CN113527965A

CN113527965A - Water-in-water temperature-sensitive color-changing coating and preparation method thereof

Info

Publication number: CN113527965A
Application number: CN202110758381.XA
Authority: CN
Inventors: 葛厚杰; 熊爱容; 陈寿生; 刘志刚
Original assignee: Puyang Zhanchen New Material Co ltd
Current assignee: Puyang Zhanchen New Material Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-10-22

Abstract

The application relates to the technical field of coatings, and provides a water-in-water thermochromic coating, which comprises: 20-30 parts of base paint; 50-60 parts of dispensing solution; 20-30 parts of a continuous phase; wherein the base paint comprises the following components in parts by weight: 0.8-1 part of cellulose, 2-5 parts of temperature-sensitive color-changing paste, 0.45-1.5 parts of common color paste, 6-8 parts of filler, 7-8 parts of acrylic emulsion, 5-6 parts of sampling point and 1.6-1.7 parts of auxiliary agent; 55-57 parts of water. The components provided by the method have a synergistic effect, so that the dispersibility of color points formed by adopting dispensing to coat temperature-sensitive color-changing color paste particles in a coating system is improved, the color points are effectively prevented from demulsifying, the water-in-water temperature-sensitive color-changing coating is endowed with good stability, the storage period of the coating is greatly prolonged, and the color-changing substances can realize the change of 'colored-colorless' and 'colorless-colored' states, thereby realizing the temperature-changing effect.

Description

Water-in-water temperature-sensitive color-changing coating and preparation method thereof

Technical Field

The application belongs to the technical field of coatings, and particularly relates to a water-in-water thermochromic coating and a preparation method thereof.

Background

The water-in-water coating is also called liquid granite coating, is a stone-like coating, can produce vivid and durable granite color, and the simulation degree can reach 95 percent, so the water-in-water coating is commonly used for preparing granite-like inner and outer walls.

The water-in-water temperature-sensitive color-changing coating is formed by dispersing a color dispersion phase in a continuous phase, a coating system comprises pigment, filler, a film-forming substance and a collecting and dispensing point, and the film-forming substance applied to the coating at present is mainly an organic substance, and the organic film-forming substance is poor in compatibility with the pigment and the filler, so that the dispersibility of the pigment and the filler in the system is poor, the stability of the water-in-water temperature-sensitive color-changing coating is generally poor, the storage period is short, and the application requirements of people cannot be met.

Disclosure of Invention

The application aims to provide a water-in-water thermochromic paint and a preparation method thereof, and aims to solve the problems of low stability and short storage period of the existing water-in-water thermochromic paint.

In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:

in a first aspect, the present application provides a water-in-water thermochromic paint, which comprises:

20-30 parts of base paint;

50-60 parts of dispensing solution is adopted;

20-30 parts of a continuous phase;

wherein the base paint comprises the following components in parts by weight: 0.8-1 part of cellulose, 2-5 parts of temperature-sensitive color-changing paste, 0.45-1.5 parts of common color paste, 6-8 parts of filler, 7-8 parts of acrylic emulsion, 5-6 parts of sampling point and 1.6-1.7 parts of auxiliary agent; 55-57 parts of water.

In a second aspect, the application provides a preparation method of a water-in-water thermochromic paint, which comprises the following steps:

preparing dispensing solution, base paint and continuous phase according to the water-in-water thermochromic coating;

mixing the base paint with common color paste according to color requirements to obtain a first required color, mixing the colors with temperature-sensitive color paste to obtain a second required color, adding the mixed base paint components into the dispensing solution, and performing first mixing treatment to obtain a color point mixed solution;

and adding the color point mixed solution into the continuous phase and carrying out second mixing treatment to obtain the water-in-water thermochromic paint.

According to the water-in-water temperature-sensitive color-changing coating provided by the first aspect of the application, the water-in-water temperature-sensitive color-changing coating comprises a base paint, a dispensing solution and a continuous phase; the base paint comprises the dispensing point, the temperature-sensitive color-changing color paste, the common color paste, cellulose and acrylic emulsion in specific weight parts, and the components have synergistic effect, so that the dispersibility of color points formed by coating temperature-sensitive color-changing color paste particles with the dispensing point in a paint system is improved, the color points are effectively prevented from being demulsified, the water-in-water temperature-sensitive color-changing paint is endowed with good stability, and the storage period of the paint is greatly prolonged. In addition, the temperature-sensitive color-changing paste and the common paste used in the base paint formula carry out color mixing of a first required color and a second required color with the temperature-sensitive paste and the common paste to achieve a required temperature-sensitive color-changing effect, the temperature-sensitive paste can change the molecular structure of the organic matter due to electron transfer at a specific temperature, so that the organic matter is associated into a new stable colorless oxide, and the color-changing matter changes from 'colored-colorless' state and 'colorless-colored' state, so that the temperature-changing effect is realized.

According to the preparation method of the water-in-water temperature-sensitive color-changing coating provided by the second aspect of the application, the base paint is added into the dispensing solution for first mixing treatment, so that one or more base paints with well-mixed colors are granulated in the dispensing solution; and then, adding the color point dispersion liquid into the continuous phase to mix the color points into the continuous phase, thereby obtaining the water-in-water thermochromic paint capable of forming a film on the substrate. The method promotes the color points to be uniformly dispersed in the coating system, ensures that the coating has good stability, is simple and convenient to operate, and is suitable for large-scale preparation of the water-in-water thermochromic coating.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.

The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The first aspect of the embodiment of this application provides a water-in-water temperature-sensitive color-changing coating, water-in-water temperature-sensitive color-changing coating includes:

20-30 parts of base paint;

50-60 parts of dispensing solution is adopted;

20-30 parts of a continuous phase;

Specifically, the water-in-water thermochromic paint comprises 20-30 parts of base paint, and the base paint is a base component of the water-in-water thermochromic paint. In the examples of the present application, the base paint comprises the following components in parts by weight: 0.8-1 part of cellulose, 2-5 parts of temperature-sensitive color-changing paste, 0.45-1.5 parts of common color paste, 6-8 parts of filler, 7-8 parts of acrylic emulsion, 5-6 parts of sampling point and 1.6-1.7 parts of auxiliary agent; 55-57 parts of water.

Specifically, the water-in-water thermochromic paint comprises 50-60 parts of dispensing solution. In the embodiment of the application, the dispensing solution comprises the following components in parts by weight: 3.9-4.0 parts of dispensing glue, 0.6-0.7 part of auxiliary agent and 95.3-95.5 parts of water. Wherein, the cellulose is added into the dispensing solution as an anti-settling auxiliary agent, so that small-particle color spots formed after the base paint is granulated in the dispensing solution can be uniformly dispersed in a coating system, and the stability of the coating is further improved.

Specifically, the water-in-water thermochromic coating comprises 20-30 parts of a continuous phase. Wherein, the auxiliary agent is added into the continuous phase to meet the temperature sensitive paint standard for buildings. In the examples of the present application, the continuous phase comprises the following components in parts by weight: 60-70 parts of acrylic emulsion, 11-12 parts of auxiliary agent and 12-29 parts of water.

In some embodiments, the base paint comprises 0.8-1 part of cellulose, the cellulose is provided to form a three-dimensional network structure in an aqueous solution, so that color dots formed by adopting glue and coating temperature-sensitive color paste particles are coated in the cellulose, and meanwhile, the cellulose provides functional groups for crosslinking with adopting glue and acrylic emulsion, so that the color dots can be uniformly and stably dispersed in a paint system, the color dots are prevented from being settled in the application or storage process, the good stability of the water-in-water temperature-sensitive allochroic paint is improved, and the storage period of the paint is greatly prolonged.

In some embodiments, the base paint comprises 2-5 parts of temperature-sensitive color-changing color paste and 0.45-1.5 parts of common color paste, the temperature-sensitive color paste and the common color paste are blended, on one hand, the required color of the paint obtained by blending can be ensured, color points are formed under the coating effect of the protective glue, and different marble-like effects can be obtained by adjusting the ratio of the color paste to the color-mixing base paint, for example, by compounding the blue temperature-sensitive color paste with different kinds of color-mixing base paints.

In some embodiments, the thermochromic color paste is selected from microencapsulated reversible thermochromic materials prepared from an electron transfer organic compound system, wherein the electron transfer organic compound is an organic color system with a special chemical structure, and the molecular structure of the organic material is changed by electron transfer at a specific temperature, so that the organic material is associated into a new stable colorless oxide, and the color change is changed from 'colored-colorless' state and 'colorless-colored' state, thereby realizing the temperature change effect.

In some embodiments, the thermochromic color paste is selected from at least one of flourishing color science B71 blue and flourishing color science H95 charcoal gray.

In some embodiments, the base paint includes 6-8 parts filler, with filler fillers added primarily to adjust the gloss, texture, and viscosity of the coating. Further, the filler is at least one selected from kaolin, calcium carbonate, barite powder and talcum powder. In a particular embodiment of the present application, the filler is chosen from kaolin, which is provided as a filler capable of improving the thixotropy of the product and ensuring the absence of ionic structural interference. The filler is at least one of montmorillonite calcined kaolin and inner montmorillonite Sanbao calcined kaolin, and has the functions of increasing thixotropy, improving a sampling point skeleton and having no groups capable of participating in reaction. In one embodiment, the filler is selected to be 4000 mesh calcined kaolin.

In some embodiments, the base paint and the continuous phase each comprise an acrylic emulsion, wherein the acrylic emulsion is selected from at least one of a silicone-acrylic emulsion, a pure acrylic emulsion. The emulsion is compatible with cellulose dispersion liquid, and can improve the stability of the coating to a certain extent.

In some embodiments, the base paint, the dispensing solution and the continuous phase include dispensing, and the provided dispensing mainly plays a role in coating the temperature-sensitive color paste particles to play a role in steric hindrance and form a double electronic layer on the coating layer, so that the color dots are prevented from being dissolved in the subsequent continuous phase to form independent color dots and form marbleized patterns after construction. In the embodiment of the application, at least one of magnesium lithium silicate and magnesium aluminum silicate is dispensed. In some embodiments, S482, which is GS or rockwood, for selecting the point as the grid, is taken.

In some embodiments, the base paint, the continuous phase, and the dispensing solution each include an auxiliary agent, wherein the auxiliary agent includes at least one of a defoamer, a pH adjuster, a film forming aid, an antifreeze agent, a thickener, a bactericide, a dispersant, and a wetting agent.

In some embodiments, the base paint further comprises the following components in parts by weight: 0.4-0.5 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.5-0.6 part of defoaming agent, 0.4-0.5 part of antifreezing agent, 0.9-1 part of film-forming assistant and 0.3-0.4 part of bactericide.

In some embodiments, the continuous phase further comprises an adjuvant comprising the following components in parts by weight: 0.4-0.5 part of defoaming agent, 0.2-0.3 part of pH regulator, 4-5 parts of film-forming aid, 4-5 parts of antifreezing agent, 0.4-0.5 part of thickening agent and 0.8-1 part of bactericide.

In some embodiments, the defoaming agent is selected from silica defoaming agents, the silica defoaming agent is provided as the defoaming agent, the main function of the defoaming agent is to eliminate foams formed by materials in the production process, and the defoaming agent is thick-coated and powerful in defoaming and has a good defoaming effect.

In some embodiments, the wetting agent is selected from at least one of grid V145, 399, dow 1124, and craine LCN407, and is provided to primarily wet the powder, embed the dispensed dots to form negative charges, and form an electric double layer structure with the colored dots.

In some embodiments, the dispersant is selected from at least one of Rohm and Haas 731A and Nopock SN5040, and the dispersant is provided to substantially ensure that the filler and mill base are uniformly dispersed in the dispersed phase and stabilize the electric double layer structure.

In some embodiments, the freezing point depressant is at least one selected from the group consisting of Zhongqi ethylene glycol and Xinjiang ethylene glycol, and is provided to be beneficial for reducing the freezing point of water-in-water to achieve freeze-thaw resistance.

In some embodiments, the film forming aid is at least one selected from the group consisting of Runtai C-12 and Islam alcohol ester twelve, and the film forming aid is beneficial to forming a film on water-in-water at a low temperature and relaxing the applicable conditions.

In some embodiments, the biocide is selected from isothiazolinone biocides. The isothiazolinone germicides include, but are not limited to, 2-methyl-4-isothiazolin-3-one (abbreviated as MIT) and 1, 2-benzisothiazolin-3-one (abbreviated as BIT). In particular embodiments, the biocide is selected from the group consisting of Sol biocides, such as Sol MB, Sol MV, and the like.

Furthermore, the relative amounts of the base paint, the dispensing solution and the continuous phase are adjusted to obtain the water-in-water thermochromic paint with the performance meeting the actual application requirement. In some embodiments, the base paint, the dispensing solution, and the continuous phase are in a weight ratio of 5:2: 3. In another embodiment, the weight ratio of the base paint, the dispensing solution, and the continuous phase is 6:2: 2. By controlling the addition amounts of different components, the water-in-water temperature-sensitive color-changing coating provided by the embodiment of the application has good stability and long storage period, meets the requirement on the content of high molecular organic matters in the temperature-sensitive coating standard for buildings, and can meet the requirements on various aspects such as energy conservation, environmental protection and safety.

The second aspect of the embodiment of the application provides a preparation method of a water-in-water thermochromic paint, which comprises the following steps:

s01, preparing a dispensing solution, a base paint and a continuous phase according to the water-in-water temperature-sensitive color-changing coating;

s02, mixing colors of the base paint by using common color paste according to color requirements to obtain a first required color, mixing colors by using temperature-sensitive color paste to obtain a second required color, adding each mixed color of the base paint components into the dispensing solution, and performing first mixing treatment to obtain a color point mixed solution;

and S03, adding the color point mixed solution into the continuous phase and carrying out second mixing treatment to obtain the water-in-water thermochromic paint.

In step S01, the compositions and effects of the dispensing solution, the base paint, and the continuous phase are provided by referring to the above descriptions, which are not repeated herein for the sake of brevity.

In step S02, the base paint is first mixed with a common color paste according to color requirements to obtain a first required color, then mixed with a temperature sensitive color paste to obtain a second required color, and then each mixed base paint component is added to the dispensing solution and subjected to a first mixing treatment to obtain a mixed solution.

In step S03, the color point mixture is added to the continuous phase and subjected to a second mixing process, so that the dots are mixed in the continuous phase to obtain a water-in-water thermochromic paint which can be formed into a film on the substrate, and the water-in-water thermochromic paint forms a continuous protective film on the substrate to protect the color points.

The specific operation of adding the sampling point mixed liquid into the continuous phase and performing the second mixing treatment can refer to the conventional technology in the field, for example, the sampling point dispersion liquid is added into the continuous phase under the high-speed stirring state, so that the sampling points are uniformly dispersed in the continuous phase, and each sampling point is independent in a sheet shape or a particle shape in the continuous phase and is not mutually compatible.

Further, after the step of adding the color point mixture to the continuous phase and performing the second mixing treatment, the viscosity of the paint may be adjusted by adding a small amount of a thickener.

The following description will be given with reference to specific examples.

Example 1

The embodiment provides a water-in-water temperature-sensitive color-changing coating, and the preparation method comprises the following steps:

(1) preparation of dispensing solution

Weighing respectively: 95.32 parts of water, 4 parts of lithium magnesium silicate, 0.08 part of cellulose and 0.6 part of bactericide; then, lithium magnesium silicate, cellulose and a bactericide were added to water and dispersed for 40 minutes.

(2) Preparation of the continuous phase

Weighing respectively: 22.2 parts of water, 70 parts of silicone-acrylic emulsion, 0.4 part of defoaming agent, 0.4 part of pH regulator, 1.5 parts of film-forming assistant, 4 parts of antifreezing agent, 0.7 part of thickening agent and 0.8 part of bactericide; then, the rest components are added into water in sequence and stirred evenly at medium and low speed.

(3) Preparation of the base paint

Weighing respectively: 56.15 parts of water, 1.1 parts of cellulose, 0.4 part of dispersant, 0.15 part of wetting agent, 0.3 part of defoaming agent, 0.5 part of antifreeze, 0.4 part of film-forming assistant, 2-5 parts of temperature-sensitive color-changing color paste, 0.45-1.5 parts of common color paste, 3 parts of filler, 8 parts of pure acrylic emulsion, 5.6 parts of 8% magnesium lithium silicate glue solution and 0.4 part of bactericide;

then, adding cellulose, a dispersing agent, a wetting agent, a defoaming agent, an antifreezing agent, a film-forming aid, a temperature-sensitive color paste and a filler into water, dispersing for 15 minutes at a high speed of 1300 rpm, adding a pure acrylic emulsion, lithium magnesium silicate and a bactericide in a medium-speed dispersion state of 800 rpm, stirring for 10 minutes, and adding the temperature-sensitive color powder into a system according to the color of a sample to be blended into the required color;

the base paint with 2-6 different colors is prepared by increasing and decreasing the proportion of the temperature-sensitive color paste and the common color paste according to the same method for standby.

(4) Preparation of water-in-water thermochromic coating

Adding base paints (6 parts in total) with different colors into 2 parts of the dispensing solution for dispensing, then adding 2 parts of the continuous phase for uniformly mixing, and adding a little thickening agent for adjusting the viscosity.

When the water-in-water thermochromic paint is used, the water-in-water thermochromic paint prepared by the embodiment is sprayed and constructed on indoor wall decoration and outer wall decoration.

Comparative example 1

The universal water-in-water temperature-sensitive color-changing coating is provided in the market.

Compared with the common water-in-water temperature-sensitive color-changing coating in the market, the water-in-water temperature-sensitive color-changing coating prepared in the embodiment 1 has the following advantages:

1. the thermochromic imitated plane marble paint is thermochromic imitated plane marble paint, the color of the thermochromic imitated plane marble paint can be changed according to the change of temperature, for example, when the temperature sensitive color paste is controlled to be at 28 ℃, the color is adjusted to be marble represented by red phase, when the temperature is increased to be above 28 ℃, the color can be changed to be cold-tone marble represented by blue, and the type of the color can be freely adjusted according to the requirement. The temperature-sensitive color-changing water-in-water coating also achieves very high standards in the aspects of water permeability, mildew resistance and scrub resistance, and can meet the requirement of high quality of modern people.

The color of the temperature-sensitive color-changing water-in-water coating can be changed according to the change of ambient temperature in the aspect of color, so that the reflective heat insulation property of a wall body can be improved, for example, the color of the water-in-water coating is light at the temperature of more than 28 ℃, the light color can well reflect sunlight to prevent the wall body from being heated, and when the temperature is higher than 23 ℃, the water-in-water coating is changed into dark color which can absorb the sunlight to warm the wall body; the change of the ambient temperature can also be sensed according to the change of the color of the water in the water bag.

2. Has excellent water resistance, weather resistance and storage temperature.

The common water-in-water thermochromic paint on the market cannot realize the thermochromic function.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a water-in-water temperature-sensitive color-changing coating which characterized in that, water-in-water temperature-sensitive color-changing coating includes:

20-30 parts of base paint;

50-60 parts of dispensing solution is adopted;

20-30 parts of a continuous phase;

2. The water-in-water temperature-sensitive color-changing coating of claim 1, wherein the dispensing solution comprises the following components in parts by weight: 3.9-4.0 parts of dispensing glue, 0.6-0.7 part of auxiliary agent and 95.3-95.5 parts of water.

3. The water-in-water thermochromic paint according to claim 1, wherein the continuous phase comprises the following components in parts by weight: 60-70 parts of acrylic emulsion, 11-12 parts of auxiliary agent and 12-29 parts of water.

4. The water-in-water thermochromic coating material according to any one of claims 1 to 3, wherein the thermochromic color paste is selected from microencapsulated reversible thermochromic substances; and the temperature-sensitive color-changing paste is selected from at least one of flourishing color science B71 blue and flourishing color science H95 charcoal gray.

5. The water-in-water thermochromic paint according to any one of claims 1 to 3, wherein the acrylic emulsion is at least one selected from silicone-acrylic emulsion and pure acrylic emulsion; and/or

The dispensing is selected from at least one of magnesium lithium silicate and magnesium aluminum silicate.

6. The water-in-water thermochromic paint according to any one of claims 1 to 3, wherein the filler is at least one selected from kaolin, calcium carbonate, barite powder and talc; and/or the presence of a gas in the gas,

the common color paste is selected from common white pigments or common color pigments.

7. The water-in-water thermochromic paint according to any one of claims 1 to 3, wherein the auxiliary comprises at least one of a defoaming agent, a pH regulator, a film-forming auxiliary, an antifreezing agent, a thickening agent, a bactericide, a dispersing agent, and a wetting agent.

8. The water-in-water thermochromic paint according to claim 7, further comprising the following additives in parts by weight: 0.4-0.5 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.5-0.6 part of defoaming agent, 0.4-0.5 part of antifreezing agent, 0.9-1 part of film-forming assistant and 0.3-0.4 part of bactericide; and/or the presence of a gas in the gas,

the continuous phase also comprises the following auxiliary agents in parts by weight: 0.4-0.5 part of defoaming agent, 0.2-0.3 part of pH regulator, 4-5 parts of film-forming aid, 4-5 parts of antifreezing agent, 0.4-0.5 part of thickening agent and 0.8-1 part of bactericide.

9. The water-in-water thermochromic paint according to claim 8, wherein the defoaming agent is selected from silica defoaming agents; and/or

The wetting agent is selected from at least one of gridding V145, 399, Dow 1124 and Craine LCN 407; and/or

The dispersant is selected from at least one of Rohm Hass 731A and Norpleaceae SN 5040; and/or

The antifreezing agent is at least one of middle enterprise power glycol and Xinjiang Tianye glycol; and/or

The film forming auxiliary agent is at least one of Runtai C-12 and Islam alcohol ester twelve; and/or

The bactericide is selected from isothiazolinone bactericides.

10. A preparation method of the water-in-water thermochromic paint is characterized by comprising the following steps:

the water-in-water thermochromic coating of any one of claims 1 to 9, formulated from a dispensing solution, a base paint and a continuous phase;