A glass fiber sizing and its method of preparation, product and use

Abstract

The application discloses a glass fiber sizing agent, which comprises effective components and water; the solid content is 2-9%, the effective components comprise silane coupling agent, film forming agent, lubricant, crosslinking agent, ultraviolet stabilizer and pH value regulator, and the percentage of the solid mass of each effective component of the sizing agent in the total solid mass of the sizing agent is as follows: 3-12% of the silane coupling agent; 2-10% of the lubricant; 65-92% of the film forming agent; 1-10% of the crosslinking agent; 0.1-1% of the ultraviolet stabilizer; and 0.5-5% of the pH value regulator; the silane coupling agent is a mixture of first silane coupling agent and second silane coupling agent, the first silane coupling agent is a silane coupling agent containing urea groups, and the second silane coupling agent is a silane coupling agent containing double bonds. The glass fiber yarn produced by using the sizing agent has less hairiness, good smoothness, good compatibility with target resin, very fast penetration in the target resin, high strength and modulus of the prepared yarn and resin combined composite material, and excellent weather resistance.

Description

Technical Field

[0001] This application relates to the field of glass fiber manufacturing technology, and in particular to a glass fiber impregnating agent, its preparation method, product and application, especially suitable for the production of glass fibers for photocuring pultrusion. Background Technology

[0002] Photovoltaics, short for photovoltaic power generation system, is a power generation system that uses the photovoltaic effect of semiconductor materials to convert solar radiation energy into electrical energy. The energy of photovoltaic power generation systems comes from inexhaustible solar energy, a clean, safe, and renewable energy source. Like wind power, it is highly valued by governments worldwide and has experienced rapid development in recent years. Traditional photovoltaic frames are made of aluminum metal, which is prone to deformation and has high production costs. Fiberglass composite materials are relatively cheaper and easier to manufacture, but commercially available fiberglass products often fail to meet the performance requirements of photovoltaic frames.

[0003] The fiberglass products used in the processing of photocurable photovoltaic (PV) frames require low fuzz, smooth operation, and rapid impregnation to reduce wear and tear and improve production efficiency. PV frames also need to provide long-term support for the solar panels, requiring the fiberglass products to have high strength and high modulus. Furthermore, solar panels are installed outdoors in diverse environments, including rooftops, deserts, and lakes, requiring them to withstand harsh conditions such as strong winds, sudden rain, and blizzards. This necessitates that the fiberglass products, when combined with resin, possess high weather resistance.

[0004] Currently, most large photovoltaic frame manufacturers and fiberglass production companies are trying to solve the above problems, but no mature solution has been found that can completely address issues such as high strength, high modulus, fast impregnation reaction, and good weather resistance after the fiberglass is bonded to the resin. Therefore, optimizing and adjusting the impregnating agent formulation to obtain fiberglass with excellent ease of use, good compatibility with the photosensitive resin used in photovoltaic frames, high strength, high modulus, and good weather resistance is of great significance. Summary of the Invention

[0005] This application aims to provide a glass fiber impregnating agent. Glass fiber yarns produced by coating with the impregnating agent of this application have less fuzz, good smoothness, and good compatibility with the target resin. They penetrate the target resin very quickly, and the resulting composite material of yarn and resin has high strength and modulus and excellent weather resistance.

[0006] According to one aspect of this application, a glass fiber impregnating agent is provided, the impregnating agent comprising an effective component and water; the solid content of the impregnating agent is 2-9%, and the effective component comprises a silane coupling agent, a film-forming agent, a lubricant, a crosslinking agent, a UV stabilizer, and a pH adjuster, the percentage of the solid mass of each effective component of the impregnating agent to the total mass of the impregnating agent is expressed as follows:

[0007] Silane coupling agent 3-12%;

[0008] Lubricant 2-10%;

[0009] Film-forming agent 65-92%;

[0010] Crosslinking agent 1-10%;

[0011] UV stabilizer 0.1-1%;

[0012] pH adjuster 0.5-5%;

[0013] The silane coupling agent is a mixture of a first silane coupling agent and a second silane coupling agent, wherein the first silane coupling agent is a urea-containing silane coupling agent and the second coupling agent is a silane coupling agent containing a double bond.

[0014] Furthermore, the percentage of the solid mass of each effective component of the wetting agent to the total mass of the wetting agent is expressed as follows:

[0015] Silane coupling agent 4-11%;

[0016] Lubricant 4-8%;

[0017] Film-forming agent 69-88%;

[0018] Crosslinking agent 2-8%;

[0019] UV stabilizer 0.3-0.9%;

[0020] pH adjuster 1-4.5%.

[0021] Furthermore, the percentage of the solid mass of each effective component of the wetting agent to the total mass of the wetting agent is expressed as follows:

[0022] Silane coupling agent 5-9%;

[0023] Lubricant 3-7%;

[0024] Film-forming agent 72-85%;

[0025] Crosslinking agent 2-6%;

[0026] UV stabilizer 0.4-0.8%;

[0027] pH adjuster 1.5-4%.

[0028] Furthermore, the film-forming agent is a mixture of a first film-forming agent and a second film-forming agent, wherein the first film-forming agent is a modified epoxy resin emulsion and the second film-forming agent is a polyurethane resin emulsion.

[0029] Furthermore, the first film-forming agent is a bismaleimide-modified epoxy resin emulsion, and the second film-forming agent is a polyester-type polyurethane emulsion.

[0030] Furthermore, the mass ratio C1 of the first film-forming agent and the second film-forming agent is 1:1 to 5:1.

[0031] Furthermore, the first silane coupling agent is ureopropyltrimethoxysilane or / and γ-ureopropyltriethoxysilane coupling agent.

[0032] Furthermore, the second silane coupling agent is 3-allyloxypropyltrimethoxysilane or / and γ-methacryloxypropylmethyldiethoxysilane coupling agent.

[0033] Furthermore, the mass ratio of the first silane coupling agent to the second silane coupling agent C2 is 1:1 to 10:1.

[0034] Furthermore, the lubricant is at least one of silicone oil, PEG-based lubricant, and polyoxyethylene alkylphenol ether lubricant.

[0035] Furthermore, the crosslinking agent is a hydroxyl-based crosslinking agent or / and a modified amine crosslinking agent.

[0036] Furthermore, the ultraviolet stabilizer is at least one of the following: a mixture of benzotriazoles, 2-hydroxy-4-methoxybenzophenone, hydroxyethylpiperidine alcohol, and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid.

[0037] Furthermore, the mass ratio of the crosslinking agent to the ultraviolet stabilizer C3 is 5:1 to 12:1.

[0038] Furthermore, the pH adjuster is at least one of acetic acid, formic acid, and citric acid.

[0039] According to a second aspect of this application, a method for preparing the aforementioned glass fiber impregnating agent is provided, comprising the following steps:

[0040] S1: Add water accounting for 30% to 40% of the total mass of the wetting agent to the container, then add the pH adjuster and silane coupling agent in sequence, and stir thoroughly until the solution is clear;

[0041] S2: Dilute the lubricant and crosslinking agent with 5 to 8 times their respective weights of water and add them to the container;

[0042] S3: Dilute the film-forming agent with 2 to 4 times its weight of water and add it to the container;

[0043] S4: Dilute the UV stabilizer with 5 to 10 times its weight of water, add it to a container, make up the amount of water in the formula, stir well, and the finished product is obtained.

[0044] According to a third aspect of this application, a glass fiber product produced by coating with the aforementioned glass fiber sizing agent is provided.

[0045] According to the fourth aspect of this application, the aforementioned glass fiber impregnating agent is provided for use in the pultrusion molding process of photosensitive resin or in the production of yarn for photovoltaic frames.

[0046] Glass fibers produced using the sizing agent formulation of this application exhibit high process smoothness, good bonding between the fiber and the photosensitive resin matrix, high mechanical strength, good resistance to photoaging and stability, and excellent weather resistance, making them highly suitable for photosensitive resin pultrusion processes or photovoltaic frame yarns. Detailed Implementation

[0047] 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 specific 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.

[0048] In some optional embodiments, a glass fiber sizing agent is provided, comprising an effective component and water. The effective component comprises a silane coupling agent, a film-forming agent, a lubricant, a crosslinking agent, a UV stabilizer, and a pH adjuster. The solid content of the sizing agent is 2-9%. The percentage of the mass of the non-aqueous portion of each component in the sizing agent relative to the total mass of the non-aqueous portion is as follows: silane coupling agent 3-12%; lubricant 2-10%; film-forming agent 65-92%; crosslinking agent 1-10%; UV stabilizer 0.1-1%; pH adjuster 0.5-5%. The silane coupling agent is a mixture of a first silane coupling agent and a second silane coupling agent, wherein the first silane coupling agent is a urea-containing silane coupling agent, and the second coupling agent is a silane coupling agent containing double bonds.

[0049] In some optional embodiments, a glass fiber sizing agent is provided, comprising an effective component and water. The effective component comprises a silane coupling agent, a film-forming agent, a lubricant, a crosslinking agent, a UV stabilizer, and a pH adjuster. The solid content of the sizing agent is 3-8%. The percentage of solid mass of each effective component in the sizing agent relative to the total mass of the sizing agent is as follows: silane coupling agent 4-11%; lubricant 4-8%; film-forming agent 69-88%; crosslinking agent 2-8%; UV stabilizer 0.3-0.9%; pH adjuster 1-4.5%. The silane coupling agent is a mixture of a first silane coupling agent and a second silane coupling agent, wherein the first silane coupling agent is a urea-containing silane coupling agent, and the second coupling agent is a silane coupling agent containing double bonds.

[0050] In some optional embodiments, a glass fiber sizing agent is provided, comprising an effective component and water. The effective component comprises a silane coupling agent, a film-forming agent, a lubricant, a crosslinking agent, a UV stabilizer, and a pH adjuster. The solid content of the sizing agent is 3-8%. The percentage of solid mass of each effective component in the sizing agent relative to the total mass of the sizing agent is as follows: silane coupling agent 5-9%; lubricant 3-7%; film-forming agent 72-85%; crosslinking agent 2-6%; UV stabilizer 0.4-0.8%; pH adjuster 1.5-4%. The silane coupling agent is a mixture of a first silane coupling agent and a second silane coupling agent, wherein the first silane coupling agent is a urea-containing silane coupling agent, and the second coupling agent is a silane coupling agent containing double bonds.

[0051] In this application, the silane coupling agent exhibits high reactivity. Its active groups can react with the hydroxyl groups on the surface of the glass fiber to form Si-O-Si bonds. Simultaneously, the coupling agent molecules can compensate for microcracks generated during the glass fiber drawing process, thus protecting the glass fiber. Selecting a suitable silane coupling agent can not only improve the mechanical properties of the glass fiber itself and the prepared fiberglass products but also reduce the production cost of the glass fiber. Therefore, the selection of the silane coupling agent is one of the key points of this application. Furthermore, the amount of silane coupling agent used must be controlled within an appropriate range. Too little silane coupling agent will result in weak interfacial bridging, leading to insufficient mechanical properties of the composite material; too much will not only saturate the active ingredients, causing waste and increasing costs, but will also cause the yarn to become excessively stiff. This application controls the solid mass of the silane coupling agent to account for 3–12% of the solid mass of the sizing agent, preferably 4–11%, more preferably 5–9%, and even more preferably 6–8%.

[0052] This application uses a mixture of a first silane coupling agent and a second silane coupling agent. The first silane coupling agent is a urea-containing silane coupling agent, and the second silane coupling agent is a double-bond-containing silane coupling agent. Urea-containing silanes have a longer pot life and are less prone to aging and denaturation than aminosilanes in reactive polymer systems such as phenolic, epoxy, urethane-based melamine, or polyurethane. Specifically, the urea-containing silane coupling agent, with its unique molecular structure, can effectively improve the water resistance and weather resistance of the coating, making the coating more durable. Simultaneously, the urea-containing silane coupling agent can also enhance the adhesion between the coating and the substrate, improve the coating's peel resistance, and make it more robust. The double-bond-containing silane coupling agent is easily copolymerized with polymers, which can cure photosensitive resins.

[0053] Film-forming agents are an important component of sizing agents. They are the main components for achieving fiber bundling and maintaining fiber integrity. Film-forming agents also protect the glass fiber drawing process and improve the compatibility between the glass fiber and the matrix resin. Simultaneously, the amount of film-forming agent needs to be controlled within a suitable range. Too little film-forming agent results in poor film formation on the glass fiber surface, poor bonding with the resin, and easy fiber fuzzing. Too much film-forming agent reduces product dispersibility, causes yarn adhesion, and poor resin wetting. Therefore, this application controls the solid mass of the film-forming agent to account for 65-92% of the total solid mass of the sizing agent, preferably 69-88%, more preferably 72-85%, and even more preferably 76-81%.

[0054] The use of lubricant mainly increases the wear resistance of glass fiber, making the drawing process smooth and efficient, and also significantly improves the performance of the product during use. The amount of lubricant used has a significant impact on the glass fiber; too little lubricant will reduce its smoothness during use, easily causing fuzzing and yarn breakage; however, using too much lubricant will affect the bundle structure of the glass fiber yarn, reduce the bonding between the glass fiber and the resin interface, and ultimately reduce the mechanical properties of the fiberglass product. Therefore, in this application, the solid mass of the lubricant accounts for 2-10% of the total solid mass of the impregnating agent, preferably 4-8%, more preferably 3-7%, and even more preferably 3-5%.

[0055] The use of crosslinking agents can transform linear or slightly branched macromolecules into a three-dimensional network structure, thereby improving properties such as strength, heat resistance, abrasion resistance, and solvent resistance. Simultaneously, the amount of crosslinking agent must be controlled within a suitable range. Too much will cause the glass fiber product to have a yellowish appearance, and the yarn to become harder and more brittle, increasing hairiness during use; too little will have an insignificant effect, resulting in poor mechanical properties of the final composite material. In this application, the solid mass of the crosslinking agent is controlled to account for 1-10% of the total solid mass of the sizing agent, preferably 2-8%, more preferably 2-6%, and even more preferably 3-5%.

[0056] Ultraviolet (UV) stabilizers are primarily used to prevent or delay resin degradation caused by the decomposition of components in glass fiber products under prolonged exposure to extreme light conditions. They function by shielding or absorbing UV energy, quenching singlet oxygen, and decomposing hydrogen peroxide into inactive substances. This allows the polymer to eliminate or slow down photochemical reactions under light radiation, preventing or delaying photoaging and thus extending the service life of the polymer products. Simultaneously, the amount of UV stabilizer used must be controlled within a suitable range. Too little UV stabilizer will not significantly prevent or delay photoaging; too much will reduce the mechanical properties of the glass fiber bonded to the resin. Therefore, this application controls the solid mass of the UV stabilizer to be 0.1–1% of the total solid mass of the sizing agent, preferably 0.3–0.9%, more preferably 0.4–0.8%, and even more preferably 0.5–0.7%.

[0057] The main function of the pH adjuster is to assist in the dispersion of the silane coupling agent and to adjust the pH value of the prepared wetting agent. In this application, the percentage of the solid mass of the pH adjuster to the total solid mass of the wetting agent is 0.5-5%, preferably 1-4.5%, more preferably 1.5-4%, and even more preferably 2-3%.

[0058] This application uses water as the dispersed phase for each component of the wetting agent. Compared to the solvent dispersed phase, water is more environmentally friendly and safer. The water can be deionized water.

[0059] In some optional embodiments, the film-forming agent is a mixture of a first film-forming agent and a second film-forming agent, wherein the first film-forming agent is a modified epoxy resin emulsion and the second film-forming agent is a polyurethane resin emulsion. Using a mixture of modified epoxy resin emulsion and polyurethane resin emulsion as the film-forming agent ensures both the yarn's bundleability and smoothness in subsequent use, as well as the glass fiber's rapid impregnation performance, thereby guaranteeing uniform mixing of the glass fiber and the matrix resin and sufficient and complete interfacial bonding.

[0060] In some optional embodiments, the first film-forming agent is a bismaleimide-modified epoxy resin emulsion, and the second film-forming agent is a polyester-type polyurethane emulsion. For example, the first film-forming agent is a bismaleimide-modified bisphenol A type epoxy resin emulsion, and the second film-forming agent is a polyester-type polyurethane emulsion with a molecular weight of 300-400. The bismaleimide-modified epoxy resin emulsion not only has good adhesion and low curing shrinkage, but also high heat resistance. The polyester-type polyurethane emulsion is not only environmentally friendly, but the finished product also has excellent strength and abrasion resistance, good aging resistance, oxidation resistance, and corrosion resistance. Furthermore, the low molecular weight of the polyester-type polyurethane emulsion results in lower viscosity, allowing for better dispersibility of the finished glass fiber after overstretching and easier impregnation.

[0061] In some optional embodiments, the mass ratio C1 of the first film-forming agent and the second film-forming agent is 1:1 to 5:1. If the amount of the first film-forming agent is too high, the product dispersibility is poor and the resin wetting effect is inadequate; if the proportion of the second film-forming agent is too high, the yarn is too soft and lacks stiffness. When the mass ratio C1 of the first film-forming agent and the second film-forming agent is 1:1 to 5:1, the dispersibility of the sizing agent is good, and both the wetting effect of the sizing agent and the stiffness of the yarn are excellent. The mass ratio C1 of the first film-forming agent and the second film-forming agent can be 2:1 to 4:1. For example, the mass ratio C1 of the first film-forming agent and the second film-forming agent is 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1, 4.5:1, or 5:1.

[0062] In some optional embodiments, the first silane coupling agent is ureopropyltrimethoxysilane coupling agent and / or γ-ureopropyltriethoxysilane coupling agent, and the second silane coupling agent is 3-allyloxypropyltrimethoxysilane coupling agent and / or γ-methacryloyloxypropylmethyldiethoxysilane coupling agent. This second silane coupling agent has highly reactive double bonds, readily reacts with the polymer matrix, can be UV cured, and can improve the scratch resistance, high-temperature resistance, and environmental aging resistance of the polymer coating.

[0063] In some optional embodiments, the mass ratio C2 of the first silane coupling agent and the second silane coupling agent is 1:1 to 10:1. If the dosage of the first coupling agent is too high, the yarn dispersion is poor, affecting the impregnation speed of the product; if the proportion of the second coupling agent is too high, there is too much yarn hairiness, affecting the performance of the product. When the mass ratio C2 of the first silane coupling agent and the second silane coupling agent is 1:1 to 10:1, the glass fibers coated with the sizing agent prepared by combining the silane coupling agent with other components have excellent properties. The mass ratio C2 of the first silane coupling agent and the second silane coupling agent can be 1:1 to 4:1. For example, the mass ratio C2 of the first silane coupling agent and the second silane coupling agent is 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1, 4.5:1, 5:1, and 6:1.

[0064] In some optional embodiments, the lubricant is at least one of silicone oil, PEG-based lubricants, and polyoxyethylene alkylphenol ether lubricants. These lubricants possess excellent lubricity and good water solubility, good compatibility with many organic components, and good antistatic properties, thus offering some protection against static electricity generated during product use.

[0065] In some optional embodiments, the crosslinking agent is a hydroxyl-based crosslinking agent and / or a modified amine crosslinking agent. For example, the crosslinking agent is hydroxyethyl ethylenediamine.

[0066] In some optional embodiments, the UV stabilizer is at least one selected from benzotriazole mixture emulsions, 2-hydroxy-4-methoxybenzophenone, hydroxyethylpiperidinol, and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid. These UV stabilizers are readily soluble in water and can effectively eliminate or slow down the possibility of photochemical reactions, preventing or delaying the photoaging process.

[0067] In some optional embodiments, the mass ratio C3 of the crosslinking agent to the UV stabilizer is 5:1 to 12:1. When the mass ratio of the crosslinking agent to the UV stabilizer is within this range, the raw yarn has less hairiness, better bundle structure, no significant change in yarn color, and the product exhibits good resistance to photoaging and stability. The mass ratio C3 of the crosslinking agent to the UV stabilizer can also be 6:1 to 10:1. Exemplary examples include mass ratios C3 of 5:1, 6:1, 6.5:1, 7:1, 8:1, 9:1, 9.5:1, 10:1, 11:1, and 12:1.

[0068] In some optional embodiments, the pH adjuster is a water-soluble acid. For example, the pH adjuster is at least one of citric acid, acetic acid, and formic acid.

[0069] In some optional embodiments, a method for preparing the above-mentioned glass fiber impregnating agent is provided, comprising the following steps:

[0070] S1: Add water accounting for 30% to 40% of the total mass of the wetting agent to the container, then add the pH adjuster and silane coupling agent in sequence, and stir thoroughly until the solution is clear;

[0071] S2: Dilute the lubricant and crosslinking agent with 5 to 8 times their respective weights of water and add them to the container;

[0072] S3: Dilute the film-forming agent with 2 to 4 times its weight of water and add it to the container;

[0073] S4: Dilute the UV stabilizer with 5 to 10 times its weight of water, add it to a container, make up the amount of water in the formula, stir well, and obtain the glass fiber impregnating agent.

[0074] In some alternative embodiments, a glass fiber product produced by coating with the glass fiber sizing agent described above is provided.

[0075] In some alternative embodiments, the application of the glass fiber impregnating agent as described above in the photosensitive resin pultrusion process or the production of yarn for photovoltaic frames is provided.

[0076] To more clearly explain the technical solution of this application, some specific embodiments of the glass fiber impregnating agent of this application (Examples 1 to 16) are listed below. The specific formulations of the glass fiber impregnating agent of Examples 1 to 16 of this application are shown in Table 1. The values ​​in Table 1 are the percentages of the solid mass of the effective component to the total mass of the impregnating agent.

[0077] It should be noted that the specific types, contents, and combinations of the components selected in Table 1 do not limit the scope of protection of this application.

[0078] Table 1. Proportions of each effective component of the wetting agent in the examples

[0079]

[0080] Table 1 (continued) Proportions of each effective component of the wetting agent in the examples

[0081]

[0082] To further illustrate the beneficial effects of this application, a commonly used glass fiber sizing agent was selected as a comparative example. The formulation of the comparative example is shown below, wherein the amount of the effective component is the percentage of the solid mass of the effective component to the total mass of the sizing agent.

[0083] Comparative Example 1

[0084] First silane coupling agent: 0.56% epoxy silane coupling agent;

[0085] Second silane coupling agent: 0.35% aminosilane coupling agent;

[0086] Lubricant: 0.21% mineral oil-based lubricant;

[0087] First film-forming agent: epoxy resin 4.03%;

[0088] Second film-forming agent: 1.17% polyurethane resin;

[0089] Crosslinking agent: 0.03% polyacrylamide;

[0090] pH adjuster: 0.15% acetic acid;

[0091] Water: Balance.

[0092] The properties of the glass fiber products coated with the prepared sizing agents (Examples 1-16 and Comparative Example 1) were tested. The test results are shown in Table 2.

[0093] Table 2 Performance test results of the examples and comparative examples

[0094]

[0095] Table 2 (continued) Performance test results of the examples and comparative examples

[0096]

[0097] As can be seen from Table 2, by selecting the types and controlling the content of each component of the sizing agent, we can obtain a sizing agent formulation that meets the application requirements. The glass fiber prepared by the example has appropriate yarn quality, less hairiness, good fiber penetration effect, very fast penetration speed, and high mechanical strength. Under extreme conditions of ultraviolet light and high temperature and humidity, the product retains 90° tensile properties significantly higher than the comparative example, and is significantly better than the products currently on the market.

[0098] In summary, the glass fiber yarn produced by the glass fiber impregnating agent involved in this application has good bundle properties, less fuzz during use, high mechanical strength, excellent compatibility with photosensitive resin, good stability under extreme conditions, and rapid and complete impregnation in photosensitive resin, making it very suitable for preparing yarn for photocurable photovoltaic frame materials.

[0099] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. 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 wetting agent comprises an effective component and water; the solid content of the wetting agent is 2-9%, and the effective component comprises a silane coupling agent, a film-forming agent, a lubricant, a crosslinking agent, a UV stabilizer, and a pH adjuster. The percentage of the solid mass of each effective component of the wetting agent to the total solid mass of the wetting agent is expressed as follows: Silane coupling agent 3-12%; Lubricant 2-10%; Film-forming agent 65-92%; Crosslinking agent 1-10%; UV stabilizer 0.1-1%; pH adjuster 0.5-5%; Wherein, the silane coupling agent is a mixture of a first silane coupling agent and a second silane coupling agent, wherein the first silane coupling agent is a urea-containing silane coupling agent, and the second silane coupling agent is a silane coupling agent containing a double bond; The film-forming agent is a mixture of a first film-forming agent and a second film-forming agent, wherein the first film-forming agent is a bismaleimide-modified epoxy resin emulsion and the second film-forming agent is a polyester-type polyurethane emulsion; The mass ratio C1 of the first film-forming agent and the second film-forming agent is 1:1 to 5:

1.

2. The glass fiber impregnating agent according to claim 1, characterized in that, The percentage of the solid mass of each effective component of the wetting agent to the total solid mass of the wetting agent is expressed as follows: Silane coupling agent 4-11%; Lubricant 4-8%; Film-forming agent 69-88%; Crosslinking agent 2-8%; UV stabilizer 0.3-0.9%; pH adjuster 1-4.5%.

3. The glass fiber impregnating agent according to claim 1 or 2, characterized in that, The first silane coupling agent is ureopropyltrimethoxysilane or / and γ-ureopropyltriethoxysilane coupling agent; the second silane coupling agent is 3-allyloxypropyltrimethoxysilane or / and γ-methacryloyloxypropylmethyldiethoxysilane coupling agent.

4. The glass fiber impregnating agent according to claim 1 or 2, characterized in that, The mass ratio of the first silane coupling agent to the second silane coupling agent C2 is 1:1 to 10:

1.

5. The glass fiber impregnating agent according to claim 1 or 2, characterized in that, The lubricant is at least one of silicone oil, PEG-based lubricant, and polyoxyethylene alkylphenol ether lubricant.

6. The glass fiber impregnating agent according to claim 1 or 2, characterized in that, The crosslinking agent is a hydroxyl-based crosslinking agent or / and a modified amine crosslinking agent; The ultraviolet stabilizer is at least one of the following: a mixture of benzotriazoles, 2-hydroxy-4-methoxybenzophenone, hydroxyethylpiperidine alcohol, and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid.

7. The glass fiber impregnating agent according to claim 1, characterized in that, The mass ratio of the crosslinking agent to the ultraviolet stabilizer C3 is 5:1 to 12:

1.

8. A method for preparing a glass fiber impregnating agent as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Add water accounting for 30% to 40% of the total mass of the wetting agent to the container, then add the pH adjuster and silane coupling agent in sequence, and stir thoroughly until the solution is clear; S2: Dilute the lubricant and crosslinking agent with 5 to 8 times their respective weights of water and add them to the container; S3: Dilute the film-forming agent with 2 to 4 times its weight of water and add it to the container; S4: Dilute the UV stabilizer with 5 to 10 times its weight of water, add it to a container, make up the amount of water in the formula, stir evenly, and obtain the glass fiber impregnating agent.

9. A glass fiber product produced by coating with the glass fiber sizing agent according to any one of claims 1-7.

10. The application of the glass fiber sizing agent as described in any one of claims 1-7 in the pultrusion molding process of photosensitive resin or the production of yarn for photovoltaic frames.

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