Waterproof coating prepared from red mud and preparation method thereof

Abstract

The application provides a waterproof coating prepared from red mud and a preparation method thereof, wherein the waterproof coating includes, by mass fraction, 300-350 parts of pure propylene emulsion, 150-200 parts of butyronitrile latex, 40-60 parts of halloysite, 40-60 parts of titanium white powder, 100-150 parts of ground red mud, 100-150 parts of heavy calcium powder, 2-3 parts of cellulose ether, 4-6 parts of dispersing agent, 1-3 parts of wetting agent, 3-5 parts of defoaming agent, 2-4 parts of preservative, 6-8 parts of iron red powder, 0.5-1.5 parts of organic color paste and the rest water; the waterproof coating can be prepared from the waste red mud, is more environmentally friendly, has low production cost, and has good waterproofness, strength, adhesion, crack resistance and weather resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building waterproofing, in particular to a waterproof coating prepared from red mud and a preparation method thereof. BACKGROUND

[0002] Red mud is a waste product of the alumina industry, and is called red mud due to its high iron oxide content and appearance similar to red soil. However, the amount of red mud produced by the aluminum industry is large, and has a great impact on the environment. The existing solutions are difficult to directly consume, and therefore, it is of great practical significance to explore a large-scale consumption of red mud, green environmental protection, and efficient technical route. With the acceleration of the modernization process of China's cities, special coatings used in roof and pool parts are being widely concerned due to their irreplaceable advantages. Therefore, the design of a waterproof coating using red mud, a waste product of the aluminum industry, is a solution that not only meets the needs of market development, but also solves the problem of solid waste recycling. SUMMARY

[0003] The present application relates to the technical field of building waterproofing, in particular to a waterproof coating prepared from red mud and a preparation method thereof.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] The present application provides a waterproof coating prepared from red mud, wherein each 1000 parts by mass of the waterproof coating comprises: 300-350 parts by mass of pure acrylic emulsion, 150-200 parts by mass of nitrile rubber latex, 40-60 parts by mass of halloysite, 40-60 parts by mass of titanium dioxide, 100-150 parts by mass of finely ground red mud, 100-150 parts by mass of heavy calcium powder, 2-3 parts by mass of cellulose ether, 4-6 parts by mass of dispersant, 1-3 parts by mass of wetting agent, 3-5 parts by mass of defoamer, 2-4 parts by mass of preservative, 6-8 parts by mass of iron red powder, 0.5-1.5 parts by mass of organic color paste, and the balance of water.

[0006] As a preferred solution of the waterproof coating prepared from red mud, the particle size of the halloysite is 100-300 nm.

[0007] As a preferred solution of the waterproof coating prepared from red mud, the fineness of the finely ground red mud is 325 mesh.

[0008] As a preferred solution of the waterproof coating prepared from red mud, the fineness of the heavy calcium powder is 1200 mesh.

[0009] As a preferred solution of the waterproof coating prepared from red mud, the cellulose ether is hydroxyethyl cellulose ether 250HBR.

[0010] As a preferred scheme of the waterproof coating prepared by using the red mud, the dispersant is dispersant 5040, the wetting agent is wetting agent LCN407, the defoaming agent is defoaming agent 6800, and the preservative is kathon preservative.

[0011] As a preferred scheme of the waterproof coating prepared by using the red mud, the iron red powder is 400 mesh iron oxide red.

[0012] The application further provides a preparation method of the waterproof coating prepared by using the red mud.

[0013] The attapulgite, the ground red mud, the heavy calcium powder and the cellulose ether are pre-mixed by using an ultrasonic mixing device for 100 minutes to prepare a master batch.

[0014] After the master batch is poured out, the styrene-acrylic emulsion, the nitrile rubber latex, the wetting agent, the defoaming agent and the dispersant are stirred and mixed for 5 minutes, the master batch, the titanium white powder, the iron red powder and the organic color paste are slowly added while stirring, and finally the water and the preservative are added and fully stirred for 20 minutes to prepare the waterproof coating.

[0015] The application has the following beneficial effects:

[0016] (1) The use of the superfine attapulgite improves the weather resistance, and the combination of the components such as the pure acrylic emulsion, the ground red mud, the iron red powder and the organic color paste achieves excellent weather resistance and color fixing effect;

[0017] (2) The incorporation of the nitrile rubber latex improves the crack resistance of the material itself;

[0018] (3) The incorporation of the attapulgite improves the flame retardant effect of the material, and the material has certain flame retardant effect, and is particularly suitable for roof, pool and exterior wall waterproof coating;

[0019] (4) The use of the pure acrylic emulsion and the nitrile rubber latex improves the adhesion of the coating, and the use of the ultrasonic pre-mixing method uniformly mixes the materials with different particle size gradients, improves the compactness, and also improves the material strength;

[0020] (5) The use of the ultrasonic pre-mixing method improves the uniformity of the mixing and the mixing and stirring time, reduces the production time, and improves the production efficiency.

[0021] In summary, the application can prepare the waterproof coating by using the waste red mud, is more environmentally friendly, has low production cost, and the prepared waterproof coating has good waterproofness, strength, adhesion, crack resistance and weather resistance. DETAILED DESCRIPTION

[0022] The embodiments of the present disclosure are described in detail below.

[0023] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer are followed. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially. Unless otherwise specified, the reagents used in the embodiments can be purchased from the market. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0024] Example 1

[0025] Weigh out 1 ton of waterproof coating raw materials according to the following components by mass:

[0026] 325kg of pure acrylic emulsion

[0027] 175kg of nitrile latex

[0028] Halloysite (particle size 100nm~300nm) 50kg

[0029] 50kg of titanium dioxide

[0030] Finely ground red mud (325 mesh) 125kg

[0031] Heavy calcium carbonate powder (1200 mesh) 125kg

[0032] HEC cellulose ether (250HBR) 2.5kg

[0033] Dispersant 5040 5kg

[0034] Wetting agent LCN407 2kg

[0035] Defoamer 6800 4kg

[0036] Kathon preservative 3kg

[0037] Iron oxide red powder (400 mesh) 7kg

[0038] Organic Pigment Red R2-SK 1kg

[0039] Water balance

[0040] The waterproof coating is prepared by the following steps:

[0041] The halloysite, ground red mud, heavy calcium powder and cellulose ether are pre-mixed by ultrasound for 100 min using an ultrasonic mixing device to obtain a master batch;

[0042] After the master batch is poured out, the styrene-acrylic emulsion, nitrile rubber latex, wetting agent, defoamer and dispersant are stirred and mixed for 5 min, then the master batch, titanium dioxide, iron red powder and organic color paste are slowly added while stirring, and finally water and preservative are added, and fully stirred for 20 min to obtain the waterproof coating.

[0043] Example 2

[0044] 1t of waterproof coating raw materials is weighed according to the following components, including:

[0045] Pure propylene emulsion 300kg

[0046] Nitrile rubber latex 150kg

[0047] Halloysite (particle size 100nm-300nm) 40kg

[0048] Titanium dioxide 40kg

[0049] Ground red mud (325 mesh) 150kg

[0050] Heavy calcium powder (1200 mesh) 150kg

[0051] HEC cellulose ether (250HBR) 3kg

[0052] Dispersant 5040 6kg

[0053] Wetting agent LCN407 3kg

[0054] Defoamer 6800 5kg

[0055] Kathon preservative 4kg

[0056] Iron red powder (400 mesh, red iron oxide) 8kg

[0057] Organic color paste red R2-SK 1.5kg

[0058] Water balance

[0059] The waterproof coating is prepared by the following steps:

[0060] The halloysite, ground red mud, heavy calcium powder and cellulose ether are pre-mixed by ultrasound for 100 min using an ultrasonic mixing device to obtain a master batch;

[0061] After the masterbatch is poured out, the styrene-acrylic emulsion, the nitrile latex, the wetting agent, the defoaming agent, and the dispersant are added and stirred for 5 minutes, the masterbatch, the titanium white powder, the iron red pigment, and the organic color paste are slowly added while stirring, water and the preservative are finally added, and the mixture is fully stirred for 20 minutes to prepare the waterproof coating.

[0062] Example 3

[0063] 1 t of waterproof coating raw materials is weighed according to the following component mass, including:

[0064] styrene-acrylic emulsion 350 kg

[0065] nitrile latex 200 kg

[0066] halloysite (particle size 100 nm-300 nm) 60 kg

[0067] titanium white powder 60 kg

[0068] ground red mud (325 mesh) 100 kg

[0069] heavy calcium powder (1200 mesh) 100 kg

[0070] HE cellulose ether (250HBR) 2 kg

[0071] dispersant 5040 4 kg

[0072] wetting agent LCN407 1 kg

[0073] defoaming agent 6800 3 kg

[0074] kathon preservative 2 kg

[0075] iron red pigment (400 mesh, red iron oxide) 6 kg

[0076] organic color paste red R2-SK 0.5 kg

[0077] water balance

[0078] The waterproof coating is prepared according to the following steps:

[0079] The halloysite, the ground red mud, the heavy calcium powder, and the cellulose ether are pre-mixed by ultrasonic for 100 minutes using an ultrasonic mixing device to prepare a masterbatch;

[0080] After the masterbatch is poured out, the styrene-acrylic emulsion, the nitrile latex, the wetting agent, the defoaming agent, and the dispersant are added and stirred for 5 minutes, the masterbatch, the titanium white powder, the iron red pigment, and the organic color paste are slowly added while stirring, water and the preservative are finally added, and the mixture is fully stirred for 20 minutes to prepare the waterproof coating.

[0081] Performance test

[0082] The tensile strength, breaking elongation, bonding strength, impermeability, and anti-permeability are detected by using the method of T E type in JC / T 864-2008 "Polymer emulsion building waterproof coating".

[0083] The test results are shown in Table 1 below

[0084] Table 1 Performance index and comparison

[0085]

[0086] From the above results, the waterproof coating prepared by the application has very ideal effects of waterproofing, strength, adhesion, crack resistance, and weather resistance.

[0087] The above is only for describing the embodiments of the application, and is not used for limiting the application, and any modification, equivalent replacement, improvement, etc. made by the skilled in the art within the spirit and principle of the application without creative labor should be included in the protection scope of the application.

Claims

1. A waterproof coating prepared using red mud, characterized in that, By weight, every 1000 parts of the waterproof coating comprises: 300-350 parts of pure acrylic emulsion, 150-200 parts of nitrile latex, 40-60 parts of halloysite, 40-60 parts of titanium dioxide, 100-150 parts of finely ground red mud, 100-150 parts of heavy calcium carbonate powder, 2-3 parts of cellulose ether, 4-6 parts of dispersant, 1-3 parts of wetting agent, 3-5 parts of defoamer, 2-4 parts of preservative, 6-8 parts of iron oxide red powder, 0.5-1.5 parts of organic pigment, and the balance being water; The halloysite has a particle size of 100nm to 300nm; the fineness of the ground red mud is 325 mesh; and the fineness of the heavy calcium carbonate powder is 1200 mesh. The method for preparing the waterproof coating includes the following steps: Halloysite, finely ground red mud, heavy calcium carbonate powder, and cellulose ether were ultrasonically premixed for 100 minutes using an ultrasonic mixing device to prepare a masterbatch. After pouring out the masterbatch, styrene-acrylic emulsion, nitrile latex, wetting agent, defoamer, and dispersant were added and stirred for 5 minutes. Then, while stirring, the masterbatch, titanium dioxide, iron oxide red powder, and organic pigment were slowly added. Finally, water and preservative were added and stirred thoroughly for 20 minutes to prepare a waterproof coating.

2. The waterproof coating prepared using red mud according to claim 1, characterized in that, The cellulose ether is hydroxyethyl cellulose ether 250HBR.

3. The waterproof coating prepared using red mud according to claim 1, characterized in that, The dispersant is dispersant 5040, the wetting agent is wetting agent LCN407, the defoamer is defoamer 6800, and the preservative is Kathon preservative.

4. The waterproof coating prepared using red mud according to claim 1, characterized in that, The iron red powder is 400-mesh iron oxide red, and the organic pigment is Red R2-SK.

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