A stain resistant, scrub resistant, silane modified polyether sealant and method of making same

Abstract

This invention belongs to the field of sealant technology and discloses a stain-resistant and scrub-resistant silane-modified polyether sealant, which is prepared by weight percentage from the following raw materials: 35-50% silane-modified polyether resin, 0.5-3% organofluorosilicone resin, 32-60% reinforcing filler, 0.5-2% thixotropic agent, 1-5% stabilizer, 0.5-4% dehydrating agent, and 0.5-4% coupling agent; wherein the silane-modified polyether resin is an α-silane-terminated silane-modified polyether resin; and the organofluorosilicone resin is obtained by hydrolysis and condensation reaction of 3-glycidoxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane. The stain-resistant and scrub-resistant silane-modified polyether sealant of this invention has excellent stain-resistant and scrub-resistant properties.

Description

Technical Field

[0001] This invention belongs to the field of sealant technology, specifically relating to a stain-resistant and washable silane-modified polyether sealant and its preparation method. Background Technology

[0002] Seams in kitchens, bathrooms, and toilets, such as those around sinks, sanitary ware, countertops, walls, and furniture, typically require waterproofing with sealant. These applications often accumulate debris, dust, and other small-molecule contaminants. Existing silicone sealants and silane-modified polyether sealants, commonly used waterproof sealants, easily attract dust and adsorb contaminants. Furthermore, these areas require frequent cleaning to maintain cleanliness. However, existing sealants have at least two problems: First, once dust or contaminants adhere to the sealant surface, they are often difficult to clean. This accumulated dust and dirt can lead to mold, discoloration, aging, and even loss of the sealant's waterproofing function. Second, the sealant is not resistant to scrubbing; repeated washing will damage the sealant surface.

[0003] Therefore, it is necessary to develop a sealant product that is stain-resistant, easy to clean, and durable to better meet people's needs for a clean, tidy, and comfortable living environment. Summary of the Invention

[0004] The purpose of this invention is to provide a silane-modified polyether sealant with anti-fouling and scrub-resistant properties.

[0005] The following technical solutions are used to achieve the above objectives.

[0006] The first aspect of this invention provides a stain-resistant and scrub-resistant silane-modified polyether sealant, prepared from raw materials comprising the following components by weight percentage:

[0007]

[0008]

[0009] Wherein, the silane-modified polyether resin is an α-silane-terminated silane-modified polyether resin.

[0010] The organofluorosilicone resin is prepared by a hydrolysis-condensation reaction of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane. The reaction process is shown below:

[0011]

[0012] In some embodiments, the viscosity of the organofluorosilicone resin is in the range of 0.5 Pa·s to 1 Pa·s.

[0013] In some embodiments, the molar ratio of the 3-glycidoxypropyltrimethoxysilane to the tridecafluorooctyltriethoxysilane is 0.7 to 1.3:1.

[0014] In some embodiments, the method for preparing the organofluorosilicone resin includes the following steps:

[0015] The 3-glycidyl etheroxypropyltrimethoxysilane and the tridecylfluorooctyltriethoxysilane were stirred and mixed in anhydrous ethanol. During the stirring process, HCl catalyst and distilled water were added, and the mixture was heated to boiling and refluxed for 3 to 5 hours.

[0016] After the reaction is complete, the pH of the reaction system is adjusted to 6.5-7.5, and the organic fluorosilicone resin is obtained by distillation at 85℃-95℃.

[0017] In some embodiments, the silane-modified polyether resin is at least one of STP-E10 resin, STP-E30 resin, STP-E35 resin, and STP-XB502 resin manufactured by Wacker Chemie AG, Germany.

[0018] In some embodiments, the reinforcing filler is at least one selected from nano-activated calcium carbonate, silica powder, heavy calcium carbonate, talc, and titanium dioxide; and / or,

[0019] The thixotropic agent is at least one of polyamide wax, hydrogenated castor oil, organobentonite, and fumed silica.

[0020] In some embodiments, the stabilizer is at least one of hindered amine light stabilizers and benzotriazole light stabilizers; preferably, the hindered amine light stabilizer is bis(2,2,6,6-tetramethyl-4-piperidine) sebacate, and the benzotriazole light stabilizer is 2-(5-chloro(2H)-benzotriazole-2-yl)-4-(methyl)-6-(tert-butyl)phenol.

[0021] In some embodiments, the dehydrating agent is a vinyl functional group silane; preferably, the dehydrating agent is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, and vinylmethyldimethoxysilane.

[0022] In some embodiments, the coupling agent is an aminosilane coupling agent; preferably, the coupling agent is at least one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

[0023] A second aspect of the present invention provides a method for preparing the antifouling and washable silane-modified polyether sealant as described above, comprising the following steps:

[0024] The silane-modified polyether resin, reinforcing filler, thixotropic agent, organofluorosilicone resin, and stabilizer are stirred and dispersed under a vacuum of 0.08–0.1 MPa for 60–120 min to obtain the base material.

[0025] Add the dehydrating agent and coupling agent to the base material in sequence and stir for 10 min to 20 min respectively. The resulting anti-fouling and washable silane-modified polyether sealant is then obtained.

[0026] In this invention, a silane-modified polyether sealant prepared using α-silane-terminated silane-modified polyether resin as the base polymer, combined with organofluorosilicone resin, thixotropic agent, reinforcing filler, stabilizer, dehydrating agent, and coupling agent as excipients, exhibits excellent antifouling and scrub resistance properties. Specifically, the organofluorosilicone resin containing 3-glycidyl etheroxypropyl groups and the silane-terminated silane-modified polyether resin as the base polymer system show good compatibility. The fluorinated long-chain alkane groups in the organofluorosilicone resin significantly reduce the surface free energy of the sealant layer after curing, reducing the sealant's adsorption of dust, thus achieving a good antifouling effect. Furthermore, the organofluorosilicone resin can participate in the cross-linking curing reaction, which is beneficial for increasing the cross-linking density of the sealant. The reduction in surface energy of the sealant layer after curing also helps reduce friction during scrubbing, thereby improving scrub resistance. In addition, the film-forming substance α-silane-terminated... When used in appropriate proportions, the silane-modified polyether resin exhibits a strong inductive effect of amide groups on electron-emitting groups, which greatly enhances the hydrolysis and polymerization activity of alkoxy groups. This improves the curing rate of the silane-modified polyether sealant, enabling it to achieve moisture curing without tin catalysts and without the need for plasticizers to enhance the curing effect. It achieves high crosslinking density, resulting in high hardness and mechanical properties of the cured sealant, improved scrub resistance, and effectively avoids the problems of plasticized polymer precipitation onto the surface and easy dust adsorption that occur with existing silane-modified polyether sealants due to the presence of plasticizers during long-term use. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more complete description will be provided below. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0028] Unless otherwise specified, experimental methods in the following examples are generally performed under standard conditions or as recommended by the manufacturer. All commonly used chemical reagents used in the examples are commercially available products.

[0029] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0030] Example 1

[0031] This embodiment provides a method for preparing a stain-resistant and washable silane-modified polyether sealant, comprising the following steps:

[0032] Weigh out the following components by weight: 35 parts of silane-modified polyether resin, 1 part of organofluorine silicone resin, 10 parts of titanium dioxide, 45 parts of nano-activated calcium carbonate, 1.5 parts of polyamide wax, 1.5 parts of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 3 parts of vinyltriethoxysilane, and 3 parts of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

[0033] The silane-modified polyether resin is XB502:STP-E30 = 2:1.

[0034] The organofluorosilicone resin is synthesized from 3-glycidoxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane in a molar ratio of 1:1, and the viscosity of the organofluorosilicone resin is 1 Pa·s.

[0035] The preparation method of this organofluorosilicone resin is as follows:

[0036] At room temperature, 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane were added to a reaction vessel, and 1.5 times the mass of anhydrous ethanol was added to the reaction vessel and stirred for 10 minutes.

[0037] Add 1% by mass of HCl catalyst (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) and 5% by mass of distilled water (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) under stirring, and heat to boiling for reflux reaction for 4 hours.

[0038] After the reaction was complete, the pH of the reaction system was adjusted to 7; ethanol, methanol and unreacted water were removed by distillation at 90°C to obtain the organofluorosilicone resin.

[0039] The weighed silane-modified polyether resin, organofluorosilicone resin, titanium dioxide, nano-activated calcium carbonate filler (pre-baked at 120℃ for 2h), polyamide wax, and bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate were added to the planetary mill feed cylinder and stirred for 20min; the mixture was then dispersed and stirred for 120min under a vacuum of 0.09MPa to obtain the base material.

[0040] Cooling water is passed through the planetary machine material cylinder to lower the temperature. After the base material temperature drops below 50°C, the vacuum is released, vinyltriethoxysilane is added, and the mixture is stirred for 20 minutes. Then, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane is added, and the mixture is stirred for 20 minutes under a vacuum of 0.09 MPa. After the vacuum is released, the material is discharged, thus obtaining the aforementioned anti-fouling and washable silane-modified polyether adhesive.

[0041] Example 2

[0042] This embodiment provides a stain-resistant and scrub-resistant silane-modified polyether sealant and its preparation method, including the following steps:

[0043] Weigh out the following components by weight: 40 parts of silane-modified polyether resin, 34 parts of talc powder, 20 parts of heavy calcium carbonate, 2 parts of organofluorine silicone resin, 2 parts of polyamide wax, 1 part of 2-(5-chloro(2H)-benzotriazol-2-yl)-4-(methyl)-6-(tert-butyl)phenol, 0.5 parts of vinyltrimethoxysilane, and 0.5 parts of 3-aminopropyltrimethoxysilane.

[0044] The silane-modified polyether resin is STP-E10.

[0045] The organofluorosilicone resin 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane are synthesized in a molar ratio of 0.8:1, and the viscosity of the organofluorosilicone resin is 0.8 Pa·s.

[0046] The preparation method of this organofluorosilicone resin is as follows:

[0047] At room temperature, 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane were added to a reaction vessel, and 1.5 times the mass of anhydrous ethanol was added to the reaction vessel and stirred for 15 minutes.

[0048] Add 1% by mass of HCl catalyst (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) and 5% by mass of distilled water (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) under stirring, and heat to boiling for reflux reaction for 5 hours.

[0049] After the reaction was complete, the pH of the reaction system was adjusted to 7; ethanol, methanol and unreacted water were removed by distillation at 90°C to obtain the organofluorosilicone resin.

[0050] The weighed silane-modified polyether resin, organofluorosilicone resin, heavy calcium carbonate and talc filler (pre-baked at 120℃ for 2h), polyamide wax, and 2-(5-chloro(2H)-benzotriazol-2-yl)-4-(methyl)-6-(tert-butyl)phenol were added to the planetary mixer's feed cylinder and stirred for 30 min; then dispersed and stirred for 100 min under a vacuum of 0.09 MPa to obtain the base material.

[0051] Cooling water is passed through the planetary machine material cylinder to lower the temperature. After the base material temperature drops below 50°C, the vacuum is released, vinyltrimethoxysilane is added, and the mixture is stirred for 15 minutes. Then, 3-aminopropyltrimethoxysilane is added, and the mixture is stirred for 20 minutes under a vacuum of 0.85 MPa. After the vacuum is released, the material is discharged, thus obtaining the aforementioned anti-fouling and washable silane-modified polyether adhesive.

[0052] Example 3

[0053] This embodiment provides a method for preparing a stain-resistant and washable silane-modified polyether sealant, comprising the following steps:

[0054] Weigh out the following components by weight: 38 parts of silane-modified polyether resin, 3 parts of organofluorine silicone resin, 51 parts of nano-activated calcium carbonate, 1.5 parts of hydrogenated castor oil, 2 parts of 2-(5-chloro(2H)-benzotriazol-2-yl)-4-(methyl)-6-(tert-butyl)phenol, 2 parts of vinyltriethoxysilane, and 2.5 parts of 3-aminopropyltriethoxysilane.

[0055] The silane-modified polyether resin is STP-E30.

[0056] The organofluorosilicone resin is synthesized from 3-glycidoxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane in a molar ratio of 1.2:1, and the viscosity of the organofluorosilicone resin is 1 Pa·s.

[0057] The preparation method of this organofluorosilicone resin is as follows:

[0058] At room temperature, 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane were added to a reaction vessel, and 1.5 times the mass of anhydrous ethanol was added to the reaction vessel and stirred for 15 minutes.

[0059] Add 1% by mass of HCl catalyst (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) and 5% by mass of distilled water (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) under stirring, and heat to boiling for reflux reaction for 4.5 hours.

[0060] After the reaction was complete, the pH of the reaction system was adjusted to 7; ethanol, methanol and unreacted water were removed by distillation at 90°C to obtain the organofluorosilicone resin.

[0061] The weighed silane-modified polyether resin, organofluorosilicone resin, nano-activated calcium carbonate (pre-baked at 120℃ for 2h), hydrogenated castor oil, and 2-(5-chloro(2H)-benzotriazol-2-yl)-4-(methyl)-6-(tert-butyl)phenol were added to the planetary mixer's feed cylinder and stirred for 25 min; then dispersed and stirred for 115 min under a vacuum of 0.09 MPa to obtain the base material.

[0062] Cooling water is passed through the planetary machine material cylinder to lower the temperature of the base material to below 50°C. After the vacuum is released, vinyltriethoxysilane is added and stirred for 15 minutes. Then, 3-aminopropyltriethoxysilane is added and stirred for 20 minutes under a vacuum of 0.09 MPa. After the vacuum is released, the material is discharged, thus obtaining the anti-fouling and washable silane-modified polyether adhesive.

[0063] Example 4

[0064] This embodiment provides a method for preparing a stain-resistant and washable silane-modified polyether sealant, comprising the following steps:

[0065] Weigh out 40 parts by weight of silane-modified polyether resin, 0.5 parts by weight of organofluorine silicone resin, 30 parts by weight of nano-activated calcium carbonate, 20 parts by weight of heavy calcium carbonate, 2 parts by weight of polyamide wax, 2 parts by weight of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 2.5 parts by weight of vinyltriethoxysilane, and 3 parts by weight of 3-aminopropyltriethoxysilane.

[0066] The silane-modified polyether resin is XB502.

[0067] The organofluorosilicone resin 3-glycidoxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane are synthesized in a molar ratio of 0.7:1, and the viscosity of the organofluorosilicone resin is 1 Pa·s.

[0068] The preparation method of this organofluorosilicone resin is as follows:

[0069] At room temperature, 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane were added to a reaction vessel, and 1.5 times the mass of anhydrous ethanol was added to the reaction vessel and stirred for 10 minutes.

[0070] Add 1% by mass of HCl catalyst (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) and 5% by mass of distilled water (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) under stirring, and heat to boiling for reflux reaction for 5 hours.

[0071] After the reaction was complete, the pH of the reaction system was adjusted to 7; ethanol, methanol and unreacted water were removed by distillation at 90°C to obtain the organofluorosilicone resin.

[0072] The weighed silane-modified polyether resin, organofluorosilicone resin, heavy calcium carbonate and nano-activated calcium carbonate filler (pre-baked at 120℃ for 2h), polyamide wax, and bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate were added to the planetary mill feed cylinder and stirred for 25min; the base material was obtained by dispersing and stirring for 120min under a vacuum of 0.09MPa.

[0073] Cooling water is passed through the planetary machine material cylinder to lower the temperature. After the base material temperature drops below 50°C, the vacuum is released, vinyltriethoxysilane is added, and the mixture is stirred for 10 minutes. Then, 3-aminopropyltriethoxysilane is added, and the mixture is stirred for 20 minutes under a vacuum of 0.09 MPa. After the vacuum is released, the material is discharged, thus obtaining the aforementioned anti-fouling and washable silane-modified polyether adhesive.

[0074] Example 5

[0075] This embodiment provides a method for preparing a stain-resistant and washable silane-modified polyether sealant, comprising the following steps:

[0076] Weigh out 36 parts by weight of silane-modified polyether resin, 2.5 parts by weight of organofluorine silicone resin, 32 parts by weight of nano-activated calcium carbonate, 20 parts by weight of heavy calcium carbonate, 2 parts by weight of polyamide wax, 2 parts by weight of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 2.5 parts by weight of vinyltriethoxysilane, and 3 parts by weight of 3-aminopropyltriethoxysilane.

[0077] The silane-modified polyether resin is XB502.

[0078] The organofluorosilicone resin 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane are synthesized in a molar ratio of 0.9:1, and the viscosity of the organofluorosilicone resin is 0.8 Pa·s.

[0079] The preparation method of this organofluorosilicone resin is as follows:

[0080] At room temperature, 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane were added to a reaction vessel, and 1.5 times the mass of anhydrous ethanol was added to the reaction vessel and stirred for 15 minutes.

[0081] Add 1% by mass of HCl catalyst (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) and 5% by mass of distilled water (total mass of 3-glycidyl etheroxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane) under stirring, and heat to boiling for reflux reaction for 4.5 hours.

[0082] After the reaction was complete, the pH of the reaction system was adjusted to 7; ethanol, methanol and unreacted water were removed by distillation at 90°C to obtain the organofluorosilicone resin.

[0083] The weighed silane-modified polyether resin, organofluorosilicone resin, heavy calcium carbonate and nano-activated calcium carbonate filler (pre-baked at 120℃ for 2h), polyamide wax, and bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate were added to the planetary mill feed cylinder and stirred for 25min; the base material was obtained by dispersing and stirring for 120min under a vacuum of 0.09MPa.

[0084] Cooling water is passed through the planetary machine material cylinder to lower the temperature. After the base material temperature drops below 50°C, the vacuum is released, vinyltriethoxysilane is added, and the mixture is stirred for 10 minutes. Then, 3-aminopropyltriethoxysilane is added, and the mixture is stirred for 20 minutes under a vacuum of 0.09 MPa. After the vacuum is released, the material is discharged, thus obtaining the aforementioned anti-fouling and washable silane-modified polyether adhesive.

[0085] Comparative Example 1:

[0086] This comparative example provides a method for preparing a stain-resistant and washable silane-modified polyether sealant. The difference from Example 1 is that no organofluorine silicone resin is added; its mass fraction is added to the silane-modified polyether resin. The rest is the same as in Example 1.

[0087] Comparative Example 2

[0088] This comparative example provides a method for preparing a stain-resistant and washable silane-modified polyether sealant. The difference in Example 1 is that the organofluorosilicone resin is replaced with tridecafluorooctyltriethoxysilane, while the rest is the same as in Example 1.

[0089] Comparative Example 3: A commercially available silane-modified polyether adhesive.

[0090] Comparative Example 4: A commercially available anti-fouling silicone sealant.

[0091] The sealants prepared in the above examples and comparative examples were subjected to the following performance tests:

[0092] Scrub resistance test method: ① Test conditions: room temperature about 25℃, humidity about 60%; ② Scrub tool: standard material cotton cloth; ③ Scrub liquid: Libai dishwashing liquid; ④ Test method: wipe the cured adhesive layer with a cloth soaked in dishwashing liquid diluted with water (mass ratio of the two is 19:1), and wipe 3000 times; ⑤ Evaluation criteria: observe the changes on the surface of the adhesive layer before and after scrubbing, including the peeling of the adhesive layer, color change, unevenness, etc. The test results are shown in Table 1.

[0093] The penetration contamination test of porous substrates was conducted in accordance with the requirements of Appendix A of GB / T 23261-2009. The test results are compared in Table 2.

[0094] Surface dust adsorption test: After applying sealant between two stone pieces, the stones were placed at an angle indoors, and the surface dust adsorption was observed at different times. The test results are shown in Table 3.

[0095] Table 1: Results of the scrub resistance test

[0096]

[0097]

[0098] Table 2: Comparison of Test Results for Penetration Contamination Test

[0099]

[0100] Table 3: Comparison of Surface Dust Adsorption Test Results

[0101]

[0102]

[0103] Note: Adsorption levels are categorized from light to heavy as follows: none, virtually none, slightly present, present, and significantly none.

[0104] The antifouling and scrub-resistant silane-modified polyether sealants prepared in Examples 1-5 and Comparative Examples 1-4 were subjected to performance tests. The experimental results in Table 1 show that the sealants in Examples 1-5, prepared with a high content (over 35%) of silane-modified polyether resin and the addition of organofluorosilicone resin, all exhibit excellent scrub resistance; after 5000 scrubs, no obvious visible changes were observed on the surface. In contrast, Comparative Example 1, prepared without organofluorosilicone resin, and Comparative Example 2, which directly added tridecafluorooctyltriethoxysilane, showed slight discoloration on the surface after 5000 scrubs, and a small amount of adhesive residue adhered to the cloth. This indicates that the organofluorosilicone resin synthesized in this invention participates in the crosslinking and curing reaction, which is beneficial for increasing the crosslinking density. Furthermore, the reduction in surface energy after curing the sealant helps to reduce friction during scrubbing, thereby improving scrub resistance.

[0105] Comparative Example 3, a commercially available silane-modified polyether adhesive, and Comparative Example 4, a commercially available silicone sealant, showed slight visible discoloration on their surfaces after 3000 cycles and 1000 cycles, respectively, and a small amount of adhesive residue was found on the rag.

[0106] This indicates that the antifouling and scrub-resistant silane-modified polyether adhesive prepared by the present invention has significantly better scrub resistance than commercially available sealants.

[0107] As can be seen from the results in Table 2, the sealants prepared in Examples 1-5 without plasticizers have superior anti-pollution performance compared to Comparative Examples 1-4.

[0108] As can be seen from the results in Table 3, Examples 1-5, which added the synthetic organofluorosilicone resin, had better anti-dust adsorption ability compared to Comparative Examples 1-4.

[0109] In summary, the sealant prepared by this invention has the characteristics of being anti-fouling, easy to clean, and resistant to scrubbing, which can keep the sealant surface clean and tidy for a long time, thus helping to create a clean and comfortable living environment for people.

[0110] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0111] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A stain resistant, scrub resistant, silane modified polyether sealant, characterized in that, It is prepared from raw materials containing the following components by weight percentage: Silane-modified polyether resin 35-50% Organofluorosilicone resin 0.5-3% 32-60% of reinforced fillers Thixotropic agent 0.5-2% stabilizer 1-5% Dehydrating agent 0.5-4% Coupling agent 0.5-4%; Wherein, the silane-modified polyether resin is an α-silane-terminated silane-modified polyether resin. The organofluorosilicone resin is prepared by hydrolysis and condensation reaction of 3-glycidoxypropyltrimethoxysilane and tridecafluorooctyltriethoxysilane. The molar ratio of the 3-glycidoxypropyltrimethoxysilane to the tridecafluorooctyltriethoxysilane is 0.7~1.3:

1.

2. The stain resistant, scrub resistant, silane modified polyether sealant of claim 1, wherein, The viscosity range of the organofluorosilicone resin is 0.5 Pa·s to 1 Pa·s.

3. The stain resistant, scrub resistant, silane modified polyether sealant of claim 1, wherein, The preparation method of the organofluorosilicone resin includes the following steps: The 3-glycidyl etheroxypropyltrimethoxysilane and the tridecylfluorooctyltriethoxysilane were stirred and mixed in anhydrous ethanol. During the stirring process, HCl catalyst and distilled water were added, and the mixture was heated to boiling and refluxed for 3 to 5 hours. After the reaction is complete, the pH of the reaction system is adjusted to 6.5~7.5, and the organic fluorosilicone resin is obtained by distillation at 85℃~95℃.

4. The antifouling and scrub-resistant silane-modified polyether sealant as described in any one of claims 1-3, characterized in that, The silane-modified polyether resin is at least one of the following: STP-E10 resin, STP-E30 resin, STP-E35 resin, and STP-XB502 resin produced by Wacker Chemie AG, Germany.

5. The stain-blocking, scrub-resistant, silane-modified polyether sealant of any one of claims 1-3, wherein, The reinforcing filler is at least one of nano-activated calcium carbonate, silica powder, heavy calcium carbonate, talc, and titanium dioxide; and / or, The thixotropic agent is at least one of polyamide wax, hydrogenated castor oil, organobentonite, and fumed silica.

6. The antifouling and scrub-resistant silane-modified polyether sealant according to any one of claims 1-3, characterized in that, The stabilizer is at least one of hindered amine light stabilizers and benzotriazole light stabilizers.

7. The stain resistant, scrub resistant, silane modified polyether sealant of claim 6, wherein, The hindered amine light stabilizer is bis(2,2,6,6-tetramethyl-4-piperidine) sebacate, and the benzotriazole light stabilizer is 2-(5-chloro(2H)-benzotriazole-2-yl)-4-(methyl)-6-(tert-butyl)phenol.

8. The stain-blocking, scrub-resistant, silane-modified polyether sealant of any one of claims 1-3, wherein, The dehydrating agent is a vinyl-functionalized silane.

9. The stain resistant, scrub resistant, silane modified polyether sealant of claim 8, wherein, The dehydrating agent is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, and vinylmethyldimethoxysilane.

10. The stain-blocking, scrub-resistant, silane-modified polyether sealant of any one of claims 1-3, wherein, The coupling agent is an aminosilane coupling agent.

11. The stain resistant, scrub resistant, silane modified polyether sealant of claim 10, wherein, The coupling agent is at least one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

12. A process for the preparation of the anti-fouling, scrub- resistant, silane-modified polyether sealant of any one of claims 1-11, characterized in that, Includes the following steps: The silane-modified polyether resin, reinforcing filler, thixotropic agent, organofluorosilicone resin, and stabilizer are stirred and dispersed under a vacuum of 0.08~0.1MPa for 60min~120min to obtain the base material; Add the dehydrating agent and coupling agent to the base material in sequence and stir for 10 min to 20 min respectively. The resulting anti-fouling and washable silane-modified polyether sealant is then obtained.

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