Glass fiber impregnating agent composition, glass fiber impregnating agent, preparation method and application thereof
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JUSHI GRP CO
- Filing Date
- 2024-09-30
- Publication Date
- 2026-06-30
AI Technical Summary
In the existing technology, the dispersion effect of glass fiber in gypsum or white water is poor, which results in the glass fiber not being fully and uniformly dispersed in gypsum materials, thus limiting its application range.
A glass fiber sizing agent composition comprising a dispersant, a lubricant, an antistatic agent, and water is used. By controlling the proportions of each component and the mixing method, a glass fiber sizing agent is formed, optimizing its dispersion effect in aqueous solution.
It improves the dispersion and strength of glass fiber in gypsum, ensures the surface density of glass fiber mat, and meets market demands.
Smart Images
Figure BDA0005071218290000091 
Figure BDA0005071218290000092 
Figure BDA0005071218290000101
Abstract
Description
Technical Field
[0001] This invention relates to the field of glass fiber sizing agent technology, and more specifically, to a glass fiber sizing agent composition, a glass fiber sizing agent, its preparation method, and its application. Background Technology
[0002] Adding glass fibers to gypsum board improves its elasticity and flexibility, making it less prone to damage during transportation and processing. Furthermore, as glass fibers are inorganic, they are non-flammable and chemically resistant, significantly enhancing safety and extending the lifespan of gypsum materials. Currently, glass fiber reinforced gypsum materials are widely used in building materials, most commonly in gypsum board and gypsum wall panels. Glass fiber mat is used in epoxy-coated copper plates and electrical insulation products. It features high heat resistance, good thermal insulation, high sound absorption, high exhaust gas purification efficiency, corrosion resistance, insect and mildew resistance, low absorption rate, good vibration resistance, flame retardancy, and lightweight properties. Glass fiber mat is primarily used as a base material for roofing waterproofing materials.
[0003] Modified bitumen-impregnated wood-resistant membranes possess characteristics such as corrosion resistance, high strength, good wood-impregnation properties, good dimensional stability, high porosity, and ease of impregnation with bitumen. By adding reinforcing ribs across the entire width of the glass fiber mat, the longitudinal strength and tear resistance of the glass fiber mat can be improved. With the deepening development of the materials industry, the application requirements of glass fiber reinforced gypsum composites and glass fiber mats are constantly increasing, and the limitations imposed by the inherent properties of the materials themselves are becoming increasingly apparent.
[0004] As a reinforcing material, ordinary glass fiber surface treatment agents can disperse glass fibers to a certain extent in gypsum slurry or white water, but cannot achieve monofilament dispersion. This results in insufficient and uneven dispersion of glass fibers in gypsum. For glass fiber mats, insufficient dispersion leads to problems such as fiber bundles, uneven voids, or uneven mat weight on the mat surface. This greatly limits the application of glass fibers in gypsum and glass fiber mat fields. Therefore, developing a highly dispersible sizing agent for chopped glass fiber filaments to improve the dispersion of glass fibers in gypsum or white water is crucial for further expanding the application areas of this material. Summary of the Invention
[0005] The main objective of this invention is to provide a glass fiber sizing agent composition, a glass fiber sizing agent, a method for preparing the same, and its application, in order to solve the problem of poor dispersion of glass fibers in gypsum or white water in the prior art.
[0006] To achieve the above objectives, according to one aspect of the present invention, a glass fiber sizing agent composition is provided, comprising a dispersant, a lubricant, an antistatic agent, and water, wherein the solid content of the glass fiber sizing agent composition is 0.1% to 5%, and by weight, the glass fiber sizing agent composition comprises 0.1 to 10 parts of a first dispersant, 0.1 to 10 parts of a second dispersant, 0.1 to 10 parts of a third dispersant, 0.1 to 10 parts of a lubricant, and 0.1 to 10 parts of an antistatic agent; wherein the first dispersant is sodium dodecyl sulfate; the second dispersant is polyvinyl alcohol; and the third dispersant is a fixing agent, type G diaminoformaldehyde resin pre-condensate acetate.
[0007] Further, by weight, the above-mentioned glass fiber impregnating agent composition comprises 0.3 to 8 parts of a first dispersant, 0.3 to 8 parts of a second dispersant, 0.3 to 8 parts of a third dispersant, 0.3 to 8 parts of a lubricant, and 0.3 to 8 parts of an antistatic agent; preferably, the glass fiber impregnating agent composition comprises 0.5 to 6 parts of a first dispersant, 0.5 to 6 parts of a second dispersant, 0.5 to 6 parts of a third dispersant, 0.5 to 6 parts of a lubricant, and 0.5 to 6 parts of an antistatic agent; further preferably, the glass fiber impregnating agent composition comprises 0.6 to 5 parts of a first dispersant, 0.6 to 5 parts of a second dispersant, 0.6 to 5 parts of a third dispersant, 0.6 to 4 parts of a lubricant, and 0.5 to 4 parts of an antistatic agent.
[0008] Furthermore, the mass ratio of the first dispersant, the second dispersant and the third dispersant is 1-3:1-3:1-3.
[0009] Furthermore, the relative molecular mass of the above-mentioned polyvinyl alcohol is 6000 to 30000; and / or the relative molecular mass of the fixing agent G-type diamine formaldehyde resin primary condensate acetate is 150 to 300.
[0010] Furthermore, the above-mentioned lubricant is polyethylene glycol, and the relative molecular mass of polyethylene glycol is 100 to 10000, preferably 200 to 6000, and more preferably 400 to 2000.
[0011] Furthermore, the antistatic agent is a water-soluble quaternary ammonium salt, which is selected from any one or more of poly(dodecyl dimethyl benzyl ammonium chloride) solution, tetradecyl dimethyl benzyl ammonium chloride solution, tetrabutylammonium hydroxide solution, and hexadecyl dimethyl benzyl ammonium chloride solution.
[0012] According to another aspect of the present invention, a glass fiber sizing agent is provided, which is prepared by mixing an sizing agent composition, wherein the sizing agent composition is the aforementioned glass fiber sizing agent composition, and wherein the pH value of the glass fiber sizing agent is 4 to 10, preferably 5 to 7.
[0013] According to another aspect of the present invention, a method for preparing a glass fiber sizing agent is provided. The method includes: step S1, hydrolyzing a raw material comprising a first dispersant, a second dispersant, a third dispersant, and water to obtain a first mixture; step S2, diluting and mixing a raw material comprising a lubricant, an antistatic agent, and water to obtain a second mixture; and step S3, stirring and mixing the first mixture and the second mixture to obtain a glass fiber sizing agent. Step S1 includes: performing a first hydrolysis of the second dispersant with water to obtain a first hydrolysis product; performing a second hydrolysis of the first dispersant with water to obtain a second hydrolysis product, and mixing the first hydrolysis product with the second hydrolysis product to obtain an intermediate hydrolysis product; performing a third hydrolysis of the third dispersant with water to obtain a third hydrolysis product, and mixing the third hydrolysis product with the intermediate hydrolysis product to obtain the first mixture; wherein the temperatures of the first, second, and third hydrolysis are each independently 80–90°C, and / or the times of the first, second, and third hydrolysis are each independently 10–20 min.
[0014] Further, step S2 includes: performing a first dilution treatment and a second dilution treatment on the lubricant and the antistatic agent respectively using water to obtain a lubricant liquid and an antistatic agent liquid; and / or, the temperature of the first dilution treatment and the second dilution treatment are each independently 20-30°C, and / or, the time of the first dilution treatment and the second dilution treatment are each independently 10-20 min; and / or step S3 includes: mixing the first mixture sequentially with the lubricant liquid and the antistatic agent liquid to obtain a glass fiber impregnating agent.
[0015] According to another aspect of the present invention, a glass fiber produced by coating with the aforementioned glass fiber sizing agent is provided.
[0016] According to another aspect of the invention, the application of the above-described glass fiber impregnating agent in gypsum is provided.
[0017] In applying the technical solution of this invention, the dispersant, as the main component of the glass fiber sizing agent, plays an important role not only in the uniform dispersion of the fibers but also in the strength of glass fiber reinforced gypsum and the quality of the glass fiber mat surface. This application employs three different types of dispersants: sodium dodecyl sulfate is an anionic dispersant with a negative charge; the fixing agent, type G diaminoformaldehyde resin pre-condensate acetate, is a cationic dispersant with a positive charge; and polyvinyl alcohol is a nonionic dispersant without a charge. By controlling the type and content of these dispersants, the positive and negative charges in the glass fiber sizing agent are balanced, thereby improving the dispersion effect of the glass fiber sizing agent. Simultaneously, the nonionic polyvinyl alcohol can improve both the dispersion and buffering effects of the glass fiber sizing agent. If its proportion is too low, it will lead to local charge imbalance in the glass fiber sizing agent. Therefore, the preferred content of the above three dispersants helps to improve their synergistic effect, thereby achieving optimal dispersibility of the glass fiber sizing agent. On the one hand, the chopped glass fiber filaments treated with the above-mentioned glass fiber sizing agent have strong applicability to reinforce gypsum, good dispersion effect, and uniform strength properties of the finished product. On the other hand, the chopped glass fiber filaments treated with the sizing agent described in this invention have good dispersion effect in glass fiber mat, no glass fiber bundles on the mat surface, good surface density, and meet market and application requirements. Detailed Implementation
[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the embodiments.
[0019] As analyzed in the background section of this application, the prior art suffers from poor dispersion of glass fibers in gypsum or white water. To address this issue, this application provides a glass fiber sizing agent composition, a glass fiber sizing agent, its preparation method, and its application.
[0020] In a typical embodiment of this application, a glass fiber sizing agent composition is provided, comprising a dispersant, a lubricant, an antistatic agent, and water. The solid content of the glass fiber sizing agent composition is 0.1% to 5%. By weight, the glass fiber sizing agent composition comprises: 0.1 to 10 parts of a first dispersant, 0.1 to 10 parts of a second dispersant, 0.1 to 10 parts of a third dispersant, 0.1 to 10 parts of a lubricant, and 0.1 to 10 parts of an antistatic agent; wherein the first dispersant is sodium dodecyl sulfate; the second dispersant is polyvinyl alcohol; and the third dispersant is a fixing agent, type G diaminoformaldehyde resin pre-condensate acetate.
[0021] As a major component of glass fiber sizing agents, dispersants play a crucial role not only in the uniform dispersion of fibers but also in the strength of glass fiber reinforced gypsum and the quality of glass fiber mat surfaces. This application employs three different types of dispersants: sodium dodecyl sulfate, an anionic dispersant carrying a negative charge; diaminoformaldehyde resin pre-condensate acetate, a type G fixing agent, a cationic dispersant carrying a positive charge; and polyvinyl alcohol, a nonionic dispersant without a charge. By controlling the type and content of these dispersants, a balance of positive and negative charges in the glass fiber sizing agent is achieved, thereby improving the dispersion effect. Simultaneously, nonionic polyvinyl alcohol can enhance both the dispersion and buffering effects of the glass fiber sizing agent. Too low a proportion can lead to localized charge imbalances in the glass fiber sizing agent. Therefore, the preferred content of these three dispersants helps to improve their synergistic effect, resulting in optimal dispersibility of the glass fiber sizing agent. On the one hand, the chopped glass fiber filaments treated with the above-mentioned glass fiber sizing agent have strong applicability to reinforce gypsum, good dispersion effect, and uniform strength properties of the finished product. On the other hand, the chopped glass fiber filaments treated with the sizing agent of this invention have good dispersion effect in glass fiber mat, no glass fiber bundles on the mat surface, good surface density, and meet market and application requirements.
[0022] In one embodiment of this application, the glass fiber impregnating agent composition comprises, by weight, 0.3 to 8 parts of a first dispersant, 0.3 to 8 parts of a second dispersant, 0.3 to 8 parts of a third dispersant, 0.3 to 8 parts of a lubricant, and 0.3 to 8 parts of an antistatic agent; preferably, the glass fiber impregnating agent composition comprises 0.5 to 6 parts of a first dispersant, 0.5 to 6 parts of a second dispersant, 0.5 to 6 parts of a third dispersant, 0.5 to 6 parts of a lubricant, and 0.5 to 6 parts of an antistatic agent; further preferably, the glass fiber impregnating agent composition comprises 0.6 to 5 parts of a first dispersant, 0.6 to 5 parts of a second dispersant, 0.6 to 5 parts of a third dispersant, 0.6 to 4 parts of a lubricant, and 0.5 to 4 parts of an antistatic agent.
[0023] Preferably, the weight fraction of each component in the glass fiber sizing agent composition is controlled within the above-mentioned range. In an aqueous solution environment, this facilitates the formation of a very smooth mold on the surface of the glass fiber by the active functional groups of each dispersant, thereby significantly reducing the adhesion between glass fibers and thus achieving the dispersion effect of glass fibers in aqueous solution, achieving the effect of fiber monofilamentization; at the same time, it can also take into account the protection of glass fibers, thereby improving the dispersion performance of glass fibers in subsequent processing.
[0024] In one embodiment of this application, the mass ratio of the first dispersant, the second dispersant and the third dispersant is 1-3:1-3:1-3.
[0025] By controlling the mass ratio of the first dispersant, the second dispersant, and the third dispersant within the above-mentioned range, it is more conducive to promoting the balance of positive and negative charges in the glass fiber impregnating agent, thereby improving the dispersion effect of glass fiber in gypsum or white water, and thus achieving the monofilamentization of glass fiber.
[0026] In one embodiment of this application, the relative molecular mass of the polyvinyl alcohol is 6,000 to 30,000; and / or the relative molecular mass of the fixing agent G-type diamine formaldehyde resin primary condensate acetate is 150 to 300.
[0027] By controlling the molecular weights of polyvinyl alcohol and the fixing agent G-type diamine formaldehyde resin prepolymer acetate within the above-mentioned ranges, it is beneficial to improve the dispersion effect of glass fiber in aqueous solution and also to promote the stability of the entire dispersion system.
[0028] In one embodiment of this application, the lubricant is polyethylene glycol, and the relative molecular mass of polyethylene glycol is 100 to 10,000, preferably 200 to 6,000, and more preferably 400 to 2,000.
[0029] The preferred lubricant in this application is polyethylene glycol, and controlling the relative molecular mass of polyethylene glycol within the above-mentioned range helps to reduce the amount of wear on the surface of glass fiber during production and processing, thereby improving the smoothness of glass fiber use.
[0030] In one embodiment of this application, the antistatic agent is a water-soluble quaternary ammonium salt, which is selected from any one or more of poly(dodecyl dimethyl benzyl ammonium chloride) solution, tetradecyl dimethyl benzyl ammonium chloride solution, tetrabutylammonium hydroxide solution, and hexadecyl dimethyl benzyl ammonium chloride solution.
[0031] The antistatic agent in this application is a water-soluble quaternary ammonium salt, and the preferred type of antistatic agent is beneficial to reduce the risk of poor dispersibility due to glass fiber agglomeration during processing, thereby helping the glass fiber to maintain a good dispersion effect after monofilament dispersion.
[0032] In another typical embodiment of this application, a glass fiber sizing agent is provided, which is prepared by mixing a sizing agent composition, wherein the sizing agent composition is the aforementioned glass fiber sizing agent composition, and the pH value of the glass fiber sizing agent is 4 to 10, preferably 5 to 7.
[0033] The glass fiber sizing agent obtained from the above-described sizing agent composition of this application has excellent dispersibility. Preferably, controlling the pH value of the glass fiber sizing agent within the above-described range is beneficial for promoting the uniform dispersion of each component of the dispersant glass fiber sizing agent composition, thereby avoiding precipitation or stratification due to improper pH value, and thus ensuring the overall uniformity and stability of the glass fiber sizing agent.
[0034] In another typical embodiment of this application, a method for preparing a glass fiber sizing agent is provided. The method includes: step S1, hydrolyzing raw materials comprising a first dispersant, a second dispersant, a third dispersant, and water to obtain a first mixture; step S2, diluting and mixing raw materials comprising a lubricant, an antistatic agent, and water to obtain a second mixture; and step S3, stirring and mixing the first mixture and the second mixture to obtain a glass fiber sizing agent. Step S1 includes: performing a first hydrolysis of the second dispersant with water to obtain a first hydrolysis product; performing a second hydrolysis of the first dispersant with water to obtain a second hydrolysis product, and mixing the first hydrolysis product and the second hydrolysis product to obtain an intermediate hydrolysis product; performing a third hydrolysis of the third dispersant with water to obtain a third hydrolysis product, and mixing the third hydrolysis product and the intermediate hydrolysis product to obtain the first mixture; wherein the temperatures of the first, second, and third hydrolysis are each independently 80–90°C, and / or the times of the first, second, and third hydrolysis are each independently 10–20 min.
[0035] The stepwise mixing method described above in this application facilitates more thorough mixing of the components in the glass fiber sizing agent, thereby improving the dispersion effect and efficiency of each component in the glass fiber sizing agent composition. Specifically, the preferred hydrolysis conditions and hydrolysis sequence enhance the efficiency and effectiveness of the hydrolysis of the first, second, and third dispersants in water, further promoting more thorough mixing of the components in the glass fiber sizing agent.
[0036] In one embodiment of this application, step S2 includes: performing a first dilution treatment and a second dilution treatment on the lubricant and the antistatic agent respectively using water to obtain a lubricant liquid and an antistatic agent liquid; and / or, the temperature of the first dilution treatment and the second dilution treatment are each independently 20-30°C, and / or, the time of the first dilution treatment and the second dilution treatment are each independently 10-20 min; and / or step S3 includes: mixing the first mixture sequentially with the lubricant liquid and the antistatic agent liquid to obtain a glass fiber impregnating agent.
[0037] The preferred dilution conditions described above help improve the efficiency and effectiveness of diluting the lubricant and antistatic agent in water. The diluted lubricant and antistatic agent are easier to mix evenly with other components in the glass fiber sizing agent, reducing precipitation or stratification. This makes it easier to evenly coat the glass fiber sizing agent onto the glass fiber surface, thereby improving the dispersion effect of the glass fiber in the aqueous solution.
[0038] In another typical embodiment of this application, a glass fiber produced by coating with the aforementioned glass fiber sizing agent is provided.
[0039] The glass fiber chopped filaments treated with the sizing agent described in this invention can enhance the applicability of gypsum materials and glass fiber mats, making processing and use smooth. The glass fiber has excellent dispersion effect in gypsum slurry or white water dispersion of glass fiber mat, which can simultaneously meet the needs of these two major markets and applications.
[0040] In another typical embodiment of this application, the application of the above-described glass fiber impregnating agent in gypsum is provided.
[0041] Applying the aforementioned glass fiber impregnating agent to gypsum helps enhance the applicability of gypsum materials and glass fiber mats, ensuring smooth processing and use, and providing excellent dispersion of glass fiber in gypsum slurry.
[0042] The beneficial effects of this application will be further illustrated below with reference to the embodiments.
[0043] The raw materials of each component in the glass fiber impregnating agent composition used in Examples 1-17 of the present invention are as follows:
[0044] The first dispersant used is sodium dodecyl sulfate;
[0045] The second dispersant used is polyvinyl alcohol;
[0046] The third dispersant uses a fixing agent G-type diamine formaldehyde resin pre-condensate acetate (manufacturer: Hangzhou Electrochemical Group Additives and Chemicals Co., Ltd., model: fixing agent G);
[0047] The lubricant used is polyethylene glycol;
[0048] The quaternary ammonium salt antistatic agent is a tetrabutylammonium hydroxide solution with a mass concentration of approximately 10 wt%.
[0049] The specific method for obtaining the glass fiber sizing agent from the above glass fiber sizing agent composition is as follows:
[0050] In a clean container, add sodium dodecyl sulfate that has been hydrolyzed for 10 minutes in 5-10 times its volume of deionized water at 80°C, then add polyvinyl alcohol that has been hydrolyzed for 10 minutes in 10 times its volume of deionized water at 80°C, then add color-fixing agent G-type diamine formaldehyde resin pre-condensate acetate that has been hydrolyzed for 10 minutes in 10 times its volume of deionized water at 80°C, then add polyethylene glycol that has been diluted with 5 times its volume of room temperature deionized water, then add antistatic agent that has been diluted and dissolved with 20 times its volume of room temperature deionized water, and finally add the wetting agent to the set value with room temperature deionized water, and stir thoroughly for 30 minutes before use.
[0051] Table 1 below shows the specific formulations of Examples 1 to 12. The values of the wetting agent components are all mass parts of each component.
[0052] Example 13
[0053] The difference from Example 10 is that the mass ratio of the first dispersant, the second dispersant and the third dispersant is 1:2:1, and a glass fiber impregnating agent is finally obtained.
[0054] Example 14
[0055] The difference from Example 10 is that the mass ratio of the first dispersant, the second dispersant and the third dispersant is 1:4:1, and a glass fiber impregnating agent is finally obtained.
[0056] Example 15
[0057] The difference from Example 10 is that the first dispersant used is sodium dodecyl sulfate, 0.7 parts;
[0058] The second dispersant used is polyvinyl alcohol, 0.7 parts;
[0059] The third dispersant is a fixing agent, 0.7 parts of G-type diamine formaldehyde resin pre-condensate acetate;
[0060] The lubricant is methyl silicone oil with a molecular weight of 210, 0.7 parts;
[0061] The antistatic agent is a tetrabutylammonium hydroxide solution with a mass concentration of approximately 10 wt%, 0.7 parts, which ultimately yields a glass fiber impregnating agent.
[0062] Example 16
[0063] The difference from Example 10 is that the first dispersant used is sodium dodecyl sulfate, 0.7 parts;
[0064] The second dispersant used is polyvinyl alcohol, 0.7 parts;
[0065] The third dispersant is a fixing agent, 0.7 parts of G-type diamine formaldehyde resin pre-condensate acetate;
[0066] The lubricant is pentaerythritol, molecular weight 136, 0.7 parts:
[0067] The antistatic agent is a tetrabutylammonium hydroxide solution with a mass concentration of approximately 10 wt%, 0.7 parts, which ultimately yields a glass fiber impregnating agent.
[0068] Example 17
[0069] The difference from Example 10 is that the first dispersant used is sodium dodecyl sulfate, 0.7 parts;
[0070] The second dispersant used is polyvinyl alcohol, 0.7 parts;
[0071] The third dispersant is a fixing agent, 0.7 parts of G-type diamine formaldehyde resin pre-condensate acetate;
[0072] The lubricant is magnesium dodecyl sulfate, molecular weight 555, 0.7 parts;
[0073] The antistatic agent is a tetrabutylammonium hydroxide solution with a mass concentration of approximately 10 wt%, 0.7 parts, which ultimately yields a glass fiber impregnating agent.
[0074] To further demonstrate the beneficial effects of the present invention, the performance of an impregnating agent for gypsum and wet-process glass fiber mat made from chopped glass fiber strands according to embodiments of the present invention was compared with that of impregnating agents with different formulation combinations. The specific results are shown in Table 2. The formulations of the impregnating agents in each comparative example are as follows:
[0075] Comparative Example 1
[0076] The difference from Example 10 is that the first dispersant used is sodium polyacrylate, 0.7 parts;
[0077] Use polyacrylate, 0.7 parts;
[0078] The second dispersant used is polyvinyl alcohol, 0.7 parts;
[0079] The third dispersant is a fixing agent, 0.7 parts of G-type diamine formaldehyde resin pre-condensate acetate;
[0080] The lubricant is polyethylene glycol with a molecular weight of 1000, 0.7 parts;
[0081] The antistatic agent is a tetrabutylammonium hydroxide solution with a mass concentration of approximately 10 wt%, 0.7 parts, which ultimately yields a glass fiber impregnating agent.
[0082] Comparative Example 2
[0083] The difference from Example 10 is that the first dispersant used is sodium dodecyl sulfate, 0.7 parts;
[0084] The second dispersant used is polyvinyl alcohol, 0.7 parts;
[0085] The third dispersant is trimethyloctadecyl ammonium bromide, 0.7 parts;
[0086] Lubricant: Polyethylene glycol, molecular weight 1000, 0.7 parts;
[0087] An antistatic agent, tetrabutylammonium hydroxide solution, with a mass concentration of approximately 10 wt%, is used in 0.7 parts to ultimately obtain a glass fiber impregnating agent.
[0088] Comparative Example 3
[0089] The difference from Example 10 is that the first dispersant used is sodium dodecyl sulfate, 0.7 parts;
[0090] The second dispersant used is polyvinyl alcohol, 0.7 parts;
[0091] The lubricant is polyethylene glycol with a molecular weight of 200, 0.7 parts;
[0092] The antistatic agent is a tetrabutylammonium hydroxide solution with a mass concentration of approximately 10 wt%, 0.7 parts, which ultimately yields a glass fiber impregnating agent.
[0093] Comparative Example 4
[0094] The difference from Example 10 is that the first dispersant used is polyvinyl alcohol, 0.7 parts;
[0095] The second dispersant is a fixing agent, 0.7 parts of G-type diamine formaldehyde resin pre-condensate acetate;
[0096] The lubricant is polyethylene glycol with a molecular weight of 200, 0.7 parts;
[0097] The antistatic agent is a tetrabutylammonium hydroxide solution with a mass concentration of approximately 10 wt%, 0.7 parts, which ultimately yields a glass fiber impregnating agent.
[0098] The performance test results of Comparative Examples 1 to 4 are shown in Table 2.
[0099] Performance testing:
[0100] The combustible content of the glass fiber in this invention (i.e., the proportion of the amount of sizing agent coated on the glass fiber to the mass of the glass fiber) is generally controlled at 0.01 to 0.50%. The specific value needs to be determined based on the properties of the raw material itself. From the perspective of the performance indicators that the product needs to achieve and the experimental test results, products with a combustible content of 0.01 to 0.20% can meet the requirements for dispersibility and reinforcement.
[0101] The specific test results of the chopped filaments produced according to a certain glass fiber production process are shown in Table 1.
[0102] Table 1 below shows how chopped raw fibers are added to the wet-process glass fiber dispersant "white water" according to the Q / JS J6651 standard, mixed at a ratio of 7:10000, and then stirred in a mixer to obtain a monofilamentized glass fiber solution. The solution is then passed through a 26cm diameter circular filter to remove the dispersant "white water," thus obtaining monofilamentized and dispersed glass fibers. The filter is then placed in a 105℃ oven and dried for 2 hours. The dried glass fiber mat is then separated from the filter to obtain the prepared wet-process glass fiber mat. It is cut into 5cm*15cm tensile test strips (for tensile strength testing), and the combustible content, moisture content, tensile breaking strength, and dispersibility of the glass fiber are compared according to the test standards in Table 1.
[0103] The tensile breaking strength was tested according to GB / T 6006.2-2013 standard. The larger the value, the higher the tensile strength.
[0104] Dispersion is tested according to the Q / JS J6651 standard. The smaller the value, the better the dispersion.
[0105] Table 1
[0106]
[0107] Continued from Table 1
[0108]
[0109]
[0110] Table 2
[0111]
[0112] As can be seen from the table above, by comparing the test results of Examples 1 to 17 with the test results of Comparative Examples 1 to 4, we found that the dispersant ratio and the type of lubricant have a direct impact on the dispersion effect and tensile breaking strength.
[0113] In Examples 1-6, the dispersibility was improved by reducing the ratio of dispersant and lubricant, but the improvement in dispersibility was not significant when the ratio of Example 7 was reached.
[0114] Meanwhile, according to Examples 7 and 8, after the proportion of antistatic agent decreases, the dispersibility will be further improved, and the tensile strength will tend to increase.
[0115] In Examples 9 to 11, once the ratio of dispersant, lubricant, and antistatic agent reached a certain range, especially when the three dispersants were used in a 1:1:1 ratio, both the dispersibility and tensile strength achieved relatively excellent values.
[0116] Based on the above samples, we can obtain a satisfactory wetting agent formulation by improving the dispersibility. In particular, the glass fiber reinforced wet glass fiber mat material prepared in Example 10 has the characteristics of high tensile strength and good dispersibility in white water, and its overall performance is higher than that of other comparative examples.
[0117] Examples 15-17 differ from Example 10 only in the type of lubricant. The tensile breaking strength of Examples 15-17 is lower than that of Example 10, indicating that the type of lubricant has a direct impact on the tensile breaking strength.
[0118] Comparative Examples 1, 2 and 10 all used three dispersants, but the types of dispersants were different. The dispersibility of Comparative Examples 1 and 2 was far inferior to that of Example 10, indicating that the type of dispersant has a direct impact on dispersibility.
[0119] Comparative Examples 3 and 4 differ from Example 10 not only in the type of dispersant used, but also in the use of only two dispersants. Their dispersion effect is far inferior to that of Example 10, indicating that the proportion of the three dispersants used directly affects the dispersibility and tensile strength.
[0120] In summary, the glass fiber roving treated with the sizing agent described in this invention has strong applicability to reinforce wet-laid glass fiber mat materials, is easy to process and use, produces excellent product performance, and has outstanding dispersion properties, thus meeting market and application needs.
[0121] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:
[0122] As a major component of glass fiber sizing agents, dispersants play a crucial role not only in the uniform dispersion of fibers but also in the strength of glass fiber reinforced gypsum and the quality of glass fiber mat surfaces. This application employs three different types of dispersants: sodium dodecyl sulfate, an anionic dispersant carrying a negative charge; diaminoformaldehyde resin pre-condensate acetate, a type G fixing agent, a cationic dispersant carrying a positive charge; and polyvinyl alcohol, a nonionic dispersant without a charge. By controlling the type and content of these dispersants, a balance of positive and negative charges in the glass fiber sizing agent is achieved, thereby improving the dispersion effect. Simultaneously, nonionic polyvinyl alcohol can enhance both the dispersion and buffering effects of the glass fiber sizing agent. Too low a proportion can lead to localized charge imbalances in the glass fiber sizing agent. Therefore, the preferred content of these three dispersants helps to improve their synergistic effect, resulting in optimal dispersibility of the glass fiber sizing agent. On the one hand, the chopped glass fiber filaments treated with the above-mentioned glass fiber sizing agent have strong applicability to reinforce gypsum, good dispersion effect, and uniform strength properties of the finished product. On the other hand, the chopped glass fiber filaments treated with the sizing agent described in this invention have good dispersion effect in glass fiber mat, no glass fiber bundles on the mat surface, good surface density, and meet market and application requirements.
[0123] The above are merely embodiments of the present invention and are not intended to limit the invention. Those skilled in the art will recognize that the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A glass fiber sizing composition comprising a dispersing agent, a lubricant, an antistatic agent, and water, the glass fiber sizing composition having a solids content of 0.1% to 5%, characterized in that, The glass fiber impregnating agent composition comprises, by weight parts: 0.1 to 10 parts of the first dispersant; 0.1 to 10 parts of the second dispersant; 0.1 to 10 parts of the third dispersant; 0.1 to 10 parts of the lubricant; 0.1 to 10 parts of the antistatic agent; Wherein, the first dispersant is sodium dodecyl sulfate; the second dispersant is polyvinyl alcohol; and the third dispersant is fixing agent G, which is dicyandiamide formaldehyde resin pre-condensate acetate.
2. The glass fiber sizing composition of claim 1, wherein, The glass fiber impregnating agent composition comprises, by weight parts: 0.3 to 8 parts of the first dispersant; 0.3 to 8 parts of the second dispersant; 0.3 to 8 parts of the third dispersant; 0.3 to 8 parts of the lubricant; 0.3 to 8 parts of the antistatic agent.
3. The glass fiber sizing composition of claim 2, wherein, The glass fiber impregnating agent composition comprises: 0.5 to 6 parts of the first dispersant; 0.5 to 6 parts of the second dispersant; 0.5 to 6 parts of the third dispersant; 0.5 to 6 parts of the lubricant; 0.5 to 6 parts of the antistatic agent.
4. The glass fiber sizing composition of claim 3, wherein, The glass fiber impregnating agent composition comprises: 0.6 to 5 parts of the first dispersant; 0.6 to 5 parts of the second dispersant; 0.6 to 5 parts of the third dispersant; 0.6 to 4 parts of the lubricant; 0.5 to 4 parts of the antistatic agent.
5. The glass fiber sizing composition according to any one of claims 1 to 4, characterized in that, The mass ratio of the first dispersant, the second dispersant and the third dispersant is 1~3:1~3:1~3.
6. The glass fiber sizing composition according to any one of claims 1 to 4, characterized in that, The polyvinyl alcohol has a relative molecular mass of 6,000 to 30,000; and / or the dicyandiamide-formaldehyde resin prepolymer acetate has a relative molecular mass of 150 to 300.
7. The glass fiber sizing composition according to any one of claims 1 to 4, characterized in that, The lubricant is polyethylene glycol, and the relative molecular mass of the polyethylene glycol is 100~10000.
8. The glass fiber sizing composition according to claim 7, characterized in that, The relative molecular mass of the polyethylene glycol is 200-6000.
9. The glass fiber sizing composition according to claim 8, characterized in that, The relative molecular mass of the polyethylene glycol is 400~2000.
10. The glass fiber sizing composition according to any one of claims 1 to 4, characterized in that, The antistatic agent is a water-soluble quaternary ammonium salt, which is selected from any one or more of poly(dodecyl dimethyl benzyl ammonium chloride) solution, tetradecyl dimethyl benzyl ammonium chloride solution, tetrabutylammonium hydroxide solution, and hexadecyl dimethyl benzyl ammonium chloride solution.
11. A glass fiber sizing prepared from a sizing composition mixture, characterized in that, The sizing agent composition is the glass fiber sizing agent composition according to any one of claims 1 to 10, wherein the pH value of the glass fiber sizing agent is 4 to 10.
12. The glass fiber sizing of claim 11, wherein, The pH value of the glass fiber impregnating agent is 5-7.
13. A process for preparing the glass fiber sizing agent of claim 11 or 12, characterized in that, The preparation method includes: Step S1: Hydrolyze the raw material comprising a first dispersant, a second dispersant, a third dispersant and water to obtain a first mixture; Step S2: The raw materials including lubricant, antistatic agent and water are diluted and mixed to obtain a second mixture; Step S3: Stir and mix the first mixture and the second mixture to obtain a glass fiber impregnating agent; Step S1 includes: The second dispersant is subjected to a first hydrolysis with water to obtain a first hydrolysis product; The first dispersant is subjected to a second hydrolysis with water to obtain a second hydrolysis product, and the first hydrolysis product and the second hydrolysis product are mixed to obtain an intermediate hydrolysis product; performing a third hydrolysis on the third dispersant with water to obtain a third hydrolysis product, and mixing the third hydrolysis product with the intermediate hydrolysis product to obtain the first mixture; wherein the temperature of the first hydrolysis, the second hydrolysis and the third hydrolysis is independently 80-90℃, and / or the time of the first hydrolysis, the second hydrolysis and the third hydrolysis is independently 10-20min.
14. Glass fibers coated with the glass fiber sizing of claim 11 or 12.
15. Use of the glass fiber sizing of claim 11 or 12 in gypsum.