Curable slurry of epoxy resin-polyvinyl butyral composite material and its preparation method

Abstract

This application discloses a curable slurry of epoxy resin-polyvinyl butyral composite material and its preparation method. The curable slurry comprises: component A and component B; component A comprises raw materials in the following mass ratios: epoxy resin: 100; epoxy-based reactive diluent: 0-30; component B comprises raw materials in the following mass ratios: small molecule amine curing agent: 10-50; polymeric amine curing agent: 0-40; polyvinyl butyral: 1-10; aminosilane coupling agent: 0-10. This application requires no additional solvents, is safe and environmentally friendly, and utilizes the good flexibility, tensile strength, and other mechanical properties of polyvinyl butyral, as well as its good compatibility with epoxy resin and its ability to increase the thixotropy of epoxy resin, to improve the shortcomings of epoxy resin, such as high brittleness at low temperatures, easy cracking, and easy sagging during vertical construction. This application has broad applicability to various existing epoxy resins and amine curing agents, and has broad application prospects.

Description

Technical Field

[0001] This application belongs to the field of epoxy resins, specifically relating to a curable slurry of epoxy resin-polyvinyl butyral composite material and its preparation method. Background Technology

[0002] Epoxy resin possesses excellent mechanical properties such as compressive strength, tensile strength, and adhesion, as well as durability properties such as corrosion resistance, hydrolysis resistance, and heat resistance, making it widely used in construction, chemical industry, and shipbuilding. However, epoxy resin has a high glass transition temperature and is relatively brittle at low temperatures, making it prone to cracking and limiting its application in low-temperature environments. In addition, room-temperature curing epoxy resins commonly used in construction engineering for repair, reinforcement, bonding, and corrosion protection have strong sag characteristics before complete curing, making application on vertical surfaces difficult and easily resulting in defects such as thinner tops and thicker bottoms or unevenness.

[0003] Polyvinyl butyral (PVB) has a low glass transition temperature and exhibits good flexibility, tensile strength, adhesive strength, and impact resistance. It also possesses excellent light resistance, water resistance, heat resistance, cold resistance, and film-forming properties. Furthermore, the PVB molecular chain contains numerous polar groups such as acetal, hydroxyl, and ester groups, resulting in good compatibility with epoxy resins. This makes it suitable for addressing the issues of high brittleness and cracking in epoxy resins. Adding PVB to room-temperature curing epoxy resins also thickens and improves rheological properties, giving the epoxy resin slurry thixotropic properties, preventing sagging, and facilitating vertical surface application. In addition, PVB is colorless and transparent, and does not affect the appearance of the epoxy resin.

[0004] However, existing methods for adding polyvinyl butyral to epoxy resin mainly employ the solvent method. This involves dissolving polyvinyl butyral in a solvent to form a solution before adding it to the epoxy resin, or dissolving both polyvinyl butyral and epoxy resin together in a solvent to form a solution, followed by solvent removal during heat curing. This method requires large amounts of organic solvents, necessitating not only high-temperature solvent removal but also additional processes for solvent recovery or harmless disposal. Furthermore, solvent residues can cause environmental pollution and negatively impact the mechanical properties and durability of epoxy resin materials. In addition, the solvent method is unsuitable for applications requiring room temperature curing or open-construction methods.

[0005] Therefore, there is an urgent need for a technology that allows polyvinyl butyral to be added to epoxy resin without solvents and can be cured at room temperature, forming a curable slurry of epoxy resin-polyvinyl butyral composite material that meets application requirements and is safe and environmentally friendly. Summary of the Invention

[0006] In view of the shortcomings or deficiencies of the prior art, the technical problem to be solved by this application is to provide a curable slurry of epoxy resin-polyvinyl butyral composite material and its preparation method.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0008] This application discloses a curable slurry of epoxy resin-polyvinyl butyral composite material, comprising: component A and component B; component A comprises raw materials in the following mass ratios: epoxy resin: 100; epoxy-based reactive diluent: 0-30; component B comprises raw materials in the following mass ratios: small molecule amine curing agent: 10-50; polymeric amine curing agent: 0-40; polyvinyl butyral: 1-10; aminosilane coupling agent: 0-10.

[0009] Specifically, in the aforementioned curable slurry, the epoxy resin is a solvent-free epoxy resin with a functionality of not less than 2.

[0010] Specifically, in the aforementioned curable slurry, the epoxy resin comprises one or more of the following substances: bisphenol A glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted bisphenol A glycidyl ether, bisphenol F glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted bisphenol F glycidyl ether, bisphenol S glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted bisphenol S glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted hydroquinone diglycidyl ether, polyphenol glycidyl ether... Glyceryl ether, linear phenolic resin glyceryl ether, aliphatic polyol glyceryl ether, aliphatic polyacid glyceryl ester, glyceryl amine epoxy resin with a functionality of not less than 2, alicyclic epoxy resin with a functionality of not less than 2, epoxidized olefin with a functionality of not less than 2, triglyceryl isocyanurate, hydantoin epoxy resin with a functionality of not less than 2, terminal epoxy polyether or polyester with a functionality of not less than 2, and epoxy polysiloxane with a functionality of not less than 2.

[0011] Specifically, in the aforementioned curable slurry, the epoxy-based reactive diluent comprises one or more of the following substances: glycidyl ether of a polyol with no more than 10 carbon atoms and a functionality of no less than 2; polyethylene glycol with a viscosity of no more than 300 mPa·s at 25°C; polypropylene glycol diglycidyl ether with a viscosity of no more than 300 mPa·s at 25°C; organosilicon glycidyl ether with a viscosity of no more than 300 mPa·s at 25°C and a functionality of no less than 2; and di(2-epoxypropyl) ether.

[0012] Specifically, in the aforementioned curable slurry, the small molecule amine curing agent includes one or more of the following substances: a monoamine with 2 to 18 carbon atoms and containing one primary amine group, and a polyamine with 2 to 18 carbon atoms and containing no less than two tertiary amine groups.

[0013] Specifically, in the aforementioned curable slurry, the polymeric amine curing agent includes one or more of the following substances in combination: amino silicone oil, solvent-free polyethyleneimine, solvent-free aminosilane coupling agent condensate, and polyamide with a freezing point not exceeding 40°C.

[0014] Specifically, in the aforementioned curable slurry, the polyvinyl butyral comprises one or more of the following substances: polyvinyl butyral with a molecular weight of 5,000 to 250,000; the polyvinyl butyral is in powder, fine granule, or flake form.

[0015] Specifically, in the aforementioned curable slurry, the aminosilane coupling agent comprises: [a specific type of coupling agent with the structural formula R]. 1 R 2 x Si(OR 3 ) 3-x Silane coupling agents; wherein, R 1 It is a hydrocarbon group with 2 to 12 carbon atoms containing one primary amino group, or R 1 It is a hydrocarbon group with 2 to 12 carbon atoms and containing at least two tertiary or fewer amino groups substituted; R 2 and R 3 All are hydrocarbon groups with 1 to 4 carbon atoms; the range of x is 0 ≤ x ≤ 2.

[0016] This application also proposes a method for preparing a curable slurry of epoxy resin-polyvinyl butyral composite material, comprising the following steps:

[0017] Weigh out components A and B separately; component A includes the following raw materials in the following mass ratios: epoxy resin 100; epoxy-based reactive diluent 0-30; component B includes the following raw materials in the following mass ratios: small molecule amine curing agent 10-50; polymeric amine curing agent 0-40; polyvinyl butyral 1-10; aminosilane coupling agent 0-10.

[0018] Prepare component A; when component A contains more than one raw material, mix all the raw materials of component A and stir thoroughly to obtain component A;

[0019] Prepare component B by mixing the small molecule amine curing agent and the polyvinyl butyral and stirring thoroughly until the polyvinyl butyral is fully dissolved to form a first transparent solution; when the amount of the aminosilane coupling agent is not zero, mix the aminosilane coupling agent with the small molecule amine curing agent and the polyvinyl butyral and stir thoroughly until the polyvinyl butyral is fully dissolved to form a second transparent solution; when the amount of the polymer amine curing agent is not zero, mix the polymer amine curing agent with the first transparent solution or the second transparent solution and stir thoroughly to obtain component B.

[0020] The components A and B are mixed and stirred thoroughly to obtain a cured slurry of epoxy resin-polyvinyl butyral composite material.

[0021] Optionally, in the above preparation method, the preparation process of component A is supplemented by heating before mixing with component B, and the heating temperature is not higher than the deterioration temperature of the raw materials used; and / or, the polyvinyl butyral is ground and pulverized before mixing; and / or, the polyvinyl butyral is supplemented by heating during the mixing process, and the heating temperature is not higher than the deterioration temperature of the raw materials used; and / or, the polyvinyl butyral is supplemented by ultrasound during the mixing process.

[0022] Optionally, in the above preparation method, if the epoxy resin or polymer amine curing agent has too high viscosity, is solid at room temperature, or dissolves slowly, making it difficult to stir evenly in the mixing step, then heating is applied during mixing, and the heating temperature is not higher than the deterioration temperature of the raw materials used.

[0023] Optionally, in the above preparation method, if the viscosity of component A is too high or solidifies at room temperature, making it difficult to mix evenly with component B, the mixing temperature is adjusted to ensure that component A can be easily mixed evenly with component B and that the reduction in curing time of the resulting curable slurry does not affect operability.

[0024] Compared with the prior art, this application has the following technical effects:

[0025] (1) In the curable slurry of epoxy resin-polyvinyl butyral composite material of this application, polyvinyl butyral is introduced into epoxy resin. The good flexibility, tensile strength, adhesive strength and impact strength of polyvinyl butyral, as well as the characteristics of being rich in polar groups, having good compatibility with epoxy resin, and increasing the thixotropy of epoxy resin, improve the shortcomings of epoxy resin in low temperature environment, such as large brittleness, easy cracking and strong sag in vertical construction. It meets the needs of low temperature application and vertical construction of epoxy resin materials, improves the mechanical properties and durability of epoxy resin without affecting the appearance of epoxy resin, and expands its application range.

[0026] (2) In the curable slurry of the epoxy resin-polyvinyl butyral composite material of this application, epoxy resin cured with amine curing agent is selected. The epoxy resin-amine alternating polymerization is carried out based on the addition reaction of epoxy-primary amine group / secondary amine group. The reaction can be carried out spontaneously at room temperature. There is an induction period in the early stage of the reaction with slow viscosity growth, and then the reaction is rapid and uniform to achieve a high conversion rate. It can be cured at room temperature or heated, and has a wide range of applications. The reaction can spontaneously achieve a high conversion rate. By adjusting the ratio of epoxy-primary amine group / secondary amine group, it is possible to achieve almost no organic amine residue, avoiding the continuous slow release of toxic and volatile organic amines into the environment after the epoxy resin is cured, which is safe and environmentally friendly.

[0027] (3) In the curable slurry of the epoxy resin-polyvinyl butyral composite material of this application, epoxy resin cured with amine curing agent is selected. At the same time, taking advantage of the characteristic that polyvinyl alcohol is soluble in small molecule organic amine, the small molecule amine curing agent is used as a solvent for polyvinyl butyral to introduce it into the epoxy resin. Unlike the currently commonly used method of adding epoxy resin by dissolving polyvinyl butyral with an additional solvent, this application does not require the addition of any additional solvent. Therefore, it does not require high temperature solvent removal, additional process recovery or harmless discharge of solvent, and there is no solvent residue problem. It is safe, energy-saving and environmentally friendly, and can also avoid the adverse effects of solvent residue on the mechanical properties and durability of epoxy resin materials. It is especially suitable for applications such as room temperature curing and open construction.

[0028] (4) The curable slurry of the epoxy resin-polyvinyl butyral composite material of this application is modified based on existing epoxy resin and has wide applicability to a variety of existing epoxy resins and amine curing agents. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise specified, all raw materials used in the following examples and comparative examples are commercially available industrial-grade chemical raw materials.

[0031] Example 1

[0032] Weigh out the following raw materials: 100g epoxy resin 6002; 50g small molecule amine curing agent 593; 10g polyvinyl butyral TB-14.

[0033] Epoxy resin 6002 is component A.

[0034] Mix curing agent 593 and TB-14 and stir thoroughly until TB-14 is fully dissolved to form a transparent solution, thus obtaining component B.

[0035] Mix components A and B thoroughly to obtain a curable slurry of epoxy resin-polyvinyl butyral composite material.

[0036] Example 2

[0037] Weigh out the following raw materials: 90g epoxy resin E-51; 10g triglycidyl isocyanurate; 15g diethylenetriamine, a small molecule amine curing agent; 5g polyamide 651, a polymer amine curing agent; 5g polyethyleneimine (600 molecular weight), a polymer amine curing agent; and 1g polyvinyl butyral TB-14.

[0038] E51 and triglycidyl isocyanurate were mixed and stirred thoroughly to obtain component A. During the mixing process, the mixture was heated to 70±10℃, and the obtained component A was kept at 50±5℃.

[0039] Diethylenetriamine and TB-14 were mixed and stirred thoroughly until TB-14 was fully dissolved to form a transparent solution; then it was mixed with polyamide 651 and polyethyleneimine (600 molecular weight) and stirred thoroughly to obtain component B. During the mixing process, the mixture was heated to 55±5℃.

[0040] Mix components A and B thoroughly to obtain a curable slurry of epoxy resin-polyvinyl butyral composite material.

[0041] Example 3

[0042] Weigh out the following raw materials: 100g epoxy resin E51; 30g epoxy reactive diluent 669 (ethylene glycol diglycidyl ether); 10g small molecule amine curing agent T-31; 40g polymer amine curing agent polyamide 650; 1g polyvinyl butyral TB-17; 10g aminosilane coupling agent KH-550 [γ-aminopropyltriethoxysilane].

[0043] Mix E51 and diluent 669 and stir thoroughly to obtain component A.

[0044] Mix T-31, TB-17 and KH-550 and stir thoroughly until TB-17 is fully dissolved to form a transparent solution. Then mix it with polyamide 650 and stir thoroughly to obtain component B.

[0045] Mix components A and B thoroughly to obtain a curable slurry of epoxy resin-polyvinyl butyral composite material.

[0046] Example 4

[0047] Weigh out the following raw materials: 50g epoxy resin E-51, 50g epoxy resin E-12; 30g epoxy reactive diluent 750 (butanediol diglycidyl ether); 20g small molecule amine curing agent 593; 20g polymer amine curing agent polyamide 651; 4g polyvinyl butyral TB-14; 10g aminosilane coupling agent KH-792 [N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane].

[0048] Mix E51, E-12 and diluent 750 and stir thoroughly to obtain component A. During the mixing process, heat to 70±10℃.

[0049] Mix curing agent 593, TB-14 and KH-792 and stir thoroughly until TB-17 is fully dissolved to form a transparent solution. Then mix it with polyamide 651 and stir thoroughly to obtain component B.

[0050] Mix components A and B thoroughly to obtain a curable slurry of epoxy resin-polyvinyl butyral composite material.

[0051] Example 5

[0052] Weigh out the following raw materials: 100g epoxy resin E51; 30g epoxy reactive diluent 749 (neopentyl glycol diglycidyl ether); 30g small molecule amine curing agent T-31; 8g polyvinyl butyral TB-12; 10g aminosilane coupling agent KH-792 {N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane}.

[0053] Mix E51 and diluent 749 and stir thoroughly to obtain component A.

[0054] Mix T-31, TB-12 and KH-792 and stir thoroughly until TB-12 is fully dissolved to form a transparent solution, thus obtaining component B.

[0055] Mix components A and B thoroughly to obtain a curable slurry of epoxy resin-polyvinyl butyral composite material.

[0056] Example 6

[0057] Weigh out the following raw materials: 100g epoxy resin 6002; 20g epoxy reactive diluent 503 (1,6-hexanediol diglycidyl ether); 10g epoxy reactive diluent epoxy double-ended [1,3-bis(3-glycidyl ether oxypropyl)tetramethyldisiloxane]; 35g small molecule amine curing agent T-31; 2g polyvinyl butyral TB-17; 3g aminosilane coupling agent KH-792 [N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane]; 7g aminosilane coupling agent KH-550 [γ-aminopropyltriethoxysilane].

[0058] Component A is obtained by mixing epoxy resin 6002, diluent 503 and epoxy double end cap and stirring thoroughly.

[0059] Mix T-31, TB-17, KH-792, and KH-550 and stir thoroughly until TB-17 is fully dissolved to form a transparent solution, thus obtaining component B.

[0060] Mix components A and B thoroughly to obtain a curable slurry of epoxy resin-polyvinyl butyral composite material.

[0061] Comparative Example 1

[0062] Weigh out the following raw materials: 100g epoxy resin 6002; 50g small molecule amine curing agent 593.

[0063] Mix the two together and stir thoroughly to obtain an epoxy resin curable slurry.

[0064] Comparative Example 2

[0065] Weigh out the following raw materials: 100g epoxy resin E51; 10g small molecule amine curing agent T-31; 40g polymer amine curing agent polyamide 650; 30g epoxy reactive diluent 669 (ethylene glycol diglycidyl ether); 10g aminosilane coupling agent KH-550 [γ-aminopropyltriethoxysilane].

[0066] The above raw materials are mixed and stirred thoroughly to obtain an epoxy resin curable slurry.

[0067] Comparative Example 3

[0068] Weigh out the following raw materials: 100g epoxy resin E51; 30g small molecule amine curing agent T-31; 30g epoxy reactive diluent 749 (neopentyl glycol diglycidyl ether); 10g aminosilane coupling agent KH-792 {N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane}.

[0069] The above raw materials are mixed and stirred thoroughly to obtain an epoxy resin curable slurry.

[0070] The curing conditions and some mechanical properties of the curable slurries described in Examples 1-6 and Comparative Examples 1-3 are shown in Table 1.

[0071] Table 1. Curing conditions and some mechanical properties after curing of the curable slurries in Examples 1-6 and Comparative Examples 1-3.

[0072]

[0073] The curable slurry of epoxy resin-polyvinyl butyral composite material proposed in this application introduces polyvinyl butyral into epoxy resin. Utilizing the good flexibility, tensile strength, and other mechanical properties of polyvinyl butyral, as well as its good compatibility with epoxy resin and its ability to increase the thixotropy of epoxy resin, this improves the shortcomings of epoxy resin, such as high brittleness and easy cracking at low temperatures. Compared with epoxy resin of the same proportion without polyvinyl butyral, whether cured directly as pure slurry, cured after adding fillers, or made into fiberglass, it exhibits higher low-temperature compressive strength and flexural strength, meeting the application requirements of epoxy resin materials in low-temperature environments. This improves the mechanical properties and durability of epoxy resin without affecting its appearance, thus expanding its application range.

[0074] In the curable slurry of the epoxy resin-polyvinyl butyral composite material of this application, small molecule amine curing agents and aminosilane coupling agents are good solvents for polyvinyl butyral, forming a homogeneous and transparent solution. Epoxy resin, polymeric amine curing agents, and epoxy-based reactive diluents cannot directly dissolve polyvinyl butyral; they are only used to dilute the above solution and disperse the polyvinyl butyral within it, causing a small portion of the polyvinyl butyral to precipitate and form a thixotropic gel. Therefore, the curable slurry of the epoxy resin-polyvinyl butyral composite material exhibits thixotropic properties even before curing. The epoxy resin undergoes denaturation, and as the small-molecule amine curing agent, which acts as a solvent for polyvinyl butyral, is continuously consumed by the polymerization reaction of the epoxy resin, polyvinyl butyral is continuously released in situ, gradually enhancing its thickening properties. When the slurry is thickly applied to the vertical surface, it can effectively counteract the viscosity decrease caused by the exothermic reaction and temperature rise, ensuring that the slurry remains non-sagging during the curing process. This solves the problem of strong sagging in ordinary epoxy resin vertical surface construction, meets the application requirements of epoxy resin materials in vertical surface construction, improves the smoothness, uniformity, and other appearance properties after curing, and expands the application range of epoxy resin materials.

[0075] In the preparation method of the curable slurry of epoxy resin-polyvinyl butyral composite material of this application, the small molecule amine curing agent of epoxy resin is also used as a solvent of polyvinyl butyral and introduced into the epoxy resin, thereby avoiding the addition of additional solvent, eliminating the need for high-temperature solvent removal and additional process recovery or harmless discharge of solvent, and eliminating the problem of solvent residue. It is safe, energy-saving and environmentally friendly, and can also avoid the adverse effects of solvent residue on the mechanical properties and durability of epoxy resin materials. The organic amine itself participates in the reaction as an epoxy resin curing agent and can achieve a high conversion rate. Under appropriate ratio, it can basically achieve no organic amine residue, which is also safe and environmentally friendly. Therefore, it is particularly suitable for application scenarios such as room temperature curing and open construction.

[0076] The curable slurry of the epoxy resin-polyvinyl butyral composite material of this application is modified based on existing epoxy resins and has broad applicability to a variety of existing epoxy resins and amine curing agents.

[0077] The curable slurry of the epoxy resin-polyvinyl butyral composite material of this application can be used alone as an adhesive and resin casting, or it can be combined with fillers and fiber reinforcement materials to make coatings, polymer mortars, and fiberglass materials. It is widely applicable to the repair, reinforcement, corrosion protection, and aesthetic enhancement of buildings, waterways, roads and bridges, and has broad application prospects.

[0078] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. The preferred embodiments have been described in detail. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A curable slurry of epoxy resin-polyvinyl butyral composite material, characterized in that, include: Component A and Component B; Component A comprises the following raw materials in the following mass ratios: Epoxy resin: 100; Epoxy reactive diluent: 0~30; Component B comprises the following raw materials in the following mass ratios: Small molecule amine curing agents: 10~50; Polymer amine curing agent: 0~40; Polyvinyl butyral: 1~10; Aminosilane coupling agent: 0~10; The small molecule amine curing agent includes one or more of the following substances: a monoamine with 2 to 18 carbon atoms and containing one primary amine group, and a polyamine with 2 to 18 carbon atoms and containing no less than two tertiary amine groups; Small molecule amine curing agents and aminosilane coupling agents are good solvents for polyvinyl butyral, forming a homogeneous and transparent solution.

2. The curable slurry of the epoxy resin-polyvinyl butyral composite material according to claim 1, characterized in that, The epoxy resin is a solvent-free epoxy resin with a functionality of not less than 2.

3. The curable slurry of the epoxy resin-polyvinyl butyral composite material according to claim 1 or 2, characterized in that, The epoxy resin comprises one or more of the following substances: bisphenol A glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted bisphenol A glycidyl ether, bisphenol F glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted bisphenol F glycidyl ether, bisphenol S glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted bisphenol S glycidyl ether, hydrogenated or halogenated or hydrocarbon-substituted hydroquinone diglycidyl ether, linear phenolic resin glycidyl ether, aliphatic polyol glycidyl ether, aliphatic polyacid glycidyl ester, glycidylamine type epoxy resin with a functionality of not less than 2, alicyclic epoxy resin with a functionality of not less than 2, epoxidized olefin with a functionality of not less than 2, triglycidyl isocyanurate, hydantoin epoxy resin with a functionality of not less than 2, terminal epoxy polyether or polyester with a functionality of not less than 2, and epoxy polysiloxane with a functionality of not less than 2.

4. The curable slurry of the epoxy resin-polyvinyl butyral composite material according to claim 1, characterized in that, The epoxy-based reactive diluent includes one or more of the following substances: glycidyl ether of a polyol with no more than 10 carbon atoms and a functionality of no less than 2; polypropylene glycol diglycidyl ether with a viscosity of no more than 300 mPa·s; organosilicon glycidyl ether with a viscosity of no more than 300 mPa·s and a functionality of no less than 2; and di(2-epoxypropyl) ether.

5. The curable slurry of the epoxy resin-polyvinyl butyral composite material according to claim 1, characterized in that, The polymeric amine curing agent includes one or more of the following substances: amino silicone oil, solvent-free polyethyleneimine, solvent-free aminosilane coupling agent condensate, and polyamide with a freezing point not exceeding 40°C.

6. The curable slurry of the epoxy resin-polyvinyl butyral composite material according to claim 1, characterized in that, The polyvinyl butyral includes one or more of the following substances: polyvinyl butyral with a molecular weight of 5,000 to 250,000; the polyvinyl butyral is in the form of powder, fine granules, or flakes.

7. The curable slurry of the epoxy resin-polyvinyl butyral composite material according to claim 1, characterized in that, The aminosilane coupling agent comprises: a structure with the formula R 1 R 2 x Si(OR 3 ) 3-x Silane coupling agents; wherein, R 1 It is a hydrocarbon group with 2 to 12 carbon atoms containing one primary amine group, or R 1 It is a hydrocarbon group with 2 to 12 carbon atoms and containing no less than two tertiary amino groups substituted; R 2 and R 3 All are hydrocarbon groups with 1 to 4 carbon atoms; The range of x is 0 ≤ x ≤ 2.

8. The method for preparing the curable slurry of the epoxy resin-polyvinyl butyral composite material according to any one of claims 1 to 7, characterized in that, Includes the following steps: Weigh out components A and B separately; component A includes the following raw materials in the following mass ratios: epoxy resin 100; epoxy-based reactive diluent 0~30; component B includes the following raw materials in the following mass ratios: small molecule amine curing agent 10~50; polymeric amine curing agent 0~40; polyvinyl butyral 1~10; aminosilane coupling agent 0~10. Prepare component A; when component A contains more than one raw material, mix all the raw materials of component A and stir thoroughly to obtain component A; Prepare component B by mixing the small molecule amine curing agent and the polyvinyl butyral and stirring thoroughly until the polyvinyl butyral is fully dissolved to form a first transparent solution; when the amount of the aminosilane coupling agent is not zero, mix the aminosilane coupling agent with the small molecule amine curing agent and the polyvinyl butyral and stir thoroughly until the polyvinyl butyral is fully dissolved to form a second transparent solution; when the amount of the polymer amine curing agent is not zero, mix the polymer amine curing agent with the first transparent solution or the second transparent solution and stir thoroughly to obtain component B. The components A and B are mixed and stirred thoroughly to obtain a cured slurry of epoxy resin-polyvinyl butyral composite material.

9. The preparation method according to claim 8, characterized in that, The preparation process of component A involves heating before mixing it with component B; And / or, the polyvinyl butyral is ground or pulverized before mixing; And / or, the polyvinyl butyral is heated during the mixing process; And / or, the polyvinyl butyral is subjected to ultrasound during the mixing process.

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