Long-acting mildew-proof sealant and preparation method thereof

Abstract

The invention discloses a long-acting mildew-proof sealant and a preparation method thereof. The sealant comprises a component A and a component B. The component A is prepared from silane modified polyether, a reinforcing filler, hydrophobic fumed silica, a light stabilizer, an antioxidant, a coupling agent and an epoxy hardener. The component B is prepared from epoxy resin, hydrophobic fumed silica, a reinforcing filler, water and a catalyst, and the coupling agent comprises a fluorine-containing coupling agent and an amino silane coupling agent in a weight ratio of (1.5-2.5): 1. The sealant has the advantages of good mildew-proof effect, long-acting mildew resistance, good elasticity, bending resistance, scraping resistance, small internal stress, difficult generation of the common cracking problem of the sealant, no ceramic tile damage caused by displacement and other conditions, high bonding strength with the ceramic tile, difficult shedding, environmental protection, beautiful appearance, and great prospect in the field of the sealant.

Description

Technical Field

[0001] The present invention belongs to the technical field of seam beautifying agents, and more specifically, the present invention relates to a long-lasting mildew-proof two-component seam beautifying agent and a preparation method thereof. Background Art

[0002] Sealing agents are usually used in kitchen and bathroom systems. Due to the humid environment, mold is easy to grow. Therefore, there are relatively high requirements for the mildew resistance of seaming glue. Traditional mildew-proof seaming glue generally adopts the addition of mildew-proof agents to achieve the mildew-proof effect. For example, patent CN116285822A prepares a mildew-proof two-component epoxy seaming agent by adding antibacterial agents, nanofibers for toughening, and modified carbon black as a reinforcing filler; patent CN117903739A discloses a long-lasting environmentally friendly mildew-proof silane-modified polyether sealant, which is added with mildew-proof agents WJ400, BCO or SYG20P, and has 3 times the mildew-proof effect of level 0, and the mildew-proof effect of level 0 is as long as 84 days; patent CN117304219A discloses a mildew-proof seaming agent, which greatly improves the mildew-proof effect of the seaming agent by adding a modified mildew-proof agent obtained by the reaction of alkali metal salts of 1,2-benzisothiazolin-3-one and trimethoxychlorosilane.

[0003] However, in actual use, as time goes by, the mildew inhibitor will migrate to the surface, and the mildew prevention effect will decrease over time.

[0004] In addition, traditional caulking agents are generally based on two-component epoxy systems. This type of caulking agent is generally strong and hard after curing. However, due to the high cross-linking density of epoxy adhesive polymers, it has relatively poor elasticity, is brittle after curing, and has relatively poor yellowing resistance. After the caulking agent is applied to tiles, due to long-term thermal expansion and contraction, the caulking agent may easily crack on the one hand, and on the other hand, it may cause the tiles to crack and damage. Summary of the invention

[0005] Based on this, the object of the present invention is to provide a long-lasting anti-mildew caulking agent and a preparation method thereof, wherein the anti-mildew performance of the caulking agent can reach level 0 for 168 days, and the caulking agent has good elasticity and yellowing resistance.

[0006] The specific technical solutions for achieving the above-mentioned invention objectives include the following.

[0007] In a first aspect of the present invention, a long-lasting anti-mildew caulking agent is provided, which comprises a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight:

[0008]

[0009] The B component is prepared from the following raw materials in parts by weight:

[0010]

[0011] Wherein, the coupling agent is a fluorine-containing coupling agent and an aminosilane coupling agent in a weight ratio of 1.5 to 2.5:1.

[0012] The second aspect of the present invention provides a method for preparing the above-mentioned long-lasting mildew-proof seam beautifying agent, comprising the following steps:

[0013] (1) Add silane-modified polyether, reinforcing filler, hydrophobic fumed silica, light stabilizer, and antioxidant into a planetary machine, mix for 50 to 70 minutes at 60 to 80 degrees Celsius and a vacuum degree of -0.06 MPa to -0.08 MPa, cool to below 50 degrees Celsius, add coupling agent and epoxy curing agent, mix for 20 to 40 minutes, and obtain component A;

[0014] (2) Add epoxy resin, hydrophobic fumed silica, reinforcing filler and water into a planetary mill, mix for 50 to 70 minutes at 60°C to 80°C and a vacuum degree of -0.06 MPa to -0.08 MPa, cool to below 50°C, add a catalyst, and mix for 20 to 40 minutes to obtain component B.

[0015] The present invention adds a fluorine-containing coupling agent and an aminosilane coupling agent compounded in a certain weight ratio into a base polymer, and no mildew inhibitor is needed to be added, so that the seam sealant can have a mildew-proof effect, and the mildew-proof effect does not decrease with the passage of time, and can achieve 0-level mildew resistance for 168 days, thereby solving the problem that the mildew-proof effect of traditional mildew-proof seam sealants decreases with the passage of time.

[0016] The present invention uses silane-modified polyether compounded with epoxy resin as the basic polymer, and cooperates with other components in a specific ratio, so that the seam sealant has good elasticity, bending resistance, scratch resistance, small internal stress, is not prone to the common cracking problem of seam sealants, and will not cause damage to tiles due to displacement and the like. It has high bonding strength with tiles, is not easy to fall off, has excellent yellowing resistance, low VOC, is environmentally friendly and beautiful, and has good application prospects. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described more fully below. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0018] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0019] Unless otherwise specified, the examples were performed according to conventional experimental conditions or the conditions recommended by the manufacturer's instructions.

[0020] In some embodiments of the present invention, a long-lasting anti-mildew seam beautifying agent is disclosed, which includes component A and component B. In parts by weight, component A is prepared from the following raw materials:

[0021]

[0022] The B component is prepared from the following raw materials:

[0023]

[0024] Wherein, the coupling agent is a fluorine-containing coupling agent and an aminosilane coupling agent in a weight ratio of 1.5 to 2.5:1.

[0025] In some embodiments, a long-lasting mildew-proof seam beautifying agent includes component A and component B, wherein component A is prepared from the following raw materials in parts by weight:

[0026]

[0027]

[0028] The B component is prepared from the following raw materials:

[0029]

[0030] In some embodiments, a long-lasting mildew-proof seam beautifying agent includes component A and component B, wherein component A is prepared from the following raw materials in parts by weight:

[0031]

[0032] The B component is prepared from the following raw materials:

[0033]

[0034]

[0035] In some embodiments, the fluorine-containing coupling agent is one or more of 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropylmethyldimethoxysilane, trifluoropropyltriethoxysilane, tridecafluorooctyltrimethoxysilane, and tridecafluorooctyltriethoxysilane; and / or, the aminosilane coupling agent is one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-aminoethyl-γ-aminopropyltrimethoxysilane, and N-aminoethyl-γ-aminopropyltriethoxysilane.

[0036] In some embodiments, the coupling agent is tridecafluorooctyltrimethoxysilane and N-aminoethyl-γ-aminopropyltrimethoxysilane.

[0037] In some of the embodiments, the weight ratio of tridecafluorooctyltrimethoxysilane to N-aminoethyl-γ-aminopropyltrimethoxysilane is 1.5-2.0:1, more preferably 1.7-1.8:1.

[0038] In some of the embodiments, the silane-modified polyether is one or more of SAX750, SAX400, SAX575, SAX530, SAX580, SAX590, MAX923, MAX602, MA480, MA490 of Kaneka Chemical, XT 55, STP-E10, STP-E15, STP-E30, STP-E35, XB502 of Wacker.

[0039] In some of the embodiments, the silane-modified polyether is STP-E10, MA490 and SAX750 in a weight ratio of 1 to 1.5:1:1.

[0040] In some embodiments, the reinforcing filler is one or more of nano calcium carbonate, heavy calcium carbonate, silica powder, talc, and kaolin.

[0041] In some of the embodiments, the reinforcing filler is nano-calcium carbonate and silicon powder in a weight ratio of 4.5 to 5.5:1.

[0042] In some embodiments, the light stabilizer is one or more of Tinuvin UV-P, Tinuvin UV-9, Tinuvin 326, Tinuvin, Tinuvin 540, and Tinuvin 770 of BASF.

[0043] In some embodiments, the light stabilizer is Tinuvin 326 and Tinuvin 770 in a weight ratio of 0.8 to 1.2:1.

[0044] In some of the embodiments, the antioxidant is one or more of IRGANOX 1135, IRGANOX 1010, and IRGANOX 245 of BASF.

[0045] In some embodiments, the epoxy curing agent is one or more of aliphatic amine, alicyclic amine, and polyether amine.

[0046] In some embodiments, the epoxy resin is bisphenol A epoxy resin.

[0047] In some of the embodiments, the catalyst is one or more of dibutyltin dilaurate, di(dodecylthio)dibutyltin, tetrabutyl-1,3-bisdistannoxane, dioctyltin diacetate, chelated tin, stannous octoate or diorganotin bis(β-diketone ester).

[0048] In other embodiments of the present invention, a method for preparing the above-mentioned long-lasting mildew-proof seam beautifying agent is disclosed, which comprises the following steps:

[0049] (1) Add silane-modified polyether, reinforcing filler, hydrophobic fumed silica, light stabilizer, and antioxidant into a planetary machine, mix for 50 to 70 minutes at 60 to 80 degrees Celsius and a vacuum degree of -0.06 MPa to -0.08 MPa, cool to below 50 degrees Celsius, add coupling agent and epoxy curing agent, mix for 20 to 40 minutes, and obtain component A;

[0050] (2) Add epoxy resin, hydrophobic fumed silica, reinforcing filler and water into a planetary mill, mix for 50 to 70 minutes at 60°C to 80°C and a vacuum degree of -0.06 MPa to -0.08 MPa, cool to below 50°C, add a catalyst, and mix for 20 to 40 minutes to obtain component B.

[0051] The parts of raw materials described in the following examples are all parts by weight.

[0052] The present invention is described in detail below with reference to specific embodiments.

[0053] Example 1

[0054] This embodiment provides a long-lasting mildew-proof two-component seam beautifying agent, which is composed of component A and component B, wherein the preparation method of component A is as follows:

[0055] Take 100 parts of MAX923, 4 parts of hydrophobic fumed silica, 15 parts of nano calcium carbonate, 15 parts of heavy calcium carbonate, 2 parts of Tinuvin 326, 2 parts of Tinuvin 770, and 2 parts of IRGANOX 245, add them into a planetary mixer, mix at a temperature of 70°C and a vacuum degree of -0.07MPa for 60 minutes at high speed, and after cooling to below 50°C, add 3 parts of 3,3,3-trifluoropropyltrimethoxysilane and 1.5 parts of a complex coupling agent of N-aminoethyl-γ-aminopropyltrimethoxysilane (premixed in advance) and 10 parts of D220, mix for 30 minutes to prepare component A.

[0056] The preparation method of component B is as follows:

[0057] Take 100 parts of bisphenol A epoxy resin, 6 parts of hydrophobic fumed silica, 10 parts of nano calcium carbonate, 10 parts of silicon powder, and 1 part of water and add them to a planetary mill. Mix at a temperature of 60°C and a vacuum degree of -0.07 MPa for 30 minutes at high speed. After cooling to below 50°C, add 5 parts of di(dodecylthio)dibutyltin and stir for 20 minutes to obtain component B.

[0058] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0059] Example 2

[0060] This embodiment provides a long-lasting mildew-proof two-component seam beautifying agent, which is composed of component A and component B, wherein the preparation method of component A is as follows:

[0061] Take 70 parts of SAX400, 30 parts of MA490, 5 parts of hydrophobic fumed silica, 10 parts of nano calcium carbonate, 20 parts of heavy calcium carbonate, 2 parts of Tinuvin 326, 2 parts of Tinuvin 770, and 3 parts of IRGANOX 245, add them into a planetary mill, mix at a temperature of 70°C and a vacuum degree of -0.08MPa for 60 minutes, cool to below 50°C, add 3 parts of 3,3,3-trifluoropropyltrimethoxysilane and 2 parts of a complex coupling agent of N-aminoethyl-γ-aminopropyltrimethoxysilane (premixed in advance) and 12 parts of IPDA, mix for 30 minutes, and prepare component A.

[0062] The preparation method of component B is as follows:

[0063] Take 100 parts of bisphenol A resin, 5 parts of hydrophobic fumed silica, 5 parts of nano calcium carbonate, 20 parts of heavy calcium carbonate, and 0.5 parts of water and add them into a planetary mixer. Mix at a temperature of 60°C and a vacuum degree of -0.07 MPa for 30 minutes at high speed. After cooling to below 50°C, add 6 parts of dibutyltin dilaurate and stir for 20 minutes to obtain component B.

[0064] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0065] Example 3

[0066] This embodiment provides a long-lasting mildew-proof two-component seam beautifying agent, which is composed of component A and component B, wherein the preparation method of component A is as follows:

[0067] Take 70 parts of STP-E15, 30 parts of XB502, 3 parts of hydrophobic fumed silica, 25 parts of nano calcium carbonate, 5 parts of Tinuvin UV-P, and 3 parts of IRGANOX 1010, add them into a planetary mixer, mix at a temperature of 65°C and a vacuum degree of -0.08MPa for 60 minutes at high speed, cool to below 50°C, add 4.5 parts of 3,3,3-trifluoropropyltrimethoxysilane and 2.5 parts of a complex coupling agent of N-aminoethyl-γ-aminopropyltriethoxysilane (premixed in advance) and 5 parts of D230, mix for 30 minutes, and prepare component A.

[0068] The preparation method of component B is as follows:

[0069] Take 100 parts of bisphenol A resin, 4 parts of hydrophobic fumed silica, 10 parts of nano calcium carbonate, 20 parts of talc, and 0.5 parts of water and add them into a planetary mixer. Mix at a temperature of 60°C and a vacuum degree of -0.08MPa for 30 minutes at high speed. After cooling to below 50°C, add 2 parts of dibutyltin dilaurate and stir for 20 minutes to obtain component B.

[0070] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0071] Example 4

[0072] This embodiment provides a long-lasting mildew-proof two-component seam beautifying agent, which is composed of component A and component B, wherein the preparation method of component A is as follows:

[0073] Take 50 parts of MA480, 50 parts of STP-E35, 4 parts of hydrophobic fumed silica, 20 parts of nano calcium carbonate, 5 parts of heavy calcium carbonate, 3 parts of Tinuvin 326, and 1.5 parts of IRGANOX 1010, add them into a planetary machine, mix at a temperature of 70°C and a vacuum degree of -0.08MPa for 60 minutes at high speed, and after cooling to below 50°C, add 4.5 parts of trifluoropropyltriethoxysilane and 3 parts of a complex coupling agent of γ-aminopropyltrimethoxysilane (premixed in advance) and 10 parts of 1,3-BAC, mix for 30 minutes to obtain component A.

[0074] The preparation method of component B is as follows:

[0075] Take 100 parts of bisphenol A resin, 5 parts of hydrophobic fumed silica, 5 parts of nano calcium carbonate, 20 parts of heavy calcium carbonate, and 0.5 parts of water and add them into a planetary mixer. Mix at a temperature of 60°C and a vacuum degree of -0.07 MPa for 30 minutes at high speed. After cooling to below 50°C, add 6 parts of dibutyltin dilaurate and stir for 20 minutes to obtain component B.

[0076] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0077] Example 5

[0078] This embodiment provides a long-lasting mildew-proof two-component seam beautifying agent, which is composed of component A and component B, wherein the preparation method of component A is as follows:

[0079] Take 40 parts of STP-E10, 30 parts of MA490, 30 parts of SAX750, 2 parts of hydrophobic fumed silica, 25 parts of nano calcium carbonate, 5 parts of silicon powder, 2.5 parts of Tinuvin 326, 2.5 parts of Tinuvin 770, and 5 parts of IRGANOX 1010, add them to a planetary mixer, mix at a temperature of 60°C and a vacuum degree of -0.08MPa for 60 minutes, cool to below 50°C, add 3.5 parts of tridecafluorooctyltrimethoxysilane and 2 parts of a complex coupling agent of N-aminoethyl-γ-aminopropyltrimethoxysilane (premixed in advance) and 15 parts of D230, mix for 30 minutes, and prepare component A.

[0080] The preparation method of component B is as follows:

[0081] Take 100 parts of bisphenol A resin, 4 parts of hydrophobic fumed silica, 30 parts of heavy calcium carbonate, and 1 part of water and add them into a planetary mixer. Mix them at a temperature of 60°C and a vacuum degree of -0.07 MPa for 30 minutes at high speed. Cool to below 50°C, add 5 parts of tetrabutyl-1,3-bisdistannoxane, and stir for 20 minutes to obtain component B.

[0082] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0083] Comparative Example 1

[0084] This comparative example provides a two-component seam beautifying agent, which consists of component A and component B, wherein the preparation method of component A is as follows:

[0085] Take 40 parts of STP-E10, 30 parts of MA490, 30 parts of SAX750, 2 parts of hydrophobic fumed silica, 25 parts of nano calcium carbonate, 5 parts of silicon powder, 2.5 parts of Tinuvin 326, 2.5 parts of Tinuvin 770, and 5 parts of IRGANOX 1010, add them into a planetary mill, mix at a temperature of 60°C and a vacuum degree of -0.08MPa for 60 minutes, cool to below 50°C, add 5.5 parts of N-aminoethyl-γ-aminopropyltrimethoxysilane and 15 parts of D230, mix for 30 minutes, and prepare component A.

[0086] The preparation method of component B is as follows:

[0087] Take 100 parts of bisphenol A resin, 4 parts of hydrophobic fumed silica, 30 parts of heavy calcium carbonate, and 1 part of water and add them into a planetary mixer. Mix them at a temperature of 60°C and a vacuum degree of -0.07 MPa for 30 minutes at high speed. After cooling to below 50°C, add 5 parts of tetrabutyl-1,3-bisdistannoxane and stir for 20 minutes to obtain component B.

[0088] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0089] Comparative Example 2

[0090] This comparative example provides a two-component seam beautifying agent, which consists of component A and component B, wherein the preparation method of component A is as follows:

[0091] Take 100 parts of bisphenol A resin, 10 parts of hydrophobic fumed silica, 6 parts of Tinuvin 770, 1 part of AGE (epoxy reactive diluent), and 0.5 parts of defoaming agent, add them into a planetary mixer, mix at a temperature of 60°C and a vacuum degree of -0.07 MPa, mix at high speed for 100 minutes, cool to room temperature, and obtain component A.

[0092] The preparation method of component B is as follows:

[0093] 90 parts of D230, 6 parts of Tinuvin 326, 1 part of AGE, and 8 parts of fumed silica were added to a planetary mixer, stirred at high speed under vacuum with a vacuum degree of -0.09 MPa, blended for 60 minutes, and cooled to room temperature to obtain component B.

[0094] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0095] Comparative Example 3

[0096] This comparative example provides a two-component seam beautifying agent, which consists of component A and component B, wherein the preparation method of component A is the same as that of Example 5.

[0097] The preparation method of component B is as follows:

[0098] Take 100 parts of STP-E35, 4 parts of hydrophobic fumed silica, and 30 parts of heavy calcium carbonate and add them into a planetary mixer. Mix them at a temperature of 60°C and a vacuum degree of -0.07MPa for 30 minutes at high speed. Cool to below 50°C, add 5 parts of tetrabutyl-1,3-bisdistannoxane, and stir for 20 minutes to obtain component B.

[0099] When using, mix component A and component B evenly in a volume ratio of 1:1.

[0100] Comparative Example 4

[0101] This comparative example provides a two-component seam beautifying agent, which consists of component A and component B, wherein the complex coupling agent in component A is 3 parts of tridecafluorooctyltrimethoxysilane and 3 parts of N-aminoethyl-γ-aminopropyltrimethoxysilane, and other raw materials and preparation methods are the same as those in Example 5.

[0102] Comparative Example 5

[0103] This comparative example provides a two-component seam beautifying agent, which consists of component A and component B, wherein the complex coupling agent in component A is 5 parts of tridecafluorooctyltrimethoxysilane and 1 part of N-aminoethyl-γ-aminopropyltrimethoxysilane, and other raw materials and preparation methods are the same as those in Example 5.

[0104] The two-component seam beautifying agents prepared in Examples 1 to 5 and Comparative Examples 1 to 5 were subjected to the following performance tests, and the test methods were as follows:

[0105] 1. Surface drying time: Determined in accordance with GB / T 13477.5.

[0106] 2. Sag: Determined in accordance with GB / T 13477.6.

[0107] 3. Flexibility: Test according to 6.4.5 of T / CBMF 166-2022.

[0108] 4. Tensile strength: GB / T 528-2009 test, using type 1 dumbbell specimen.

[0109] 5. Elongation at break: GB / T 528-2009 test, using type 1 dumbbell specimen.

[0110] 6. Hardness: Test in accordance with GB / T 2411, using a D-type Shore hardness tester.

[0111] 7. Abrasion resistance: Test according to 6.4.7 of T / CBMF 166-2022.

[0112] 8. Resistance to liquid media: Test in accordance with 6.4.8 of T / CBMF 166-2022.

[0113] 9. Pollution resistance: Test according to 6.4.9 of T / CBMF 166-2022.

[0114] 10. Artificial weathering: Test according to 6.4.10 of T / CBMF 166-2022.

[0115] 11. Bonding strength with ceramic tiles: Test according to 6.4.11 of T / CBMF 166-2022.

[0116] 12. Mildew resistance: tested in accordance with GB / T 1741-2020.

[0117] 13. VOC: Test in accordance with GB 18583.

[0118] Table 1

[0119]

[0120]

[0121] As can be seen from Table 1, the two-component caulking adhesive prepared by using a dual-curing system of polyether and epoxy and adding a coupling agent compounded with a fluorine-containing coupling agent and an aminosilane coupling agent can be long-lasting and mildew-proof, reaching 168 days of 0-level mildew-proof (Examples 1 to 5), and because it combines the characteristics of silane-modified polyether and epoxy adhesive, it has good elasticity, bending resistance, scratch resistance, small internal stress, and is not prone to the common cracking problem of caulking agents, and will not cause damage to tiles due to displacement and the like. The tile bonding strength is high, not easy to fall off, and has good yellowing resistance.

[0122] In terms of mildew resistance, the coupling agents used in Comparative Example 1 are different from those in Example 5. Comparative Example 1 only uses an ammonia coupling agent, while Example 5 uses a coupling agent compounded with a fluorine-containing coupling agent and an ammonia coupling agent. The mildew resistance of Comparative Example 1 can only reach level 1, while the mildew resistance of Example 5 can reach level 0 mildew resistance for 168 days.

[0123] Comparative Example 2 is a typical formula of a traditional two-component epoxy system caulking glue, and its mildew resistance can only reach level 1. Compared with the caulking glue of Examples 1 to 5, it can be seen that the caulking agent using a polyether and epoxy dual-curing system has a significantly improved elongation at break, and the elasticity of the adhesive strip is significantly improved. When doing a flexibility test, no cracks were found in Examples 1 to 5, while shallow cracks appeared in Comparative Example 2. And from the results of VOC, the VOC of Examples 1 to 5 is much lower than that of Comparative Example 2. At the same time, when doing artificial climate aging, it was found that Comparative Example 2 was prone to discoloration, which was level 1, while Examples 1 to 5 were all level 0.

[0124] Comparative Example 3 is a two-component polyether system caulking adhesive. Compared with the caulking adhesives of Examples 1 to 5, it can be seen that its tensile strength is much lower than that of the caulking agent of the polyether and epoxy dual-curing system. When the bonding strength with tiles is tested, the bonding strength is also much lower than that of the caulking agent of the polyether and epoxy dual-curing system.

[0125] Comparative Example 4 is a caulking agent of a polyether and epoxy dual-curing system. The weight ratio of the fluorinated coupling agent to the ammonia coupling agent in the A component composite coupling agent is 1:1. The mass of the fluorinated coupling agent is relatively small. In the mildew resistance test, it can only achieve mildew resistance level 0 for 28 days, and cannot achieve long-term mildew resistance.

[0126] Comparative Example 4 is a caulking agent of a polyether and epoxy dual-curing system. The weight ratio of the fluorine-containing coupling agent to the ammonia coupling agent in the composite coupling agent is 5:1. The mass of the ammonia coupling agent is relatively small, and the adhesion is affected to a certain extent, resulting in the bonding strength with the ceramic tile being much lower than that of Examples 1 to 5.

[0127] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A long-lasting anti-mildew seam beautifying agent, characterized in that: It comprises component A and component B, wherein component A is prepared from the following raw materials in parts by weight: The B component is prepared from the following raw materials in parts by weight: Wherein, the coupling agent is a fluorine-containing coupling agent and an aminosilane coupling agent in a weight ratio of 1.5 to 2.5:

1.

2. The long-lasting mildew-proof seam-beautifying agent according to claim 1, characterized in that: The A component is prepared from the following raw materials in parts by weight: The B component is prepared from the following raw materials in parts by weight:

3. The long-lasting mildew-proof seam-beautifying agent according to claim 2, characterized in that: The A component is prepared from the following raw materials in parts by weight: The B component is prepared from the following raw materials in parts by weight:

4. The long-lasting anti-mildew seam beautifying agent according to any one of claims 1 to 3, characterized in that: The weight ratio of the component A to the component B is 0.8-1.2:

1.

5. The long-lasting anti-mildew seam beautifying agent according to any one of claims 1 to 3, characterized in that: The fluorine-containing coupling agent is one or more of 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropylmethyldimethoxysilane, trifluoropropyltriethoxysilane, tridecafluorooctyltrimethoxysilane, and tridecafluorooctyltriethoxysilane; and / or the aminosilane coupling agent is one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-aminoethyl-γ-aminopropyltrimethoxysilane, and N-aminoethyl-γ-aminopropyltriethoxysilane.

6. The long-lasting anti-mildew seam beautifying agent according to claim 5, characterized in that: The coupling agent is tridecafluorooctyltrimethoxysilane and N-aminoethyl-γ-aminopropyltrimethoxysilane.

7. The long-lasting anti-mildew seam beautifying agent according to claim 6, characterized in that: The weight ratio of tridecafluorooctyltrimethoxysilane to N-aminoethyl-γ-aminopropyltrimethoxysilane is 1.5-2.0:1, and more preferably 1.7-1.8:

1.

8. The long-lasting anti-mildew seam beautifying agent according to any one of claims 1 to 3, characterized in that: The silane-modified polyether is one or more of SAX750, SAX400, SAX575, SAX530, SAX580, SAX590, MAX923, MAX602, MA480, MA490 of Kaneka Chemical, XT 55, STP-E10, STP-E15, STP-E30, STP-E35, and XB502 of Wacker; And / or, the reinforcing filler is one or more of nano calcium carbonate, heavy calcium carbonate, silica powder, talc, and kaolin; And / or, the light stabilizer is one or more of Tinuvin UV-P, Tinuvin UV-9, Tinuvin 326, Tinuvin, Tinuvin 540, and Tinuvin 770 of BASF; And / or, the antioxidant is one or more of BASF's IRGANOX 1135, IRGANOX 1010, and IRGANOX 245; And / or, the epoxy curing agent is one or more of aliphatic amine, alicyclic amine, and polyether amine; And / or, the epoxy resin is bisphenol A epoxy resin; And / or, the catalyst is one or more of dibutyltin dilaurate, di(dodecylthio)dibutyltin, tetrabutyl-1,3-bisdistannoxane, dioctyltin diacetate, chelated tin, stannous octoate or diorganotin bis(β-diketone ester).

9. The long-lasting anti-mildew seam beautifying agent according to claim 8, characterized in that: The silane-modified polyether is STP-E10, MA490 and SAX750 in a weight ratio of 1 to 1.5:1:1; the reinforcing filler is nano calcium carbonate and silicon powder in a weight ratio of 4.5 to 5.5:1; and the light stabilizer is Tinuvin 326 and Tinuvin 770 in a weight ratio of 0.8 to 1.2:

1.

10. The method for preparing the long-lasting mildew-proof seam-beautifying agent according to any one of claims 1 to 9, characterized in that: The steps include: (1) Add silane-modified polyether, reinforcing filler, hydrophobic fumed silica, light stabilizer, and antioxidant into a planetary machine, mix for 50 to 70 minutes at 60 to 80 degrees Celsius and a vacuum degree of -0.06 MPa to -0.08 MPa, cool to below 50 degrees Celsius, add coupling agent and epoxy curing agent, mix for 20 to 40 minutes, and obtain component A; (2) Add epoxy resin, hydrophobic fumed silica, reinforcing filler and water into a planetary mill, mix for 50 to 70 minutes at 60°C to 80°C and a vacuum degree of -0.06 MPa to -0.08 MPa, cool to below 50°C, add a catalyst, and mix for 20 to 40 minutes to obtain component B.

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