A surface treatment process for glass microbubbles

Abstract

The invention relates to the technical field of glass microbubbles, and in particular to a surface treatment process for glass microbubbles, comprising the following steps: obtaining a glass microbubble raw material, performing wet modification to obtain a modified glass microbubble raw material; preparing a modified powder, and keeping it for use after the preparation is completed; preparing a modified solution, and keeping it for use after the preparation is completed; mixing the modified glass microbubble raw material obtained in step S1 with the modified powder obtained in step S2; the invention realizes the surface treatment of the glass microbubbles by wet modification of the glass microbubble raw material and mixing the modified powder with the modified solution, after the glass microbubble raw material is wet modified and mixed with the modified powder, the surface of the glass microbubbles is firmly attached to the modified powder, and the modified solution added subsequently can be in uniform contact with the modified powder, so that the modified solution effectively and evenly covers the surface of the glass microbubbles, which is helpful to improve the fluidity of the glass microbubbles.

Description

Technical Field

[0001] The invention relates to the technical field of glass microbubbles, in particular to a surface treatment process of glass microbubbles. Background Art

[0002] Glass microbubbles, also known as hollow glass microspheres or glass bubbles, are a special type of glass product. Glass microbubbles are usually made from a soda-lime-borosilicate glass blend and have the advantages of low density, high heat resistance and chemical resistance.

[0003] In the prior art, during the preparation process of glass microbubbles, a modified solution is usually required to be mixed with the glass microbubbles to form a coating on the surface of the glass microbubbles to improve the fluidity of the glass microbubbles. However, the glass microbubbles are not flat, and the solution has poor adhesion to the surface of the glass microbubbles, so that the surface of the glass microbubbles cannot be evenly covered with the modified solution, which affects the fluidity of the glass microbubbles, thereby affecting the use effect of the glass microbubbles. Based on this, the present invention provides a surface treatment process for glass microbubbles. Summary of the invention

[0004] The purpose of the present invention is to provide a surface treatment process for glass microbubbles. The glass microbubbles prepared by the present invention not only have good fluidity, but also have excellent gloss performance, thereby effectively improving the use effect of the glass microbubbles.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A surface treatment process for glass microbubbles comprises the following steps:

[0007] S1: obtaining a glass microbubble raw material, and performing wet modification to obtain a modified glass microbubble raw material;

[0008] S2: preparing the modified powder and setting it aside for use after the preparation is completed;

[0009] S3: preparing a modified solution and setting it aside for use after the preparation is completed;

[0010] S4: mixing the modified glass microbubble raw material obtained in step S1 with the modified powder obtained in step S2, and adding the modified solution obtained in step S3 after the mixing is completed, so as to complete the preliminary surface treatment of the glass microbubbles;

[0011] S5: After the glass microbubbles that have completed the preliminary surface treatment in step S3 are dispersed and regrouped, the surface treatment process of the glass microbubbles is completed.

[0012] Preferably, the processing of the modified glass microbubble raw material in step S1 comprises the following steps:

[0013] Step 1: Soak the glass microbubble raw material in water for 5-7 hours, wherein the mass ratio of the glass microbubble to water is 1:20, and during the soaking process, the water is heated to 50-70°C and kept warm. During the soaking process, glycerol accounting for 0.6-0.8% of the mass of the water is added dropwise and mixed thoroughly. After the soaking is completed, the glass microbubble raw material is filtered and dried;

[0014] Step 2: Put the glass microbubble raw material processed in step 1 into a container, add an adhesive accounting for 1.5-1.8% of the mass of the glass microbubble raw material, mix well and let stand for 40-50 minutes;

[0015] Step 3: Put the glass microbubble raw material after standing in step 2 into a mixer, add an adhesive accounting for 0.8-1% of the mass of the glass microbubble raw material, and process it at a medium-low speed for 2-3 minutes to obtain a modified glass microbubble raw material.

[0016] Preferably, the preparation method of the adhesive is as follows: the raw materials of the adhesive include 20-25 parts of waterborne polyurethane resin, 15-20 parts of epoxy resin, 8-10 parts of di-n-butylamine, 8-10 parts of catalyst and 5-8 parts of cross-linking agent.

[0017] Preferably, the processing method of the adhesive raw material is: weigh water-based polyurethane resin, epoxy resin, di-n-butylamine, catalyst and cross-linking agent as needed, add them into a three-necked flask, vacuum dehydrate at 110-130°C for 2-3h, cool to room temperature after the processing is completed, stand for 40-50min to wait for reaction, heat to 60-70°C after standing, continue to cool to room temperature, stand for 20-30min to wait for reaction, add 5-8% of the total mass of butanediol, heat to 60-70°C, stir continuously during the heating process, keep warm for 2-3h and then cool to room temperature to obtain the adhesive.

[0018] Preferably, the catalyst is any one of vanadium pentoxide, molybdenum trioxide, and hydrolase, and the cross-linking agent is any one of hexyl orthosilicate and trimethoxysilane.

[0019] Preferably, the preparation method of the modified powder is: selecting the particle size D 50 The polyethylene powder with a size below 30 μm is mixed with a brightener accounting for 3-5% by weight, and then dried, ground and sieved to obtain a modified powder.

[0020] Preferably, the preparation method of the modified solution is: polypropylene and bromohexane solution are mixed and added into a flask, the mass ratio of polypropylene to bromohexane solution is 1:10, to obtain a mixed solution, and then potassium iodide accounting for 5-8% of the mass of the mixed solution is added, heated to 50-60°C, and kept warm for reaction for 8-10h, and acrylate accounting for 2-3% of the mass of the mixed solution is added, heated to 80-90°C, and kept warm for reaction for 2-3h, to obtain the modified solution.

[0021] Preferably, the mixing method in step S4 is: weigh the modified glass microbubble raw material as needed and add it to the mixing equipment, then add the modified powder accounting for 5-8% of the weight of the modified glass microbubble raw material, and mix the mixture at a medium-low speed for 8-10 minutes, add the modified solution accounting for 4-6% of the weight of the modified glass microbubble raw material, and mix the mixture at a medium-low speed for 2-5 minutes, thereby completing the preliminary surface treatment of the glass microbubbles.

[0022] Preferably, the dispersion treatment method in step S5 is: spreading the glass microbubbles that have completed the preliminary surface treatment on the bottom of the disperser and treating them at a low speed for 4-6 minutes. The regrouping treatment method in step S5 is: adding the glass microbubbles that have completed the first dispersion treatment into a vacuum bag, sealing the vacuum bag and sending it into a vacuum machine, evacuating the vacuum bag and letting it stand for 2-4 hours, and then taking it out to complete the surface treatment of the glass microbubbles.

[0023] Furthermore, a glass microbubble is formed by a surface treatment process of the glass microbubble.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention realizes surface treatment of glass microbubbles by wet modification of glass microbubble raw materials and mixing modified powder with modified solution. After the glass microbubble raw materials are wet modified and mixed with modified powder, the modified powder is more firmly attached to the surface of the glass microbubbles. The modified solution added subsequently can be in uniform contact with the modified powder, so that the modified solution effectively and evenly covers the surface of the glass microbubbles, which helps to improve the fluidity of the glass microbubbles.

[0026] 2. The present invention prepares modified powder by mixing a brightener. After the glass microbubbles are wet-modified, the brightener is mixed and evenly covered on the surface of the glass microbubbles. The modified powder evenly covers and fills the micropores on the surface of the glass microbubbles, effectively improving the gloss of the glass microbubbles. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] A surface treatment process for glass microbubbles comprises the following steps:

[0030] S1: obtaining a glass microbubble raw material, and performing wet modification to obtain a modified glass microbubble raw material;

[0031] S2: preparing the modified powder and setting it aside for use after the preparation is completed;

[0032] S3: preparing a modified solution and setting it aside for use after the preparation is completed;

[0033] S4: mixing the modified glass microbubble raw material obtained in step S1 with the modified powder obtained in step S2, and adding the modified solution obtained in step S3 after the mixing is completed, so as to complete the preliminary surface treatment of the glass microbubbles;

[0034] S5: After the glass microbubbles that have completed the preliminary surface treatment in step S3 are dispersed and regrouped, the surface treatment process of the glass microbubbles is completed.

[0035] First, the processing of the modified glass microbubble raw material in step S1 includes the following steps:

[0036] Step 1: Soak the glass microbubble raw material in water for 5 hours, with the mass ratio of glass microbubble to water being 1:20. During the soaking process, heat the water to 50°C and keep it warm. During the soaking process, add glycerol at a mass ratio of 0.6% of the water and mix thoroughly. After the soaking is completed, filter and dry the glass microbubble raw material;

[0037] Step 2: Put the glass microbubble raw material processed in step 1 into a container, add an adhesive accounting for 1.5% of the mass of the glass microbubble raw material, mix well and let stand for 40 minutes;

[0038] Step 3: Put the glass microbubble raw material after standing in step 2 into a mixer, add an adhesive accounting for 0.8% of the mass of the glass microbubble raw material, and process it at a medium-low speed for 2 minutes to obtain a modified glass microbubble raw material.

[0039] The preparation method of the adhesive is as follows: the raw materials of the adhesive include 20 parts of waterborne polyurethane resin, 15 parts of epoxy resin, 8 parts of di-n-butylamine, 8 parts of catalyst and 5 parts of cross-linking agent.

[0040] Furthermore, the processing method of the adhesive raw material is as follows: weigh water-based polyurethane resin, epoxy resin, di-n-butylamine, catalyst and cross-linking agent as needed, add them into a three-necked flask, vacuum dehydrate at 110°C for 2 hours, cool to room temperature after the treatment, let stand for 40 minutes to wait for the reaction, heat to 60°C after the standing, continue to cool to room temperature, let stand for 20 minutes to wait for the reaction, add 5% of the total mass of butanediol, heat to 60°C, continue to stir during the heating process, keep warm for 2 hours and then cool to room temperature to obtain the adhesive.

[0041] Furthermore, the catalyst is vanadium pentoxide, and the cross-linking agent is hexyl orthosilicate.

[0042] Furthermore, the preparation method of the modified powder is: selecting the particle size D 50 The polyethylene powder with a size of less than 30 μm is mixed with a brightener accounting for 3% by weight, and then dried, ground and sieved to obtain a modified powder.

[0043] Furthermore, the preparation method of the modified solution is: polypropylene and bromohexane solution are mixed and added into a flask, the mass ratio of polypropylene to bromohexane solution is 1:10, to obtain a mixed solution, and then potassium iodide accounting for 5% of the mass of the mixed solution is added, heated to 50°C, and kept warm for reaction for 8 hours, and acrylate accounting for 2% of the mass of the mixed solution is added, heated to 80°C, and kept warm for reaction for 2 hours to obtain a modified solution.

[0044] Furthermore, the mixing method in step S4 is: weigh the modified glass microbubble raw material as needed and add it to the mixing equipment, then add the modified powder accounting for 5% of the mass of the modified glass microbubble raw material, and mix it at a medium-low speed for 8 minutes in the mixing equipment, add the modified solution accounting for 4% of the mass of the modified glass microbubble raw material, and mix it at a medium-low speed for 2 minutes in the mixing equipment, thereby completing the preliminary surface treatment of the glass microbubbles.

[0045] Furthermore, the dispersion treatment method in step S5 is: spreading the glass microbubbles that have completed the preliminary surface treatment on the bottom of the disperser and treating them at a low speed for 4 minutes. The reaggregation treatment method in step S5 is: adding the glass microbubbles that have completed the first dispersion treatment into a vacuum bag, sealing the vacuum bag and sending it into a vacuum machine, evacuating the vacuum bag and letting it stand for 2 hours, and then taking it out to complete the surface treatment of the glass microbubbles.

[0046] This embodiment also provides a glass microbubble, which is formed by a surface treatment process of the glass microbubble.

[0047] Embodiment 2

[0048] The preparation method of the surface treatment process of glass microbubbles in this embodiment is basically the same as that in Example 1, except that the specific ratios of the raw materials used and the preparation methods of the functional additives used in the two are different. The specific ratios of the raw materials used in the surface treatment process of glass microbubbles in this embodiment and the preparation methods of the functional additives are as follows:

[0049] A surface treatment process for glass microbubbles comprises the following steps:

[0050] S1: obtaining a glass microbubble raw material, and performing wet modification to obtain a modified glass microbubble raw material;

[0051] S2: preparing the modified powder and setting it aside for use after the preparation is completed;

[0052] S3: preparing a modified solution and setting it aside for use after the preparation is completed;

[0053] S4: mixing the modified glass microbubble raw material obtained in step S1 with the modified powder obtained in step S2, and adding the modified solution obtained in step S3 after the mixing is completed, so as to complete the preliminary surface treatment of the glass microbubbles;

[0054] S5: After the glass microbubbles that have completed the preliminary surface treatment in step S3 are dispersed and regrouped, the surface treatment process of the glass microbubbles is completed.

[0055] First, the processing of the modified glass microbubble raw material in step S1 includes the following steps:

[0056] Step 1: Soak the glass microbubble raw material in water for 6 hours, with the mass ratio of glass microbubble to water being 1:20. During the soaking process, heat the water to 60°C and keep it warm. During the soaking process, add glycerol at a mass ratio of 0.7% of the water and mix thoroughly. After the soaking is completed, filter and dry the glass microbubble raw material;

[0057] Step 2: Put the glass microbubble raw material processed in step 1 into a container, add an adhesive accounting for 1.6% of the mass of the glass microbubble raw material, mix well and let stand for 45 minutes;

[0058] Step 3: Put the glass microbubble raw material after standing in step 2 into a mixer, add an adhesive accounting for 0.9% of the mass of the glass microbubble raw material, and process it at a medium-low speed for 2.5 minutes to obtain a modified glass microbubble raw material.

[0059] The preparation method of the adhesive is as follows: the raw materials of the adhesive include 22 parts of waterborne polyurethane resin, 17 parts of epoxy resin, 9 parts of di-n-butylamine, 9 parts of catalyst and 6 parts of cross-linking agent.

[0060] Furthermore, the processing method of the adhesive raw material is as follows: weigh water-based polyurethane resin, epoxy resin, di-n-butylamine, catalyst and cross-linking agent as needed, add them into a three-necked flask, vacuum dehydrate at 120°C for 2.5 hours, cool to room temperature after the processing is completed, stand for 45 minutes to wait for the reaction, heat to 65°C after the standing is completed, continue to cool to room temperature, stand for 25 minutes to wait for the reaction, add 6% of the total mass of butanediol, heat to 65°C, continue to stir during the heating process, keep warm for 2.5 hours and then cool to room temperature to obtain the adhesive.

[0061] Furthermore, the catalyst is molybdenum trioxide and the cross-linking agent is trimethoxysilane.

[0062] Furthermore, the preparation method of the modified powder is: selecting the particle size D 50 The polyethylene powder with a size of less than 30 μm is mixed with a brightener accounting for 4% by weight, and then dried, ground and sieved to obtain a modified powder.

[0063] Furthermore, the preparation method of the modified solution is: polypropylene and bromohexane solution are mixed into a flask, the mass ratio of polypropylene to bromohexane solution is 1:10, and a mixed solution is obtained, and then potassium iodide accounting for 6% of the mass of the mixed solution is added, heated to 55°C, and kept warm for 9 hours, and acrylate accounting for 2.5% of the mass of the mixed solution is added, and the mixture is heated to 85°C. The reaction is kept warm for 2.5 hours to obtain a modified solution.

[0064] Furthermore, the mixing method in step S4 is: weigh the modified glass microbubble raw material as needed and add it to the mixing equipment, then add the modified powder accounting for 6% of the modified glass microbubble raw material by weight, and mix and treat it at a medium-low speed in the mixing equipment for 9 minutes, add the modified solution accounting for 5% of the modified glass microbubble raw material by weight, and mix and treat it at a medium-low speed in the mixing equipment for 3 minutes, thereby completing the preliminary surface treatment of the glass microbubbles.

[0065] Furthermore, the dispersion treatment method in step S5 is: spreading the glass microbubbles that have completed the preliminary surface treatment on the bottom of the disperser and treating them at a low speed for 5 minutes. The reaggregation treatment method in step S5 is: adding the glass microbubbles that have completed the first dispersion treatment into a vacuum bag, sealing the vacuum bag and sending it into a vacuum machine, evacuating the vacuum bag and letting it stand for 3 hours. After taking it out, the surface treatment of the glass microbubbles is completed.

[0066] This embodiment also provides a glass microbubble, which is formed by a surface treatment process of the glass microbubble.

[0067] Embodiment 3

[0068] The preparation method of the surface treatment process of glass microbubbles in this embodiment is basically the same as that in Example 1, except that the specific ratios of the raw materials used and the preparation methods of the functional additives used in the two are different. The specific ratios of the raw materials used in the surface treatment process of glass microbubbles in this embodiment and the preparation methods of the functional additives are as follows:

[0069] A surface treatment process for glass microbubbles comprises the following steps:

[0070] S1: obtaining a glass microbubble raw material, and performing wet modification to obtain a modified glass microbubble raw material;

[0071] S2: preparing the modified powder and setting it aside for use after the preparation is completed;

[0072] S3: preparing a modified solution and setting it aside for use after the preparation is completed;

[0073] S4: mixing the modified glass microbubble raw material obtained in step S1 with the modified powder obtained in step S2, and adding the modified solution obtained in step S3 after the mixing is completed, so as to complete the preliminary surface treatment of the glass microbubbles;

[0074] S5: After the glass microbubbles that have completed the preliminary surface treatment in step S3 are dispersed and regrouped, the surface treatment process of the glass microbubbles is completed.

[0075] First, the processing of the modified glass microbubble raw material in step S1 includes the following steps:

[0076] Step 1: Soak the glass microbubble raw material in water for 7 hours, with the mass ratio of glass microbubble to water being 1:20. During the soaking process, heat the water to 70°C and keep it warm. During the soaking process, add glycerol at a mass ratio of 0.8% of the water and mix thoroughly. After the soaking is completed, filter and dry the glass microbubble raw material;

[0077] Step 2: Put the glass microbubble raw material processed in step 1 into a container, add an adhesive accounting for 1.8% of the mass of the glass microbubble raw material, mix well and let stand for 50 minutes;

[0078] Step 3: Put the glass microbubble raw material after standing in step 2 into a mixer, add an adhesive accounting for 1% of the mass of the glass microbubble raw material, and process it at a medium-low speed for 3 minutes to obtain a modified glass microbubble raw material.

[0079] The preparation method of the adhesive is as follows: the raw materials of the adhesive include 25 parts of waterborne polyurethane resin, 20 parts of epoxy resin, 10 parts of di-n-butylamine, 10 parts of catalyst and 8 parts of cross-linking agent.

[0080] Furthermore, the processing method of the adhesive raw material is as follows: weigh water-based polyurethane resin, epoxy resin, di-n-butylamine, catalyst and cross-linking agent as needed, add them into a three-necked flask, vacuum dehydrate at 130°C for 3 hours, cool to room temperature after the treatment, let stand for 50 minutes to wait for the reaction, heat to 70°C after the standing is completed, continue to cool to room temperature, let stand for 30 minutes to wait for the reaction, add 8% of the total mass of butanediol, heat to 70°C, continue to stir during the heating process, keep warm for 3 hours and then cool to room temperature to obtain the adhesive.

[0081] Furthermore, the catalyst is hydrolase, and the cross-linking agent is hexyl orthosilicate.

[0082] Furthermore, the preparation method of the modified powder is: selecting the particle size D 50 The polyethylene powder with a size of less than 30 μm is mixed with a brightener accounting for 5% by weight, and then dried, ground and sieved to obtain a modified powder.

[0083] Furthermore, the preparation method of the modified solution is: mix polypropylene and bromohexane solution into a flask, the mass ratio of polypropylene to bromohexane solution is 1:10, to obtain a mixed solution, then add potassium iodide accounting for 8% of the mass of the mixed solution, heat to 60°C, keep warm for 10 hours, add acrylate accounting for 3% of the mass of the mixed solution, heat to 90°C, keep warm for 3 hours, and obtain the modified solution.

[0084] Furthermore, the mixing method in step S4 is: weigh the modified glass microbubble raw material as needed and add it to the mixing equipment, then add the modified powder accounting for 8% of the modified glass microbubble raw material by weight, and mix it at a medium-low speed for 10 minutes in the mixing equipment, add the modified solution accounting for 6% of the modified glass microbubble raw material by weight, and mix it at a medium-low speed for 5 minutes in the mixing equipment, thereby completing the preliminary surface treatment of the glass microbubbles.

[0085] Furthermore, the dispersion treatment method in step S5 is: spreading the glass microbubbles that have completed the preliminary surface treatment on the bottom of the disperser and treating them at a low speed for 6 minutes. The reaggregation treatment method in step S5 is: adding the glass microbubbles that have completed the first dispersion treatment into a vacuum bag, sealing the vacuum bag and sending it into a vacuum machine, evacuating the vacuum and letting it stand for 4 hours, and completing the surface treatment of the glass microbubbles after taking them out.

[0086] This embodiment also provides a glass microbubble, which is formed by a surface treatment process of the glass microbubble.

[0087] Comparative Example 1: The difference between this comparative example and Example 1 is that this example uses an equal amount of aqueous polyurethane emulsion to replace the functional additive.

[0088] Comparative Example 2: The difference between this comparative example and Example 1 is that this example does not contain a connecting material.

[0089] Comparative Example 3: The difference between this comparative example and Example 1 is that in this example, no isocyanatepropyltriethoxysilane is added when preparing the functional additive.

[0090] Comparative Example 4: The difference between this comparative example and Example 1 is that this example does not contain a functional additive.

[0091] Performance test: The relevant performances of the surface treatment process samples of the glass microbubbles provided in Examples 1-3 and Comparative Examples 1-4 were tested respectively, and the obtained test data are recorded in the following table:

[0092]

[0093] By comparing and analyzing the relevant data in the table, it can be seen that the glass microbubbles prepared by the present invention not only have good fluidity, but also have excellent gloss performance. This shows that the surface treatment process of the glass microbubbles provided by the present invention has a broader market prospect and is more suitable for promotion.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A surface treatment process for glass microbubbles, characterized in that: The following steps are involved: S1: obtaining a glass microbubble raw material, and performing wet modification to obtain a modified glass microbubble raw material; The processing of the modified glass microbubble raw material in step S1 comprises the following steps: Step 1: Soak the glass microbubble raw material in water for 5-7 hours, wherein the mass ratio of the glass microbubble to water is 1:

20. During the soaking process, the water is heated to 50-70°C and kept warm. During the soaking process, glycerin accounting for 0.6-0.8% of the water is added dropwise and mixed thoroughly. After the soaking is completed, the glass microbubble raw material is filtered and dried; Step 2: Put the glass microbubble raw material processed in step 1 into a container, add an adhesive accounting for 1.5-1.8% of the mass of the glass microbubble raw material, mix well and let stand for 40-50 minutes; Step 3: Put the glass microbubble raw material after standing in step 2 into a mixer, add an adhesive accounting for 0.8-1% of the mass of the glass microbubble raw material, and process it at a medium-low speed for 2-3 minutes to obtain a modified glass microbubble raw material; The preparation method of the adhesive is as follows: the raw materials of the adhesive include 20-25 parts of waterborne polyurethane resin, 15-20 parts of epoxy resin, 8-10 parts of di-n-butylamine, 8-10 parts of catalyst and 5-8 parts of cross-linking agent; The processing method of the adhesive raw material is as follows: weigh waterborne polyurethane resin, epoxy resin, di-n-butylamine, catalyst and cross-linking agent as needed, add them into a three-necked flask, vacuum dehydrate at 110-130° C. for 2-3 hours, cool to room temperature after the processing is completed, stand for 40-50 minutes to wait for reaction, heat to 60-70° C. after standing, continue to cool to room temperature, stand for 20-30 minutes to wait for reaction, drop butanediol accounting for 5-8% of the total mass, heat to 60-70° C., stir continuously during the heating process, keep warm for 2-3 hours and then cool to room temperature to obtain the adhesive; S2: preparing the modified powder and setting it aside for use after the preparation is completed; The preparation method of the modified powder is: selecting the particle size D 50 After polyethylene powder with a size of less than 30 μm is mixed with a brightener accounting for 3-5% by weight, it is dried, ground and sieved to obtain a modified powder; S3: preparing a modified solution and setting it aside for use after the preparation is completed; The preparation method of the modified solution is as follows: polypropylene and a bromohexane solution are mixed and added into a flask, wherein the mass ratio of the polypropylene to the bromohexane solution is 1:10, to obtain a mixed solution, and then potassium iodide accounting for 5-8% of the mass of the mixed solution is added, heated to 50-60° C., and kept warm for reaction for 8-10 hours, and acrylic acid ester accounting for 2-3% of the mass of the mixed solution is added, and heated to 80-90° C., and kept warm for reaction for 2-3 hours, to obtain a modified solution; S4: mixing the modified glass microbubble raw material obtained in step S1 with the modified powder obtained in step S2, and adding the modified solution obtained in step S3 after the mixing is completed, so as to complete the preliminary surface treatment of the glass microbubbles; S5: After the glass microbubbles that have completed the preliminary surface treatment in step S3 are dispersed and regrouped, the surface treatment process of the glass microbubbles is completed.

2. The surface treatment process according to claim 1, characterized in that: The catalyst is selected from any one of vanadium pentoxide, molybdenum trioxide and hydrolase, and the cross-linking agent is selected from any one of hexyl orthosilicate and trimethoxysilane.

3. The surface treatment process according to claim 1, characterized in that: The mixing method in step S4 is: weigh the modified glass microbubble raw material as needed and add it to the mixing equipment, then add the modified powder accounting for 5-8% of the modified glass microbubble raw material by weight, and mix it at a medium-low speed in the mixing equipment for 8-10 minutes, add the modified solution accounting for 4-6% of the modified glass microbubble raw material by weight, and mix it at a medium-low speed in the mixing equipment for 2-5 minutes, so as to complete the preliminary surface treatment of the glass microbubbles.

4. The surface treatment process according to claim 1, characterized in that: The dispersion treatment method in step S5 is: spreading the glass microbubbles that have completed the preliminary surface treatment on the bottom of the disperser and treating them at a low speed for 4-6 minutes. The regrouping treatment method in step S5 is: adding the glass microbubbles that have completed the first dispersion treatment into a vacuum bag, sealing the vacuum bag and sending it into a vacuum machine, evacuating the vacuum bag and letting it stand for 2-4 hours, and then taking it out to complete the surface treatment of the glass microbubbles.

5. A glass microbubble, characterized in that: The glass microbubbles are formed by the surface treatment process described in any one of claims 1 to 4.

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