CN-122012011-A - Adhesive for bonding phenyl silicone rubber and metal, and preparation method and application thereof

Abstract

The invention relates to the technical field of adhesives, in particular to an adhesive for bonding phenyl silicone rubber and metal, a preparation method and application thereof, and the adhesive comprises, by weight, 85-100 parts of Bismaleimide (BMI), 85-110 parts of hydrogen-containing phenyl silicone resin, 0.05-0.2 part of latent platinum catalyst, 3-8 parts of composite coupling agent, 5-15 parts of functional filler and 0.5-2 parts of antioxidant. The core formula of the invention is prepared by matching BMI with hydrogen-containing phenyl silicone resin in a specific proportion, combining with the difunctional design of the composite coupling agent, and adapting to the interface bonding requirements of various metals such as steel, copper and the like.

Inventors

• HE XUDONG
• MI JIA
• YANG LIANG
• HUANG JINGJIN
• YANG KEBIN

Assignees

• 四川迈思能新材料科技有限公司

Dates

Publication Date

20260512

Application Date

20260318

Claims (10)

1. 1. The adhesive for bonding the phenyl silicone rubber and the metal is characterized by comprising, by weight, 85-100 parts of bismaleimide, 85-110 parts of hydrogen-containing phenyl silicone resin, 0.05-0.2 part of latent platinum catalyst, 3-8 parts of composite coupling agent, 5-15 parts of functional filler and 0.5-2 parts of antioxidant.
2. 2. The adhesive for bonding a phenyl silicone rubber and a metal according to claim 1, wherein the bismaleimide is bisphenol A diphenyl ether BMI or diphenylmethane BMI; And/or the hydrogen content of the hydrogen-containing phenyl silicone resin is 0.6-1.2wt%, the phenyl content is more than or equal to 35%, and Si-H bonds are uniformly distributed; and/or, the latent platinum catalyst is an encapsulated platinum-vinyl siloxane complex; and/or the composite coupling agent is a difunctional group combined coupling agent; and/or the platinum content of the latent platinum catalyst is 1000-3000 ppm, and the latent platinum catalyst is activated at the normal temperature and above 120 ℃; And/or the functional filler is nano silicon dioxide and aluminum oxide, and the weight ratio is 1:2-1:3.
3. 3. An adhesive for bonding a phenyl silicone rubber to a metal according to claim 2, wherein the difunctional groups of the difunctional group combination coupling agent are directed to the metal and the silicone rubber, respectively.
4. 4. An adhesive for bonding a phenyl silicone rubber to a metal according to claim 3, wherein the metal-targeting functional group is an aminosilane and the silicone rubber-targeting functional group is a vinyl silane or a phenyl silane.
5. 5. The adhesive for bonding phenyl silicone rubber and metal according to claim 4, wherein the weight ratio of the functional group for metal to the functional group for silicone rubber is 1:1-2:1.
6. 6. An adhesive for bonding a phenyl silicone rubber to a metal according to claim 2, wherein the alumina is treated with a titanate coupling agent.
7. 7. The adhesive for bonding a phenyl silicone rubber and a metal according to claim 1, wherein the antioxidant is hindered phenols or phosphites.
8. 8. The method for preparing an adhesive for bonding a phenyl silicone rubber and a metal according to any one of claims 1 to 7, comprising the steps of premixing bismaleimide with a hydrogen-containing phenyl silicone resin; then sequentially adding a latent platinum catalyst, a composite coupling agent, a functional filler and an antioxidant, and stirring; vacuum defoamation to obtain the final product.
9. 9. Use of an adhesive for bonding phenyl silicone rubber to metal according to any of claims 1-7 or an adhesive prepared according to the method of preparing an adhesive for bonding phenyl silicone rubber to metal according to claim 8, characterized by being used for double-interface bonding of phenyl silicone rubber and metal.
10. 10. Use of an adhesive for bonding a phenyl silicone rubber to a metal according to claim 9, characterized in that: the metal is steel or copper.

Description

Adhesive for bonding phenyl silicone rubber and metal, and preparation method and application thereof Technical Field The invention relates to the technical field of adhesives, in particular to an adhesive for bonding phenyl silicone rubber and metal, and a preparation method and application thereof. Background Phenyl silicone rubber is widely used for sealing/insulating parts due to excellent high temperature resistance (200 ℃ for a long time) and weather resistance, but the interfacial adhesion with metals such as steel, copper, aluminum and the like is always an industry pain point: The existing bi-component adhesive is complicated to use, needs to be proportioned on site, and has short pot life after being mixed; the single-component adhesive depends on physical adsorption, has insufficient adhesive force (shearing strength is less than or equal to 2 MPa) to silicon rubber and low temperature-resistant adhesive strength (at 200 ℃ is less than or equal to 1 MPa) to metal; although the traditional modified BMI adhesive is resistant to high temperature, the compatibility of the traditional modified BMI adhesive with silicon rubber is poor, and high bonding strength cannot be realized at the same time; the storage stability is poor, the viscosity is obviously increased after the storage at room temperature for 1 month, and the performance decay is fast. Disclosure of Invention The invention aims to provide an adhesive for bonding phenyl silicone rubber and metal, a preparation method and application thereof, and solves the technical problem that the bonding of the phenyl silicone rubber and metal such as steel, copper and the like is unreliable in the prior art. The invention discloses an adhesive for bonding phenyl silicone rubber and metal, which comprises, by weight, 85-100 parts of Bismaleimide (BMI), 85-110 parts of hydrogen-containing phenyl silicone resin, 0.05-0.2 part of a latent platinum catalyst, 3-8 parts of a composite coupling agent, 5-15 parts of a functional filler and 0.5-2 parts of an antioxidant. Further, the bismaleimide is bisphenol A diphenyl ether BMI or diphenylmethane BMI. Furthermore, the hydrogen-containing phenyl silicone resin contains 0.6-1.2wt% of hydrogen, the phenyl content is more than or equal to 35%, and Si-H bonds are uniformly distributed. Has good compatibility with phenyl silicone rubber. Further, the latent platinum catalyst is an encapsulated platinum-vinyl siloxane complex. Furthermore, the content of platinum in the latent platinum catalyst is 1000-3000 ppm, and the latent platinum catalyst is activated at the normal temperature and above 120 ℃. Further, the composite coupling agent is a difunctional group combination coupling agent. Further, the difunctional groups of the difunctional group combination coupling agent are directed to metal and silicone rubber, respectively. Further, the functional group aiming at the metal is amino silane, and the functional group aiming at the silicon rubber is vinyl silane or phenyl silane. Further, the weight ratio of the functional group aiming at metal to the functional group aiming at silicon rubber is 1:1-2:1. Further, the functional filler is nano silicon dioxide and aluminum oxide, and the weight ratio is 1:2-1:3. Further, the alumina is treated with a titanate coupling agent. Further, the antioxidant is hindered phenols or phosphites. Improving the aging resistance. A process for preparing the adhesive used to adhere phenyl silicone rubber to metal includes such steps as premixing bismaleimide with hydrogen-contained phenyl silicone resin; then sequentially adding a latent platinum catalyst, a composite coupling agent, a functional filler and an antioxidant, and stirring; vacuum defoamation to obtain the final product. Further, sealing and storing are carried out after the preparation. The application of the adhesive for bonding the phenyl silicone rubber and the metal is used for bonding the double interfaces of the phenyl silicone rubber and the metal. Further, the metal is steel or copper. Further, the surface of the bonding piece is pretreated before bonding, then the bonding piece is coated with an adhesive, and the bonding piece is cured after bonding. The application scene comprises high-temperature bonding of the phenyl silicone rubber sealing element in the aerospace engine cabin and the steel bracket/copper wire, high-temperature resistant bonding of the phenyl silicone rubber insulating part in the turbocharger and the steel shell/copper joint, and high-temperature resistant sealing bonding of the phenyl silicone rubber sealing gasket in the industrial furnace and the steel flange/copper connecting element. Compared with the prior art, the invention has the following beneficial effects: 1. the core formula of the invention is prepared by matching BMI with hydrogen-containing phenyl silicone resin in a specific proportion, combining with the difunctional design of the composite coupling agent, and adapting to t