Liquid silicone rubber composition, coated fabric and preparation method and application thereof

Abstract

The invention provides a liquid silicone rubber composition, a coated fabric and a preparation method and application thereof. The composition adopts pure organic silicon resin to replace fumed silica powder, and comprises the following components in percentage by weight: 20-50% of polysiloxane containing alkenyl at the tail end, 20-50% of organic silicon resin, 2-10% of hydrogen-containing silicone oil, 1-6% of catalyst, 0.5-3% of adhesive, 0.1-2% of inhibitor and 2-4% of optional color paste or stabilizer. The component A and the component B are homogenized and mixed for 2 h under the condition that the temperature is lower than or equal to 50 DEG C, and coating liquid is prepared according to the weight ratio of 10: 1; and after blade coating of 25g / m < 2 >, rapid curing is carried out at 190 DEG C for 1-5 minutes, and the silicone rubber coated fabric which is compact, tear-resistant, weather-resistant, excellent in interface adhesion and soft in hand feeling is prepared. The product is suitable for the fields of synthetic leather, personal protection materials or special conveyor belts.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile coating materials, in particular to a two-component addition type liquid silicone rubber-based textile coating composition, a preparation method and application thereof, and is particularly used for preparing industrial technical fabric surface silicone rubber coating fabric with excellent weather resistance, strong adhesion and soft hand feeling. BACKGROUND

[0002] Industrial technical fabric containing two-component addition type liquid silicone rubber coating has excellent comprehensive performance and is easy to process, and has been widely used in many fields, including synthetic leather, personal protective materials, special conveyor belts, etc.

[0003] In order to obtain better comprehensive performance, two-component addition type liquid silicone rubber often needs to be reinforced with fillers. In some applications, the main reinforcement method is to reinforce with silica powder. However, reinforcing two-component addition type liquid silicone rubber with silica powder can cause "structurization". "Structurization" refers to the three-dimensional network structure formed by the hydrogen bonding between the surface hydroxyl groups (Si-OH) of silica powder and the raw rubber, which causes the viscosity of the system to abnormally increase with time, and even gelation. This phenomenon is common in applications such as coatings, adhesives, and rubbers, and is more obvious in storage or static state. "Structurization" can lead to a decrease in processing performance, including difficulty in stirring and pumping due to abnormal viscosity increase, additional energy consumption or equipment wear and tear; product stability problems, performance differences between batches, and continuous viscosity increase during storage. In more serious cases, the product changes from "shear thinning" to permanent high viscosity, loses thixotropy, and eventually loses construction performance.

[0004] Correspondingly, using resin to reinforce two-component addition type liquid silicone rubber can effectively avoid the occurrence of "structurization", because compared with silica powder which achieves reinforcement through physical action (surface hydroxyl groups Si-OH and -Si-O-Si- in raw rubber are connected by hydrogen bonding / physical adsorption of silica powder on raw rubber, which is difficult to control), resin mainly achieves reinforcement through chemical bonds (reaction between unsaturated groups on the surface of the resin and Si-H in the system, which is relatively easy to control). However, the reinforcing effect of resin on two-component addition type liquid silicone rubber is generally not as good as that of silica powder.

[0005] In addition, in order to meet the adhesion requirements of two-component addition type liquid silicone rubber to the base fabric, resin-reinforced two-component addition type liquid silicone rubber also needs to select a different adhesive from silica powder-reinforced two-component addition type liquid silicone rubber system, which is mainly due to the difference in reinforcement methods of silica powder and resin. SUMMARY

[0006] To overcome the defects of filler agglomeration and structuring caused by the existing silica powder reinforcement, the present application uses pure organic silicone resin as the reinforcing phase, and provides a liquid silicone rubber composition with the following advantages:

[0007] The composition realizes high crosslinking density and excellent mechanical strength based on the synergistic compatibility of terminal alkenyl-containing organopolysiloxane and vinyl MQ resin; the optimized ratio of hydrogen-containing organopolysiloxane and silicon hydride addition catalyst takes into account both rapid curing and low residual metal content; the introduction of silane coupling agent and adhesion promoter into the adhesive system significantly improves the interfacial adhesion of the coating to nylon, polyester or glass fiber based cloth.

[0008] In preparation, the above composition is divided into two components A and B, and is uniformly dispersed at 50°C or below by homogenization or planetary mixing, and then a coating liquid is prepared according to a weight ratio of 10:1, and a dense, tear-resistant, weather-resistant and comfortable coating fabric is formed on the surface of the fabric through a rapid curing process. The coating fabric is widely used in the fields of synthetic leather, personal protective clothing and special conveyor belts, etc.

[0009] According to a first aspect of the present application, a liquid silicone rubber composition for textile coating is provided, comprising, by weight percentage:

[0010]

[0011]

[0012] an adhesive, comprising:

[0013] a silane coupling agent 0.5-3%,

[0014] an adhesion promoter 0.5-3%;

[0015] a reaction inhibitor 0.1-2%;

[0016] wherein the terminal alkenyl-containing organopolysiloxane contains at least two alkenyl groups connected to silicon atoms per molecule;

[0017] the hydrogen-containing organopolysiloxane contains at least two hydrogen atoms connected to silicon atoms per molecule;

[0018] the organic silicone resin is a vinyl MQ resin with a vinyl content of 0.25-0.40 wt%, a hydroxyl content of 1-3 wt%, and an M / Q molar ratio of 0.6-0.8.

[0019] In a preferred embodiment, the liquid silicone rubber composition for textile coating comprises, by weight percentage:

[0020]

[0021] adhesive, comprising:

[0022] a silane coupling agent 0.5-1%,

[0023] an adhesion promoter 0.5-1%,

[0024] a reaction inhibitor 0.1-0.5%.

[0025] In a preferred embodiment, the terminal alkenyl-containing organopolysiloxane is an end-vinyl silicone oil having a viscosity of 20,000-100,000 mPa-s.

[0026] In a preferred embodiment, the vinyl MQ resin is prepared by a tetraethyl orthosilicate method and has a viscosity of 10,000-20,000 mPa-s.

[0027] In a preferred embodiment, the hydrogen-containing organopolysiloxane is a side-chain hydrogen-containing silicone oil having a hydrogen content of 0.5-1%.

[0028] In a preferred embodiment, the hydrosilylation reaction catalyst is Karstedt catalyst at 3,000 ppm.

[0029] In a preferred embodiment, the silane coupling agent is 3-(2,3-epoxypropoxy)propyl trimethoxysilane, and the adhesion promoter is a titanate-based promoter, which is a mixture composed of 50-70% diisobutyl titanate bis(ethyl acetoacetate) and 30-50% 3-isocyanate propyl trimethoxysilane.

[0030] In a preferred embodiment, the reaction inhibitor is 1-alkynyl cyclohexanol.

[0031] In a preferred embodiment, further comprising:

[0032] 2-4% other additives, which include color paste, stabilizer or a combination thereof.

[0033] According to a second aspect of the present application, there is further provided a coated fabric, which is an industrial technical fabric substrate coated with the above-mentioned liquid silicone rubber composition.

[0034] According to a third aspect of the present application, there is further provided a method for preparing the above-mentioned coated fabric, comprising the following steps:

[0035] Based on the final coating formulation of the above-mentioned liquid silicone rubber composition, the A component and the B component are prepared respectively,

[0036] The A component includes the part of the terminal alkenyl-containing organopolysiloxane and the organosilicon resin in the liquid silicone rubber composition, and the entirety of the hydrogen-containing organopolysiloxane, the silane coupling agent and the reaction inhibitor.

[0037] the B component includes the rest of the terminal alkenyl group-containing organopolysiloxane and the silicone resin in the liquid silicone rubber composition, and all of the silicon hydride addition reaction catalyst and the adhesion promoter;

[0038] and the weight percentage of the terminal alkenyl group-containing organopolysiloxane in the A component and the B component is the same as the weight percentage of this component in the final coating;

[0039] The A component and the B component are mixed in a weight ratio of 10:1 to obtain a liquid silicone rubber coating solution;

[0040] The coating solution is coated and cured on the surface of an industrial technical fabric base cloth to obtain the coated fabric.

[0041] According to a fourth aspect of the present application, the above-mentioned coated fabric is also provided for use in synthetic leather, personal protective materials or special conveyor belts.

[0042] The present application has at least the following beneficial effects:

[0043] 1. The present application uses pure silicone resin instead of traditional fumed silica as a reinforcing phase to introduce a coating network, which completely eliminates the structural defects of powder fillers that easily agglomerate under high load, making the coating internal present a uniform and fine three-dimensional crosslinked network, significantly improving the overall density and wear resistance of the coating; at the same time, since the silicone resin itself can participate in network crosslinking, the intermolecular interaction between the silicone resin and the terminal alkenyl group-containing organopolysiloxane is more close, so that the tensile strength and tear strength of the coating are improved compared with the same amount of silica reinforced system.

[0044] 2. The present application can form a highly crosslinked siloxane backbone during the curing process of the composition through the synergistic compatibility of the terminal alkenyl group-containing organopolysiloxane and the vinyl MQ resin, the M unit in the MQ resin acts as a network end group, which effectively limits the chain segment slip and also gives the coating excellent thermal stability and high temperature resistance; and the Q unit provides a multifunctional cross point, which significantly improves the tear resistance and bending fatigue life of the coating.

[0045] 3. The present application balances the curing speed and low residual metal content by optimizing the ratio of hydrogen-containing organopolysiloxane to Karstedt catalyst, which avoids the curing defects and surface yellowing problems caused by high catalyst dosage, and also avoids the residual of unreacted side groups caused by insufficient catalysis, so that the cured coating surface is smooth, bubble-free and pinhole-free.

[0046] 4. The silane coupling agent and adhesion promoter compound system used in the present application forms a chemical bonding layer on the surface of the base fabric fibers through the coupling agent, further covalently crosslinks with the silicone rubber network, and provides a second phase coordination crosslinking at the interface using a titanate-based promoter, greatly improving the interfacial bonding force of the coating and nylon, polyester, and glass fiber base fabric.

[0047] 5. In terms of process implementation, the present application divides the composition into two components A and B, and mixes them evenly at ≤50℃ using a homogenizer or a planetary mixer, ensuring stable dispersion and long-term storage compatibility of each component; the subsequent coating liquid is prepared according to A:B = 10:1, and is rapidly cured at 190℃, the process is simple and easy to operate, and has good operability and on-site application suitability.

[0048] 6. The surface coating of the coated fabric prepared by the present application is dense and uniform, the thickness is controllable, there is no cracking or delamination after wet heat aging treatment, and excellent softness and comfortable fit are maintained, making it suitable for high-performance textile product fields such as synthetic leather, personal protective clothing, and special conveyor belts. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application are described below in a clear and complete manner. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the scope of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0050] Example 1

[0051] In Example 1, first prepare components A and B according to the final coating formulation shown in Table 1.

[0052] Table 1. Proportion of each formulation involved in Example 1

[0053] Component / percent Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 45 45 45 Silicone resin B-1 50.05 22 47.5 Hydride containing silicone oil C-1 3.3 3 Catalyst D-1 22 2 Adhesion promoter E-1 (i) 1.1 1 Adhesion promoter E-1 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total / percent 100 100 100

[0054] Among them, the end-vinyl silicone oil A-1 is an end-vinyl silicone oil with a viscosity of 100000 mPas (25℃); the silicone resin B-1 is an MQ resin with a viscosity of 10000 mPas, a vinyl content of 0.32%, and an M / Q of 0.6; the hydrogen-containing silicone oil C-1 is a side-chain hydrogen-containing silicone oil with a hydrogen content of 0.52%; the catalyst D-1 is a Karstedt catalyst with a concentration of 3000 ppm; the adhesive E-1(i) is 3-(2,3-epoxypropoxy)propyl trimethoxysilane; the adhesive E-1(ii) is a mixture of 50% diisobutyl titanate bis(acetylacetate) ethyl and 50% 3-isocyanate propyl trimethoxysilane heated and mixed at 50℃ for 30min; the reaction inhibitor F-1 is 1-alkynyl cyclohexanol.

[0055] The formulation of A component is: end-vinyl silicone oil A-1 45%, MQ resin B-1 50.05%, hydrogen-containing silicone oil C-1 3.3%, silane coupling agent E-1 (i) 1.1%, reaction inhibitor F-1 0.55%; the formulation of B component is: end-vinyl silicone oil A-1 45%, MQ resin B-1 22%, Karstedt catalyst D-1 22%, adhesion promoter E-1 (ii) 1 1%.

[0056] The A component and B component above are respectively stirred in a homogenizer or planetary mixer at ≤50℃ for 2h until each component is fully and uniformly dispersed, and then respectively packaged for use. When used, the A component and B component are mixed in a mass ratio of 10:1 to obtain a liquid silicone rubber coating solution.

[0057] The liquid silicone rubber coating solution is uniformly applied to the surface of a pre-cut and cleaned nylon 66 base fabric by a blade coating method, and the coating grammage is controlled at 20g / m2. After coating, the fabric is placed in an oven preheated to 190℃ for curing for 80s to realize complete crosslinking of the silicone rubber network, and finally a coated fabric is obtained.

[0058] Example 2

[0059] The preparation process of the coated fabric in this example is basically the same as that of Example 1, and the only difference is that the formulation proportions are prepared according to Table 2.

[0060] Table 2. Formulation proportions involved in Example 2

[0061] Component / percent Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 35 35 35 Silicone resin B-1 60.05 32 57.5 Hydride containing silicone oil C-1 3.3 3 Catalyst D-1 22 2 Adhesion promoter E-1 (i) 1.1 1 Adhesion promoter E-1 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total / percent 100 100 100

[0062] Example 3

[0063] The preparation process of the coated fabric in this example is basically the same as that of Example 1, and the only difference is that the formulation proportions are prepared according to Table 3.

[0064] Table 3. Formulation proportions involved in Example 3

[0065] Component / percent Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 65 65 65 Silicone resin B-1 30.05 2 27.5 Hydride containing silicone oil C-1 3.3 3 Catalyst D-1 22 2 Adhesion promoter E-1 (i) 1.1 1 Adhesion promoter E-1 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total / percent 100 100 100

[0066] Comparative Example 1

[0067] The preparation process of the coated fabric in this comparative example is basically the same as that of Example 1, and the only difference is that the formulation proportions are prepared according to Table 4, and the types of silicone resins are different, specifically, the MQ resin has a viscosity of 13000mPas, a vinyl content of 0.47%, and an M / Q of 0.7.

[0068] Table 4. Formulation proportions involved in Comparative Example 1

[0069] Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 45 45 45 Silicone resin B-2 50.05 22 47.5 Hydride containing silicone oil C-1 3.3 3 Catalyst D-1 22 2 Adhesion promoter E-1 (i) 1.1 1 Adhesion promoter E-1 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total 100 100 100

[0070] Comparative Example 2

[0071] The coating fabric of this comparative example was prepared by the same process as that of Example 1, except that the formulation proportions were prepared according to Table 5, and the types of adhesives were different. Specifically, the adhesive E-2(i) was 3-(2,3-epoxypropoxy) propyl trimethoxysilane, and the adhesive E-2(ii) was 100% tetraisopropyl titanate.

[0072] Table 5. Formulation proportions involved in Comparative Example 2

[0073] Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 45 45 45 Silicone resin B-1 50.05 22 47.5 Hydride containing silicone oil C-1 3.3 3 Catalyst D-1 22 2 Adhesion promoter E-2 (i) 1.1 1 Adhesion promoter E-2 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total 100 100 100

[0074] Comparative Example 3

[0075] The coating fabric of this comparative example was prepared by the same process as that of Example 1, except that the formulation proportions were prepared according to Table 6, and specifically, the proportion of hydrogen-containing silicone oil C-1 exceeded the protection threshold of the present application.

[0076] Table 6. Formulation proportions involved in Comparative Example 3

[0077] Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 47.5 47.5 47.5 Silicone resin B-1 46.45 19.5 44 Hydride containing silicone oil C-1 4.4 4 Catalyst D-1 22 2 Adhesion promoter E-1 (i) 1.1 1 Adhesion promoter E-1 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total 100 100 100

[0078] Comparative Example 4

[0079] The coating fabric of this comparative example was prepared by the same process as that of Example 1, except that the formulation proportions were prepared according to Table 7, and the types of adhesives were different. Specifically, the adhesive E-2(i) was 3-(2,3-epoxypropoxy) propyl trimethoxysilane, and the adhesive E-2(ii) was 100% tetraisopropyl titanate. In addition, the proportion of hydrogen-containing silicone oil C-1 in this comparative example exceeded the protection threshold of the present application.

[0080] Table 7. Formulation proportions involved in Comparative Example 4

[0081] Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 47.5 47.5 47.5 Silicone resin B-1 46.45 19.5 44 Hydride containing silicone oil C-1 4.4 4 Catalyst D-1 22 2 Adhesion promoter E-2 (i) 1.1 1 Adhesion promoter E-2 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total 100 100 100

[0082] Comparative Example 5

[0083] The coating fabric of this comparative example was prepared by the same process as that of Example 1, except that the formulation proportions were prepared according to Table 8, and the types of silicone resins and adhesives were different. Specifically, the silicone resin was MQ resin with a viscosity of 13000 mPas, a vinyl content of 0.47%, and an M / Q of 0.7; the adhesive E-2(i) was 3-(2,3-epoxypropoxy) propyl trimethoxysilane, and the adhesive E-2(ii) was 100% tetraisopropyl titanate. In addition, the proportion of hydrogen-containing silicone oil C-1 in this comparative example exceeded the protection threshold of the present application.

[0084] Table 8. Formulation proportions involved in Comparative Example 5

[0085] Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 47.5 47.5 47.5 Silicone resin B-2 46.45 19.5 44 Hydride containing silicone oil C-1 4.4 4 Catalyst D-1 22 2 Adhesion promoter E-2 (i) 1.1 1 Adhesion promoter E-2 (ii) 11 1 Reaction inhibitor F-1 0.55 0.5 Total Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 Silicone resin B-1 Hydride containing silicone oil C-1 Catalyst D-1 Adhesion promoter E-1 (i) Adhesion promoter E-1 (ii) Reaction inhibitor F-1 Total Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 Silicone resin B-1 Hydride containing silicone oil C-1 Catalyst D-1 Adhesion promoter E-2 (i) Adhesion promoter E-2 (ii) Reaction inhibitor F-1 Total Component Component A Component B Final coating formulation Vinyl terminated silicone oil A-1 Silicone resin B-2 Hydride containing silicone oil C-1 Catalyst D-1 Adhesion promoter E-2 (i) Adhesion promoter E-2 (ii) Reaction inhibitor F-1 Total 100 100 100

[0086] Test method

[0087] According to the experimental method of HG / T 3048-2009 "Determination of the resistance to combined shear flexing and abrasion of rubber or plastic coated fabrics", the MZ-4063 of Jiangsu Mingzhu Experimental Machinery Co., Ltd. was used to experimentally determine the scratch resistance of each coated fabric obtained from Examples 1 to 3 and Comparative Examples 1 to 5 before and after aging (see Table 7). The test conditions for the scratch resistance experiment were performed in the standard atmospheric environment specified in GB / T 6529-2008 (temperature of 20°C, humidity of 65%), and the load was set to 1 Kg.

[0088] The aging experiment was performed in a constant temperature and humidity test chamber, with conditions of temperature of 70°C, humidity of 95%, and time of 408 hours (17 days).

[0089] And according to the test standard of GB-T 529-2008 "Determination of tear strength of vulcanized rubber or thermoplastic rubber (trouser, right angle and crescent shaped specimens)", first, the liquid silicone rubber coating liquid was formed using a CREE-6014H hot press molding equipment in a mold with an inner diameter of 200mm / 200mm / 2mm, under a pressure of 0.5MPa, at 150°C, and cured for 3min. The sample was cut using the cutting knife specified in the GB-T 529-2008 standard, and the tear strength was determined using an INSTRON 6800 universal testing machine according to the test conditions specified in the standard (see Table 8).

[0090] Experimental results

[0091] Table 7. Scratch resistance test results of coated fabrics of each example and comparative example

[0092]

[0093] Note: OK represents that after 4000 cycles of rubbing, the fabric surface has no damage along the light line; Not Good represents that after 4000 cycles of rubbing, the fabric surface has damage along the light line.

[0094] Table 8. Tear test results of coated fabrics of each example and comparative example

[0095]

[0096] In Example 1, the MQ resin recommended by the present application is synergistically compatible with the end-vinyl silicone oil, the hydrogen-containing silicone oil is optimally matched with the Karstedt catalyst, and the silane coupling agent / titanate adhesion promoter complex system. Not only does the silicone rubber coating formed after rapid curing at 190℃ for 80s, but also the peel strength, tear strength and scratch resistance all meet the application standards of industrial technical fabrics. In Comparative Example 1, the silicone resin B-1 is replaced by silicone resin B-2, which leads to the formation of internal micropores in the cured coating and reduces the tensile toughness. In Comparative Example 2, only the adhesion promoter is replaced by a single silane coupling agent, although the coating is dense, the interfacial peel strength decreases significantly. In Comparative Example 3, the total amount of hydrogen-containing silicone oil in the final formulation is increased, which leads to an excessively soft cured network, and the mechanical strength and scratch resistance of the coating are both significantly reduced. In Comparative Example 4, the adhesion promoter is replaced again based on the formulation of Comparative Example 3, and the coating not only lacks mechanical strength, but also further deteriorates the adhesion. In Comparative Example 5, both the silicone resin parameters and the single adhesion promoter are replaced, and the results show that the coating has serious delamination, glaze cracking and significantly substandard aging resistance, fully proving the superiority of the synergistic effect of the technical features of the present application.

[0097] The above-described examples only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A liquid silicone rubber composition for textile coating, characterized in that: The percentages by weight include: Adhesives, including: Silane coupling agent 0.5~3%, Adhesion promoter 0.5-3%; Reaction inhibitor 0.1-2%; The organic silicone resin is a vinyl MQ resin having a vinyl content of 0.25 to 0.40 wt%, a hydroxyl content of 1 to 3 wt%, and an M / Q molar ratio of 0.6 to 0.

8.

2. The liquid silicone rubber composition for textile coating according to claim 1, characterized in that The percentages by weight include: Adhesives, including: Silane coupling agent 0.5~1%, Adhesion promoter 0.5-1%; Reaction inhibitor 0.1~0.5%.

3. The liquid silicone rubber composition for textile coating according to claim 1 or 2, characterized in that: The terminal alkenyl-containing organopolysiloxane is a vinyl-terminated silicone oil with a viscosity of 20,000 to 100,000 mPa·s.

4. The liquid silicone rubber composition for textile coating according to claim 1 or 2, characterized in that: The vinyl MQ resin is prepared by a ethyl orthosilicate method and has a viscosity of 10,000 to 20,000 mPa·s.

5. The liquid silicone rubber composition for textile coating according to claim 1 or 2, characterized in that: The hydrogen-containing organopolysiloxane is a side chain hydrogen-containing silicone oil with a hydrogen content of 0.5-1%.

6. The liquid silicone rubber composition for textile coating according to claim 1 or 2, characterized in that: The hydrosilylation reaction catalyst is 3000 ppm of Karstedt catalyst.

7. The liquid silicone rubber composition for textile coating according to claim 1 or 2, characterized in that: The silane coupling agent is 3-(2,3-epoxypropoxy)propyltrimethoxysilane, and the adhesion promoter is a mixture of 50% to 70% of diisobutyl bis(ethyl acetoacetate) titanate and 30% to 50% of 3-isocyanatepropyltrimethoxysilane.

8. The liquid silicone rubber composition for textile coating according to claim 1 or 2, characterized in that: The reaction inhibitor is 1-alkynylcyclohexanol.

9. The liquid silicone rubber composition for textile coating according to claim 1 or 2, characterized in that: Also includes: 2% to 4% of other additives, wherein the other additives include color paste, stabilizer or a combination thereof.

10. A coated fabric, characterized in that: The coated fabric is obtained by coating the liquid silicone rubber composition according to any one of claims 1 to 9 on the surface of an industrial technical fabric base fabric.

11. A method for preparing the coated fabric according to claim 10, characterized in that: The following steps are involved: Based on the final coating formulation of the liquid silicone rubber composition according to any one of claims 1 to 9, component A and component B are prepared respectively. The component A includes the terminal alkenyl-containing organopolysiloxane and the organosilicon resin in the liquid silicone rubber composition, as well as the hydrogen-containing organopolysiloxane, the silane coupling agent and the reaction inhibitor. The B component includes the rest of the terminal alkenyl-containing organopolysiloxane and the silicone resin in the liquid silicone rubber composition, as well as the hydrosilylation reaction catalyst and the adhesion promoter; The weight percentage of the terminal alkenyl-containing organopolysiloxane in components A and B is the same as the weight percentage of the component in the final coating; Mixing the component A and the component B in a weight ratio of 10:1 to obtain a liquid silicone rubber coating liquid; The coating liquid is coated on the surface of an industrial technical fabric base cloth and solidified to obtain the coated fabric.

12. An application of a coated fabric, characterized in that: Use of the coated fabric according to claim 10 or 11 in synthetic leather, personal protective materials or special conveyor belts.

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