Tire sealant composition

Abstract

This invention relates to tire sealant compositions. A tire sealant composition comprises: a latex emulsion, a surfactant, an antifreeze, a dendritic polymer, and water, and optional components selected from wetting agents and porous particles. This tire sealant composition exhibits excellent high-temperature stability and / or long-term stability.

Description

[0001] This application is a divisional application of parent application number 201880099276.6. The parent application was filed on August 30, 2018; the invention is entitled "Tire Sealant Composition". Technical Field

[0002] This application relates to tire sealant compositions for tire repair, and more particularly, to tire sealant compositions for repairing tire punctures. Background Technology

[0003] A vehicle's tire may be punctured by a hard object on the road, and the punctured tire may roll unsteadily. This situation can lead to traffic accidents and cause personal injury to the vehicle's driver. To avoid this, a liquid sealant composition has been developed. As a temporary emergency method, the liquid sealant composition can be used to repair a punctured tire, allowing the vehicle to continue driving until it reaches a repair shop.

[0004] Currently, liquid sealant compositions on the market can be prepared according to various formulations.

[0005] Besides sealing performance, the stability of liquid sealant compositions is also important, especially in those containing natural latex. Surfactants can be added to liquid sealant compositions to improve their stability. Generally, anionic surfactants added to liquid sealant compositions achieve excellent stabilizing effects, but they can lead to high viscosity of the liquid sealant, especially at low temperatures.

[0006] In this regard, WO2018021239A1 provides: a tire puncture sealant with excellent injection capability, comprising natural rubber latex, synthetic resin emulsion, antifreeze, surfactant, and chelating agent, wherein the chelating agent content is 0.1% by mass or more; and a tire puncture repair kit using the tire puncture sealant. However, currently, further improvements to the stability of the sealant are still needed in such prior art.

[0007] WO2017070837A1 relates to sealants for tire repair, and more particularly, to sealant compositions for repairing tire punctures and methods for preparing the same, wherein a surfactant is used to stabilize the latex. However, further improvements in the stability of sealants are still needed in such prior art.

[0008] US20150166848A1 provides a sealant composition comprising a latex emulsion, nanoporous particles, a surfactant, an antifreeze, a wetting agent, and water, wherein the wetting agent and a pH adjuster stabilize the sealant composition. However, further improvements in the stability of sealants are still needed in such prior art.

[0009] US9126375B2 relates to tire perforation sealant compositions via valves, comprising dissolved and undissolved natural biomaterials, antifreeze, and other rigid particles. While these sealant compositions offer several advantages—environmentally friendly, with negligible settling and long shelf life—further improvements in sealant stability are still needed in such prior art.

[0010] US20150152302A1 relates to a sealant composition comprising 80-95% by weight of a liquid carrier, 0.1-10% by weight of a gel material derived from a water-soluble polymer, 1-10% by weight of a latex emulsion, 0.1-5% by weight of rigid particles, and 0.1-5% by weight of a surfactant, wherein the surfactant is also used to improve the stability and functionality of the sealant composition. However, further improvements to the stability of the sealant composition are still needed in such prior art.

[0011] Although many sealant composition products have been developed, they may cause stability problems when used, especially at high temperatures such as above 70°C, and they may be unstable over a long period of time. Summary of the Invention

[0012] Therefore, one of the objectives of this application is to provide a tire sealant composition to improve the stability of sealant compositions in the prior art.

[0013] Another object of this application is to provide a novel stabilizer for tire sealant compositions.

[0014] The tire sealant composition of this application achieves excellent sealing performance against tire punctures and superior stability at high temperatures. Furthermore, this tire sealant composition is long-term stable. Detailed Implementation

[0015] The technical solution of this application to solve the above-mentioned technical problems is as follows: A tire sealant composition comprising: a latex emulsion, a surfactant, an antifreeze, a dendritic polymer, and water, and optional components selected from wetting agents and porous particles.

[0016] According to the sealant composition of the preceding technical solution, the weight percentage of antifreeze in the sealant composition is in the range of 20% to 95% by weight, preferably 25% to 94% by weight, more preferably 30% to 93% by weight, and most preferably 35% to 92% by weight. For example, the weight percentage of antifreeze in the sealant composition may be 40%, 50%, or 90% by weight.

[0017] According to the sealing composition of the previous technical solution, the antifreeze includes at least one selected from propylene glycol, glycerin, diethylene glycol and 1,3-propanediol.

[0018] According to any of the foregoing technical solutions, the sealant composition contains a latex emulsion in a weight percentage ranging from 0.01 wt% to 20 wt%, preferably from 0.05 wt% to 15 wt%, more preferably from 0.06 wt% to 13 wt%, and most preferably from 0.08 wt% to 12 wt%. For example, the latex emulsion in the sealant composition may be from 1 wt% to 10 wt%, from 1 wt% to 5 wt%, 0.1 wt%, 1 wt%, or 10 wt%.

[0019] According to any of the foregoing technical solutions, the sealant composition wherein the mass ratio of latex emulsion to surfactant in the sealant composition is 1:5 to 3:1.

[0020] According to any of the foregoing technical solutions, the sealant composition contains a dendritic polymer in a weight percentage ranging from 50 ppm to 40,000 ppm, preferably from 60 ppm to 30,000 ppm, and more preferably from 70 ppm to 25,000 ppm. For example, the weight percentage of the dendritic polymer in the sealant composition may be 50 ppm to 40,000 ppm, 100 ppm to 20,000 ppm, 1,000 ppm to 10,000 ppm, 100 ppm, 1,000 ppm, 2,500 ppm, 5,000 ppm, 10,000 ppm, or 20,000 ppm. According to any of the foregoing technical solutions, the sealant composition contains a dendritic polymer comprising at least one of a succinic acid surface, a sodium carboxylate surface, and a primary amine surface.

[0021] According to any of the foregoing technical solutions, the sealant composition contains a surfactant in a weight percentage ranging from 0.1 wt% to 10 wt%, preferably from 0.2 wt% to 8 wt%, more preferably from 0.2 wt% to 7 wt%, and most preferably from 0.2 wt% to 7 wt%. For example, the sealant composition may contain a surfactant in a weight percentage of 0.3 wt%, 1 wt%, 2 wt%, 4 wt%, or 5 wt%.

[0022] According to any of the foregoing technical solutions, the sealant composition contains a wetting agent in a weight percentage range of 0.001 wt% to 10 wt%, preferably 0.005 wt% to 8 wt%, more preferably 0.007 wt% to 7 wt%, and most preferably 0.008 wt% to 6 wt%. For example, the weight percentage of the wetting agent in the sealant composition may be 0.01 wt%, 1 wt%, or 5 wt%.

[0023] According to any of the foregoing technical solutions, the sealing composition, wherein the wetting agent includes at least one of ethanol, propanol, isopropanol, ethyl butyrate, and dimethyl succinate.

[0024] According to the sealant composition of any of the foregoing technical solutions, the porous particles include at least one of zeolite, silica aerogel, mesoporous silica, carbon aerogel, mesoporous carbon, activated carbon, cenosphere, diatomaceous earth, porous metal and organic chelating compound.

[0025] According to any of the foregoing technical solutions, the sealant composition contains porous particles in a weight percentage ranging from 0.001 wt% to 10 wt%, preferably from 0.005 wt% to 8 wt%, more preferably from 0.007 wt% to 7 wt%, and most preferably from 0.008 wt% to 6 wt%. For example, the weight percentage of porous particles in the sealant composition may be 0.01 wt% to 5 wt%, 0.01 wt% to 2 wt%, 0.1 wt% to 2 wt%, 0.5 wt% to 1.5 wt%, 0.01 wt%, 1 wt%, or 5 wt%.

[0026] According to any of the foregoing technical solutions, the sealant composition further comprises an antifreeze additive, and the antifreeze additive comprises inorganic salts and / or organic salts.

[0027] According to any of the foregoing technical solutions, the sealant composition further comprises auxiliary additives, and the auxiliary additives include at least one of anti-corrosion additives, insecticides, pH adjusters, defoamers, preservatives, colorants, and fragrances.

[0028] The technical solutions according to the present invention may include using dendritic polymers as stabilizers for sealant compositions or sealant compositions according to any of the foregoing technical solutions.

[0029] The technical solutions according to the present invention may further include a stabilizer for the sealant composition, said stabilizer comprising a dendritic polymer as defined in the context of this application.

[0030] In the context of this application, the weight percentage of water in the sealant composition is in the range of 0.01 wt% to 90 wt%, preferably 0.1 wt% to 80 wt%, more preferably 1 wt% to 70 wt%, and most preferably 1.2 wt% to 55 wt%. For example, the weight percentage of water in the sealant composition may be 1.5 wt%, 32.5 wt%, 37.5 wt%, 40 wt%, 41 wt%, 41.5 wt%, 41.9 wt%, 42 wt%, 42.4 wt%, 42.5 wt%, 44.5 wt%, 45.5 wt%, 46.2 wt%, or 51.5 wt%.

[0031] In the context of this application, the dendritic polymer can be an ethylenediamine-core (EDA-core) polyamide-amine type dendritic polymer with different generation series and different surface functional groups. The polyamide-amine type dendritic polymer can be at least one of EDA-core G2 having a succinic acid surface, EDA-core G2 having a primary amine surface, and EDA-core G0.5 having a sodium carboxylate surface. The sealant composition can contain a composite dendritic polymer by mixing different types of dendritic polymers together. The composite dendritic polymer can be a mixture of different types of surface functional groups.

[0032] In this application, the weight percentage of the dendritic polymer in the sealant composition can range from 50 ppm to 40,000 ppm, preferably from 60 ppm to 30,000 ppm, and more preferably from 70 ppm to 25,000 ppm. For example, the weight percentage of the dendritic polymer in the sealant composition can be 100 ppm, 1,000 ppm, 2,500 ppm, 5,000 ppm, 10,000 ppm, or 20,000 ppm. In the context of this application, the surfactant can be anionic and / or nonionic surfactants. The nonionic surfactant can be at least one of polyoxyethylene sorbitan monostearate, polyoxyalkylene alkyl ether, polyoxyalkylene alkenyl ether, polyoxyethylene alkylamine, and triethanolamine laurate. The anionic surfactant can be sodium dodecyl sulfate (SDS). Although SDS may increase the viscosity of the sealant composition, it effectively stabilizes the latex emulsion in the sealant composition.

[0033] The sealant composition may comprise a composite surfactant formed by mixing different types of surfactants together, wherein the type of surfactant used to form the composite surfactant may be selected according to the type and amount of latex used in the sealant composition. The composite surfactant may be a mixture of different types of nonionic surfactants, a mixture of at least one nonionic surfactant and at least one anionic surfactant, or a mixture of different types of anionic surfactants.

[0034] In addition, the sealant composition also includes a wetting agent (e.g., an alcohol, ether, or ester) to improve the wettability, viscosity, and spreadability of the sealant composition. The wetting agent reduces the surface tension of the sealant composition, allowing it to spread more easily onto the end face area of ​​the tire. Therefore, the sealant composition effectively seals perforations originating from the tread area of ​​the tire.

[0035] In this application, the wetting agent can be ethanol, propanol, isopropanol, ethyl butyrate, dimethyl succinate, or other chemical materials. These wetting agents have low surface tension, thereby effectively reducing the surface tension of the sealant composition when added to it. In this application, the weight percentage of the wetting agent in the sealant composition ranges from 0.01% to 5%. Clearly, the wetting agent will reduce the contact angle of the sealant composition. Simultaneously, the wetting agent can enhance the antifreeze and stabilizing effects of the sealant composition.

[0036] In the context of this application, it should be understood that the unit "ppm" is based on mass (weight) and can be converted to "weight%" based on a conversion factor of 1 weight% = 10000 ppm. Example

[0037] The present invention will be illustrated with reference to the following embodiments.

[0038] <Preparation of Sealant Composition> The sealant compositions according to the present invention, including the following examples, are prepared by mixing two parts together. The first part, namely part A, contains water / solvent, surfactant, nanoporous particles, antifreeze, wetting agent, and dendritic polymer.

[0039] Part Two, or Part B, contains water / solvent and latex.

[0040] In a typical preparation, part A is added to part B. The pH of the final composition is adjusted to above 8.5 by adding a base (including but not limited to NaOH, KOH, ammonia, and tetramethylammonium hydroxide).

[0041] <Evaluation> The performance of the sealant composition was tested by injecting 300 ml of the prepared sealant composition into an aged 195 / 65 R15 tire through a hose under high pressure, preferably 3-7 bar. A puncture formed on the tire was also created using a spike less than 8 mm in length. The vehicle with the tire was then driven for less than 20 km, and tire leakage was checked by measuring the inner tube pressure every 2-5 km. This allowed the sealing effect of the sealant composition on the tire puncture to be recorded using the aforementioned method. If the decrease in inner tube pressure was less than 0.2 bar, it indicated that the sealant composition successfully sealed the tire puncture, i.e., the sealant composition had good sealing performance. After removing the tire from the vehicle, the tire was kept stationary with the puncture facing upwards. The pressure decrease was measured again after 24 or 48 hours to confirm the sealing performance.

[0042] The shelf life of a sealant composition can be tested using static aging and thermodynamic tests. In the static aging test, the sealant composition is placed in an oven at a temperature above 70°C for more than 40 days, thus evaluating its sealing performance as described above.

[0043] Table 1 below provides test results according to an embodiment of the present invention.

[0044] Examples of the prepared sealant compositions and their evaluation results are shown below.

[0045] Example 1 The sealant composition comprises: 42.4% by weight water, 1% by weight sodium dodecyl sulfate, 4% by weight polyoxyethylene dehydrated sorbitan monostearate, 1% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight glycerin, 1% by weight n-propanol and 0.1% by weight natural latex.

[0046] Example 2 The sealant composition comprises: 32.5% by weight water, 1% by weight sodium dodecyl sulfate, 4% by weight polyoxyethylene dehydrated sorbitan monostearate, 1% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight glycerin, 1% by weight n-propanol and 10% by weight natural latex.

[0047] Example 3 The sealant composition comprises: 41.5% by weight water, 5% by weight polyoxyethylene lauryl ether, 1% by weight mesoporous silica, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with sodium carboxylate surface, 50% by weight diethylene glycol, 1% by weight ethanol and 1% by weight natural latex.

[0048] Example 4 The sealant composition comprises: 46.2% by weight of water, 0.3% by weight of polyoxyethylene lauryl ether, 1% by weight of mesoporous silica, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with sodium carboxylate surface, 50% by weight of diethylene glycol, 1% by weight of ethanol and 1% by weight of natural latex.

[0049] Example 5 The sealant composition comprises: 51.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitan monostearate, 1% by weight carbon aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with a primary amine surface, 40% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0050] Example 6 The sealant composition comprises: 1.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitan monostearate, 1% by weight carbon aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with a primary amine surface, 90% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0051] Example 7 (without wetting agent) The sealant composition comprises: 42.5% by weight water, 5% by weight polyoxyalkylene ether, 1% by weight mesoporous carbon, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight 1,3-propanediol and 1% by weight natural latex.

[0052] Example 8 The sealant composition comprises: 42.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitol monostearate, 1% by weight mesoporous carbon, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight 1,3-propanediol, 0.01% by weight n-propanol and 1% by weight natural latex.

[0053] Example 9 The sealant composition comprises: 37.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitol monostearate, 1% by weight mesoporous carbon, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight 1,3-propanediol, 5% by weight n-propanol and 1% by weight natural latex.

[0054] Example 10 (without nanoporous particles) The sealant composition comprises: 42.5% by weight of water, 5% by weight of polyoxyethylene alkylamine, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with sodium carboxylate surface, 50% by weight of propylene glycol, 1% by weight of ethanol and 1% by weight of natural latex.

[0055] Example 11 The sealant composition comprises: 42.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitan monostearate, 0.01% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with sodium carboxylate surface, 50% by weight propylene glycol, 1% by weight ethanol and 1% by weight natural latex.

[0056] Example 12 The sealant composition comprises: 37.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitan monostearate, 5% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with sodium carboxylate surface, 50% by weight propylene glycol, 1% by weight ethanol and 1% by weight natural latex.

[0057] Example 13 (without nanoporous particles and wetting agent) The sealant composition comprises: 43.5% by weight of water, 5% by weight of polyoxyethylene dehydrated sorbitol monostearate, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with a primary amine surface, 50% by weight of propylene glycol, and 1% by weight of natural latex.

[0058] Example 14 The sealant composition comprises: 42% by weight water, 5% by weight polyoxyethylene coconut oil alkylamine, 1% by weight activated carbon, 100 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0059] Example 15 The sealant composition comprises: 41.9% by weight of water, 5% by weight of polyoxyethylene dehydrated sorbitan monostearate, 1% by weight of activated carbon, 1000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight of propylene glycol, 1% by weight of isopropanol and 1% by weight of natural latex.

[0060] Example 16 The sealant composition comprises: 41.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitol monostearate, 1% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0061] Example 17 The sealant composition comprises: 41% by weight water, 5% by weight triethanolamine laurate, 1% by weight silica aerogel, 10,000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0062] Example 18 The sealant composition comprises: 40% by weight water, 5% by weight triethanolamine laurate, 1% by weight cenospheres, 20,000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0063] Example 19 (Comparative Example: No dendritic polymer, nanoporous particles, or wetting agent) The sealant composition comprises: 44% by weight water, 5% by weight polyoxyethylene dehydrated sorbitan monostearate, 50% by weight propylene glycol and 1% by weight natural latex.

[0064] Example 20 The sealant composition comprises: 41.5% by weight water, 5% by weight polyoxyethylene dehydrated sorbitan monostearate, 1% by weight silica aerogel, 2500 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 2500 ppm of EDA-core G2 polyamide-amine dendritic polymer with sodium carboxylate surface, 50% by weight propylene glycol, 1% by weight isopropanol, and 1% by weight natural latex.

[0065] Example 21 The sealant composition comprises: 42.5% by weight water, 4% by weight polyoxyethylene dehydrated sorbitol monostearate, 1% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0066] Example 22 The sealant composition comprises: 44.5% by weight water, 2% by weight polyoxyethylene dehydrated sorbitan monostearate, 1% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0067] Example 23 The sealant composition comprises: 45.5% by weight water, 1% by weight polyoxyethylene dehydrated sorbitan monostearate, 1% by weight silica aerogel, 5000 ppm of EDA-core G2 polyamide-amine dendritic polymer with succinic acid surface, 50% by weight propylene glycol, 1% by weight isopropanol and 1% by weight natural latex.

[0068] Table 1: Evaluation Results Example Sealing result* 1 ○ 2 ◎ 3 ◎ 4 ○ 5 ◎ 6 ◎ 7 ◎ 8 ◎ 9 ● 10 ◎ 11 ◎ 12 ◎ 13 ○ 14 ◎ 15 ● 16 ● 17 ● 18 ◎ 19 △ 20 ● 21 ● 22 ● 23 ○ *symbol Average sealing performance in three tests during the 70℃ high-temperature test ● On average, the seal is applied during the first / second run. ◎ On average, the seal is applied during the 2nd / 3rd run. ○ On average, it was sealed during the 3rd / 4th run. △ On average, it was sealed during the 4th / 5th run. According to the results shown in Table 1, the sealant composition in Example 19 (Comparative Example) without dendritic polymers exhibited poor sealing performance at high temperatures.

[0069] In contrast, the sealant compositions of Examples 1-18 and 20, which contain dendritic polymers according to the present invention, exhibit superior sealing performance at high temperatures compared to Example 19 (comparative example). This result clearly demonstrates that the dendritic polymer according to the present invention can improve the stability of prior art sealant compositions and proves its usability as a stabilizer for sealant compositions, enabling the sealant compositions of this application to achieve good sealing performance against tire punctures and excellent stability at high temperatures. Furthermore, the results in the examples also clearly demonstrate that the dendritic polymer according to the present invention can be used as a stabilizer for sealant compositions.

[0070] Furthermore, by comparing Examples 16 with Examples 21-22, the inventors found that the use of dendritic polymers can reduce the amount of surfactant used without adversely affecting the sealing performance of the sealant composition at high temperatures. It should be noted that the amount of surfactant in the sealant composition of the present invention can be reduced to 1%, 2%, or 4% by weight, thereby keeping the amount of surfactant as minimal as possible while still maintaining the sealing performance of the sealant composition at high temperatures. This further demonstrates that dendritic polymers can be used as stabilizers to stabilize the sealant composition, and that dendritic polymers can partially replace the surfactant in the sealant composition of the present invention. Accordingly, using dendritic polymers to partially replace surfactants can at least partially solve the problem of high viscosity in liquid sealants caused by the addition of surfactants such as anionic surfactants, especially at low temperatures, because a smaller amount of surfactant is required in the sealant composition of the present invention.

[0071] Most importantly, the sealant composition of this application achieves excellent sealing performance for tire punctures. Furthermore, the sealant composition is long-term stable, easy to use, resistant to spoilage, and has a long shelf life, giving it promising market prospects.

[0072] This application is not limited to the specific embodiments described above. In fact, the specific embodiments described above are intended as examples and not limitations. Many modifications can be made by those skilled in the art based on the inspiration of this application without departing from the subject matter and scope of protection of the claims. All such modifications fall within the scope of protection of this application.

Claims

1. A tire sealant composition comprising: a latex emulsion, a surfactant, an anti-freeze agent, a dendritic polymer, and water, and an optional component selected from the group consisting of a wetting agent and porous particles; wherein, The antifreeze in the sealant composition is 20% to 95% by weight. The sealant composition contains a latex emulsion at a weight percentage of 0.01% to 20% by weight; and the sealant composition contains a dendritic polymer at a weight percentage of 100 ppm to 20,000 ppm. The surfactant in the sealant composition comprises 0.1% to 5% by weight. Furthermore, the sealant composition achieves good sealing performance for tire perforations and excellent stability at temperatures above 70°C.

2. The sealant composition according to claim 1, wherein, The antifreeze in the sealant composition is 25% to 94% by weight, more preferably 30% to 93% by weight, and most preferably 35% to 92% by weight.

3. The sealant composition according to claim 1 or 2, wherein, The antifreeze includes at least one of propylene glycol, glycerin, diethylene glycol, and 1,3-propanediol.

4. The sealant composition according to any one of the preceding claims, wherein, The latex emulsion in the sealant composition is 0.05% to 15% by weight, more preferably 0.06% to 13% by weight, and most preferably 0.08% to 12% by weight.

5. The sealant composition according to any one of the preceding claims, wherein, The mass ratio of latex emulsion to surfactant in the sealant composition is 1:5 to 3:

1.

6. The sealant composition according to any one of the preceding claims, wherein, The dendritic polymer includes at least one of a dendritic polymer having a succinic acid surface, a dendritic polymer having a sodium carboxylate surface, and a dendritic polymer having a primary amine surface.

7. The sealant composition according to any one of the preceding claims, wherein, The surfactant in the sealant composition is 0.2% to 8% by weight, more preferably 0.2% to 7% by weight, and most preferably 0.2% to 7% by weight.

8. The sealant composition according to any one of the preceding claims, wherein, The wetting agent in the sealant composition is 0.001% to 10% by weight, preferably 0.005% to 8% by weight, more preferably 0.007% to 7% by weight, and most preferably 0.008% to 6% by weight.

9. The sealant composition according to any one of the preceding claims, wherein, The wetting agent includes at least one of ethanol, propanol, isopropanol, ethyl butyrate, and dimethyl succinate.

10. The sealant composition according to any one of the preceding claims, wherein, The porous particles include at least one of zeolite, silica aerogel, mesoporous silica, carbon aerogel, mesoporous carbon, activated carbon, cenospheres, diatomaceous earth, porous metals, and organic chelating compounds.

11. The sealant composition according to any one of the preceding claims, wherein, The porous particles in the sealant composition are 0.001% to 10% by weight, preferably 0.005% to 8% by weight, more preferably 0.007% to 7% by weight, and most preferably 0.008% to 6% by weight.

12. The sealant composition according to any one of the preceding claims, wherein, The sealant composition further comprises an antifreeze additive, and the antifreeze additive includes inorganic salts and / or organic salts.

13. The sealant composition according to any one of the preceding claims, wherein, The sealant composition further comprises auxiliary additives, and the auxiliary additives include at least one of the following: anti-corrosion additives, insecticides, pH adjusters, defoamers, preservatives, colorants, and fragrances.