CN111454620A

CN111454620A - High-performance heat-insulation fluorocarbon paint and preparation process thereof

Info

Publication number: CN111454620A
Application number: CN202010282190.6A
Authority: CN
Inventors: 孟奎; 孟运; 张强国; 毛现东; 王俞江
Original assignee: Hubao New Material Technology Shanghai Co ltd
Current assignee: Hubao New Material Technology Shanghai Co ltd
Priority date: 2020-04-11
Filing date: 2020-04-11
Publication date: 2020-07-28

Abstract

The invention discloses a high-performance heat-insulation fluorocarbon paint which comprises 45-60 parts of fluorocarbon resin, 3-8 parts of titanium dioxide, 20-30 parts of functional filler, 0-15 parts of heat-preservation filler, 1-1.5 parts of ethylene glycol, 0.3-0.5 part of alkali swelling thickener, 0.2-0.3 part of defoamer, 0.3-0.5 part of flatting agent, 0.4-0.8 part of dispersant, 1.5-3.5 parts of film-forming additive and 25-40 parts of deionized water. The invention also discloses a preparation process of the high-performance heat-insulation fluorocarbon paint, which can prepare the fluorocarbon paint with high stability and proper viscosity.

Description

High-performance heat-insulation fluorocarbon paint and preparation process thereof

Technical Field

The invention relates to the technical field of fluorocarbon paint, in particular to high-performance heat-insulation fluorocarbon paint and a preparation process thereof.

Background

Fluorocarbon paint refers to paint using fluororesin as a main film forming substance, and is also called fluorocarbon paint, fluorine paint, fluororesin paint and the like. Among various coatings, the fluorocarbon paint has high electronegativity of introduced fluorine elements, strong fluorocarbon bond energy, excellent weather resistance, heat resistance, low temperature resistance and chemical resistance, and unique non-adhesiveness and low friction. After decades of rapid development, fluorocarbon paint is widely applied in various fields such as buildings, chemical industry, electrical and electronic industry, mechanical industry, aerospace industry, household articles and the like, and becomes a paint brand with the highest comprehensive performance after being used as high-performance paint such as acrylic paint, polyurethane paint, organic silicon paint and the like.

In the field of construction, especially in the construction of houses and bridges, steel structures are used in large quantities. The steel structure is in the open air for a long time and is attacked by sunshine and acid rain, so fluorocarbon paint is often needed to improve the self corrosion resistance and durability, and the purpose of prolonging the service life is achieved.

The application document of the Chinese invention patent with the publication number of CN103965708A discloses a fluorocarbon finish and a preparation method thereof, wherein the fluorocarbon finish is prepared from the following raw materials in parts by weight: 21-24 parts of PVDF fluorocarbon resin, 20-24 parts of 40% thermoplastic acrylic resin, 13-18 parts of xylene, 8-15 parts of butyl acetate, 20-25 parts of rutile titanium dioxide and 0.5-1 part of leveling auxiliary agent. The preparation method comprises the following steps: firstly, adding all PVDF fluorocarbon resin, 40% thermoplastic acrylic resin, butyl acetate and a part of xylene into a stirrer, and stirring for a period of time at a medium speed; keeping the rotating speed unchanged, adding the rutile titanium dioxide, the leveling assistant and the rest dimethylbenzene, and stirring for a period of time at a high speed; and grinding the stirred material.

In the invention patent, the preparation method of the fluorocarbon finish paint can be carried out at normal temperature, is convenient and simple, is easy to operate, and the produced fluorocarbon finish paint product has super-strong acid resistance, alkali resistance and weather resistance, is easy to clean and maintain, and can be matched with corresponding primer to protect a steel structure in outdoor environment for a long time in building engineering. However, PVDF fluorocarbon resin is an ultraviolet-transparent resin, and external light easily penetrates through the fluorocarbon top coat to irradiate the primer, so that the temperature of the primer is raised and decomposed, and further the whole coating is easily damaged, and the steel structure is corroded and aged. In addition, 20-25% of rutile type titanium dioxide is added in the formula of the paint, and the rutile type titanium dioxide as a pigment and filler has the function of reflecting light, but the thermal conductivity of the rutile type titanium dioxide is relatively high, so that the thermal insulation capability of the finish paint is reduced, the thermal conductivity is increased when the rutile type titanium dioxide is added into the finish paint in a large amount, and the aging of a primer or a very-thin steel structure is also accelerated. Therefore, a high-performance heat-insulating fluorocarbon paint and a preparation process thereof need to be provided.

Disclosure of Invention

Aiming at the defects in the prior art, the first object of the invention is to provide a high-performance heat-insulating fluorocarbon paint which has good heat-insulating performance.

In order to achieve the first object, the invention provides the following technical scheme:

the high-performance heat-insulation fluorocarbon paint is prepared from the following components in parts by weight:

the functional filler comprises ceramic microspheres and barite powder.

By adopting the technical scheme, the titanium dioxide and the functional filler formed by mixing the ceramic microspheres and the barite powder are added into the high-performance heat-insulation fluorocarbon paint, the titanium dioxide and the ceramic microspheres are both reflective materials, and the titanium dioxide and the ceramic microspheres are added into the formula of the paint and serve as pigments and aggregates, so that a paint film is endowed with a better whitening and shading effect, the light transmittance of the paint is reduced, the heat energy of solar radiation can be reflected, the energy absorbed by the paint film is reduced, and the purpose of blocking heat from being conducted through the paint film is achieved. The shorter the wavelength, the stronger the light penetrability, the barite powder can absorb low-wavelength rays, and when added into the system disclosed by the invention, the barite powder can be matched with titanium dioxide and ceramic microspheres to absorb low-wavelength rays which are not reflected by the titanium dioxide and the ceramic microspheres, so that the low-wavelength rays are prevented from directly permeating a paint film and converging on a primer to raise the temperature of the primer. Meanwhile, the heat-insulating filler is added in the invention, the heat-insulating filler has low heat conductivity coefficient, heat is blocked from being conducted through a paint film by forming heat bridges through uniform distribution in the paint film, and the heat-insulating property of the fluorocarbon paint is improved by the synergistic effect of the heat-insulating filler, the titanium dioxide and the functional filler.

Further, the high-performance heat-insulation fluorocarbon paint is prepared from the following components in parts by weight: 50-55 parts of fluorocarbon resin, 4.5-6 parts of titanium dioxide, 25-30 parts of functional filler, 10-15 parts of heat-insulating filler, 1.2-1.5 parts of ethylene glycol, 0.3-0.5 part of alkali swelling thickener, 0.25-0.3 part of defoamer, 0.4-0.5 part of flatting agent, 0.6-0.8 part of dispersant, 1.8-2.5 parts of film-forming assistant and 30-40 parts of deionized water.

By adopting the technical scheme, the content of each component in the formula is further optimized so as to achieve better heat insulation performance.

Further, the amount of the titanium dioxide is 4.5-5 parts.

By adopting the technical scheme, the titanium dioxide is used as the pigment and filler in the formula of the invention to play a role in shielding; as a reflective insulation component, the thermal insulation performance of the invention is improved; however, titanium dioxide is white powder, and has high thermal conductivity coefficient compared with functional fillers and heat-insulating fillers; the shielding effect and the heat insulation performance can be reduced when the content of the titanium dioxide is too small, the heat conduction capability of the paint film can be improved when the content of the titanium dioxide is too large, and the paint film can be ensured to have better heat insulation performance by controlling the content of the titanium dioxide in the system to be 4.5-5 parts.

Further, the weight ratio of the ceramic beads to the barite powder is (1:0.2) - (1: 0.13).

By adopting the technical scheme, the ceramic microspheres do not absorb various liquid and solid media in the system, can reflect 80-90% of solar radiation heat energy, and are matched with titanium dioxide to reflect light rays irradiating the surface of a paint film, so that the heat insulation performance of the paint is improved. The barite powder can absorb light with low wavelength and convert the absorbed light energy into heat energy so as to achieve the effect of preventing the heat energy from penetrating through the paint film. The weight ratio of the ceramic microspheres to the barite powder is controlled to be (1:0.2) - (1:0.13), so that the barite powder can absorb rays penetrating through the glass microspheres to enter a paint film, and the condition that the temperature of the paint film is too high due to too much content of the barite powder is avoided.

Further, the ceramic microspheres are hollow ceramic microspheres with the particle size of 20-45-ground.

By adopting the technical scheme, the hollow ceramic microspheres are glass bodies which are hollow inside, smooth and hard in surface and compact in structure, and have the characteristics of low density, small heat conductivity coefficient and excellent heat insulation performance.

Further, the barite powder is high-fine white barite powder.

By adopting the technical scheme, the barite powder is high-fineness and white barite powder which has the capability of absorbing low-wavelength rays, and when the barite powder is added into the formula disclosed by the invention, a paint film formed by the invention has strong capabilities of blocking and absorbing light rays. Compared with the traditional barite powder, the high-fineness barite powder has fine granularity and high whiteness, and plays the role of a pigment and a filler when being added into the formula of the invention, and is matched with titanium dioxide to reduce the light transmittance of a paint film. And the high-fine-white barite powder has large specific surface area, the capability of absorbing rays is improved, and the heat insulation capability of a paint film is further enhanced.

Further, the heat-insulating filler is one or more of heavy calcium carbonate, fly ash powder and quartz sand.

By adopting the technical scheme, the heat-insulating filler is one or more of the heavy calcium, the fly ash and the quartz sand, the heat conductivity coefficients of the heavy calcium, the fly ash and the quartz sand are low, and the single or multiple components are mixed and added in the formula of the paint disclosed by the invention, so that the overall heat conductivity coefficient of the paint disclosed by the invention can be reduced, and the heat-insulating property of the paint disclosed by the invention is improved.

The second purpose of the invention is to provide a preparation process of the high-performance heat-insulation fluorocarbon paint, the high-performance heat-insulation fluorocarbon paint prepared by the preparation process has uniform texture and high stability, and a paint film with excellent heat-insulation performance can be formed after the paint is smeared.

In order to achieve the second object, the invention provides the following technical scheme:

a preparation process of high-performance heat-insulation fluorocarbon paint comprises the following steps:

s1, weighing the raw materials according to the parts by weight for later use;

s2, dividing the dispersing agent into two parts, namely a dispersing agent A and a dispersing agent B, wherein the weight of the dispersing agent A is 25-40% of the total weight of the dispersing agent, and the weight of the dispersing agent B is 60-75% of the total weight of the dispersing agent for later use;

s3, sequentially adding the dispersant A, the defoaming agent and the alkali swelling thickener into 40% of deionized water at the rotating speed of 500-700 r/min, and uniformly mixing to prepare a mixed solution a for later use;

s4, adding fluorocarbon resin, ethylene glycol, a film forming aid, a flatting agent and the residual 60% of deionized water into the mixed solution a, uniformly mixing, increasing the rotation speed to 600-800 r/min at the later stage, and dispersing for 25-40 minutes to prepare a mixed material b;

s5, sequentially adding the dispersing agent B, the heat preservation filler, the titanium dioxide and the functional filler into the mixture B, continuously stirring the mixture B in the adding process, controlling the stirring speed to be 1000-1200 r/min, and continuously stirring for 15-20 min after the adding is finished;

and S7, standing the mixture b subjected to the operation for 4-7 minutes, and filtering by using a 150-mesh filter screen to obtain the high-performance heat-insulation fluorocarbon paint.

By adopting the technical scheme, the fluorocarbon paint with high stability and proper viscosity can be prepared by the preparation process of the fluorocarbon paint, and the heat-preservation filler, the titanium pigment and the functional filler are uniformly dispersed in the whole system by adding the dispersing agent in batches, so that a paint film formed by smearing the fluorocarbon paint has uniform texture and excellent heat-insulating property.

In conclusion, the invention has the following beneficial effects:

firstly, titanium dioxide and a functional filler formed by mixing ceramic microspheres and barite powder are added into the high-performance heat-insulation fluorocarbon paint, and the titanium dioxide and the ceramic microspheres are both reflective materials, so that a paint film is endowed with a better whitening and shading effect, the light transmittance of the paint is reduced, and the energy absorbed by the paint film can be reduced by reflecting solar radiation heat energy, so that the purpose of blocking heat from being conducted through the paint film is achieved;

secondly, the barite powder can be matched with the titanium dioxide and the ceramic microspheres to absorb low-wavelength light which is not reflected by the titanium dioxide and the ceramic microspheres, so that the low-wavelength light is prevented from directly permeating a paint film to be converged on the primer to raise the temperature of the primer;

thirdly, the heat-insulating filler is added, so that the heat-insulating filler has low heat conductivity coefficient and can form a thermal bridge to prevent heat from being conducted through a paint film;

fourthly, the fluorocarbon paint with high stability and proper viscosity can be prepared by the preparation process of the fluorocarbon paint, and the heat-preservation filler, the titanium pigment and the functional filler are uniformly dispersed in the whole system by adding the dispersing agent in batches, so that the paint film formed by smearing the fluorocarbon paint has uniform texture.

Detailed Description

The present invention will be described in further detail with reference to examples.

Example 1

The high-performance heat-insulation fluorocarbon paint is prepared from the following components in parts by weight: the production process comprises the following steps of 45 kg of PVDF fluorocarbon resin FK-2, 3 kg of rutile type titanium dioxide R-900, 20 kg of functional filler, 15 kg of heat preservation filler, 1 kg of ethylene glycol, 0.5 kg of alkali swelling thickener ASE60, 0.2 kg of polyether organic silicon defoamer SH-D120, 0.3 kg of leveling agent RM-2020, 0.4 kg of dispersant AM-C, 1.5 kg of trimethylpentanediol monoisobutyrate and 25 kg of deionized water, and the composition is as shown in Table 1;

the functional filler is formed by mixing ceramic microspheres and high-fine barite powder in a weight ratio of 1:0.2, wherein the ceramic microspheres are hollow ceramic microspheres with the screened particle size of 20-45 and high; the heat preservation filler is prepared from the following components in percentage by weight of 1: 1: 1, and the coarse whiting, the fly ash powder and the quartz sand are mixed.

Preparing high-performance heat-insulating fluorocarbon paint:

1) dividing a dispersant AM-C into two parts, namely a dispersant A and a dispersant B, wherein the weight of the dispersant A is 25% of the total weight of the dispersant, and the weight of the dispersant B is 75% of the total weight of the dispersant, and keeping the dispersant A and the dispersant B in reserve;

2) adding 40% of deionized water into a stirrer, controlling the rotating speed to be 500r/min, sequentially adding a polyether organic silicon defoamer SH-D120 and a dispersant A into the 40% of deionized water, and stirring for 10min to prepare a mixed solution a for later use;

3) starting a stirrer, controlling the rotating speed to be 500r/min, adding PVDF fluorocarbon resin FK-2, ethylene glycol, trimethylpentanediol monoisobutyrate, a leveling agent RM-2020 and the residual 60% of deionized water into the mixed solution a, continuously stirring for 6 minutes, then increasing the rotating speed to 600r/min, and dispersing for 19 minutes to prepare a mixed material b;

4) adding the dispersant B, the heat-preservation filler, the rutile titanium dioxide R-900 and the functional filler into the mixture B in sequence, continuously stirring the mixture B in the adding process, controlling the stirring speed to be 1000R/min, and continuously stirring for 15min after the adding is finished to obtain a mixture c;

5) and standing the mixture b subjected to the operation for 4 minutes, and filtering by using a 150-mesh filter screen to obtain the high-performance heat-insulating fluorocarbon paint.

Example 2

The components and the contents of the components of the example 2 are the same as those of the example 1, except that the process parameters are set differently in the preparation process, and the components are referred to in the table 1.

Preparing high-performance heat-insulating fluorocarbon paint:

2) adding 40% of deionized water into a stirrer, controlling the rotating speed to be 600r/min, sequentially adding a polyether organic silicon defoamer SH-D120 and a dispersant A into the 40% of deionized water, and stirring for 10min to prepare a mixed solution a for later use;

3) starting a stirrer, controlling the rotating speed to be 600r/min, adding PVDF fluorocarbon resin FK-2, ethylene glycol, trimethylpentanediol monoisobutyrate, a leveling agent RM-2020 and the residual 60% of deionized water into the mixed solution a, continuously stirring for 8 minutes, then increasing the rotating speed to 700r/min, and dispersing for 22 minutes to prepare a mixed material b;

4) adding the dispersant B, the heat-preservation filler, the rutile titanium dioxide R-900 and the functional filler into the mixture B in sequence, continuously stirring the mixture B in the adding process, controlling the stirring speed to be 1100R/min, and continuously stirring for 18min after the adding is finished to obtain a mixture c;

5) and standing the mixture c subjected to the operation for 5 minutes, and filtering by using a 150-mesh filter screen to obtain the high-performance heat-insulation fluorocarbon paint.

Example 3

Example 3 the components and the contents of the components are the same as those of example 1, except that the process parameters are set differently during the preparation process, and the components are referred to table 1.

Preparing high-performance heat-insulating fluorocarbon paint:

2) adding 40% of deionized water into a stirrer, controlling the rotating speed to be 700r/min, sequentially adding a polyether organic silicon defoamer SH-D120 and a dispersant A into the 40% of deionized water, and stirring for 10min to prepare a mixed solution a for later use;

3) starting a stirrer, controlling the rotating speed to be 700r/min, adding PVDF fluorocarbon resin FK-2, ethylene glycol, trimethylpentanediol monoisobutyrate, a leveling agent RM-2020 and the residual 60% of deionized water into the mixed solution a, continuously stirring for 15 minutes, then increasing the rotating speed to be 800r/min, and dispersing for 25 minutes to prepare a mixed material b;

4) adding the dispersant B, the heat-preservation filler, the rutile titanium dioxide R-900 and the functional filler into the mixture B in sequence, continuously stirring the mixture B in the adding process, controlling the stirring speed to be 1200R/min, and continuously stirring for 20min after the adding is finished to obtain a mixture c;

5) and standing the mixture c subjected to the operation for 7 minutes, and filtering by using a 150-mesh filter screen to obtain the high-performance heat-insulation fluorocarbon paint.

Example 4

Example 4 the components, the contents of the components and the preparation process were the same as those of example 3, except that the weight of the dispersant A was 30% of the total weight of the dispersant AM-C and the weight of the dispersant B was 70% of the total weight of the dispersant AM-C during the preparation, and the components were as shown in Table 1.

Example 5

The components, the contents of the components and the preparation process of the embodiment 5 are the same as those of the embodiment 3, except that the amount of the dispersant A is 40% of the total weight of the dispersant, the dispersant B is 60% of the total weight of the dispersant, and the components are shown in the table 1.

Example 6

The high-performance heat-insulation fluorocarbon paint is prepared from the following components in parts by weight: 50 kg of PVDF fluorocarbon resin FK-2, 4.5 kg of rutile type titanium dioxide R-900, 25 kg of functional filler, 13 kg of heat preservation filler, 1.1 kg of ethylene glycol, 0.45 kg of alkali swelling thickener ASE60, 0.23 kg of polyether organic silicon defoamer SH-D120, 0.35 kg of leveling agent RM-2020, 0.5 kg of dispersant AM-C, 1.8 kg of trimethyl pentanediol monoisobutyrate, and 30 kg of deionized water, wherein the components are as shown in Table 1;

the functional filler is formed by mixing ceramic microspheres and high-fine barite powder in a weight ratio of 1:0.18, wherein the ceramic microspheres are hollow ceramic microspheres with the particle size of 20-45 mu m after screening; the heat preservation filler is prepared from the following components in percentage by weight of 1: 1 and fly ash powder.

Preparing high-performance heat-insulating fluorocarbon paint:

1) dividing a dispersant AM-C into two parts, namely a dispersant A and a dispersant B, wherein the weight of the dispersant A is 30% of the total weight of the dispersant, and the weight of the dispersant B is 70% of the total weight of the dispersant, and keeping the dispersant A and the dispersant B in reserve;

Example 7

The high-performance heat-insulation fluorocarbon paint is prepared from the following components in parts by weight: the production process comprises the following steps of taking 53 kg of PVDF fluorocarbon resin FK-2, 5 kg of rutile type titanium dioxide R-900, 28 kg of functional filler, 10 kg of heat preservation filler, 1.2 kg of ethylene glycol, 0.4 kg of alkali swelling thickener ASE60, 0.25 kg of polyether organic silicon defoamer SH-D120, 0.4 kg of leveling agent RM-2020, 0.6 kg of dispersant AM-C, 2.2 kg of trimethyl pentanediol monoisobutyrate, and 35 kg of deionized water, and referring to Table 1;

the functional filler is formed by mixing ceramic microspheres and high-fine barite powder in a weight ratio of 1:0.16, wherein the ceramic microspheres are hollow ceramic microspheres with the particle size of 20-45 mm and the height after screening; the heat preservation filler is prepared from the following components in percentage by weight of 1: 1, and the fly ash powder.

Preparing high-performance heat-insulating fluorocarbon paint:

Example 8

The high-performance heat-insulation fluorocarbon paint is prepared from the following components in parts by weight: 55 kg of PVDF fluorocarbon resin FK-2, 6 kg of rutile type titanium dioxide R-900, 25 kg of functional filler, 5 kg of heat preservation filler, 1.4 kg of ethylene glycol, 0.4 kg of alkali swelling thickener ASE60, 0.28 kg of polyether organic silicon defoamer SH-D120, 0.45 kg of leveling agent RM-2020, 0.7 kg of dispersant AM-C, 2.5 kg of trimethylpentanediol monoisobutyrate and 35 kg of deionized water, and the components are as shown in Table 1;

the functional filler is formed by mixing ceramic microspheres and high-fine barite powder in a weight ratio of 1:0.14, wherein the ceramic microspheres are hollow ceramic microspheres with the particle size of 20-45 mm and the height after screening; the heat-insulating filler is fly ash powder.

Preparing high-performance heat-insulating fluorocarbon paint:

Example 9

The high-performance heat-insulation fluorocarbon paint is prepared from the following components in parts by weight: 60 kg of PVDF fluorocarbon resin FK-2, 8 kg of rutile type titanium dioxide R-900, 30 kg of functional filler, 0 kg of heat-insulating filler, 1.5 kg of ethylene glycol, 0.3 kg of alkali swelling thickener ASE60, 0.3 kg of polyether organic silicon defoamer SH-D120, 0.5 kg of leveling agent RM-2020, 0.8 kg of dispersant AM-C, 3.5 kg of trimethylpentanediol monoisobutyrate and 40 kg of deionized water, and the components are as shown in Table 1;

the functional filler is formed by mixing ceramic microspheres and high-fine barite powder in a weight ratio of 1:0.13, wherein the ceramic microspheres are hollow ceramic microspheres with the particle size of 20-45 mu m after screening.

Preparing high-performance heat-insulating fluorocarbon paint:

Table 1 shows the raw material component contents (in kg) of examples 1 to 9

Comparative example 1

Comparative example 1 is the same as example 8 in composition and preparation process, except that no titanium dioxide is added.

Comparative example 2

Comparative example 2 is the same as example 8 in composition and preparation process, except that no functional filler is added to the formulation.

Comparative example 3

Comparative example 3 is the same as example 8 in composition and preparation process, except that no barite powder was added to the functional filler in the formulation.

Comparative example 4

A fluorocarbon topcoat comprises 210 kg of PVDF fluorocarbon resin FK-2, 200 kg of 40% thermoplastic acrylic resin, 130 kg of xylene, 80 kg of butyl acetate, 200 kg of rutile type titanium dioxide, and 5 kg of leveling agent RM-2020.

The preparation method of the fluorocarbon finish paint comprises the following steps: 210 kg of PVDF fluorocarbon resin FK-2, 200 kg of 40% thermoplastic acrylic resin, 80 kg of xylene and 80 kg of butyl acetate are added into a stirrer and stirred at the rotating speed of 800r/min for 15 minutes, the rotating speed is kept unchanged, 200 kg of rutile titanium dioxide, 5 kg of leveling assistant and 50 kg of xylene are added, the rotating speed is adjusted to 1200r/min, stirring is carried out for 30 minutes, and finally the stirred material is ground to the fineness of 25 below, thus obtaining the finished product.

Comparative example 5

An elastic fluorocarbon heat insulation coating and a preparation method and a use method thereof disclosed in chinese patent publication No. CN102492338A, the fluorocarbon heat insulation coating prepared in example 1 and capable of being applied by roll coating.

Performance test

(I) test of comprehensive Properties

The comprehensive performance of the fluorocarbon paints prepared in examples 1 to 9 and comparative examples 1 to 4 was tested, and the test results are shown in tables 2, 3 and 4.

Table 2 shows the overall properties of the fluorocarbon paints prepared in examples 1 to 5

As can be seen in table 2, the fluorocarbon paints prepared in example 1, example 2 and example 3 were homogeneously uniform, having excellent ability to reflect light; the fluorocarbon paint prepared in example 3 has a finer texture, and has better glossiness and light reflection capability.

Comparing the experimental data of example 3, example 4 and example 5, it was found that the weight ratio of dispersant a to dispersant B was 3: the fluorocarbon paint prepared by the method 7 has better comprehensive performance.

Table 3 shows the comprehensive properties of the fluorocarbon paints prepared in examples 6 to 9

Table 4 shows the comprehensive properties of the fluorocarbon paints prepared in comparative examples 1 to 5

It can be seen from the experimental data in tables 2, 3 and 4 that the fluorocarbon paints prepared in examples 1 to 9 have more excellent overall properties, mainly focusing on glossiness and sunlight reflection ability, compared to the fluorocarbon paints prepared in comparative examples 1 to 5.

Comparing example 8 with comparative example 1, it was found that the gloss and the ability to reflect light of the fluorocarbon paint without titanium dioxide added to the formulation were slightly reduced. Comparing example 8 with comparative example 2, it was found that the fluorocarbon paint formulation without the functional filler had decreased light reflection and gloss. Comparing example 8 with comparative example 3, it was found that the reflective properties of the fluorocarbon paint without barite powder added to the formulation did not change significantly. Comparing example 8 with comparative example 4, it was found that the fluorocarbon paint of the present invention has superior gloss and ability to reflect light compared to existing fluorocarbon paints. Comparing example 8 with comparative example 5, the fluorocarbon paint of the present invention has superior gloss and ability to reflect light.

(II) Heat insulation temperature difference test

The heat-insulating fluorocarbon paint prepared in examples 1-9 and the fluorocarbon paint prepared in comparative examples 1-5 were respectively coated on the outer surface of a steel plate box to be compared, the thickness of the steel plate was 5mm, and the thickness of the paint film was controlled to be 100 paint films. And (3) vertically irradiating the coated steel plate boxes for 30min under a halogen lamp bulb respectively to ensure that the distances between each steel plate box and the halogen lamp are equal, and recording the temperature difference between the internal temperature of each steel plate box and the surface temperature of the paint film after the test is finished. The results are shown in tables 5 and 6.

Table 5 shows the heat-insulating properties of the fluorocarbon paints prepared in examples 1 to 5

Position of	Example 1	Example 2	Example 3	Example 4	Example 5
						Temperature difference	11℃	12℃	10℃	9℃	10℃

Table 6 shows the heat-insulating properties of the fluorocarbon paints prepared in examples 6 to 9

Position of	Example 6	Example 7	Example 8	Example 9
					Temperature difference	10℃	9℃	8℃	9℃

Table 7 shows the heat-insulating properties of the fluorocarbon paints prepared in comparative examples 1 to 5

Position of	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4	Comparative example 5
						Temperature difference	15℃	22℃	14℃	31℃	15℃

From tables 5 and 6, it can be seen that the temperature difference between the interior of the steel box coated with the heat-insulating fluorocarbon paint of the present invention and the outer surface of the paint film is less than or equal to (10 ℃ coated), which indicates that the heat-insulating fluorocarbon paint of the present invention has a significant heat-insulating effect.

Referring to tables 6 and 7, comparing comparative example 1, comparative example 2 and example 8, it can be seen that the heat insulation performance of the heat insulation fluorocarbon paint of the present invention without titanium dioxide and functional filler is reduced; comparing comparative example 3 with example 8, it can be seen that barite powder has an effect on the thermal insulation performance of the present invention; comparing comparative example 4, comparative example 5 and example 8, the present invention has more excellent heat insulating performance.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The high-performance heat-insulation fluorocarbon paint is characterized by being prepared from the following components in parts by weight:

45-60 parts of fluorocarbon resin

3-8 parts of titanium dioxide

20-30 parts of functional filler

0-15 parts of heat-insulating filler

1-1.5 parts of ethylene glycol

0.3-0.5 part of alkali swelling thickener

0.2 to 0.3 portion of defoaming agent

0.3-0.5 part of flatting agent

0.4 to 0.8 portion of dispersant

1.5-3.5 parts of film-forming assistant

25-40 parts of deionized water

The functional filler comprises ceramic microspheres and barite powder.

2. The high-performance heat-insulation fluorocarbon paint as claimed in claim 1, characterized in that it is prepared from the following components in parts by weight: 50-55 parts of fluorocarbon resin, 4.5-6 parts of titanium dioxide, 25-30 parts of functional filler, 10-15 parts of heat-insulating filler, 1.2-1.5 parts of ethylene glycol, 0.3-0.5 part of alkali swelling thickener, 0.25-0.3 part of defoamer, 0.4-0.5 part of flatting agent, 0.6-0.8 part of dispersant, 1.8-2.5 parts of film-forming assistant and 30-40 parts of deionized water.

3. The high-performance heat-insulating fluorocarbon paint as claimed in claim 2, wherein the amount of titanium dioxide is 4.5-5 parts.

4. The high-performance heat-insulation fluorocarbon paint according to claim 2, wherein the weight ratio of the ceramic microspheres to the barite powder is (1:0.2) - (1: 0.13).

5. The high-performance heat-insulating fluorocarbon paint as claimed in claim 2, wherein the ceramic microbeads are hollow ceramic microbeads with particle size of 20-45 μm.

6. The high-performance heat-insulating fluorocarbon paint according to claim 2, wherein the barite powder is high-fine white barite powder.

7. The high-performance heat-insulating fluorocarbon paint as claimed in claim 1, wherein the heat-insulating filler is one or more of heavy calcium carbonate, fly ash powder and quartz sand.

8. A process for preparing the high-performance heat-insulating fluorocarbon paint as claimed in any one of claims 1 to 7, characterized by comprising the following steps:

s1, weighing the raw materials according to the parts by weight for later use;

s3, sequentially adding a defoaming agent and an alkali swelling thickener into 40% of deionized water at the rotating speed of 500-700 r/min, and uniformly mixing to prepare a mixed solution a for later use;

s5, adding the dispersing agent B, the heat preservation filler, the titanium dioxide and the functional filler into the mixture B in sequence, continuously stirring the mixture B in the adding process, controlling the stirring speed to be 1000-1200 r/min, and continuously stirring for 15-20 min after the adding is finished to obtain a mixture c;

and S7, standing the mixture c subjected to the operation for 4-7 minutes, and filtering by using a 150-mesh filter screen to obtain the high-performance heat-insulation fluorocarbon paint.