Manufacturing method of liquid ceramic silica gel glass fiber cloth

Abstract

According to the manufacturing method of the liquid ceramic silica gel glass fiber cloth, materials such as liquid silica gel and ceramic powder are mixed to form mixed slurry, and the mixed slurry is coated on the glass fiber cloth to be cured. The liquid ceramic silica gel glass fiber cloth prepared by the preparation method disclosed by the invention is better in ceramization performance under high-temperature burning, does not melt, drop or crack during high-temperature burning, and has the advantages of no penetration during high-temperature long-time burning, flame retardance, heat insulation, fire insulation, water insulation, insulation and the like.

Description

Technical Field

[0001] The invention relates to the technical field of composite materials, and in particular to a method for preparing liquid ceramic silica gel glass fiber cloth. Background Art

[0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] In the fields of aerospace, new energy vehicles, batteries, etc., fire and thermal runaway will seriously affect the safety of the public, and there is a high demand for thermal insulation, flame retardancy, and fire prevention. Glass fiber is often used as a reinforcing material in composite materials due to its good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. It is mainly used in hulls, storage tanks, cooling towers, ships, vehicles, tanks, and building structural materials. The composite material of glass fiber cloth is a material suitable for achieving thermal insulation, flame retardancy, and fire prevention functions.

[0004] According to the inventor's understanding, although there are improvements to glass fiber cloth in the prior art to improve its flame retardancy, long-term high temperature burning-through and heat insulation properties, such as the synthesis of a new organic-inorganic hybrid flame retardant combined with glass fiber cloth in Document 1 so that it can burn at 1000°C for 30 minutes without burning through, and in Document 2, aerogel and multi-layer insulation film are pasted or sewn on glass fiber cloth to achieve the effect of heat insulation temperature of 90-350°C and burning at high temperature for 15 minutes without burning through. With the popularization of the new energy industry, the market demand for fire retardant and heat insulation has become more urgent, and the current production process of glass fiber cloth composite materials needs to be further improved.

[0005] References:

[0006] Document 1: China invention patent publication, publication number CN 118572319 A, a ceramicized silicone rubber composite belt

[0007] Document 2: China invention patent publication, publication number CN 118744585 A, a thermal insulation material and its preparation method Summary of the invention

[0008] In view of the problems in the current production process of liquid glass fiber cloth, the present invention provides a method for making liquid ceramic silicone glass fiber cloth, comprising the following steps:

[0009] S1: Preparation of the mixture

[0010] The mixture includes liquid silica gel, ceramic powder A and ceramic powder B, wherein the ceramic powder A and the ceramic powder B have been modified, the ceramic powder A includes at least one of alumina, calcium carbonate and silicates, the ceramic powder B includes at least one of glass powder, silicon dioxide and mica, and the liquid silica gel includes gas phase silica gel or precipitated silica gel.

[0011] The mass of the ceramic powder A is 30-40% of the mass of the mixture.

[0012] The mass of the ceramic powder B is 10-20% of the mass of the mixture.

[0013] The mass of the liquid silica gel is 45-55% of the mass of the mixture;

[0014] Ceramic powder modification is a method of changing the surface properties and structure of ceramic powders to improve the dispersibility, stability and compatibility of powder particles with polymers, so that they can better adapt to specific application requirements. The modification treatment of ceramic powders and the specific treatment process are common knowledge in this field, and can be adaptively adjusted with reference to common knowledge, which will not be repeated here. Before preparing the mixture, the ceramic powder can be modified by any existing modification technology, such as by mixing the ceramic powder with coupling agents, surfactants, organic oligomers, unsaturated organic acids, silicones, water-soluble polymers, and metal oxides and alcohol salts at high speed, thereby improving the dispersibility of the ceramic powder during mixing and the porcelain-forming properties during high-temperature combustion. The modified powder can form a hollow powder structure, which can achieve a strong porcelain-forming and heat-insulating effect after bonding and filling with liquid silicone.

[0015] The modified properties of ceramic powders A and B can be modified to a sieve size of not less than 300 meshes according to actual filtration, product fineness and other requirements. The sieve size is the size of the mesh holes through which particles can pass, expressed as the number of holes in a sieve with a width of 1 inch (25.4 mm), so it is also called the "mesh number". If the sieve size of the modified ceramic powder is lower than 300 meshes, it will affect the quality of subsequent coating, such as large particles agglomerating and blocking the coating machine. Experiments have found that if the sieve size of ceramic powders A and B after modification is lower than 300 meshes, problems such as coating jamming and uneven coating will occur due to excessively large particles, affecting the quality and production efficiency of normal production of liquid ceramic silicone glass fiber cloth.

[0016] The liquid silica gel used in the present invention is a basic material commonly used in the field of chemical materials, and can also be converted from solid silica gel by adding a suitable solvent. Both gas-phase silica gel and precipitated silica gel are commonly used chemical raw materials, and can be a liquid glue obtained by mixing other additives and solvents with base silica refined from vinyl silicone oil and gas-phase white carbon black. For example, the properties of the gas-phase silica gel can be tested using the GB / T 10247-1988 test standard to obtain a viscosity of 14000mPa.s, and after curing, the hardness can be tested using the GB / T 531.1-2008 test standard to obtain a hardness of 30HA; the properties of the precipitated silica gel can be tested using the GB / T 10247-1988 test standard to obtain a viscosity of 10430mPa.s, and after curing, the hardness can be tested using the GB / T 531.1-2008 test standard to obtain a hardness of 30HA. Precipitated silica gel can make the prepared mixture more viscous so that it can better adhere to the glass fiber cloth. The coating of the obtained liquid ceramic silicone glass fiber cloth will not crack or drip during high-temperature combustion; vapor phase silica gel can enhance the tensile strength, elongation and tear strength of liquid ceramic silicone glass fiber cloth, so technical personnel in this field can choose precipitated silica gel or vapor phase silica gel according to actual needs.

[0017] The mixing method in the present invention can be carried out by manual stirring, using a planetary stirrer or a small mixer to achieve uniform mixing. Using different stirring methods may only affect the production efficiency, but does not significantly affect the performance of the liquid ceramic silicone glass fiber cloth.

[0018] S2: diluting the mixture;

[0019] The dilution method can be achieved through existing materials or methods, and the specific principles need not be elaborated.

[0020] S3: Add curing agent and mix;

[0021] The curing agent in the present invention is also called a vulcanizing agent, a platinum catalyst, etc., and is divided into a room temperature curing agent and a heating curing agent. Under certain temperature conditions, the room temperature curing agent can cause the coating slurry to undergo a silicon hydrogen catalytic addition reaction and solidify, and form a three-dimensional network structure between molecules, thereby improving the hardness and aging resistance of the silica gel. The room temperature curing agent can also be replaced by other existing heating curing agents, such as aliphatic amines, vinyl triamine, etc.; if heating curing is not used, the curing agent can be replaced by a room temperature curing agent, such as epoxy resin, ethylenediamine, etc.

[0022] S4: coated on glass fiber cloth;

[0023] In this embodiment, the glass fiber cloth does not need to be particularly limited, and the corresponding glass fiber cloth can be purchased according to actual needs such as thickness.

[0024] S5: curing the glass fiber cloth coated in S4.

[0025] The curing method in the present invention does not need to be particularly limited, and can be achieved by using an oven, a tunnel drying machine, natural curing, etc.

[0026] Further, the temperature of the mixture in S1 is 20-35°C. Further, the temperature of the mixture in S1 is 22-25°C. The temperature in the present invention does not exclude values ​​outside the description range, because the temperature of the mixture may be lower than 20°C or higher than 35°C due to stirring or cooling during the preparation process. In the present invention, it is preferred to control the temperature of the slurry to be finally mixed to 22-25°C. The properties and uniformity of the mixture formed by stirring within this range are relatively ideal, but the slurry is not excluded from other temperatures. During the mixing process, if the temperature of the mixture is lower than 20°C, it may cause uneven mixing, and the presence of large particles in the mixture may affect the coating; since the mixture slurry continuously releases heat under high-speed stirring, if the temperature of the mixture is higher than 35°C, the silica gel component therein will age and lose the bonding effect. Existing methods or equipment can achieve temperature control, such as connecting cold water to the outside of the mixing barrel wall to avoid a rapid increase in the temperature of the mixture.

[0027] Further, the mixing condition in S1-S3 is stirring, and the stirring speed is 20-30RPM. Further, the stirring also includes a dispersion speed of 30-40RPM. Setting the stirring speed can make the slurry mixed, and setting the dispersion speed can make the materials in different states evenly dispersed in the overall slurry, such as in the case of solid-liquid mixing, liquid-liquid mixing, oil-water dispersion, and dispersion homogenization, the mixing stirring speed and the dispersion stirring speed can be adjusted as needed. By adjusting the dispersion speed, the ceramic powder particles can be evenly dispersed in the slurry, and the subsequent coating effect and uniformity are better. However, due to the exothermic reaction in the slurry during rapid stirring, the slurry temperature rises. If it exceeds 35°C, it will cause the silica gel to age faster and affect the thermal insulation performance. According to the test, the stirring speed cannot be higher than 30RPM, and the dispersion speed cannot be higher than 40RPM. According to the test, it was also found that a stirring speed lower than 20RPM and a dispersion speed lower than 30RPM will lead to uneven mixing, excessive viscosity of the slurry affecting the uniformity of coating, and other problems.

[0028] Furthermore, it is characterized in that the sieve particle size of the ceramic powder A and the ceramic powder B is not less than 300 meshes, and the oil absorption value is 40-60mL / 100mg. The sieve particle size and oil absorption value of the ceramic powder will affect the coating effect and the performance of the liquid ceramic silicone glass fiber cloth after coating. The sieve particle size will affect the uniformity of mixing and the fineness of the finished product. If the sieve particle size is less than 300 meshes, the particles in the mixture will be too large to mix evenly, and the surface of the coated glass fiber cloth may be uneven, reducing electrical properties such as breakdown resistance; the oil absorption value will affect the adhesion of the ceramic powder to the liquid silicone. If the oil absorption value is too low, the adhesion of the ceramic powder will be reduced, affecting the overall porcelain-forming performance. If the oil absorption value is too high, the mixture will be too thick, affecting the coating effect, and then affecting the flame retardant and heat insulation properties of the finished product.

[0029] Furthermore, the method of diluting the mixture in S2 is to add a diluent to the mixture. The diluent is a commonly used material in industry, which can dilute a relatively thick slurry to a desired concentration. The present invention does not need to limit the type of diluent, as long as it can play a diluting role.

[0030] Furthermore, the mass of the diluent is 10-50% of the mass of the mixture. The mass of the diluent should not be too high or too low, otherwise the concentration of the mixture may be too low or too thick, which will affect the subsequent coating effect and further affect the thermal insulation and fireproofing performance of the finished product.

[0031] Furthermore, the diluent is at least one of epoxy resin, aromatic hydrocarbons, ketones and alcohols. Furthermore, the diluent is D40 solvent oil.

[0032] The diluent D40 solvent oil in the present invention is called propylene oxide diluent D40, also called propylene oxide polyether D40, which is a commonly used epoxy resin diluent. Commonly used diluents include epoxy resins, aromatic hydrocarbons, ketones, alcohols, ethyl acetate, etc. One or more diluents can be added as needed to achieve a dilution effect, increase the fluidity of the mixed slurry, and facilitate subsequent coating operations. Those skilled in the art can also determine the mass of the diluent added based on the specific type of diluent selected, the amount of liquid silicone, and the thickness required for coating. It has been found through testing that if the proportion of the diluent added to the mixture is higher than 50%, the mixed slurry is difficult to solidify in step S5, greatly reducing the production efficiency; if the proportion of the diluent added to the mixture is lower than 10%, it will result in insufficient dilution, excessive viscosity of the slurry, and sticking to the wall during the production process, resulting in greatly increased losses, and it is difficult to apply evenly during subsequent coating.

[0033] Furthermore, S2 further includes: mixing the mixture with a color paste. Furthermore, the color paste is added before the mixture is diluted. The color paste can be added before, during or after dilution, but adding the color paste and then diluting will make the color of the mixture slurry lighter and have no effect on the performance of the ceramic silicone rubber glass fiber cloth.

[0034] Furthermore, S2 also includes: defoaming the mixture. Furthermore, the defoaming method is to mix the mixture with an oily defoamer, and the mass of the oily defoamer is 0.2-3% of the mass of the mixture. Defoamers can reduce the surface tension of water, solutions, suspensions, etc., prevent foam formation, and are widely used, such as in the food industry, coating industry, rubber latex industry, aerosol industry, daily chemical industry, pharmaceutical industry, etc. The present invention does not exclude the solution in which the mass of the oily defoamer is higher than 3% of the mass of the mixture or lower than 0.2% of the mass of the mixture. The mass of the defoamer is higher than 3% and only affects the viscosity of the slurry. The slurry with a mass of the defoamer lower than 0.2% will have other defects such as shrinkage cavities, pinholes, bubbles, etc., resulting in reduced quality, but it does not affect the implementation of the solution. Other commonly used defoamers, such as industrial defoamers, can also be selected, and the type and quality of the defoamer can be selected according to the defoaming speed and effect actually required. Adding a defoaming agent before, after or at the same time as dilution can significantly speed up the removal of bubbles in the mixed solution. Standing defoaming can also be used. As long as the defoaming is sufficient, there is no obvious difference in the performance of the ceramic silicone glass fiber cloth by standing defoaming or adding a defoaming agent.

[0035] Furthermore, the step S3 further comprises: mixing the mixture with an anchoring agent. Furthermore, the mass of the anchoring agent is 1-3% of the mass of the mixture.

[0036] Anchoring agents are usually used in coating, bonding, sealing and other occasions to improve the stability and durability of the product. Adding anchoring agents to the mixture can improve the adhesion of ceramic powder to a certain extent. When the added mass is 1-2% of the mass of the mixture, the slurry can have a better adhesion effect, but the adhesion effect is lower than the case where the added mass of the anchoring agent is 2% of the mass of the mixture. The glue may fall off during the production process, but it has no obvious effect on the thermal insulation and fireproof properties of the finished product. When the mass of the added anchoring agent is higher than 3% of the mass of the liquid silicone, pinholes and shrinkage holes are prone to appear on the glue surface, reducing the quality of the product. Generally speaking, the anchoring agent can be added at any time in step S2, but in order to give full play to the role of the anchoring agent, it is preferably added after the diluent is added and before the curing agent is added.

[0037] Further, the mass of the curing agent is 0.5-4% of the mass of the mixture. Further, before S4, the mixture is filtered. Further, the mixture slurry is filtered through a filter screen, and the number of holes of the filter screen is 100-300 meshes. By filtering, impurities in the mixture can be screened out, and the sieved particle size in the mixture can be screened to prevent the powder with too large particles from affecting the coating effect.

[0038] Furthermore, the coating method is blade coating, which can be implemented by applying methods and equipment such as manual coating and mechanical coating in the prior art, and no further description is needed.

[0039] Furthermore, the curing method described in S5 is heating. Furthermore, the heating condition is segmented heating: the temperature of the first heating section is 50-100°C, and the temperature of the second heating section is 100-200°C. The heating temperature can be adjusted according to the coating speed, whether there is exhaust in the heating box, the number of sections of the heating box, etc. Since the boiling point of the diluent is relatively low, if the first temperature section is set to below 50°C, the diluent will not evaporate sufficiently. In the second temperature section, the curing of the slurry will cause the volatilization of the residual diluent, which may cause bulging on the surface of the product; if the second temperature section is set to exceed 200°C, the mixed slurry may age due to excessive temperature, thereby reducing the yield rate.

[0040] As another aspect of the present invention, a method for preparing liquid ceramic silica glass fiber cloth is provided, comprising the following steps:

[0041] S1: Modify ceramic powder A and ceramic powder B, wherein ceramic powder A contains at least one of alumina, calcium carbonate, and silicate, and ceramic powder B contains at least one of glass powder, silicon dioxide, and mica; the sieve particle size of the modified ceramic powder A and the ceramic powder B is not less than 500 mesh, and the oil absorption value is 40-60mL / 100mg.

[0042] S2: Preparation of the mixture

[0043] The mixture includes liquid silica gel, the modified ceramic powder A and the modified ceramic powder B, the liquid silica gel includes gas phase silica gel or precipitated silica gel,

[0044] The mass of the ceramic powder A is 30-40% of the mass of the mixture.

[0045] The mass of the ceramic powder B is 10-20% of the mass of the mixture.

[0046] The mass of the liquid silica gel is 45-55% of the mass of the mixture;

[0047] The mixing method of the mixture is stirring, the temperature of the rubber material is 22°C-25°C, the stirring speed is 22-28RPM, and the dispersion speed is 32-38RPM;

[0048] S3: mixing the mixture, D40 solvent oil and oily defoaming agent, wherein the mass of D40 solvent oil is 15-25% of the mass of the mixture, and the mass of the oily defoaming agent is 0.2-0.7% of the mass of the mixture.

[0049] S4: Add color paste and mix;

[0050] S5: adding an anchoring agent to mix, wherein the mass of the anchoring agent is 1.5-2.5% of the mass of the mixture;

[0051] S6: adding a curing agent and mixing, wherein the mass of the curing agent is 0.5-1.5% of the mass of the mixture;

[0052] S7: Filtering with a filter screen, wherein the number of holes of the filter screen is 200-300 meshes;

[0053] S8: coating on glass fiber cloth, the coating method is doctor blade coating;

[0054] S9: The glass fiber cloth coated in S8 is heated and cured in sections, wherein the temperature of the first heating section is 70-90°C, and the temperature of the second heating section is 110-170°C.

[0055] The limitations on relevant numerical values ​​in the above description do not absolutely exclude numerical values ​​outside the described range. In order to circumvent the protection scheme of this patent, those skilled in the art may choose to adjust the relevant numerical values ​​within a small range in order to circumvent the protection of this patent by reducing production capacity and / or reducing product quality, which should be regarded as equivalent to infringement.

[0056] In addition, in order to circumvent the protection scheme of this patent, technical personnel in this field may also replace the substances used in this patent with similar substances with similar functions and effects, which should also be regarded as equivalent infringement.

[0057] The present invention has the following technical effects:

[0058] The present invention utilizes materials such as liquid silica gel and ceramic powder to manufacture ceramicized silicone rubber glass fiber cloth, adopts a reasonable ratio, and coats the mixture slurry on the glass fiber to form a tight fireproof layer, which can significantly improve the flame retardancy, burn-through resistance, cracking or dripping resistance, and heat insulation effects of the ceramicized silicone rubber glass fiber cloth. At the same time, the coating method improves production efficiency and flexibility, and can meet the needs of large-scale production and use of liquid mixture glass fiber cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1This is a first production flow chart of the liquid ceramic silica glass fiber cloth of the present invention.

[0060] Figure 2 This is a second production flow chart of the liquid ceramic silica glass fiber cloth of the present invention. DETAILED DESCRIPTION

[0061] Since the relevant types of chemical materials and mixing equipment and coating equipment are already existing technologies, the embodiment section only describes some of the more relevant parameters. As for the properties of the relevant materials and other necessary operating specifications or the use and adjustment of relevant parameters, reference can be made to the general knowledge in the field and they will not be repeated in the embodiments.

[0062] Example 1

[0063] A method for preparing liquid ceramic silica glass fiber cloth comprises the following steps (eg Figure 1 ): S1: Preparation of mixture

[0064] The mixture includes liquid silica gel, ceramic powder A and ceramic powder B. The ceramic powder A and ceramic powder B have been modified. The ceramic powder A is calcium carbonate, the ceramic powder B is mica, and the liquid silica gel is gas-phase silica gel. The mass of the ceramic powder A is 30% of the mass of the mixture, the mass of the ceramic powder B is 15% of the mass of the mixture, and the mass of the liquid silica gel is 55% of the mass of the mixture. The sieve particle size of the modified ceramic powders A and B is 300 mesh, and the oil absorption value is 40mL / 100mg.

[0065] The mixture was mixed by manual stirring, and the temperature of the mixture was controlled at 20°C during the mixing process.

[0066] S2: diluting the mixture

[0067] The dilution method is to add D40 solvent oil as a diluent. The proportion of the added diluent is 10% of the mass of the mixture. After mixing evenly, it can reduce the viscosity of the slurry and increase the fluidity, which is convenient for subsequent coating.

[0068] S3: Add curing agent and mix

[0069] The curing agent in this step is a platinum catalyst, which is a commonly used heating curing agent, and the added mass is 4% of the mass of the mixture.

[0070] The mixing conditions are all stirring using a planetary stirrer, and the stirring speed is set to 20RPM. During the operation, the stirring time can be adjusted as needed until the various components in the slurry are evenly mixed.

[0071] S4: coated on glass fiber cloth

[0072] The mixed slurry is evenly applied on the glass fiber cloth by manual coating.

[0073] S5: Curing the glass fiber cloth coated in S4

[0074] A segmented heating curing method is used, the first temperature section is 100°C, in which the diluent is fully volatilized, and the second temperature section is 200°C, at which the mixed slurry undergoes a vulcanization reaction and is cured on the glass fiber cloth.

[0075] The product obtained by Example 1 quickly forms a ceramic layer under high-temperature burning, and is tightly attached to the glass fiber cloth without melting and dripping. It has good flame retardancy, can withstand high temperatures up to 1200°C for a long time without breaking, and will not be ignited at high temperatures, meeting the application requirements of extreme high-temperature environments.

[0076] Example 2

[0077] Compared with Example 1, the temperature of the mixture is controlled at 35° C. during the mixing process, which can also allow the slurry to be mixed normally without affecting the performance of the liquid silicone glass fiber cloth.

[0078] Example 3

[0079] Compared with Example 1, the modified ceramic powders A and B in S1 have a sieve particle size of 400 mesh and an oil absorption value of 60 mL / 100 mg, and liquid silicone glass fiber cloth can also be produced normally.

[0080] Example 4

[0081] Compared with Example 1, the proportion of diluent D40 solvent oil added in S2 is 50%. The fluidity of the mixed slurry is higher than that of the slurry in Example 1 and can still be coated normally. During the curing step of S5, the residence time in the first temperature section needs to be extended to allow the diluent to fully volatilize.

[0082] Example 5

[0083] Compared with Example 1, the diluent S2 is replaced by toluene, which can also achieve dilution of the mixed solution without significant effect on the performance of the ceramic silicone rubber glass fiber cloth.

[0084] Example 6

[0085] Compared with Example 1, step S2 also includes defoaming treatment to prevent bubbling during the subsequent production of liquid ceramic silica glass fiber cloth. In this embodiment, an oily defoamer is added after dilution for defoaming, and the added mass is 0.4% of the mass of the mixture.

[0086] Example 7

[0087] Compared with Example 1, a gray color paste is added to the mixture diluted in step S2 in Example 1 and mixed, and the prepared liquid ceramic silica glass fiber cloth is gray.

[0088] Example 8

[0089] Compared with Example 1, platinum silica gel is added as an anchoring agent to the mixture in step S2 and mixed. The mass of the anchoring agent is 3% of the mass of the mixture. The adhesion between the rubber and the glass fiber cloth can be improved to ensure that no peeling or movement occurs during the application process and no side effects are produced on the mixture.

[0090] Example 9

[0091] Compared with Example 1, the first temperature section in step S5 is set to 100° C., and the second temperature section is set to 200° C., and a better curing effect can be achieved by adjusting the residence time of the glass fiber cloth in the two temperature sections according to the adjusted temperatures.

[0092] Example 10

[0093] Compared with Example 1, a method for preparing liquid ceramic silica glass fiber cloth comprises the following steps (eg Figure 2 ):

[0094] S1: modifying ceramic powder A and ceramic powder B, wherein ceramic powder A is aluminum oxide, calcium carbonate, calcium silicate, magnesium silicate, and aluminum silicate, and ceramic powder B is glass powder, silicon dioxide, and mica;

[0095] The modification treatment method is to use a silane coupling agent to stir the ceramic powder A and the ceramic powder B at a high speed to mix them evenly, thereby improving the electrical properties and ceramic properties of the ceramic powder. The modified ceramic powder A and the ceramic powder B have a sieve particle size of 1000 mesh and an oil absorption value of 50 mL / 100 mg.

[0096] S2: Preparation of the mixture

[0097] The mixture includes liquid silica gel, the modified ceramic powder A and the modified ceramic powder B, the liquid silica gel includes gas phase silica gel or precipitated silica gel,

[0098] The mass of the ceramic powder A is 35% of the mass of the mixture.

[0099] The mass of the ceramic powder B is 15% of the mass of the mixture.

[0100] The mass of the liquid silica gel is 50% of the mass of the mixture;

[0101] The mixing method of the mixture is stirring, the temperature of the rubber material is 25°C, the stirring speed is 28RPM, and the dispersion speed is 38RPM;

[0102] S3: mixing the mixture, D40 solvent oil and oily defoaming agent, wherein the mass of D40 solvent oil is 20% of the mass of the mixture, and the mass of the oily defoaming agent is 0.4% of the mass of the mixture.

[0103] S4: Add blue color paste and mix as needed;

[0104] S5: adding a silicone anchoring agent to the mixture, wherein the mass of the anchoring agent is 2% of the mass of the mixture;

[0105] S6: adding a curing agent and mixing, wherein the mass of the curing agent is 1% of the mass of the mixture;

[0106] S7: filtering the slurry in S6 with a filter screen, wherein the number of holes of the filter screen is 300 meshes;

[0107] S8: Apply the filtered slurry in S7 on the glass fiber cloth by using a comma scraper coater to evenly apply the slurry on the glass fiber cloth; the coating method in this embodiment has better uniformity in applying the slurry than manual coating, and can make the mixed slurry more firmly and deeply bonded to the glass fiber.

[0108] S9: The glass fiber cloth coated in S8 is heated and cured in sections, with the temperature of the first heating section being 85° C. and the temperature of the second heating section being 120° C.

[0109] The relevant materials in this embodiment can also be replaced, which will not be repeated here. The liquid ceramic silicone glass fiber cloth produced by this embodiment has a high fire safety factor and excellent electrical insulation performance. The flame retardant performance and electrical performance tested meet the relevant standards. The specific parameters are as follows:

[0110]

[0111]

[0112] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A method for preparing liquid ceramic silica glass fiber cloth, comprising the following steps: S1: Preparation of the mixture The mixture includes liquid silica gel, ceramic powder A and ceramic powder B, wherein the ceramic powder A and the ceramic powder B have been modified, the ceramic powder A includes at least one of alumina, calcium carbonate and silicates, the ceramic powder B includes at least one of glass powder, silicon dioxide and mica, and the liquid silica gel includes gas phase silica gel or precipitated silica gel. The mass of the ceramic powder A is 30-40% of the mass of the mixture. The mass of the ceramic powder B is 10-20% of the mass of the mixture. The mass of the liquid silica gel is 45-55% of the mass of the mixture; S2: diluting the mixture; S3: Add curing agent and mix; S4: coated on glass fiber cloth; S5: curing the glass fiber cloth coated in S4.

2. The method according to claim 1, characterized in that The temperature of the mixture in S1 is 20-35°C.

3. The method according to claim 2, characterized in that The temperature of the mixture in S1 is 22-25°C.

4. The method according to claim 1, characterized in that: The mixing condition in S1-S3 is stirring, and the stirring speed is 20-30RPM.

5. The method according to claim 4, characterized in that The stirring also includes a dispersion speed of 30-40RPM.

6. The method according to claim 1, characterized in that The sieve particle size of the ceramic powder A and the ceramic powder B is not less than 300 meshes, and the oil absorption value is 40-60 mL / 100 mg.

7. The method according to claim 1, characterized in that The method of diluting the mixture in S2 is to add a diluent into the mixture.

8. The method according to claim 7, characterized in that The mass of the diluent is 10-50% of the mass of the mixture.

9. The method according to claim 7 or 8, characterized in that: The diluent is at least one of epoxy resin, aromatic hydrocarbons, ketones and alcohols.

10. The method according to claim 9, characterized in that The diluent is D40 solvent oil.

11. The method according to claim 1, characterized in that: The step S2 further includes: mixing the mixture with color paste.

12. The method according to claim 11, characterized in that The S2 further includes: the color paste is added before the mixture is diluted.

13. The method according to claim 1, characterized in that The step S2 further includes: defoaming the mixture.

14. The method according to claim 13, characterized in that The defoaming method is to mix the mixture with an oily defoaming agent, wherein the mass of the oily defoaming agent is 0.2-3% of the mass of the mixture.

15. The method according to claim 1, characterized in that The S3 further includes: mixing the mixture with an anchoring agent.

16. The method according to claim 15, characterized in that The mass of the anchoring agent is 1-3% of the mass of the mixture.

17. The method according to claim 1, characterized in that The mass of the curing agent is 0.5-4% of the mass of the mixture.

18. The method according to claim 1, characterized in that Prior to S4, the mixture is filtered.

19. The method according to claim 18, characterized in that The mixed slurry is filtered through a filter screen, and the number of holes in the filter screen is 100-300 meshes.

20. The method according to claim 1, characterized in that The coating method is blade coating.

21. The method according to claim 1, characterized in that The curing method in S5 is heating.

22. The method according to claim 21, characterized in that The heating condition is segmented heating: the temperature of the first heating segment is 50-100°C, and the temperature of the second heating segment is 100-200°C.

23. A method for preparing liquid ceramic silica glass fiber cloth, comprising the following steps: S1: Modify ceramic powder A and ceramic powder B The ceramic powder A comprises at least one of aluminum oxide, calcium carbonate and silicate, and the ceramic powder B comprises at least one of glass powder, silicon dioxide and mica; The sieve particle size of the modified ceramic powder A and the ceramic powder B is not less than 500 mesh, and the oil absorption value is 40-60 mL / 100 mg; S2: Preparation of the mixture The mixture includes liquid silica gel, the modified ceramic powder A and the modified ceramic powder B, the liquid silica gel includes gas phase silica gel or precipitated silica gel, The mass of the ceramic powder A is 30-40% of the mass of the mixture. The mass of the ceramic powder B is 10-20% of the mass of the mixture. The mass of the liquid silica gel is 45-55% of the mass of the mixture; The mixing method of the mixture is stirring, the temperature of the rubber material is 22°C-25°C, the stirring speed is 22-28RPM, and the dispersion speed is 32-38RPM; S3: mixing the mixture, D40 solvent oil and oily defoamer, wherein the mass of D40 solvent oil is 15-25% of the mass of the mixture, and the mass of the oily defoamer is 0.2-0.7% of the mass of the mixture; S4: Add color paste and mix; S5: adding an anchoring agent to mix, wherein the mass of the anchoring agent is 1.5-2.5% of the mass of the mixture; S6: adding a curing agent and mixing, wherein the mass of the curing agent is 0.5-1.5% of the mass of the mixture; S7: Filtering with a filter screen, wherein the number of holes of the filter screen is 200-300 meshes; S8: coating on glass fiber cloth, the coating method is doctor blade coating; S9: The glass fiber cloth coated in S8 is heated and cured in sections, wherein the temperature of the first heating section is 70-90°C, and the temperature of the second heating section is 110-170°C.

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