CN116102282A

CN116102282A - Tile adhesive flexibility promoting composition and tile adhesive

Info

Publication number: CN116102282A
Application number: CN202211103378.5A
Authority: CN
Inventors: 丁烨; 董峰亮; 何曙光; 张永进; 方晓华
Original assignee: Sika Shanghai Management Co Ltd
Current assignee: Sika Shanghai Management Co Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-05-12

Abstract

The invention relates to a ceramic tile adhesive flexibility promoting composition, which comprises the following components in percentage by weight: wood fiber 5-25%, polypropylene fiber 5-25%, high water absorption resin 10-35%, diacetone acrylamide 10-20%, adipic acid dihydrazide 10-20%. After the composition is used as an important component of the tile adhesive and is mixed with other components to prepare the tile adhesive, the flexibility of the tile adhesive can be greatly improved, and the tile adhesive is used for paving tiles, so that adverse phenomena such as hollowness and cracking of the tiles can be effectively reduced.

Description

Tile adhesive flexibility promoting composition and tile adhesive

Technical Field

The invention relates to the technical field of building materials, in particular to a ceramic tile adhesive flexibility promoting composition and a ceramic tile adhesive.

Background

The ceramic tile is an indispensable building material in building decoration, and has various types and different specifications and sizes, and consumers can select different types of ceramic tiles according to preference and application.

With the development of the ceramic tile market, ceramic tiles of large plates and oversized plates are becoming more popular, and ceramic tiles of this type are not suitable for being laid by adopting a traditional cement mortar, and are usually required to be laid by adopting special ceramic tile adhesives. The ceramic tile glue commonly used in the market is poor in glue quality, and after the ceramic tile of a large plate or an oversized plate is paved by adopting the common ceramic tile glue, bad phenomena such as hollowing or cracking can often occur.

Disclosure of Invention

Based on this, the present application provides a tile glue flexibility promoting composition that can be an important component of a tile glue to enhance the flexibility of the tile glue.

Furthermore, the application also provides the tile adhesive capable of reducing the phenomena of hollowing, cracking and the like of the tile.

An embodiment of the application provides a ceramic tile adhesive flexibility promoting composition, which comprises the following components in percentage by weight:

in one embodiment, the tile glue flexibility promoting composition meets at least one of the following conditions:

(1) The length of the wood fiber is 0.5 mm-5 mm;

(2) The length of the polypropylene fiber is 0.5 mm-5 mm.

In one embodiment, the composition comprises the following components in percentage by weight:

in one embodiment, the composition further comprises at least one of rubber powder, vitrified microbeads, and metakaolin.

(1) The fineness of the rubber powder is 60-90 meshes;

(2) The fineness of the vitrified microbeads is 90-120 meshes;

(3) The fineness of the metakaolin is D90 more than or equal to 15 mu m.

An embodiment of the present application provides a tile glue comprising the components of the tile glue flexibility enhancing composition as described in any of the embodiments above.

In one embodiment, the flexibility level of the tile glue is not lower than the level S1, and the tile glue comprises the following components in percentage by weight:

in one embodiment, the flexibility level of the tile glue is not lower than the level S2, and the tile glue comprises the following components in percentage by weight:

the tile glue flexibility promoting composition is the tile glue flexibility promoting composition described in any of the embodiments above.

In one embodiment, the tile glue satisfies at least one of the following conditions:

(1) The cement is Portland cement with the strength of more than or equal to 42.5Mpa in 28 days;

(2) The fineness of the first silica sand is 30-70 meshes;

(3) The fineness of the second silica sand is 70-140 meshes.

An embodiment of the present application provides a tile paving method, including the following steps:

tiles are tiled using tile adhesives as described in any of the embodiments above.

An embodiment of the present application provides a building structure comprising a substrate and tiles bonded by a tile glue as described in any of the embodiments above.

The ceramic tile glue flexibility promoting composition contains wood fiber, polypropylene fiber, high water absorption resin, diacetone acrylamide and adipic dihydrazide, wherein the wood fiber and the polypropylene fiber are favorable for improving the toughness of the ceramic tile glue, and after being mixed with a mortar system such as cement in the ceramic tile glue, the ceramic tile glue is distributed in a three-dimensional direction in the mortar system, so that a space three-dimensional structure can be formed, the phenomenon of local stress concentration in mortar can be effectively improved, and crack sources for paving ceramic tiles are reduced; the super absorbent resin can realize the pre-water absorption treatment of the tile adhesive after the tile adhesive is paved, and can effectively reduce the shrinkage of the tile adhesive in the later period of paving the tile adhesive due to dehydration and drying, thereby being beneficial to reducing the internal stress and meeting the requirement of improving the flexibility of the tile adhesive; the adipic acid dihydrazide and the diacetone acrylamide can be crosslinked under the condition of water content, which is beneficial to improving the flexibility of the tile adhesive. The wood fiber, the polypropylene fiber, the high water-absorbing resin, the diacetone acrylamide and the adipic dihydrazide are mixed according to a specific weight percentage to prepare the tile adhesive flexibility promoting composition, and after the composition is used as an important component of the tile adhesive to be mixed with other components to prepare the tile adhesive, the flexibility of the tile adhesive can be greatly improved, and the tile adhesive is used for paving tiles, so that the phenomena of hollowness, cracking and the like of the tiles can be effectively reduced.

Further, after the ceramic tile adhesive flexibility promoting composition is adopted, the addition amount of cellulose ether and redispersible emulsion powder with higher cost in the ceramic tile adhesive can be greatly reduced, the cost is reduced, and the ceramic tile adhesive is more environment-friendly.

Detailed Description

In order that the invention may be understood more fully, the invention will be described with reference to the following examples. This invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In this context, the technical features described in open form include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

An embodiment herein provides a tile glue flexibility promoting composition comprising the following components in weight percent:

the tile of big board or super board often appears the bad phenomenon such as hollowness or fracture in the later stage of paving, and the main reason that causes these bad phenomena is because the bonding strength of the ceramic tile glue that adopts is not enough on the one hand, and is not firm to the ceramic tile, on the other hand because the flexibility (i.e. lateral deformability) of the ceramic tile glue that adopts is relatively poor, when the ceramic tile is glued to the tile with the ceramic tile, when the ceramic tile glue receives stress action to take place deformation, can't produce corresponding deformation and offset this kind of effect.

For this reason, the industry standard of JC/T547-2017 ceramic tile adhesive specifies that the strength level of cement-based tile adhesives suitable for bonding large or oversized tile tiles needs to be above the level of C2 enhancement, specifically, the design requirement for the bonding strength of tile adhesives is: the tensile bonding strength is more than or equal to 1.0Mpa without treatment, the tensile bonding strength after soaking is more than or equal to 1.0Mpa, and the tensile bonding strength after freeze thawing cycle is more than or equal to 1.0Mpa. Further, the industry standard also requires that the flexibility of the tile glue reaches the level S1 or the level S2, and specifically, the design requirement for the flexibility of the tile glue is: when the flexibility level is S1, the transverse deformation capacity of the tile adhesive is more than 2.5mm, and when the flexibility level is S2, the transverse deformation capacity of the tile adhesive is more than 5mm.

The inventor finds that after the ceramic tile adhesive flexibility promoting composition is further prepared into ceramic tile adhesive, the tensile bonding strength is not less than 1.0Mpa in no treatment, after soaking and after freeze thawing cycle, and meets the grade requirement of high-grade ceramic tile adhesive on basic performance C2 enhancement. Furthermore, the composition can greatly improve the flexibility of the tile adhesive, has stronger transverse deformation capability when being stressed, and can reach the S1 level and even S2 level flexibility standard.

Further, the inventors have found that C2 reinforced tile adhesives, now commercially available for use in tiles of large or ultra-large panels, require the use of significant amounts of cellulose ether and gum powder in the formulation of the tile adhesive to achieve a higher level of flexibility, either of the S1 or S2 level. The cellulose ether can be methyl cellulose, hydroxypropyl methyl cellulose and the like, has the functions of water retention, bonding, lubrication and the like, can effectively improve the bonding strength and flexibility of the tile glue, and can reduce tile cracking. The rubber powder is usually redispersible latex powder, and further can be, for example, vinyl acetate-ethylene copolymer, acrylic acid redispersible rubber powder, styrene-acrylic rubber powder and the like, and the rubber powder, especially the redispersible latex powder, has obvious enhancement effects on the aspects of bonding strength, water resistance, freeze-thawing resistance, flexibility and the like of tile glue. When the flexibility grade of the conventional C2 reinforced ceramic tile adhesive in the market reaches the S1 grade, the content of cellulose ether is usually over 0.3 percent, and the content of rubber powder materials such as redispersible latex powder is usually over 5 percent; when the flexibility grade reaches the S2 grade, the content of cellulose ether is usually over 0.3 percent, and the content of rubber powder materials such as redispersible latex powder is usually over 12 percent, however, the raw materials such as cellulose ether and redispersible latex powder on the market are quite expensive, the cost of the ceramic tile glue is high due to the fact that a large amount of cellulose ether and redispersible latex powder are added, the energy consumption is high in the production process of the cellulose ether and the redispersible latex powder, a large amount of toxic waste water is easy to generate, and the environment is difficult to degrade and has adverse effects. The tile glue flexibility promoting composition can replace part of cellulose ether and redispersible latex powder in the traditional tile glue formula, after a certain amount of the tile glue flexibility promoting composition is added in the tile glue formula, the bonding strength and flexibility grade of the tile glue can still meet the industry standard under the condition of reducing the consumption of the cellulose ether and the redispersible latex powder, the consumption of the cellulose ether and the redispersible latex powder and other raw materials with high cost price can be reduced, the introduced tile glue flexibility promoting composition is economical, the production cost of products can be greatly reduced while the tile glue performance grade obtained after the formula is improved is unchanged, and the consumption of the cellulose ether and the redispersible latex powder can be reduced, so that the tile glue is more green and environment-friendly.

Specifically, in the tile glue flexibility promoting composition described above:

the wood fiber and the polypropylene fiber are favorable for improving the toughness of the tile adhesive, and after being mixed with a mortar system such as cement in the tile adhesive, the tile adhesive is distributed in a three-dimensional direction in the mortar system, so that a space three-dimensional structure can be formed, the phenomenon of local stress concentration in the mortar can be effectively improved, and the crack source for paving the tile is reduced.

In a specific example, the length of the wood fibers is 0.5mm to 5mm. It will be appreciated that the length of the wood fibers may be, for example, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc., without being limited thereto. The wood fibers may be of a single length or may be a mixture of lengths. Preferably, the length of the wood fibers is 1mm to 3mm.

In a specific example, the polypropylene fibers have a length of 0.5mm to 5mm. It is understood that the length of the polypropylene fibers may be, for example, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc., without being limited thereto. The polypropylene fibers may be of a single length or may be a blend of lengths. Preferably, the polypropylene fibers have a length of 1mm to 3mm.

The super absorbent resin (SAP) can realize the pre-water absorption treatment of the tile adhesive after paving, can effectively reduce the shrinkage of the tile adhesive in the later period of paving by the tile adhesive because of dehydration and drying, thereby being beneficial to reducing the internal stress and meeting the requirement of improving the flexibility of the tile adhesive. In a specific example, the superabsorbent resin is derived from BASF, germany, product model number

S 3911F。/>

Adipic acid dihydrazide is a difunctional group compound, diacetone acrylamide has oxygen atoms and nitrogen atoms with large electronegativity, is an important monomer containing unsaturated vinyl groups, also contains amino groups, can be crosslinked under the condition of water content after being compounded and used, and can effectively improve the water resistance and flexibility of ceramic tile glue.

The ceramic tile adhesive flexibility promoting composition is prepared by mixing wood fiber, polypropylene fiber, high water absorbent resin, diacetone acrylamide and adipic dihydrazide according to a specific weight percentage, and after the composition is used as an important component of the ceramic tile adhesive and mixed with other components to prepare the ceramic tile adhesive, the ceramic tile adhesive can reach the C2 enhanced performance index, is suitable for paving large plates or oversized plates, the flexibility of the ceramic tile adhesive is greatly improved, the standard of the flexibility grade S1 or above can be reached, and the ceramic tile adhesive can be used for paving ceramic tiles, so that the phenomena of hollowness, cracking and the like of the ceramic tiles can be effectively reduced.

In a specific example, for a tile glue with a flexibility rating of S1, the tile glue flexibility promoting composition preferably comprises, in weight percent:

the ceramic tile adhesive flexibility promoting composition is prepared according to the weight percentage, so that the ceramic tile adhesive with the flexibility grade of S1 has better overall performance.

It will be appreciated that the above-described tile gum flexibility promoting composition may be further formulated into tile gums having a flexibility rating of not less than S1 as one of the important components of the tile gum.

In a specific example, the tile glue with the flexibility level not lower than the level S1 comprises the following components in percentage by weight:

further, when the flexibility level of the tile glue is to reach the S2 level, a higher requirement is also placed on the tile glue flexibility promoting composition because of the requirement that the tile glue have a higher lateral deformability. Based on the above, the inventor further improves the ceramic tile adhesive flexibility promoting composition, and based on the original components, the ceramic tile adhesive flexibility promoting composition further comprises at least one of rubber powder, vitrified micro bubbles and metakaolin.

In a specific example, for a tile glue with a flexibility rating of S2, the tile glue flexibility promoting composition preferably comprises, in weight percent:

the rubber powder is preferably renewable rubber powder, mainly derived from waste rubber, tires and the like, is an environment-friendly material widely applied, and the flexibility of the tile adhesive can be further improved by introducing the rubber powder into the auxiliary agent. In a specific example, the fineness of the rubber powder is 60 mesh to 90 mesh. It is understood that the fineness of the rubber powder may be, for example, 60 mesh, 65 mesh, 70 mesh, 75 mesh, 80 mesh, 85 mesh, 90 mesh, or the like, without being limited thereto. The rubber powder can have single fineness or can be mixed with multiple fineness. Preferably, the fineness of the rubber powder is 70 to 85 mesh.

The vitrified microbead is a lightweight aggregate, has very stable performance, can improve the fluidity and self-resistant strength of cement-based tile adhesive, is favorable for reducing the material shrinkage caused by drying and water loss, further can further improve the bonding strength and the flexibility of the tile adhesive, and is favorable for reducing the adverse phenomena of hollowness, cracking and the like generated after the tile is paved and pasted. In a specific example, the fineness of the vitrified microbeads is 90 mesh to 120 mesh. It is understood that the fineness of the vitrified microbeads may be, for example, 90 mesh, 95 mesh, 100 mesh, 105 mesh, 110 mesh, 115 mesh, 120 mesh, etc., without being limited thereto. The vitrified microbead can have single fineness or can be a mixture of multiple fineness. Preferably, the fineness of the vitrified microbeads is 95-105 mesh.

The rubber powder and the vitrified micro bubbles are compounded and introduced into the ceramic tile adhesive flexibility promoting composition system, so that the influence on the strength is reduced as much as possible while the integral dry density of the ceramic tile adhesive is reduced, and the integral performance of a ceramic tile adhesive product is improved.

The metakaolin is a high-activity mineral admixture, and the addition of the metakaolin can improve the early strength of the tile adhesive, and the tile adhesive has outstanding advantages in the aspects of adhesive property, flexibility and the like when being matched with other raw materials in an auxiliary agent system. In a specific example, the fineness of the metakaolin is D90+.15 μm.

After at least one of a certain amount of rubber powder, vitrified microbeads and metakaolin is doped into the original ceramic tile adhesive flexibility promoting composition system consisting of wood fiber, polypropylene fiber, high water absorbent resin, diacetone acrylamide and adipic acid dihydrazide, the tensile bonding strength of the ceramic tile adhesive after no treatment, immersion and freeze thawing cycle can meet the grade requirement of the high-grade ceramic tile adhesive on basic performance C2 enhancement, and the transverse deformation capability of the ceramic tile adhesive is further improved to more than 5mm, thereby meeting the requirement of a flexible grade S2.

It will be appreciated that the tile glue flexibility promoting composition formulated for a tile glue having a flexibility rating of S2, and further, that tile glue having a flexibility rating of not less than S2 may be formed. In a specific example, the tile glue with the flexibility level not lower than the level S2 comprises the following components in percentage by weight:

it will be appreciated that the raw materials of the tile glue, whether it be a tile glue having a flexibility rating of S1 or a flexibility rating of S2, are all commonly used raw materials for making tile glue, except for the tile glue flexibility promoting composition provided in one embodiment of the present invention.

Further, the cement may be, for example, ordinary Portland cement having a 28-day strength of 42.5MPa or more.

Further, the first silica sand may be, for example, ordinary silica sand having a fineness of 30 mesh to 70 mesh.

Further, the second silica sand may be, for example, ordinary silica sand having a fineness of 70 mesh to 140 mesh.

It can be appreciated that the above-mentioned tile glue can be prepared by directly adding the prepared flexibility promoting composition according to the percentage of each component, and directly mixing the corresponding components with other components of the tile glue according to the formula of the flexibility promoting composition.

An embodiment herein also provides a tile paving method comprising the steps of:

tiles were tiled using tile glue as in any of the examples above.

Further, the method may further include a step of preparing the tile glue flexibility-promoting composition in any of the examples above, and a step of compounding the tile glue flexibility-promoting composition with other raw materials to prepare the tile glue having a specific performance level.

It will be appreciated that the tile glue described above is typically applied after being mixed with water or other liquid.

An embodiment herein also provides a building structure comprising a substrate and tiles bonded by a tile glue as in any of the examples above.

The present invention will be described in detail with reference to the following examples, in which all raw materials are commercially available unless otherwise specified.

Wherein:

the manufacturer of the super absorbent resin is German BASF with the brand number of

S 3911F；

The manufacturer of cellulose ether is North Tianpu cellulose Limited company with the brand number of 1005p;

the manufacturer of the redispersible emulsion powder is Wake chemical (China) limited company, and the brand is 5010N;

the manufacturer of metakaolin is BASF, germany, with the brand Metamax high activity metakaolin.

Example 1

The flexibility grade of the tile adhesive is S1 grade, and specifically, the composition formula of the tile adhesive flexibility promoting composition and the tile adhesive is as follows:

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 20% of wood fiber, 20% of polypropylene fiber, 30% of super absorbent resin, 15% of diacetone acrylamide and 15% of adipic acid dihydrazide.

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 33% cement, 0.7% calcium formate, 20% first silica sand, 39% second silica sand, 0.3% cellulose ether, 4% redispersible latex powder, 3% tile glue flexibility promoting composition.

Example 2

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 31% cement, 0.7% calcium formate, 20% first silica sand, 39% second silica sand, 0.3% cellulose ether, 4% redispersible latex powder, 5% tile glue flexibility promoting composition.

Example 3

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 29% cement, 0.7% calcium formate, 20% first silica sand, 39% second silica sand, 0.3% cellulose ether, 4% redispersible latex powder, 7% tile glue flexibility promoting composition.

Example 4

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 29.15% cement, 0.7% calcium formate, 20% first silica sand, 39% second silica sand, 0.15% cellulose ether, 4% redispersible latex powder, 7% tile glue flexibility promoting composition.

Example 5

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 15% of wood fiber, 15% of polypropylene fiber, 30% of super absorbent resin, 20% of diacetone acrylamide and 20% of adipic acid dihydrazide.

Example 6

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 25% of wood fiber, 25% of polypropylene fiber, 26% of super absorbent resin, 12% of diacetone acrylamide and 12% of adipic acid dihydrazide.

Comparative example 1

The composition for promoting the flexibility of the tile adhesive and the tile adhesive are prepared from the following components in percentage by weight:

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 50% of super absorbent resin, 25% of diacetone acrylamide and 25% of adipic acid dihydrazide.

Comparative example 2:

the traditional tile adhesive with the flexibility grade of S1 does not contain the tile adhesive flexibility promoting composition, and the tile adhesive comprises the following components in percentage by weight:

ceramic tile adhesive: the composition comprises the following components in percentage by weight: 35% of cement, 0.7% of calcium formate, 20% of first silica sand, 39% of second silica sand, 0.3% of cellulose ether and 5% of redispersible emulsion powder.

The tile adhesives prepared in examples 1 to 6 and comparative examples 1 to 2 were tested for bonding strength and transverse deformation performance according to the industry standard of JC/T547-2017 ceramic tile adhesive, and simultaneously, tile experiments were performed on the wall surface after pre-leveling, using 600 x 600 vitrified tiles on the market, and the double-sided adhesive was used during tile adhesion, the thickness of the tile adhesive layer was controlled to be about 1.5cm, 4 tiles were adhered to the tile adhesives prepared in each example and comparative example, and the empty drum condition was observed after 28d of curing. The test results are shown in Table 1 below.

TABLE 1 results of tile glue Performance test for examples 1-6 and comparative examples 1-2

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As can be seen from table 1, in examples 1 to 6, when the flexibility-promoting composition for tile adhesives comprising wood fiber, polypropylene fiber, super absorbent resin, diacetone acrylamide and adipic dihydrazide was added, the adhesive strength of the tile adhesives was somewhat lost when the tile adhesives were not treated, but the adhesive strength was improved after the soaking and freeze thawing cycles, as compared with comparative example 2. Even if the consumption of the redispersible emulsion powder is reduced by 20%, the bonding strength of the tile adhesive after no treatment, soaking and freeze thawing cycle is still more than or equal to 1.0MPa, the standard of the C2 strength grade is met, the transverse deformation capacity is more than or equal to 2.5mm, the standard of the flexible grade S1 grade is met, and the comparison of the embodiment 1 to the embodiment 4 shows that the transverse deformation capacity is also improved to a certain extent along with the improvement of the addition amount of the tile adhesive flexibility promoting composition, namely the flexibility of the tile adhesive is better.

Further, when the prepared tile adhesive is used for paving tiles and observing the hollowing condition, compared with comparative example 2, the hollowing condition of the tiles can be obviously improved after the tile adhesive flexibility promoting composition is added into the components of the tile adhesive in examples 1 to 6, and the hollowing condition is reduced by 25% when the adding amount of the tile adhesive flexibility promoting composition reaches 7%, so that the effect is obvious.

In examples 4 to 6, compared with comparative example 1, the mass percentages of the components of the tile glue flexibility promoting composition were adjusted, the lateral deformability of the tile glue prepared in examples 4 to 6 is not less than 2.5mm, and the lateral deformability of the tile glue prepared in comparative example 1 is less than 2.5mm, so that when the mass percentages of the components of the tile glue flexibility promoting composition exceed the ranges of 5 to 25% of wood fiber, 5 to 25% of polypropylene fiber, 10 to 35% of superabsorbent resin, 10 to 20% of diacetone acrylamide and 10 to 20% of adipic acid dihydrazide, the prepared tile glue cannot reach the standard of the flexibility grade S1 or above.

Example 7

The flexibility grade of the tile glue is S2 grade, and specifically, the composition formula of the tile glue flexibility promoting composition and the tile glue is as follows:

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 10% of wood fiber, 10% of polypropylene fiber, 10% of high water absorption resin, 15% of diacetone acrylamide, 15% of adipic acid dihydrazide, 10% of rubber powder, 20% of vitrified microbead and 10% of metakaolin.

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 28% of cement, 0.7% of calcium formate, 17% of first silica sand, 35% of second silica sand, 0.3% of cellulose ether, 9% of redispersible latex powder and 10% of ceramic tile adhesive flexibility promoting composition.

Example 8

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 26% cement, 0.7% calcium formate, 17% first silica sand, 35% second silica sand, 0.3% cellulose ether, 9% redispersible latex powder, 12% tile glue flexibility promoting composition.

Example 9

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 24% cement, 0.7% calcium formate, 17% first silica sand, 35% second silica sand, 0.3% cellulose ether, 9% redispersible latex powder, 14% tile glue flexibility promoting composition.

Example 10

Ceramic tile adhesive: the composition comprises the following components in percentage by weight: 24% cement, 0.7% calcium formate, 17% first silica sand, 35.1% second silica sand, 0.2% cellulose ether, 9% redispersible latex powder, 14% tile glue flexibility promoting composition.

Example 11

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 10% of wood fiber, 10% of polypropylene fiber, 20% of high water absorption resin, 10% of diacetone acrylamide, 10% of adipic acid dihydrazide, 10% of rubber powder, 20% of vitrified microbead and 10% of metakaolin.

Example 12

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 12% of wood fiber, 12% of polypropylene fiber, 10% of super absorbent resin, 10% of diacetone acrylamide, 10% of adipic acid dihydrazide, 15% of rubber powder, 25% of vitrified microbeads and 6% of metakaolin.

Example 13

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 5% of wood fiber, 5% of polypropylene fiber, 15% of high water absorption resin, 20% of diacetone acrylamide, 20% of adipic acid dihydrazide, 5% of rubber powder, 15% of vitrified microbeads and 15% of metakaolin.

Comparative example 3

tile glue flexibility promoting composition: the composition comprises the following components in percentage by weight: 20% of wood fiber, 20% of polypropylene fiber, 10% of high water absorption resin, 0% of diacetone acrylamide, 0% of adipic acid dihydrazide, 20% of rubber powder, 20% of vitrified microbeads and 10% of metakaolin.

Comparative example 4

The traditional tile adhesive with the flexibility grade of S2 does not contain the tile adhesive flexibility promoting composition, and the tile adhesive comprises the following components in percentage by weight:

ceramic tile adhesive: the composition comprises the following components in percentage by weight: 30% of cement, 0.7% of calcium formate, 20% of first silica sand, 37% of second silica sand, 0.3% of cellulose ether and 12% of redispersible emulsion powder.

The tile adhesives with the flexibility grade of S2 prepared in examples 6 to 11 and comparative examples 3 to 4 are subjected to bonding strength and transverse deformation performance test according to the industry standard of JC/T547-2017 ceramic tile adhesive, meanwhile, a tile experiment is carried out on a wall surface which is leveled in advance, a vitrified tile large brick with 600 x 600 in the market is used, double-sided adhesive coating is adopted during tile sticking, the thickness of a tile adhesive layer is controlled to be about 1.5cm, 4 tiles are adhered to the tile adhesives prepared in each example and comparative example, and empty drum conditions are observed after curing for 28 d. The test results are shown in Table 2 below.

TABLE 2 results of tile adhesive Performance test for examples 7-13 and comparative examples 3-4

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As can be seen from Table 2 above, in examples 7 to 13, compared with comparative example 4, after the tile adhesive flexibility promoting composition comprising wood fiber, polypropylene fiber, super absorbent resin, diacetone acrylamide, adipic acid dihydrazide, rubber powder, vitrified microbead and metakaolin was added, the bonding strength of the tile adhesive was somewhat lost without treatment, but the bonding strength after soaking and freeze thawing cycles was improved. And even if the dosage of the redispersible emulsion powder is reduced by 25 percent and the dosage of the cellulose ether is reduced by 33 percent, the bonding strength of the tile adhesive after no treatment, soaking and freeze thawing cycle is still more than or equal to 1.0MPa, the standard of C2 grade is met, the transverse deformation capacity is more than or equal to 5mm, and the standard of S2 grade of the flexible grade is met.

As can be seen from the comparison of examples 7 to 9, the flexibility of the tile adhesive promotes the improvement of the addition amount of the composition, and the transverse deformability is also improved to a certain extent, namely, the flexibility of the tile adhesive is better.

In the examples 10 to 13 and the comparative example 3, when the flexibility-promoting composition for tile adhesives was used in the range of 5 to 15% of wood fiber, 5 to 15% of polypropylene fiber, 10 to 20% of high water-absorbent resin, 10 to 20% of diacetone acrylamide, 10 to 20% of adipic acid dihydrazide, 5 to 15% of rubber powder, 15 to 25% of vitrified micro bubble and 5 to 15% of metakaolin, the overall strength of the tile adhesives was in accordance with the C2-grade strength standard, the flexibility grade was in accordance with the S2-grade standard, and when the flexibility was out of the range, the strength and flexibility of the tile adhesives were reduced, and the tile adhesives of the comparative example 3 could not reach the C2-grade strength standard.

Further, the prepared tile adhesive is used for tile paving to observe the hollowing condition, so that the addition of the tile adhesive flexibility promoting composition in the components of the tile adhesive is beneficial to reducing hollowing, and particularly, when the addition amount of the tile adhesive flexibility promoting composition reaches 14%, no hollowing can be realized completely, and the tile paving effect is good.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The ceramic tile adhesive flexibility promoting composition is characterized by comprising the following components in percentage by weight:

2. the tile glue flexibility promoting composition of claim 1, wherein the tile glue flexibility promoting composition meets at least one of the following conditions:

(1) The length of the wood fiber is 0.5 mm-5 mm;

(2) The length of the polypropylene fiber is 0.5 mm-5 mm.

3. The tile glue flexibility promoting composition according to any one of claims 1 to 2, comprising the following components in weight percent:

4. the tile glue flexibility promoting composition of any one of claims 1-2, wherein the component further comprises at least one of rubber powder, vitrified microbeads, and metakaolin.

5. The tile glue flexibility promoting composition of claim 4, comprising the following components in weight percent:

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6. the tile glue flexibility promoting composition of claim 5, wherein the tile glue flexibility promoting composition meets at least one of the following conditions:

(1) The fineness of the rubber powder is 60-90 meshes;

(2) The fineness of the vitrified microbeads is 90-120 meshes;

(3) The fineness of the metakaolin is D90 more than or equal to 15 mu m.

7. A tile glue comprising the components of the tile glue flexibility enhancing composition of any one of claims 1 to 6.

8. The tile glue of claim 7, wherein the tile glue has a flexibility rating of not less than S1, the tile glue comprising, in weight percent:

9. the tile glue of claim 7, wherein the tile glue has a flexibility rating of no less than S2 rating, the tile glue comprising the following components in weight percent:

the tile adhesive flexibility-promoting composition according to any one of claims 4 to 6.

10. The tile glue of any one of claims 8 to 9, wherein the tile glue meets at least one of the following conditions:

(2) The fineness of the first silica sand is 30-70 meshes;

(3) The fineness of the second silica sand is 70-140 meshes.