Colorful desert sand, preparation method and application thereof

Abstract

The present application provides a kind of colored desert sand and its preparation method and application, the colored desert sand includes the product after calcination of component A and component B;With weight parts, the colored desert sand includes 80-100 parts component A and 4-6 parts component B;The component A includes pretreated desert sand;Component B includes epoxy modified silicone emulsion and lithium silicate.In the present application, pretreated desert sand is used, then it is mixed with component B and calcined, the colored desert sand obtained, not only can solve the problem of paint film alkali, poor durability caused by high mud content, strong alkalinity and poor strength of desert sand itself, but also has good imitation stone effect, stable coating performance, can replace natural color sand and artificial color sand, realize the effective use of desert sand.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coatings, and particularly relates to a colored desert sand as well as a preparation method and application thereof. BACKGROUND

[0002] Real stone paint is a kind of decorative paint with a decorative effect similar to that of marble and granite. Compared with traditional pasting of ceramic tiles and dry hanging of stone materials, real stone paint is widely used due to its convenient construction, low cost, safety and environmental protection, and high decorative effect of stone imitation. However, the natural colored sand used in the real stone paint product at the present stage is a non-renewable resource. With the increasing use of the real stone paint in the market year by year, the natural colored sand resource is gradually depleted. In addition, the artificial colored sand currently used is mainly obtained by dyeing white sand. The white sand ore also belongs to a non-renewable resource and also faces the problem of gradual depletion. Moreover, with the promotion of national environmental protection policies and the requirement of ecological environment protection, the mining of natural colored sand and white sand is becoming more and more difficult. Therefore, the market urgently needs a product that can replace colored sand to meet the use requirements of real stone paint.

[0003] At present, desertification and sand hazards are serious, and desert sand resources are abundant. Effective use of existing desert sand not only helps to govern the current desertification problem and realize the unification of ecological and economic benefits, but also effectively alleviates the current situation of lack of sand resources for real stone paint.

[0004] The main component of desert sand is quartz, and a small amount of feldspar and muscovite. Its source is mainly the residual minerals of sandstone and granite weathering, which is essentially a low-quality quartz sand with similar chemical composition to silicate raw materials, only the proportion is different. A lot of work has been done on the research and development of desert sand materials at home and abroad. At present, there are five main categories of desert sand materials: building materials, glass and microcrystalline glass, industrial ceramics, functional materials and chemically extracted oxide powders. These materials play an extremely important role in industrial and civil fields. Among them, the building materials mainly include sand road materials, cement clinker and concrete, and there are few applications in coatings.

[0005] In addition, the common defect in the prior art is to directly add desert sand into the coating. However, the desert sand itself has high mud content, strong alkalinity and poor strength, and direct application in coatings can easily lead to blistering of the paint film and poor durability.

[0006] Therefore, it is an urgent problem in the field to develop a desert sand that can replace natural colored sand, reduce the amount of colored sand, has good water resistance, alkali resistance and mechanical stability, and obtain a stone-imitating coating with better performance. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application aims to provide a kind of colored desert sand and its preparation method and application.The colored desert sand has low water content, good water resistance, good alkali resistance, good mechanical stability, and various colors, which can reduce the amount of natural color sand in real stone paint and achieve diversified stone-like effect, and the performance of the obtained real stone paint is better.

[0008] To achieve this purpose, the present application adopts the following technical solutions:

[0009] In the first aspect, the present application provides a kind of colored desert sand, which includes the product after calcination of component A and component B; the colored desert sand includes 80-100 parts of component A and 4-6 parts of component B by weight; the component A includes pretreated desert sand; the component B includes epoxy-modified silicone emulsion and lithium silicate.

[0010] In the present application, by using pretreated desert sand and then mixing it with component B for calcination, the obtained colored desert sand not only solves the problem of paint film alkali bleeding and poor durability caused by high mud content, strong alkalinity and poor strength of desert sand, but also has good stone-like effect and stable paint performance, which can replace natural color sand and artificial color sand and realize effective utilization of desert sand.

[0011] In the present application, the 80-100 parts of component A can be, for example, 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 100 parts, etc.

[0012] In the present application, the 4-6 parts of component B can be, for example, 4 parts, 4.1 parts, 4.2 parts, 4.3 parts, 4.4 parts, 4.5 parts, 4.6 parts, 4.7 parts, 4.8 parts, 4.9 parts, 5 parts, 5.1 parts, 5.2 parts, 5.3 parts, 5.4 parts, 5.5 parts, 5.6 parts, 5.7 parts, 5.8 parts, 5.9 parts, 6 parts, etc.

[0013] Preferably, the pretreatment agent of the pretreated desert sand includes a non-ionic surfactant and an acid.

[0014] Preferably, in the pretreated desert sand, the mass ratio of untreated desert sand to non-ionic surfactant to acid is 50:(8-10):(5-8); wherein the specific value in (8-10) can be, for example, 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10, etc.; the specific value in (5-8) can be, for example, 5, 5.2, 5.4, 5.6, 5.8, 6, 6.2, 6.4, 6.6, 6.8, 7, 7.2, 7.4, 7.6, 7.8, 8, etc.

[0015] Preferably, the non-ionic surfactant comprises at least one of long-chain fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene alkylamine, polyoxyethylene alkylamide or polyether, and further preferably alkylphenol polyoxyethylene ether.

[0016] Preferably, the acid comprises oxalic acid and / or acetic acid.

[0017] Preferably, the mass fraction of the acid is 10-20%, for example, 10%, 12%, 14%, 16%, 18%, 20%, etc.

[0018] In the present application, the acid exists in the form of acid aqueous solution, and the mass ratio of the untreated desert sand to the non-ionic surfactant and the acid aqueous solution is 50:(8-10):(5-8).

[0019] Preferably, the pretreated desert sand comprises pretreated desert sand with a particle size of 80-120 mesh and / or pretreated desert sand with a particle size of 120-180 mesh.

[0020] In the present application, the pretreated desert sand is prepared by the following method, which comprises: mixing a formula amount of non-ionic surfactant, acid and solvent to obtain a mixed solution, and using the mixed solution to clean the desert sand to remove dust, impurities, etc. in the desert sand; after cleaning, drying and sieving at 40-60℃, the sieving screen is arranged from top to bottom in the order of 50 mesh, 80 mesh, 100 mesh, 120 mesh and 180 mesh, and the sieved sand is classified as 80-120 mesh and 120-180 mesh; and the pretreated desert sand with a particle size of 80-120 mesh and the pretreated desert sand with a particle size of 120-180 mesh are obtained.

[0021] In the present application, the solvent comprises water, and the amount of the water is 85-95 parts by weight, for example, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, 90 parts, 91 parts, 92 parts, 93 parts, 94 parts, 95 parts, etc., based on 50 parts by weight of the untreated desert sand.

[0022] Preferably, component B comprises 20-30 parts (for example, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, etc.) of epoxy-modified silicone emulsion and 35-45 parts of lithium silicate (for example, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, etc.), by weight.

[0023] Preferably, component B further comprises at least one of wetting agent, reinforcing agent, anti-cracking agent, film-forming aid, filler and toner.

[0024] In the present application, the wetting agent in the B component includes but is not limited to non-ionic phenolic or alkyl polyoxyethylene ether; the reinforcing agent includes but is not limited to polyether modified organosiloxane; the anti-cracking agent includes but is not limited to polysiloxane emulsion; the film forming aid includes but is not limited to alcohol ester twelve, ethylene glycol monobutyl ether, etc.; the filler includes but is not limited to kaolin, talc, etc.; the color powder includes but is not limited to chromium oxide green, titanium chromium brown, zinc iron yellow, manganese iron black, titanium nickel yellow, iron red, etc. (color powder can be added according to actual needs).

[0025] Preferably, the component B includes wetting agent 0.2-0.3 parts by weight, for example, it can be 0.2 parts, 0.21 parts, 0.22 parts, 0.23 parts, 0.24 parts, 0.25 parts, 0.26 parts, 0.27 parts, 0.28 parts, 0.29 parts, 0.3 parts, etc.

[0026] Preferably, the component B includes reinforcing agent 0.15-0.3 parts by weight, for example, it can be 0.15 parts, 0.16 parts, 0.18 parts, 0.2 parts, 0.21 parts, 0.22 parts, 0.23 parts, 0.24 parts, 0.25 parts, 0.26 parts, 0.27 parts, 0.28 parts, 0.29 parts, 0.3 parts, etc.

[0027] Preferably, the component B includes anti-cracking agent 0.15-0.3 parts by weight, for example, it can be 0.15 parts, 0.16 parts, 0.18 parts, 0.2 parts, 0.21 parts, 0.22 parts, 0.23 parts, 0.24 parts, 0.25 parts, 0.26 parts, 0.27 parts, 0.28 parts, 0.29 parts, 0.3 parts, etc.

[0028] Preferably, the component B includes color powder 0.05-0.3 parts by weight, for example, it can be 0.05 parts, 0.06 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.16 parts, 0.18 parts, 0.2 parts, 0.21 parts, 0.22 parts, 0.23 parts, 0.24 parts, 0.25 parts, 0.26 parts, 0.27 parts, 0.28 parts, 0.29 parts, 0.3 parts, etc.

[0029] Preferably, the component B includes filler 0.2-0.3 parts by weight, for example, it can be 0.2 parts, 0.21 parts, 0.22 parts, 0.23 parts, 0.24 parts, 0.25 parts, 0.26 parts, 0.27 parts, 0.28 parts, 0.29 parts, 0.3 parts, etc.

[0030] In the present application, the preparation method of the component B includes:

[0031] After dispersing the lithium silicate with the solvent and optionally the wetting agent, the reinforcing agent or the anti-cracking agent at a rotation speed of 500-700 rpm for 2-8 min, the optional color powder and the filler are added thereto and dispersed at 1200-1700 rpm for 20-40 min, the epoxy-modified silicone emulsion and the optional film-forming aid are added and continue to be dispersed at 600-800 rpm for 2-8 min to obtain component B.

[0032] In the present application, the solvent includes water, and the weight fraction of the water is 30-40 parts, for example, it can be 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, etc.

[0033] In a second aspect, the present application provides a preparation method of the colored desert sand according to the first aspect, and the preparation method comprises the following steps:

[0034] Mixing component A with component B, calcining to obtain the colored desert sand.

[0035] Preferably, the calcination temperature is 450-550℃, for example, it can be 450℃, 452℃, 458℃, 460℃, 462℃, 465℃, 468℃, 470℃, 472℃, 475℃, 478℃, 480℃, 482℃, 485℃, 488℃, 490℃, 495℃, 500℃, 510℃, 520℃, 530℃, 540℃, 550℃, etc., preferably 470-490℃.

[0036] Preferably, the calcination time is 20-30 min, for example, it can be 20 min, 21 min, 22 min, 23 min, 24 min, 25 min, 26 min, 27 min, 28 min, 29 min, 30 min, etc.

[0037] Preferably, before the calcination, the mixture of component A and component B is further dried.

[0038] Preferably, the drying temperature is 70-90℃, for example, it can be 70℃, 72℃, 74℃, 76℃, 78℃, 80℃, 82℃, 84℃, 86℃, 88℃, 90℃, etc., and the time is 5-15 min, for example, it can be 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, 11 min, 12 min, 13 min, 14 min, 15 min, etc.

[0039] In a third aspect, the present application provides a real stone paint, which comprises, in parts by weight, 14-17 parts of emulsion (for example, it can be 14 parts, 14.5 parts, 15 parts, 15.5 parts, 16 parts, 16.5 parts, 17 parts, etc.), 35-50 parts of colored desert sand (for example, it can be 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts, etc.), and 35-50 parts (for example, it can be 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts, etc.) of natural color sand; the colored desert sand comprises the colored desert sand according to the first aspect.

[0040] Preferably, the emulsion comprises a silicone-acrylate emulsion.

[0041] Preferably, the real stone paint further comprises at least one of a bactericide, a cellulose ether, a bentonite, a multifunctional amine auxiliary agent, a film-forming auxiliary agent, a defoaming agent, or a thickening agent.

[0042] In the present application, the bactericide in the real stone paint comprises but is not limited to isothiazolinones, benzisothiazolinones, etc.; the multifunctional amine auxiliary agent comprises but is not limited to organic amines, ammonia, etc.; the film-forming auxiliary agent comprises but is not limited to alcohol ester twelve, ethylene glycol monobutyl ether, etc.; the defoaming agent comprises but is not limited to organosilicon, mineral oil, etc.; and the thickening agent comprises but is not limited to polyurethane thickening agent, alkali-swellable thickening agent, etc.

[0043] Preferably, the real stone paint further comprises, in parts by weight, 0.09-0.15 parts of bactericide (for example, it can be 0.09 parts, 0.1 parts, 0.11 parts, 0.12 parts, 0.13 parts, 0.14 parts, 0.15 parts, etc.), 0.12-0.15 parts of cellulose ether (for example, it can be 0.12 parts, 0.13 parts, 0.14 parts, 0.15 parts, etc.), 0.06-0.09 parts of bentonite (for example, it can be 0.06 parts, 0.07 parts, 0.08 parts, 0.09 parts, etc.), 0.08-0.1 parts of multifunctional amine auxiliary agent (for example, it can be 0.08 parts, 0.09 parts, 0.1 parts, etc.), 0.16-0.25 parts of film-forming auxiliary agent (for example, it can be 0.16 parts, 0.17 parts, 0.18 parts, 0.19 parts, 0.2 parts, 0.21 parts, 0.22 parts, 0.23 parts, 0.24 parts, 0.25 parts, etc.), 0.03-0.06 parts of defoaming agent (for example, it can be 0.03 parts, 0.04 parts, 0.05 parts, 0.06 parts, etc.), and 0.07-0.1 parts of thickening agent (for example, it can be 0.07 parts, 0.08 parts, 0.09 parts, 0.1 parts, etc.).

[0044] The numerical ranges recited herein are inclusive of the endpoints and of any range that would be formed by the inclusion of the endpoints. To the extent that any numerical ranges are set forth herein, they have been presented with the precision that is reasonably supportable by the numbers used, and no implied precision is to be understood therein.

[0045] Compared with the prior art, the present application has the following beneficial effects:

[0046] The color desert sand provided by the present application solves the problems of strong alkalinity, high clay content and poor strength of desert sand when directly applied, has rich and diverse colors, can achieve various stone imitation effects, can replace natural color sand, is not affected by mineral sources, has stable color and quality between batches, has simple operation process and low cost, increases the utilization of desert sand, reduces the development of natural color sand mineral resources, and protects the environment. DETAILED DESCRIPTION

[0047] The technical solutions of the present application will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments are only used to help understand the present application and should not be regarded as specific limitations on the present application.

[0048] The materials used in the present application are as follows:

[0049] Component B

[0050] Wetting agent: Runhong Chemical PE-100; Reinforcing agent: Yingsui Chemical YR-965; Anti-cracking agent: Polysiloxane emulsion, Shanghai Luodeng Industry Co., Ltd. BS1306CN; Filler: 4000-mesh talc powder, Xinmater; Film-forming aid: alcohol ester twelve; Epoxy modified silicone emulsion: KGF-916, Anhui Keguang New Material.

[0051] Real stone paint

[0052] Bactericide: KATHON LXE, Dow; Defoaming agent: NOPCO NXZ, Nopco; Functional amine aid: AMP-95; Thickening agent: Yaleshun RM-8W; Film-forming aid: alcohol ester twelve; Silicone-acrylate emulsion: RS-3799, Badifu; Natural color sand: Zhaofeng Mineral Products; Artificial color sand: Zhaofeng Mineral Products.

[0053] Preparation Example 1

[0054] A kind of pretreated desert sand, the preparation method of the pretreated desert sand comprises:

[0055] Mix 9 parts of alkyl phenol polyoxyethylene ether, 6 parts of oxalic acid solution (mass fraction 15%) and 90 parts of water to obtain a mixed solution, use the mixed solution to clean 50 parts of desert sand to clean dust, impurities and the like in the desert sand; after cleaning, dry and sieve at 50℃, arrange the sieve nets from top to bottom in 50 mesh, 80 mesh, 100 mesh, 120 mesh and 180 mesh in turn, and classify the sieved sand into 80-120 mesh and 120-180 mesh; obtain pretreated desert sand with particle size of 80-120 mesh and 120-180 mesh.

[0056] Preparation Example 2

[0057] A pretreated desert sand, a preparation method of the pretreated desert sand comprises:

[0058] Mix 8 parts of alkyl phenol polyoxyethylene ether, 5 parts of oxalic acid solution (mass fraction 15%) and 90 parts of water to obtain a mixed solution, use the mixed solution to clean 50 parts of desert sand to clean dust, impurities and the like in the desert sand; after cleaning, dry and sieve at 50℃, arrange the sieve nets from top to bottom in 50 mesh, 80 mesh, 100 mesh, 120 mesh and 180 mesh in turn, and classify the sieved sand into 80-120 mesh and 120-180 mesh; obtain pretreated desert sand with particle size of 80-120 mesh and 120-180 mesh.

[0059] Preparation Example 3

[0060] A pretreated desert sand, a preparation method of the pretreated desert sand comprises:

[0061] Mix 10 parts of alkyl phenol polyoxyethylene ether, 8 parts of oxalic acid solution (mass fraction 15%) and 90 parts of water to obtain a mixed solution, use the mixed solution to clean 50 parts of desert sand to clean dust, impurities and the like in the desert sand; after cleaning, dry and sieve at 50℃, arrange the sieve nets from top to bottom in 50 mesh, 80 mesh, 100 mesh, 120 mesh and 180 mesh in turn, and classify the sieved sand into 80-120 mesh and 120-180 mesh; obtain pretreated desert sand with particle size of 80-120 mesh and 120-180 mesh.

[0062] Preparation Example 4

[0063] A pretreated desert sand, which is different from the preparation example 1 only in that the amount of alkyl phenol polyoxyethylene ether is 14 parts, the amount of oxalic acid solution is 1 part, and other steps are the same as those of the preparation example 1.

[0064] Preparation Example 5

[0065] A pre-processed desert sand, which is only different from the preparation example 1 in that the alkyl phenol polyoxyethylene ether is 4 parts, the oxalic acid solution is 11 parts, and other steps are the same as the preparation example 1.

[0066] Preparation example 6

[0067] A pre-processed desert sand, which is only different from the preparation example 1 in that the alkyl phenol polyoxyethylene ether is not added in the pre-processed agent, the oxalic acid solution is 15 parts, and other steps are the same as the preparation example 1.

[0068] Comparative preparation example 1

[0069] A pre-processed desert sand, which is only different from the preparation example 1 in that the alkyl phenol polyoxyethylene ether and the oxalic acid are not added in the pre-processed agent, and other steps are the same as the preparation example 1.

[0070] Example 1

[0071] The example provides a colored desert sand, which is a product after calcination of component A and component B; the colored desert sand comprises 90 parts of component A (a pre-processed desert sand provided in the preparation example 1, and the particle size is 80-120 meshes) and 5 parts of component B; the component B comprises, in parts by weight, 35 parts of water, 40 parts of lithium silicate, 0.25 parts of a wetting agent, 0.2 parts of a reinforcing agent, 0.2 parts of an anti-cracking agent, 0.15 parts of a color powder, 0.25 parts of a filler, 0.6 parts of a film-forming aid and 25 parts of an epoxy-modified silicone emulsion.

[0072] The example provides a preparation method of a colored desert sand, and specifically comprises the following steps:

[0073] (1) after dispersing lithium silicate, water, a wetting agent, a reinforcing agent and an anti-cracking agent at a rotating speed of 600 rpm for 5 min, the color powder and the filler are added and dispersed at 1500 rpm for 30 min, then the epoxy-modified silicone emulsion and the film-forming aid are added and dispersed at 500 rpm for 5 min, to obtain component B;

[0074] (2) after mixing component A and component B uniformly, baking at 80 ℃ for 10 min, calcining at 480 for 25 min, and sieving, the colored desert sand is obtained.

[0075] Example 2

[0076] The present embodiment provides a kind of colored desert sand, the colored desert sand is the product after component A and component B are calcined;The colored desert sand includes 85 parts of component A (the pretreated desert sand provided in preparation example 2, particle size is 120-180 mesh) and 5.5 parts of component B;With parts by weight, the component B includes water 30 parts, lithium silicate 36 parts, wetting agent 0.22 parts, reinforcing agent 0.18 parts, anti-cracking agent 0.18 parts, toner 0.1 parts, filler 0.2 parts, film forming aid 0.4 parts and epoxy modified silicone emulsion 20 parts.

[0077] The present embodiment provides a kind of colored desert sand, the colored desert sand is the product after component A and component B are calcined;The colored desert sand includes 85 parts of component A (the pretreated desert sand provided in preparation example 2, particle size is 120-180 mesh) and 5.5 parts of component B;With parts by weight, the component B includes water 30 parts, lithium silicate 36 parts, wetting agent 0.22 parts, reinforcing agent 0.18 parts, anti-cracking agent 0.18 parts, toner 0.1 parts, filler 0.2 parts, film forming aid 0.4 parts and epoxy modified silicone emulsion 20 parts.

[0078] (1) after lithium silicate is dispersed with water, wetting agent, reinforcing agent and anti-cracking agent at 600 rpm for 5 min, toner and filler are added thereto and dispersed at 1500 rpm for 30 min, then epoxy modified silicone emulsion and film forming aid are added and dispersed at 500 rpm for 5 min, to obtain component B;

[0079] (2) component A and component B are mixed uniformly, baked at 80 DEG C for 10 min, then calcined at 485 DEG C for 25 min, sieved, to obtain the colored desert sand.

[0080] Example 3

[0081] The present embodiment provides a kind of colored desert sand, the colored desert sand is the product after component A and component B are calcined;The colored desert sand includes 85 parts of component A (the pretreated desert sand provided in preparation example 2, particle size is 120-180 mesh) and 5.5 parts of component B;With parts by weight, the component B includes water 30 parts, lithium silicate 36 parts, wetting agent 0.22 parts, reinforcing agent 0.18 parts, anti-cracking agent 0.18 parts, toner 0.1 parts, filler 0.2 parts, film forming aid 0.4 parts and epoxy modified silicone emulsion 20 parts.

[0082] The present embodiment provides a kind of colored desert sand, the colored desert sand is the product after component A and component B are calcined;The colored desert sand includes 85 parts of component A (the pretreated desert sand provided in preparation example 2, particle size is 120-180 mesh) and 5.5 parts of component B;With parts by weight, the component B includes water 30 parts, lithium silicate 36 parts, wetting agent 0.22 parts, reinforcing agent 0.18 parts, anti-cracking agent 0.18 parts, toner 0.1 parts, filler 0.2 parts, film forming aid 0.4 parts and epoxy modified silicone emulsion 20 parts.

[0083] (1) after lithium silicate is dispersed with water, wetting agent, reinforcing agent and anti-cracking agent at 600 rpm for 5 min, toner and filler are added thereto and dispersed at 1500 rpm for 30 min, then epoxy modified silicone emulsion and film forming aid are added and dispersed at 500 rpm for 5 min, to obtain component B;

[0084] (2) component A and component B are mixed uniformly, baked at 80 DEG C for 10 min, then calcined at 485 DEG C for 25 min, sieved, to obtain the colored desert sand.

[0085] Example 4-6

[0086] Example 4-6 respectively provides a colored desert sand, which is different from example 1 only in that the component A is respectively the pretreated desert sand provided in preparation example 4-6, and other components, amounts and preparation methods are the same as example 1.

[0087] Example 7

[0088] The present example provides a colored desert sand, which is different from example 1 only in that the amount of component B is 2 parts, and other components, amounts and preparation methods are the same as example 1.

[0089] Example 8

[0090] The present example provides a colored desert sand, which is different from example 1 only in that the amount of component B is 8 parts, and other components, amounts and preparation methods are the same as example 1.

[0091] Example 9

[0092] The present example provides a colored desert sand, which is different from example 1 only in that in the preparation method, the calcination temperature of step (2) is 600℃, and the calcination time is 10 min, and other components, amounts and preparation methods are the same as example 1.

[0093] Example 10

[0094] The present example provides a colored desert sand, which is different from example 1 only in that in the preparation method, the calcination temperature of step (2) is 400℃, and the calcination time is 40 min, and other components, amounts and preparation methods are the same as example 1.

[0095] Comparative example 1

[0096] A colored desert sand, which is different from example 1 only in that in the preparation method, step (2) is not calcined, and other components, amounts and preparation methods are the same as example 1.

[0097] Comparative example 2

[0098] A colored desert sand, which comprises component A and component B; the component A is 90 parts of the pretreated desert sand obtained in preparation example 1 (the particle size is the same as example 1); the component B is 0.15 parts of color powder, and the preparation method comprises: uniformly mixing component A and component B, baking at 80℃ for 10 min, calcining at 480 for 25 min, and sieving to obtain the colored desert sand.

[0099] Comparative example 3

[0100] A kind of color desert sand, only difference with the embodiment 1 is that the component A is the pretreated desert sand provided by comparative preparation example 1, other components, usage and preparation method are same with embodiment 1.

[0101] The desert sand obtained from examples 1-10 and comparative examples 1-3 is tested for the following properties,

[0102] (1) Water content: the sample in natural moisture state is divided into two approximately equal parts by quartering, and one part is weighed to the nearest 0.1 g. The sample is poured into a beaker of known mass and placed in a drying oven at (105 ± 5) °C until constant weight.

[0103] After cooling to room temperature, the mass is weighed again to the nearest 0.1 g. Calculation: Z = ((G2-G1)

[0104] / G1)*100. In the formula, Z-water content (%); G2-sample mass before drying (g); G1-sample mass after drying (g). The water content is the arithmetic mean of two test results, accurate to 0.1%; if the difference between the two test results is greater than 0.2%, the test should be repeated.

[0105] (2) Water resistance: at room temperature, the desert sand is placed in water for 168 h, and the water is observed. If the water is not obviously turbid and does not change color, it is marked as "qualified"; if the water is obviously turbid and / or changes color, it is marked as "poor";

[0106] (3) Boiling water resistance: the desert sand is placed in boiling water for 20 min, and the water is observed. If the water is not obviously turbid and does not change color, it is marked as "qualified"; if the water is obviously turbid and / or changes color, it is marked as "poor";

[0107] (4) Alkali resistance: the desert sand is placed in saturated calcium hydroxide supernatant for 24 h, and the alkali solution is observed. If the alkali solution is not turbid and does not change color, it is marked as "qualified"; if the alkali solution is turbid and / or changes color, it is marked as "poor";

[0108] (5) Mechanical stability: test and determine according to the method in Appendix B of JC / T 2328-2015.

[0109] The test results are shown in Table 1:

[0110] Table 1

[0111]

[0112] As shown in Table 1, the color desert sand provided by the application has low water content, good water resistance, boiling water resistance, alkali resistance and mechanical stability by adopting the pretreated desert sand, then mixing and calcining the desert sand with component B.

[0113] Application Example 1

[0114] A kind of real stone paint, by weight, the real stone paint includes water 14 parts, bactericide 0.1 part, cellulose ether 0.12 part, bentonite 0.08 part, multifunctional amine auxiliary 0.08 part, silicon propylene emulsion 15 parts, film forming aid 0.2 part, defoaming agent 0.05 part, thickening agent 0.1 part, color desert sand 40 parts (example 1) and natural color sand 50 parts.

[0115] The application example provides a preparation method of real stone paint, and specifically comprises the following steps:

[0116] After dispersing water, bactericide, cellulose ether and bentonite at 800 rpm for 8 min, multifunctional amine auxiliary, silicon propylene emulsion, film forming aid and defoaming agent are added and dispersed at 600 rpm for 5 min, thickening agent is added and dispersed at 850 rpm for 10 min, color desert sand and natural color sand are added, and propeller stirring is carried out at 1000 rpm to obtain the real stone paint.

[0117] Application Example 2

[0118] A kind of real stone paint, by weight, the real stone paint includes water 15 parts, bactericide 0.15 part, cellulose ether 0.15 part, bentonite 0.09 part, multifunctional amine auxiliary 0.1 part, silicon propylene emulsion 17 parts, film forming aid 0.25 part, defoaming agent 0.06 part, thickening agent 0.1 part, color desert sand 45 parts (example 2) and natural color sand 45 parts.

[0119] The application example provides a preparation method of real stone paint, and the specific steps are the same as those of application example 1.

[0120] Application Example 3

[0121] A kind of real stone paint, by weight, the real stone paint includes water 13.5 parts, bactericide 0.09 part, cellulose ether 0.12 part, bentonite 0.06 part, multifunctional amine auxiliary 0.09 part, silicon propylene emulsion 14 parts, film forming aid 0.16 part, defoaming agent 0.03 part, thickening agent 0.07 part, color desert sand 35 parts (example 3) and natural color sand 40 parts.

[0122] The application example provides a preparation method of real stone paint, and the specific steps are the same as those of application example 1.

[0123] Application Examples 4-10, Comparative Application Examples 1-3

[0124] A real stone paint, which is only different from the application example 1 in that the colored desert sand is the desert sand provided in the application examples 4-10 and comparative application examples 1-3, and other components, amounts and preparation methods are the same as those in the application example 1.

[0125] Comparative Application Example 4

[0126] A real stone paint, which is only different from the application example 1 in that the colored desert sand is not contained in the real stone paint, and the amount of the natural color sand is 90 parts, and other components, amounts and preparation methods are the same as those in the application example 1.

[0127] Comparative Application Example 5

[0128] A real stone paint, which is only different from the application example 1 in that the colored desert sand is replaced by an artificial color sand with the same weight, and other components, amounts and preparation methods are the same as those in the application example 1.

[0129] Comparative Application Example 6

[0130] A real stone paint, which is only different from the application example 1 in that 50 parts of the natural color sand is replaced by 30 parts of the natural color sand and 20 parts of the artificial color sand, and other components, amounts and preparation methods are the same as those in the application example 1.

[0131] The real stone paints provided in the application examples 1-10 and comparative application examples 1-6 are subjected to performance tests, and the test standards are carried out according to the method of JG / T24-2018, and the test parameters and results are shown in Tables 2 and 3.

[0132] Table 2

[0133]

[0134]

[0135] Table 3

[0136]

[0137]

[0138] As shown in Tables 2 and 3, the colored desert sand provided in the application is obtained by pretreating the desert sand and then mixing and calcining the desert sand with component B, and the colored desert sand is used for preparing the real stone paint, which can not only solve the problems of paint film alkali bleeding and poor durability caused by high mud content, strong alkalinity and poor strength of the desert sand itself, but also has good stone-imitating effect and stable paint performance, and can replace the natural color sand and the artificial color sand, thereby realizing effective utilization of the desert sand.

[0139] The above-described specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application, and it should be understood that the above-described specific embodiments are merely examples of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A type of colored desert sand, characterized in that, The colored desert sand comprises the product obtained by calcining component A and component B. By weight, the colored desert sand comprises 80-100 parts of component A and 4-6 parts of component B; Component A includes pretreated desert sand; By weight, component B comprises 20-30 parts of epoxy-modified silicone emulsion and 35-45 parts of lithium silicate; The pretreatment agent for the pretreated desert sand includes nonionic surfactants and acids; The nonionic surfactant includes at least one of long-chain fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene alkylamine, or polyoxyethylene alkylamide. The acid includes oxalic acid and / or acetic acid; In the pretreated desert sand, the mass ratio of untreated desert sand to nonionic surfactant and acid is 50:(8~10):(5~8); The method for preparing the colored desert sand includes the following steps: Component A and component B are mixed and calcined to obtain the colored desert sand; The calcination temperature is 450~550℃, and the calcination time is 20~30 min.

2. The colored desert sand according to claim 1, characterized in that, The nonionic surfactant is alkylphenol polyoxyethylene ether.

3. The colored desert sand according to claim 1, characterized in that, The mass fraction of the acid is 10-20%.

4. The colored desert sand according to claim 1, characterized in that, The pretreated desert sand includes pretreated desert sand with a particle size of 80-120 mesh and / or pretreated desert sand with a particle size of 120-180 mesh.

5. The colored desert sand according to claim 1, characterized in that, Component B further includes at least one of the following: wetting agent, reinforcing agent, crack-resistant agent, film-forming aid, filler, and colorant.

6. The colored desert sand according to claim 5, characterized in that, Component B comprises 0.2 to 0.3 parts by weight of wetting agent.

7. The colored desert sand according to claim 5, characterized in that, Component B comprises 0.15 to 0.3 parts by weight of reinforcing agent.

8. The colored desert sand according to claim 5, characterized in that, By weight, component B includes 0.15 to 0.3 parts of crack-resistant agent.

9. The colored desert sand according to claim 5, characterized in that, By weight, component B comprises 0.05 to 0.3 parts of color powder.

10. The colored desert sand according to claim 5, characterized in that, Component B comprises 0.2 to 0.3 parts by weight of filler.

11. A method for preparing colored desert sand according to any one of claims 1 to 10, characterized in that, The preparation method includes the following steps: Component A and component B are mixed and calcined to obtain the colored desert sand; The calcination temperature is 450~550℃, and the calcination time is 20~30 min.

12. The preparation method according to claim 11, characterized in that, The calcination temperature is 470~490℃.

13. The preparation method according to claim 11, characterized in that, The step prior to calcination also includes drying the mixture of component A and component B.

14. The preparation method according to claim 13, characterized in that, The drying temperature is 70~90℃, and the time is 5~15 min.

15. A type of stone-like paint, characterized in that, By weight, the real stone paint comprises 14-17 parts emulsion, 35-50 parts colored desert sand and 35-50 parts natural colored sand; The colored desert sand includes the colored desert sand according to any one of claims 1 to 10.

16. The stone-like paint according to claim 15, characterized in that, The emulsion includes silicone-acrylic emulsion.

17. The stone-like paint according to claim 15, characterized in that, The real stone paint also includes at least one of the following: bactericide, cellulose ether, bentonite, multifunctional amine additive, film-forming aid, defoamer, or thickener; The thickeners include polyurethane thickeners and alkali-swellable thickeners.

18. The stone-like paint according to claim 17, characterized in that, By weight, the stone paint further includes 0.09-0.15 parts bactericide, 0.12-0.15 parts cellulose ether, 0.06-0.09 parts bentonite, 0.08-0.1 parts multifunctional amine additive, 0.16-0.25 parts film-forming aid, 0.03-0.06 parts defoamer, and 0.07-0.1 parts thickener.

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