Automobile skylight guide rail mushroom hasp and preparation method thereof
Through the combined design of the adhesive layer composed of modified bisphenol A epoxy resin and other adhesive layer and the substrate layer, the problems of weather resistance and connection stability of mushroom buckles in long-term outdoor environments are solved, the connection strength and reliability of the automobile sunroof guide rails are improved, the service life is extended, and the environmental protection requirements are met.
Patent Information
- Application Number
- CN202510629788.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-08-08
AI Technical Summary
In the long-term outdoor environment, the existing mushroom buckles may easily lead to poor weather resistance, reduced connection stability and reliability in the presence of long-term outdoor environments, and cannot meet the strict requirements of automobile sunroof guides for connection strength.
The structural design of mushroom nails, the first substrate layer, the adhesive layer and the second substrate layer is adopted. The adhesive layer is composed of modified bisphenol A epoxy resin, 5-amino-1,3,4-thiadiazole-2-thiol, isophorone diisocyanate, γ-glycidyl etheroxypropyl trimethoxysilane, nano zinc oxide whiskers, polyimide microspheres, photoinitiators, dispersants and thermoplastic polyurethane elastomers, etc. The adhesive layer is prepared by combining ultrasonic dispersion with high-speed stirring, and the bonding performance is improved during the hot pressing composite process.
It significantly improves the weather resistance and aging stability of mushroom buckles, reduces the risk of deformation and cracking, enhances the stability and reliability of the connection, extends the service life, and considers environmental protection factors during the preparation process to avoid the emission of harmful substances.
Smart Images
Figure CN120439660A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of mushroom buckles, and more particularly to a mushroom buckle for a guide rail of an automobile sunroof and a preparation method thereof. Background Art
[0002] The car sunroof guide rail mushroom buckle is a fastener used in the car sunroof system to connect the sunroof frame and roof body and other components together. The car sunroof guide rail mushroom buckle is generally used in pairs, with the upper mushroom buckle bonded and fixed to the sunroof frame, and the lower mushroom buckle bonded and fixed to the sunroof reinforcement frame. Through the engagement of the two, the sunroof reinforcement frame and the sunroof frame are connected together, thereby achieving the fixation of the car roof on the car body, and effectively fixing the surrounding parts of the roof sunroof opening to the car body.
[0003] Mushroom buckles, as connecting components for automobile sunroof guide rails, are crucial to ensuring the stable operation of automobile sunroofs. However, existing mushroom buckles are easily exposed to ultraviolet rays, temperature and humidity changes in long-term outdoor environments, resulting in poor weather resistance, reduced connection stability and reliability, making them unable to meet the stringent requirements of automobile sunroof guide rails for connection strength, thereby increasing automobile maintenance and component replacement costs. In view of this, we propose a mushroom buckle for automobile sunroof guide rails and a preparation method thereof. Summary of the Invention
[0004] The purpose of the present invention is to provide a mushroom buckle for a car sunroof guide rail and a preparation method thereof, aiming to solve the problem that the existing mushroom buckle is easily susceptible to poor weather resistance, reduced connection stability and reliability due to ultraviolet rays, temperature and humidity changes in long-term outdoor environment.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a mushroom buckle for a sunroof guide rail of an automobile, which is composed of a mushroom nail, a first substrate layer, an adhesive layer and a second substrate layer from top to bottom; The adhesive layer is made of the following raw materials in parts by weight: 12-18 parts of modified bisphenol A epoxy resin, 1.2-2.2 parts of 5-amino-1,3,4-thiadiazole-2-thiol, 2.5-3.5 parts of isophorone diisocyanate, 3.5-4.5 parts of γ-glycidyloxypropyltrimethoxysilane, 1.5-2.5 parts of N-vinyl pyrrolidone, 0.6-1.2 parts of nano zinc oxide whiskers, 0.4-0.9 parts of polyimide microspheres, 1.2-2.2 parts of photoinitiator, 0.5-0.8 parts of dispersant, 22-30 parts of reactive diluent, and 8-15 parts of thermoplastic polyurethane elastomer.
[0006] Preferably, the first substrate layer and the second substrate layer may be selected from one of a polyethylene terephthalate layer, a polycarbonate layer, a polypropylene layer and a polyamide layer.
[0007] Preferably, the photoinitiator is one of 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-1-propanone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.
[0008] Preferably, the dispersant is one of fatty acid polyethylene glycol ester, polyvinyl pyrrolidone, and phosphate dispersants.
[0009] Preferably, the reactive diluent is one of diglycidyl ether, butyl glycidyl ether, and benzyl glycidyl ether.
[0010] Preferably, the mushroom nail is one of a polyoxymethylene mushroom nail, a polypropylene mushroom nail, and a polyphenylene sulfide mushroom nail.
[0011] Preferably, the modified bisphenol A epoxy resin is prepared by mixing bisphenol A epoxy resin and maleic anhydride in a mass ratio of 7:1-1.5, adding toluene as a solvent, and reacting at 85-105°C for 3-5 hours to obtain a carboxylated bisphenol A epoxy resin, and then mixing the carboxylated bisphenol A epoxy resin with diethylenetriamine in a mass ratio of 5:1-1.3, and reacting at 65-85°C for 2-4 hours.
[0012] A method for preparing a mushroom buckle for a sunroof guide rail of an automobile, the method being used to prepare any of the above-mentioned mushroom buckles for a sunroof guide rail of an automobile, the method comprising the following steps: S1. Weigh modified bisphenol A epoxy resin, 5-amino-1,3,4-thiadiazole-2-thiol, isophorone diisocyanate, γ-glycidyloxypropyltrimethoxysilane, N-vinyl pyrrolidone, nano zinc oxide whiskers, polyimide microspheres, photoinitiator, dispersant, reactive diluent, and thermoplastic polyurethane elastomer according to weight. , γ-glycidyloxypropyltrimethoxysilane, N-vinyl pyrrolidone, and thermoplastic polyurethane elastomer are added to a reaction kettle and stirred at 60-70° C. to mix evenly, then nano zinc oxide whiskers and polyimide microspheres are added and dispersed for 50-80 minutes by combining ultrasonic dispersion with high-speed stirring, then a photoinitiator and a dispersant are added and stirred for 40-60 minutes; finally, a reactive diluent is added and stirring is continued for 1-1.3 hours to prepare an adhesive layer; S2. Selecting a raw material selected from polyethylene terephthalate, polycarbonate, polypropylene, and polyamide, preparing a first substrate layer and a second substrate layer by an extrusion molding process, and planting mushroom nails on the first substrate layer; S3. Evenly apply the prepared adhesive layer on the lower surface of the first substrate layer, then cover the second substrate layer on the adhesive layer, and perform hot pressing and lamination at 80-90°C and 0.5-0.7MPa for 3-4 minutes to obtain a car sunroof guide rail mushroom buckle.
[0013] Compared with the prior art, the present invention has the following beneficial effects: The nano zinc oxide whiskers in the present invention have good mechanical reinforcement, antibacterial and UV resistance. In the adhesive layer, they can work synergistically with polyimide microspheres. The nano zinc oxide whiskers enhance the mechanical strength of the adhesive layer, while the polyimide microspheres improve its heat resistance and wear resistance. The combination of the two not only improves the overall performance of the adhesive layer, but also enhances the weather resistance and aging stability of the mushroom buckle, effectively reduces deformation and cracking problems during long-term use, and significantly extends the service life of the mushroom buckle.
[0014] The introduction of the thermoplastic polyurethane elastomer in the present invention gives the adhesive layer excellent flexibility and elastic recovery ability. It is cross-linked with other components such as modified bisphenol A epoxy resin, which not only improves the bonding performance but also greatly enhances the ability of the adhesive layer to adapt to the relative movement of parts, significantly reduces the risk of separation between the buckle and the substrate, and improves the stability and reliability of the connection.
[0015] The present invention modifies bisphenol A epoxy resin, significantly improving its compatibility with other raw materials, enabling it to form a more stable and dense structure in the adhesive layer, thereby comprehensively improving the overall performance of the entire adhesive layer. In addition, in the raw material selection and preparation process, environmental factors are fully considered, and the selected raw materials have excellent environmental protection properties. The preparation process does not emit harmful substances, which meets environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The figure is a schematic flow chart of the method for preparing the mushroom buckle of the present invention. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example
[0018] A mushroom buckle for a sunroof guide rail of an automobile comprises, from top to bottom, a first base material layer planted with mushroom nails, an adhesive layer, and a second base material layer; The adhesive layer is made of the following raw materials in parts by weight: 12 parts of modified bisphenol A epoxy resin, 1.2 parts of 5-amino-1,3,4-thiadiazole-2-thiol, 2.5 parts of isophorone diisocyanate, 3.5 parts of γ-glycidyloxypropyltrimethoxysilane, 1.5 parts of N-vinyl pyrrolidone, 0.6 parts of nano zinc oxide whiskers, 0.4 parts of polyimide microspheres, 1.2 parts of 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, 0.5 parts of fatty acid polyethylene glycol ester, 22 parts of diglycidyl ether, and 8 parts of thermoplastic polyurethane elastomer. The first substrate layer and the second substrate layer are both polyethylene terephthalate layers. The mushroom nails are polyformaldehyde mushroom nails. The modified bisphenol A epoxy resin is prepared by mixing bisphenol A epoxy resin and maleic anhydride in a mass ratio of 7:1, adding an appropriate amount of toluene as a solvent, and reacting at 85°C for 3 hours to obtain a carboxylated bisphenol A epoxy resin. The carboxylated bisphenol A epoxy resin is then mixed with diethylenetriamine in a mass ratio of 5:1 and reacting at 65°C for 2 hours. A method for preparing a mushroom buckle for a car sunroof guide rail is as follows: S1. Weigh all raw materials by weight. First, add modified bisphenol A epoxy resin, 5-amino-1,3,4-thiadiazole-2-thiol, isophorone diisocyanate, γ-glycidyloxypropyltrimethoxysilane, N-vinyl pyrrolidone, and thermoplastic polyurethane elastomer to a reactor and stir and mix uniformly at 60°C. Then, add nano-zinc oxide whiskers and polyimide microspheres and disperse them for 50 minutes using a combination of ultrasonic dispersion and high-speed stirring. Then, add 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone and fatty acid polyethylene glycol ester and stir for 40 minutes. Finally, add diglycidyl ether and continue stirring for 1 hour to prepare an adhesive layer. S2. Select polyethylene terephthalate as raw material, prepare a first substrate layer through an extrusion molding process, and plant polyoxymethylene mushroom nails thereon. S3. Evenly apply the prepared adhesive layer on the lower surface of the first substrate layer, then cover the second substrate layer on the adhesive layer, and perform hot pressing and lamination at 80°C and 0.5 MPa for 3 minutes to obtain a car sunroof guide rail mushroom buckle. Example
[0019] A mushroom buckle for a sunroof guide rail of an automobile, which is composed of a mushroom nail, a first base material layer, an adhesive layer and a second base material layer from top to bottom; The adhesive layer is made of the following raw materials in parts by weight: 15 parts of modified bisphenol A epoxy resin, 1.8 parts of 5-amino-1,3,4-thiadiazole-2-thiol, 3 parts of isophorone diisocyanate, 4 parts of γ-glycidyloxypropyltrimethoxysilane, 2 parts of N-vinyl pyrrolidone, 0.9 parts of nano zinc oxide whiskers, 0.6 parts of polyimide microspheres, 1.8 parts of 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-1-propanone, 0.6 parts of polyvinyl pyrrolidone, 25 parts of butyl glycidyl ether, and 12 parts of thermoplastic polyurethane elastomer. The first substrate layer and the second substrate layer are both polycarbonate layers. The mushroom nail is a polypropylene mushroom nail. The modified bisphenol A epoxy resin is prepared by mixing bisphenol A epoxy resin and maleic anhydride in a mass ratio of 7:1.2, adding an appropriate amount of toluene as a solvent, and reacting at 95°C for 4 hours to obtain a carboxylated bisphenol A epoxy resin; then, the carboxylated bisphenol A epoxy resin is mixed with diethylenetriamine in a mass ratio of 5:1.1 and reacting at 75°C for 3 hours. A method for preparing a mushroom buckle for a car sunroof guide rail is as follows: S1. Weigh all raw materials by weight. First, add modified bisphenol A epoxy resin, 5-amino-1,3,4-thiadiazole-2-thiol, isophorone diisocyanate, γ-glycidyloxypropyltrimethoxysilane, N-vinyl pyrrolidone, and thermoplastic polyurethane elastomer to a reactor and stir and mix uniformly at 65°C. Then, add nano-zinc oxide whiskers and polyimide microspheres and disperse them for 65 minutes using a combination of ultrasonic dispersion and high-speed stirring. Then, add 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-1-propanone and polyvinyl pyrrolidone and stir for 50 minutes. Finally, add butyl glycidyl ether and continue stirring for 1.1 hours to form an adhesive layer. S2. Select polycarbonate raw material, prepare a first substrate layer through an extrusion molding process, and plant polypropylene mushroom nails on it.
[0020] S3. The prepared adhesive layer is evenly coated on the lower surface of the first substrate layer, and then the second substrate layer is covered on the adhesive layer. The composite is hot-pressed at 85°C and 0.6 MPa for 3.5 minutes to obtain a mushroom buckle for the automobile sunroof guide rail. Example
[0021] A mushroom buckle for a sunroof guide rail of an automobile comprises, from top to bottom, a first base material layer planted with mushroom nails, an adhesive layer, and a second base material layer; The adhesive layer is made of the following raw materials in parts by weight: 18 parts of modified bisphenol A epoxy resin, 2.2 parts of 5-amino-1,3,4-thiadiazole-2-thiol, 3.5 parts of isophorone diisocyanate, 4.5 parts of γ-glycidyloxypropyltrimethoxysilane, 2.5 parts of N-vinyl pyrrolidone, 1.2 parts of nano zinc oxide whiskers, 0.9 parts of polyimide microspheres, 2.2 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.8 parts of phosphate dispersant, 30 parts of benzyl glycidyl ether, and 15 parts of thermoplastic polyurethane elastomer. The first substrate layer and the second substrate layer are both polypropylene layers. The mushroom nail is a polyphenylene sulfide mushroom nail. The modified bisphenol A epoxy resin is prepared by mixing bisphenol A epoxy resin and maleic anhydride in a mass ratio of 7:1.5, adding an appropriate amount of toluene as a solvent, and reacting at 105°C for 5 hours to obtain a carboxylated bisphenol A epoxy resin; then, the carboxylated bisphenol A epoxy resin is mixed with diethylenetriamine in a mass ratio of 5:1.3 and reacting at 85°C for 4 hours. A method for preparing a mushroom buckle for a car sunroof guide rail is as follows: S1. Weigh the raw materials in parts by weight. First, add modified bisphenol A epoxy resin, 5-amino-1,3,4-thiadiazole-2-thiol, isophorone diisocyanate, γ-glycidyloxypropyltrimethoxysilane, N-vinyl pyrrolidone, and thermoplastic polyurethane elastomer into a reactor and stir and mix evenly at 70°C; then add nano zinc oxide whiskers and polyimide microspheres and disperse them for 80 minutes by combining ultrasonic dispersion with high-speed stirring; then add 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and a phosphate dispersant and stir for 60 minutes; finally, add benzyl glycidyl ether and continue stirring for 1.3 hours to obtain an adhesive layer. S2. Select polypropylene raw material, prepare the first substrate layer through extrusion molding process, and plant polyphenylene sulfide mushroom nails on it.
[0022] S3. The prepared adhesive layer is evenly coated on the lower surface of the first substrate layer, and then the second substrate layer is covered on the adhesive layer. The composite is hot-pressed at 90°C and 0.7 MPa for 4 minutes to obtain a mushroom buckle for the automobile sunroof guide rail.
[0023] Comparative Example 1 This comparative example is basically the same as Example 1, except that nano zinc oxide whiskers are not added to the adhesive layer.
[0024] Comparative Example 2 This comparative example is basically the same as Example 1, except that no polyimide microspheres are added to the adhesive layer.
[0025] Comparative Example 3 This comparative example is basically the same as Example 1, except that no thermoplastic polyurethane elastomer is added to the adhesive layer.
[0026] Comparative Example 4 This comparative example is basically the same as Example 1, except that no modified bisphenol A epoxy resin is added to the adhesive layer, and unmodified bisphenol A epoxy resin is used.
[0027] Comparative Example 5 This comparative example is basically the same as Example 1, except that 5-amino-1,3,4-thiadiazole-2-thiol is not added to the adhesive layer, and other conditions are the same.
[0028] Comparative Example 6 This comparative example is basically the same as Example 1, except that isophorone diisocyanate is not added to the adhesive layer.
[0029] Comparative Example 7 This comparative example is basically the same as Example 1, except that γ-glycidyloxypropyltrimethoxysilane is not added to the adhesive layer.
[0030] Comparative Example 8 This comparative example is basically the same as Example 1, except that N-vinyl pyrrolidone is not added to the adhesive layer.
[0031] Comparative Example 9 This comparative example is basically the same as Example 1, except that no photoinitiator is added to the adhesive layer.
[0032] The performance test of the mushroom buckle prepared by the present invention is carried out, and the test results are shown in the following table:
[0033] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.
Claims
1. A mushroom buckle for a car sunroof guide rail, characterized in that: From top to bottom, it is composed of a mushroom nail, a first substrate layer, an adhesive layer and a second substrate layer; The adhesive layer is made of the following raw materials in parts by weight: 12-18 parts of modified bisphenol A epoxy resin, 1.2-2.2 parts of 5-amino-1,3,4-thiadiazole-2-thiol, 2.5-3.5 parts of isophorone diisocyanate, 3.5-4.5 parts of γ-glycidyloxypropyltrimethoxysilane, 1.5-2.5 parts of N-vinyl pyrrolidone, 0.6-1.2 parts of nano zinc oxide whiskers, 0.4-0.9 parts of polyimide microspheres, 1.2-2.2 parts of photoinitiator, 0.5-0.8 parts of dispersant, 22-30 parts of reactive diluent, and 8-15 parts of thermoplastic polyurethane elastomer.
2. The automobile sunroof guide rail mushroom buckle according to claim 1, characterized in that: The first substrate layer and the second substrate layer may be selected from one of a polyethylene terephthalate layer, a polycarbonate layer, a polypropylene layer, and a polyamide layer.
3. The automobile sunroof guide rail mushroom buckle according to claim 1, characterized in that: The photoinitiator is one of 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-1-propanone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.
4. The automobile sunroof guide rail mushroom buckle according to claim 1, characterized in that: The dispersant is one of fatty acid polyethylene glycol ester, polyvinyl pyrrolidone, and phosphate dispersants.
5. The automobile sunroof guide rail mushroom buckle according to claim 1, characterized in that: The active diluent is one of diglycidyl ether, butyl glycidyl ether and benzyl glycidyl ether.
6. The automobile sunroof guide rail mushroom buckle according to claim 1, characterized in that: The mushroom nail is one of a polyoxymethylene mushroom nail, a polypropylene mushroom nail, and a polyphenylene sulfide mushroom nail.
7. The automobile sunroof guide rail mushroom buckle according to claim 1, characterized in that: The modified bisphenol A epoxy resin is prepared by mixing bisphenol A epoxy resin and maleic anhydride in a mass ratio of 7:1-1.5, adding toluene as a solvent, and reacting at 85-105° C. for 3-5 hours to obtain a carboxylated bisphenol A epoxy resin. Subsequently, the carboxylated bisphenol A epoxy resin is mixed with diethylenetriamine in a mass ratio of 5:1-1.3, and reacting at 65-85° C. for 2-4 hours.
8. A method for preparing a mushroom buckle for a sunroof guide rail of an automobile, the method being used to prepare a mushroom buckle for a sunroof guide rail of an automobile as claimed in any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1. Weigh modified bisphenol A epoxy resin, 5-amino-1,3,4-thiadiazole-2-thiol, isophorone diisocyanate, γ-glycidyloxypropyltrimethoxysilane, N-vinyl pyrrolidone, nano zinc oxide whiskers, polyimide microspheres, photoinitiator, dispersant, reactive diluent, and thermoplastic polyurethane elastomer according to weight. , γ-glycidyloxypropyltrimethoxysilane, N-vinyl pyrrolidone, and thermoplastic polyurethane elastomer are added to a reaction kettle and stirred at 60-70° C. to mix evenly, then nano zinc oxide whiskers and polyimide microspheres are added and dispersed for 50-80 minutes by combining ultrasonic dispersion with high-speed stirring, then a photoinitiator and a dispersant are added and stirred for 40-60 minutes; finally, a reactive diluent is added and stirring is continued for 1-1.3 hours to prepare an adhesive layer; S2. Selecting a raw material selected from polyethylene terephthalate, polycarbonate, polypropylene, and polyamide, preparing a first substrate layer and a second substrate layer by an extrusion molding process, and planting mushroom nails on the first substrate layer; S3. Evenly apply the prepared adhesive layer on the lower surface of the first substrate layer, then cover the second substrate layer on the adhesive layer, and perform hot pressing and lamination at 80-90°C and 0.5-0.7MPa for 3-4 minutes to obtain a car sunroof guide rail mushroom buckle.