Preparation method of stone-like water-based paint

Abstract

The invention relates to a preparation method of a water-based paint, in particular to a preparation method of a stone-like water-based paint, and the preparation method comprises the steps of calcining for fixation, ball milling treatment, pulping and mixing.According to the paint, quartz stone powder and color sand are calcined at the high temperature of 600-900 DEG C, so that the crystal structure of the quartz stone powder is densified, ultraviolet rays are effectively resisted, and the stone-like water-based paint is obtained; after the color sand is subjected to high-temperature color fixation, pigment molecules and the stone powder are combined more firmly, and color fading is delayed, so that the stone-like water-based paint has excellent weather resistance, ultraviolet resistance and color durability.

Description

Technical Field

[0001] The invention relates to a method for preparing a water-based paint, in particular to a method for preparing a stone-imitation water-based paint. Background Art

[0002] Existing imitation stone paints are mainly made by mixing white stone powder with organic color paste. However, the existing imitation stone water-based paints generally have the following defects: poor weather resistance: under long-term exposure to ultraviolet rays, the organic molecules in the water-based paint (especially acrylic paint) undergo molecular chain breakage and rearrangement, which leads to changes in the color of the paint; the color is not durable enough and fades significantly in a short period of time.

[0003] Therefore, there is an urgent need for a stone-like water-based paint with excellent weather resistance, UV resistance and color durability. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a method for preparing a stone-like water-based paint with excellent weather resistance, UV resistance and color durability.

[0005] The technical solution adopted by the present invention to solve the problem is: a preparation method of stone-like water-based paint, comprising the following steps: S1, calcination and color fixing: calcining quartz stone powder and colored sand at high temperature for 1-2 hours, the calcination temperature is 800-900°C, and a first mixed stone powder is obtained.

[0006] As a further improvement of the above technical solution, the following steps are also included: S3, slurry preparation: mix the defoamer, wetting agent, stabilizer, ethylene glycol, film former, preservative, bactericide and water, add acrylic emulsion and stir and disperse to obtain slurry; S4, mixing: add the second mixed stone powder to the slurry, stir until the system is uniform, and obtain the finished coating.

[0007] As a further improvement of the above technical solution, it is made of the following raw materials in parts by weight: 0.5-1.5 parts of defoaming agent, 0.5-1.5 parts of wetting agent, 1-3 parts of titanium dioxide, 0.4-0.6 parts of stabilizer, 0.5-1.5 parts of ethylene glycol, 1-2 parts of film-forming agent, 0.4-0.6 parts of preservative, 0.4-0.6 parts of bactericide, 10-30 parts of acrylic emulsion, 10-30 parts of quartz stone powder, 10-15 parts of colored sand and 5-15 parts of water.

[0008] As a further improvement of the above technical solution, the calcination temperature is 900°C.

[0009] The beneficial effects of the present invention are as follows: the present invention densifies the crystal structure of the quartz powder and the colored sand at a high temperature of 600-900°C, effectively resisting ultraviolet rays; after the colored sand is fixed at high temperature, the pigment molecules are more firmly combined with the stone powder, delaying fading, thereby making the imitation stone water-based paint have excellent weather resistance, ultraviolet resistance and color durability. DETAILED DESCRIPTION

[0010] In all embodiments of the present invention, unless otherwise specified about temperature and pressure, all are at room temperature and pressure, and unless otherwise specified about the use of equipment, all can be used according to conventional settings.

[0011] A method for preparing a stone-like water-based paint is prepared from the following raw materials in parts by weight: 1 part of a defoamer, 1 part of a wetting agent, 2 parts of titanium dioxide, 0.5 parts of a stabilizer, 1 part of ethylene glycol, 1.5 parts of a film-forming agent, 0.5 parts of a preservative, 0.5 parts of a bactericide, 20 parts of an acrylic emulsion, 20 parts of quartz powder, 12 parts of colored sand and 10 parts of water.

[0012] In a preferred embodiment, the defoaming agent is an organosilicon defoaming agent; the wetting agent is octylphenol polyoxyethylene ether; the stabilizer is polyethyleneimine; the film-forming agent is CS-12 film-forming agent provided by Nippon Zinc Co., Ltd.; the preservative is LX-150 from Dow Chemical; and the bactericide is BI T-20.

[0013] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific implementation methods. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0014] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0015] Embodiment 1: A method for preparing a stone-like water-based paint, the steps are as follows:

[0016] S1. Calcination and color fixing: calcine the quartz powder and colored sand in the above weight proportions at 900° C. for 1.5 hours to obtain a first mixed stone powder.

[0017] S2, ball milling: add the first mixed stone powder and titanium dioxide in S1 into a high energy ball mill for ball milling for 1 hour to obtain a second mixed stone powder.

[0018] S3, slurry preparation: the above-mentioned defoamer, wetting agent, stabilizer, ethylene glycol, film former, preservative, fungicide and water are mixed, and acrylic emulsion is added and stirred to disperse to prepare slurry.

[0019] S4, mixing: adding the second mixed stone powder into the slurry, stirring until the system is uniform, thus obtaining Example 1.

[0020] Embodiment 2: A method for preparing a stone-like water-based paint, the steps are as follows:

[0021] S1. Calcination and color fixing: calcine the quartz powder and colored sand in the above weight proportions at 900° C. for 1.5 hours to obtain a first mixed stone powder.

[0022] S3, slurry preparation: the above-mentioned defoamer, wetting agent, stabilizer, ethylene glycol, film former, preservative, fungicide and water are mixed, and acrylic emulsion is added and stirred to disperse to prepare slurry.

[0023] S4, mixing: adding the first mixed stone powder and titanium dioxide into the slurry, stirring until the system is uniform, thus obtaining Example 2.

[0024] Embodiment 3: The difference from Embodiment 1 is that the high temperature calcination temperature is 800°C.

[0025] Embodiment 4: The difference from Embodiment 1 is that the high temperature calcination temperature is 850°C.

[0026] Embodiment 5: The difference from Embodiment 1 is that the high temperature calcination temperature is 950°C.

[0027] Comparative Example 1: A method for preparing a stone-like water-based paint, the steps are as follows:

[0028] A1. Slurry preparation: Mix the above-mentioned defoamer, wetting agent, stabilizer, ethylene glycol, film former, preservative, fungicide and water in the above-mentioned weight proportions, add acrylic emulsion and stir to disperse, so as to prepare slurry.

[0029] A2. Mixing: Add the quartz powder, colored sand and titanium dioxide into the slurry, and stir until the system is uniform, so as to obtain Comparative Example 1.

[0030] The above-mentioned Example 1, Example 2, Example 3, Example 4, Example 5 and Comparative Example 1 were subjected to ultraviolet aging test and exposure test.

[0031] Among them, ultraviolet aging test: using ultraviolet accelerated aging box, by adjusting the intensity of the light source (UVA-340 lamp, simulating the ultraviolet part of sunlight), temperature, humidity and other parameters, the aging process of the coating is accelerated. Parameters: temperature setting range is 60 ~ 80 ℃; humidity is controlled at 50% RH (relative humidity); aging time is 30 days. Exposure test: the sample is directly placed outdoors for long-term exposure, and the color change value of the coating sample before and after exposure is measured using a colorimeter (ΔE*ab, indicating the size of the color difference before and after the coating is aged, the smaller the value, the less obvious the color change.) to evaluate the color durability of the coating.

[0032] The test data are as follows:

[0033] category UV transmittance / % Color change / (ΔE*ab) Embodiment 1 3 0.3 Embodiment 2 8 2.0 Embodiment 3 3 1.5 Embodiment 4 5 1.0 Embodiment 5 10 2.0 Comparative Example 1 35 7.0

[0034] By comparing Example 1 and Example 2, it can be seen that the quartz powder, colored sand and titanium dioxide treated by ball milling can further improve the UV resistance and color durability of the coating.

[0035] By comparing Example 1, Example 3, Example 4 and Example 5, it can be seen that the coating with a calcination temperature of 900° C. has better UV resistance and color durability.

[0036] By comparing the embodiments and comparative examples (common acrylic paints on the market), the paint of the present invention densifies the crystal structure of the quartz powder and effectively resists ultraviolet rays by calcining quartz powder and colored sand at a high temperature of 800-900°C. After the colored sand is fixed at high temperature, the pigment molecules are more firmly combined with the stone powder, delaying fading, thereby making the imitation stone water-based paint have excellent weather resistance, ultraviolet resistance and color durability.

[0037] The above implementation modes cannot limit the protection scope of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, and these changes and improvements all fall within the scope of the invention claimed for protection.

Claims

1. A method for preparing a stone-like water-based paint, characterized in that: The steps include: S1. Calcination and color fixing: calcine the quartz powder and colored sand at high temperature for 1-2 hours, the calcination temperature is 600-900°C, and the first mixed stone powder is obtained.

2. The method for preparing a stone-like water-based paint according to claim 1, characterized in that: The following steps are also included: S3, slurry preparation: mixing a defoamer, a wetting agent, a stabilizer, ethylene glycol, a film former, a preservative, a bactericide and water, adding an acrylic emulsion and stirring and dispersing the mixture to prepare a slurry; S4, mixing: adding the first mixed stone powder and titanium dioxide into the slurry, stirring until the system is uniform, and obtaining a finished coating.

3. The method for preparing a stone-like water-based paint according to claim 2, characterized in that: Made from the following raw materials in parts by weight: 0.5-1.5 parts of defoaming agent, 0.5-1.5 parts of wetting agent, 1-3 parts of titanium dioxide, 0.4-0.6 parts of stabilizer, 0.5-1.5 parts of ethylene glycol, 1-2 parts of film former, 0.4-0.6 parts of preservative, 0.4-0.6 parts of fungicide, 10-30 parts of acrylic emulsion, 10-30 parts of quartz stone powder, 10-15 parts of colored sand and 5-15 parts of water.

4. The method for preparing a stone-like water-based paint according to claim 1, characterized in that: The calcination temperature is 900°C.