Glue solution for bonding polycarbonate material as well as preparation method and application of glue solution

Abstract

The invention provides a glue solution for bonding a polycarbonate material as well as a preparation method and application thereof, and the glue solution for bonding the polycarbonate material comprises the following components in percentage by volume: 50-92% of a component A, 0-40% of a component B and 5-10% of a chemical additive, the component A is an ester compound, the component B is a ketone compound, and the chemical additive comprises at least one of an alcohol compound, an acid compound and a nitrile compound. Through mutual cooperation of the component A, the component B and the chemical auxiliary agent in a specific volume ratio, the bonding strength and the bonding speed of a bonding position are improved, it can be ensured that the polycarbonate (PC) material is not prone to deformation in the long-time use process, the glossiness is promoted to reach the standard, the problems of light reflection and scattering at the bonding position are solved, and the service life of the PC material is prolonged. The application prospect of the polycarbonate material is expanded.

Description

Technical Field

[0001] The invention relates to the technical field of optical material bonding, and in particular to a glue solution for bonding polycarbonate materials, and a preparation method and application thereof. Background Art

[0002] With the advancement of science and technology and the continuous expansion of application fields, the role of optical materials in modern society is becoming increasingly important. Not only are they widely used in photography, medical imaging, machine vision and other fields, but they are also deeply involved in multiple industries such as aerospace, communications, and security monitoring. This wide range of applications places higher demands on the performance of optical materials, especially in terms of sensitivity, complexity and imaging quality.

[0003] As modern technology increases the demand for image capture and processing capabilities, the sensitivity requirements of optical materials continue to increase. This requires optical materials to be able to capture clear and detailed images under various lighting conditions, especially in low-light environments. In addition, for high-speed motion or rapidly changing scenes, optical materials also need to have the ability to capture high frame rates and high dynamic ranges.

[0004] In complex optical materials, the glue used to bond optical materials not only plays the role of fixing and aligning individual optical components, but also plays a key role in maintaining the overall optical properties of the material. The glue used to bond optical materials needs to be highly transparent to ensure that light can pass through smoothly, and also needs to have excellent optical properties such as low refractive index, low scattering, and low thermal expansion coefficient. In addition, the glue also needs to have good viscosity and strength to ensure a firm fixation between components, as well as the ability to resist external shock and vibration.

[0005] As a high polymer material, polycarbonate (PC) has been increasingly used in the optical field in recent years. It has optical properties similar to glass, such as high light transmittance and low dispersion, and is also lightweight and easy to process. This allows polycarbonate (PC) to reduce costs and improve production efficiency when manufacturing optical materials.

[0006] In the current field of optical materials, polycarbonate (PC) materials are widely used due to their excellent physical and chemical properties. However, the existing glues have problems such as insufficient bonding strength, slow curing speed, and poor anti-aging performance during the bonding process of polycarbonate (PC) materials, which causes the polycarbonate materials to easily fall off, deform, or deteriorate in optical properties during use, seriously affecting the use effect and lifespan.

[0007] In order to solve the above problems, it is necessary to optimize material selection, improve formulation and process parameters to improve the bonding quality and performance of polycarbonate (PC) materials, which has great practical prospects in the application field of optical materials.

[0008] In view of this, this application is hereby filed. Summary of the invention

[0009] The main purpose of the present invention is to provide a glue solution for bonding polycarbonate materials and a preparation method and application thereof, so as to solve one of the problems of the prior art glue in the bonding process of polycarbonate (PC) materials, namely, insufficient bonding strength, slow curing speed and poor optical properties.

[0010] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a glue solution for bonding polycarbonate materials is provided. The glue solution for bonding polycarbonate materials comprises, by volume percentage, 50-92% component A, 0-40% component B and 5-10% chemical additives; component A is an ester compound, component B is a ketone compound; the chemical additive comprises at least one of an alcohol compound, an acid compound and a nitrile compound.

[0011] Furthermore, the ester compound includes at least one of ethyl acetate, methyl acetate, ethyl formate, propyl acetate, and ethyl propionate.

[0012] Furthermore, the ketone compound includes at least one of acetone, butanone and cyclohexanone.

[0013] Furthermore, the alcohol compound includes at least one of methanol, ethanol, propanol, ethylene glycol, and propylene glycol.

[0014] Furthermore, the acid compound includes at least one of formic acid, acetic acid and butyric acid.

[0015] Further, the nitrile compound includes acetonitrile and / or propionitrile.

[0016] Furthermore, the glue solution for bonding the polycarbonate material includes, by volume percentage, 50-92% ethyl acetate, 1-40% cyclohexanone and 5-10% ethanol.

[0017] Furthermore, the glue solution for bonding the polycarbonate material includes, by volume percentage: 50-92% ethyl formate, 1-40% acetone, and 5-10% acetic acid.

[0018] Furthermore, the glue solution for bonding the polycarbonate material includes, by volume percentage: a mixed solution of 50-92% ethyl acetate and ethyl formate, 0-40% acetone, and 5-10% acetonitrile.

[0019] Furthermore, in the mixed solution of ethyl acetate and ethyl formate, the volume ratio of ethyl acetate to ethyl formate is 60-100:10-50.

[0020] According to another aspect of the present invention, a use of a glue solution for bonding polycarbonate materials in bonding polycarbonate materials is provided. The glue solution is the glue solution for bonding polycarbonate materials provided in the first aspect.

[0021] Furthermore, when the glue solution used for bonding the polycarbonate material is used for bonding the polycarbonate material, the bonding strength is greater than 13 kg, and the gray value difference is 30-90.

[0022] By applying the technical solution of the present invention, the glue solution provided by the present application for bonding polycarbonate materials utilizes the principle of similar compatibility between ester compounds and polycarbonate, so that the glue solution is prone to swelling after contacting with polycarbonate. When used for bonding polycarbonate materials, the molecules in the glue solution can penetrate into the tiny gaps between the polycarbonate molecular chains due to their smaller size and higher diffusion rate. This penetration allows the molecules to gradually destroy the original intermolecular stacking structure of the polycarbonate, causing the polycarbonate to swell. The swelling phenomenon increases the contact area and interaction between the bonding surfaces, improves the wettability and adhesion of the bonding interface, and further improves the bonding effect. The swelling phenomenon can also make the polycarbonate surface softer and easier to deform, twist and rearrange, which is conducive to further penetration and diffusion of the glue solution, forming an interface structure that is more conducive to bonding, and further improving the bonding strength. The present application also utilizes the property that polycarbonate is more sensitive to ketone compounds. By selectively adding ketone compounds, the swelling of the polycarbonate material is further promoted, thereby further promoting the improvement of the bonding strength. In addition, by adding chemical additives such as alcohol compounds, acid compounds, and nitrile compounds, the optical properties of the polycarbonate material can be better improved, the reflective effect can be reduced, and the appearance inspection standards can be met.

[0023] In addition, the components in the glue solution used for bonding polycarbonate materials in the present application have low boiling points and high volatility, and can evaporate quickly from the bonding surface, reducing residues after bonding, which helps to quickly carry out the bonding process. It can also improve the fluidity of the glue solution.

[0024] In summary, the glue solution for bonding polycarbonate materials provided in the present application improves the bonding strength and bonding speed of the bonding point through the synergy of component A, component B and chemical additives in a specific volume ratio, can ensure that the polycarbonate (PC) material is not easily deformed during long-term use, and also promotes the glossiness to meet the standard, reduces problems such as reflective scattering at the bonding point, and expands the application prospects of polycarbonate materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 The photo shows polycarbonate materials bonded to each other using the glue solution provided in Example 1. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments.

[0028] As analyzed in the background technology of this application, the existing glue has one of the problems of insufficient bonding strength, slow curing speed and poor optical performance in the bonding process of polycarbonate (PC) materials. In order to solve this problem, this application provides a glue solution for bonding polycarbonate materials and its preparation method and application.

[0029] In a typical embodiment of the present application, a glue solution for bonding polycarbonate materials is provided. The glue solution for bonding polycarbonate materials comprises, by volume percentage: 50-92% of component A, 0-40% of component B and 5-10% of chemical additives; wherein component A is an ester compound, component B is a ketone compound; and the chemical additive is at least one of an alcohol compound, an acid compound and a nitrile compound.

[0030] The glue solution provided by the present application for bonding polycarbonate materials utilizes the principle of similar compatibility between ester compounds and polycarbonate, so that the glue solution is prone to swelling after contacting with polycarbonate. When used for bonding polycarbonate materials, the molecules in the glue solution can penetrate into the tiny gaps between the polycarbonate molecular chains due to their smaller size and higher diffusion rate. This penetration allows the molecules to gradually destroy the original intermolecular stacking structure of the polycarbonate, causing the polycarbonate to swell. The swelling phenomenon increases the contact area and interaction between the bonding surfaces, improves the wettability and adhesion of the bonding interface, and thus improves the bonding effect. The swelling phenomenon can also make the polycarbonate surface softer and easier to deform, twist and rearrange, which is conducive to further penetration and diffusion of the glue solution, forming an interface structure that is more conducive to bonding, and further improving the bonding strength. The present application also utilizes the property that polycarbonate is more sensitive to ketone compounds. By selectively adding ketone compounds, the swelling of the polycarbonate material is further promoted, thereby further promoting the improvement of the bonding strength. In addition, by adding chemical additives such as alcohol compounds, acid compounds, and nitrile compounds, the optical properties of the polycarbonate material can be better improved, the reflective effect can be reduced, and the appearance inspection standards can be met.

[0031] In addition, the components in the glue solution used for bonding polycarbonate materials in the present application have low boiling points and high volatility, and can evaporate quickly from the bonding surface, reducing residues after bonding, which helps to quickly carry out the bonding process. It can also improve the fluidity of the glue solution.

[0032] In summary, the glue solution for bonding polycarbonate materials provided in the present application improves the bonding strength and bonding speed of the bonding point through the synergy of component A, component B and chemical additives in a specific volume ratio, can ensure that the polycarbonate (PC) material is not easily deformed during long-term use, and also promotes the glossiness to meet the standard, reduces problems such as reflection and scattering at the bonding point, and expands the application prospects of polycarbonate materials.

[0033] Typically but not restrictively, in the glue solution for bonding polycarbonate materials provided in the present application, the content of component A is, by volume percentage, 50%, 60%, 70%, 72.7%, 75%, 80%, 90%, 92% or a range consisting of any two values, the content of component B is 0%, 1%, 10%, 18.2%, 20%, 25%, 30%, 40% or a range consisting of any two values, and the content of chemical additives is 5%, 6%, 7%, 8%, 9%, 10% or a range consisting of any two values.

[0034] In some embodiments, the ester compound includes any one or more of ethyl acetate, methyl acetate, ethyl formate, propyl acetate, and ethyl propionate; the ketone compound includes any one or more of acetone, butanone, and cyclohexanone; the alcohol compound includes any one or more of methanol, ethanol, propanol, ethylene glycol, and propylene glycol; the acid compound includes any one or more of formic acid, acetic acid, and butyric acid; and the nitrile compound includes acetonitrile and / or propionitrile. By limiting the ester compound, ketone compound, alcohol compound, acid compound, and nitrile compound to any one or more of the above components, the bonding strength and bonding speed of the bonding point can be further improved, and the reflected light scattering at the bonding point can be further reduced, so as to meet the appearance inspection standard.

[0035] In some embodiments, the glue solution used to bond the polycarbonate material includes, by volume percentage: 50-92% ethyl acetate, 1-40% cyclohexanone and 5-10% ethanol. The ethyl acetate, cyclohexanone and ethanol in a specific volume ratio work together to further promote the swelling of the polycarbonate, improve the bonding strength, and further increase the volatilization rate of the glue solution on the bonding surface, so that the bonding process is carried out quickly, and there is almost no glue solution residue at the bonding point after bonding. In addition, the three work together to further reduce the glossiness of the bonding point and reduce the reflective effect.

[0036] Typically but not limiting, by volume percentage, the glue solution used to bond polycarbonate materials contains 50%, 60%, 70%, 81.8%, 92% or a range consisting of any two values ​​of ethyl acetate, 1%, 9.1%, 10%, 25%, 30%, 40% or a range consisting of any two values ​​of cyclohexanone, and 5%, 6%, 7%, 8%, 9.1%, 10% or a range consisting of any two values ​​of ethanol.

[0037] In some embodiments, the glue solution used to bond the polycarbonate material includes, by volume percentage: 50-92% ethyl formate, 1-40% acetone, and 5-10% acetic acid. The specific ratio of ethyl formate, acetone, and acetic acid can cooperate with each other to further promote the swelling of polycarbonate, improve the bonding strength, and further increase the volatilization rate of the glue solution on the bonding surface, so that the bonding process is carried out quickly. After bonding, there is almost no glue solution residue at the bonding point. In addition, the three can cooperate with each other to further reduce the glossiness of the bonding point and reduce the reflective effect.

[0038] Typically but not limiting, by volume percentage, the glue solution used to bond polycarbonate materials contains 50%, 60%, 70%, 72.7%, 80%, 92% or a range consisting of any two values ​​of ethyl formate, 1%, 10%, 18.2%, 25%, 30%, 40% or a range consisting of any two values ​​of acetone, and 5%, 6%, 7%, 8%, 9.1%, 10% or a range consisting of any two values ​​of acetone.

[0039] In some embodiments, the glue solution for bonding polycarbonate materials includes, by volume percentage: a mixed solution of 50-92% ethyl acetate and ethyl formate, 0-40% acetone and 5-10% acetonitrile. Through the synergistic effect between various types of ester compounds, and the penetration of different ester small molecules into the polycarbonate molecular chains at different rates according to molecular differences, the polycarbonate is further gradually swollen to increase the contact area of ​​the bonding point, thereby further enhancing the bonding strength. Under the synergistic effect of the two ester compounds of ethyl acetate and ethyl formate, when no ketone compound is added, the bonding strength can also be promoted. In summary, ethyl acetate, ethyl formate, acetone and acetonitrile within the above-mentioned volume ratio range cooperate with each other to further increase the volatilization rate of the glue solution, so that the bonding process proceeds quickly and reduces the surface glue solution residue. And by adjusting the viscosity, fluidity, diffusivity and surface roughness of the glue solution within the above-mentioned volume ratio, the flow direction and diffusion of the glue solution during the dispensing process are further controlled.

[0040] In order to further enhance the bonding strength of the glue solution, it is preferred that the volume ratio of ethyl acetate to ethyl formate in the mixed solution of ethyl acetate and ethyl formate is 60-100:10-50.

[0041] Typically but not limiting, by volume percentage, in the glue solution used to bond polycarbonate materials, the content of the mixed solution of ethyl acetate and ethyl formate is 50%, 60%, 70%, 72.7%, 75%, 80%, 90%, 92% or a range consisting of any two values, the content of acetone is 0%, 1%, 10%, 18.2%, 20%, 25%, 30%, 40% or a range consisting of any two values, and the content of acetonitrile is 5%, 6%, 7%, 8%, 9.1%, 10% or a range consisting of any two values.

[0042] Typically, but not limiting, the volume ratio of ethyl acetate to ethyl formate is 6:1, 6:5, 10:1, 2:1 or a range consisting of any two of these values.

[0043] In a second typical embodiment of the present application, a use of a glue solution for bonding polycarbonate materials is provided, wherein the glue solution is the glue solution for bonding polycarbonate materials provided in the first typical embodiment.

[0044] The glue solution for bonding polycarbonate materials provided in the present application, through the synergy of component A, component B and chemical additives in a specific volume ratio, can improve the bonding strength and bonding speed of the bonding point and reduce the glossiness of the bonding point in the application of bonding polycarbonate materials, ensure that the polycarbonate (PC) material is not easy to deform during long-term use, and expand the application prospects of polycarbonate materials.

[0045] In some embodiments, when the adhesive solution used for bonding polycarbonate materials is used for bonding polycarbonate materials, the bonding strength is greater than 13 kg, and the gray value difference is 30 to 90. The beneficial effects of the present application will be further described below in combination with the embodiments and comparative examples.

[0046] The raw materials used in this application are all commercially available products, and the purchase manufacturers are shown in Table 1.

[0047] Table 1

[0048] Solvent name and purity factory <![CDATA[Ethyl acetate (CH 3 COOCH 2 CH 3 ), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Ethyl formate (HCOOC 2 H 5 ), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Methyl acetate (CH 3 COOCH 3 ), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Acetone (CH 3 COCH 3 ), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Cyclohexanone (C 6 H 10 O), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Methanol (CH 3 OH), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Ethanol (CH 3 CH 2 OH), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Propylene glycol (CH 3 CHOHCH 2 OH), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Acetic acid (CH 3 COOH), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. Formic acid (HCOOH), AR Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Acetonitrile (CH 3 CN), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd. <![CDATA[Propionitrile (CH 3 CH 2 CN), AR]]> Sigma-Aldrich (Shanghai) Trading Co., Ltd.

[0049] Note: Since some of the above solvents are volatile, flammable and highly dangerous, the above organic solvents are all contained in sealed glass products to improve their storage safety.

[0050] Example 1

[0051] This embodiment provides a glue solution for bonding polycarbonate materials, which is prepared according to the following steps:

[0052] 9 parts of ethyl acetate and 1 part of cyclohexanone are mixed by volume, and the mixture is shaken in an ultrasonic oscillator for 20 minutes, and then 1 part of ethanol is added and ultrasonically shaken for 30 minutes to obtain a glue solution for bonding polycarbonate materials. In the glue solution for bonding polycarbonate materials, the content of ethyl acetate is 81.8%, the content of cyclohexanone is 9.1%, and the content of ethanol is 9.1%.

[0053] Example 2

[0054] This embodiment provides a glue solution for bonding polycarbonate materials, which is prepared according to the following steps:

[0055] 8 parts of ethyl formate and 2 parts of acetone were mixed by volume, stirred for 30 minutes, and then 1 part of acetic acid was added, and ultrasonic vibration was performed for 30 minutes to obtain a glue solution for bonding polycarbonate materials. In the glue solution for bonding polycarbonate materials, the content of ethyl formate was 72.7%, the content of cyclohexanone was 18.2%, and the content of acetic acid was 9.1%.

[0056] Example 3

[0057] This embodiment provides a glue solution for bonding polycarbonate materials, which is prepared according to the following steps:

[0058] 6 parts of ethyl acetate and 3 parts of ethyl formate are mixed by volume, stirred for 30 minutes, and a mixed solution of ethyl acetate and ethyl formate is obtained, and then 1 part of acetonitrile is added, and ultrasonic oscillation is performed for 30 minutes to obtain a glue solution for bonding polycarbonate materials. In the glue solution for bonding polycarbonate materials, the content of the mixed solution of ethyl acetate and ethyl formate is 90%, and the content of acetonitrile is 10% by volume.

[0059] Example 4

[0060] The difference from Example 1 is that this embodiment adjusts the dosage of each component so that, by volume percentage, the content of ethyl acetate, cyclohexanone and ethanol in the glue solution used for bonding polycarbonate materials is 50%, 40% and 10%.

[0061] Example 5

[0062] The difference from Example 1 is that this embodiment adjusts the dosage of each component so that, by volume percentage, the content of ethyl acetate, cyclohexanone and ethanol in the glue solution used for bonding polycarbonate materials is 92%, 1% and 7%.

[0063] Example 6

[0064] The difference from Example 1 is that this embodiment adjusts the dosage of each component so that, by volume percentage, the content of ethyl acetate, cyclohexanone and ethanol in the glue solution used for bonding polycarbonate materials is 70%, 25% and 5%, respectively.

[0065] Example 7

[0066] The difference from Example 1 is that the chemical auxiliary agent in this example is replaced by methanol.

[0067] Example 8

[0068] The difference from Example 1 is that the chemical auxiliary agent in this example is replaced by propylene glycol.

[0069] Example 9

[0070] The difference from Example 2 is that this embodiment adjusts the amount of each component so that, by volume percentage, the content of ethyl formate in the glue solution used for bonding polycarbonate materials is 92%, the content of acetone is 1%, and the content of acetic acid is 7%.

[0071] Example 10

[0072] The difference from Example 2 is that this embodiment adjusts the amount of each component so that, by volume percentage, the content of ethyl formate, 40% of acetone and 10% of acetic acid in the glue solution used for bonding polycarbonate materials is 50%.

[0073] Embodiment 11

[0074] The difference from Example 2 is that this embodiment adjusts the amount of each component so that, by volume percentage, the content of ethyl formate, the content of acetone, and the content of acetic acid in the glue solution used for bonding polycarbonate materials are 70%, 25%, and 5%, respectively.

[0075] Example 12

[0076] The difference from Example 2 is that the chemical auxiliary agent in this example is replaced by formic acid.

[0077] Embodiment 13

[0078] The difference from Example 3 is that in this embodiment, acetone is added, and the volume ratio of ethyl acetate to ethyl formate is maintained at 2:1. By adjusting the amount of each component, the content of the mixed solution of ethyl acetate and ethyl formate in the glue solution used for bonding polycarbonate materials is 50%, the content of acetone is 40%, and the content of acetonitrile is 10%, calculated by volume percentage.

[0079] Embodiment 14

[0080] The difference from Example 3 is that in this embodiment, acetone is added, and the volume ratio of ethyl acetate to ethyl formate is maintained at 2:1. By adjusting the amount of each component, the content of the mixed solution of ethyl acetate and ethyl formate in the glue solution used for bonding polycarbonate materials is 92%, the content of acetone is 1%, and the content of acetonitrile is 7%, calculated by volume percentage.

[0081] Embodiment 15

[0082] The difference from Example 3 is that in this embodiment, acetone is added, and the volume ratio of ethyl acetate to ethyl formate is maintained at 2:1. By adjusting the amount of each component, the content of the mixed solution of ethyl acetate and ethyl formate in the glue solution used for bonding polycarbonate materials is 75%, the content of acetone is 20%, and the content of acetonitrile is 5%, calculated by volume percentage.

[0083] Example 16

[0084] The difference from Example 3 is that in this example, the volume ratio of ethyl acetate to ethyl formate is 6:1.

[0085] Embodiment 17

[0086] The difference from Example 3 is that in this example, the volume ratio of ethyl acetate to ethyl formate is 6:5.

[0087] Embodiment 18

[0088] The difference from Example 3 is that in this example, the volume ratio of ethyl acetate to ethyl formate is 10:1.

[0089] Embodiment 19

[0090] The difference from Example 3 is that in this example, the chemical auxiliary agent is replaced by propionitrile.

[0091] Comparative Example 1

[0092] The difference from Example 1 is that this comparative example adjusts the dosage of each component so that, by volume percentage, the content of ethyl acetate, cyclohexanone and ethanol in the glue solution used for bonding polycarbonate materials is 95%, 2% and 3%, respectively.

[0093] Comparative Example 2

[0094] The difference from Example 1 is that this comparative example adjusts the dosage of each component so that, by volume percentage, the content of ethyl acetate, cyclohexanone and ethanol in the glue solution used for bonding polycarbonate materials is 48%, 35% and 17%.

[0095] Comparative Example 3

[0096] The difference from Example 1 is that cyclohexanone is not added in this comparative example, so that the content of ethyl acetate and the content of ethanol in the glue solution used for bonding polycarbonate materials are 96% and 4% by volume.

[0097] Comparative Example 4

[0098] The difference from Example 1 is that ethanol is not added in this comparative example, so that the content of ethyl acetate in the glue solution used for bonding polycarbonate materials is 98% and the content of cyclohexanone is 2% by volume.

[0099] Comparative Example 5

[0100] The difference from Example 2 is that this comparative example adjusts the amount of each component so that, by volume percentage, the content of ethyl formate in the glue solution used for bonding polycarbonate materials is 96%, the content of acetone is 3.5%, and the content of acetic acid is 0.5%.

[0101] Comparative Example 6

[0102] The difference from Example 2 is that this comparative example adjusts the amount of each component so that, by volume percentage, the content of ethyl formate in the glue solution used for bonding polycarbonate materials is 60%, the content of acetone is 25%, and the content of acetic acid is 15%.

[0103] Comparative Example 7

[0104] The difference from Example 2 is that acetone is not added in this comparative example, so that the content of ethyl formate in the glue solution used for bonding polycarbonate materials is 90% and the content of acetic acid is 10% by volume.

[0105] Comparative Example 8

[0106] The difference from Example 2 is that acetic acid is not added in this comparative example, so that the content of ethyl formate and the content of acetone in the glue solution used for bonding polycarbonate materials are 50% and 50% respectively by volume.

[0107] Comparative Example 9

[0108] The difference from Example 3 is that this comparative example adjusts the amount of each component, so that the content of ethyl acetate, ethyl formate, acetone and acetonitrile in the glue solution used for bonding polycarbonate materials is 55%, 25%, 5% and 15% by volume.

[0109] Comparative Example 10

[0110] The difference from Example 3 is that this comparative example adjusts the amount of each component, so that the content of ethyl acetate, ethyl formate, acetone and acetonitrile in the glue solution used for bonding polycarbonate materials is 31%, 15%, 50% and 4% by volume.

[0111] Comparative Example 11

[0112] The difference from Example 3 is that acetone is not added in this comparative example, so that, by volume percentage, the content of ethyl acetate in the glue solution used for bonding polycarbonate materials is 55%, the content of ethyl formate is 42%, and the content of acetonitrile is 3%.

[0113] Comparative Example 12

[0114] The difference from Example 3 is that acetonitrile is not added in this comparative example, so that the content of ethyl acetate, ethyl formate and acetone in the glue solution used for bonding polycarbonate materials is 25%, 15% and 60% by volume.

[0115] Test Example 1

[0116] 1. Test of bonding strength:

[0117] The glue solution samples provided in the above embodiments and comparative examples were used to perform point glue bonding at the bonding points of two polycarbonate materials. After completion, the samples were dried in a 70°C blast drying oven for 2 hours to obtain the samples to be tested. The samples to be tested were placed in a thrust machine for bonding strength testing, and the results are shown in Table 2. Among them, when the two polycarbonate materials are well bonded and meet the bonding strength standard (≥13kg), it is excellent.

[0118] Use the glue solution provided in Example 1 to perform point glue bonding on two polycarbonate materials. Figure 1 It can be seen that the two polycarbonate materials are bonded together, proving that the glue solution has a good bonding effect on the polycarbonate material.

[0119] 2. Appearance visual inspection:

[0120] After the two polycarbonate materials were bonded, the technicians conducted a preliminary visual evaluation of the appearance of the bonded area. The grayscale value of the bonded area and the unbonded area were tested respectively. The grayscale value difference between the two was calculated, and the results are shown in Table 2. When the grayscale value difference between the bonded area and the unbonded area is within 30-90, it is excellent.

[0121] When both the bonding strength and visual appearance inspection meet the above requirements, it is qualified.

[0122] Table 2

[0123]

[0124]

[0125]

[0126] It can be seen from the results of the embodiments and comparative examples that, by volume percentage, when the glue solution used for bonding polycarbonate materials includes: 50-92% component A, 0-40% component B and 5-10% chemical additives; and component A is an ester compound, component B is a ketone compound; and the chemical additive includes at least one of an alcohol compound, an acid compound and a nitrile compound, the polycarbonate material bonded by the glue solution has strong bonding strength and excellent optical properties at the bonding point, and the bonding strength and visual appearance inspection meet the qualified requirements at the same time. When the component content is adjusted, the bonding strength and visual appearance inspection cannot meet the qualified requirements at the same time.

[0127] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0128] The glue solution provided by the present application for bonding polycarbonate materials utilizes the principle of similar compatibility between ester compounds and polycarbonate, so that the glue solution is prone to swelling after contacting with polycarbonate. When used for bonding polycarbonate materials, the molecules in the glue solution can penetrate into the tiny gaps between the polycarbonate molecular chains due to their smaller size and higher diffusion rate. This penetration allows the molecules to gradually destroy the original intermolecular stacking structure of the polycarbonate, causing the polycarbonate to swell. The swelling phenomenon increases the contact area and interaction between the bonding surfaces, improves the wettability and adhesion of the bonding interface, and thus improves the bonding effect. The swelling phenomenon can also make the polycarbonate surface softer and easier to deform, twist and rearrange, which is conducive to further penetration and diffusion of the glue solution, forming an interface structure that is more conducive to bonding, and further improving the bonding strength. The present application also utilizes the property that polycarbonate is more sensitive to ketone compounds. By selectively adding ketone compounds, the swelling of the polycarbonate material is further promoted, thereby further promoting the improvement of the bonding strength. In addition, by adding chemical additives such as alcohol compounds, acid compounds, and nitrile compounds, the optical properties of the polycarbonate material can be better improved, the reflective effect can be reduced, and the appearance inspection standards can be met.

[0129] In addition, the components in the glue solution used for bonding polycarbonate materials in the present application have low boiling points and high volatility, and can evaporate quickly from the bonding surface, reducing residues after bonding, which helps to quickly carry out the bonding process and can also improve the fluidity of the glue solution.

[0130] In summary, the glue solution for bonding polycarbonate materials provided in the present application improves the bonding strength and bonding speed of the bonding point through the synergy of component A, component B and chemical additives in a specific volume ratio, can ensure that the polycarbonate (PC) material is not easily deformed during long-term use, and also promotes the glossiness to meet the standard, reduces problems such as reflection and scattering at the bonding point, and expands the application prospects of polycarbonate materials.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A glue solution for bonding polycarbonate materials, characterized in that: The glue solution for bonding polycarbonate materials comprises, by volume percentage: 50-92% component A, 0-40% component B and 5-10% chemical additives; The component A is an ester compound, the component B is a ketone compound, and the chemical auxiliary agent includes at least one of an alcohol compound, an acid compound and a nitrile compound.

2. The glue solution for bonding polycarbonate materials according to claim 1, characterized in that: The ester compound includes at least one of ethyl acetate, methyl acetate, ethyl formate, propyl acetate and ethyl propionate.

3. The glue solution for bonding polycarbonate materials according to claim 1, characterized in that: The ketone compound includes at least one of acetone, butanone and cyclohexanone.

4. The glue solution for bonding polycarbonate materials according to claim 1, characterized in that: The alcohol compound includes at least one of methanol, ethanol, propanol, ethylene glycol, and propylene glycol; And / or, the acid compound includes at least one of formic acid, acetic acid, and butyric acid; And / or, the nitrile compound includes acetonitrile and / or propionitrile.

5. The glue solution for bonding polycarbonate materials according to any one of claims 1 to 4, characterized in that: Calculated by volume percentage, the glue solution used for bonding the polycarbonate material comprises: 50-92% ethyl acetate, 1-40% cyclohexanone and 5-10% ethanol.

6. The glue solution for bonding polycarbonate materials according to any one of claims 1 to 4, characterized in that: Calculated by volume percentage, the glue solution used for bonding the polycarbonate material includes: 50-92% ethyl formate, 1-40% acetone, and 5-10% acetic acid.

7. The glue solution for bonding polycarbonate materials according to any one of claims 1 to 4, characterized in that: Measured by volume percentage, the glue solution used for bonding the polycarbonate material comprises: a mixed solution of 50-92% ethyl acetate and ethyl formate, 0-40% acetone, and 5-10% acetonitrile.

8. The glue solution for bonding polycarbonate materials according to claim 7, characterized in that: In the mixed solution of ethyl acetate and ethyl formate, the volume ratio of ethyl acetate to ethyl formate is 60-100:10-50.

9. Use of a glue solution for bonding polycarbonate materials in bonding polycarbonate materials, wherein the glue solution is the glue solution for bonding polycarbonate materials according to any one of claims 1 to 8.

10. The use according to claim 9, characterized in that: When the glue solution for bonding polycarbonate materials is used to bond polycarbonate materials, the bonding strength is greater than 13kg and the gray value difference is 30-90.

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