Two-component tile backing adhesive with a textured finish, its preparation method, and applications

Abstract

This invention discloses a two-component tile adhesive with a textured finish, its preparation method, and its application, relating to the field of tile adhesive technology. It includes a liquid component and a powder component. An anionic acrylic polymer emulsion is used as a thickener in the liquid component. This thickener is an alkali-swellable non-associative thickener, which effectively increases the viscosity of the two-component tile adhesive at low shear rates, imparting good pseudoplasticity, yield value, and gel structure, thus enhancing the textured finish and enabling a more stable interfacial bond between the two-component tile adhesive and the tile adhesive. By adding starch ether and cellulose ether to the powder component, the sag of the two-component tile adhesive is significantly reduced during vertical application. The molecular chains of the starch ether and cellulose ether form a flocculated network by bridging cement particles, directly improving the shear resistance, anti-sagging ability, and textured finish of the two-component tile adhesive.

Description

Technical Field

[0001] This invention relates to the field of ceramic tile adhesive technology, and more specifically, to a two-component ceramic tile adhesive with a textured finish, its preparation method, and its application. Background Technology

[0002] Tile laying is a standard construction technique in building decoration projects, typically applied to building substrates such as walls and floors. To ensure the long-term stability and durability of the finishing system, a waterproof layer must be applied to the building substrate before tile laying.

[0003] Since tiles themselves do not have adhesive properties, special tile adhesives are needed to bond them to the surface of the waterproof layer. The main types of tile adhesives include cement mortar, tile glue, and paste-like emulsion adhesives. In order to form a high-strength adhesive layer between the back of the tile and the tile adhesive and reduce the risk of tile hollowing and falling off, a layer of tile back adhesive is usually applied to the back of the tile. The tile back adhesive achieves chemical bonding and physical penetration between the back of the tile and the tile adhesive.

[0004] Tile adhesives can be classified into single-component and two-component types based on their composition. Single-component tile adhesives typically consist of a high-molecular polymer emulsion and various functional additives; two-component tile adhesives consist of a liquid component and a powder component, which are mixed in a scientifically proportioned ratio to form a high-strength adhesive material. Currently, common two-component tile adhesives on the market have defects such as low viscosity, poor leveling properties, and poor roughening effect. This results in a lower surface roughness after the two-component tile adhesive dries, a smaller contact area with the tile adhesive, and poorer load-bearing capacity for wall tiles, making wall tiles prone to hollowing and detachment.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a two-component ceramic tile backing adhesive with a textured finish, its preparation method, and its application.

[0007] This invention is implemented as follows: In a first aspect, the present invention provides a two-component ceramic tile backing adhesive, comprising a liquid component and a powder component.

[0008] The raw materials for the liquid material include styrene-butadiene emulsion, thickener, defoamer, bactericide and water.

[0009] The raw materials for the powder include cement, quartz sand, cellulose ether, and starch ether.

[0010] The thickener is an alkali-swellable non-associated thickener, which is an anionic acrylic polymer emulsion.

[0011] In an optional embodiment, the mass ratio of styrene-butadiene emulsion, thickener, defoamer, bactericide and water in the liquid is (300~500):(1~4):(1~4):(1~4):(500~700).

[0012] In an optional embodiment, the mass ratio of cement, quartz sand, cellulose ether and starch ether in the powder is (400~600):(400~600):(1~4):(1~4).

[0013] In an optional implementation, the mass ratio of liquid to powder is 1:(2.7~3.3).

[0014] In an optional embodiment, the cement includes either gray silicate cement or white silicate cement.

[0015] In an optional embodiment, the particle size of the quartz sand is 70-120 mesh.

[0016] In optional embodiments, the defoamer includes any one of silicone defoamers and mineral oil defoamers.

[0017] Secondly, the present invention provides a method for preparing a two-component tile backing adhesive as described in any of the foregoing embodiments, comprising mixing the raw materials of the liquid component evenly, mixing the raw materials of the powder component evenly, and then mixing the liquid component and the powder component in a certain proportion to obtain the two-component tile backing adhesive.

[0018] Thirdly, the present invention provides an application of a two-component tile adhesive as described in any of the foregoing embodiments in the field of tile laying.

[0019] The present invention has the following beneficial effects: This invention provides a two-component tile adhesive with a textured finish, its preparation method, and its application. By using an anionic acrylic polymer emulsion as a thickener in the liquid component—an alkali-swellable, non-associated thickener—the viscosity of the two-component tile adhesive at low shear rates is effectively increased, imparting good pseudoplasticity, yield value, and gel structure, thus enhancing the textured finish and enabling a more stable interfacial bond between the two-component tile adhesive and the tile adhesive. The addition of starch ether and cellulose ether to the powder component significantly reduces the sag of the two-component tile adhesive during vertical application. The molecular chains of the starch ether and cellulose ether form a flocculated network by bridging cement particles, directly improving the shear resistance, anti-sagging ability, and textured finish of the two-component tile adhesive. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Embodiment 1 of the present invention; Figure 2 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 1 of the present invention; Figure 3 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 2 of the present invention; Figure 4 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 3 of the present invention; Figure 5 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 4 of the present invention; Figure 6 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 5 of the present invention; Figure 7 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 6 of the present invention; Figure 8 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 7 of the present invention; Figure 9 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 8 of the present invention; Figure 10 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 9 of the present invention; Figure 11 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 10 of the present invention; Figure 12 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 11 of the present invention; Figure 13 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 12 of the present invention; Figure 14 This is a roughening effect diagram of the two-component ceramic tile backing adhesive provided in Comparative Example 13 of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0023] In a first aspect, the present invention provides a two-component ceramic tile backing adhesive, comprising a liquid component and a powder component.

[0024] The raw materials for the liquid material include styrene-butadiene emulsion, thickener, defoamer, bactericide and water.

[0025] The thickener is an alkali-swellable non-associated thickener, which is an anionic acrylic polymer emulsion.

[0026] By using anionic acrylic polymer emulsion as a thickener in the liquid material, which is an alkali-swellable non-associative thickener, the viscosity of the two-component tile adhesive at low shear rates can be effectively increased, giving it good pseudoplasticity, yield value and gel structure, and improving the roughening effect (i.e., the roughening roller can stably maintain the pointed protrusion structure after being lifted away), thereby enabling the two-component tile adhesive to achieve a more stable interfacial bond with the tile adhesive.

[0027] The raw materials for the powder include cement, quartz sand, cellulose ether, and starch ether.

[0028] By adding starch ether and cellulose ether to the powder, the sag of the two-component tile adhesive is greatly reduced when applied to vertical surfaces. The molecular chains of the starch ether and cellulose ether form a flocculation network by bridging cement particles, which directly improves the shear resistance, anti-sagging ability and texture effect of the two-component tile adhesive.

[0029] In an optional embodiment, the mass ratio of styrene-butadiene emulsion, thickener, defoamer, bactericide and water in the liquid is (300~500):(1~4):(1~4):(1~4):(500~700).

[0030] In an optional embodiment, the mass ratio of cement, quartz sand, cellulose ether and starch ether in the powder is (400~600):(400~600):(1~4):(1~4).

[0031] By controlling the proportions of each raw material in the liquid within the above-mentioned range, it is possible to ensure that the alkali-swellable non-associative thickener fully dissociates and undergoes controlled swelling in the system, forming a uniform, dense, and high-yield-stress three-dimensional gel network structure. This structure significantly improves the low-shear viscosity of the liquid, thereby effectively resisting gravity flow, maintaining the texture peak and valley morphology, and reducing roller coating splashes during roller coating / texturing processes, providing a rheological basis for subsequent powder mixing and the macroscopic roughness of the final textured layer.

[0032] By controlling the proportions of each raw material in the powder within the above-mentioned range, a synergistic flocculation effect of cellulose ether and starch ether in cement paste can be achieved. The molecular chains of cellulose ether and starch ether are in Ca... 2+ Under bridging action, it forms a dynamic and reversible "particle-polymer-particle" bridging network with the hydroxyl and silicate phases on the surface of cement particles, rapidly constructing a thixotropic structure. It exhibits a high storage modulus when stationary, and recovers fluidity under construction shear. At the same time, it can also give the two-component tile adhesive excellent roughening properties, that is, after the roughening roller is lifted, it can stably maintain a serrated protrusion structure, and form microgrooves after drying and curing, significantly increasing the effective bonding contact area between the two-component tile adhesive and the tile adhesive.

[0033] In an optional implementation, the mass ratio of liquid to powder is 1:(2.7~3.3). For example, the mass ratio of liquid to powder can be any value or a range between any two points, such as 1:2.7, 1:2.8, 1:2.9, 1:3.0, 1:3.1, 1:3.2 or 1:3.3.

[0034] In an optional embodiment, the cement includes either gray silicate cement or white silicate cement.

[0035] In an optional embodiment, the particle size of the quartz sand is 70-120 mesh.

[0036] In optional embodiments, the defoamer includes any one of silicone defoamers and mineral oil defoamers.

[0037] Secondly, the present invention provides a method for preparing a two-component tile backing adhesive as described in any of the foregoing embodiments, comprising mixing the raw materials of the liquid component evenly, mixing the raw materials of the powder component evenly, and then mixing the liquid component and the powder component in a certain proportion to obtain the two-component tile backing adhesive.

[0038] Thirdly, the present invention provides an application of a two-component tile adhesive as described in any of the foregoing embodiments in the field of tile laying.

[0039] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0040] The raw materials used in the following examples and comparisons are from the following sources: The styrene-butadiene emulsion is M-3618 from Shengxi'ao Company.

[0041] The thickener is ASE-60 from Dow Chemical Company of the United States.

[0042] The defoamer is NOPCO NXZ from S.N.P. Ltd.

[0043] The bactericide is M100 from Guangzhou Dimei Biotechnology Co., Ltd.

[0044] The cement is gray silicate cement, specifically P·O42.5R gray cement.

[0045] The particle size of quartz sand is 70~120 mesh.

[0046] The cellulose ether is M3012 from Shandong Tiansheng Fiber Co., Ltd.

[0047] The starch ether is CMT from AVEBE.

[0048] Example 1 This embodiment provides a two-component tile backing adhesive with a textured effect, comprising a liquid component and a powder component.

[0049] The raw materials for the liquid include: 400 parts by weight of styrene-butadiene emulsion, 2 parts by weight of thickener, 2 parts by weight of defoamer, 3 parts by weight of bactericide, and 593 parts by weight of water.

[0050] The raw materials for the powder include: 500 parts by weight of cement, 496 parts by weight of quartz sand, 2 parts by weight of cellulose ether and 2 parts by weight of starch ether.

[0051] The mass ratio of liquid to powder is 1:3.

[0052] The present invention also provides comparative examples, the raw material selection of each comparative example is the same as that of Example 1, and the mass ratio of liquid material to powder material is also 1:3. The only difference is that the liquid material formula and / or powder material formula are different, as shown in Table 1 and Table 2.

[0053] Table 1 Liquid formulation (unit: parts by weight)

[0054] Table 2 Powder Formulation (Unit: Parts by Weight)

[0055] Comparative Example 13 This comparative example provides a two-component tile adhesive, which is a commercially available two-component tile adhesive from a certain brand.

[0056] Experimental Example 1 The two-component tile adhesives provided in Example 1 and Comparative Examples 1-12 were applied to the back of tiles, and the roughening effect of each two-component tile adhesive was observed to obtain the desired results. Figures 1-14 The results are shown.

[0057] Following the method in "TCBMF87-2020 Adhesive for Wall and Floor Tile Installation", the intrinsic tensile bond strength, tensile bond strength after immersion in water, tensile bond strength after heat aging, and tensile bond strength after freeze-thaw cycles of the two-component tile adhesive without any treatment were tested, and the results are shown in Table 3.

[0058] Table 3 Performance of Two-Component Tile Adhesive

[0059] According to the "TCBMF87-2020 Adhesive for Wall and Floor Tile Installation" standard, the intrinsic tensile bond strength, tensile bond strength after immersion in water, tensile bond strength after heat aging, and tensile bond strength after freeze-thaw cycles of two-component tile adhesive must all be ≥0.5MPa.

[0060] As shown in Table 3, the intrinsic tensile bond strength, tensile bond strength after immersion in water, tensile bond strength after heat aging, and tensile bond strength after freeze-thaw cycles of the two-component ceramic tile adhesive provided in this embodiment of the invention all meet the requirement of ≥0.5MPa, and all tensile bond strengths are qualified; Figure 1 As shown in the embodiment of the present invention, the two-component ceramic tile adhesive has moderate viscosity, obvious burr tips, and excellent roughening effect.

[0061] As shown in Table 3, the tensile bond strength of the two-component ceramic tile adhesives provided in Comparative Examples 1 and 5 after immersion in water and after freeze-thaw cycles are both unqualified and not applicable.

[0062] Depend on Figure 3 and Figures 2-14 It can be seen that Comparative Example 2 has a moderate viscosity, obvious roughening effect, and all tensile bond strengths are qualified. However, its styrene-butadiene emulsion content is too high, significantly increasing the product cost, and therefore it is not applicable. The two-component tile adhesives provided by Comparative Examples 3, 7, 9, and 11-13 all have lower viscosity than the examples, resulting in a poorer roughening effect and less obvious roughening effect, and are therefore not applicable. The two-component tile adhesives provided by Comparative Examples 4, 6, 8, and 10 all have higher viscosity than the examples, increasing the difficulty of construction, and are therefore not applicable.

[0063] This invention provides a two-component ceramic tile backing adhesive with a textured finish, its preparation method, and its application, which has at least the following advantages: The alkali-swellable non-associative thickener used in this invention forms a cross-linked structure through copolymerization of acrylic acid and its esters. Its molecules contain acidic groups such as carboxyl groups, which swell after neutralization under alkaline conditions (pH 8-9), thus significantly increasing the viscosity of the system. This thickener features high-efficiency thickening, low shear viscosity, excellent anti-sagging and texture retention properties, reduced roller coating splatter, good long-term stability, and strong formulation compatibility.

[0064] By adding cellulose ether and starch ether to the powder, a thixotropic structure with a high yield value can be formed in a short time, which greatly reduces the sag when the two-component tile adhesive is applied to a vertical surface, thus improving the roughening effect. The molecular chains of cellulose ether and starch ether form a flocculation network by bridging cement particles, which directly improves the shear resistance of the two-component tile adhesive and reduces the risk of tile hollowing and falling off.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A two-component ceramic tile adhesive, characterized in that, Including liquid and powder materials; The raw materials for the liquid include styrene-butadiene emulsion, thickener, defoamer, bactericide and water; The raw materials for the powder include cement, quartz sand, cellulose ether, and starch ether. The thickener is an alkali-swellable non-associated thickener, which is an anionic acrylic polymer emulsion.

2. The two-component ceramic tile adhesive according to claim 1, characterized in that, In the liquid material, the mass ratio of styrene-butadiene emulsion, thickener, defoamer, bactericide and water is (300~500):(1~4):(1~4):(1~4):(500~700).

3. The two-component ceramic tile adhesive according to claim 1, characterized in that, In the powder, the mass ratio of cement, quartz sand, cellulose ether and starch ether is (400~600):(400~600):(1~4):(1~4).

4. The two-component ceramic tile adhesive according to claim 1, characterized in that, The mass ratio of the liquid to the powder is 1:(2.7~3.3).

5. The two-component ceramic tile adhesive according to claim 1, characterized in that, The cement includes either gray silicate cement or white silicate cement.

6. The two-component ceramic tile adhesive according to claim 1, characterized in that, The particle size of the quartz sand is 70~120 mesh.

7. The two-component ceramic tile adhesive according to claim 1, characterized in that, The defoamer includes any one of silicone defoamers and mineral oil defoamers.

8. A method for preparing a two-component ceramic tile backing adhesive as described in any one of claims 1 to 7, characterized in that, The process includes uniformly mixing the raw materials of the liquid component, uniformly mixing the raw materials of the powder component, and then mixing the liquid component and the powder component in a certain proportion to obtain the two-component tile back adhesive.

9. The application of a two-component tile adhesive as described in any one of claims 1 to 7 in the field of tile laying.

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