A glass fiber sizing and method of making, products and uses thereof

Abstract

The application provides a glass fiber sizing agent and a preparation method and use thereof. The sizing agent comprises 0.02%-0.5% of a pH value regulator, 0.1%-1.5% of a silane coupling agent, 0%-7.0% of a first film forming agent, 0.5%-4.0% of a second film forming agent, 0.02%-1.0% of a water resistance agent, 0.05%-0.8% of a lubricant, 0.01%-0.5% of an antistatic agent, and the rest is water. The glass fiber sizing agent can effectively reduce the glass fiber abrasion and broken filament, has good smoothness, high starting rate, excellent bundle property, slip property and antistatic property, has less hairiness during use, and the glass fibers are uniformly dispersed and distributed; the molding fluidity is excellent, the resin compatibility is good, the obtained composite material product has excellent appearance effect and mechanical property, can improve the interface bonding density and water resistance of the composite material, and has the advantages of reducing the generation of pores and bubbles during the water boiling process and the like.

Description

A glass fiber impregnating agent, its preparation method, product and uses Technical Field

[0001] This application belongs to the field of glass fiber sizing agent technology, and particularly relates to a glass fiber sizing agent and its preparation method, product and use, specifically a high water resistance glass fiber sizing agent for SMC and its preparation method, product and use. Background Technology

[0002] SMC composite materials have advantages such as being lightweight, high-strength, corrosion-resistant, low-cost, easy to manufacture, highly designable, aesthetically pleasing, and comfortable, and have been widely used in various industries in recent years.

[0003] With the continuous improvement of production technology, the application of SMC molded products has gradually expanded from industrial products to home furnishings, becoming increasingly integrated into our daily lives. Examples include SMC integrated bathroom fixtures, doors and windows, ceilings, and wall panels. As living standards continue to improve, people are placing higher demands on the durability, aesthetics, and various special properties of SMC home furnishing products, especially in products such as bathtubs, sinks, waterproof panels, and water tanks, which are all developing towards high performance.

[0004] However, while products such as bathtubs, sinks, waterproof panels, and water tanks manufactured using SMC molding technology offer excellent aesthetics and numerous advantages in dimensional stability and ease of installation, their water resistance is a weakness. After a period of use, products in prolonged contact with liquid solutions gradually lose their surface appearance, developing defects such as yellowing, pores, and blistering. Simultaneously, their mechanical strength rapidly declines, with the problem becoming even more pronounced in prolonged contact with hot water solutions.

[0005] SMC products are mainly molded from glass fiber reinforced unsaturated polyester resin materials. The main reasons for the above problems are, on the one hand, the weather resistance of the SMC resin paste system itself; on the other hand, they are also related to the water resistance of the glass fiber sizing agent, as well as the compatibility, interfacial bonding, and interfacial density of the glass fiber sizing agent and the water-resistant unsaturated polyester resin used by the customer.

[0006] Therefore, it is necessary to study a glass fiber impregnating agent that can both guarantee the mechanical and surface properties of the product and significantly improve water resistance. Summary of the Invention

[0007] This application aims to provide a glass fiber sizing agent. Glass fibers coated with this sizing agent can alter the physical and chemical properties of the glass fiber surface, effectively improving the water resistance of the glass fiber and enhancing its compatibility with a water-resistant unsaturated polyester resin matrix, thus extending its service life. Water-resistant products (such as SMC molded products) made using the sizing agent of this application exhibit excellent water resistance, minimal fiber hairiness, uniform glass fiber distribution, and high mechanical properties.

[0008] According to a first aspect of this application, a glass fiber impregnating agent is provided, comprising the following components, the contents of which are expressed as a percentage by mass as follows:

[0009]

[0010]

[0011] Wherein, the first film-forming agent is polyvinyl acetate, the second film-forming agent is epoxy resin, the mass ratio of the first film-forming agent to the second film-forming agent is 1:2-14:1, and the water-resistant agent is a phosphate ester water-resistant agent.

[0012] Preferably, the silane coupling agent is a methacryloxysilane coupling agent and / or an epoxysilane coupling agent.

[0013] Preferably, the polyvinyl acetate is acrylic acid-modified polyvinyl acetate and / or acetal-modified polyvinyl acetate.

[0014] Preferably, the epoxy resin is a polyurethane-modified epoxy resin and / or a dimer acid-modified epoxy resin.

[0015] Preferably, the lubricant is a nonionic lubricant and / or an ionic lubricant.

[0016] Preferably, the nonionic lubricant is emulsified mineral oil and / or polyoxyethylene derivatives; the ionic lubricant is a fatty amine lubricant and / or a polyamide salt lubricant.

[0017] Preferably, the antistatic agent is an ionic antistatic agent, and the pH adjuster is an acidic pH adjuster.

[0018] Preferably, the ionic antistatic agent is a quaternary ammonium salt antistatic agent and / or a nitrate antistatic agent.

[0019] Preferably, the phosphate ester water-resistant agent is an alkyl phosphate ester water-resistant agent and / or an epoxy phosphate ester water-resistant agent.

[0020] According to a second aspect of this application, a method for preparing a glass fiber impregnating agent is provided, comprising the following steps:

[0021] After adding the pH adjuster to water and stirring until homogeneous, add the silane coupling agent and stir until homogeneous to obtain a solution containing the silane coupling agent.

[0022] The first film-forming agent, the second film-forming agent, the water-resistant agent, the lubricant, the antistatic agent, and the solution containing the silane coupling agent, which are diluted with water respectively, are mixed and stirred evenly to obtain the glass fiber impregnating agent.

[0023] According to a third aspect of this application, a glass fiber product produced by coating with the aforementioned glass fiber sizing agent is provided.

[0024] According to a fourth aspect of this application, an application of a glass fiber impregnating agent in water-resistant articles is provided.

[0025] Compared with the prior art, the advantages of this application include:

[0026] First, this application optimizes the compounding by using suitable silane coupling agents, polyvinyl acetate, epoxy resin, water-resistant agents, lubricants, antistatic agents, and pH adjusters. The sizing agent has a high effective utilization rate, and the glass fiber is endowed with excellent wet lubricity during the production process, which effectively reduces wear and fiber breakage during the production process, resulting in better production smoothness and higher uptime.

[0027] Second, the glass fibers produced by coating with the sizing agent provided in this application have excellent bundle properties, smoothness and antistatic properties, and have less fuzz during cutting and use, and the glass fibers are dispersed and evenly distributed.

[0028] Third, the glass fibers produced using the impregnating agent provided in this application have excellent molding fluidity and good compatibility with resin, and the resulting composite material products have excellent appearance and mechanical properties.

[0029] Fourth, the water-resistant agent and film-forming agent in the impregnating agent provided in this application can effectively promote the interfacial reaction between the organic matter on the glass fiber surface and the SMC unsaturated polyester resin, form strong chemical bonds with the resin, improve the interfacial bonding density and water resistance, and reduce the generation of pores and bubbles during boiling. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0031] In some optional embodiments, a glass fiber impregnating agent includes a pH adjuster, a silane coupling agent, a first film-forming agent, a second film-forming agent, a lubricant, a water-resistant agent, an antistatic agent, and water, the contents of each component being expressed as a percentage by mass as follows:

[0032]

[0033] Wherein, the first film-forming agent is polyvinyl acetate, the second film-forming agent is epoxy resin, the mass ratio of the first film-forming agent to the second film-forming agent is 1:2-14:1, and the water-resistant agent is a phosphate ester water-resistant agent.

[0034] In some optional embodiments, a glass fiber impregnating agent includes a pH adjuster, a silane coupling agent, a first film-forming agent, a second film-forming agent, a lubricant, a water-resistant agent, an antistatic agent, and water, the contents of each component being expressed as a percentage by mass as follows:

[0035]

[0036]

[0037] Wherein, the first film-forming agent is polyvinyl acetate, the second film-forming agent is epoxy resin, the mass ratio of the first film-forming agent to the second film-forming agent is 1:2-14:1, and the water-resistant agent is a phosphate ester water-resistant agent.

[0038] In some optional embodiments, a glass fiber impregnating agent includes a pH adjuster, a silane coupling agent, a first film-forming agent, a second film-forming agent, a lubricant, a water-resistant agent, an antistatic agent, and water, the contents of each component being expressed as a percentage by mass as follows:

[0039]

[0040] Wherein, the first film-forming agent is polyvinyl acetate, the second film-forming agent is epoxy resin, the mass ratio of the first film-forming agent to the second film-forming agent is 1:2-14:1, and the water-resistant agent is a phosphate ester water-resistant agent.

[0041] In this application, the contents of pH adjuster, silane coupling agent, lubricant, water-resistant agent, film-forming agent, and antistatic agent refer to the percentage of the solid mass of each component to the total mass of the wetting agent.

[0042] In this application, the silane coupling agent can repair microcrack defects that occur in glass fibers during the production process and serves as a bridge between inorganic glass fibers and organic polymers, making it an important component of the sizing agent. The surface of glass fibers is rich in hydrophilic hydroxyl groups, while the film-forming agent is hydrophobic. The silane coupling agent tightly bonds the glass fibers and the film-forming agent through physicochemical interactions, achieving good interfacial bonding. Furthermore, the choice of silane coupling agent is crucial in affecting the strength of the glass fibers and the strength of glass fiber-reinforced products. The proportion of silane coupling agent used must be controlled within a reasonable range. Excessive use will lead to a yellowish tint in the glass fibers, increased hardness and brittleness of the yarn, and increased fuzzing during production and use; insufficient use will result in inadequate coupling, insufficient interfacial bonding, and a decrease in the overall mechanical properties of the composite material. The content of the silane coupling agent is 0.1%-1.5%, preferably 0.3%-1.0%.

[0043] In some optional embodiments, the silane coupling agent is a methacryloxysilane coupling agent and / or an epoxysilane coupling agent. These silane coupling agents, in combination with the film-forming agents and water-resistant agents provided in this application, can effectively improve the bonding between glass fiber and the resin substrate, giving the glass fiber reinforced composite material better mechanical properties and water resistance.

[0044] In some optional embodiments, the methacryloyloxysilane is methacryloyloxypropyltrimethoxysilane, and the epoxysilane is 3-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0045] In this application, the film-forming agent, as a crucial component of the glass fiber sizing agent, plays a decisive role in the production, processing, and performance of glass fibers. It protects the glass fibers from damage, improves their bundle structure, and enhances their compatibility with the matrix resin. Therefore, selecting a suitable film-forming agent ensures both the bundle structure of the glass fibers and smooth operation in subsequent applications, as well as uniform mixing and complete interfacial bonding between the glass fibers and the matrix resin, thereby improving the mechanical and other superior properties of the composite material product. This application employs two film-forming agents: polyvinyl acetate as the first film-forming agent and epoxy resin as the second. The content of the first and second film-forming agents in this application is the mass percentage of their solid components relative to the total mass of the sizing agent. In preparing the sizing agent, the first and second film-forming agents can be independently dissolved in water to prepare a first film-forming agent emulsion and a second film-forming agent emulsion, respectively. The first and second film-forming agents are then used in the form of the first film-forming agent emulsion and the second film-forming agent emulsion, respectively, to prepare the sizing agent. Meanwhile, the amount of film-forming agent needs to be controlled within a suitable range. Excessive use of film-forming agent can easily lead to poor fiber opening performance of glass fibers in the resin, and also affect resin impregnation, resulting in a decrease in the mechanical properties of the composite material. Insufficient use of film-forming agent will result in the inability to impart good bundle properties to the glass fibers, leading to more fuzz, thereby affecting the smoothness of subsequent composite material processing and the interfacial bonding performance between the glass fibers and SMC resin. In this application, the content of the first film-forming agent is 2.0%-7.0%, preferably 3.0%-6.0%, and more preferably 3.0%-4.5%. In this application, the content of the second film-forming agent is 0.5%-4.0%, preferably 1.0%-3.0%, and more preferably 2.0%-3.0%.

[0046] In some optional embodiments, the polyvinyl acetate is acrylic-modified polyvinyl acetate and / or acetal-modified polyvinyl acetate.

[0047] In some alternative embodiments, the epoxy resin is a polyurethane-modified epoxy resin and / or a dimer acid-modified epoxy resin.

[0048] In some optional embodiments, the mass ratio of polyvinyl acetate to epoxy resin is 1:2-14:1, preferably 1:1-6:1. Exemplary examples include mass ratios of 1:1, 2:1, 3:1, 4:1, 5:1, and 6:1. The inventors have discovered that when the mass ratio of polyvinyl acetate to epoxy resin is 1:2-14:1, the bundle properties, abrasion resistance, flowability, and resin compatibility of the glass fiber can be well guaranteed, thereby ensuring the processability and excellent mechanical properties of SMC products.

[0049] In this application, the water-resistant agent is a phosphate ester-based water-resistant agent. The functional groups of phosphate ester-based water-resistant agents impart hydrophobicity to the glass fiber surface through a chemical reaction. When used in appropriate amounts, they form strong chemical bonds with the resin, increasing interfacial bonding density and reducing the generation of pores and bubbles during boiling. Studies have found that the addition of the water-resistant agent to this wetting agent system significantly improves the water resistance and mechanical properties of SMC molded products. This indicates that the water-resistant agent in this application not only enhances the water resistance of the glass fiber itself but also improves the interfacial bonding between the glass fiber and the SMC resin. The content of the water-resistant agent is 0.02%-1.0%, preferably 0.05%-0.7%, or 0.2%-0.6%.

[0050] In some optional embodiments, the phosphate ester water-resistant agent is an alkyl phosphate ester water-resistant agent and / or an epoxy phosphate ester water-resistant agent. Alkyl phosphate ester water-resistant agents and epoxy phosphate ester water-resistant agents can further improve the water resistance and mechanical properties of fiberglass products. The water resistance and mechanical properties of the fiberglass products are optimal when the phosphate ester water-resistant agent is a mixture of alkyl phosphate ester water-resistant agents and epoxy phosphate ester water-resistant agents, and the mass ratio of alkyl phosphate ester water-resistant agent to epoxy phosphate ester water-resistant agent is 1:3 to 1:1.

[0051] In this application, the lubricant is primarily used to ensure lubrication of the glass fibers during processes such as drawing, winding, and SMC production. Insufficient lubricant will not achieve the desired lubrication effect, while excessive lubricant will cause the glass fiber surface to become sticky and clump together, affecting the cutting and dispersibility of the glass fibers and negatively impacting the mechanical properties of the glass fiber composite material. The lubricant content is 0.05-0.8%, preferably 0.1-0.5%.

[0052] In some optional embodiments, the lubricant is a nonionic lubricant and / or an ionic lubricant. The use of nonionic and / or ionic lubricants in the impregnation agent of this application not only ensures the lubrication performance of the glass fiber, improves its wear resistance, reduces fraying and flyaways, and facilitates smooth fiber drawing operations, but also effectively improves the performance of the glass fiber, achieving excellent lubrication without affecting its cutting and dispersibility.

[0053] In some alternative embodiments, the nonionic lubricant is an emulsified mineral oil and / or a polyoxyethylene derivative.

[0054] In some alternative embodiments, the ionic lubricant is a fatty amine lubricant and / or a polyamide salt lubricant.

[0055] In this application, the antistatic agent is mainly used to ensure the conductivity of glass fibers during the winding process and SMC production, preventing static electricity accumulation. Insufficient antistatic agent content will not achieve the desired effect, affecting glass fiber dispersion and increasing fuzz; excessive content will cause the glass fibers to absorb moisture, increasing moisture content and leading to issues such as fraying. The antistatic agent content is 0.01-0.5%, preferably 0.05-0.3%.

[0056] In some optional embodiments, the antistatic agent is an ionic antistatic agent. The use of an ionic antistatic agent in this application ensures the antistatic properties of the glass fiber, improves its conductivity, and prevents surface charge accumulation, effectively enhancing the performance of the glass fiber.

[0057] In some optional embodiments, the ionic antistatic agent is a quaternary ammonium salt antistatic agent and / or a nitrate antistatic agent.

[0058] In this application, the pH adjuster primarily functions to regulate the pH value of the wetting agent. The pH adjuster can be an acidic pH adjuster (e.g., acetic acid). The glass fiber wetting agent in this application needs to be controlled to a slightly acidic environment to meet the requirements for hydrolysis of the silane coupling agent and the stability of the wetting agent. The content of the pH adjuster is 0.02%-0.5%, preferably 0.05%-0.3%.

[0059] In this application, water is used to dissolve the various components to obtain a glass fiber sizing agent of suitable concentration. The water content is 84.70%-97.30%, preferably 88.20%-95.45%, and more preferably 89.8%-94.3%. The water is preferably deionized water.

[0060] In some optional embodiments, the method for preparing the glass fiber impregnating agent includes the following steps:

[0061] After adding the pH adjuster to water and stirring until homogeneous, add the silane coupling agent and stir until homogeneous again to obtain a solution containing the silane coupling agent.

[0062] The first film-forming agent, the second film-forming agent, the water-resistant agent, the lubricant, the antistatic agent, and the solution containing the silane coupling agent, which are diluted with water respectively, are mixed and stirred evenly to obtain the glass fiber impregnating agent.

[0063] In some optional embodiments, the method for preparing the glass fiber impregnating agent includes the following steps:

[0064] 1) First, add 20-60 times the mass of water to the first stirring container, then add the pH adjuster. While stirring at 50-500 rpm, gradually and slowly add one or more silane coupling agents, with an interval of no less than 30 minutes between each silane coupling agent. Stir until the solution is clear and free of oil droplets on the surface.

[0065] 2) Add room temperature water at 2 to 20 times the mass of the first film-forming agent to the second mixing container. Add the first film-forming agent raw material while stirring at a speed of 50-500 rpm and stir until it is evenly dispersed.

[0066] 3) Add 2 to 20 times the mass of the second film-forming agent to room temperature water in the third container. Add the second film-forming agent raw material while stirring at 50-500 rpm and stir until it is evenly dispersed.

[0067] 4) Add 2 to 20 times the amount of water at 40-70℃ to the fourth container, and slowly add the water-resistant agent raw material while stirring at 100-500 rpm until it is evenly dispersed.

[0068] 5) Add 2 to 20 times the amount of lubricant to the fifth container, then add the lubricant. Stir at 50 to 300 rpm until evenly dispersed, then let it cool to room temperature.

[0069] 6) Add 2 to 20 times the amount of antistatic agent to water at 20-100℃ in the sixth container, then add the antistatic agent. Stir at 50-300 rpm until evenly dispersed, then let it cool to room temperature.

[0070] 7) Add the raw materials from the first to the sixth containers to the seventh mixing container, then add the remaining room temperature water, stir and disperse evenly to obtain the glass fiber impregnating agent.

[0071] Among them, normal temperature refers to 20-30℃.

[0072] In some optional embodiments, the glass fiber impregnating agent is applied to water-resistant products. These water-resistant products include, but are not limited to, fiberglass products such as waterproof membranes, bathtubs, and water tank containers.

[0073] To further illustrate the beneficial effects of the selected component types and component content ranges in the glass fiber sizing agent of this application, some examples of values ​​for each component included in the glass fiber sizing agent of this application are listed below.

[0074] The specific formulations of some embodiments 1 to 16 of the sizing agent for glass fiber in this application are shown in Table 1. The values ​​in Table 1 are the percentages of the effective component mass to the total mass of the sizing agent. It should be noted that the specific types, contents, and combinations of the effective components selected in Table 1 do not constitute a limitation on the scope of protection of this application.

[0075] Table 1. Wetting agent formulations for the embodiments.

[0076]

[0077] Table 1 (continued) - Immersion agent formulations for examples

[0078]

[0079] To further illustrate the beneficial effects of this application, commonly used SMC glass fiber impregnating agents in the bathroom industry are selected as comparatives 1 to 3. The content of each component in the impregnating agent is expressed as a mass percentage as follows:

[0080] Comparative Example 1:

[0081]

[0082]

[0083] Comparative Example 2:

[0084]

[0085] Comparative Example 3:

[0086]

[0087] The above examples and comparative examples were applied to the production of glass fibers, and the corresponding glass fibers were applied to the preparation of glass fiber composite materials. The glass fiber properties and the water resistance and mechanical properties of the final SMC molding material for bathroom use were compared and tested. The results are shown in Tables 2 to 4.

[0088] Table 2. Performance test results of the wetting agents in the examples and comparative examples.

[0089]

[0090] Table 2 (continued) Performance test results of the wetting agents in the examples and comparative examples

[0091]

[0092] As can be seen from the glass fiber performance test data in Table 2, the glass fibers prepared using the impregnating agent provided in this application (Examples 1 to 16) have less fuzz and lower moisture content. At the same time, the glass fiber color comparison data shows that the glass fibers of the example products are whiter, which is more processable and has color advantages for the bathroom products field, which is dominated by light colors.

[0093] Table 3 Mechanical properties of glass fiber reinforced SMC products in the examples and comparative examples

[0094]

[0095] Table 3 (continued) Mechanical properties of glass fiber reinforced SMC products in the examples and comparative examples

[0096]

[0097] As can be seen from the test data in Table 3, the mechanical properties of the glass fiber reinforced unsaturated polyester composite materials prepared using the sizing agent (Examples 1-16) provided in this application are excellent, including tensile strength, flexural strength and unnotched impact strength. This is a beneficial effect produced by the reasonable sizing agent composition and ratio in this application.

[0098] Table 4. Water resistance of glass fiber reinforced SMC products in the examples and comparative examples.

[0099]

[0100] Table 4 (continued) Water resistance of glass fiber reinforced SMC products in examples and comparative examples

[0101]

[0102] The meanings of the symbols in Table 4 are as follows:

[0103] √: The surface is intact, without pores or bubbles;

[0104] ○: Minor defects such as micropores and small air bubbles;

[0105] △: Numerous micropores and small air bubbles;

[0106] ×: Large bubble defect.

[0107] The test results of the 95°C boiling resistance test on the molded products of the examples and comparative examples are shown in Table 4. As can be seen from the test data in Table 4, the molded products of the examples showed no surface defects after boiling in water at 95°C for 600 hours, especially when the proportion of the water-resistant agent was increased to 0.5%, the water resistance could reach over 800 hours. In contrast, the comparative examples showed varying degrees of surface defects after boiling in water for 550 hours, indicating that the wetting agent formulation provided in this application has superior water resistance.

[0108] In summary, the sizing agent described in this application can alter the physical and chemical properties of the glass fiber surface. The coated glass fiber exhibits good compatibility with the unsaturated resin used in SMC, effectively improving the interfacial bonding strength between the glass fiber and the resin. The resulting composite material products possess superior mechanical properties. The combined use of the film-forming agent and water-resistant agent in the sizing agent significantly enhances the interfacial bonding between the glass fiber and the resin, suppresses the generation of interfacial defects, effectively improves water resistance, broadens the application of the composite material in products with high weather resistance requirements, and extends the service life of the composite material.

[0109] The above-described contents can be implemented individually or in various combinations, and these variations are all within the scope of protection of this application.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A glass fiber impregnating agent, characterized in that, The product comprises the following components, the contents of which are expressed as a percentage by mass: pH adjuster 0.02%-0.5%; silane coupling agent 0.1%-1.5%; first film-forming agent 2.0%-7.0%; second film-forming agent 0.5%-4.0%; water-resistant agent 0.02%-1.0%; lubricant 0.05%-0.8%; antistatic agent 0.01%-0.5%; water 84.7%-97.3%; wherein, the first film-forming agent is polyvinyl acetate, the second film-forming agent is epoxy resin, the mass ratio of the first film-forming agent to the second film-forming agent is 1:2-14:1, the water-resistant agent is a phosphate ester water-resistant agent; the polyvinyl acetate is acrylic-modified polyvinyl acetate and acetal-modified polyvinyl acetate; the phosphate ester water-resistant agent is an alkyl phosphate ester water-resistant agent and an epoxy phosphate ester water-resistant agent.

2. The glass fiber impregnating agent as described in claim 1, characterized in that, The silane coupling agent is a methacryloxysilane coupling agent and / or an epoxysilane coupling agent.

3. The glass fiber impregnating agent as described in claim 1, characterized in that, The epoxy resin is a polyurethane-modified epoxy resin and / or a dimer acid-modified epoxy resin.

4. The glass fiber impregnating agent as described in claim 1, characterized in that, The lubricant is a nonionic lubricant and / or an ionic lubricant.

5. The glass fiber impregnating agent as described in claim 4, characterized in that, The nonionic lubricant is emulsified mineral oil and / or polyoxyethylene derivatives; the ionic lubricant is aliphatic amine lubricant and / or polyamide salt lubricant.

6. The glass fiber impregnating agent as described in claim 1, characterized in that, The antistatic agent is an ionic antistatic agent, and the pH adjuster is an acidic pH adjuster; the ionic antistatic agent is a quaternary ammonium salt antistatic agent and / or a nitrate antistatic agent.

7. A method for preparing a glass fiber impregnating agent as described in any one of claims 1-6, characterized in that, The process includes the following steps: adding a pH adjuster to water and stirring until homogeneous, then adding a silane coupling agent and stirring until homogeneous to obtain a solution containing the silane coupling agent; mixing the first film-forming agent, the second film-forming agent, the water-resistant agent, the lubricant, and the antistatic agent, which are respectively diluted with water, with the solution containing the silane coupling agent and stirring until homogeneous to obtain the glass fiber impregnating agent.

8. A glass fiber product produced by coating with the glass fiber sizing agent according to any one of claims 1-6.

9. The use of a glass fiber impregnating agent as described in any one of claims 1-6 in water-resistant articles.

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