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CN-122011963-A - Adhesive film and preparation method and application thereof

CN122011963ACN 122011963 ACN122011963 ACN 122011963ACN-122011963-A

Abstract

The application provides a glue film, a preparation method and application thereof, and relates to the field of glue films. The adhesive film raw material comprises, by mass, 40-60 parts of nitrile rubber, 30-50 parts of phenolic resin, 1-3 parts of stearic acid, 5-15 parts of vulcanized resin, 6-10 parts of curing agent, 2-5 parts of peroxide, 2-3.5 parts of sulfur, 1-2 parts of first vulcanization accelerator, 1-2 parts of second vulcanization accelerator, 0.5-1.2 parts of third vulcanization accelerator, 3-8 parts of adhesion accelerator, 1-3 parts of plasticizer and 10-20 parts of filler. The adhesive film can synchronously reach a highly sufficient crosslinking state in the whole system (rubber phase, resin phase and toughening phase) at a relatively low temperature of 120-130 ℃, realizes rapid curing at a medium temperature of 120-150 ℃, and simultaneously shows excellent adhesive strength and remarkable impact toughness to a metal substrate.

Inventors

  • WANG PENG
  • LU LANSHUO
  • LIN XUEHAO

Assignees

  • 美信新材料股份有限公司
  • 惠州市美信电子有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (10)

  1. 1. The adhesive film is characterized by comprising the following raw materials in parts by mass: 40-60 parts of nitrile rubber, 30-50 parts of phenolic resin, 1-3 parts of stearic acid, 5-15 parts of vulcanized resin, 6-10 parts of curing agent, 2-5 parts of peroxide, 2-3.5 parts of sulfur, 1-2 parts of first vulcanization accelerator, 1-2 parts of second vulcanization accelerator, 0.5-1.2 parts of third vulcanization accelerator, 3-8 parts of adhesion accelerator, 1-3 parts of plasticizer and 10-20 parts of filler; The first vulcanization accelerator comprises one or more of thiazole accelerators, sulfenamide accelerators and guanidine accelerators; The second vulcanization accelerator comprises a thiuram accelerator; the third vulcanization accelerator comprises a dithiocarbamate accelerator.
  2. 2. The adhesive film according to claim 1, wherein the mass content of acrylonitrile in the nitrile rubber is 24% -30%; And/or, the mooney viscosity of the nitrile rubber is 25-50; and/or the nitrile rubber comprises one or more of nitrile rubber, carboxylated nitrile rubber and hydrogenated nitrile rubber; And/or, the phenolic resin comprises a thermoplastic phenolic resin; and/or the raw materials of the phenolic resin comprise phenolic compounds and formaldehyde, wherein the phenolic compounds comprise one or more of phenol, cresol, resorcinol and m-methylphenol; and/or the phenolic resin has a number average molecular weight of 400-1500g/mol; and/or, the vulcanized resin comprises a liquid carboxyl terminated nitrile rubber; and/or the number average molecular weight of the vulcanized resin is 3000-8000 g/mol; and/or the mass content of carboxyl in the vulcanized resin is 5-12%.
  3. 3. The adhesive film of claim 1, wherein the first vulcanization accelerator comprises one or more of 2, 2-dibenzothiazyl disulfide, 2-mercaptobenzothiazole, N-dicyclohexyl-2-benzothiazole sulfenamide, N-cyclohexyl-2-benzothiazole sulfenamide, N-tert-butyl-2-benzothiazole sulfenamide, N-oxybis (1, 2-ethylene) -2-benzothiazole sulfenamide, diphenyl guanidine, N' -diphenoguanidine; And/or the second vulcanization accelerator comprises one or more of dipentamethylenethiuram tetrasulfide, tetrabenzylthiuram disulfide, tetraisobutylthiuram disulfide, tetramethylthiuram tetrasulfide, bis (1, 5-pentylidene) thiuram disulfide, tetrabutylthiuram monosulfide; And/or the number of the groups of groups, the third vulcanization accelerator comprises zinc dimethyl dithiocarbamate zinc diethyl dithiocarbamate, zinc diisobutyl dithiocarbamate one or more of zinc N-ethylphenyl dithiocarbamate, tellurium diethyl dithiocarbamate and zinc dibenzyl dithiocarbamate.
  4. 4. The adhesive film according to claim 1, wherein the curing agent comprises one or more of hexamethylenetetramine, hexamethoxymethyl melamine, and hexamethylol melamine; and/or the peroxide comprises one or more of dicumyl peroxide, 2, 4-dichloro benzoyl peroxide, 1-bis (tert-butyl peroxy) -3, 5-trimethylcyclohexane; And/or the adhesion promoter comprises a silane coupling agent, wherein the silane coupling agent comprises one or more of bis- (3-triethoxysilylpropyl) -tetrasulfide, bis- (3-triethoxysilylpropyl) -disulfide, vinyltris (2-methoxyethoxy) silane, 3-methacryloxypropyl trimethoxysilane and 3-glycidoxypropyl trimethoxysilane; And/or the filler comprises one or more of zinc oxide, magnesium oxide and white carbon black.
  5. 5. The adhesive film according to claim 1, wherein the adhesive film has a thickness of 90-110 μm.
  6. 6. A method for preparing the adhesive film according to any one of claims 1 to 5, comprising: the raw materials are sequentially mixed, cured and rolled to prepare the composite material.
  7. 7. The method of preparing a film according to claim 6, wherein the kneading comprises: firstly mixing nitrile rubber, phenolic resin, stearic acid, vulcanized resin and plasticizer to obtain a first mixture; Carrying out second mixing on the first mixture, the adhesion promoter and the filler to obtain a second mixture; Carrying out third mixing on the second mixture, sulfur and the first vulcanization accelerator to obtain a third mixture; Carrying out fourth mixing on the third mixture and the second vulcanization accelerator to obtain a fourth mixture; And carrying out fifth mixing on the fourth mixture, the third vulcanization accelerator, the curing agent and the peroxide.
  8. 8. The method for producing a film according to claim 7, wherein the temperature of the first kneading is 60 to 80 ℃; and/or the temperature of the second mixing is 80-110 ℃; and/or the temperature of the third mixing is 80-90 ℃ and the time is 3-6min; and/or the temperature of the fourth mixing is 70-80 ℃ and the time is 3-6min; and/or the temperature of the fifth mixing is 60-75 ℃ and the time is 3-6min.
  9. 9. The application of the adhesive film according to any one of claims 1 to 5 is characterized in that the adhesive film is subjected to hot-pressing pre-pasting to obtain a hot-pressing pre-pasting adhesive film, the hot-pressing pre-pasting adhesive film is arranged on the surface of a substrate to be bonded to obtain a bonded substrate, and the bonded substrate is subjected to hot-pressing bonding and pressure-maintaining cooling.
  10. 10. The use of the adhesive film according to claim 9, wherein the temperature of the hot-pressed pre-paste is 60-80 ℃; and/or the temperature of the hot-press bonding is 120-150 ℃, the pressure is 0.3-0.8 MPa, and the time is 40-120s; And/or the substrate comprises a metal substrate.

Description

Adhesive film and preparation method and application thereof Technical Field The application relates to the field of adhesive films, in particular to an adhesive film, a preparation method and application thereof. Background The adhesive film is one kind of solid film adhesive with polymer adhered matter on its two sides and through applying temperature, pressure, electromagnetic wave and other energy, the two sides are adhered firmly to the adhered matter to form the fixing, connecting and beautiful effect. Phenolic resin is a polymer material obtained by polycondensation reaction of phenolic compounds and aldehyde compounds under specific conditions, and the cured product has wide application in the fields of mould products, adhesives, building materials, special fibers and the like. The phenolic resin used as the adhesive has the characteristics of high bonding strength, good temperature resistance, lower production and manufacturing cost and the like, but also has the problems of poor impact resistance, poor weather resistance, low curing speed and the like. The nitrile rubber is a high molecular elastomer polymer formed by copolymerizing acrylonitrile and butadiene, and because the nitrile groups exist, molecules have higher polarity and strong intermolecular hydrogen bonds, so that the nitrile rubber has excellent solvent resistance and bonding performance, and therefore, the nitrile rubber compounded phenolic resin has stronger complementarity when being used as an adhesive. However, the existing phenolic resin and nitrile rubber compound has the problem of higher curing temperature, the curing temperature of the existing scheme is generally 150 ℃ or above, the temperature exceeds the softening point of a plurality of thermoplastic materials, such as PC, ABS, PU and the like, and the materials can be obviously deformed at the temperature, so that the application of phenolic/nitrile bonding is greatly limited; based on this, there is a need to provide an adhesive film composition to solve the above problems. Disclosure of Invention The application aims to provide a glue film, a preparation method and application thereof, so as to solve the problems. In order to achieve the above object, a first aspect of the present application provides a film, which comprises the following raw materials in parts by mass: 40-60 parts of nitrile rubber, 30-50 parts of phenolic resin, 1-3 parts of stearic acid, 5-15 parts of vulcanized resin, 6-10 parts of curing agent, 2-5 parts of peroxide, 2-3.5 parts of sulfur, 1-2 parts of first vulcanization accelerator, 1-2 parts of second vulcanization accelerator, 0.5-1.2 parts of third vulcanization accelerator, 3-8 parts of adhesion accelerator, 1-3 parts of plasticizer and 10-20 parts of filler; The first vulcanization accelerator comprises one or more of thiazole accelerators, sulfenamide accelerators and guanidine accelerators; The second vulcanization accelerator comprises a thiuram accelerator; the third vulcanization accelerator comprises a dithiocarbamate accelerator. Optionally, the mass content of acrylonitrile in the nitrile rubber is 24% -30%; And/or, the mooney viscosity of the nitrile rubber is 25-50; and/or the nitrile rubber comprises one or more of nitrile rubber, carboxylated nitrile rubber and hydrogenated nitrile rubber; And/or, the phenolic resin comprises a thermoplastic phenolic resin; and/or the raw materials of the phenolic resin comprise phenolic compounds and formaldehyde, wherein the phenolic compounds comprise one or more of phenol, cresol, resorcinol and m-methylphenol; and/or the phenolic resin has a number average molecular weight of 400-1500g/mol; and/or, the vulcanized resin comprises a liquid carboxyl terminated nitrile rubber; and/or the number average molecular weight of the vulcanized resin is 3000-8000 g/mol; and/or the mass content of carboxyl in the vulcanized resin is 5-12%. Optionally, the first vulcanization accelerator comprises one or more of 2, 2-dibenzothiazyl disulfide, 2-mercaptobenzothiazole, N-dicyclohexyl-2-benzothiazole sulfenamide, N-cyclohexyl-2-benzothiazole sulfenamide, N-tert-butyl-2-benzothiazole sulfenamide, N-oxybis (1, 2-ethylene) -2-benzothiazole sulfenamide, diphenylguanidine, N' -diorthogonal guanidine; And/or the second vulcanization accelerator comprises one or more of dipentamethylenethiuram tetrasulfide, tetrabenzylthiuram disulfide, tetraisobutylthiuram disulfide, tetramethylthiuram tetrasulfide, bis (1, 5-pentylidene) thiuram disulfide, tetrabutylthiuram monosulfide; And/or the number of the groups of groups, the third vulcanization accelerator comprises zinc dimethyl dithiocarbamate zinc diethyl dithiocarbamate, zinc diisobutyl dithiocarbamate one or more of zinc N-ethylphenyl dithiocarbamate, tellurium diethyl dithiocarbamate and zinc dibenzyl dithiocarbamate. Optionally, the curing agent comprises one or more of hexamethylenetetramine, hexamethoxymethyl melamine and hexamethylol melamine; and/or the per