Organic silicon system fabric coating adhesive as well as preparation method and application thereof

Abstract

The invention discloses an organic silicon system fabric coating adhesive as well as a preparation method and application thereof. The fabric coating adhesive comprises a component A and a component B in a mass ratio of 1: (0.8-1.2), the component A comprises base glue, vinyl silicone oil, an adhesion promoter and a catalyst; the component B comprises base rubber, vinyl silicone oil, a cross-linking agent, an inhibitor and a modified coupling agent, wherein the modified coupling agent is a tetraethoxysilane modified 3-glycidyl ether oxypropyl trimethoxy silane coupling agent. The fabric coating adhesive disclosed by the invention has a good adhesion effect on fibers and excellent wear resistance and tear resistance; meanwhile, the material has remarkable advantages in the aspect of damp-heat aging performance, the performance is almost not attenuated after 17-day damp-heat aging, and the long-time use requirement of the safety air bag in a complex environment can be better met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of adhesives, and particularly relates to a silicone system fabric coating adhesive as well as a preparation method and application thereof. BACKGROUND

[0002] As a key device to protect the life safety of drivers and passengers, the reliability of the performance of automobile airbags is crucial. Among the many performance requirements of airbags, the coating plays an indispensable role in ensuring the normal operation of the airbag under various complex environments. Silicone coating has been widely used in the field of airbags due to its unique performance advantages. It can make the airbag withstand the high-temperature and high-pressure gas generated by the initiator, effectively prevent the airbag from tearing or burning, and also provide thermal insulation protection for the initiator, achieve controlled air permeability and help ensure the integrity of the mechanical function. In addition, silicone coating also has a significant effect on improving the air tightness of airbag fabric. In accidents such as rollover, it can prevent the passengers from being thrown out of the car.

[0003] However, in actual use, airbags often face complex and variable environmental conditions, among which the influence of hot and humid environment on the performance of silicone coating is particularly prominent. Under the condition of long-term use in high temperature and high humidity, the existing silicone airbag coating is prone to aging. The specific performance is that the adhesion of the coating decreases, which leads to the weakening of the bonding force between the coating and the airbag fabric, and the coating may fall off during the airbag deployment process, thereby affecting the normal deployment and protection effect of the airbag; at the same time, the mechanical properties of the coating will also deteriorate, such as reduced elasticity and weakened strength, which greatly reduces the performance of the airbag in resisting impact force. In addition, hot and humid aging may also lead to a decrease in the air tightness of the coating, which cannot effectively maintain the air pressure in the airbag, thereby affecting the cushioning protection effect of the airbag on the passengers.

[0004] At present, with the continuous development of the automobile industry, the requirements for the safety performance of automobiles are increasing, and consumers and automobile manufacturers have higher expectations for the reliability and durability of airbags under various environments. At the same time, the service life of automobiles is also being extended, which requires the silicone coating of the airbag to maintain good performance for a longer period of time to ensure that it can provide reliable safety protection for passengers throughout the entire service life of the vehicle. However, the shortcomings of the existing silicone airbag coating in terms of hot and humid aging performance limit its application and development in complex environments, and it is difficult to meet the growing demand for automobile safety.

[0005] Therefore, it is of great practical significance and market demand to develop a silicone airbag coating that can effectively improve the hot and humid aging performance. SUMMARY

[0006] To solve the above technical problems, the present application provides a silicone system fabric coating and a preparation method thereof, which can be used for a long time under high humidity and high temperature conditions without obvious performance degradation on the basis of maintaining good bonding performance and heat resistance.

[0007] The silicone system fabric coating provided by the present application can be applied to automobile safety airbags to improve their reliability and safety, and has a broad market application prospect.

[0008] In the first aspect of the present application, a silicone system fabric coating is provided, which comprises component A and component B, and the component A and component B are formulated into fabric coating in a mass ratio of 1:0.8-1.2, including but not limited to 1:0.8, 1:0.9, 1:1.0, 1:1.1, 1:1.2, etc.

[0009] The component A comprises the following raw materials in parts by weight:

[0010] 30-50 parts of first base glue, including but not limited to 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, etc.

[0011] 30-50 parts of first vinyl silicone oil, including but not limited to 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, etc.

[0012] 0.1-1 part of adhesion promoter, including but not limited to 0.1 part, 0.3 part, 0.5 part, 0.7 part, 0.9 part, 1 part, etc.

[0013] 0.1-1 part of catalyst, including but not limited to 0.1 part, 0.3 part, 0.5 part, 0.7 part, 0.9 part, 1 part, etc.

[0014] The component B comprises the following raw materials in parts by weight:

[0015] 30-50 parts of second base glue, including but not limited to 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, etc.

[0016] 30-50 parts of second vinyl silicone oil, including but not limited to 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, etc.

[0017] 1-10 parts of crosslinking agent, including but not limited to 1 part, 3 parts, 5 parts, 7 parts, 9 parts, 10 parts, etc.

[0018] 1-5 parts of modified coupling agent, including but not limited to 1 part, 2 parts, 3 parts, 4 parts, 5 parts, etc.;

[0019] Inhibitors at doses of 0.1-1 part, including but not limited to 0.1 part, 0.3 part, 0.5 part, 0.7 part, 0.9 part, 1 part, etc.;

[0020] The modified coupling agent is a tetraethyl orthosilicate-modified 3-glycidoxypropyltrimethoxysilane coupling agent.

[0021] In one embodiment, the modified coupling agent is a tetraethyl orthosilicate-modified 3-glycidyl etheroxypropyltrimethoxysilane coupling agent prepared by reacting tetraethyl orthosilicate with 3-glycidyl etheroxypropyltrimethoxysilane under the action of a titanium-containing catalyst.

[0022] Optionally, the mass ratio of the tetraethyl orthosilicate to 3-glycidoxypropyltrimethoxysilane is 1:0.5-0.8, including but not limited to 1:0.5, 1:0.6, 1:0.7, 1:0.8, etc.

[0023] In practical applications, the preparation method of the tetraethyl orthosilicate modified 3-glycidoxypropyltrimethoxysilane coupling agent is not specifically limited in this invention. It can be prepared by any feasible method known in the art. For example, the operation and conditions disclosed in CN119799107A, CN114687246A, etc. can be used for the reaction.

[0024] Specifically, the tetraethyl orthosilicate-modified 3-glycidoxypropyltrimethoxysilane coupling agent can be prepared by the following method:

[0025] Tetraethyl orthosilicate, alcohol, and water are mixed and stirred at 50-80℃ (including but not limited to 50℃, 60℃, 70℃, 80℃, etc.) for 1.5-2.5h (including but not limited to 1.5h, 1.8h, 2.0h, 2.3h, 2.5h, etc.) to form a transparent sol;

[0026] Then, 3-glycidoxypropyltrimethoxysilane and a titanium-containing catalyst are added to the transparent sol, and the temperature is raised to 70-90℃ (including but not limited to 70℃, 75℃, 80℃, 85℃, 90℃, etc.), and the reaction is carried out under nitrogen protection for 5-8 hours (including but not limited to 5 hours, 6 hours, 7 hours, 8 hours, etc.).

[0027] Finally, the alcohol and water were removed by vacuum distillation, and the mixture was cooled to room temperature to obtain tetraethyl orthosilicate-modified 3-glycidoxypropyltrimethoxysilane coupling agent.

[0028] Optionally, the alcohol is selected from at least one of ethanol, isopropanol, n-propanol, methanol, tetrahydrofuran, etc., preferably at least one of ethanol and isopropanol;

[0029] Optionally, the titanium-containing catalyst is selected from at least one of tetrabutyl titanate, tetraisopropyl titanate, and di(acetylacetone)titanium diisopropyl alcohol, preferably at least one of tetrabutyl titanate and tetraisopropyl titanate;

[0030] Optionally, the mass ratio of the tetraethyl orthosilicate to alcohol and water is 1:1.5-2:0.15-0.25, including but not limited to 1:(1.5, 1.6, 1.7, 1.8, 1.9, 2, etc.):(0.15, 0.17, 0.19, 0.21, 0.23, 0.25, etc.);

[0031] Optionally, the amount of the titanium-containing catalyst is 1-3% of the mass of 3-glycidyl etheroxypropyltrimethoxysilane;

[0032] Other procedures, such as removing alcohol by vacuum distillation and cooling to room temperature, are routine operations in the field and are not particularly required by this invention.

[0033] The modified coupling agent described in this invention is tetraethyl orthosilicate-modified 3-glycidoxypropyltrimethoxysilane. After hydrolysis and condensation, tetraethyl orthosilicate Si(OC2H5)4 and 3-glycidoxypropyltrimethoxysilane (CH2O)CH-CH2-O-(CH2)3-Si(OCH3)3 form a final product that is a random copolymer / hybrid network structure containing Q-type units. The core of this structure is a silicon (Si) atom connected to four oxygen (O) atoms via four σ bonds. These four oxygen atoms then connect to other silicon atoms, forming a standard tetrahedral structure with the silicon atom at the center and the four oxygen atoms at the four vertices. It also contains epoxy groups suspended on the network framework. The coupling agent contains hydroxyl groups that have a strong interaction with the fiber substrate, enabling it to form a good bond. At the same time, the Q-type units (and the titanium ester bonds that may be introduced by the catalyst) can significantly improve the crosslinking density without increasing the viscosity of the system and ensuring good workability. In addition, the epoxy groups in the chain segments give it excellent wear and tear resistance, as well as heat resistance and resistance to humid heat aging.

[0034] In one embodiment, both the first base adhesive and the second base adhesive are selected from fumed silica-modified vinyl silicone oil;

[0035] Optionally, the fumed silica-modified vinyl silicone oil has a vinyl content of 0.05-0.3 wt%, including but not limited to 0.05 wt%, 0.1 wt%, 0.15 wt%, 0.2 wt%, 0.25 wt%, 0.3 wt%, etc., preferably 0.08-0.15 wt%.

[0036] Optionally, the fumed silica-modified vinyl silicone oil has a fumed silica content of 20-50 wt%, including but not limited to 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%, 45 wt%, 50 wt%, etc., preferably 30-40%. The first base adhesive and the second base adhesive are not particularly required to be from any particular source and can be ordinary commercially available products. For example, the first base adhesive and the second base adhesive can be Senri 3950, or they can be fumed silica-modified vinyl silicone oil products prepared by referring to existing methods.

[0037] In a preferred embodiment, both the first base adhesive and the second base adhesive are products obtained by mixing vinyl silicone oil and fumed silica using a kneader.

[0038] Specifically, the process of mixing the aforementioned vinyl silicone oil with fumed silica using a kneader is as follows:

[0039] Preheat the vinyl silicone oil to 60-80℃ (including but not limited to 60℃, 65℃, 70℃, 75℃, 80℃, etc.), add it to the kneader, and stir at a low speed of 50-100rpm (including but not limited to 50rpm, 60rpm, 70rpm, 80rpm, 90rpm, 100rpm, etc.) to make the vinyl silicone oil evenly distributed on the stirring paddle and cylinder wall.

[0040] Add fumed silica powder slowly into the kneader in 3-5 portions, stirring for 5-10 minutes after each addition.

[0041] Under vacuum, continue stirring at high speed for 5-8 hours at 80-100℃ (including but not limited to 80℃, 85℃, 90℃, 95℃, 100℃, etc.) and 200-300rpm (including but not limited to 200rpm, 230rpm, 250rpm, 280rpm, 300rpm, etc.), and then cool to room temperature to obtain the final product.

[0042] The vinyl silicone oil is selected from at least one of single-ended vinyl silicone oil, double-ended vinyl silicone oil, side-ended vinyl silicone oil, and end-side vinyl silicone oil.

[0043] Optionally, the viscosity of the vinyl silicone oil at 25°C is 10,000-100,000 cps, including but not limited to 10,000, 30,000, 50,000, 80,000, 100,000, etc., preferably 20,000-60,000 cps; specifically, the viscosity at 10 rpm is tested using a cone viscometer and a 52# rotor at 25°C.

[0044] Optionally, the vinyl content of the vinyl silicone oil is 0.1-1 wt%, including but not limited to 0.1 wt%, 0.3 wt%, 0.5 wt%, 0.8 wt%, 1 wt%, etc., preferably 0.3-0.8 wt%.

[0045] For example, the vinyl silicone oil used is WANICONE SF 61-6000 from Wanhua Chemical.

[0046] The specific surface area of ​​the fumed silica is 50 m². 2 / g or more, including but not limited to 50m 2 / g, 100m 2 / g, 150m 2 / g、200m 2 / g、250m 2 / g、300m 2 / g, etc., preferably 150m 2 / g or more;

[0047] For example, the fumed silica mentioned is one or more of HB-139 and HB-160 from Hubei Huifu.

[0048] In one embodiment, the first vinyl silicone oil and the second vinyl silicone oil are both selected from at least one of single-ended vinyl silicone oil, double-ended vinyl silicone oil, side-ended vinyl silicone oil, and end-side vinyl silicone oil.

[0049] Optionally, the viscosity of the first vinyl silicone oil and the second vinyl silicone oil at 25°C is 10,000-100,000 cps, preferably 20,000-60,000 cps; specifically, the viscosity at 10 rpm is tested using a cone viscometer and a 52# rotor at 25°C.

[0050] Optionally, the vinyl content of the first vinyl silicone oil and the second vinyl silicone oil is 0.1-1 wt%, preferably 0.3-0.8 wt%.

[0051] For example, the first vinyl silicone oil and the second vinyl silicone oil are both selected from at least one of Wanhua Chemical's WANICONESF 61-6000, Runhe's Vi302, and Vi303.

[0052] The first vinyl silicone oil and the second vinyl silicone oil may be the same or different.

[0053] In one embodiment, the crosslinking agent is selected from at least one of single-ended hydrogen-containing silicone oil, double-ended hydrogen-containing silicone oil, side-containing hydrogen-containing silicone oil, and end-side hydrogen-containing silicone oil with a hydrogen content of 0.1-2.0 wt%, including but not limited to 0.1 wt%, 0.5 wt%, 1 wt%, 1.5 wt%, 2 wt%, etc., and preferably at least one of end-containing hydrogen-containing silicone oil and end-side hydrogen-containing silicone oil with a hydrogen content of 0.3-1.5 wt%.

[0054] For example, the crosslinking agent is one or more of Wanhua's WANICONE SD8600 and SD8610.

[0055] In one embodiment, the adhesion promoter is selected from at least one of hydrogen-containing alkoxysilanes, epoxy-containing alkoxysilanes, alkoxysilanes containing methacrylic acid groups, and alkoxysilanes containing acrylic acid groups, preferably at least one of hydrogen-containing alkoxysilanes and epoxy-containing alkoxysilanes.

[0056] For example, the adhesion promoter is at least one of Tianjiang High-Tech's TJ-F-01N and TJ-D-08.

[0057] In one embodiment, the catalyst is a platinum-containing catalyst, preferably, based on the total mass of the catalyst, the Pt content is 0.3-0.5 wt%, including but not limited to 0.3 wt%, 0.35 wt%, 0.4 wt%, 4.5 wt%, 0.5 wt%, etc.;

[0058] For example, the catalyst is at least one of Pt5000 platinum catalyst and Pt3000 platinum catalyst.

[0059] In one embodiment, the inhibitor is selected from at least one of alkynol inhibitors or dimethyl maleate, preferably alkynol.

[0060] In a second aspect of the invention, a method for preparing the organosilicon-based fabric coating adhesive is provided.

[0061] In one embodiment, the method for preparing the silicone-based fabric coating adhesive includes the following steps:

[0062] According to the weight proportions, the first base adhesive, the first vinyl silicone oil, the adhesion promoter, and the catalyst are mixed and stirred evenly to obtain component A;

[0063] According to the weight parts, the second base adhesive, the second vinyl silicone oil, the crosslinking agent, the modified coupling agent, and the inhibitor are mixed and stirred evenly to obtain component B;

[0064] Mix component A and component B at a mass ratio of 1:0.8-1.2 and stir until homogeneous to obtain the silicone-based fabric coating adhesive.

[0065] In a third aspect of the invention, the application of the silicone-based fabric coating adhesive is provided.

[0066] The silicone-based fabric coating adhesive of this invention has good adhesion to fibers and excellent wear and tear resistance; at the same time, it has significant advantages in terms of damp heat aging performance, with almost no performance degradation after 17 days of damp heat aging. It can be used in fields such as airbag coatings, high-performance coated fabrics, functional protective fabrics, anti-slip coatings, and outdoor sportswear, and is especially suitable for use as an automotive airbag coating.

[0067] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows:

[0068] This invention utilizes tetraethyl orthosilicate-modified 3-glycidyl etheroxypropyltrimethoxysilane coupling agent, which possesses a random copolymer network structure and epoxy groups suspended on the network skeleton. It can form good adhesion to fiber substrates and exhibits excellent abrasion and tear resistance, heat resistance, and resistance to humid heat aging. It can maintain good performance over a long period in high humidity and high temperature environments, ensuring that the airbag provides reliable safety protection for occupants throughout the entire service life of the vehicle.

[0069] The organosilicon-based fabric coating adhesive and its preparation method of the present invention have readily available raw materials and simple operation, and have excellent prospects for industrial application. Detailed Implementation

[0070] The present invention will now be described in detail. It should be noted that the endpoints and any values ​​of the ranges disclosed in this specification are not limited to the precise ranges or values; these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0071] To facilitate understanding of this application, preferred embodiments are provided below. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0073] Unless otherwise specified, the reagents, materials and instruments used in the following examples are all conventional reagents, materials and instruments in the art, and can be obtained commercially. The reagents involved can also be synthesized by conventional methods in the art.

[0074] The main raw material sources used in the various embodiments and comparative examples of this invention are as follows:

[0075] Base adhesive 3950: Huizhou Senri Organosilicon Materials Co., Ltd., industrial grade;

[0076] Ethyl tetraethyl orthosilicate KH-204: Nanjing Jingtianwei Chemical Co., Ltd., industrial grade;

[0077] 3-Glycidyl etheroxypropyltrimethoxysilane KH-331: Nanjing Jingtianwei Chemical Co., Ltd., industrial grade;

[0078] Tetrabutyl titanate: Tianchang Tianchen Chemical Additives & Oils Factory, industrial grade;

[0079] Anhydrous ethanol: Aladdin;

[0080] Hydrophobic fumed silica HB-139, Hubei Huifu Nanomaterials Co., Ltd., industrial grade;

[0081] Hydrophobic fumed silica HB-630, Hubei Huifu Nanomaterials Co., Ltd., industrial grade;

[0082] Adhesion accelerator TJ-F-01N: Guangzhou Tianjiang High-Tech Materials Co., Ltd., industrial grade;

[0083] Adhesion accelerator TJ-D-08: Guangzhou Tianjiang High-Tech Materials Co., Ltd., industrial grade;

[0084] Catalyst Pt5000: Aladdin;

[0085] Vinyl silicone oil WANICONE SF 61-6000: Wanhua Chemical Group Co., Ltd., industrial grade;

[0086] Vinyl silicone oil Vi302: Ningbo Runhe High-Tech Materials Technology Co., Ltd., industrial grade;

[0087] Vinyl silicone oil Vi303: Ningbo Runhe High-Tech Materials Technology Co., Ltd., industrial grade;

[0088] Crosslinking agent WANICONE SD 8600: Wanhua Chemical Group Co., Ltd., industrial grade;

[0089] Crosslinking agent WANICONE SD 8610: Wanhua Chemical Group Co., Ltd., industrial grade;

[0090] Inhibitor ETCH: McLean;

[0091] Silane coupling agent KH560, McLean;

[0092] The modified coupling agent was prepared by the following method:

[0093] Place 50g of tetraethyl orthosilicate, 100ml of anhydrous ethanol, and 10ml of deionized water in a reactor and stir at 60°C for 2 hours to form a transparent sol.

[0094] Then, 30g of 3-glycidyl etheroxypropyltrimethoxysilane and 1g of tetrabutyl titanate were added, the temperature was raised to 80℃, and the reaction was carried out for 6 hours under nitrogen protection. Finally, the ethanol was removed by vacuum distillation, and the mixture was naturally cooled to room temperature to obtain the modified coupling agent, which is a tetraethyl orthosilicate-modified 3-glycidyl etheroxypropyltrimethoxysilane coupling agent.

[0095] Base adhesive 1 was prepared using the following method:

[0096] Pour 10 kg of preheated (around 80°C) vinyl silicone oil WANICONE SF 61-6000 into the kneader and start stirring at a low speed of 50 rpm to ensure the silicone oil is evenly distributed on the mixing paddle and cylinder wall. Add 4 kg of gaseous silicone HB-139 slowly to the silicone oil in 4 portions, stirring for 10 minutes after each addition (to avoid powder flying or agglomeration caused by adding all the material at once).

[0097] After all the silica has been added and mixed evenly, heat the kneader at a temperature of around 100°C, a vacuum of -0.08MPa to -0.1MPa, and a stirring speed of 300rpm, and continue kneading for 6 hours. After kneading is complete, stop heating and allow the material to cool down naturally to obtain base colloid 1.

[0098] Base adhesive 2 was prepared using the following method:

[0099] Pour 10 kg of preheated (around 80°C) vinyl silicone oil WANICONE SF 61-6000 into the kneader and start stirring at a low speed of 80 rpm to ensure the silicone oil is evenly distributed on the mixing paddle and cylinder wall. Add 3.5 kg of gaseous silicone HB-160 slowly to the silicone oil in 4 portions, stirring for 10 minutes after each addition (to avoid powder flying or agglomeration caused by adding all the material at once).

[0100] After all the silica has been added and mixed evenly, heat the kneader at a temperature of around 100°C, a vacuum of -0.08MPa to -0.1MPa, and a stirring speed of 260rpm, and continue kneading for 7 hours. After kneading is complete, stop heating and allow the material to cool down naturally to obtain base colloid 2.

[0101] Unless otherwise specified, the numerical unit "parts" in the embodiments of this invention refers to parts by mass.

[0102] The testing methods used in the various embodiments and comparative examples of this invention are as follows:

[0103] (1) Tensile strength and elongation at break: ASTM D412 standard was used to prepare 1 mm thick dumbbell-shaped standard specimens. A universal tensile testing machine was used to measure the elongation at break of the specimens at a tensile rate of 500 mm / min. The results were taken as the average of three tests.

[0104] (2) Fabric bending friction: Using ISO 5981 standard, the fabric coating was cut into standard samples of 5mm*10mm. A shear flexure friction tester was used with a 10N counterweight. The test was performed once every 200 times to determine the number of bending friction cycles of the sample. The result was the average value of the test of 3 samples.

[0105] (3) Fabric tear strength: Using ISO 13937-2 standard, the fabric coating was cut into standard samples of 5mm*20mm. A 10mm long cut was made in the middle of the width. The tear strength of the sample was tested using a universal testing machine. The result was the average value of the test of 3 samples.

[0106] (4) Fabric aging performance: The samples were placed in an environmental chamber with a temperature of 70℃ and humidity of 95% and 105℃ respectively for cyclic aging. After 17 days, the bending friction number and tear strength of the samples were tested.

[0107]

Example 1

[0108] Preparation of fabric coating adhesive:

[0109] According to the weight parts, 45 parts of base adhesive 1, 40 parts of vinyl silicone oil WANICONE SF 61-6000, 0.5 parts of adhesion promoter TJ-F-01N, and 0.5 parts of catalyst Pt5000 are mixed and stirred evenly to obtain component A;

[0110] According to the weight parts, 45 parts of base adhesive 1, 40 parts of vinyl silicone oil WANICONE SF 61-6000, 5 parts of crosslinking agent WANICONE SD 8600, 1 part of modified coupling agent, and 0.3 parts of inhibitor ETCH are mixed and stirred evenly to obtain component B;

[0111] Mix component A and component B at a mass ratio of 1:1 and stir until homogeneous to obtain the silicone fabric coating adhesive.

[0112]

Example 2

[0113] According to the weight parts, 40 parts of base adhesive 1, 20 parts of vinyl silicone oil WANICONE SF 61-6000, 20 parts of vinyl silicone oil Vi303, 0.3 parts of adhesion promoter TJ-F-01N, and 0.5 parts of catalyst Pt5000 are mixed and stirred evenly to obtain component A;

[0114] According to the weight parts, 40 parts of base adhesive 1, 20 parts of vinyl silicone oil WANICONE SF 61-6000, 20 parts of vinyl silicone oil Vi303, 8 parts of crosslinking agent WANICONE SD 8600, 3 parts of modified coupling agent, and 0.5 parts of inhibitor ETCH are mixed and stirred evenly to obtain component B;

[0115] Mix component A and component B at a mass ratio of 1:1 and stir until homogeneous to obtain the silicone fabric coating adhesive.

[0116]

Example 3

[0117] According to the weight parts, 35 parts of base adhesive 3950, 50 parts of vinyl silicone oil Vi303, 0.8 parts of adhesion promoter TJ-D-08, and 0.8 parts of catalyst Pt5000 are mixed and stirred evenly to obtain component A;

[0118] According to the weight parts, 35 parts of base adhesive 3950, 50 parts of vinyl silicone oil Vi303, 8 parts of crosslinking agent WANICONE SD8610, 5 parts of modified coupling agent, and 0.5 parts of inhibitor ETCH are mixed and stirred evenly to obtain component B.

[0119] Mix component A and component B at a mass ratio of 1:1 and stir until homogeneous to obtain the silicone fabric coating adhesive.

[0120]

Example 4

[0121] According to the weight parts, 50 parts of base adhesive 2, 35 parts of vinyl silicone oil Vi302, 0.8 parts of adhesion promoter TJ-D-08, and 0.8 parts of catalyst Pt5000 are mixed and stirred evenly to obtain component A;

[0122] According to the weight parts, 50 parts of base adhesive 2, 35 parts of vinyl silicone oil Vi302, 5 parts of crosslinking agent WANICONE SD 8600, 3 parts of modified coupling agent, and 0.5 parts of inhibitor ETCH are mixed and stirred evenly to obtain component B;

[0123] Mix component A and component B at a mass ratio of 1:1 and stir until homogeneous to obtain the silicone fabric coating adhesive.

[0124] Comparative Example 1

[0125] The silicone-based fabric coating adhesive was prepared according to a formula that was essentially the same as that in Example 1, except that no coupling agent was added.

[0126] Comparative Example 2

[0127] The silicone-based fabric coating adhesive was prepared according to a formula that was basically the same as that in Example 1, except that the coupling agent KH560 was used.

[0128] Comparative Example 3

[0129] The silicone-based fabric coating adhesive was prepared according to a formula that was basically the same as that in Example 1, except for the coupling agent KH331.

[0130] The organosilicon-based fabric coating adhesives prepared in the above embodiments and comparative examples were used to prepare fabric coatings according to the following method:

[0131] Using a coating machine, adjust the blade gap to about 0.3mm, apply the coating, and cure at 180℃ for 2 minutes to obtain a fabric coating.

[0132] The performance test results are shown in Table 1 below:

[0133] Table 1. Performance Test Results

[0134]

[0135] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention.

Claims

1. A silicone-based fabric coating adhesive, characterized in that, It includes component A and component B, which are formulated into a fabric coating adhesive at a mass ratio of 1:0.8-1.2; Component A comprises the following raw materials in parts by weight: 30-50 parts of the first base adhesive First vinyl silicone oil 30-50 parts 0.1-1 part of adhesion accelerator, Catalyst 0.1-1 part; Component B comprises the following raw materials in parts by weight: 30-50 parts of the second base adhesive 30-50 parts of second vinyl silicone oil, 1-10 parts of crosslinking agent 1-5 parts of modified coupling agent, Inhibitor 0.1-1 part; The modified coupling agent is a tetraethyl orthosilicate-modified 3-glycidyl etheroxypropyltrimethoxysilane coupling agent.

2. The organosilicon-based fabric coating adhesive according to claim 1, characterized in that, The modified coupling agent is a tetraethyl orthosilicate-modified 3-glycidyl etheroxypropyltrimethoxysilane coupling agent prepared by reacting tetraethyl orthosilicate with 3-glycidyl etheroxypropyltrimethoxysilane under the action of a titanium-containing catalyst. Optionally, the mass ratio of the tetraethyl orthosilicate to 3-glycidoxypropyltrimethoxysilane is 1:0.5-0.

8.

3. The silicone-based fabric coating adhesive according to claim 1 or 2, characterized in that, The tetraethyl orthosilicate-modified 3-glycidyl etheroxypropyltrimethoxysilane coupling agent was prepared by the following method: Tetraethyl orthosilicate, alcohol, and water are mixed and stirred at 50-80°C for 1.5-2.5 hours to form a transparent sol. Then, 3-glycidoxypropyltrimethoxysilane and a titanium-containing catalyst were added to the transparent sol, and the temperature was raised to 70-90℃. The reaction was carried out for 5-8 hours under nitrogen protection. Finally, the alcohol and water were removed by vacuum distillation, and the mixture was cooled to room temperature to obtain tetraethyl orthosilicate-modified 3-glycidoxypropyltrimethoxysilane coupling agent.

4. The organosilicon-based fabric coating adhesive according to claim 3, characterized in that, The alcohol is selected from at least one of ethanol, isopropanol, n-propanol, methanol, and tetrahydrofuran, preferably at least one of ethanol and isopropanol; and / or The titanium-containing catalyst is selected from at least one of tetrabutyl titanate, tetraisopropyl titanate, and di(acetylacetone)titanium diisopropyl alcohol, preferably at least one of tetrabutyl titanate and tetraisopropyl titanate; and / or The mass ratio of the tetraethyl orthosilicate to alcohol and water is 1:1.5-2:0.15-0.25; and / or The amount of the titanium-containing catalyst is 1-3% of the mass of 3-glycidoxypropyltrimethoxysilane.

5. The silicone-based fabric coating adhesive according to any one of claims 1-4, characterized in that, Both the first base adhesive and the second base adhesive are selected from fumed silica-modified vinyl silicone oil; Optionally, the fumed silica-modified vinyl silicone oil has a vinyl content of 0.05-0.3 wt%, preferably 0.08-0.15 wt%. Optionally, the fumed silica-modified vinyl silicone oil has a fumed silica content of 20-50 wt%, preferably 30-40%.

6. The silicone-based fabric coating adhesive according to any one of claims 1-5, characterized in that, The first and second base adhesives are made of Senri 3950; and / or Both the first base adhesive and the second base adhesive are products obtained by mixing vinyl silicone oil and fumed silica in a kneader.

7. The silicone-based fabric coating adhesive according to claim 6, characterized in that, The process of mixing vinyl silicone oil and fumed silica using a kneader is as follows: Preheat the vinyl silicone oil to 60-80℃, add it to the kneader, and stir at a low speed of 50-100 rpm to make the vinyl silicone oil evenly distributed on the mixing paddle and cylinder wall. Add fumed silica powder slowly into the kneader in 3-5 portions, stirring for 5-10 minutes after each addition. Under vacuum, continue stirring at high speed of 80-100℃ and 200-300rpm for 5-8 hours, then cool to room temperature to obtain the final product; Optionally, the vinyl silicone oil is selected from at least one of single-ended vinyl silicone oil, double-ended vinyl silicone oil, side-ended vinyl silicone oil, and end-side vinyl silicone oil; preferably, the viscosity of the vinyl silicone oil at 25°C is 10,000-100,000 cps, more preferably 20,000-60,000 cps; preferably, the vinyl content of the vinyl silicone oil is 0.1-1 wt%, more preferably 0.3-0.8 wt%; more preferably, the vinyl silicone oil is WANICONE SF 61-6000 from Wanhua Chemical. Optionally, the specific surface area of ​​the fumed silica is 50 m². 2 / g or more, preferably 150m 2 / g or more; preferably, the fumed silica is one or more of HB-139 and HB-160 from Hubei Huifu.

8. The silicone-based fabric coating adhesive according to any one of claims 1-7, characterized in that, Both the first vinyl silicone oil and the second vinyl silicone oil are selected from at least one of single-ended vinyl silicone oil, double-ended vinyl silicone oil, side-ended vinyl silicone oil, and end-side vinyl silicone oil; optionally, the viscosity of the first vinyl silicone oil and the second vinyl silicone oil at 25°C is 10,000-100,000 cps, preferably 20,000-60,000 cps; optionally, the vinyl content of the first vinyl silicone oil and the second vinyl silicone oil is 0.1-1 wt%, preferably 0.3-0.8 wt%. Preferably, both the first vinyl silicone oil and the second vinyl silicone oil are at least one of Wanhua Chemical's WANICONE SF61-6000, Runhe's Vi302, and Vi303; the first vinyl silicone oil and the second vinyl silicone oil may be the same or different; and / or The crosslinking agent is selected from at least one of single-end hydrogen-containing silicone oil, double-end hydrogen-containing silicone oil, side-containing hydrogen-containing silicone oil, and end-side hydrogen-containing silicone oil with a hydrogen content of 0.1-2.0 wt%, preferably at least one of end-containing hydrogen-containing silicone oil and end-side hydrogen-containing silicone oil with a hydrogen content of 0.3-1.5 wt%. Preferably, the crosslinking agent is one or more of Wanhua's WANICONE SD8600 and SD8610; and / or The adhesion promoter is selected from at least one of hydrogen-containing alkoxysilanes, epoxy-containing alkoxysilanes, alkoxysilanes containing methacrylic acid groups, and acrylic acid groups, preferably at least one of hydrogen-containing alkoxysilanes and epoxy-containing alkoxysilanes. Preferably, the adhesion promoter is at least one of Tianjiang High-Tech's TJ-F-01N and TJ-D-08; and / or The catalyst is a platinum-containing catalyst, preferably, the Pt content is 0.3-0.5 wt% based on the total mass of the catalyst; Preferably, the catalyst is at least one of Pt5000 platinum catalyst and Pt3000 platinum catalyst; and / or The inhibitor is selected from at least one of alkynol inhibitors or dimethyl maleate, preferably alkynol.

9. A method for preparing an organosilicon-based fabric coating adhesive according to any one of claims 1-8, characterized in that, Includes the following steps: According to the weight proportions, the first base adhesive, the first vinyl silicone oil, the adhesion promoter, and the catalyst are mixed and stirred evenly to obtain component A; According to the weight parts, the second base adhesive, the second vinyl silicone oil, the crosslinking agent, the modified coupling agent, and the inhibitor are mixed and stirred evenly to obtain component B; Mix component A and component B at a mass ratio of 1:0.8-1.2 and stir until homogeneous to obtain the silicone-based fabric coating adhesive.

10. The application of the silicone-based fabric coating adhesive according to any one of claims 1-8 in the fields of airbag coatings, high-performance coated fabrics, functional protective fabrics, anti-slip coatings, and outdoor sportswear, is particularly suitable for use as an automotive airbag coating.

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