Hot-melt tile adhesive and its preparation method and application

Abstract

This application discloses a hot-melt tile adhesive, its preparation method, and application. The hot-melt tile adhesive comprises the following raw materials by weight: 10% to 25% polyolefin elastomer, 10% to 25% silicone rubber, 40% to 50% petroleum resin, 10% to 20% naphthenic oil, 5% to 10% filler, and 1% to 5% additive. The tile adhesive exhibits high bonding strength and good flexibility.

Description

Technical Field

[0001] The present application relates to the field of polymer adhesive technology, and specifically to a hot-melt tile adhesive and its preparation method and application. Background Art

[0002] Ceramic tiles are a widely used building material, primarily used for the decoration and protection of floors and walls. They are typically made from natural minerals such as clay, quartz, and feldspar through a process of grinding, mixing, pressing, glazing, and sintering. Their wear resistance, stain resistance, ease of cleaning, and aesthetic appeal make them extremely popular in residential, commercial, and public space renovations.

[0003] With the advancement of manufacturing technology, the water absorption rate of ceramic tiles is getting lower and lower, which is accompanied by the continuous improvement of the performance requirements of ceramic tile installation materials. When ceramic tile installation materials cannot meet the requirements, there will be a risk of falling tiles, posing a serious safety hazard. This puts higher requirements on the bonding performance and weather resistance of ceramic tile installation materials. Summary of the Invention

[0004] In response to the problems existing in the prior art, the embodiments of the present application provide a hot-melt tile adhesive and a preparation method and application thereof, in order to improve the reliability of tile installation and reduce the risk of tile falling off.

[0005] An embodiment of the first aspect of the present application provides a hot-melt tile adhesive, comprising the following raw materials in percentage by weight: 10% to 25% polyolefin elastomer, 10% to 25% silicone rubber, 40% to 50% petroleum resin, 10% to 20% cyclohexane oil, 5% to 10% filler, and 1% to 5% additive.

[0006] In some embodiments, the mass ratio of the polyolefin elastomer to the silicone rubber is (1-2):1.

[0007] In some embodiments, the mass ratio of the petroleum resin to the naphthenic oil is (3-5):1.

[0008] In some embodiments, the polyolefin elastomer includes one or more of ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-pentene copolymer, ethylene-hexene copolymer, and ethylene-octene copolymer.

[0009] In some embodiments, the polyolefin elastomer has a tensile strength greater than or equal to 8 MPa, an elongation at break greater than or equal to 500%, and a Shore hardness greater than or equal to 60A.

[0010] In some embodiments, the silicone rubber has a tensile strength greater than or equal to 8 MPa, an elongation at break greater than or equal to 80%, and a Shore hardness greater than or equal to 70A.

[0011] In some embodiments, the petroleum resin includes one or both of C5 hydrogenated resin and C9 hydrogenated resin.

[0012] In some embodiments, the petroleum resin includes C5 hydrogenated resin and C9 hydrogenated resin, and the mass ratio of the C5 hydrogenated resin to the C9 hydrogenated resin is (1-3):1.

[0013] In some embodiments, the saturated hydrocarbon content of the naphthenic oil is 87.55% to 93.86%, and the acid value is less than 0.15 mgKOH / g.

[0014] In some embodiments, the filler includes one or more of barium sulfate, quartz powder, and talc powder.

[0015] In some embodiments, the particle size of the filler is less than or equal to 0.02 mm.

[0016] In some embodiments, the auxiliary agent includes one or more of an antioxidant, a light stabilizer, and an ultraviolet light absorber.

[0017] The embodiment of the second aspect of the present application provides a method for preparing a hot-melt tile adhesive, comprising the following steps:

[0018] The polyolefin elastomer, silicone rubber, 40% to 60% of petroleum resin, and 40% to 60% of an additive are vacuum kneaded at a first temperature to obtain a first molten material;

[0019] adding the remaining amount of petroleum resin and the remaining amount of auxiliary agent to the first molten material at the first temperature and continuing to perform vacuum kneading to obtain a second molten material;

[0020] At the second temperature, a viscosity regulator and a filler are added to the second molten material and vacuum kneaded to obtain a tile adhesive.

[0021] In some embodiments, the first temperature is 120°C to 140°C.

[0022] In some embodiments, the second temperature is 90°C to 100°C.

[0023] An embodiment of the third aspect of the present application provides an application of a hot-melt tile adhesive.

[0024] In some embodiments, the application includes:

[0025] Providing tiles to be used and the hot-melt tile adhesive according to any one of claims 1 to 9;

[0026] The hot melt tile adhesive is heated to a molten state and then applied to the back of the tile to be used to obtain a pre-coated adhesive layer, wherein the thickness of the pre-coated adhesive layer is 1 mm to 3 mm;

[0027] A release film is attached to the surface of the pre-coated adhesive layer to obtain a ceramic tile with a pre-coated adhesive layer. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. In the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present application; and, for clarity, the sizes of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish an entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present application, it should be noted that, unless otherwise stated, the meaning of "plurality" is more than two. Moreover, the term "comprises", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements not only include those elements, but also include other elements not clearly listed, or also include elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprises..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements.

[0030] The solutions for improving the stability of tile installation and reducing the risk of tile falling in related technologies mainly include the following:

[0031] One is to use high-grade tile adhesive. This type of tile adhesive uses a high amount of redispersible latex powder to make the product have higher bonding strength, can better resist various environmental conditions, and can be suitable for the bonding and installation of larger-sized and heavier tiles.

[0032] The second is to use a single-component backing adhesive, which is mainly based on a high molecular polymer emulsion with a low glass transition temperature, supplemented by a mixture of various auxiliary agents. This emulsion-type backing adhesive has the properties of a pressure-sensitive adhesive. After film formation, it is flexible and can adapt to the slight deformation of tiles and substrates, reducing the stress caused by temperature changes or substrate shrinkage, thereby reducing the risk of hollowing and falling off.

[0033] The third method is to use a two-component adhesive. This type of adhesive is generally composed of a powder and a liquid. The powder is mainly composed of a mixture of silicate cement, aggregate, and additives. These ingredients provide the basic structure and strength of the adhesive, ensuring it has good adhesion and durability. The liquid is a mixture of polymer emulsion, water, and additives. Polymer emulsion is the main component of the liquid, which provides the adhesive's viscosity and flexibility. When using, the powder and liquid need to be evenly mixed in a certain proportion and then applied to the back of the tile. The adhesive can adhere tightly to the back of the tile and form a good bond with the tile bonding mortar, providing a bridging effect.

[0034] The fourth method is to use dry-hanging construction. This method does not rely on traditional cement mortar as a bonding material. Instead, it uses a special dry-hanging system to fix the tiles directly to the wall using metal hangers. The metal hangers and structural adhesive used in the dry-hanging method are highly durable, able to withstand harsh weather conditions and reduce the risk of tile falling off. However, the metal hangers, structural adhesive, and other materials required for the dry-hanging method are relatively expensive, and the construction process is complex, so the overall cost is higher than the traditional wet-hanging method.

[0035] However, each of these solutions has its drawbacks. High-grade tile adhesives are typically more expensive, potentially increasing the cost of renovation or construction projects. This is especially true when the wall surface is uneven on the construction site, making thin-layer application impractical. Leveling the adhesive layer requires increasing the adhesive layer's thickness, which not only reduces initial strength but also causes shrinkage and weakens bond strength later in the process.

[0036] The main component of a one-component adhesive is a polymer emulsion with a low glass transition temperature. During the emulsification process, the polymer produces a large amount of hydrophilic substances with a low affinity for water. After the emulsion loses water and solidifies into a film, re-immersion in water can degrade its performance. This type of product is not suitable for tile installation on floors, outdoors, in areas exposed to long-term water exposure (such as pools), or in locations subject to water pressure. The emulsion in this type of product primarily forms its film by losing water, which has high environmental requirements. Low temperature and high humidity environments can affect film formation and hinder construction progress.

[0037] Two-component adhesive is made from a mixture of two different materials, so precise mixing is required before use. This process is relatively tedious and requires the user to master the correct mixing ratio and method. Uneven mixing or incorrect proportions may affect the adhesive's adhesion and effectiveness. The curing and performance of two-component adhesive are significantly affected by environmental factors such as temperature and humidity. Use in unsuitable environments may result in a slow cure rate, thus affecting the adhesive's effectiveness.

[0038] The dry hanging method requires stainless steel hangers, frames, and other fixing materials, as well as corresponding construction techniques and equipment, all of which increase construction costs. This cost is particularly significant for large-scale paving or high-end renovation projects. Furthermore, the dry hanging method is relatively complex, involving multiple steps such as wall preparation, frame installation, and hanger positioning, which can extend the construction period. This is especially true when it comes to addressing details and ensuring construction quality, requiring additional time and labor.

[0039] In view of this, the present invention provides a hot-melt tile adhesive with low requirements for ambient temperature and humidity, excellent water resistance, and suitability for long-term water immersion. It also exhibits excellent bonding strength, requires a low coating amount per unit area, and is low in cost. Furthermore, the tile adhesive provided in the present invention can be pre-applied to the back of the tile at the factory, thereby reducing the number of steps required at the tile installation site and improving construction efficiency.

[0040] Hot melt tile adhesive

[0041] An embodiment of the first aspect of the present application provides a hot-melt tile adhesive, comprising the following raw materials in percentage by weight: 10% to 25% polyolefin elastomer, 10% to 25% silicone rubber, 40% to 50% petroleum resin, 10% to 20% cyclohexane oil, 5% to 10% filler, and 1% to 5% additive.

[0042] Polyolefin elastomers combine the properties of rubber and thermoplastics. They exhibit the properties of rubber at room temperature and possess the processing characteristics of thermoplastics at high temperatures, allowing them to be plasticized and remolded. The saturated structure of their backbones provides them with excellent heat and UV resistance, enhancing the aging resistance of tile adhesives for outdoor use. Silicone rubber, a polymeric elastic material with both inorganic and organic properties, exhibits excellent heat and weathering resistance. When used in conjunction with polyolefin elastomers, this further enhances the weathering properties of tile adhesives. Petroleum resins reduce the melt viscosity of tile adhesives, allowing them to wet the tile surface well after application and partially penetrate the tile itself. This improves the adhesive's bond strength and flexibility, imparting a high degree of deformation resistance. This allows them to adapt to minor deformations of the tile and substrate, reducing stress caused by temperature fluctuations or substrate shrinkage. Naphthenic oil can further reduce the melt viscosity of tile adhesive, making it easier to apply while increasing initial tack and improving its bonding properties. The combination of naphthenic oil and petroleum resin can enhance wettability and permeability, further improving the adhesive's bond strength. Fillers can increase the adhesive's adhesion and strength, improving its fluidity and abrasion resistance. The addition of fillers can enhance the adhesive's adhesion to various surfaces, providing better bonding strength and securing the tiles. Adding additives can further improve the adhesive's durability and stability.

[0043] In the embodiment of the present application, polyolefin elastomer and silicone rubber are used as the main components of the tile back adhesive, which can make the tile back adhesive have good weather resistance, and the polyolefin elastomer and silicone rubber have good water resistance, which can make the tile back adhesive have high resistance to environmental corrosion; the addition of cyclohexane oil and petroleum resin can improve the permeability of the tile back adhesive on the tile surface, enhance the bonding strength of the tile back adhesive, and at the same time make the tile back adhesive have higher flexibility.

[0044] In some embodiments, the mass ratio of the polyolefin elastomer to the silicone rubber may be (1-2):1.

[0045] Polyolefin elastomers have high thermoplasticity, allowing for hot-melt processing of tile adhesives, resulting in excellent fluidity after the heated and melted adhesive. Silicone rubber, on the other hand, offers high strength and weather resistance, improving the adhesive's bond strength and stability. Research has shown that by controlling the mass ratio of polyolefin elastomer to tile adhesive within the above range, the adhesive maintains high strength and stability while further enhancing its processing properties.

[0046] In some embodiments, the mass ratio of petroleum resin to naphthenic oil may be (3-5):1.

[0047] Both petroleum resin and naphthenic oil can reduce the melt viscosity of tile adhesive, making the tile adhesive have better fluidity and easier construction. Research has found that by controlling the mass ratio of petroleum resin and naphthenic oil within the above range, the tile adhesive can have a lower melt viscosity while further improving the permeability of the tile adhesive on the tile surface, thereby further improving the bonding strength of the tile adhesive and enhancing the stability and fixing effect of the tile installation.

[0048] In some embodiments, the polyolefin elastomer includes one or more of ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-pentene copolymer, ethylene-hexene copolymer, and ethylene-octene copolymer.

[0049] In some embodiments, the polyolefin elastomer may have a tensile strength greater than or equal to 8 MPa, an elongation at break greater than or equal to 500%, and a Shore hardness greater than or equal to 60A.

[0050] In some embodiments, the silicone rubber may have a tensile strength greater than or equal to 8 MPa, an elongation at break greater than or equal to 80%, and a Shore hardness greater than or equal to 70A.

[0051] In some embodiments, the petroleum resin may include one or both of a C5 hydrogenated resin and a C9 hydrogenated resin.

[0052] In some embodiments, the petroleum resin may include C5 hydrogenated resin and C9 hydrogenated resin, and the mass ratio of the C5 hydrogenated resin to the C9 hydrogenated resin may be (1-3):1.

[0053] By using C5 hydrogenated resin and C9 hydrogenated resin together and limiting their ratio within the above range, the melting elasticity of the tile adhesive can be further reduced, the penetration effect of the tile adhesive on the back of the tile can be improved, and thus its bonding strength and stability can be improved.

[0054] In some embodiments, the softening point of the C5 hydrogenated resin may be 100°C to 110°C, and the flash point may be greater than or equal to 200°C.

[0055] In some embodiments, the softening point of the C9 hydrogenated resin may be 100°C to 130°C, and the flash point may be greater than or equal to 200°C.

[0056] The softening point and flash point of the above-mentioned C5 hydrogenated resin and C9 hydrogenated resin are respectively within the above-mentioned ranges, which can further improve the bonding strength and stability of the tile backing adhesive.

[0057] In some embodiments, the saturated hydrocarbon content of the naphthenic oil may be 87.55% to 93.86%, and the acid value may be less than 0.15 mgKOH / g.

[0058] In some embodiments, the filler may include one or more of barium sulfate, quartz powder, and talc powder.

[0059] In some embodiments, the particle size of the filler may be less than or equal to 0.02 mm.

[0060] In some embodiments, the auxiliary agent may include one or more of an antioxidant, a light stabilizer, and an ultraviolet light absorber.

[0061] In some embodiments, the antioxidant may include one or more of a hindered phenol antioxidant and a phosphite antioxidant.

[0062] In some embodiments, the light stabilizer may include one or more of a hindered amine light stabilizer and titanium dioxide.

[0063] In some embodiments, the ultraviolet light absorber may include one or more of benzophenone, benzotriazole, acrylonitrile derivatives, and triazine compounds.

[0064] Preparation method of hot-melt tile adhesive

[0065] The embodiment of the second aspect of the present application provides a method for preparing a hot-melt tile adhesive, comprising the following steps:

[0066] S10, kneading a polyolefin elastomer, silicone rubber, 40% to 60% of petroleum resin, and 40% to 60% of an additive at a first temperature to obtain a first molten material;

[0067] S20, adding the remaining amount of petroleum resin and the remaining amount of auxiliary agent to the first molten material at the first temperature and continuing to knead to obtain a second molten material;

[0068] S30, adding a viscosity regulator and a filler to the second molten material at a second temperature and kneading the mixture to obtain a tile adhesive.

[0069] By adopting the above method to prepare tile backing adhesive, the various component raw materials can be evenly dispersed and mixed, which is beneficial to improving the stability of the tile backing adhesive. It can be used to prepare the hot-melt tile backing adhesive in the embodiment of the first aspect of this application. The prepared hot-melt tile backing adhesive has the same effect and performance as the hot-melt tile backing adhesive in the embodiment of the first aspect of this application.

[0070] In some embodiments, the first temperature may be 120°C to 140°C.

[0071] In some embodiments, the second temperature may be 90°C to 100°C.

[0072] In some embodiments, the vacuum degree of vacuum kneading can be -0.06 MPa to -0.1 MPa. Using vacuum kneading can reduce the internal bubbles generated during the preparation of tile adhesive and improve the uniformity and stability of the mixing of the various components.

[0073] application

[0074] The embodiment of the third aspect of the present application provides the application of the hot-melt tile adhesive of the embodiment of the first aspect of the present application in tile construction.

[0075] In some embodiments, application of hot melt tile adhesive includes pre-applying the tile adhesive to the back of the tile:

[0076] Provide ready-to-use ceramic tiles and the hot-melt ceramic tile adhesive according to the first embodiment of the present application;

[0077] Heat the hot melt tile adhesive to a molten state and then apply it to the back of the tile to be used to obtain a pre-coated adhesive layer, wherein the thickness of the pre-coated adhesive layer can be 1 mm to 3 mm;

[0078] An isolation film is attached to the surface of the pre-coated adhesive layer to obtain a ceramic tile with a pre-coated adhesive layer.

[0079] The tile back glue provided in the embodiment of the present application can be pre-applied on the back of the tile to form a pre-applied glue layer when the tile leaves the factory. During the tile construction, the pre-applied glue layer can be heated to partially or completely melt the surface before pasting. This reduces the gluing process during on-site tile construction and improves construction efficiency.

[0080] Evaluation Method

[0081] The present application also provides a method for evaluating hot-melt tile adhesive, including a method for evaluating long-term water immersion performance and a method for evaluating attenuation deformation, wherein:

[0082] The long-term water immersion performance evaluation method includes: evenly applying hot-melt tile adhesive to the glass surface to a thickness of 1mm to 3mm. After coating, the glass is left to stand for 24 hours at a standard temperature and humidity (23±2°C, 50%±5% relative humidity). The glass is then immersed in room temperature water for 14 days and then removed to observe whether the tile adhesive has fallen off. This method can be used to evaluate the long-term water immersion performance of hot-melt tile adhesive and its water resistance.

[0083] Deformation Attenuation: The tensile bond strength of hot-melt tile adhesive is tested according to standard methods, and the displacement at 50% decrement of the tensile bond strength is measured. This method can be used to test the adhesive properties of hot-melt tile adhesive and evaluate whether the adhesive can maintain its adhesion for a long time after the bond strength has decremented.

[0084] Example

[0085] The present invention is described below with reference to specific examples. It should be noted that the examples described below are exemplary and are intended only to explain the present application, and should not be construed as limiting the present application. Where specific techniques or conditions are not specified in the examples, the techniques or conditions described in the literature in this area or the product specifications are used. Unless otherwise specified, the ratios used in the following examples are all weight ratios. Reagents or instruments used without manufacturer's indication are all commercially available conventional products.

[0086] The sources or specifications of some of the raw materials used in the examples of this application are as follows:

[0087] raw material model source polyolefin elastomers POE 8150 Dow silicone rubber RBB-2030-80 Dow C5 hydrogenated resin LH110 PetroChina Lanzhou Petrochemical Company C9 hydrogenated resin JQ1 Henghe New Material Technology Co., Ltd. Naphthenic oil KN4006 PetroChina Karamay Petrochemical Company antioxidants Irgafos 168 BASF Light stabilizers R-215 Medium core titanium dioxide UV absorbers Tinuvin 326 BASF

[0088] Example 1

[0089] Hot-melt tile adhesive includes the following raw materials in percentage by weight: polyolefin elastomer 23%, silicone rubber 10%, C5 hydrogenated resin 15%, C9 hydrogenated resin 25%, naphthenic oil 15%, filler barium sulfate 7%, antioxidant 2%, light stabilizer 1%, and ultraviolet light absorber 2%.

[0090] Prepared by the following method:

[0091] S10, preheating the kneader to 130°C, and half an hour after reaching the set preheating temperature, starting the main machine for stirring at a stirring speed of 50 rpm;

[0092] S20, putting the polyolefin elastomer, silicone rubber, 50% of petroleum resin and 50% of additives into a kneader, maintaining the temperature at 130° C., evacuating to -0.08 MPa, and vacuum kneading for 2 hours to obtain a molten material;

[0093] S30, the remaining 50% of the petroleum resin and the 50% of the additives are put into the kneader, the temperature is maintained at 130°C and the vacuum degree is -0.08MPa, and the vacuum kneading is continued for 0.5h to completely melt the materials;

[0094] S40, cooling to 100°C, adding naphthenic oil and filler, evacuating to -0.08MPa, vacuum kneading for 1h to completely melt the material, and discharging the material to obtain hot-melt tile adhesive.

[0095] Examples 2 to 5

[0096] The preparation method of hot-melt tile adhesive is the same as that in Example 1, except that the raw material ratio is adjusted, as shown in Table 1.

[0097] Comparative Examples 1 to 2

[0098] The preparation method of hot-melt tile adhesive is the same as that in Example 1, except that the raw material ratio is adjusted, as shown in Table 1.

[0099] Table 1

[0100]

[0101] Example 6

[0102] The raw material composition of the hot melt tile adhesive is the same as that of Example 1 and is prepared by the following method:

[0103] S10, preheating the kneader to 130°C, and half an hour after reaching the set preheating temperature, starting the main machine for stirring at a stirring speed of 50 rpm;

[0104] S20, putting the polyolefin elastomer, silicone rubber, 80% of petroleum resin and 80% of additives into a kneader, maintaining the temperature at 130° C., evacuating to -0.08 MPa, and vacuum kneading for 2 hours to obtain a molten material;

[0105] S30, the remaining 20% of the petroleum resin and 20% of the additives are put into the kneader, the temperature is maintained at 130°C and the vacuum degree is -0.08MPa, and the vacuum kneading is continued for 0.5h to completely melt the materials;

[0106] S40, cooling to 100°C, adding naphthenic oil and filler, evacuating to -0.08MPa, vacuum kneading for 1h to completely melt the material, and discharging the material to obtain hot-melt tile adhesive.

[0107] Example 7

[0108] The raw material composition of the hot melt tile adhesive is the same as that of Example 1 and is prepared by the following method:

[0109] S10, preheating the kneader to 130°C, and half an hour after reaching the set preheating temperature, starting the main machine for stirring at a stirring speed of 50 rpm;

[0110] S20, putting the polyolefin elastomer, silicone rubber, petroleum resin and additives into a kneader, maintaining the temperature at 130° C., evacuating to -0.08 MPa, and vacuum kneading for 2.5 hours to obtain a molten material;

[0111] S30, cooling to 100°C, adding naphthenic oil and filler, evacuating to -0.08MPa, vacuum kneading for 1h to completely melt the material, and discharging the material to obtain hot-melt tile adhesive.

[0112] Test section

[0113] Water immersion performance: Apply hot-melt tile adhesive on the glass surface with a coating thickness of 2mm, let it stand for 24 hours under standard temperature and humidity (23±2℃, 50±5% relative humidity), then soak it in room temperature water for 14 days, take it out and check whether the adhesive material has fallen off.

[0114] Attenuation deformation: Use a 60*60mm serrated trowel to scrape a layer of tile adhesive on the concrete slab, then place 50*50mm tiles (water absorption rate <0.5%) with a 2mm thick hot-melt tile backing adhesive on the back on the adhesive layer, place them with a 2kg pressure block for 30 seconds, and test the tensile force value on a tensile testing machine after curing under standard conditions for 14 days. The deformation displacement when the maximum force value and the attenuation of 50% are recorded through the tensile testing machine force value change curve.

[0115] The test results are shown in Table 2.

[0116] Table 2

[0117] project Process implementation status Water immersion performance Attenuation deformation / mm Example 1 good Not falling off 12 Example 2 good Not falling off 10 Example 3 good Not falling off 14 Example 4 good Not falling off 11 Example 5 good Not falling off 12 Example 6 better Not falling off 8 Example 7 Difference Not falling off 3 Comparative Example 1 Difference Not falling off 3 Comparative Example 2 good Falling off 2

[0118] According to the data in Table 2, the tile adhesive provided in the embodiment of the present application has good water immersion performance and will not fall off after being soaked in water for 14 days; at the same time, the hot-melt tile adhesive has good bonding strength and toughness and has a large attenuation deformation.

[0119] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A hot melt tile adhesive, characterized in that: The hot-melt tile adhesive comprises the following raw materials in percentage by weight: 10% to 25% polyolefin elastomer, 10% to 25% silicone rubber, 40% to 50% petroleum resin, 10% to 20% naphthenic oil, 5% to 10% filler, and 1% to 5% additive. The hot-melt tile adhesive is prepared by the following method: The polyolefin elastomer, silicone rubber, 40% to 60% of petroleum resin, and 40% to 60% of an additive are vacuum kneaded at a first temperature to obtain a first molten material; adding the remaining amount of petroleum resin and the remaining amount of auxiliary agent to the first molten material at the first temperature and continuing to perform vacuum kneading to obtain a second molten material; At the second temperature, a viscosity regulator and a filler are added to the second molten material and vacuum kneaded to obtain a tile adhesive.

2. The hot melt tile adhesive according to claim 1, characterized in that: The raw materials of the tile adhesive meet the following requirements: The mass ratio of the polyolefin elastomer to the silicone rubber is (1-2):1; and / or The mass ratio of the petroleum resin to the naphthenic oil is (3-5):

1.

3. The hot melt tile adhesive according to claim 1, characterized in that: The polyolefin elastomer comprises one or more of ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-pentene copolymer, ethylene-hexene copolymer and ethylene-octene copolymer; and / or The polyolefin elastomer has a tensile strength greater than or equal to 8 MPa, an elongation at break greater than or equal to 500%, and a Shore hardness greater than or equal to 60A; and / or The silicone rubber has a tensile strength greater than or equal to 8 MPa, an elongation at break greater than or equal to 80%, and a Shore hardness greater than or equal to 70A; and / or The saturated hydrocarbon content of the naphthenic oil is 87.55% to 93.86%, and the acid value is less than 0.15 mgKOH / g; and / or The filler includes one or more of barium sulfate, quartz powder, and talc; and / or The particle size of the filler is less than or equal to 0.02 mm.

4. The hot melt tile adhesive according to claim 1, characterized in that: The petroleum resin includes one or both of C5 hydrogenated resin and C9 hydrogenated resin.

5. The hot melt tile adhesive according to claim 4, characterized in that: The petroleum resin includes C5 hydrogenated resin and C9 hydrogenated resin, and the mass ratio of the C5 hydrogenated resin to the C9 hydrogenated resin is (1-3):

1.

6. The hot melt tile adhesive according to claim 1, characterized in that: The auxiliary agent includes one or more of an antioxidant, a light stabilizer and an ultraviolet light absorber.

7. The hot melt tile adhesive according to claim 1, characterized in that: The first temperature is 120°C to 140°C; and / or The second temperature is 90°C to 100°C.

8. Use of the hot-melt tile adhesive according to any one of claims 1 to 7 in tile construction.

9. The use according to claim 8, characterized in that include: Providing tiles to be used and the hot-melt tile adhesive according to any one of claims 1 to 7; The hot-melt tile adhesive is heated to a molten state and then applied to the back of the tile to be used to obtain a pre-coated adhesive layer, wherein the thickness of the pre-coated adhesive layer is 1 mm to 3 mm; A release film is attached to the surface of the pre-coated adhesive layer to obtain a ceramic tile with a pre-coated adhesive layer.

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