Glass fiber sizing agent for transparent plate coating and preparation method thereof

Abstract

The present invention discloses a glass fiber sizing agent for transparent plate coating and a preparation method thereof, and relates to the technical field of glass fiber production; the sizing agent comprises the following raw materials in weight percentage: 0.02-0.1% glacial acetic acid, 0.2-0.5% coupling agent, 3.5-10% film former, 0.1-0.5% lubricant and 0.02-0.2% antistatic agent, and the balance is deionized water. The present invention also provides a preparation method of the above-mentioned sizing agent. The sizing agent of the present invention can give the glass fiber high penetration speed, high light transmittance, excellent short-cut property, antistatic property, good aging resistance and good bonding performance with matrix resin, which effectively solves the problems of poor light transmittance and slow penetration speed in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber production, and in particular to a glass fiber sizing agent for coating a transparent plate and a preparation method thereof. Background Art

[0002] Fiberglass skylight panels are a composite material, also known as fiberglass reinforced plastics. They are made of unsaturated polyester resin, high-performance polyester film and glass fiber. They are transparent, lightweight, high-strength and corrosion-resistant, and are widely used on the roofs or walls of civil, commercial and industrial buildings. The sizing agent for glass fiber is the key technology for the production of glass fiber for skylight panels, and plays a vital role in product design. It not only protects the glass fiber and gives it post-processing characteristics, but also meets the performance requirements of the skylight panels, and has high light transmittance and high strength.

[0003] At present, most of the domestic products use a mixed emulsion of polyester emulsion and polyvinyl acetate (PVAC) as a film-forming agent. Due to the large difference in refractive index between PVAC, matrix resin and glass, the product has poor transparency and is difficult to meet the high transparency requirements of the product. In addition, the compatibility between PVAC resin and matrix resin is poor, the mechanical properties of the produced products are poor, and there are problems such as poor transmittance and slow penetration speed. Therefore, it is necessary to improve and update the existing transparent sheet yarn sizing agent formula and develop a sizing agent with good transmittance and high compatibility to improve the transparency and mechanical properties of the product and increase the service life of the product. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a glass fiber impregnating agent for transparent plate coating and a preparation method thereof, wherein the impregnating agent can give the glass fiber high penetration speed, high light transmittance, excellent short-cut property, antistatic property, good aging resistance and good bonding performance with the matrix resin, and effectively solves the problems of poor light transmittance and slow penetration speed in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a glass fiber sizing agent for transparent plate coating is provided, comprising the following raw materials in weight percentage: 0.02-0.1% glacial acetic acid, 0.2-0.5% coupling agent, 3.5-10% film-forming agent, 0.1-0.5% lubricant and 0.02-0.2% antistatic agent, and the balance is deionized water.

[0006] Furthermore, the glass fiber sizing agent for transparent plate coating includes the following raw materials in weight percentage: 0.04% glacial acetic acid, 0.33% coupling agent, 6.8% film-forming agent, 0.33% lubricant and 0.08% antistatic agent, and the balance is deionized water.

[0007] Furthermore, the glass fiber sizing agent for transparent plate coating includes the following raw materials in weight percentage: 0.03% glacial acetic acid, 0.28% coupling agent, 6.5% film-forming agent, 0.25% lubricant and 0.05% antistatic agent, and the balance is deionized water.

[0008] Furthermore, the glass fiber sizing agent for transparent plate coating includes the following raw materials in weight percentage: 0.06% glacial acetic acid, 0.4% coupling agent, 6.9% film-forming agent, 0.3% lubricant and 0.15% antistatic agent, and the balance is deionized water.

[0009] Furthermore, the film-forming agent is a mixture of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion.

[0010] Furthermore, the weight percentages of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion in the glass fiber sizing agent for coating the transparent plate are 2.5-6%, 0.5-2% and 0.5-2% respectively.

[0011] Furthermore, the weight percentages of the epoxy-modified polyester emulsion, the polyester emulsion and the high molecular epoxy emulsion in the glass fiber sizing agent for coating the transparent plate are 5.5%, 0.8% and 0.5% respectively.

[0012] Furthermore, the weight percentages of the epoxy-modified polyester emulsion, the polyester emulsion and the high molecular epoxy emulsion in the glass fiber sizing agent for coating the transparent plate are 3.5%, 1.5% and 1.5% respectively.

[0013] Furthermore, the weight percentages of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion in the glass fiber sizing agent for coating the transparent plate are 4.8%, 1.3% and 0.8% respectively.

[0014] Furthermore, the coupling agent is γ-methacryloxypropyltrimethoxysilane.

[0015] Furthermore, the lubricant is a polyethylene glycol type nonionic surfactant.

[0016] Furthermore, the antistatic agent is lithium chloride.

[0017] The method for preparing the glass fiber sizing agent for transparent plate coating comprises the following steps: Add 35-45% deionized water into the preparation tank at room temperature, then add glacial acetic acid and stir to make the pH value 3.5-4.5, add the coupling agent linearly and stir until the water is clear, transparent and has no oil film, then add the coupling agent, then add the film-forming agent diluted 2 times, add deionized water to prepare 85% of the total amount of the wetting agent and stir for 20-40 minutes, determine the solid content of the emulsion and add water to obtain the glass fiber wetting agent for transparent plate coating.

[0018] Furthermore, the stirring speed is 50-70 r / min.

[0019] Furthermore, in the glass fiber sizing agent for transparent plate coating, the solid content of the emulsion is 3.8±0.15%, and the pH value of the emulsion is 4-6.

[0020] The present invention has the following beneficial effects: 1. The sizing agent of the present invention can give the glass fiber high penetration speed, high light transmittance, excellent short-cut property, antistatic property, good aging resistance and good bonding performance with the matrix resin, effectively solving the problems of poor light transmittance and slow penetration speed in the prior art. The reinforced glass fiber is applied to transparent plates and FRP lighting panels through a continuous plate forming process, giving the products good mechanical properties while maintaining high light transmittance.

[0021] 2. The present invention adopts epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion mixed together as film-forming agent, which satisfies the requirements of short-cutting and good bonding, moderate yarn stiffness, about 110-140, compatible with matrix resin and rapid penetration, and film-forming refractive index is similar to glass fiber and matrix resin, which improves the product transparency and glass fiber penetration speed of glass fiber and improves the product strength. Glacial acetic acid is used to adjust the pH value so that the coupling agent is fully hydrolyzed in an acidic environment; and by coating the coupling agent on the glass fiber, the glass fiber and the matrix resin can be effectively connected, thereby enhancing the bonding performance of the composite material, and the selection of γ-methacryloxypropyltrimethoxysilane can significantly improve the bonding force between the sheet yarn and the matrix resin, and improve the mechanical properties and aging resistance of the product. And the use of polyethylene glycol-type nonionic surfactant as a lubricant can achieve the purpose of lubricating the fiber surface to reduce wear and reduce the generation of hairiness. Excessive use of lubricant affects the mechanical properties of glass fiber. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below, and the examples are only used to explain the present invention and are not used to limit the scope of the present invention. If no specific conditions are specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments is not specified, they are all conventional products that can be purchased commercially.

[0023] Example 1 A glass fiber sizing agent for transparent plate coating includes the following raw materials in weight percentage: 0.03% glacial acetic acid, 0.28% coupling agent, 6.5% film former, 0.25% lubricant and 0.05% antistatic agent, and the balance is deionized water. The film former is a mixture of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion, and the weight percentages of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion in the glass fiber sizing agent for transparent plate coating are 3.5%, 1.5% and 1.5% respectively. The coupling agent is γ-methacryloxypropyltrimethoxysilane, the lubricant is a polyethylene glycol type nonionic surfactant, and the antistatic agent is lithium chloride.

[0024] The method for preparing the glass fiber sizing agent for transparent plate coating comprises the following steps: Add 35-45% deionized water into the preparation tank at room temperature, then add glacial acetic acid and stir (60r / min) to make the pH value 3.5-4.5, add the coupling agent linearly and stir until the water is clear, transparent and free of oil film, then add the coupling agent, then add the film-forming agent diluted 2 times, add deionized water to prepare 85% of the total amount of the wetting agent and stir for 30 minutes, determine the solid content of the emulsion and add water to obtain the glass fiber wetting agent for transparent plate coating.

[0025] Example 2 A glass fiber sizing agent for transparent plate coating includes the following raw materials in weight percentage: 0.04% glacial acetic acid, 0.33% coupling agent, 6.8% film former, 0.33% lubricant and 0.08% antistatic agent, and the balance is deionized water. The film former is a mixture of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion, and the weight percentages of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion in the glass fiber sizing agent for transparent plate coating are 5.5%, 0.8% and 0.5% respectively. The coupling agent is γ-methacryloxypropyltrimethoxysilane, the lubricant is a polyethylene glycol type nonionic surfactant, and the antistatic agent is lithium chloride.

[0026] The method for preparing the glass fiber sizing agent for transparent plate coating comprises the following steps: Add 35-45% deionized water into the preparation tank at room temperature, then add glacial acetic acid and stir (60r / min) to make the pH value 3.5-4.5, add the coupling agent linearly and stir until the water is clear, transparent and free of oil film, then add the coupling agent, then add the film-forming agent diluted 2 times, add deionized water to prepare 85% of the total amount of the wetting agent and stir for 30 minutes, determine the solid content of the emulsion and add water to obtain the glass fiber wetting agent for transparent plate coating.

[0027] Example 3 A glass fiber sizing agent for transparent plate coating includes the following raw materials in weight percentage: 0.06% glacial acetic acid, 0.4% coupling agent, 6.9% film former, 0.3% lubricant and 0.15% antistatic agent, and the balance is deionized water. The film former is a mixture of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion, and the weight percentages of epoxy-modified polyester emulsion, polyester emulsion and high molecular epoxy emulsion in the glass fiber sizing agent for transparent plate coating are 4.8%, 1.3% and 0.8% respectively. The coupling agent is γ-methacryloxypropyltrimethoxysilane, the lubricant is a polyethylene glycol type nonionic surfactant, and the antistatic agent is lithium chloride.

[0028] The method for preparing the glass fiber sizing agent for transparent plate coating comprises the following steps: Add 35-45% deionized water into the preparation tank at room temperature, then add glacial acetic acid and stir (60r / min) to make the pH value 3.5-4.5, add the coupling agent linearly and stir until the water is clear, transparent and free of oil film, then add the coupling agent, then add the film-forming agent diluted 2 times, add deionized water to prepare 85% of the total amount of the wetting agent and stir for 30 minutes, determine the solid content of the emulsion and add water to obtain the glass fiber wetting agent for transparent plate coating.

[0029] The performance of the glass fiber sizing agent for coating the transparent plate obtained in Example 1-2 was tested, and the results are shown in Table 1.

[0030] Table 1 Performance test results statistics

[0031] It can be seen from Table 1 that the glass fiber sizing agent for transparent plate coating of the present invention can meet the design requirements of the plate yarn, and the penetration speed and transparency of the glass fiber are significantly improved.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A glass fiber sizing agent for transparent plate coating, characterized in that: The invention comprises the following raw materials in weight percentage: 0.02-0.1% of glacial acetic acid, 0.2-0.5% of coupling agent, 3.5-10% of film-forming agent, 0.1-0.5% of lubricant and 0.02-0.2% of antistatic agent, and the balance is deionized water.

2. The glass fiber sizing agent for coating transparent plate material according to claim 1, characterized in that: The invention comprises the following raw materials in weight percentage: 0.04% glacial acetic acid, 0.33% coupling agent, 6.8% film-forming agent, 0.33% lubricant and 0.08% antistatic agent, and the balance is deionized water.

3. The glass fiber sizing agent for transparent plate coating according to claim 1 or 2, characterized in that: The film-forming agent is a mixture of epoxy-modified polyester emulsion, polyester emulsion and high-molecular epoxy emulsion.

4. The glass fiber sizing agent for coating transparent plate material according to claim 3, characterized in that: The weight percentages of the epoxy-modified polyester emulsion, the polyester emulsion and the high molecular epoxy emulsion in the glass fiber sizing agent for coating the transparent plate are 2.5-6%, 0.5-2% and 0.5-2% respectively.

5. The glass fiber sizing for coating transparent plate material according to claim 4, characterized in that: The weight percentages of the epoxy-modified polyester emulsion, the polyester emulsion and the high molecular epoxy emulsion in the glass fiber sizing agent for coating the transparent plate are 5.5%, 0.8% and 0.5% respectively.

6. The glass fiber sizing agent for coating transparent plate material according to claim 1 or 2, characterized in that: The coupling agent is γ-methacryloxypropyltrimethoxysilane.

7. The glass fiber sizing for transparent plate coating according to claim 1 or 2, characterized in that: The lubricant is a polyethylene glycol type nonionic surfactant.

8. The glass fiber sizing agent for coating transparent plate material according to claim 1 or 2, characterized in that: The antistatic agent is lithium chloride.

9. The method for preparing the glass fiber sizing for transparent plate coating according to any one of claims 1 to 8, characterized in that: The following steps are involved: Add 35-45% deionized water into the preparation tank at room temperature, then add glacial acetic acid and stir to make the pH value 3.5-4.5, add the coupling agent linearly and stir until the water is clear, transparent and has no oil film, then add the coupling agent, then add the film-forming agent diluted 2 times, add deionized water to prepare 85% of the total amount of the wetting agent and stir for 20-40 minutes, determine the solid content of the emulsion and add water to obtain the glass fiber wetting agent for transparent plate coating.

10. The method for preparing the glass fiber sizing for coating transparent plate material according to claim 9, characterized in that: In the glass fiber sizing agent for coating the transparent plate, the solid content of the emulsion is 3.8±0.15%, and the pH value of the emulsion is 4-6.

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