CN113388339A - Expansion type structure adhesive tape for automobile and rail transit and preparation method thereof - Google Patents

Expansion type structure adhesive tape for automobile and rail transit and preparation method thereof Download PDF

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Publication number
CN113388339A
CN113388339A CN202110687172.0A CN202110687172A CN113388339A CN 113388339 A CN113388339 A CN 113388339A CN 202110687172 A CN202110687172 A CN 202110687172A CN 113388339 A CN113388339 A CN 113388339A
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epoxy resin
mixed
foaming
rail transit
adhesive tape
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谢宇
刘肇闻
何园明
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Haicheng New Materials Wuhu Co Ltd
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Haicheng New Materials Wuhu Co Ltd
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Priority to CN202110687172.0A priority Critical patent/CN113388339A/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses an expansion type structure adhesive tape for automobiles and rail transit and a preparation method thereof, wherein the adhesive tape comprises an adhesive film and an adhesive layer, wherein the adhesive layer is formed by mixing 30-60% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming accelerant, curing agent, accelerant and pigment according to the proportion of 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6%; the structural adhesive tape prepared by the invention has high foaming rate of the adhesive layer, has higher bonding strength with a metal plate, is beneficial to reducing the weight of an automobile and a rail vehicle, saving energy, reducing cost, enhancing the integral rigidity, static rigidity and durability of the automobile and the rail vehicle, improving the sound insulation and noise reduction capability of the automobile and the rail vehicle, can be directly attached to an object to be bonded for use, does not need manual film tearing operation, and is beneficial to automatic and intelligent production.

Description

Expansion type structure adhesive tape for automobile and rail transit and preparation method thereof
Technical Field
The invention relates to the technical field of structural adhesive tapes, in particular to an expansion type structural adhesive tape for automobile and rail transit and a preparation method thereof.
Background
Due to scarcity of petroleum resources and limitation of battery endurance, energy conservation, environmental protection and reduction of cost by reducing dead weight are currently urgent targets to be realized in the fields of automobiles and rail transportation. Meanwhile, with the improvement of the requirements on running safety and comfort, the method of adhesive bonding is necessary to improve the rigidity and durability of the automobile body and improve the noise, vibration and harshness (NVH) of the automobile;
the existing acrylate adhesive has better ultraviolet light and aging resistance, but has lower bonding strength and limited application range, is usually used outside a vehicle body, and a polyurethane adhesive usually needs to be prepared into two components to realize higher bonding strength, has a complex formula and is inconvenient to construct.
Disclosure of Invention
The invention aims to provide an expansion type structural adhesive tape for automobiles and rail transit and a preparation method thereof, wherein the expansion type structural adhesive tape for automobiles and rail transit and the preparation method thereof have the advantages that the foaming rate of an adhesive layer is high, the structural adhesive tape has high bonding strength with a metal plate, the self weight of automobiles and rail transit is favorably reduced, the energy is saved, the cost is reduced, the integral rigidity, the static rigidity and the durability of the automobiles and rail transit are enhanced, the sound insulation and noise reduction capability of the automobiles and rail transit is improved, meanwhile, the expansion type structural adhesive tape can be directly attached to an adhered object for use, manual film tearing operation is not needed, and the automatic and intelligent production is favorably realized.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme: the adhesive layer is formed by mixing mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming accelerant, curing agent, accelerant and pigment, wherein the mixing ratio of the mixed epoxy resin, the reinforcing fiber, the inorganic filler, the modified epoxy resin, the foaming agent, the foaming accelerant, the curing agent, the accelerant and the pigment is 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6%.
The further improvement lies in that: the composite material is prepared by mixing 64.5%, 1%, 22.5%, 3%, 1%, 3%, 5%, 1% and 0.5% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment.
The further improvement lies in that: the mixed epoxy resin is prepared by mixing liquid epoxy resin, solid epoxy resin and solid rubber, wherein the proportion of the liquid epoxy resin, the solid epoxy resin and the solid rubber is 18-25%, 25-30% and 4-17%.
The further improvement lies in that: the inorganic filler is calcium carbonate, the foaming agent is azodicarbonamide, the foaming accelerant is zinc oxide, and the reinforcing fiber is one of aramid fiber, polyester fiber, nylon fiber and asbestos fiber.
The further improvement lies in that: the curing agent is one of N-aminoethyl piperazine, diethylenetriamine, m-xylylenediamine and dicyandiamide, and the accelerator is one of a fatty amine accelerator, an anhydride accelerator, a polyether amine catalyst and a latent catalyst.
A preparation method of an expansion type structure adhesive tape for automobile and rail transit is characterized by comprising the following steps:
step one, preparing mixed epoxy resin, namely adding liquid epoxy resin, solid epoxy resin and solid rubber into a kneading machine to be kneaded until the liquid epoxy resin, the solid epoxy resin and the solid rubber are uniformly melted to prepare mixed epoxy resin, and then adding inorganic filler into the mixed epoxy resin to be continuously kneaded uniformly to obtain a mixture A;
step two, adding the reinforced fibers, the modified epoxy resin, the foaming agent and the foaming accelerant into the mixture A in the step one, continuously kneading until the mixture is uniformly mixed, then adding the curing agent, the accelerant and the pigment, continuously kneading until the mixture is uniformly mixed, and obtaining a mixture B;
adding the mixture B into an internal mixer for mixing, adding the mixed material into extrusion molding equipment, and preparing the structural adhesive tape adhesive layer with the required size by using an extrusion molding machine;
and step four, attaching a low-melting-point high-temperature adhesive film with adhesive property to the surface of the adhesive layer prepared in the step three to obtain a complete product.
The further improvement lies in that: preheating is needed in advance before materials are added into the kneader in the first step and mixed, the materials are kept after being heated to 85 ℃, and the temperature of the kneader is kept between 80 and 90 ℃ during mixing in the second step.
The invention has the beneficial effects that: the structural adhesive tape prepared by the invention has high foaming rate of the adhesive layer, has higher bonding strength with a metal plate, is beneficial to reducing the weight of an automobile and a rail vehicle, saving energy, reducing cost, enhancing the integral rigidity, static rigidity and durability of the automobile and the rail vehicle, improving the sound insulation and noise reduction capability of the automobile and the rail vehicle, can be directly attached to an object to be bonded for use, does not need manual film tearing operation, and is beneficial to automatic and intelligent production.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example 1
According to the figure 1, the embodiment provides an intumescent structure adhesive tape for automobiles and rail transit and a preparation method thereof, and the intumescent structure adhesive tape comprises an adhesive film and an adhesive layer, wherein the adhesive layer is formed by mixing 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6% of mixed epoxy resin, reinforcing fibers, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment in percentage by weight.
The composite material is prepared by mixing 64.5%, 1%, 22.5%, 3%, 1%, 3%, 5%, 1% and 0.5% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment.
The mixed epoxy resin is prepared by mixing liquid epoxy resin, solid epoxy resin and solid rubber, wherein the ratio of the liquid epoxy resin to the solid rubber is 19.5%, 28% and 17%.
The inorganic filler is calcium carbonate, the foaming agent is azodicarbonamide, the foaming accelerant is zinc oxide, and the reinforcing fiber is one of aramid fiber, polyester fiber, nylon fiber and asbestos fiber.
The curing agent is one of N-aminoethyl piperazine, diethylenetriamine, m-xylylenediamine and dicyandiamide, and the accelerator is one of a fatty amine accelerator, an anhydride accelerator, a polyether amine catalyst and a latent catalyst.
A preparation method of an expansion type structure adhesive tape for automobile and rail transit is characterized by comprising the following steps:
step one, preparing mixed epoxy resin, namely adding liquid epoxy resin, solid epoxy resin and solid rubber into a kneading machine to be kneaded until the liquid epoxy resin, the solid epoxy resin and the solid rubber are uniformly melted to prepare mixed epoxy resin, and then adding inorganic filler into the mixed epoxy resin to be continuously kneaded uniformly to obtain a mixture A;
step two, adding the reinforced fibers, the modified epoxy resin, the foaming agent and the foaming accelerant into the mixture A in the step one, continuously kneading until the mixture is uniformly mixed, then adding the curing agent, the accelerant and the pigment, continuously kneading until the mixture is uniformly mixed, and obtaining a mixture B;
adding the mixture B into an internal mixer for mixing, adding the mixed material into extrusion molding equipment, and preparing the structural adhesive tape adhesive layer with the required size by using an extrusion molding machine;
and step four, attaching a low-melting-point high-temperature adhesive film with adhesive property to the surface of the adhesive layer prepared in the step three to obtain a complete product.
Preheating is needed in advance before materials are added into the kneader in the first step and mixed, the materials are kept after being heated to 85 ℃, and the temperature of the kneader is kept between 80 and 90 ℃ during mixing in the second step.
The prepared adhesive tape has the following general properties: the shear strength was 2.5MPa, the foaming ratio was 242%, and the T-peel strength was 45.3N/25 mm.
Example 2
According to the figure 1, the embodiment provides an intumescent structure adhesive tape for automobiles and rail transit and a preparation method thereof, and the intumescent structure adhesive tape comprises an adhesive film and an adhesive layer, wherein the adhesive layer is formed by mixing 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6% of mixed epoxy resin, reinforcing fibers, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment in percentage by weight.
The composite material is prepared by mixing 51.5%, 1%, 22.5%, 15%, 1%, 3%, 5%, 1% and 0.5% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment.
The mixed epoxy resin is prepared by mixing liquid epoxy resin, solid epoxy resin and solid rubber, wherein the proportion of the liquid epoxy resin, the solid epoxy resin and the solid rubber is 20.5 percent, 25 percent and 6 percent.
The inorganic filler is calcium carbonate, the foaming agent is azodicarbonamide, the foaming accelerant is zinc oxide, and the reinforcing fiber is one of aramid fiber, polyester fiber, nylon fiber and asbestos fiber.
The curing agent is one of N-aminoethyl piperazine, diethylenetriamine, m-xylylenediamine and dicyandiamide, and the accelerator is one of a fatty amine accelerator, an anhydride accelerator, a polyether amine catalyst and a latent catalyst.
A preparation method of an expansion type structure adhesive tape for automobile and rail transit is the same as that of the embodiment 1.
The prepared adhesive tape has the following general properties: the shear strength was 6.74MPa, the foaming ratio was 215%, and the T-peel strength was 65.5N/25 mm.
Example 3
According to the figure 1, the embodiment provides an intumescent structure adhesive tape for automobiles and rail transit and a preparation method thereof, and the intumescent structure adhesive tape comprises an adhesive film and an adhesive layer, wherein the adhesive layer is formed by mixing 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6% of mixed epoxy resin, reinforcing fibers, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment in percentage by weight.
The composite material is prepared by mixing 52.5%, 1%, 22.5%, 15%, 1%, 3%, 5%, 1% and 0.5% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment.
The mixed epoxy resin is prepared by mixing liquid epoxy resin, solid epoxy resin and solid rubber, wherein the proportion of the liquid epoxy resin, the solid epoxy resin and the solid rubber is 23.5 percent, 25 percent and 4 percent.
The inorganic filler is calcium carbonate, the foaming agent is azodicarbonamide, the foaming accelerant is zinc oxide, and the reinforcing fiber is one of aramid fiber, polyester fiber, nylon fiber and asbestos fiber.
The curing agent is one of N-aminoethyl piperazine, diethylenetriamine, m-xylylenediamine and dicyandiamide, and the accelerator is one of a fatty amine accelerator, an anhydride accelerator, a polyether amine catalyst and a latent catalyst.
A preparation method of an expansion type structure adhesive tape for automobile and rail transit is the same as that of the embodiment 1.
The prepared adhesive tape has the following general properties: the shear strength was 8.3MPa, the foaming ratio was 168%, and the T-peel strength was 73.7N/25 mm.
Example 4
According to the figure 1, the embodiment provides an intumescent structure adhesive tape for automobiles and rail transit and a preparation method thereof, and the intumescent structure adhesive tape comprises an adhesive film and an adhesive layer, wherein the adhesive layer is formed by mixing 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6% of mixed epoxy resin, reinforcing fibers, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment in percentage by weight.
The composite epoxy resin foaming agent is prepared by mixing 52%, 1%, 22.5%, 15%, 1%, 5%, 1% and 0.5% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment.
The mixed epoxy resin is prepared by mixing liquid epoxy resin, solid epoxy resin and solid rubber, wherein the liquid epoxy resin, the solid epoxy resin and the solid rubber are 21%, 27% and 4% in percentage by weight.
The inorganic filler is calcium carbonate, the foaming agent is azodicarbonamide, the foaming accelerant is zinc oxide, and the reinforcing fiber is one of aramid fiber, polyester fiber, nylon fiber and asbestos fiber.
The curing agent is one of N-aminoethyl piperazine, diethylenetriamine, m-xylylenediamine and dicyandiamide, and the accelerator is one of a fatty amine accelerator, an anhydride accelerator, a polyether amine catalyst and a latent catalyst.
A preparation method of an expansion type structure adhesive tape for automobile and rail transit is the same as that of the embodiment 1.
The prepared adhesive tape has the following general properties: the shear strength was 5.1MPa, the foaming ratio was 244%, and the T-peel strength was 54.3N/25 mm.
Example 5
According to the figure 1, the embodiment provides an intumescent structure adhesive tape for automobiles and rail transit and a preparation method thereof, and the intumescent structure adhesive tape comprises an adhesive film and an adhesive layer, wherein the adhesive layer is formed by mixing 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6% of mixed epoxy resin, reinforcing fibers, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment in percentage by weight.
The composite material is prepared by mixing 52.5%, 1%, 22.5%, 15%, 1%, 5%, 1% and 0.5% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment.
The mixed epoxy resin is prepared by mixing liquid epoxy resin, solid epoxy resin and solid rubber, wherein the liquid epoxy resin, the solid epoxy resin and the solid rubber are 20.5%, 28% and 4% in proportion.
The inorganic filler is calcium carbonate, the foaming agent is azodicarbonamide, the foaming accelerant is zinc oxide, and the reinforcing fiber is one of aramid fiber, polyester fiber, nylon fiber and asbestos fiber.
The curing agent is one of N-aminoethyl piperazine, diethylenetriamine, m-xylylenediamine and dicyandiamide, and the accelerator is one of a fatty amine accelerator, an anhydride accelerator, a polyether amine catalyst and a latent catalyst.
A preparation method of an expansion type structure adhesive tape for automobile and rail transit is the same as that of the embodiment 1.
The prepared adhesive tape has the following general properties: the shear strength was 7.8MPa, the foaming ratio was 150%, and the T-peel strength was 68.1N/25 mm.
The expansion type structure adhesive tape for the automobile and the rail transit and the structure adhesive tape prepared by the preparation method have high foaming rate of the adhesive layer, have higher bonding strength with a metal plate, are favorable for reducing the self weight of the automobile and the rail transit, save energy, reduce cost, enhance the integral rigidity, static rigidity and durability of the automobile and the rail transit, improve the sound insulation and noise reduction capability of the automobile and the rail transit, can be directly attached to a bonded object for use, do not need manual film tearing operation, and are favorable for automatic and intelligent production.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. An expansion type structural adhesive tape for automobile and rail transit is characterized in that: the adhesive layer is formed by mixing 30-60%, 1-10%, 10-30%, 2-15%, 1-20%, 1-10%, 0.5-5% and 0.4-0.6% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, curing agent, accelerator and pigment.
2. The intumescent structural tape for automotive and rail transit as claimed in claim 1, wherein: the composite material is prepared by mixing 64.5%, 1%, 22.5%, 3%, 1%, 3%, 5%, 1% and 0.5% of mixed epoxy resin, reinforcing fiber, inorganic filler, modified epoxy resin, foaming agent, foaming promoter, curing agent, promoter and pigment.
3. The intumescent structural tape for automotive and rail transit as claimed in claim 1, wherein: the mixed epoxy resin is prepared by mixing liquid epoxy resin, solid epoxy resin and solid rubber, wherein the proportion of the liquid epoxy resin, the solid epoxy resin and the solid rubber is 18-25%, 25-30% and 4-17%.
4. The intumescent structural tape for automotive and rail transit as claimed in claim 1, wherein: the inorganic filler is calcium carbonate, the foaming agent is azodicarbonamide, the foaming accelerant is zinc oxide, and the reinforcing fiber is one of aramid fiber, polyester fiber, nylon fiber and asbestos fiber.
5. The intumescent structural tape for automotive and rail transit as claimed in claim 1, wherein: the curing agent is one of N-aminoethyl piperazine, diethylenetriamine, m-xylylenediamine and dicyandiamide, and the accelerator is one of a fatty amine accelerator, an anhydride accelerator, a polyether amine catalyst and a latent catalyst.
6. The method for preparing an intumescent structural adhesive tape for automobile and rail transit according to claim 1, characterized by comprising the following steps:
step one, preparing mixed epoxy resin, namely adding liquid epoxy resin, solid epoxy resin and solid rubber into a kneading machine to be kneaded until the liquid epoxy resin, the solid epoxy resin and the solid rubber are uniformly melted to prepare mixed epoxy resin, and then adding inorganic filler into the mixed epoxy resin to be continuously kneaded uniformly to obtain a mixture A;
step two, adding the reinforced fibers, the modified epoxy resin, the foaming agent and the foaming accelerant into the mixture A in the step one, continuously kneading until the mixture is uniformly mixed, then adding the curing agent, the accelerant and the pigment, continuously kneading until the mixture is uniformly mixed, and obtaining a mixture B;
adding the mixture B into an internal mixer for mixing, adding the mixed material into extrusion molding equipment, and preparing the structural adhesive tape adhesive layer with the required size by using an extrusion molding machine;
and step four, attaching a low-melting-point high-temperature adhesive film with adhesive property to the surface of the adhesive layer prepared in the step three to obtain a complete product.
7. The intumescent structural adhesive tape for automobile and rail transit and the preparation method thereof as claimed in claim 6, wherein: preheating is needed in advance before materials are added into the kneader in the first step and mixed, the materials are kept after being heated to 85 ℃, and the temperature of the kneader is kept between 80 and 90 ℃ during mixing in the second step.
CN202110687172.0A 2021-06-21 2021-06-21 Expansion type structure adhesive tape for automobile and rail transit and preparation method thereof Pending CN113388339A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5198286A (en) * 1991-06-11 1993-03-30 Nippon Zeon Co., Ltd. Panel reinforcing-sheet material and vehicle outer panel structure using the same
CN105504682A (en) * 2015-12-18 2016-04-20 优链新材料科技（上海）有限公司 Foam composition with epoxy group structure and preparation method and application thereof
CN108300392A (en) * 2018-02-08 2018-07-20 优链新材料科技（上海）有限公司 A kind of automobile self-adhering-type expansion structure adhesive tape and preparation method thereof
CN112500822A (en) * 2020-11-23 2021-03-16 上海汉司实业有限公司 Foaming type structural adhesive and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5198286A (en) * 1991-06-11 1993-03-30 Nippon Zeon Co., Ltd. Panel reinforcing-sheet material and vehicle outer panel structure using the same
CN105504682A (en) * 2015-12-18 2016-04-20 优链新材料科技（上海）有限公司 Foam composition with epoxy group structure and preparation method and application thereof
CN108300392A (en) * 2018-02-08 2018-07-20 优链新材料科技（上海）有限公司 A kind of automobile self-adhering-type expansion structure adhesive tape and preparation method thereof
CN112500822A (en) * 2020-11-23 2021-03-16 上海汉司实业有限公司 Foaming type structural adhesive and preparation method thereof

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