Method for rapidly testing thermochromic difference of real stone paint and application

Abstract

The invention belongs to the technical field of quality detection, and particularly relates to a method for rapidly testing the thermochromic difference of real stone paint and application. The method for rapidly testing the thermochromic difference of the real stone paint comprises the following steps: spraying the real stone paint on a plate subjected to primer treatment, then respectively drying at different temperatures, and carrying out chromatic aberration measurement on the dried real stone paint by utilizing a colorimeter to obtain the thermochromic difference of the real stone paint. Whether a thermochromic difference phenomenon exists or not is judged according to a color difference value between plate interfaces of the real stone paint at different temperatures; if the color difference value delta E is less than or equal to 1.0, the thermochromic difference does not exist, and if the color difference value delta E is more than 1.0, the thermochromic difference exists. The evaluation grade of the thermochromic difference is established, whether the real stone paint has the thermochromic difference or not can be rapidly judged, whether the real stone paint has the thermochromic difference or not can be rapidly and effectively judged before construction, and therefore the formula of the real stone paint is improved in a targeted mode, the problem of the thermochromic difference after construction is avoided, and the construction efficiency is improved. And therefore, unnecessary loss caused after construction can be avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of quality inspection, and particularly relates to a method and application for quickly testing the temperature-induced color difference of real stone paint. Background Art

[0002] As a new type of building decoration material, real stone paint benefits from the continuous development of the domestic real estate market, the promotion of projects such as old city renovation and new rural construction, and the improvement of consumers' requirements for the quality of building decoration. The market demand for real stone paint continues to grow. With the progress of technology, the production technology of real stone paint has been continuously improved, and at the same time, the market scale has been continuously expanding, and the product performance has been improved, providing more choices for the market.

[0003] Real stone paint has a realistic natural stone-like effect, making the decorative surface look more textured and three-dimensional, and the color of natural stone is an important factor that people deeply love. Therefore, the color stability of real stone paint under different temperature conditions is a key factor in measuring the performance of real stone paint. However, at present, there are also various problems in the actual application of real stone paint, such as cracking, peeling, and visual color difference in construction delivery. In particular, there are problems of uneven visual color difference and temperature-induced color difference after construction. This directly affects the appearance state of the building, making the building lose its due beauty and severely restricting the development and application space of real stone paint. At present, there is still a lack of a method or standard for quickly judging whether there is a temperature-induced color difference in real stone paint regarding whether the application of real stone paint in different environments will bring changes in visual color difference.

[0004] Therefore, providing a method for quickly testing the temperature-induced color difference of real stone paint, and then effectively improving the temperature-induced color difference of real stone paint, has very important significance. Summary of the Invention

[0005] The present invention aims to solve one or more of the above-mentioned technical problems existing in the prior art and provides at least one beneficial option. Specifically, the present invention provides a method for quickly testing the temperature-induced color difference of real stone paint, which establishes an evaluation grade for the temperature-induced color difference, and uses the color difference value as a measurement standard to quickly judge whether there is a temperature-induced color difference in real stone paint and the degree of the temperature-induced color difference.

[0006] The inventive concept of the present invention: The present invention places the board sprayed with real stone paint at different temperatures for drying, and uses a color difference meter to measure the color difference of the dried real stone paint; judges whether there is a temperature-induced color difference phenomenon according to the color difference value between the two board interfaces of the real stone paint at the corresponding temperature; when the color difference value ΔE≤1.0, it is judged that there is no temperature-induced color difference, and when the color difference value ΔE>1.0, it is judged that there is a temperature-induced color difference. Temperature change may cause changes in visual color difference after the real stone paint is dried. The present invention can quickly test whether the application of real stone paint in different environments will bring changes in visual color difference and can quickly judge whether there is a temperature-induced color difference phenomenon in real stone paint.

[0007] Therefore, the first aspect of the present invention provides a method for quickly testing the temperature-induced color difference of real stone paint.

[0008] Specifically, the method for quickly testing the temperature-induced color difference of real stone paint includes the following steps:

[0009] Treat the board with primer, then spray real stone paint, and dry it at different temperatures respectively, and use a color difference meter to measure the color difference of the dried real stone paint;

[0010] Judge whether there is a temperature-induced color difference phenomenon according to the color difference value between the interfaces of the real stone paint on the board at different temperatures; when the color difference value ΔE ≤ 1.0, it is judged that there is no temperature-induced color difference, and when the color difference value ΔE > 1.0, it is judged that there is a temperature-induced color difference.

[0011] Preferably, the board includes any one of PVC foam board and fiber cement board.

[0012] Preferably, the length of the board is 280 - 320 mm, and the width is 180 - 220 mm; further preferably, the length of the board is 290 - 310 mm, and the width is 190 - 210 mm.

[0013] Preferably, after the board is treated with primer, it is cured under the conditions of a temperature of 22 - 28 °C and a humidity of 45 - 55%; further preferably, after the board is treated with primer, it is cured under the conditions of a temperature of 23 - 27 °C and a humidity of 48 - 52%.

[0014] Preferably, the curing time is 3 - 5 h; further preferably, the curing time is 3.5 - 4.5 h.

[0015] Preferably, the spraying air pressure is 0.45 - 1.0 MPa; further preferably, the spraying air pressure is 0.5 - 1.0 MPa.

[0016] Preferably, during spraying, the consumption of the real stone paint is 2.3 - 3.3 kg / m 2 ; further preferably, during spraying, the consumption of the real stone paint is 2.5 - 3 kg / m 2 .

[0017] Preferably, the temperature includes at least two of T1, T2, T3, T4, T5, and T6; T1 is -7 to -3 °C, T2 is 3 - 7 °C, T3 is 13 - 17 °C, T4 is 23 - 27 °C, T5 is 33 - 37 °C, and T6 is 43 - 47 °C.

[0018] Further preferably, the temperatures include T1, T2, T3, T4, T5 and T6; T1 is -5°C, T2 is 5°C, T3 is 15°C, T4 is 25°C, T5 is 35°C, and T6 is 45°C.

[0019] Preferably, according to different environmental changes, the temperature-changing color difference can be divided into freeze-thaw temperature-changing color difference, low-temperature temperature-changing color difference, normal-temperature temperature-changing color difference and high-temperature temperature-changing color difference.

[0020] Specifically, the freeze-thaw temperature-changing color difference is the temperature-changing color difference of the real stone paint after drying at T1 and T3 temperatures; the low-temperature temperature-changing color difference is the temperature-changing color difference of the real stone paint after drying at T2 and T4 temperatures; the normal-temperature temperature-changing color difference is the temperature-changing color difference of the real stone paint after drying at T3 and T5 temperatures; the high-temperature temperature-changing color difference is the temperature-changing color difference of the real stone paint after drying at T4 and T6 temperatures. In the actual application process of the real stone paint, the present invention divides the temperature-changing levels into four levels: freeze-thaw temperature-changing level, low-temperature temperature-changing level, normal-temperature temperature-changing level, and high-temperature temperature-changing level. The change in temperature will cause a possible change in the visual color difference after the real stone paint dries. Through the method of the present invention, it can be quickly tested whether the application of the real stone paint in different environments will bring about a change in the visual color difference, and it can be quickly judged whether there is a temperature-changing color difference phenomenon in the real stone paint. In addition, the present invention establishes an evaluation level for the temperature-changing color difference. By taking the color difference value as a measurement standard, it is used to judge the degree of the temperature-changing color difference of the real stone paint in different temperature environments, filling the judgment standard for temperature-changing blooming during the application and construction of the real stone paint.

[0021] Preferably, the drying time is 23 - 25 h; further preferably, the drying time is 23.5 - 24.5 h.

[0022] The second aspect of the present invention provides an application of the method described in the first aspect of the present invention in improving the temperature-changing color difference of the real stone paint.

[0023] Preferably, the method for improving the temperature-changing color difference of the real stone paint includes the following steps:

[0024] Test the color difference of the real stone paint dried at different temperatures according to the method described in the first aspect of the present invention to judge the temperature-changing color difference; if there is a temperature-changing color difference, adjust the components of the real stone paint to improve the temperature-changing color difference.

[0025] The present invention can quickly test whether there is a temperature-changing color difference when the real stone paint is applied in different environments. If there is a temperature-changing color difference phenomenon, the temperature-changing color difference of the real stone paint can be improved by optimizing the components of the real stone paint, thereby avoiding the occurrence of temperature-changing color difference after construction and causing unnecessary losses.

[0026] Preferably, the adjusted components of the real stone paint include white sand with a mesh size of 120 - 180, white sand with a mesh size of 80 - 100, colored sand with a mesh size of 80 - 120, colored sand with a mesh size of 40 - 70, and emulsion.

[0027] Preferably, the components of the adjusted stone paint further include water, cellulose, film-forming aids, and other aids.

[0028] Preferably, by mass, the components of the adjusted stone paint include 10-15 parts of water, 0.2-2 parts of cellulose, 8-20 parts of emulsion, 0.2-1.0 part of film-forming aid, 5-15 parts of 120-180 mesh white sand, 10-20 parts of 80-100 mesh white sand, 20-50 parts of 80-120 mesh colored sand, 10-30 parts of 40-70 mesh colored sand, and 1-5 parts of other aids.

[0029] Preferably, the cellulose includes at least one of hydroxyethyl cellulose or hydroxypropyl cellulose.

[0030] Preferably, the emulsion includes pure acrylic emulsion.

[0031] Preferably, the film-forming aid is lauryl alcohol ester.

[0032] Preferably, the other aids include at least one of defoamer, thickener, antifreeze, pH regulator, and preservative.

[0033] Preferably, the defoamer includes mineral oil defoamer.

[0034] Preferably, the thickener includes alkali-swellable thickener.

[0035] Preferably, the antifreeze includes alcohol antifreeze.

[0036] Preferably, the pH regulator includes multifunctional amine regulator.

[0037] Preferably, the preservative includes isothiazolinone preservative.

[0038] Compared with the prior art, the beneficial effects of the technical solution provided by the present invention are as follows:

[0039] (1) Temperature changes may cause visual color difference changes after the stone paint dries. The present invention judges whether there is a temperature-induced color difference phenomenon based on the color difference value between two plates of the stone paint at the corresponding temperature. If the color difference value ΔE ≤ 1.0, it is determined that there is no temperature-induced color difference; if the color difference value ΔE > 1.0, it is determined that there is a temperature-induced color difference. The present invention can quickly test whether there is a temperature-induced color difference phenomenon when the stone paint is applied in different environments. The method is simple and easy to operate, and can be widely applied in practical applications.

[0040] (2) The present invention divides the temperature change levels into freeze-thaw temperature change level, low-temperature temperature change level, normal-temperature temperature change level, and high-temperature temperature change level. These four levels can quickly test whether there is a temperature-induced color difference in the application of real stone paint in different environments. The present invention establishes an evaluation level for temperature-induced color difference. By using the color difference value as a measurement standard, it can judge the degree of temperature-induced color difference in real stone paint, filling the gap in the judgment standard for temperature-induced blooming during the application and construction of real stone paint.

[0041] (3) The test method of the present invention can be applied to improve the temperature-induced color difference of real stone paint. If there is a temperature-induced color difference, the formula of the real stone paint can be adjusted to reduce the color difference of the real stone paint under different environmental conditions, effectively solving the problem of visual color difference in real stone paint due to temperature changes, avoiding the problem of temperature-induced color difference after construction, and thus avoiding unnecessary losses after construction. Through the method for improving the temperature-induced color difference of real stone paint of the present invention, during construction application, it can achieve the effects of both beauty and easy construction. Detailed implementation manners

[0042] In order to make those skilled in the art more clearly understand the technical solutions described in the present invention, the following examples are listed for illustration. It should be noted that the following examples do not limit the protection scope required by the present invention.

[0043] In the following examples, the raw materials, reagents or devices used, unless otherwise specified, can all be obtained from conventional commercial channels or can be obtained by existing known methods.

[0044] In Examples 1-2, the water in the real stone paint component is deionized water, the cellulose is hydroxyethyl cellulose, the emulsion is pure acrylic emulsion, the film-forming aid is dodecyl alcohol ester, the white sand is RS white sand, the colored sand is natural colored sand, the defoaming agent is mineral oil defoaming agent NXZ (San Nopco), the antifreeze is alcohol-based antifreeze ethylene glycol, the pH regulator is multi-functional amine regulator AMP-95 (Dow), the thickener is alkali-swellable thickener DR-72 (Dow), and the preservative is isothiazolinone preservative ROCIMA623 (Dow).

[0045] Example 1

[0046] A method for quickly testing the temperature-induced color difference of real stone paint, comprising the following steps:

[0047] (1) Take six pieces of PVC boards with a length of 300 mm and a width of 200 mm, and perform primer treatment on each of the six PVC boards, and then cure them for 4 h under standard conditions of a temperature of 25 ± 2 °C and a humidity of 50% for standby;

[0048] (2) Use a real stone paint spray gun (orifice diameter 4-6 mm) to spray the treated PVC boards obtained in step (1) at 2.8 kg / m 2Apply real stone paint spraying construction to the consumption of real stone paint, and the spraying air pressure is (0.5 - 1.0) MPa;

[0049] (3) Place the six pieces of PVC foam board sprayed with real stone paint under the temperature conditions of -5°C, 5°C, 15°C, 25°C, 35°C, and 45°C respectively for curing for 24 hours;

[0050] (4) Use a color difference meter to measure the color difference of the real stone paint dried at different temperatures. According to different environmental changes, the temperature color difference is divided into freeze-thaw temperature color difference, low-temperature temperature color difference, normal-temperature temperature color difference, and high-temperature temperature color difference; among them, the freeze-thaw temperature color difference is the temperature color difference between the two pieces of PVC foam board dried under the conditions of -5°C and 15°C (-5°C vs 15°C), the low-temperature temperature color difference is the temperature color difference between the two pieces of PVC foam board dried under the conditions of 5°C and 25°C (5°C vs 25°C), the normal-temperature temperature color difference is the temperature color difference between the two pieces of PVC foam board dried under the conditions of 15°C and 35°C (15°C vs 35°C), and the high-temperature temperature color difference is the temperature color difference between the two pieces of PVC foam board dried under the conditions of 25°C and 45°C (25°C vs 45°C); when the color difference value ΔE between the interfaces of the two pieces of PVC foam board is ≤ 1.0, there is no temperature color difference, and when ΔE > 1.0, there is a temperature color difference.

[0051] The real stone paint is composed of the following components in parts by mass:

[0052] 16 parts of deionized water, 0.4 part of cellulose, 10 parts of emulsion, 0.5 part of film-forming aid, 35 parts of white sand with a mesh size of 80 - 120, 18 parts of colored sand with a mesh size of 80 - 100, 16 parts of colored sand with a mesh size of 40 - 70, 0.5 part of defoamer, 0.9 part of antifreeze, 0.2 part of pH regulator, 0.2 part of thickener, 0.3 part of preservative.

[0053] After testing, the temperature color difference values ΔE of the real stone paint under freeze-thaw, low-temperature, normal-temperature, and high-temperature conditions are 2.97, 2.12, 0.89, and 2.52 respectively, and there is a phenomenon of temperature color difference in the real stone paint.

[0054] Optimize the components of the real stone paint. The optimized real stone paint is composed of the following components in parts by mass:

[0055] 15 parts of deionized water, 0.4 part of cellulose, 12 parts of emulsion, 0.5 part of film-forming aid, 13 parts of white sand with a mesh size of 120 - 180, 11 parts of white sand with a mesh size of 80 - 100, 31 parts of colored sand with a mesh size of 80 - 120, 15 parts of colored sand with a mesh size of 40 - 70, 0.5 part of defoamer, 0.9 part of antifreeze, 0.2 part of pH regulator, 0.2 part of thickener, 0.3 part of preservative.

[0056] According to the above method, the color difference values ΔE of the optimized real stone paint under freeze-thaw, low-temperature, normal-temperature, and high-temperature conditions are 0.94, 0.85, 0.97, and 0.76 respectively, and there is no phenomenon of temperature color difference in the optimized real stone paint.

[0057] Example 2

[0058] A method for quickly testing the temperature-induced color difference of stone-like paint, comprising the following steps:

[0059] (1) Take six pieces of PVC foam board with a length of 300 mm and a width of 200 mm, and perform primer treatment on each of the six pieces of PVC foam board. Then cure them for 4 h under standard conditions of a temperature of 25 ± 2 °C and a humidity of 50% for standby;

[0060] (2) Use a stone-like paint spray gun (with a caliber of 4 - 6 mm) to perform stone-like paint spraying construction on the treated PVC foam board obtained in step (1) at a stone-like paint consumption of 2.8 kg / m 2 with a spraying air pressure of (0.5 - 1.0) MPa;

[0061] (3) Place the six pieces of PVC foam board sprayed with stone-like paint under temperature conditions of -5 °C, 5 °C, 15 °C, 25 °C, 35 °C, and 45 °C respectively, and cure them for 24 h;

[0062] (4) Use a color difference meter to measure the color difference of the stone-like paint dried at different temperatures. According to different environmental changes, the temperature-induced color difference is divided into freeze-thaw temperature-induced color difference, low-temperature temperature-induced color difference, normal-temperature temperature-induced color difference, and high-temperature temperature-induced color difference; among them, the freeze-thaw temperature-induced color difference is the color difference between the two pieces of PVC foam board dried under the conditions of -5 °C and 15 °C (-5 °C vs 15 °C), the low-temperature temperature-induced color difference is the color difference between the two pieces of PVC foam board dried under the conditions of 5 °C and 25 °C (5 °C vs 25 °C), the normal-temperature temperature-induced color difference is the color difference between the two pieces of PVC foam board dried under the conditions of 15 °C and 35 °C (15 °C vs 35 °C), and the high-temperature temperature-induced color difference is the color difference between the two pieces of PVC foam board dried under the conditions of 25 °C and 45 °C (25 °C vs 45 °C); there is no temperature-induced color difference when the color difference ΔE between the interfaces of the two pieces of PVC foam board is ≤ 1.0, and there is a temperature-induced color difference when ΔE > 1.0.

[0063] The stone-like paint is composed of the following components in parts by mass:

[0064] 16 parts of deionized water, 0.4 part of cellulose, 10 parts of emulsion, 0.5 part of film-forming aid, 6 parts of white sand with a mesh size of 120 - 180, 29 parts of white sand with a mesh size of 80 - 100, 34 parts of colored sand with a mesh size of 40 - 70, 0.5 part of defoaming agent, 0.9 part of antifreeze, 0.2 part of pH regulator, 0.2 part of thickener, 0.3 part of preservative.

[0065] After testing, the temperature-induced color difference values ΔE of the stone-like paint under freeze-thaw, low-temperature, normal-temperature, and high-temperature conditions are 2.97, 2.12, 0.89, and 2.52 respectively, and the phenomenon of temperature-induced color difference of the stone-like paint appears.

[0066] Optimize the components of the stone-like paint. The optimized stone-like paint is composed of the following components in parts by mass:

[0067] 15 parts of deionized water, 0.3 part of cellulose, 12 parts of emulsion, 0.5 part of film-forming aid, 10 parts of white sand with a mesh size of 120 - 180, 16 parts of white sand with a mesh size of 80 - 100, 27 parts of colored sand with a mesh size of 80 - 120, 17 parts of colored sand with a mesh size of 40 - 70, 0.5 part of defoamer, 0.9 part of antifreeze, 0.2 part of pH regulator, 0.3 part of thickener, 0.3 part of preservative.

[0068] According to the above method, the color difference ΔE of the optimized stone-like paint under freeze-thaw, low temperature, normal temperature, and high temperature conditions is 0.68, 0.83, 0.92, and 0.86 respectively. At this time, there is no phenomenon of color difference due to temperature change in the optimized stone-like paint.

[0069] In summary, the present invention establishes an evaluation grade for color difference due to temperature change. Using the method of the present invention, it is possible to quickly and effectively determine whether there is a problem of color difference due to temperature change when the stone-like paint is applied in different environments. When the stone-like paint has a color difference due to temperature change, the color difference ΔE > 1.0. When the stone-like paint has no color difference due to temperature change, the color difference ΔE ≤ 1.0. This method can quickly and effectively determine whether the stone-like paint has a color difference due to temperature change before construction, so as to specifically improve the formula of the stone-like paint and avoid the problem of color difference due to temperature change after construction, and further avoid unnecessary losses after construction.

[0070] The present invention further applies this method to improving the color difference due to temperature change of the stone-like paint. By adjusting the formula of the stone-like paint, such as using the gradation of white sand and colored sand with different mesh sizes, and adjusting the thixotropy of the stone-like paint by adding a thickener, the color difference of the stone-like paint under different environmental conditions is reduced, effectively solving the problem of visual color difference of the stone-like paint due to temperature change.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for quickly testing the temperature-change color difference of real stone paint, characterized in that: The following steps are involved: The plates were primed, then sprayed with real stone paint, and dried at different temperatures. The color difference of the dried real stone paint was measured using a colorimeter. The presence or absence of temperature-dependent color difference is determined based on the color difference between the interfaces of the real stone paint panels at different temperatures; a color difference value of ΔE≤1.0 indicates no temperature-dependent color difference, and a color difference value of ΔE>1.0 indicates a temperature-dependent color difference.

2. The method according to claim 1, characterized in that The board material includes any one of a Chevron board and a fiber cement board.

3. The method according to claim 1, characterized in that After the plate is treated with primer, it is cured under the conditions of temperature of 22-28° C. and humidity of 45-55%.

4. The method according to claim 3, characterized in that The curing time is 3-5h.

5. The method according to claim 1, characterized in that The spraying air pressure is 0.45-1.0MPa; and / or, during the spraying, the consumption of the real stone paint is 2.3-3.3kg / m 2 .

6. The method according to claim 1, characterized in that The temperature includes at least two of T1, T2, T3, T4, T5, and T6; T1 is -7 to -3°C, T2 is 3-7°C, T3 is 13-17°C, T4 is 23-27°C, T5 is 33-37°C, and T6 is 43-47°C; and / or the drying time is 23-25h.

7. Application of the method described in any one of claims 1 to 6 in improving the temperature-dependent color difference of real stone paint.

8. The use according to claim 7, characterized in that: The method for improving the temperature-change color difference of real stone paint comprises the following steps: The color difference of the real stone paint after drying at different temperatures is tested according to the method described in any one of claims 1 to 6 to determine the temperature-dependent color difference; if there is a temperature-dependent color difference, the components of the real stone paint are adjusted to improve the temperature-dependent color difference.

9. The use according to claim 8, characterized in that: The adjusted components of the real stone paint include 120-180 mesh white sand, 80-100 mesh white sand, 80-120 mesh colored sand, 40-70 mesh colored sand, and emulsion.

10. The use according to claim 9, characterized in that: The adjusted components of the real stone paint also include water, cellulose, film-forming aids, and other additives.