Color paste for calcium silicate board and preparation method of color paste

Abstract

The invention belongs to the technical field of color paste, and particularly discloses color paste for a calcium silicate board and a preparation method of the color paste, and the color paste comprises the following components: pigment, ethylene glycol, a dispersing agent, a defoaming agent, a thickening agent, a pH regulator and deionized water. According to the invention, 1, 2-epoxy-4-vinyl cyclohexane, tri (dimethylsiloxy) silane, 3-(methacryloxy) propyltrimethoxysilane and hydrogen-containing silicone oil are synthesized to obtain a modified liquid with excellent activity and rich functional groups, carbon black is pretreated, and octene is adsorbed on the surface of the carbon black while the carbon black is subjected to preliminary activity, so that the modified liquid is obtained; according to the present invention, the carbon black is modified with the modification liquid, such that the stability and the dispersibility of the carbon black are effectively improved, the re-aggregation of the carbon black particles during the storage and use process is prevented, the treated carbon black has the good adaptability with the calcium silicate plate, and the adhesion of the coating on the calcium silicate plate can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of color paste, and in particular to a color paste for calcium silicate board and a preparation method thereof. Background Art

[0002] Calcium silicate board, as a building material, is widely used in building interior and exterior walls, ceilings and other fields. It has the advantages of light weight, high strength, fire resistance and moisture resistance.

[0003] However, most calcium silicate boards on the market are single-colored or colorless, and require subsequent coating or coloring processes to improve their aesthetics and decorative effects. Traditional coloring methods have problems such as poor color paste stability and poor adhesion, which makes it difficult to meet the high requirements of modern buildings for decorative effects and service life. Therefore, it is of great practical significance to develop a color paste specifically for calcium silicate boards and a preparation method thereof.

[0004] In view of this, this application is filed. Summary of the invention

[0005] The present invention provides a color paste for a calcium silicate board and a preparation method thereof. The color paste of the present invention has excellent stability and is applied to the calcium silicate board to significantly improve the adhesion and stability of the calcium silicate board.

[0006] The present invention solves the technical problem by adopting the following technical solutions: A color paste for calcium silicate board comprises the following components in parts by weight: 32-40 parts of pigment, 8-15 parts of ethylene glycol, 6-10 parts of dispersant, 0.2-0.5 parts of defoamer, 0.2-0.6 parts of thickener, 0.1-0.4 parts of pH regulator, and 40-50 parts of deionized water.

[0007] As a preferred embodiment of the present invention, the following components are included in parts by weight: 36 parts of pigment, 10 parts of ethylene glycol, 8 parts of dispersant, 0.4 parts of defoamer, 0.5 parts of thickener, 0.2 parts of pH regulator, and 44.9 parts of deionized water.

[0008] As a preferred embodiment of the present invention, the pigment is modified carbon black, and the preparation method of the modified carbon black is: (1) Add 1,2-epoxy-4-vinylcyclohexane, tri(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane and a catalyst to toluene, react at 85-95°C for 2-4 hours, then add hydrogenated silicone oil, react at 75-85°C for 1-3 hours to obtain a modified solution; (2) Add carbon black, oxalic acid and 1-octene into anhydrous ethanol and stir evenly to obtain a premixed solution; (3) Add the modified liquid dropwise into the premixed liquid, stir at 65-85°C for 2-5 hours, ultrasonically treat, and dry to obtain modified carbon black.

[0009] The present invention creatively synthesizes 1,2-epoxy-4-vinylcyclohexane, tri(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane and hydrogenated silicone oil to obtain a modified liquid with excellent activity and rich functional groups, and pre-treats the carbon black, while performing preliminary activation on the carbon black, allowing octene to be adsorbed on the surface of the carbon black, and then the modified liquid performs modification treatment on the carbon black, thereby effectively improving the stability and dispersibility of the carbon black, and preventing the carbon black particles from re-aggregating during storage and use. At the same time, after the carbon black is treated by the present invention, it has better compatibility with the calcium silicate board, and can improve the adhesion of the coating on the calcium silicate board.

[0010] As a preferred embodiment of the present invention, the mass ratio of 1,2-epoxy-4-vinylcyclohexane, tri(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, catalyst, toluene, and hydrogenated silicone oil is 1: (0.5-1.2): (0.2-0.6): (0.02-0.04): (4-10): (0.05-0.2).

[0011] As a preferred embodiment of the present invention, the mass ratio of the carbon black, oxalic acid, 1-octene and anhydrous ethanol is 1: (0.04-0.08): (0.04-0.08): (4-10).

[0012] As a preferred embodiment of the present invention, the mass ratio of the modified liquid to the premixed liquid is (0.1~0.2):1.

[0013] As a preferred embodiment of the present invention, the power of the ultrasonic treatment is 300-600W, and the time of the ultrasonic treatment is 20-40min.

[0014] As a preferred embodiment of the present invention, the dispersant is an organic polymer dispersant containing phosphate; The defoaming agent is a silicone defoaming agent.

[0015] As a preferred embodiment of the present invention, the thickener is bentonite; The pH regulator is triethanolamine.

[0016] The present invention also provides a method for preparing a color paste for a calcium silicate board, comprising the following steps: The dispersant, ethylene glycol and deionized water are stirred evenly by a high-speed disperser, and the pigment is added and stirred evenly to obtain a mixture; the mixture is ground by a sand mill to a particle size of less than 0.25 μm, and then the remaining materials are added and stirred evenly to obtain a color paste for calcium silicate board.

[0017] Beneficial effects of the present invention: the present invention synthesizes 1,2-epoxy-4-vinylcyclohexane, tri(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane and hydrogenated silicone oil to obtain a modified liquid with excellent activity and rich functional groups, pre-treats carbon black, and makes octene adsorbed on the surface of carbon black while performing preliminary activation on the carbon black, and then modifies the carbon black with the modified liquid, thereby effectively improving the stability and dispersibility of the carbon black and preventing the carbon black particles from re-aggregating during storage and use. At the same time, after the carbon black is treated by the present invention, it has better compatibility with the calcium silicate board and can improve the adhesion of the coating on the calcium silicate board. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the present invention, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0020] In the present invention, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0021] In the present invention, there is no particular limitation on the specific dispersion and stirring treatment methods.

[0022] The reagents or instruments used in the present invention without indicating the manufacturer are all conventional products that can be obtained commercially. The raw materials used in the comparative examples and the raw materials used in the parallel experiments of the embodiments are the same commercially available products unless otherwise specified.

[0023] Example 1 A color paste for calcium silicate board comprises the following components in parts by weight: 36 parts of pigment, 10 parts of ethylene glycol, 8 parts of dispersant, 0.4 parts of defoamer, 0.5 parts of bentonite, 0.2 parts of triethanolamine and 44.9 parts of deionized water.

[0024] The dispersant is the dispersant LOPON 826 from Baker Gilliney.

[0025] The defoamer is BYK1790 produced by BYK.

[0026] The pigment is modified carbon black, and the preparation method of the modified carbon black is: (1) 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, and Custer platinum catalyst are added to toluene, reacted at 90°C for 3 hours, and then hydrogenated silicone oil is added, reacted at 80°C for 2 hours to obtain a modified liquid; the mass ratio of the 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, catalyst, toluene, and hydrogenated silicone oil is 1:1:0.5:0.03:5:0.1.

[0027] (2) Add carbon black, oxalic acid, and 1-octene to anhydrous ethanol, stir evenly, and obtain a premixed solution; the mass ratio of the carbon black, oxalic acid, 1-octene, and anhydrous ethanol is 1:0.05:0.05:5.

[0028] (3) Add the modified liquid to the premixed liquid, stir at 70°C for 4 hours, perform ultrasonic treatment at 500W for 30 minutes, and dry to obtain modified carbon black. The mass ratio of the modified liquid to the premixed liquid is 0.15:1.

[0029] The hydrogen-containing silicone oil comes from Shin-Etsu silicone oil, brand KF99.

[0030] The method for preparing the color paste for calcium silicate board comprises the following steps: The dispersant, ethylene glycol and deionized water are stirred evenly by a high-speed disperser, and the pigment is added and stirred evenly to obtain a mixture; the mixture is ground by a sand mill to a particle size of less than 0.25 μm, and then the remaining materials are added and stirred evenly to obtain a color paste for calcium silicate board.

[0031] Example 2 A color paste for calcium silicate board comprises the following components in parts by weight: 32 parts of pigment, 15 parts of ethylene glycol, 6 parts of dispersant, 0.4 parts of defoamer, 0.5 parts of bentonite, 0.2 parts of triethanolamine and 45.9 parts of deionized water.

[0032] The dispersant is the dispersant LOPON 826 from Baker Gilliney.

[0033] The defoamer is BYK1790 produced by BYK.

[0034] The pigment is modified carbon black, and the preparation method of the modified carbon black is: (1) 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, and Custer platinum catalyst are added to toluene, reacted at 90°C for 3 hours, and then hydrogenated silicone oil is added, reacted at 80°C for 2 hours to obtain a modified liquid; the mass ratio of the 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, catalyst, toluene, and hydrogenated silicone oil is 1:1:0.5:0.03:5:0.1.

[0035] (2) Add carbon black, oxalic acid, and 1-octene to anhydrous ethanol, stir evenly, and obtain a premixed solution; the mass ratio of the carbon black, oxalic acid, 1-octene, and anhydrous ethanol is 1:0.05:0.05:5.

[0036] (3) Add the modified liquid to the premixed liquid, stir at 70°C for 4 hours, perform ultrasonic treatment at 500W for 30 minutes, and dry to obtain modified carbon black. The mass ratio of the modified liquid to the premixed liquid is 0.15:1.

[0037] The hydrogen-containing silicone oil comes from Shin-Etsu silicone oil, brand KF99.

[0038] The method for preparing the color paste for calcium silicate board comprises the following steps: The dispersant, ethylene glycol and deionized water are stirred evenly by a high-speed disperser, and the pigment is added and stirred evenly to obtain a mixture; the mixture is ground by a sand mill to a particle size of less than 0.25 μm, and then the remaining materials are added and stirred evenly to obtain a color paste for calcium silicate board.

[0039] Example 3 A color paste for calcium silicate board comprises the following components in parts by weight: 40 parts of pigment, 8 parts of ethylene glycol, 10 parts of dispersant, 0.4 parts of defoamer, 0.5 parts of bentonite, 0.2 parts of triethanolamine and 40.9 parts of deionized water.

[0040] The dispersant is the dispersant LOPON 826 from Baker Gilliney.

[0041] The defoamer is BYK1790 produced by BYK.

[0042] The pigment is modified carbon black, and the preparation method of the modified carbon black is: (1) 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, and Custer platinum catalyst are added to toluene, reacted at 90°C for 3 hours, and then hydrogenated silicone oil is added, reacted at 80°C for 2 hours to obtain a modified liquid; the mass ratio of the 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, catalyst, toluene, and hydrogenated silicone oil is 1:1:0.5:0.03:5:0.1.

[0043] (2) Add carbon black, oxalic acid, and 1-octene to anhydrous ethanol, stir evenly, and obtain a premixed solution; the mass ratio of the carbon black, oxalic acid, 1-octene, and anhydrous ethanol is 1:0.05:0.05:5.

[0044] (3) Add the modified liquid to the premixed liquid, stir at 70°C for 4 hours, perform ultrasonic treatment at 500W for 30 minutes, and dry to obtain modified carbon black. The mass ratio of the modified liquid to the premixed liquid is 0.15:1.

[0045] The hydrogen-containing silicone oil comes from Shin-Etsu silicone oil, brand KF99.

[0046] The method for preparing the color paste for calcium silicate board comprises the following steps: The dispersant, ethylene glycol and deionized water are stirred evenly by a high-speed disperser, and the pigment is added and stirred evenly to obtain a mixture; the mixture is ground by a sand mill to a particle size of less than 0.25 μm, and then the remaining materials are added and stirred evenly to obtain a color paste for calcium silicate board.

[0047] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the pigment of Comparative Example 1 is carbon black (unmodified), and the others are the same.

[0048] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the preparation method of the modified carbon black is different from that of Example 1, and the others are the same.

[0049] The preparation method of the modified carbon black is: (1) Add carbon black, oxalic acid and 1-octene to anhydrous ethanol and stir evenly to obtain a premixed solution; the mass ratio of the carbon black, oxalic acid, 1-octene and anhydrous ethanol is 1:0.05:0.05:5.

[0050] (2) Add 3-(isomethacryloyloxy)propyltrimethoxysilane to the premixed liquid, stir at 70°C for 4 hours, ultrasonically treat at 500W for 30 minutes, and dry to obtain modified carbon black. The mass ratio of 3-(isomethacryloyloxy)propyltrimethoxysilane to the premixed liquid is 0.15:1.

[0051] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the preparation method of the modified carbon black is different from that of Example 1, and the others are the same.

[0052] The preparation method of the modified carbon black is: (1) Add carbon black, oxalic acid and 1-octene to anhydrous ethanol and stir evenly to obtain a premixed solution; the mass ratio of the carbon black, oxalic acid, 1-octene and anhydrous ethanol is 1:0.05:0.05:5.

[0053] (2) Add 1,2-epoxy-4-vinylcyclohexane to the premixed liquid, stir at 70°C for 4 hours, ultrasonically treat at 500W for 30 minutes, and dry to obtain modified carbon black. The mass ratio of 1,2-epoxy-4-vinylcyclohexane to the premixed liquid is 0.15:1.

[0054] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that the preparation method of the modified carbon black is different from that of Example 1, and the others are the same.

[0055] The preparation method of the modified carbon black is: (1) 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, and Custer platinum catalyst are added to toluene, reacted at 90°C for 3 hours, and then hydrogenated silicone oil is added, reacted at 80°C for 2 hours to obtain a modified liquid; the mass ratio of the 1,2-epoxy-4-vinylcyclohexane, tris(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, catalyst, toluene, and hydrogenated silicone oil is 1:1:0.5:0.03:5:0.1.

[0056] (2) Add carbon black to the modified liquid, stir at 70°C for 4 hours, perform ultrasonic treatment at 500W for 30 minutes, and dry to obtain modified carbon black. The mass ratio of carbon black to modified liquid is 1:2.

[0057] Test Case 1. The color pastes prepared in the examples and comparative examples were placed at 25° C. for 180 days, and the stability of the pigment color pastes was determined by visually observing whether there was obvious precipitation, flocculation, stratification, or agglomeration of pigment particles.

[0058] 2. Weigh the following weight ratio: 50 parts of acrylate, 15 parts of dipropylene glycol diacrylate, 10 parts of color paste, 0.5 parts of fumed silica, 4 parts of initiator TPO, 0.5 parts of BYK320, and talcum powder to 100 parts. Prepare the test coating, in which the color paste is the color paste of the embodiment and the comparative example respectively.

[0059] The test coating was applied to the surface of calcium silicate board and the adhesion (100 grids) and cycle stability were tested.

[0060] The cyclic stability test method is to put the calcium silicate board into a hot and cold cycle, cycle at 50℃ for 12h, cycle at -18℃ for 12h, cycle for 14d, and observe whether the coating is broken or cracked.

[0061] Table 1

[0062] It can be seen from Table 1 that the color paste of the present invention has excellent stability, and when applied to calcium silicate board, it can significantly improve the adhesion and stability of the calcium silicate board.

[0063] Finally, it should be noted that the above embodiments are intended to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A color paste for calcium silicate board, characterized in that: The invention comprises the following components in parts by weight: 32-40 parts of pigment, 8-15 parts of ethylene glycol, 6-10 parts of dispersant, 0.2-0.5 parts of defoamer, 0.2-0.6 parts of thickener, 0.1-0.4 parts of pH regulator and 40-50 parts of deionized water.

2. The color paste for calcium silicate board according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 36 parts of pigment, 10 parts of ethylene glycol, 8 parts of dispersant, 0.4 parts of defoamer, 0.5 parts of thickener, 0.2 parts of pH regulator and 44.9 parts of deionized water.

3. The color paste for calcium silicate board according to claim 1, characterized in that: The pigment is modified carbon black, and the preparation method of the modified carbon black is: (1) Add 1,2-epoxy-4-vinylcyclohexane, tri(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane and a catalyst to toluene, react at 85-95°C for 2-4 hours, then add hydrogenated silicone oil, react at 75-85°C for 1-3 hours to obtain a modified solution; (2) Add carbon black, oxalic acid and 1-octene into anhydrous ethanol and stir evenly to obtain a premixed solution; (3) Add the modified liquid dropwise into the premixed liquid, stir at 65-85°C for 2-5 hours, ultrasonically treat, and dry to obtain modified carbon black.

4. The color paste for calcium silicate board according to claim 3, characterized in that: The mass ratio of the 1,2-epoxy-4-vinylcyclohexane, tri(dimethylsiloxy)silane, 3-(isobutyleneoxy)propyltrimethoxysilane, catalyst, toluene and hydrogenated silicone oil is 1:(0.5-1.2):(0.2-0.6):(0.02-0.04):(4-10):(0.05-0.2).

5. The color paste for calcium silicate board according to claim 3, characterized in that: The mass ratio of the carbon black, oxalic acid, 1-octene and anhydrous ethanol is 1: (0.04-0.08): (0.04-0.08): (4-10).

6. The color paste for calcium silicate board according to claim 3, characterized in that: The mass ratio of the modified liquid to the premixed liquid is (0.1~0.2):

1.

7. The color paste for calcium silicate board according to claim 3, characterized in that: The power of the ultrasonic treatment is 300-600W, and the time of the ultrasonic treatment is 20-40min.

8. The color paste for calcium silicate board according to claim 1, characterized in that: The dispersant is an organic polymer dispersant containing phosphate; The defoaming agent is a silicone defoaming agent.

9. The color paste for calcium silicate board according to claim 1, characterized in that: The thickener is bentonite; The pH regulator is triethanolamine.

10. The method for preparing the color paste for calcium silicate board according to any one of claims 1 to 9, characterized in that: The following steps are involved: The dispersant, ethylene glycol and deionized water are stirred evenly by a high-speed disperser, and the pigment is added and stirred evenly to obtain a mixture; the mixture is ground by a sand mill to a particle size of less than 0.25 μm, and then the remaining materials are added and stirred evenly to obtain a color paste for calcium silicate board.

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