeze-thaw properties, surface effects, etc.) are not as good as organic film-forming materials. In this application, the organic film-forming materials such as vinyl acetate-ethylene copolymers are used for hybrid modification to supplement the deficiency of inorganic film-forming materials and add fibers. Add water-based dispersant to play the effect of dispersing filler, add water-based wetting agent to improve the wetting performance of the coating, add water-based defoamer to eliminate air bubbles generated under dynamic conditions (such as during construction) , To avoid the adverse effect of bubbles on the appearance effect, add film-forming additives to assist the film-forming material to form a good film under low temperature conditions, and add filler additives and flame retardants, the resulting fire retardant coating has high temperature resistance and water resistance Good, high fire rating, fast drying speed, etc. Specifically, potassium water glass has the characteristics of inorganic substances, and its temperature resistance is particularly good. Not only will it not burn at high temperatures, but it can also be flame retardant; it is also waterproof and breathable, allowing the water inside the building to evaporate freely. , To keep the building dry, to achieve the natural moisture-proof and mildew-proof effect. At the same time, it has the filtering effect of alkali substances, which can prevent the coating from forming bubbles, generating thermal bursts, and peeling off due to scales. Potassium water glass and filler additives undergo petrification to form a kind of water-proof and acid-proof silicic acid rock.

In a possible implementation manner, the mass ratio of potassium water glass and vinyl acetate-ethylene copolymer emulsion in the raw materials is 1.5-4.

In the above technical scheme, the mass ratio of potassium water glass and vinyl acetate-ethylene copolymer emulsion is 1.5-4, although the greater the ratio of potassium water glass and vinyl acetate-ethylene copolymer emulsion, the stronger the fire resistance and the better the insulation. The thermal efficiency attenuation is also smaller. However, if the ratio of the two is too large (for example, all potassium water glass is used), it will lead to abnormal conditions such as poor coating strength, poor toughness, and poor appearance effect.

In a possible implementation manner, the raw material further includes 0.6% to 1% of surfactant in terms of mass percentage.

In the above technical solution, a certain amount of surfactant is added to ensure the low-temperature storage stability of the coating and avoid abnormal deterioration.

In a possible implementation manner, based on the mass percentage of the total amount of raw materials, the filler additives include: rutile titanium dioxide 4% to 6%, expandable graphite 1% to 4%, and calcined kaolin 3% to 7% , Perlite 2% to 5%, vermiculite 3% to 6% and mica powder 2% to 5%.

In the above technical scheme, a certain amount of rutile titanium dioxide, expandable graphite, calcined kaolin, perlite, vermiculite, and mica powder are used to form a filler additive, which can not only play a framework and fill role, but also adjust rheological properties , Improve the mechanical strength, adjust the optical performance, and it can also chemically react with the film-forming substance, the formed coating film can effectively block the penetration of light, improve its water resistance and weather resistance, and its mineral components can also interact with potassium The water glass is petrified.

In a possible implementation, the model of potassium water glass is AH-K1;

And/or, the model number of the vinyl acetate-ethylene copolymer emulsion is BJ-707;

And/or, the model of cellulose is HS30000YP2;

And/or, the aqueous dispersant is an anionic polymer aqueous dispersant, optionally, the model is 5040;

And/or, the water-based wetting agent is an anionic surfactant, optionally, the model number is 070;

And/or, the water-based defoamer is an acetylene glycol water-based defoamer, optionally, the models are A111 and A11;

And/or, the film-forming aid is propylene glycol and model AH-12 film-forming aid;

And/or, type 201-A of the flame retardant.

In the above technical solution, the raw materials of the above specific model can play a better role.

In the second aspect, the embodiments of the present application provide a preparation method of the organic-inorganic hybrid fireproof coating provided in the first aspect, which includes the following steps:

Add water-based dispersant, water-based wetting agent, water-based defoamer, film-forming aid, and water to the cellulose solution, and stir at 300-400 rpm for 5-10 minutes;

Add rutile titanium dioxide, filler additives and flame retardants, stir at 800-1000 rpm for 15-20 minutes, and detect no particles;

Add vinyl acetate-ethylene copolymer emulsion, stir at 400-600 rpm for 5-10 minutes;

Add potassium water glass and stir at 400-600 rpm for 10-15 minutes.

In the above-mentioned technical scheme, adding various raw materials according to the above-mentioned steps can ensure that the formed fire-resistant coating has the characteristics of high temperature resistance, good water resistance, high fire resistance grade, and fast drying speed. If the feeding order is changed, the dispersion will not be uniform, the fineness will not be dispersed, and the surface will be rough. In severe cases, demulsification will occur, causing all raw materials to be scrapped.

In a possible implementation manner, the method for preparing the cellulose solution is: adding cellulose to part of the water and stirring at 800-1000 rpm until the cellulose is fully dissolved to form a cellulose solution.

In the above technical scheme, the cellulose solution is prepared first to ensure that the cellulose is fully dissolved.

In a possible implementation, the water-based defoamer is a first water-based defoamer and a second water-based defoamer. The first water-based defoamer is added to the cellulose solution, and then the vinyl acetate-ethylene In the step of copolymerizing emulsion, a second aqueous defoamer is added.

In the above technical solution, the first aqueous defoamer is added according to the above method, the first defoamer has the foam suppressing effect, and then the second aqueous defoamer is added in the subsequent steps, and the second antifoamer has the foam breaking effect , To ensure the full effect of the water-based defoamer.

In a possible implementation, the film-forming aid is the first film-forming aid and the second film-forming aid. Add the second film-forming aid.

In the above-mentioned technical solution, the film-forming aid is added in the above-mentioned manner and sequence according to the boiling point of the film-forming aid and the degree of dissolution of the raw material to ensure that the film-forming aid can fully exert its effect.

In a possible implementation manner, the raw material further includes 0.6% to 1% of a surfactant in terms of mass percentage, and the preparation method further includes a step of adding a surfactant in the step of adding potassium water glass.

In the above technical solution, the surfactant is added in the last step of adding potassium water glass. This is because the surfactant cannot be stirred at high speed, otherwise it will fail. Adding in the above manner can prevent the surfactant from affecting the formation of the fireproof coating. And play its role in low-temperature storage.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. If no specific conditions are indicated in the examples, it shall be carried out in accordance with the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used without the manufacturer's indication are all conventional products that can be purchased on the market.

The organic-inorganic hybrid fire-retardant coating and the preparation method thereof according to the embodiments of the present application will be described in detail below.

The embodiment of the application provides an organic-inorganic hybrid fire-retardant coating. In terms of mass percentage, its raw materials include: potassium water glass 15%-22%; vinyl acetate-ethylene copolymer emulsion 5%-10%; cellulose 0.2 %～0.6%; water-based dispersant 0.2%～0.5%; water-based wetting agent 0.1%～0.3%; water-based defoaming agent 0.3～0.5%; film-forming aids 2.2%～4.1%; filler additives 13%～28 %; flame retardant 20%-30%; surfactant 0.6%-1%; and water 22%-23.6%. As an embodiment, the raw materials include: 15%, 17%, 19%, 20%, or 22% of potassium water glass; 5%, 6%, 8% or 10% of vinyl acetate-ethylene copolymer emulsion; Cellulose 0.2%, 0.3%, 0.5% or 0.6%; aqueous dispersant 0.2%, 0.4% or 0.5%; aqueous wetting agent 0.1%, 0.2% or 0.3%; aqueous defoamer 0.3%, 0.4% or 0.5 %; film-forming auxiliary agent 2.2%, 2.5%, 2.7%, 3%, 3.1%, 3.3%, 3.5%, 3.8% or 4.1%; filler auxiliary agent 13%, 15%, 18%, 20%, 23% , 25% or 28%; flame retardant 20%, 25% or 30%; surfactant 0.6%, 0.8% or 1%; and water 22%, 23% or 23.6%, the total mass percentage of each of the above raw materials is 100% is fine.

In the raw materials of this application, the mass ratio of potassium water glass and vinyl acetate-ethylene copolymer emulsion is 1.5-4, preferably 1.5, 2, 2.5, 3, 3.5, 4 or the middle of any two points above. value.

In some embodiments of the present application, the filler additives include: rutile titanium dioxide 4% to 6%, expandable graphite 1% to 4%, calcined kaolin 3% to 7%, based on the mass percentage of the total amount of raw materials. Perlite 2%～5%, vermiculite 3%～6% and mica powder 2%～5%. In order to ensure that the filler additives are fully dissolved and dispersed, the particle size of the filler additives should be at least 500 meshes.

In some embodiments of this application, the model of potassium water glass is AH-K1; the model of vinyl acetate-ethylene copolymer emulsion is BJ-707; the model of cellulose is HS30000YP2; the aqueous dispersant is an anionic polymer aqueous dispersion Optionally, the model is 5040; the water-based wetting agent is an anionic surfactant, optionally, the model is 070; the water-based defoamer is an acetylene glycol water-based defoamer, optionally, the model is A111 And A11; the film-forming aid is propylene glycol and model AH-12; the model of the flame retardant is 201-A (Chengdu Zhuoan).

The embodiment of the present application also provides a method for preparing the above-mentioned organic-inorganic hybrid fireproof coating, which includes the following steps:

S1. Add cellulose to part of the water and stir at 800-1000 rpm until the cellulose is fully dissolved to form a cellulose solution.

S2. Add an aqueous dispersant, an aqueous wetting agent, an aqueous defoamer, a film forming aid, and water to the cellulose solution, and stir at 300-400 rpm for 5-10 minutes.

S3. Add rutile titanium dioxide, filler additives and flame retardants, stir at 800-1000 rpm for 15-20 minutes, and detect no particles, indicating that the pigments, fillers, and flame retardants have been evenly dispersed in the solution. If there are particles detected, it indicates that there are still raw particles that are not evenly dispersed.

S4. Add vinyl acetate-ethylene copolymer emulsion and stir at 400-600 rpm for 5-10 minutes.

S5. Add potassium water glass and surfactant, and stir for 10-15 minutes at 400-600 rpm.

In some embodiments of the present application, the water-based defoaming agent is a first water-based defoaming agent and a second water-based defoaming agent, which are first added to the cellulose solution, that is, in step S2, the first water-based defoaming agent is added, and then the In the step of adding the vinyl acetate-ethylene copolymer emulsion, that is, in step S4, the second aqueous defoamer is added.

The film-forming aid is the first film-forming aid and the second film-forming aid, which are first added to the cellulose solution, that is, in step S2, the first film-forming aid is added, and then in the step of adding potassium water glass, that is, In step S5, a second film-forming aid is added.

The features and performance of the present application will be further described in detail below in conjunction with embodiments.

Examples 1～5

Each embodiment provides a fire retardant paint, the model is: GT-NSP-FP2.5-A outdoor intumescent water-based fire retardant paint for steel structure, the raw material component formula of each example is shown in Table 1.

Table 1 The raw material component formula of Examples 1 to 5

To	Example 1	Example 2	Example 3	Example 4	Example 5
Tap water	twenty one	21.6	21.7	21.4	22.3
Cellulose	0.8	0.6	0.8	0.4	0.5
Aqueous dispersant	0.5	0.3	0.2	0.3	0.4
Water-based wetting agent	0.1	0.2	0.2	0.3	0.2
The first water-based defoamer	0.2	0.1	0.1	0.2	0.1
The first film-forming aid	1	1.5	2	1	1.5
Rutile Titanium Dioxide	5	4	6	4	5
Calcined kaolin	5	4	3	7	5
Expandable graphite powder	1	3	4	2	4
Flame retardant	25	25	30	25	20
Perlite	5	5	4	3	2
Vermiculite	5	3	4	3	6
Mica powder	5	4	3	2	3
Vinyl acetate-ethylene copolymer emulsion	5	10	7	6	7
The second water-based defoamer	0.2	0.1	0.2	0.2	0.2
Potassium water glass	20	15	18	twenty two	20
The second film forming aid	1.2	2.6	1.4	1.6	1.8
Surfactant	0	0	0.6	0.6	1
total	100	100	100	100	100

Comparative example 1～4

Each comparative example provides a fire retardant coating, and the raw material component formula of each comparative example is shown in Table 2.

Table 2 The raw material component formula of Comparative Examples 1 to 4

To	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4
Tap water	22.3	22.3	22.3	22.3

Cellulose	0.5	0.5	0.5	0.5
Aqueous dispersant	0.4	0.4	0.4	0.4
Water-based wetting agent	0.2	0.2	0.2	0.2
The first water-based defoamer	0.1	0.1	0.1	0.1
The first film-forming aid	1.5	1.5	1.5	1.5
Rutile Titanium Dioxide	5	5	5	5
Calcined kaolin	5	5	5	5
Expandable graphite powder	4	4	4	4
Flame retardant	20	20	20	20
Perlite	2	2	2	2
Vermiculite	6	6	6	6
Mica powder	3	3	3	3
Vinyl acetate-ethylene copolymer emulsion	0	27	13.5	4.5
The second water-based defoamer	0.2	0.2	0.2	0.2
Potassium water glass	27	0	13.5	22.5
The second film forming aid	1.8	1.8	1.8	1.8
Surfactant	1	1	1	1
total	100	100	100	100

The model and manufacturer information of the above raw materials are as follows:

Potash water glass: AH-K1, Oriental Aohan;

Vinyl acetate-ethylene copolymer emulsion: BJ-707, Dongfang Petrochemical;

Cellulose: HS30000YP2, Clariant;

Aqueous dispersant: 5040, Nopco;

Water-based wetting agent: 070, Dow;

The first water-based defoamer: A111, BASF;

The second water-based defoamer: A11, Rhodia;

The first film-forming aid: propylene glycol, Jiangsu Baiyao;

The second film-forming aid: AH-12, Oriental Aohan;

Surfactant: 3320, BYK;

Expandable graphite powder: 5200, Orr graphite;

Rutile Titanium Dioxide: 996, Dragon Mang;

Perlite: Chengdu Ou Ning;

Vermiculite: Chengdu Naibang Construction;

Mica powder: 1250 mesh, Chuzhou;

Flame retardant: Chengdu Zhuoan.

The preparation process of the fire-retardant coatings of the above-mentioned embodiments and comparative examples are generally carried out according to the following process:

S1. Slowly add cellulose to the tap water in the production tank and stir at 1000 rpm until the cellulose is fully dissolved.

S2. Slowly add the aqueous dispersant, the first aqueous defoamer, the aqueous wetting agent, the first film forming aid, and tap water to the dissolved cellulose solution, and stir for 8 minutes at 400 rpm.

S3. Add rutile titanium dioxide, mica powder, calcined kaolin, expandable graphite powder, perlite, vermiculite, flame retardant, stir at 1000 rpm, and detect no particles.

S4. Add the ethylene copolymer emulsion and the second water-based defoamer into the production tank and stir at a medium speed of 600 rpm for 8 minutes.

S5. Add the potassium sodium silicate, the second film forming aid, and the surfactant into the production tank, and stir at a medium speed of 600 rpm for 12 minutes.

In the following, the comprehensive performance of the fireproof coatings of the above-mentioned examples and comparative examples is tested by dry board experiments.

Dry board experiment: Workpiece preparation, first brush the I-shaped steel with anti-corrosion primer (thickness 50-60 microns), dry for 24 hours before spraying fire-resistant paint (dilute the thin-type fire-resistant paint with tap water to a solution of about 10% before proceeding Spraying), the thickness of the fireproof coating is 5±0.5mm. After construction, check the appearance, surface drying time, and actual drying time; dry under natural environmental conditions for 7 days to test comprehensive performance (water resistance, acid resistance, alkali resistance, low temperature cycle resistance, freeze-thaw cycle resistance, heat exposure resistance, humidity resistance , Salt spray corrosion resistance, UV radiation resistance and fire resistance grade).

The comprehensive performance of the product is implemented in accordance with the GB/T14907-2018 "Fireproof Coatings for Steel Structures". The comprehensive performance testing items and standards are shown in Table 3. The results are shown in Table 4.

Table 3 Comprehensive performance test items and standards

Table 4 Comprehensive performance test results

According to the results of Examples 1 to 5 and Comparative Examples 1 to 2, it can be seen that the combination of potassium sodium silicate and ethylene copolymer emulsion has very excellent fire resistance, which is more than 1h higher than the fire resistance of conventional water-based thin fire retardant coatings, and at the same time Good weather resistance, super alkali resistance, good water resistance, and heat exposure resistance are very good, indicating that both potassium water glass and ethylene copolymer emulsion are indispensable; according to the results of Examples 1 to 5 and Comparative Examples 3 to 4 It can be seen that the greater the ratio of potassium water glass to ethylene copolymer emulsion, the stronger the fire resistance and the smaller the attenuation of thermal insulation efficiency. However, if the ratio of potassium water glass to ethylene copolymer emulsion is too large, cracks are likely to occur. . According to Examples 1 to 5, there is no surfactant added in Examples 1 to 2, and abnormal deterioration occurs in low-temperature storage, and there is a slight water separation phenomenon in the tank state. The addition amount of surfactants in Examples 3 to 5 exceeds 0.6% Later, the low temperature storage stability is better.

In summary, the organic-inorganic hybrid fire-retardant coating and its preparation method in the examples of this application use inorganic silicate as the main raw material and vinyl acetate-ethylene copolymer emulsion as the base material, and the resulting fire-retardant coating is resistant to High temperature resistance, good water resistance, high fire rating, fast drying speed, etc.

The above descriptions are only examples of the present application, and are not used to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims (22)

1. An organic-inorganic hybrid fire-retardant coating, which is characterized in that, in terms of mass percentage, its raw materials include:

   
2. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of potassium water glass in the raw material is 15%, 17%, 19%, 20% or 22%.
3. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of the vinyl acetate-ethylene copolymer emulsion in the raw material is 5%, 6%, 8% or 10%.
4. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of cellulose in the raw material is 0.2%, 0.3%, 0.5% or 0.6%.
5. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of the aqueous dispersant in the raw material is 0.2%, 0.4% or 0.5%.
6. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of the aqueous wetting agent in the raw material is 0.1%, 0.2% or 0.3%.
7. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of the water-based defoamer in the raw material is 0.3%, 0.4% or 0.5%.
8. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of the film-forming aid in the raw material is 2.2%, 2.5%, 2.7%, 3%, 3.1%, 3.3%, 3.5%, 3.8% or 4.1%.
9. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of filler additives in the raw materials is 13%, 15%, 18%, 20%, 23%, 25% or 28%. %.
10. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of the flame retardant in the raw material is 20%, 25% or 30%.
11. The organic-inorganic hybrid fireproof coating according to claim 1, wherein the mass percentage of water in the raw material is 22%, 23% or 23.6%.
12. The organic-inorganic hybrid fireproof coating according to any one of claims 1 to 3, wherein the mass ratio of the potassium water glass and the vinyl acetate-ethylene copolymer emulsion in the raw material is 1.5 ~4.
13. The organic-inorganic hybrid fire-retardant coating according to any one of claims 1 to 11, characterized in that, in terms of mass percentage, the raw material further comprises 0.6% to 1% of a surfactant.
14. The organic-inorganic hybrid fireproof coating according to claim 13, wherein the mass percentage of the surfactant in the raw material is 0.6%, 0.8% or 1%.
15. The organic-inorganic hybrid fireproof coating according to claim 1 or 9, characterized in that, based on the mass percentage of the total amount of raw materials, the filler additives include: rutile titanium dioxide 4% to 6%, expandable type Graphite is 1% to 4%, calcined kaolin is 3% to 7%, perlite is 2% to 5%, vermiculite is 3% to 6%, and mica powder is 2% to 5%.
16. The organic-inorganic hybrid fireproof coating according to claim 15, wherein the particle size of the filler additive is above 500 mesh.
17. The organic-inorganic hybrid fireproof coating according to any one of claims 1 to 10, wherein the model of the potassium water glass is AH-K1;

    And/or, the model number of the vinyl acetate-ethylene copolymer emulsion is BJ-707;

    And/or, the model number of the cellulose is HS30000YP2;

    And/or, the aqueous dispersant is an anionic polymer aqueous dispersant, optionally, the model is 5040;

    And/or, the water-based wetting agent is an anionic surfactant, optionally, the model number is 070;

    And/or, the water-based defoaming agent is an acetylene glycol water-based defoaming agent, optionally, the models are A111 and A11;

    And/or, the film-forming aid is propylene glycol and a film-forming aid of model AH-12;

    And/or, the model number 201-A of the flame retardant.
18. A method for preparing the organic-inorganic hybrid fire-retardant coating according to any one of claims 1-17, characterized in that it comprises the following steps:

    Add the aqueous dispersant, the aqueous wetting agent, the aqueous defoamer, the film forming aid, and water to the cellulose solution, and stir for 5-10 minutes at 300-400 rpm;

    Add the rutile-type titanium dioxide, the filler auxiliary and the flame retardant, stir at 800-1000 rpm for 15-20 minutes, and detect that there is no particle;

    Adding the vinyl acetate-ethylene copolymer emulsion, stirring at 400-600 rpm for 5-10 minutes;

    Add the potassium water glass and stir at 400-600 rpm for 10-15 minutes.
19. The preparation method according to claim 18, wherein the preparation method of the cellulose solution is: adding part of the water to the cellulose and stirring at a speed of 800-1000 rpm until the cellulose is fully dissolved , The formation of cellulose solution.
20. The preparation method according to claim 18, wherein the water-based defoamer is a first water-based defoamer and a second water-based defoamer, and the first water-based defoamer is added to the cellulose solution first, and then In the step of adding the vinyl acetate-ethylene copolymer emulsion, a second aqueous defoamer is added.
21. The preparation method according to claim 18, wherein the film-forming aid is a first film-forming aid and a second film-forming aid, and the first film-forming aid is added to the cellulose solution first, and then In the step of adding the potassium water glass, a second film-forming aid is added.
22. The preparation method according to claim 18, characterized in that, in terms of mass percentage, the raw material further comprises 0.6% to 1% of a surfactant, and the preparation method further comprises adding in the step of adding the potassium water glass Surfactant step.