阅读说明：本技术 一种自洁韧釉漆及其制备方法 (Self-cleaning tough glaze paint and preparation method thereof ) 是由 党文生 查春梅 王贤云 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种自洁韧釉漆及其制备方法。本发明的自洁韧釉漆,包括A组分和B组分,按质量百分比计,所述A组分包含如下组分：亲水性脂肪族异氰酸酯72-82％、异佛尔酮二异氰酸酯12-18％、稀释剂5-10％；所述B组分包含如下组分：水性羟基树脂分散体30-40％、二氧化钛15-20％、硫酸钡6-10％、膨润土0.1-0.5％、碳纳米管分散体3-6％、有机硅氧烷2-3％、助剂2-5％、水余量；其中,所述A组分与所述B组分的质量比为1:(5-9)。本发明的自洁韧釉漆,在室温条件下固化成膜,材料环保、寿命耐久、持久保新,有效地降低了终端用户的使用成本,达到了环保、节材、减排的目的。(The invention discloses a self-cleaning tough glaze paint and a preparation method thereof. The self-cleaning tough glaze paint comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 72-82% of hydrophilic aliphatic isocyanate, 12-18% of isophorone diisocyanate and 5-10% of diluent; the component B comprises the following components: 30-40% of aqueous hydroxyl resin dispersoid, 15-20% of titanium dioxide, 6-10% of barium sulfate, 0.1-0.5% of bentonite, 3-6% of carbon nanotube dispersoid, 2-3% of organosiloxane, 2-5% of auxiliary agent and the balance of water; wherein the mass ratio of the component A to the component B is 1 (5-9). The self-cleaning tough glaze paint provided by the invention is cured into a film at room temperature, is environment-friendly, durable in service life and durable in renewal, effectively reduces the use cost of end users, and achieves the purposes of environmental protection, material saving and emission reduction.)

1. A self-cleaning tough glaze paint is characterized by comprising a component A and a component B which are calculated according to mass percentage,

the component A comprises the following components:

72-82% of hydrophilic aliphatic isocyanate

12 to 18 percent of isophorone diisocyanate

5-10% of a diluent;

the component B comprises the following components:

wherein the mass ratio of the component A to the component B is 1 (5-9).

2. A self-cleaning tough glaze paint according to claim 1 wherein in the a component, the hydrophilic aliphatic isocyanate is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate.

3. A self-cleaning tough glaze paint according to claim 1 or 2 wherein in the a component, the diluent is a dipropylene glycol dimethyl ether diluent.

4. A self-cleaning tough glaze paint according to any one of claims 1 to 3 wherein in the B component, the aqueous hydroxyl resin dispersion is a mixture of an aqueous hydroxyl acrylic dispersion and an aqueous hydroxyl polyurethane dispersion.

5. A self-cleaning tough glaze paint according to claim 4, wherein the mass ratio of the aqueous hydroxyl acrylic dispersion to the aqueous hydroxyl polyurethane dispersion is (10-15): (20-25).

6. A self-cleaning tough glaze paint according to any one of claims 1 to 5, wherein the auxiliary agent comprises the following components by mass percent 2-5% of the auxiliary agent:

7. a self-cleaning tough glaze paint according to claim 6 wherein the dispersant is a polyether copolymer dispersant;

preferably, the defoamer is a polysiloxane defoamer;

preferably, the rheology agent is a polyurethane rheology agent;

preferably, the leveling agent is a dimethyl silane leveling agent;

preferably, the light stabilizer includes a hindered amine light stabilizer and a benzotriazole light stabilizer;

preferably, the mass ratio of the hindered amine light stabilizer to the benzotriazole light stabilizer is 3:1-1: 3.

8. A process for the preparation of self-cleaning tough enamel paint according to any one of claims 1 to 7, characterized in that it comprises the following steps:

1) preparation of component A: weighing hydrophilic aliphatic isocyanate, isophorone diisocyanate and a diluent according to a ratio, and uniformly stirring and mixing to obtain the component A;

2) preparation of the component B:

weighing deionized water, bentonite, titanium dioxide, barium sulfate, a carbon nano tube dispersion, organosiloxane, a water-based hydroxyl resin dispersion and an auxiliary agent according to the proportion, and uniformly stirring and mixing to obtain a component B;

3) the component A and the component B are used in a matching way according to the mass ratio of 1 (5-9).

9. The method as claimed in claim 8, wherein the stirring speed in step 1) is 300-500rpm, and the stirring time is 20-40 min.

10. The preparation method according to claim 8 or 9, wherein in the step 2), the specific preparation process of the component B is as follows:

a) weighing deionized water according to the proportion, sequentially adding bentonite, polyether copolymer dispersant and polysiloxane defoamer, and dispersing for 15-30min at the stirring speed of 600-900rpm to obtain a mixed material;

b) sequentially adding titanium dioxide, barium sulfate and the carbon nano tube dispersoid into the mixed material obtained in the step a) according to the proportion, and dispersing for 30-40min at the stirring speed of 1000-1400 rpm;

c) sequentially weighing the aqueous hydroxyl acrylic acid dispersoid, the aqueous hydroxyl polyurethane dispersoid and the organosiloxane according to the proportion, and stirring at the stirring speed of 400-600rpm for 10-15min to obtain a premixed resin dispersoid;

d) adding the premixed resin dispersion obtained in the step c) into the material obtained in the step b), and dispersing for 15-20min at the stirring speed of 700-900 rpm;

e) and d), sequentially adding a polysiloxane antifoaming agent, a polyurethane rheological agent, a dimethyl silane leveling agent, a light stabilizer and an ultraviolet absorbent into the mixed material obtained in the step d), and dispersing at the stirring speed of 700-900rpm for 20-30min to obtain the component B.

Technical Field

The invention relates to the technical field of building facade decoration and protection materials, in particular to a self-cleaning tough glaze paint and a preparation method thereof.

Background

At present, the protective decorative materials on the surfaces of building outer walls and outdoor facilities are various and long in variety, and the main focus is on four aspects of water-based environmental protection, long service life, pollution resistance, self-cleaning and appearance effect. How to integrate the four main performance effects into a whole is an important direction for the technical progress of the outdoor surface protection and decoration material.

The self-cleaning tough glaze paint is an aqueous environment-friendly material, the coating has the advantages of flexibility, crack resistance, weather aging resistance, acid rain corrosion resistance, scratch resistance, pollution resistance and solvent resistance (can be easily cleaned like a glass curtain wall), the durability of the service life of the coating is ensured, the hydrophilicity of the coating is excellent and antistatic, the durable self-cleaning and refreshing of the surface is ensured, the cleaning necessity of the outer surface is greatly reduced, and the recoating is completely unnecessary.

CN104152005A discloses an antibacterial glaze finish, which is prepared by mixing a component A and a component B according to the mass ratio of 1: 5-9; wherein: the component A comprises: 62-92 parts by mass of acrylic epoxy resin; 5-16 parts by mass of an emulsifier; 2-7 parts by mass of a catalyst; 1-5 parts by mass of a surfactant; 0-10 parts by mass of a diluent; the component B comprises: 30-48 parts by mass of a water-based amine curing agent; 24-42 parts by mass of deionized water; 0.2-0.4 parts by mass of a dispersant; 1-4 parts by mass of a diluent; 0.2-0.6 parts by mass of a thixotropic agent; 18-27 parts by mass of extender pigment; 0.2-0.4 parts by mass of a leveling agent; 0.1-0.5 parts by mass of a surfactant; 0.1-0.6 parts by mass of nano titanium dioxide; 0.5-1.5 parts by mass of a silver ion antibacterial agent. The invention has the advantages of water-based environmental protection, strong adhesive force, solvent corrosion resistance, pollution resistance, self-cleaning property and outdoor aging resistance, and excellent antibacterial and anti-doodling performance, but the comprehensive performance of the invention needs to be further improved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a self-cleaning tough glaze paint and a preparation method thereof, the self-cleaning tough glaze paint is cured into a film at room temperature, and the coating is flexible, anti-cracking, anti-scratching, anti-pollution, chemical corrosion resistant and weather-proof, so that the durability of the coating is ensured; the surface hydrophilicity and the antistatic property are excellent, the coating is ensured to be durable, self-cleaning and refreshing, the use cost of an end user is effectively reduced, and the purposes of environmental protection, material saving and emission reduction are achieved.

One of the purposes of the invention is to provide a self-cleaning tough glaze paint, and in order to achieve the purpose, the invention adopts the following technical scheme:

a self-cleaning tough glaze paint comprises a component A and a component B, and the self-cleaning tough glaze paint comprises the components A and B by mass percent,

the component A comprises the following components:

72-82% of hydrophilic aliphatic isocyanate

12 to 18 percent of isophorone diisocyanate

5-10% of a diluent;

the component B comprises the following components:

wherein the mass ratio of the component A to the component B is 1 (5-9).

According to the self-cleaning tough glaze paint, the hydroxyl resin dispersion with excellent performance is selected to ensure that the coating is flexible, anti-cracking, has glaze texture and is excellent in durability; organic siloxane is added, and silanol groups hydrolyzed by alkoxy can seep out of the surface to improve the hydrophilicity of the surface of the coating, so that the rainwater self-cleaning property of the coating is greatly improved; the addition of the carbon nanotube dispersoid provides antistatic property for the coating, effectively reduces dust adhesion, finally endows the self-cleaning tough glaze coating with excellent and durable comprehensive performance, has the surface which is not easy to be stuck with dust and dirty, and is easy to be washed clean by rain even if a small amount of adhered substances exist.

The self-cleaning tough glaze paint provided by the invention is technically improved in three aspects of water-based environmental protection, long service life, pollution resistance and self-cleaning, and the finished appearance effect has glaze texture, so that a material with excellent comprehensive performance is provided for outdoor surface protection and decoration.

In particular to a self-cleaning tough glaze paint which comprises a component A and a component B, wherein the components A and B are calculated according to mass percentage,

the component A comprises the following components:

the hydrophilic aliphatic isocyanate is 72 to 82% by mass, for example, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, or 82%.

The mass percentage of isophorone diisocyanate is 12-18%, for example, 12%, 13%, 14%, 15%, 16%, 17%, 18%, or the like.

The diluent is 5 to 10% by mass, for example, 5%, 6%, 7%, 8%, 9%, 10%, or the like.

The component B comprises the following components:

the aqueous hydroxyl resin dispersion may be 30 to 40% by mass, for example, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, or the like.

The titanium dioxide is 15-20% by mass, for example, 15%, 16%, 17%, 18%, 19%, 20%, or the like.

The barium sulfate is 6 to 10 mass%, for example, 6%, 7%, 8%, 9%, 10%, or the like.

The bentonite is 0.1-0.5% by mass, for example, 0.1%, 0.2%, 0.3%, 0.4%, or 0.5%.

The mass percentage of the carbon nanotube dispersion is 3 to 6%, for example, 3%, 4%, 5%, or 6%.

The mass percentage of the organosiloxane is 2 to 3%, for example, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, or 3%.

The mass percent of the auxiliary agent is 2-5%, for example, 2%, 3%, 4% or 5%.

The balance of water.

Wherein the mass ratio of the component A to the component B is 1 (5-9), such as 1:5, 1:6, 1:7, 1:8 or 1: 9.

In the component A, the hydrophilic aliphatic isocyanate is hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate.

In the component A, the diluent is a dipropylene glycol dimethyl ether diluent.

In the component B, the aqueous hydroxyl resin dispersion is a mixture of an aqueous hydroxyl acrylic dispersion and an aqueous hydroxyl polyurethane dispersion.

The mass ratio of the aqueous hydroxyl acrylic acid dispersoid to the aqueous hydroxyl polyurethane dispersoid is (10-15) to (20-25).

The auxiliary agent comprises the following components in percentage by mass 2-5 percent:

the dispersant is 0.6 to 1% by mass, for example, 0.6%, 0.7%, 0.8%, 0.9%, or 1%.

The defoaming agent is 0.5 to 0.8% by mass, for example, 0.5%, 0.6%, 0.7%, or 0.8%.

The mass percentage of the rheological agent is 1 to 2%, for example, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2%.

The mass percent of the leveling agent is 0.3-0.8%, for example, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or 0.8%.

The light stabilizer is 0.1 to 0.3% by mass, for example, 0.1%, 0.2%, or 0.3%.

The ultraviolet absorber is 0.1-0.3% by mass, for example, 0.1%, 0.2%, 0.3%, etc.

In the invention, the dispersant is a polyether copolymer dispersant.

Preferably, the defoamer is a silicone defoamer.

Preferably, the rheology agent is a polyurethane rheology agent.

Preferably, the leveling agent is a dimethylsilane leveling agent.

Preferably, the light stabilizer includes a hindered amine light stabilizer and a benzotriazole light stabilizer;

preferably, the mass ratio of the hindered amine light stabilizer to the benzotriazole light stabilizer is 3:1-1: 3.

The second purpose of the invention is to provide a preparation method of the self-cleaning tough glaze paint, which comprises the following steps:

1) preparation of component A: weighing hydrophilic aliphatic isocyanate, isophorone diisocyanate and a diluent according to a ratio, and uniformly stirring and mixing to obtain the component A;

2) preparation of the component B:

weighing deionized water, bentonite, titanium dioxide, barium sulfate, a carbon nano tube dispersion, organosiloxane, a water-based hydroxyl resin dispersion and an auxiliary agent according to the proportion, and uniformly stirring and mixing to obtain a component B;

3) the component A and the component B are used in a matching way according to the mass ratio of 1 (5-9).

In the step 1), the stirring speed is 300-500rpm, and the stirring time is 20-40 min.

In the step 2), the specific preparation process of the component B comprises the following steps:

a) weighing deionized water according to the proportion, sequentially adding bentonite, polyether copolymer dispersant and polysiloxane defoamer, and dispersing for 15-30min at the stirring speed of 600-900rpm to obtain a mixed material;

b) sequentially adding titanium dioxide, barium sulfate and the carbon nano tube dispersoid into the mixed material obtained in the step a) according to the proportion, and dispersing for 30-40min at the stirring speed of 1000-1400 rpm;

c) sequentially weighing the aqueous hydroxyl acrylic acid dispersoid, the aqueous hydroxyl polyurethane dispersoid and the organosiloxane according to the proportion, and stirring at the stirring speed of 400-600rpm for 10-15min to obtain a premixed resin dispersoid;

d) adding the premixed resin dispersion obtained in the step c) into the material obtained in the step b), and dispersing for 15-20min at the stirring speed of 700-900 rpm;

e) and d), sequentially adding a polysiloxane antifoaming agent, a polyurethane rheological agent, a dimethyl silane leveling agent, a light stabilizer and an ultraviolet absorbent into the mixed material obtained in the step d), and dispersing at the stirring speed of 700-900rpm for 20-30min to obtain the component B.

Compared with the prior art, the invention has the beneficial effects that:

the self-cleaning tough glaze paint can be used as a high-performance protective decorative material for the surfaces of building outer walls and outdoor facilities, and the coating is flexible, anti-cracking, anti-scratching, anti-pollution, chemical corrosion resistant and weather-proof aging resistant, so that the durability of the coating is ensured; the surface hydrophilicity and the antistatic property are excellent, and the lasting self-cleaning and refreshing of the coating are ensured; the self-cleaning tough glaze paint provided by the invention is cured into a film at room temperature, is environment-friendly, durable in service life and durable in renewal, effectively reduces the use cost of end users, and achieves the purposes of environmental protection, material saving and emission reduction.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments.

Unless otherwise specified, various starting materials of the present invention are commercially available or prepared according to conventional methods in the art.

Example 1

The self-cleaning tough glaze paint of the embodiment comprises a component A and a component B, and the self-cleaning tough glaze paint comprises the components A and B by mass percent,

the component A consists of 82 percent of XP2487 hydrophilic aliphatic isocyanate, 12 percent of XP2759 isophorone diisocyanate and 6 percent of DMM diluent;

the component B consists of 10 percent of A2695 aqueous hydroxyl acrylic acid dispersoid, 20 percent of U2750 aqueous hydroxyl polyurethane dispersoid, 32 percent of deionized water, 15 percent of titanium dioxide, 10 percent of barium sulfate, 0.5 percent of bentonite, 3 percent of Z6911 organosiloxane, 6 percent of carbon nano tube dispersoid, 0.8 percent of FX365 polyether copolymer dispersant, 0.5 percent of TEGO845 polysiloxane defoaming agent, 1.6 percent of HX6008 polyurethane rheological agent, 0.3 percent of FS444 dimethyl silane leveling agent, 0.1 percent of TINUVINS 292 light stabilizer and 0.2 percent of TINUVINS 1130 ultraviolet absorbent;

wherein the mass ratio of the component A to the component B is 1: 7.

The preparation method of the self-cleaning tough glaze paint comprises the following steps:

1) preparation of component A: weighing hydrophilic aliphatic isocyanate, isophorone diisocyanate and a diluent according to a ratio, stirring at 400rpm for 30min, and uniformly mixing to obtain a component A;

2) preparation of the component B:

a) weighing deionized water according to a ratio, sequentially adding bentonite, a polyether copolymer dispersant and a polysiloxane defoamer, and dispersing at a stirring speed of 800rpm for 20min to obtain a mixed material;

b) sequentially adding titanium dioxide, barium sulfate and the carbon nano tube dispersoid into the mixed material obtained in the step a) according to the proportion, and dispersing for 35min at the stirring speed of 1200 rpm;

c) sequentially weighing the aqueous hydroxyl acrylic acid dispersoid, the aqueous hydroxyl polyurethane dispersoid and the organic siloxane according to the proportion, and stirring at the stirring speed of 500rpm for 10min to obtain a premixed resin dispersoid;

d) adding the premixed resin dispersoid obtained in the step c) into the material obtained in the step b), and dispersing for 18min at the stirring speed of 800 rpm;

e) sequentially adding a polysiloxane antifoaming agent, a polyurethane rheological agent, a dimethyl silane leveling agent, a light stabilizer and an ultraviolet absorbent into the mixed material obtained in the step d), and dispersing at the stirring speed of 800rpm for 25min to obtain a component B;

3) the component A and the component B are used in a matching way according to the mass ratio of 1: 7.

Example 2

This example is different from example 1 in that the mass ratio of the A component to the B component is 1:5, and the others are the same as those of example 1.

Example 3

This example is different from example 1 in that the mass ratio of the A component to the B component is 1:9, and the others are the same as those of example 1.

Example 4

The self-cleaning tough glaze paint of the embodiment comprises a component A and a component B, and the self-cleaning tough glaze paint comprises the components A and B by mass percent,

the component A consists of 80% of XP2487 hydrophilic aliphatic isocyanate, 15% of XP2759 isophorone diisocyanate and 10% of DMM diluent;

the component B consists of 12 percent of A2695 aqueous hydroxyl acrylic acid dispersoid, 23 percent of U2750 aqueous hydroxyl polyurethane dispersoid, 28.4 percent of deionized water, 17 percent of titanium dioxide, 8 percent of barium sulfate, 0.3 percent of bentonite, 2.5 percent of Z6911 organosiloxane, 4 percent of carbon nano tube dispersoid, 1 percent of FX365 polyether copolymer dispersant, 0.7 percent of TEGO845 polysiloxane antifoaming agent, 2 percent of HX6008 polyurethane rheological agent, 0.8 percent of FS444 dimethyl silane leveling agent, 0.2 percent of TINUVINS 292 light stabilizer and 0.1 percent of TINUVINS 1130 ultraviolet absorbent;

wherein the mass ratio of the component A to the component B is 1: 9.

The preparation method of the self-cleaning tough glaze paint comprises the following steps:

1) preparation of component A: weighing hydrophilic aliphatic isocyanate, isophorone diisocyanate and a diluent according to a ratio, stirring at 400rpm for 30min, and uniformly mixing to obtain a component A;

2) preparation of the component B:

a) weighing deionized water according to a ratio, sequentially adding bentonite, a polyether copolymer dispersant and a polysiloxane defoamer, and dispersing at a stirring speed of 800rpm for 20min to obtain a mixed material;

b) sequentially adding titanium dioxide, barium sulfate and the carbon nano tube dispersoid into the mixed material obtained in the step a) according to the proportion, and dispersing for 35min at the stirring speed of 1200 rpm;

c) sequentially weighing the aqueous hydroxyl acrylic acid dispersoid, the aqueous hydroxyl polyurethane dispersoid and the organic siloxane according to the proportion, and stirring at the stirring speed of 500rpm for 10min to obtain a premixed resin dispersoid;

d) adding the premixed resin dispersoid obtained in the step c) into the material obtained in the step b), and dispersing for 18min at the stirring speed of 800 rpm;

e) sequentially adding a polysiloxane antifoaming agent, a polyurethane rheological agent, a dimethyl silane leveling agent, a light stabilizer and an ultraviolet absorbent into the mixed material obtained in the step d), and dispersing at the stirring speed of 800rpm for 25min to obtain a component B;

3) the component A and the component B are used in a matching way according to the mass ratio of 1: 9.

Example 5

The self-cleaning tough glaze paint of the embodiment comprises a component A and a component B, and the self-cleaning tough glaze paint comprises the components A and B by mass percent,

the component A consists of 72 percent of XP2487 hydrophilic aliphatic isocyanate, 18 percent of XP2759 isophorone diisocyanate and 10 percent of DMM diluent;

the component B consists of 15 percent of A2695 aqueous hydroxyl acrylic acid dispersoid, 25 percent of U2750 aqueous hydroxyl polyurethane dispersoid, 25.4 percent of deionized water, 20 percent of titanium dioxide, 6 percent of barium sulfate, 0.1 percent of bentonite, 2 percent of Z6911 organosiloxane, 3 percent of carbon nano tube dispersoid, 0.6 percent of FX365 polyether copolymer dispersant, 0.8 percent of TEGO845 polysiloxane antifoaming agent, 1 percent of HX6008 polyurethane rheological agent, 0.5 percent of FS444 dimethylsilane leveling agent, 0.3 percent of TINUVINS 292 light stabilizer and 0.3 percent of TINUVINS 1130 ultraviolet absorbent;

wherein the mass ratio of the component A to the component B is 1: 9.

The preparation method of the self-cleaning tough glaze paint comprises the following steps:

1) preparation of component A: weighing hydrophilic aliphatic isocyanate, isophorone diisocyanate and a diluent according to a ratio, stirring at 400rpm for 30min, and uniformly mixing to obtain a component A;

2) preparation of the component B:

a) weighing deionized water according to a ratio, sequentially adding bentonite, a polyether copolymer dispersant and a polysiloxane defoamer, and dispersing at a stirring speed of 800rpm for 20min to obtain a mixed material;

b) sequentially adding titanium dioxide, barium sulfate and the carbon nano tube dispersoid into the mixed material obtained in the step a) according to the proportion, and dispersing for 35min at the stirring speed of 1200 rpm;

c) sequentially weighing the aqueous hydroxyl acrylic acid dispersoid, the aqueous hydroxyl polyurethane dispersoid and the organic siloxane according to the proportion, and stirring at the stirring speed of 500rpm for 10min to obtain a premixed resin dispersoid;

d) adding the premixed resin dispersoid obtained in the step c) into the material obtained in the step b), and dispersing for 18min at the stirring speed of 800 rpm;

e) sequentially adding a polysiloxane antifoaming agent, a polyurethane rheological agent, a dimethyl silane leveling agent, a light stabilizer and an ultraviolet absorbent into the mixed material obtained in the step d), and dispersing at the stirring speed of 800rpm for 25min to obtain a component B;

3) the component A and the component B are used in a matching way according to the mass ratio of 1: 9.

Comparative example 1

This comparative example differs from example 1 in that the mass ratio of the A component to the B component was 1:3, and the others were the same as those of example 1.

Comparative example 2

This comparative example differs from example 1 in that the mass ratio of the A component to the B component was 1:12, and the others were the same as those of example 1.

Comparative example 3

This comparative example differs from example 1 in that the dispersion in component B is an aqueous hydroxyl acrylic dispersion only, and does not contain an aqueous hydroxyl polyurethane dispersion, and a reduced amount of the aqueous hydroxyl polyurethane dispersion is added to the aqueous hydroxyl acrylic dispersion to ensure that the total amount is unchanged, all else being the same as in example 1.

Comparative example 4

This comparative example differs from example 1 in that the dispersion in component B is an aqueous hydroxyl polyurethane dispersion only, and does not contain an aqueous hydroxyl acrylic dispersion, and a reduced amount of aqueous hydroxyl acrylic dispersion is added to the aqueous hydroxyl polyurethane dispersion to ensure that the total amount is unchanged, all else being the same as in example 1.

Comparative example 5

This comparative example differs from example 1 in that the B component, which does not contain a carbon nanotube dispersion, has a reduced carbon nanotube dispersion added on average to the other components to ensure a constant total amount, all otherwise being the same as example 1.

Comparative example 6

This comparative example is different from example 1 in that the carbon nanotube dispersion in the B component is replaced with conductive mica powder, and the others are the same as those of example 1.

Comparative example 7

This comparative example differs from example 1 in that in the B component, no organosiloxane is present and the reduced organosiloxane is added on average to the other components to ensure the total amount is unchanged, all else being identical to example 1.

Comparative example 8

This comparative example differs from example 1 in that the isocyanate resin is only a hydrophilic aliphatic isocyanate, and the rest is the same as example 1.

Comparative example 9

This comparative example differs from example 1 in that the isocyanate resin is only an isophorone diisocyanate and is otherwise the same as example 1.

The self-cleaning tough glaze paint prepared in the examples 1 to 5 and the material prepared in the comparative examples 1 to 9 were subjected to the performance test, and the test results are shown in table 1.

The test standard of the VOC content of the environmental performance index refers to GB 18582-2008; in physicochemical performance indexes, the test standard of the hardness of the coating pencil refers to GB/T6739-.

TABLE 1

As can be seen from Table 1, in examples 1 to 5, the self-cleaning tough glaze paint of the present invention is excellent in comprehensive properties, and the coating obtained by the self-cleaning tough glaze paint has a surface hardness of H-2H, stain resistance, solvent wiping resistance, acid resistance, water resistance, and a surface resistance of 10⁸-10¹⁰And excellent weather resistance and the like.

In comparative example 1, too large a mass ratio of the component a to the component B lowers the surface hardness of the coating film, and the stain resistance, and solvent wiping resistance are lowered, failing to satisfy the requirements.

In comparative example 2, when the mass ratio of the component a to the component B is too small, the surface hardness of the coating film is lowered, and the properties such as stain resistance, solvent wiping resistance and the like are greatly lowered, and the requirements cannot be satisfied.

In comparative example 3, the dispersion of component B is only an aqueous hydroxy acrylic dispersion, and does not contain an aqueous hydroxy polyurethane dispersion, so that the flexibility and crack resistance of the coating film are deteriorated, and the aging resistance is greatly reduced.

In comparative example 4, the dispersion of component B is an aqueous hydroxyl polyurethane dispersion only, and does not contain an aqueous hydroxyl acrylic dispersion, which causes the coating film to have reduced properties such as stain resistance, solvent wiping resistance, and acid resistance.

Comparative example 5, which does not contain the carbon nanotube dispersion, increases the surface resistance of the coating film and makes the surface of the coating film easily dirty.

The carbon nanotubes in comparative example 6 were completely replaced with conductive mica powder, ensuring a surface resistance of 10⁹Under the condition of (1), the viscosity of the coating is too high, the color of the coating is too dark gray, and the color cannot be easily adjusted.

The absence of organosiloxane in comparative example 7 increased the water contact angle of the coated surface, decreased the surface hydrophilicity, and resulted in a significant decrease in stain resistance.

Comparative example 8 the isocyanate resin was only one hydrophilic aliphatic isocyanate, which resulted in too high a coating mix viscosity for easy application operations.

Comparative example 9 the isocyanate resin was only one kind of isophorone diisocyanate, and the compatibility of mixing the components A and B was poor, and the coating film was incomplete.

The present invention is illustrated by the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed process equipment and process flow, i.e. it is not meant to imply that the present invention must rely on the above-mentioned detailed process equipment and process flow to be practiced. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.