High-toughness batch scraping type sand-in-water multicolor paint and preparation method thereof

Abstract

The invention discloses a high-toughness batch scraping type sand-in-water multicolor paint and a preparation method thereof.The preparation method comprises the steps that 50-70 parts of base paint is toned according to stone color points by adopting self-made base paint, a protection glue solution and a continuous phase; sequentially adding the toned base paint into 20-30 parts of the protective glue solution according to the color of the stone, cutting by using a dispersion disc, adding small points and cutting firstly, and adding large points and then cutting; and after the color points are cut, adding 9-15 parts of a continuous phase and 1-5 parts of 100-mesh glass beads, uniformly stirring, and discharging to obtain the high-toughness batch scraping type sand-in-water multicolor paint. The paint is high in color point strength, good in toughness, capable of being scraped in batches and good in using effect.

Description

Technical Field

[0001] The invention relates to the field of coatings, in particular to a high-toughness scraping type water-coated sand multi-color paint and a preparation method thereof. Background Art

[0002] At present, the main exterior wall imitation stone coatings are real stone paint and colorful paint. Among them, the most textured and imitation stone effect is the water-in-sand paint in the colorful paint. Compared with traditional imitation stone paints such as real stone paint and water-in-water colorful paint, the water-in-sand colorful paint has made a qualitative leap in simulation and performance. It is made of real materials, and the layering and texture of the pattern are more realistic, close to the original stone, and it is not affected by the base surface shape. It is suitable for a variety of base materials and can be painted according to the shape of the building (such as special-shaped surface, concave and convex surface, curved surface, etc.), giving free play to the architect's creative inspiration.

[0003] The components of water-based sand paint are base paint, protective glue and continuous phase. The base paint is the carrier of color matching. The color and texture of the base paint will affect the final color and effect of the multi-color paint; the protective glue can keep the color particles in the multi-color paint in a stable dispersed state, prevent the color particles from agglomerating, precipitating or changing color, thereby ensuring the color effect and quality of the multi-color paint; the continuous phase is the basis of the multi-color paint, which provides a carrier for the dispersed phase, so that the dispersed phase can be evenly dispersed in it to form a stable multi-color particle dispersion system.

[0004] At present, the existing water-based sand-based colorful paints on the market contain high-density colored sand, which easily causes the problem of colored particles settling. At the same time, when the water-based sand-based paint does not wrap the colored sand strongly enough, the colored particles are prone to problems such as fragility and color bleeding. The colored dots are not tough enough and have a low consistency. When using a trowel for construction, you cannot apply it hard and it is easy to become a mess, and the construction effect and color difference cannot be controlled. Summary of the invention

[0005] The purpose of the present invention is to provide a high-toughness scraping type water-coated sand multi-color paint and a preparation method thereof in view of the deficiencies in the prior art. The paint has high color point strength and good toughness, can be scraped, and has good use effect.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] Firstly, the present invention provides a base phase emulsion, which comprises the following raw materials in parts by weight: 55-70 parts of water, 15-25 parts of methyl methacrylate, 1-5 parts of styrene, 0.1-1 parts of methacrylic acid, 5-15 parts of isooctyl acrylate, 0.5-2 parts of diacetone acrylamide, 0.5-1.5 parts of polyvinyl alcohol, 0.1-1 parts of emulsifier, 0.5-1.5 parts of silane coupling agent, 0.01-0.1 parts of ammonium persulfate, 0.1-1 parts of adipic acid dihydrazide, 0.01-0.05 parts of boric acid and 0.1-0.5 parts of preservative MBS.

[0008] Secondly, the present invention provides a method for preparing the above-mentioned base phase emulsion, comprising the following steps:

[0009] Mix 100% of an emulsifier, 10% of methyl methacrylate, 20% of styrene, 100% of methacrylic acid, 10% of isooctyl acrylate, 100% of diacetone acrylamide and an appropriate amount of water and stir evenly to form a pre-emulsified solution;

[0010] Put 100% polyvinyl alcohol and an appropriate amount of water in a reaction container, heat it to 88-90°C, stir until the polyvinyl alcohol is dissolved, cool it to 70-72°C, add 5-15% ammonium persulfate, stir and mix evenly, heat it to 80-82°C, slowly and uniformly add the pre-emulsified solution, control the dropping time to 30 minutes, and continue to keep warm and stir for 30 minutes after the dropping is completed to form a prepolymer solution;

[0011] 90% of methyl methacrylate, 80% of styrene, 90% of isooctyl acrylate and 100% of silane coupling agent were mixed and stirred evenly, and then added dropwise to the prepolymer solution together with 50-65% of ammonium persulfate, and the adding time was controlled to be 4 hours; 30-35% of ammonium persulfate was added continuously, and the adding time was controlled to be 5 minutes; the pH value of the system was adjusted to 6.5-7.5, and then 100% of adipic acid dihydrazide was added, and the adding time was controlled to be 2 minutes, and the temperature was raised to 85°C and stirred for reaction for 1 hour to obtain a prepolymer emulsion;

[0012] Add 100% of boric acid and 100% of preservative to the prepolymer emulsion, stir and disperse, cool to room temperature, discharge, and obtain a base phase emulsion.

[0013] Furthermore, the solid content of the base phase emulsion is 35-37%, and the glass transition temperature is 20-23°C.

[0014] Third, the present invention provides a basic paint, which includes the following raw materials in parts by weight: 20 to 30 parts of water, 10 to 20 parts of base phase emulsion, 1 to 5 parts of 8wt% lithium magnesium silicate aqueous solution, 5 to 10 parts of 60-mesh snowflake white sand, 10 to 20 parts of 80-mesh snowflake white sand, 20 to 30 parts of 90-mesh snowflake white sand, 1 to 10 parts of 100-mesh glass microbeads, 0.1 to 1 part of titanium dioxide, 5 to 10 parts of kaolin, 0.5 to 1 part of hydroxyethyl cellulose, 0.1 to 0.3 parts of dispersant, 0.05 to 0.2 parts of defoaming agent, 0.1 to 0.3 parts of preservative MBS, 0.1 to 0.3 parts of preservative MV, 0.1 to 1.5 parts of film-forming aid H-285 and 0.1 to 1 part of antifreeze.

[0015] Furthermore, the hydroxyethyl cellulose is composed of HE-10k cellulose, 250HHBR cellulose and DC-600 cellulose in a mass ratio of 15:20:30.

[0016] Fourthly, the present invention provides a continuous phase emulsion, which includes the following raw materials in parts by weight: 50-70 parts of water, 0.1-1 part of emulsifier, 20-30 parts of methyl methacrylate, 0.1-1 part of methacrylic acid, 5-10 parts of isooctyl acrylate, 0.5-2 parts of diacetone acrylamide, 0.5-1.5 parts of silane coupling agent, 0.01-0.1 part of ammonium persulfate, 0.1-1 part of adipic acid dihydrazide and 0.1-0.5 part of preservative MBS.

[0017] Fifth, the present invention provides a method for preparing a continuous phase emulsion, comprising the following steps:

[0018] Mix and stir 100% of an emulsifier, 10% of methyl methacrylate, 100% of methacrylic acid, 10% of isooctyl acrylate, 100% of diacetone acrylamide and an appropriate amount of water to form a pre-emulsified solution;

[0019] Heat an appropriate amount of water to 80°C, add 6-15% of ammonium persulfate, stir and mix evenly, heat to 80-82°C, slowly and evenly drip the pre-emulsified solution, control the dripping time to 30 minutes, and continue to keep warm and stir for 30 minutes after the dripping is completed to form a prepolymer solution;

[0020] At 80-82° C., 90% of methyl methacrylate, 90% of isooctyl acrylate and 100% of silane coupling agent are mixed and stirred evenly, and then added dropwise into the prepolymer solution together with 50-65% of ammonium persulfate, and the dropping time is controlled to be 4 hours; 30-35% of ammonium persulfate is continued to be added, and the addition time is controlled to be 5 minutes, and the temperature is raised to 85° C. and stirred for 0.5 hours; the pH value of the system is adjusted to 6.5-7.5, and then 100% of adipic acid dihydrazide is added, and the addition time is controlled to be 2 minutes; the reaction is stirred at 85° C. for 1 hour, 100% of the preservative MBS is added, and the mixture is stirred and mixed evenly, and the temperature is cooled to room temperature, and the material is discharged to obtain a continuous phase emulsion.

[0021] Furthermore, the solid content of the continuous phase emulsion is 33-37%, and the glass transition temperature is 38-42°C.

[0022] Sixth, the present invention provides a continuous phase, which includes the following raw materials in parts by weight: 10 to 20 parts of water, 50 to 70 parts of continuous phase emulsion, 10 to 20 parts of aluminum silicate fiber, 3 to 8 parts of film-forming aid, 0.5 to 1.5 parts of preservative MBS, 0.1 to 0.5 parts of suspending agent, 1 to 3 parts of ethylene glycol, 0.1 to 0.5 parts of defoaming agent NXZ, 0.1 to 1 parts of preservative MV and 0.1 to 1 parts of mildewproofing agent EW-paste.

[0023] Seventhly, the present invention provides a method for preparing a protective glue solution, comprising the following steps: according to the mass parts, 85-90 parts of water, 10-15 parts of lithium magnesium silicate, 0.1-0.5 parts of suspending agent, and 0.1-1 parts of preservative MBS are dispersed evenly at high speed for 30-60 minutes, and then discharged.

[0024] Eighth, the present invention provides a high-toughness scraping type water-coated sand-coated multi-color paint, which includes the following components by weight: 50 to 70 parts of the above-mentioned base paint, 20 to 30 parts of the above-mentioned protective glue solution, 9 to 15 parts of the above-mentioned continuous phase and 1 to 5 parts of 100-mesh glass beads.

[0025] Ninth, the present invention also provides a method for preparing the above-mentioned high-toughness scraping type water-coated sand multi-color paint, comprising the following steps:

[0026] Preparation of base paint: according to the requirements of the formula ratio, water, dispersant, defoamer, titanium dioxide, kaolin, cellulose, preservative MBS, film-forming aid and antifreeze agent are mixed and dispersed at high speed, the pH value of the system is adjusted to 7-9, the base phase emulsion, 8wt% lithium magnesium silicate aqueous solution and preservative MV are added in sequence and dispersed at high speed, and finally 60 mesh snowflake white sand, 80 mesh snowflake white sand, 90 mesh snowflake white sand and 100 mesh glass microbeads are added, mixed and stirred evenly, and then discharged to obtain the base paint;

[0027] Preparation of continuous phase: according to the requirements of the formula ratio, water, preservative MBS and suspending agent are mixed and dispersed at high speed, aluminum silicate fiber, film-forming aid, ethylene glycol and defoamer NXZ are added and dispersed at high speed, continuous phase emulsion, preservative MV and mildew inhibitor EW-PASTE are added in sequence and stirred and mixed evenly, the pH value of the system is adjusted to 7-9, and the material is discharged to obtain a continuous phase;

[0028] Preparation of high-toughness scraping water-based sand-coated multi-color paint: adjust the base paint according to the color points of the stone; add the adjusted base paint into the protective glue solution according to the color of the stone, and cut it with a dispersing disk, with small points cut first and large points cut later; after cutting the color points, add the continuous phase and 100-mesh glass beads, stir evenly, and discharge.

[0029] The hydroxyethyl cellulose in the base paint of the present invention is composed of a mixture of HE-10k cellulose, 250HHBR cellulose and DC-600 cellulose. HE-10K makes the emulsion have an associative effect and enhances the cohesive force of the color dots. 250HHBR can improve the color bleeding during granulation. DC-600 has strong toughness. The three celluloses in the formula are used in combination to improve the problem of insufficient toughness of the color dots in the multi-color paint.

[0030] The present invention adopts a self-made emulsion with a high cross-linking density as a film-forming substance for making the base paint (color dots) and the continuous phase, so that the toughness of the color dots is enhanced. The color dots are strong and not easy to break, so it is convenient to increase the consistency in the finished paint, and the color dots will not become mushy when stirred. Adding sand of different meshes can improve the fusion degree after the surface is dried. The present invention adds a small amount of 60 mesh sand and 100 mesh glass microbeads, which can improve the smoothness of the multi-color paint during the construction process. The color dots are evenly distributed during the application, and the paint can be applied in a similar way to putty, without deliberately changing the operation and construction method. It is simple and easy to apply, and the efficiency is fast. DETAILED DESCRIPTION

[0031] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0032] The reagents or instruments used in the present invention without indicating the manufacturer are all conventional products that can be purchased from the market.

[0033] Example 1

[0034] 1) Preparation of base phase emulsion

[0035]

[0036]

[0037] (2) Preparation of base paint

[0038]

[0039] (3) Preparation of continuous phase emulsion

[0040]

[0041]

[0042] (4) Preparation of continuous phase

[0043]

[0044]

[0045] (5) Preparation of protective glue solution

[0046] (6) Preparation of high-toughness scraping water-coated sand multi-color paint

[0047]

[0048] Example 2

[0049] The difference between Example 2 and Example 1 is that:

[0050] (6) Preparation of high-toughness scraping water-coated sand multi-color paint

[0051]

[0052]

[0053] Example 3

[0054] The difference between Example 3 and Example 1 is that:

[0055] (6) Preparation of high-toughness scraping water-coated sand multi-color paint

[0056]

[0057] Comparative Example 1

[0058] Comparative Example 1 The process of preparing water-based sand multi-color paint is shown in the following table:

[0059]

[0060] Comparative Example 2

[0061] Comparative Example 2 The process of preparing water-based sand multi-color paint is shown in the following table:

[0062]

[0063]

[0064] The water-in-sand multi-color paints prepared in Examples 1 to 3 and Comparative Examples 1 to 2 were subjected to performance tests. The performance test items and standards were in accordance with HG / T4343-2012. The test results are shown in Table 1.

[0065] Table 1

[0066]

[0067] According to the disclosure of the above description, those skilled in the art to which the present invention belongs may also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A high-toughness scraping type water-based sand-coated multi-color paint, characterized in that: The high-toughness scraping type water-based sand-coated multi-color paint comprises the following components by weight: 50-70 parts of base paint, 20-30 parts of protective glue solution, 9-15 parts of continuous phase and 1-5 parts of 100-mesh glass microbeads.

2. The high-toughness scraping type water-based sand multi-color paint according to claim 1 is characterized in that: The base paint comprises the following raw materials in parts by weight: 20-30 parts of water, 10-20 parts of base phase emulsion, 1-5 parts of 8wt% lithium magnesium silicate aqueous solution, 5-10 parts of 60-mesh snowflake white sand, 10-20 parts of 80-mesh snowflake white sand, 20-30 parts of 90-mesh snowflake white sand, 1-10 parts of 100-mesh glass microspheres, 0.1-1 part of titanium dioxide, 5-10 parts of kaolin, 0.5-1 part of hydroxyethyl cellulose, 0.1-0.3 part of dispersant, 0.05-0.2 part of defoamer, 0.1-0.3 part of preservative MBS, 0.1-0.3 part of preservative MV, 0.1-1.5 parts of film-forming aid H-285 and 0.1-1 part of antifreeze agent; The hydroxyethyl cellulose is composed of HE-10k cellulose, 250HHBR cellulose and DC-600 cellulose in a mass ratio of 15:20:

30.

3. The high-toughness scraping type water-based sand multi-color paint according to claim 2 is characterized in that: The base phase emulsion comprises the following raw materials in parts by weight: 55-70 parts of water, 15-25 parts of methyl methacrylate, 1-5 parts of styrene, 0.1-1 parts of methacrylic acid, 5-15 parts of isooctyl acrylate, 0.5-2 parts of diacetone acrylamide, 0.5-1.5 parts of polyvinyl alcohol, 0.1-1 parts of emulsifier, 0.5-1.5 parts of silane coupling agent, 0.01-0.1 parts of ammonium persulfate, 0.1-1 parts of adipic acid dihydrazide, 0.01-0.05 parts of boric acid and 0.1-0.5 parts of preservative MBS.

4. The high-toughness scraping type water-based sand multi-color paint according to claim 3 is characterized in that: The base phase emulsion is prepared by the following steps: Mix 100% of an emulsifier, 10% of methyl methacrylate, 20% of styrene, 100% of methacrylic acid, 10% of isooctyl acrylate, 100% of diacetone acrylamide and an appropriate amount of water and stir evenly to form a pre-emulsified solution; Put 100% polyvinyl alcohol and an appropriate amount of water in a reaction container, heat it to 88-90°C, stir until the polyvinyl alcohol is dissolved, cool it to 70-72°C, add 5-15% ammonium persulfate, stir and mix evenly, heat it to 80-82°C, slowly and uniformly add the pre-emulsified solution, control the dropping time to 30 minutes, and continue to keep warm and stir for 30 minutes after the dropping is completed to form a prepolymer solution; 90% of methyl methacrylate, 80% of styrene, 90% of isooctyl acrylate and 100% of silane coupling agent were mixed and stirred evenly, and then added dropwise to the prepolymer solution together with 50-65% of ammonium persulfate, and the adding time was controlled to be 4 hours; 30-35% of ammonium persulfate was added continuously, and the adding time was controlled to be 5 minutes; the pH value of the system was adjusted to 6.5-7.5, and then 100% of adipic acid dihydrazide was added, and the adding time was controlled to be 2 minutes, and the temperature was raised to 85°C and stirred for reaction for 1 hour to obtain a prepolymer emulsion; Add 100% of boric acid and 100% of preservative to the prepolymer emulsion, stir and disperse, cool to room temperature, discharge, and obtain a base phase emulsion.

5. The high-toughness scraped water-in-sand multi-color paint according to claim 3 is characterized in that: The solid content of the base phase emulsion is 35-37%, and the glass transition temperature is 20-23°C.

6. The high-toughness scraped water-in-sand multi-color paint according to claim 1, characterized in that: The protective glue solution is prepared by the following steps: according to the mass parts, 85-90 parts of water, 10-15 parts of lithium magnesium silicate, 0.1-0.5 parts of suspending agent, and 0.1-1 parts of preservative MBS are uniformly dispersed at high speed for 30-60 minutes, and then discharged.

7. The high-toughness scraping type water-based sand multi-color paint according to claim 1 is characterized in that: The continuous phase comprises the following raw materials in parts by weight: 10 to 20 parts of water, 50 to 70 parts of continuous phase emulsion, 10 to 20 parts of aluminum silicate fiber, 3 to 8 parts of film-forming aid, 0.5 to 1.5 parts of preservative MBS, 0.1 to 0.5 parts of suspending agent, 1 to 3 parts of ethylene glycol, 0.1 to 0.5 parts of defoaming agent NXZ, 0.1 to 1 parts of preservative MV and 0.1 to 1 parts of mildewproofing agent EW-paste.

8. The high-toughness scraping type water-based sand multi-color paint according to claim 7 is characterized in that: The continuous phase emulsion comprises the following raw materials in parts by weight: 50-70 parts of water, 0.1-1 part of emulsifier, 20-30 parts of methyl methacrylate, 0.1-1 part of methacrylic acid, 5-10 parts of isooctyl acrylate, 0.5-2 parts of diacetone acrylamide, 0.5-1.5 parts of silane coupling agent, 0.01-0.1 part of ammonium persulfate, 0.1-1 part of adipic acid dihydrazide and 0.1-0.5 part of preservative MBS.

9. The high-toughness scraping type water-based sand multi-color paint according to claim 8, characterized in that: The continuous phase emulsion is prepared by the following steps: Mix and stir 100% of an emulsifier, 10% of methyl methacrylate, 100% of methacrylic acid, 10% of isooctyl acrylate, 100% of diacetone acrylamide and an appropriate amount of water to form a pre-emulsified solution; Heat an appropriate amount of water to 80°C, add 6-15% of ammonium persulfate, stir and mix evenly, heat to 80-82°C, slowly and evenly drip the pre-emulsified solution, control the dripping time to 30 minutes, and continue to keep warm and stir for 30 minutes after the dripping is completed to form a prepolymer solution; At 80-82°C, 90% of methyl methacrylate, 90% of isooctyl acrylate and 100% of silane coupling agent were mixed and stirred evenly, and then added dropwise to the prepolymer solution together with 50-65% of ammonium persulfate, and the dropping time was controlled to be 4 hours; 30-35% of ammonium persulfate was continued to be added, and the addition time was controlled to be 5 minutes, and the temperature was raised to 85°C and stirred for 0.5 hours; the pH value of the system was adjusted to 6.5-7.5, and then 100% of adipic acid dihydrazide was added, and the addition time was controlled to be 2 minutes; the reaction was stirred at 85°C for 1 hour, and 100% of the preservative MBS was added, and the mixture was stirred and mixed evenly, and the temperature was cooled to room temperature, and the material was discharged to obtain a continuous phase emulsion; The solid content of the continuous phase emulsion is 33-37%, and the glass transition temperature is 38-42°C.

10. A method for preparing the high-toughness scraping type water-coated sand multi-color paint according to any one of claims 1 to 9, characterized in that: The steps include: Preparation of base paint: according to the requirements of the formula ratio, water, dispersant, defoamer, titanium dioxide, kaolin, cellulose, preservative MBS, film-forming aid and antifreeze agent are mixed and dispersed at high speed, the pH value of the system is adjusted to 7-9, the base phase emulsion, 8wt% lithium magnesium silicate aqueous solution and preservative MV are added in sequence and dispersed at high speed, and finally 60 mesh snowflake white sand, 80 mesh snowflake white sand, 90 mesh snowflake white sand and 100 mesh glass microbeads are added, mixed and stirred evenly, and then discharged to obtain the base paint; Preparation of continuous phase: according to the requirements of the formula ratio, water, preservative MBS and suspending agent are mixed and dispersed at high speed, aluminum silicate fiber, film-forming aid, ethylene glycol and defoamer NXZ are added and dispersed at high speed, continuous phase emulsion, preservative MV and mildew inhibitor EW-PASTE are added in sequence and stirred and mixed evenly, the pH value of the system is adjusted to 7-9, and the material is discharged to obtain a continuous phase; Preparation of high-toughness scraping water-based sand-coated multi-color paint: adjust the base paint according to the color points of the stone; add the adjusted base paint into the protective glue solution according to the color of the stone, and cut it with a dispersing disk, with small points cut first and large points cut later; after cutting the color points, add the continuous phase and 100-mesh glass beads, stir evenly, and discharge.

Images