A bonding composition and its preparation method and application

Abstract

The present invention relates to the field of bonding technology, and more particularly to a bonding composition, a preparation method thereof, and applications thereof. The present invention provides a bonding composition, wherein raw materials for preparing the bonding composition include fluororubber, peroxide, and a solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:(70-150):(700-1500). During application, the bonding composition provided by the present invention can bond metal parts to rubber with good corrosion resistance, good solvent resistance, and good media resistance, thereby extending the service life of the bonded assembly in acidic and alkaline environments.

Description

Technical Field

[0001] The present invention relates to the field of bonding technology, and in particular to a bonding composition, a preparation method and an application thereof. Background Art

[0002] During the semiconductor manufacturing process, maintaining a high degree of cleanliness and a vacuum environment is crucial to prevent impurities from affecting product quality. Therefore, the vacuum system plays a crucial role, and the bonded slit valve (BSV) is a key component in ensuring the proper functioning of this system. Specifically, the BSV reliably seals and isolates the vacuum system, preventing the leakage of gases or impurities, thereby ensuring the stability and reliability of the semiconductor manufacturing process. Furthermore, its design takes into account the requirements for ease of operation and maintenance, enabling convenient opening and closing of the valve during daily operation of semiconductor equipment, as well as regular maintenance and servicing. It is important to note that due to the unique characteristics and complexity of semiconductor equipment, the performance and quality requirements for BSVs are extremely high. Therefore, when selecting and using this valve, it is important to fully consider the specific needs of the equipment and the operating environment to ensure the valve's suitability and reliability. BSVs play a vital role in the vacuum system of semiconductor equipment and are a key component in ensuring the smooth operation of the semiconductor manufacturing process. With the increasing diversity and complexity of semiconductor processes, the requirements for BSVs are also becoming increasingly stringent. Critically, higher requirements are placed on the sealing surface and bonding performance. The material also requires excellent corrosion resistance, solvent resistance, and media resistance. The adhesive also places high demands on the sealant. Even if the sealing material has excellent performance, the adhesive itself can become a weak point, thereby reducing the service life of the BSV. Currently available cold-adhesive or hot-vulcanized adhesives are not acid- and alkali-resistant, which affects the service life of the bonded assembly in acidic and alkaline environments.

[0003] Chinese patent publication number CN101611064A discloses a method for bonding a perfluoroelastomer material to a surface, but does not provide a solution for improving the corrosion resistance, solvent resistance, and media resistance of the bonding composition.

[0004] Therefore, providing a bonding composition that is corrosion-resistant, solvent-resistant, and medium-resistant, and can further extend the overall service life of the BSV, is a major technical problem that needs to be solved at present. Summary of the Invention

[0005] The first aspect of the present invention provides a bonding composition, the raw materials for preparing the bonding composition include fluororubber, peroxide, and solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:(70-150):(700-1500).

[0006] In one embodiment, the weight ratio of the peroxide, fluororubber, and solvent is 1:(80-120):(800-1200).

[0007] In a preferred embodiment, the weight ratio of the peroxide, fluororubber, and solvent is 1:100:1000.

[0008] In a preferred embodiment, the fluororubber is perfluororubber, and the manufacturer's model available is Solvay 95HT.

[0009] In one embodiment, the peroxide is selected from one or more combinations of 2,5-bis(tert-butyl)-2,5-dimethylhexane, di-tert-butyl peroxide isopropylbenzene, and bis-2,4-dichlorobenzoyl peroxide.

[0010] In one embodiment, the peroxide is 2,5-bis(tert-butyl)-2,5-dimethylhexane.

[0011] In one embodiment, the solvent is selected from a combination of one or more of electronic fluorine liquid, ethyl acetate, and butyl acetate.

[0012] In one embodiment, the solvent may be ethyl acetate or electronic fluorinated liquid.

[0013] In one embodiment, the solvent is an electronic fluorinated liquid, and the electronic fluorinated liquid is 3M's FC-84.

[0014] A second aspect of the present invention provides a method for preparing a bonding composition, comprising the following steps:

[0015] S1. Dissolve the fluororubber using solvent a to obtain a solution a;

[0016] S2. dissolving the peroxide using solvent b to obtain a solution b;

[0017] S3. Mix solution a and solution b to obtain a bonding composition.

[0018] In one embodiment, the solvent a and the solvent b include electronic fluoride liquid, ethyl acetate and other organic solvents.

[0019] In one embodiment, the bonding composition comprises fluororubber, peroxide, and solvent, and the weight ratio of the peroxide, fluororubber, and solvent is 1:(70-150):(700-1500).

[0020] In one embodiment, the bonding composition comprises fluororubber, peroxide, and solvent, and the weight ratio of the peroxide, fluororubber, and solvent is 1:(80-120):(800-1200).

[0021] In a preferred embodiment, the bonding composition comprises fluororubber, peroxide, and solvent, and the weight ratio of the peroxide, fluororubber, and solvent is 1:100:1000.

[0022] In one embodiment, the dissolution time of the fluororubber using the solvent in S1 is 144-168 hours.

[0023] In one embodiment, the fluororubber used in S1 is in block shape with a size of 2*2*2mm. 3 .

[0024] In one embodiment, the dissolution time of the fluororubber using a solvent in S1 includes but is not limited to 144h, 145h, 146h, 147h, 148h, 149h, 150h, 151h, 152h, 153h, 154h, 155h, 156h, 157h, 158h, 159h, 160h, 161h, 162h, 163h, 164h, 165h, 166h, 167h, and 168h.

[0025] A third aspect of the present invention provides an application of a bonding composition, wherein the bonding composition is applied in the technical field of bonding rubber to metal.

[0026] In one embodiment, the application method comprises the following steps:

[0027] A1. Applying the bonding composition to the surface of the metal part;

[0028] A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization;

[0029] A3. After vulcanization, place at 200-230℃ for 16-20h.

[0030] In one embodiment, the number of times the bonding composition is applied to the surface of the metal part in A1 is greater than 1.

[0031] In one embodiment, in A1, after the bonding composition is coated on the surface of the metal part, the metal part is allowed to stand at 23° C. for 10-15 minutes.

[0032] In one embodiment, the bonding composition is applied to the surface of the metal part three times in A1.

[0033] In order to improve the solvent resistance, medium resistance and corrosion resistance of the bonding composition during application, and to extend the service life of the bonding assembly in acidic and alkaline environments, the inventors found during the experiment that when the weight ratio of peroxide, fluororubber and solvent is 1: (70-150): (700-1500) and the bonding composition is applied to the surface of the metal part three times, the bonding composition can have good solvent resistance, medium resistance and corrosion resistance, and can extend the service life of the bonding assembly in acidic and alkaline environments.

[0034] In one embodiment, in A1, after the bonding composition is applied to the surface of the metal part for the first time, the bonding composition is allowed to stand at 23°C for 10-15 minutes, the bonding composition is applied for the second time, and the bonding composition is allowed to stand at 23°C for 10-15 minutes after the coating; finally, the bonding composition is applied for the third time, and the bonding composition is allowed to stand at 23°C for 10-15 minutes after the coating.

[0035] In one embodiment, the time for the metal part to be left standing at 23°C after the bonding composition is coated on the surface includes but is not limited to 10 min, 10.5 min, 11 min, 11.5 min, 12 min, 12.5 min, 13 min, 13.5 min, 14 min, 14.5 min, and 15 min.

[0036] In one embodiment, after being placed at a temperature of 200-230° C. for 16-20 hours, the bonding strength between the metal part and the rubber in A3 is greater than or equal to 2 MPa.

[0037] In one embodiment, after vulcanization in A3, the temperature at high temperature includes but is not limited to 200°C, 201°C, 202°C, 203°C, 204°C, 205°C, 206°C, 207°C, 208°C, 209°C, 210°C, 211°C, 212°C, 213°C, 214°C, 215°C, 216°C, 217°C, 218°C, 219°C, 220°C, 221°C, 222°C, 223°C, 224°C, 225°C, 226°C, 227°C, 228°C, 229°C, and 230°C.

[0038] In one embodiment, the placement time at a temperature of 200-230° C. in A3 includes but is not limited to 16 h, 16.5 h, 17 h, 17.5 h, 18 h, 18.5 h, 19 h, 19.5 h, and 20 h.

[0039] Beneficial effects

[0040] 1. The bonding composition provided by the present invention can make metal parts and rubber have good corrosion resistance after bonding during application.

[0041] 2. The bonding composition provided by the present invention can make metal parts and rubber have good solvent resistance after bonding during application.

[0042] 3. The bonding composition provided by the present invention can make metal parts and rubber have good medium resistance after bonding during application.

[0043] 4. The bonding composition provided by the present invention can extend the service life of the bonding assembly in acidic and alkaline environments. DETAILED DESCRIPTION

[0044] Example 1

[0045] In a first aspect, this embodiment provides a bonding composition, wherein raw materials for preparing the bonding composition include fluororubber, peroxide, and solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:100:1000.

[0046] The fluororubber is perfluororubber, and the manufacturer's model available for purchase is Solvay 95HT.

[0047] The peroxide is 2,5-bis(tert-butyl)-2,5-dimethylhexane.

[0048] The solvent is ethyl acetate.

[0049] A second aspect of this embodiment provides a method for preparing a bonding composition, comprising the following steps:

[0050] S1. Dissolve the fluororubber using solvent a to obtain a solution a;

[0051] S2. dissolving the peroxide using solvent b to obtain a solution b;

[0052] S3. Mix solution a and solution b to obtain a bonding composition.

[0053] The solvent a is an electronic fluorinated liquid, model 3M FC-84.

[0054] The solvent b is electronic fluorinated liquid, model 3M FC-84.

[0055] The solvent includes solvent a and solvent b, and the specific amount used is calculated based on the ability to completely dissolve the fluororubber and peroxide.

[0056] The weight ratio of peroxide, fluororubber and solvent in the bonding composition is 1:100:1000.

[0057] The dissolution time of the fluororubber using the solvent in S1 is 160 hours.

[0058] The fluororubber used in S1 is in block shape with a size of 2*2*2mm. 3 .

[0059] A third aspect of this embodiment provides an application of a bonding composition, wherein the bonding composition is applied in the technical field of bonding rubber to metal.

[0060] The application method includes the following steps:

[0061] A1. Applying the bonding composition to the surface of the metal part;

[0062] A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization;

[0063] A3. After vulcanization, place at 220℃ for 18 hours.

[0064] In the above-mentioned A1, the bonding composition is applied to the surface of the metal part three times.

[0065] In A1, after the bonding composition is applied to the surface of the metal part for the first time, the bonding composition is allowed to stand at 23°C for 12 minutes, the bonding composition is applied for the second time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating; finally, the bonding composition is applied for the third time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating.

[0066] The amounts of the bonding composition applied for the first time, the second time, and the third time are all the same, wherein the size of the bonding surface is 12.5 mm*25 mm, and the thickness of a single coating is 0.05 mm.

[0067] Example 2

[0068] In a first aspect, this embodiment provides a bonding composition, wherein raw materials for preparing the bonding composition include fluororubber, peroxide, and solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:70:700.

[0069] The fluororubber is perfluororubber, and the manufacturer's model available for purchase is Solvay 95HT.

[0070] The peroxide is 2,5-bis(tert-butyl)-2,5-dimethylhexane.

[0071] The solvent is ethyl acetate.

[0072] A second aspect of this embodiment provides a method for preparing a bonding composition, comprising the following steps:

[0073] S1. Dissolve the fluororubber using solvent a to obtain a solution a;

[0074] S2. dissolving the peroxide using solvent b to obtain a solution b;

[0075] S3. Mix solution a and solution b to obtain a bonding composition.

[0076] The solvent a is an electronic fluorinated liquid, model 3M FC-84.

[0077] The solvent b is electronic fluorinated liquid, model 3M FC-84.

[0078] The solvent includes solvent a and solvent b, and the specific amount used is calculated based on the ability to completely dissolve the fluororubber and peroxide.

[0079] The weight ratio of peroxide, fluororubber and solvent in the bonding composition is 1:70:700.

[0080] The dissolution time of the fluororubber using the solvent in S1 is 144 hours.

[0081] The fluororubber used in S1 is in block shape with a size of 2*2*2mm. 3 .

[0082] A third aspect of this embodiment provides an application of a bonding composition, wherein the bonding composition is applied in the technical field of bonding rubber to metal.

[0083] The application method includes the following steps:

[0084] A1. Applying the bonding composition to the surface of the metal part;

[0085] A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization;

[0086] A3. After vulcanization, place at 200℃ for 20h.

[0087] In the above-mentioned A1, the bonding composition is applied to the surface of the metal part three times.

[0088] In A1, after the bonding composition is applied to the surface of the metal part for the first time, the bonding composition is allowed to stand at 23°C for 10 minutes, the bonding composition is applied for the second time, and the bonding composition is allowed to stand at 23°C for 10 minutes after the coating; finally, the bonding composition is applied for the third time, and the bonding composition is allowed to stand at 23°C for 10 minutes after the coating.

[0089] The amounts of the bonding composition applied for the first time, the second time, and the third time are all the same, wherein the size of the bonding surface is 12.5 mm*25 mm, and the thickness of a single coating is 0.05 mm.

[0090] Example 3

[0091] In a first aspect, this embodiment provides a bonding composition, wherein raw materials for preparing the bonding composition include fluororubber, peroxide, and solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:150:1500.

[0092] The fluororubber is perfluororubber, and the manufacturer's model available for purchase is Solvay 95HT.

[0093] The peroxide is 2,5-bis(tert-butyl)-2,5-dimethylhexane.

[0094] The solvent is ethyl acetate.

[0095] A second aspect of this embodiment provides a method for preparing a bonding composition, comprising the following steps:

[0096] S1. Dissolve the fluororubber using solvent a to obtain a solution a;

[0097] S2. dissolving the peroxide using solvent b to obtain a solution b;

[0098] S3. Mix solution a and solution b to obtain a bonding composition.

[0099] The solvent a is an electronic fluorinated liquid, model 3M FC-84.

[0100] The solvent b is electronic fluorinated liquid, model 3M FC-84.

[0101] The solvent includes solvent a and solvent b, and the specific amount used is calculated based on the ability to completely dissolve the fluororubber and peroxide.

[0102] The weight ratio of peroxide, fluororubber and solvent in the bonding composition is 1:150:1500.

[0103] The dissolution time of the fluororubber using the solvent in S1 is 168 hours.

[0104] The fluororubber used in S1 is in block shape with a size of 2*2*2mm. 3 .

[0105] A third aspect of this embodiment provides an application of a bonding composition, wherein the bonding composition is applied in the technical field of bonding rubber to metal.

[0106] The application method includes the following steps:

[0107] A1. Applying the bonding composition to the surface of the metal part;

[0108] A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization;

[0109] A3. After vulcanization, place at 230℃ for 16 hours.

[0110] In the above-mentioned A1, the bonding composition is applied to the surface of the metal part three times.

[0111] In A1, after the bonding composition is applied to the surface of the metal part for the first time, the bonding composition is allowed to stand at 23°C for 15 minutes, the bonding composition is applied for the second time, and the bonding composition is allowed to stand at 23°C for 15 minutes after the coating; finally, the bonding composition is applied for the third time, and the bonding composition is allowed to stand at 23°C for 15 minutes after the coating.

[0112] The amounts of the bonding composition applied for the first time, the second time, and the third time are all the same, wherein the size of the bonding surface is 12.5 mm*25 mm, and the thickness of a single coating is 0.05 mm.

[0113] Example 4

[0114] In a first aspect, this embodiment provides a bonding composition, wherein raw materials for preparing the bonding composition include fluororubber, peroxide, and solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:100:100.

[0115] The fluororubber is perfluororubber, and the manufacturer's model available for purchase is Solvay 95HT.

[0116] The peroxide is 2,5-bis(tert-butyl)-2,5-dimethylhexane.

[0117] The solvent is ethyl acetate.

[0118] A second aspect of this embodiment provides a method for preparing a bonding composition, comprising the following steps:

[0119] S1. Dissolve the fluororubber using solvent a to obtain a solution a;

[0120] S2. dissolving the peroxide using solvent b to obtain a solution b;

[0121] S3. Mix solution a and solution b to obtain a bonding composition.

[0122] The solvent a is an electronic fluorinated liquid, model 3M FC-84.

[0123] The solvent b is electronic fluorinated liquid, model 3M FC-84.

[0124] The solvent includes solvent a and solvent b, and the specific amount used is calculated based on the ability to completely dissolve the fluororubber and peroxide.

[0125] The weight ratio of peroxide, fluororubber and solvent in the bonding composition is 1:100:100.

[0126] The dissolution time of the fluororubber using the solvent in S1 is 160 hours.

[0127] The fluororubber used in S1 is in block shape with a size of 2*2*2mm. 3 .

[0128] A third aspect of this embodiment provides an application of a bonding composition, wherein the bonding composition is applied in the technical field of bonding rubber to metal.

[0129] The application method includes the following steps:

[0130] A1. Applying the bonding composition to the surface of the metal part;

[0131] A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization;

[0132] A3. After vulcanization, place at 220℃ for 18 hours.

[0133] In the above-mentioned A1, the bonding composition is applied to the surface of the metal part three times.

[0134] In A1, after the bonding composition is applied to the surface of the metal part for the first time, the bonding composition is allowed to stand at 23°C for 12 minutes, the bonding composition is applied for the second time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating; finally, the bonding composition is applied for the third time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating.

[0135] The amounts of the bonding composition applied for the first time, the second time, and the third time are all the same, wherein the size of the bonding surface is 12.5 mm*25 mm, and the thickness of a single coating is 0.05 mm.

[0136] Example 5

[0137] In a first aspect, this embodiment provides a bonding composition, wherein raw materials for preparing the bonding composition include fluororubber, peroxide, and solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:100:500.

[0138] The fluororubber is perfluororubber, and the manufacturer's model available for purchase is Solvay 95HT.

[0139] The peroxide is 2,5-bis(tert-butyl)-2,5-dimethylhexane.

[0140] The solvent is ethyl acetate.

[0141] A second aspect of this embodiment provides a method for preparing a bonding composition, comprising the following steps:

[0142] S1. Dissolve the fluororubber using solvent a to obtain a solution a;

[0143] S2. dissolving the peroxide using solvent b to obtain a solution b;

[0144] S3. Mix solution a and solution b to obtain a bonding composition.

[0145] The solvent a is an electronic fluorinated liquid, model 3M FC-84.

[0146] The solvent b is electronic fluorinated liquid, model 3M FC-84.

[0147] The solvent includes solvent a and solvent b, and the specific amount used is calculated based on the ability to completely dissolve the fluororubber and peroxide.

[0148] The weight ratio of peroxide, fluororubber and solvent in the bonding composition is 1:100:500.

[0149] The dissolution time of the fluororubber using the solvent in S1 is 160 hours.

[0150] The fluororubber used in S1 is in block shape with a size of 2*2*2mm. 3 .

[0151] A third aspect of this embodiment provides an application of a bonding composition, wherein the bonding composition is applied in the technical field of bonding rubber to metal.

[0152] The application method includes the following steps:

[0153] A1. Applying the bonding composition to the surface of the metal part;

[0154] A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization;

[0155] A3. After vulcanization, place at 220℃ for 18 hours.

[0156] In the above-mentioned A1, the bonding composition is applied to the surface of the metal part three times.

[0157] In A1, after the bonding composition is applied to the surface of the metal part for the first time, the bonding composition is allowed to stand at 23°C for 12 minutes, the bonding composition is applied for the second time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating; finally, the bonding composition is applied for the third time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating.

[0158] The amounts of the bonding composition applied for the first time, the second time, and the third time are all the same, wherein the size of the bonding surface is 12.5 mm*25 mm, and the thickness of a single coating is 0.05 mm.

[0159] Example 6

[0160] In a first aspect, this embodiment provides a bonding composition, wherein raw materials for preparing the bonding composition include fluororubber, peroxide, and solvent; the weight ratio of the peroxide, fluororubber, and solvent is 1:100:2000.

[0161] The fluororubber is perfluororubber, and the manufacturer's model available for purchase is Solvay 95HT.

[0162] The peroxide is 2,5-bis(tert-butyl)-2,5-dimethylhexane.

[0163] The solvent is ethyl acetate.

[0164] A second aspect of this embodiment provides a method for preparing a bonding composition, comprising the following steps:

[0165] S1. Dissolve the fluororubber using solvent a to obtain a solution a;

[0166] S2. dissolving the peroxide using solvent b to obtain a solution b;

[0167] S3. Mix solution a and solution b to obtain a bonding composition.

[0168] The solvent a is an electronic fluorinated liquid, model 3M FC-84.

[0169] The solvent b is electronic fluorinated liquid, model 3M FC-84.

[0170] The solvent includes solvent a and solvent b, and the specific amount used is calculated based on the ability to completely dissolve the fluororubber and peroxide.

[0171] The weight ratio of peroxide, fluororubber and solvent in the bonding composition is 1:100:2000.

[0172] The dissolution time of the fluororubber using the solvent in S1 is 160 hours.

[0173] The fluororubber used in S1 is in block shape with a size of 2*2*2mm. 3 .

[0174] A third aspect of this embodiment provides an application of a bonding composition, wherein the bonding composition is applied in the technical field of bonding rubber to metal.

[0175] The application method includes the following steps:

[0176] A1. Applying the bonding composition to the surface of the metal part;

[0177] A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization;

[0178] A3. After vulcanization, place at 220℃ for 18 hours.

[0179] In the above-mentioned A1, the bonding composition is applied to the surface of the metal part three times.

[0180] In A1, after the bonding composition is applied to the surface of the metal part for the first time, the bonding composition is allowed to stand at 23°C for 12 minutes, the bonding composition is applied for the second time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating; finally, the bonding composition is applied for the third time, and the bonding composition is allowed to stand at 23°C for 12 minutes after the coating.

[0181] The amounts of the bonding composition applied for the first time, the second time, and the third time are all the same, wherein the size of the bonding surface is 12.5 mm*25 mm, and the thickness of a single coating is 0.05 mm.

[0182] Example 7

[0183] Example 7 provides a bonding composition and a preparation method thereof. The specific implementation method is the same as Example 1, except that, when the bonding composition in Example 7 is applied, the number of times the bonding composition is coated on the surface of the metal part is 1, the size of the bonding surface is 12.5 mm*25 mm, and the coating thickness is 0.05 mm.

[0184] Example 8

[0185] Example 8 provides a bonding composition and a preparation method thereof. The specific implementation method is the same as Example 1, except that, when the bonding composition in Example 8 is applied, the bonding composition is coated on the surface of the metal part twice, the size of the bonding surface is 12.5 mm*25 mm, and the coating thickness is 0.05 mm.

[0186] Comparative Example 1

[0187] The implementation method of Comparative Example 1 is the same as that of Example 1, except that the bonding composition provided in Example 1 is replaced by commercially available common cold adhesive glue.

[0188] Comparative Example 2

[0189] The implementation of Comparative Example 2 is the same as that of Example 1, except that the bonding composition provided in Example 1 is replaced by a commercially available heat-vulcanized bonding glue.

[0190] The metal parts used in the rubber and metal bonding assemblies in Examples 1-8 and Comparative Examples 1-2 are made of the same material, which can be 5754 aluminum, 6061 aluminum, 304 steel, or 316 steel. During the experiment, the metal parts were made of 316 steel. After sandblasting, the surface of the metal parts was cleaned with acetone, and the roughness of the metal parts was 120.

[0191] The rubber material used in the rubber and metal bonding assembly in Examples 1-8 and Comparative Examples 1-2 is the same, namely, vulcanizable fluororubber.

[0192] Performance Testing

[0193] 1. Adhesion effect test

[0194] The bonding compositions provided in Examples 1-8 were applied to observe their bonding effects. For those that produced bonding effects, the bonding strength was tested. The test results are shown in Table 1.

[0195] Bond strength test method: Determine the bond strength in accordance with GB T 13936-1992, which is a method for determining the tensile shear strength of bonds between vulcanized rubber and metal.

[0196] Table 1

[0197]

[0198]

[0199] 2. Tolerance performance test

[0200] The bonding compositions provided in Examples 1-3 and Comparative Examples 1-2 were used to test their solvent resistance and corrosion resistance. The test results are shown in Table 3.

[0201] Solvent resistance testing method: Immerse a group of three specimens (each example or comparative example counts as one group) in the test liquid, which is then placed in a 60°C constant-temperature water bath. After 24 hours, remove the specimens and dry them. Test the bond strength according to GB T 13936-1992, and calculate the change in chemical resistance bond strength using the following formula.

[0202]

[0203] Where: Δδ——Change rate of adhesive’s chemical resistance strength, %;

[0204] - the arithmetic mean of the strength of the specimens after being placed in air;

[0205] ——The arithmetic mean of the strength of the specimens after immersion in chemical reagents.

[0206] The liquid to be tested is a simulated synthetic diesel lubricating oil, which is composed of 99.5 wt % of dioctyl sebacate and 0.5 wt % of phenothiazine.

[0207] Corrosion resistance test method: Plasma (test method see Table 2 below, temperature 100±5°C, time 60±5 min); after plasma irradiation treatment, the bond strength is tested according to the test method of GB / T 13936-1992, and the change rate of bond strength before and after plasma irradiation is calculated (refer to the change rate of bond strength for chemical resistance).

[0208] Table 2

[0209] gas Pressure / Pa Gas flow rate / sccm Power / W <![CDATA

[02] ]> 2±0.5 80±2 800 / 100 <![CDATA[CF4]]> 5±0.5 80±2 800 / 100

[0210] Table 3

[0211]

[0212]

[0213] For solvent resistance and corrosion resistance, the bond strength change rate before and after immersion in the test liquid, and before and after plasma irradiation is used as the criterion: A: bond strength change rate <1%, B: bond strength change rate (1-10)%; C: bond strength change rate (10-20)%; D: bond strength change rate ≥20%.

[0214] It can be seen from the test data in Table 3 that the bonding composition provided in the present application has good solvent resistance and corrosion resistance when used, and can extend the service life of the bonding assembly in chemical reagent and plasma environments.

Claims

1. A bonding composition, characterized in that The raw materials for its preparation include fluororubber, peroxide and solvent; the weight ratio of the peroxide, fluororubber and solvent is 1: (70-150): (700-1500); The fluororubber is perfluororubber; The peroxide is selected from one or more combinations of 2,5-bis(tert-butyl)-2,5-dimethylhexane, di-tert-butyl peroxide isopropylbenzene, and bis-2,4-dichlorobenzoyl peroxide; The solvent is selected from one or more combinations of electronic fluoride liquid, ethyl acetate, and butyl acetate; The bonding composition is used in the field of rubber and metal bonding technology, and the application method includes the following steps: A1. Applying the bonding composition to the surface of the metal part; A2. The metal part coated with the bonding composition is bonded to the rubber and placed in a vulcanizing device for vulcanization; A3. After vulcanization, place at a temperature of 200-230°C for 16-20h; the number of times the bonding composition is applied to the surface of the metal part in A1 is greater than or equal to 3.

2. A method for preparing the bonding composition according to claim 1, characterized in that: The following steps are involved: S1. Dissolve the fluororubber using solvent a to obtain a solution a; S2. dissolving the peroxide using solvent b to obtain a solution b; S3. Mix solution a and solution b to obtain a bonding composition.

3. The method for preparing the bonding composition according to claim 2, wherein: The bonding composition comprises fluororubber, peroxide and solvent, and the weight ratio of the peroxide, fluororubber and solvent is 1:(70-150):(700-1500).

4. The method for preparing the bonding composition according to claim 2, wherein: The dissolution time of the fluororubber using the solvent in S1 is 144-168 hours.

5. The bonding composition according to claim 1, wherein In the A3, after being placed at a temperature of 200-230° C. for 16-20 hours, the bonding strength between the metal part and the rubber is greater than or equal to 2 MPa.

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