Ceramic tile binder

Abstract

The invention relates to the technical field of binders, and particularly provides a ceramic tile binder, which is prepared from the following raw materials: 350 to 500 parts of cement, 450 to 500 parts of sand, 20 to 40 parts of polymer rubber powder, 3 to 8 parts of slow release type early strength agent, 2 to 6 parts of direct type early strength agent, 0.2 to 0.5 part of anti-crack fiber, 0.3 to 1 part of water repellent, 1 to 3 parts of water reducing agent, 0.5 to 2 parts of anti-freezing agent and 0.3 to 1 part of rheology modifier. By optimizing the formula of the binder and adopting the combination of various polymer rubber powder, the adhesive force and the bonding effect of the binder, especially the bonding performance of the binder on a low-water-absorption base material, are remarkably improved, and the problem that a traditional binder is not firm in bonding on the surface of the low-water-absorption base material is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesives, and particularly to a tile adhesive. Background Art

[0002] As a material widely used in the construction industry, tile adhesives are mainly used to fix tiles on walls or floors to ensure their stability and durability. With the continuous development of construction technology, the requirements for tile adhesives have gradually increased. Especially in modern buildings, the types and usage environments of tiles are more diverse, which poses higher requirements for the performance of tile adhesives.

[0003] Most traditional tile adhesives are based on basic materials such as cement, sand, and polymers, and are cured through hydration reactions to form a bonding layer with relatively high strength. However, in the face of some special application scenarios, traditional adhesives also have some technical bottlenecks. For example, many substrates have extremely low water absorption, with a large difference in water absorption rate from tiles. When traditional tile adhesives are used on these low-water-absorption substrates, the bonding effect is poor, resulting in insufficient bonding force between the tiles and the substrates, and quality problems such as tile detachment are likely to occur. Summary of the Invention

[0004] In view of this, the present invention proposes a formulation of an adhesive that can be applicable to low-water-absorption substrates or low-water-absorption tiles.

[0005] The technical solution of the present invention is implemented as follows: The present invention provides a tile adhesive, and the raw materials of the tile adhesive include: 350 - 500 parts of cement, 450 - 500 parts of sand, 20 - 40 parts of polymer powder, 3 - 8 parts of slow-release early-strength agent, 2 - 6 parts of direct early-strength agent, 0.2 - 0.5 parts of anti-cracking fiber, 0.3 - 1 part of water-repellent agent, 1 - 3 parts of water-reducing agent, 0.5 - 2 parts of antifreeze agent, and 0.3 - 1 part of rheological modifier.

[0006] In some embodiments, the polymer powder is composed of ultra-fine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder, and water-soluble polyurethane powder.

[0007] In some embodiments, the mass ratio of ultra-fine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder, and water-soluble polyurethane powder is (6 - 8) : (3 - 5) : (2 - 4) : (1 - 2) : (3 - 5).

[0008] In some embodiments, the slow-release early-strength agent is sodium fluorosilicate.

[0009] In some embodiments, the direct early-strength agent is at least one of sodium tricalcium silicate and sodium tricalcium phosphate.

[0010] In some embodiments, the crack-resistant fiber is a polypropylene fiber.

[0011] In some embodiments, the water repellent is a silane water repellent.

[0012] In some embodiments, the water reducing agent is an amino sulfonate.

[0013] In some embodiments, the antifreeze is propylene glycol.

[0014] In some embodiments, the rheology modifier is carboxymethyl cellulose.

[0015] The present invention has the following beneficial effects compared with the prior art:

[0016] By optimizing the formulation of the binder and adopting a combination of various polymer powder adhesives, the present invention significantly improves the adhesion and bonding effect of the binder, especially the bonding performance on low-absorbency substrates, and avoids the problem of poor bonding of traditional binders on the surface of low-water-absorbency substrates. Secondly, the addition of the slow-release type and direct type early strength agents can improve the initial strength of the binder in a short time, reduce the waiting time, shorten the construction period, and improve the work efficiency. Specific Embodiments

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

[0018] Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the embodiments of the present invention belong. If the definitions stated in this part are contrary to or inconsistent with the definitions stated in the patents, patent applications, published patent applications and other publications incorporated herein by reference, the definitions listed in this part shall prevail over the definitions incorporated herein by reference.

[0019] Unless otherwise specified, the methods used in the following examples are all conventional methods. The materials, reagents and instruments used, unless otherwise specified, are all conventional materials, reagents and instruments in the art, and those skilled in the art can obtain them through commercial channels.

[0020] When an equivalent, concentration or other value or parameter is expressed as a range, a preferred range or a range defined by a series of upper preferred values and lower preferred values, this should be understood to specifically disclose all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, whether or not such ranges are separately disclosed. For example, when the range "1 to 5" is disclosed, the described range should be interpreted to include ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within the range. In the specification and claims of the present application, range limitations can be combined and / or interchanged, and if not otherwise stated, these ranges include all sub-ranges contained therein.

[0021] In the prior art, the curing process of cement relies on the hydration reaction between cement and water to generate chemical products such as calcium silicate hydrate, forming a bonding layer with relatively high strength. This reaction requires moisture to promote the dissolution and recrystallization of cement particles. However, in some special application scenarios, especially when facing low-absorbency substrates, the cement hydration reaction is limited. The low-absorbency substrate itself lacks sufficient moisture to promote the cement hydration reaction, resulting in a slowdown in the hydration rate of cement, and thus the bonding effect cannot be fully exerted. In this case, the bonding force between the cement and the substrate is insufficient, easily leading to problems such as the detachment or delamination of tiles from the substrate.

[0022] The polymer powder used in the present invention is composed of ultra-fine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder.

[0023] Polyurethane powder has strong adhesiveness, elasticity and water resistance, and at the same time has good weather resistance and anti-aging ability. The particle size of the ultra-fine polyurethane powder is very small, which can effectively increase the surface area of the powder, thereby improving the adhesion and strength of the binder.

[0024] The self-crosslinking acrylate powder has a strong self-crosslinking ability and can self-crosslink into a network structure during the curing process, thereby improving the strength and durability of the binder. It also has good water resistance and weather resistance and can maintain strong adhesion in a changing environment.

[0025] The polyether ether ketone powder has extremely high thermal stability, chemical stability and mechanical strength, and the aromatic rings and ketone groups in its molecular structure provide good rigidity and adhesiveness.

[0026] Polymethyl methacrylate (PMMA) powder has good transparency, chemical stability, and ultraviolet resistance, and can enhance the adhesion and strength of adhesives. PMMA has good flexibility and toughness, and can form a stable solid structure after curing.

[0027] Water-soluble polyurethane powder has high hydrophilicity and excellent chemical stability, and can form a strong chemical network structure with cement-based adhesives through hydrogen bonds during the curing process. This water-soluble polyurethane helps to improve the wettability and fluidity of the adhesive, and enhance its adhesion to low-water-absorbing substrates.

[0028] Polyurethane powder and self-crosslinking acrylate powder can provide excellent adhesion and elasticity. Polyetheretherketone powder improves the high-temperature resistance and chemical corrosion resistance. PMMA powder enhances the toughness and stability of the overall bonding layer. Water-soluble polyurethane powder improves the hydrophilicity and fluidity of the adhesive, and optimizes the compatibility between the adhesive and low-water-absorbing substrates.

[0029] A compound system of specific proportions of ultrafine polyurethane powder, self-crosslinking acrylate powder, polyetheretherketone powder, PMMA powder, and water-soluble polyurethane powder solves the problem of insufficient adhesion of traditional tile adhesives on low-water-absorbing substrates through their different characteristics and synergistic effects. They not only improve the adhesion and stability of the adhesive, but also optimize the water resistance, crack resistance, and toughness of the adhesive, enabling the adhesive to better adapt to diverse substrates in modern buildings and ensuring the long-term stability of tiles.

[0030] In the following examples and comparative examples, the cement used is ordinary Portland cement with a grade of 42.5. The sand used is medium-coarse sand with a mesh number of 30 - 50.

[0031] Example 1

[0032] This example provides a technical solution for a tile adhesive.

[0033] The raw materials of the adhesive include:

[0034] 350 parts of cement

[0035] 450 parts of sand

[0036] 20 parts of polymer powder

[0037] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyetheretherketone powder, PMMA powder, and water-soluble polyurethane powder in a mass ratio of 6:3:2:1:3.

[0038] 3 parts of sodium fluorosilicate

[0039] 2 parts of sodium tricalcium silicate

[0040] 0.2 part of polypropylene fiber

[0041] 0.3 part of ethyl trisilane

[0042] 1 part of sodium sulfamate

[0043] 0.5 part of propylene glycol

[0044] 0.3 part of carboxymethyl cellulose

[0045] The preparation method of the binder includes mixing the above raw materials evenly to obtain it.

[0046] Example 2

[0047] This example provides a technical solution for a tile binder.

[0048] The raw materials of the binder include:

[0049] 400 parts of cement

[0050] 460 parts of sand

[0051] 25 parts of polymer powder

[0052] The polymer powder includes ultra-fine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 6:3:2:1:3.

[0053] 4 parts of sodium fluorosilicate

[0054] 3 parts of sodium tricalcium silicate

[0055] 0.3 part of polypropylene fiber

[0056] 0.4 part of ethyl trisilane

[0057] 1.5 parts of sodium sulfamate

[0058] 1 part of propylene glycol

[0059] 0.5 part of carboxymethyl cellulose

[0060] The preparation method of the binder includes mixing the above raw materials evenly to obtain it.

[0061] Example 3

[0062] This example provides a technical solution for a tile binder.

[0063] The raw materials of the binder include:

[0064] 450 parts of cement

[0065] 470 parts of sand

[0066] 30 parts of polymer powder

[0067] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 6:3:2:1:3.

[0068] 5 parts of sodium fluorosilicate

[0069] 4 parts of sodium tricalcium silicate

[0070] 0.4 part of polypropylene fiber

[0071] 0.6 part of ethyl trisilane

[0072] 2 parts of sodium sulfamate

[0073] 1.5 parts of propylene glycol

[0074] 0.7 part of carboxymethyl cellulose

[0075] The preparation method of the binder includes mixing the above raw materials and stirring evenly.

[0076] Example 4

[0077] This example provides a technical solution for a tile binder.

[0078] The raw materials of the binder include:

[0079] 500 parts of cement

[0080] 500 parts of sand

[0081] 40 parts of polymer powder

[0082] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 6:3:2:1:3.

[0083] 8 parts of sodium fluorosilicate

[0084] 6 parts of sodium tricalcium silicate

[0085] 0.5 part of polypropylene fiber

[0086] 1 part of ethyl trisilane

[0087] 3 parts of sodium sulfamate

[0088] 2 parts of propylene glycol

[0089] 1 part of carboxymethyl cellulose

[0090] The preparation method of the binder includes mixing the above raw materials and stirring evenly.

[0091] Example 5

[0092] This example provides a technical solution for a tile adhesive.

[0093] The raw materials of the adhesive include:

[0094] 450 parts of cement

[0095] 470 parts of sand

[0096] 30 parts of polymer powder

[0097] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 7:4:3:1:4.

[0098] 5 parts of sodium fluorosilicate

[0099] 4 parts of tricalcium silicate

[0100] 0.4 part of polypropylene fiber

[0101] 0.6 part of ethyl trisilane

[0102] 2 parts of sodium sulfamate

[0103] 1.5 parts of propylene glycol

[0104] 0.7 part of carboxymethyl cellulose

[0105] The preparation method of the adhesive includes mixing the above raw materials evenly.

[0106] Example 6

[0107] This example provides a technical solution for a tile adhesive.

[0108] The raw materials of the adhesive include:

[0109] 450 parts of cement

[0110] 470 parts of sand

[0111] 30 parts of polymer powder

[0112] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 8:5:4:2:5.

[0113] 5 parts of sodium fluorosilicate

[0114] 4 parts of tricalcium silicate

[0115] 0.4 part of polypropylene fiber

[0116] 0.6 parts of ethyl trisilane

[0117] 2 parts of sodium aminosulfonate

[0118] 1.5 parts of propylene glycol

[0119] 0.7 parts of carboxymethyl cellulose

[0120] The preparation method of the binder includes mixing the above raw materials evenly.

[0121] Comparative Example 1

[0122] This example provides a technical solution for a tile binder.

[0123] The raw materials of the binder include:

[0124] 450 parts of cement

[0125] 470 parts of sand

[0126] 30 parts of polymer powder

[0127] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder and polymethyl methacrylate powder with a mass ratio of 6:3:2:1.

[0128] 5 parts of sodium fluorosilicate

[0129] 4 parts of tricalcium silicate

[0130] 0.4 parts of polypropylene fiber

[0131] 0.6 parts of ethyl trisilane

[0132] 2 parts of sodium aminosulfonate

[0133] 1.5 parts of propylene glycol

[0134] 0.7 parts of carboxymethyl cellulose

[0135] The preparation method of the binder includes mixing the above raw materials evenly.

[0136] Comparative Example 2

[0137] This example provides a technical solution for a tile binder.

[0138] The raw materials of the binder include:

[0139] 450 parts of cement

[0140] 470 parts of sand

[0141] 30 parts of polymer powder

[0142] The polymer powder comprises ultrafine polyurethane powder, self-crosslinking acrylate powder, polyetheretherketone powder and water-soluble polyurethane powder in a mass ratio of 6:3:2:3.

[0143] 5 parts of sodium fluorosilicate

[0144] 4 parts of tricalcium silicate

[0145] 0.4 part of polypropylene fiber

[0146] 0.6 part of ethyl trisilane

[0147] 2 parts of sodium aminosulfonate

[0148] 1.5 parts of propylene glycol

[0149] 0.7 part of carboxymethyl cellulose

[0150] The preparation method of the binder comprises mixing the above raw materials and stirring evenly to obtain it.

[0151] Comparative Example 3

[0152] This example provides a technical solution of a tile binder.

[0153] The raw materials of the binder include:

[0154] 450 parts of cement

[0155] 470 parts of sand

[0156] 30 parts of polymer powder

[0157] The polymer powder comprises ultrafine polyurethane powder, self-crosslinking acrylate powder, polymethyl methacrylate powder and water-soluble polyurethane powder in a mass ratio of 6:3:1:3.

[0158] 5 parts of sodium fluorosilicate

[0159] 4 parts of tricalcium silicate

[0160] 0.4 part of polypropylene fiber

[0161] 0.6 part of ethyl trisilane

[0162] 2 parts of sodium aminosulfonate

[0163] 1.5 parts of propylene glycol

[0164] 0.7 part of carboxymethyl cellulose

[0165] The preparation method of the binder comprises mixing the above raw materials and stirring evenly to obtain it.

[0166] Comparative Example 4

[0167] This embodiment provides a technical solution for a tile adhesive.

[0168] The raw materials of the adhesive include:

[0169] 450 parts of cement

[0170] 470 parts of sand

[0171] 30 parts of polymer powder

[0172] The polymer powder includes ultrafine polyurethane powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 6:2:1:3.

[0173] 5 parts of sodium fluorosilicate

[0174] 4 parts of tricalcium silicate

[0175] 0.4 part of polypropylene fiber

[0176] 0.6 part of ethyl trisilane

[0177] 2 parts of sodium aminosulfonate

[0178] 1.5 parts of propylene glycol

[0179] 0.7 part of carboxymethyl cellulose

[0180] The preparation method of the adhesive includes mixing the above raw materials and stirring evenly.

[0181] Comparative Example 5

[0182] This embodiment provides a technical solution for a tile adhesive.

[0183] The raw materials of the adhesive include:

[0184] 450 parts of cement

[0185] 470 parts of sand

[0186] 30 parts of polymer powder

[0187] The polymer powder includes self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 3:2:1:3.

[0188] 5 parts of sodium fluorosilicate

[0189] 4 parts of tricalcium silicate

[0190] 0.4 part of polypropylene fiber

[0191] 0.6 part of ethyl trisilane

[0192] 2 parts of sodium aminosulfonate

[0193] 1.5 parts of propylene glycol

[0194] 0.7 part of carboxymethyl cellulose

[0195] The preparation method of the binder includes mixing the above raw materials evenly to obtain it.

[0196] Comparative Example 6

[0197] This embodiment provides a technical solution of a tile binder.

[0198] The raw materials of the binder include:

[0199] 450 parts of cement

[0200] 470 parts of sand

[0201] 30 parts of polymer powder

[0202] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 3:6:2:1:3.

[0203] 5 parts of sodium fluorosilicate

[0204] 4 parts of tricalcium silicate

[0205] 0.4 part of polypropylene fiber

[0206] 0.6 part of ethyl trisilane

[0207] 2 parts of sodium sulfamate

[0208] 1.5 parts of propylene glycol

[0209] 0.7 part of carboxymethyl cellulose

[0210] The preparation method of the binder includes mixing the above raw materials evenly to obtain it.

[0211] Comparative Example 7

[0212] This embodiment provides a technical solution of a tile binder.

[0213] The raw materials of the binder include:

[0214] 450 parts of cement

[0215] 470 parts of sand

[0216] 30 parts of polymer powder

[0217] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 2:3:6:1:3.

[0218] 5 parts of sodium fluorosilicate

[0219] 4 parts of sodium tricalcium silicate

[0220] 0.4 part of polypropylene fiber

[0221] 0.6 part of ethyl trisilane

[0222] 2 parts of sodium aminosulfonate

[0223] 1.5 parts of propylene glycol

[0224] 0.7 part of carboxymethyl cellulose

[0225] The preparation method of the binder includes mixing the above raw materials evenly to obtain it.

[0226] Comparative Example 8

[0227] This example provides a technical solution of a tile binder.

[0228] The raw materials of the binder include:

[0229] 450 parts of cement

[0230] 470 parts of sand

[0231] 30 parts of polymer powder

[0232] The polymer powder includes ultrafine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 6:3:2:1:3.

[0233] 9 parts of sodium tricalcium silicate

[0234] 0.4 part of polypropylene fiber

[0235] 0.6 part of ethyl trisilane

[0236] 2 parts of sodium aminosulfonate

[0237] 1.5 parts of propylene glycol

[0238] 0.7 part of carboxymethyl cellulose

[0239] The preparation method of the binder includes mixing the above raw materials evenly to obtain it.

[0240] Comparative Example 9

[0241] This example provides a technical solution of a tile binder.

[0242] The raw materials of the binder include:

[0243] 450 parts of cement

[0244] 470 parts of sand

[0245] 30 parts of polymer powder

[0246] The polymer powder includes ultra-fine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 6:3:2:1:3.

[0247] 9 parts of tricalcium silicate

[0248] 0.4 part of polypropylene fiber

[0249] 0.6 part of ethyl trisilane

[0250] 2 parts of sodium sulfamate

[0251] 1.5 parts of propylene glycol

[0252] 0.7 part of carboxymethyl cellulose

[0253] The preparation method of the binder includes mixing the above raw materials and stirring evenly.

[0254] Comparative Example 10

[0255] This example provides a technical solution for a tile binder.

[0256] The raw materials of the binder include:

[0257] 450 parts of cement

[0258] 470 parts of sand

[0259] 30 parts of polymer powder

[0260] The polymer powder includes ultra-fine polyurethane powder, self-crosslinking acrylate powder, polyether ether ketone powder, polymethyl methacrylate powder and water-soluble polyurethane powder with a mass ratio of 6:3:2:1:3.

[0261] 5 parts of sodium silicate

[0262] 4 parts of tricalcium silicate

[0263] 0.4 part of polypropylene fiber

[0264] 0.6 part of ethyl trisilane

[0265] 2 parts of sodium sulfamate

[0266] 1.5 parts of propylene glycol

[0267] 0.7 part of carboxymethyl cellulose

[0268] The preparation method of the binder includes mixing the above raw materials and stirring evenly.

[0269] The raw material dosage ratios of each example and comparative example are as follows in the table:

[0270]

[0271] Performance test

[0272] The test samples are the binders prepared from the above examples and comparative examples, the test substrate is a tile with low water absorption, and the base is a standard cement base.

[0273] Bond strength test: The bond strength test is carried out according to the standard of JC / T547-2017, and the bond strengths after 24h, 7d, and 28d are measured respectively.

[0274] Anti-cracking performance test: Under different environmental conditions, a freeze-thaw cycle experiment is carried out to measure the expansion of cracks on the tile surface, and the number of freeze-thaw cycles refers to T / CBCSA 29-2020.

[0275] Workability test: Standard test methods are used to measure the fluidity of the binder, the workability of the binder and the operable time.

[0276] Early strength test: According to the standard of GB / T 1345, the early strength test is carried out to measure the compressive strength of cement within 24h.

[0277] The results after performance test are as follows in the table:

[0278] Grouping Bond strength (MPa) Crack resistance performance (mm) Workability (minutes) Early strength (MPa) Example 1 3.5 0.2 85 2.5 Example 2 4 0.3 88 3 Example 3 5 0.5 92 4 Example 4 4.3 0.4 90 3.5 Example 5 4.2 0.4 89 3.4 Example 6 4.1 0.4 91 3.6 Comparative Example 1 3.8 0.3 87 3 Comparative Example 2 3.7 0.3 86 2.9 Comparative Example 3 3.6 0.3 85 2.8 Comparative Example 4 3.5 0.3 84 2.7 Comparative Example 5 3.4 0.3 83 2.6 Comparative Example 6 3.3 0.3 82 2.5 Comparative Example 7 3.2 0.3 81 2.4 Comparative Example 8 4 0.4 90 3.7 Comparative Example 9 4.1 0.4 91 3.8 Comparative Example 10 3.9 0.3 88 3.3

[0279] From the data of the above examples and comparative examples, it is not difficult to see that the raw material dosage ratio of Example 3 has the optimal performance data. Comparing Example 5 and Example 6 with Example 3, it can be seen that the dosage ratio of polymer powder in Example 3 has the best performance.

[0280] At the same time, comparing the data of Example 3 with those of Comparative Examples 1-7, it can also be seen that only when the formula and ratio of the polymer powder in Example 3 are adopted can the best performance be achieved.

[0281] Comparative Examples 8-10 respectively adopt different early strength agent systems. Comparing with the data results of Example 3, it can be seen that when the slow-release type early strength agent and the direct type early strength agent of the present application are combined, the various performances of the tile binder are significantly improved.

[0282] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tile adhesive, characterized in that: The raw materials of the tile adhesive include: 350-500 parts of cement, 450-500 parts of sand, 20-40 parts of polymer glue powder, 3-8 parts of slow-release early strength agent, 2-6 parts of direct early strength agent, 0.2-0.5 parts of anti-cracking fiber, 0.3-1 parts of water repellent, 1-3 parts of water reducing agent, 0.5-2 parts of antifreeze agent and 0.3-1 parts of rheology modifier.

2. The tile adhesive according to claim 1, characterized in that The polymer rubber powder consists of superfine polyurethane rubber powder, self-crosslinking acrylate rubber powder, polyetheretherketone rubber powder, polymethyl methacrylate rubber powder and water-soluble polyurethane rubber powder.

3. The tile adhesive according to claim 2, characterized in that The mass ratio of ultrafine polyurethane rubber powder, self-crosslinking acrylic rubber powder, polyetheretherketone rubber powder, polymethyl methacrylate rubber powder and water-soluble polyurethane rubber powder is (6-8):(3-5):(2-4):(1-2):(3-5).

4. The tile adhesive according to claim 1, characterized in that The sustained-release early-strength agent is sodium fluorosilicate.

5. The tile adhesive according to claim 1, characterized in that The direct early strength agent is at least one of tricalcium sodium silicate and tricalcium sodium phosphate.

6. The tile adhesive according to claim 1, characterized in that The anti-cracking fiber is polypropylene fiber.

7. The tile adhesive according to claim 1, characterized in that The water repellent is a silane water repellent.

8. The tile adhesive according to claim 1, characterized in that The water reducing agent is aminosulfonate.

9. The tile adhesive according to claim 1, characterized in that The antifreeze agent is propylene glycol.

10. The tile adhesive according to claim 1, characterized in that The rheology modifier is carboxymethyl cellulose.

Images