High-temperature-resistant silicon-based resin rock wool composite material and preparation method thereof

Abstract

The application discloses a high-temperature-resistant silicon-based resin rock wool composite material and a preparation method thereof, and belongs to the technical field of rock wool boards.The application is used for solving the technical problem of poor overall mechanical property and poor high-temperature resistance of the rock wool composite material prepared in the prior art.A preparation method of the high-temperature-resistant silicon-based resin rock wool composite material comprises the following steps: mixing basalt minerals, dolomite, feldspar and slag to obtain complexly doped raw materials; melting the complexly doped raw materials to obtain a mixed melt; uniformly mixing the mixed melt with a composite silicon-based resin to obtain a composite; high-speed dispersing the composite, and spinning the composite into fibers by using centrifugal force, and then pressing the fibers into a cotton collecting machine; spraying a high-temperature-resistant adhesive on surfaces of the fibers to obtain the surface-modified fibers; and pressing, pleating and curing the surface-modified fibers to obtain the high-temperature-resistant silicon-based resin rock wool composite material.The high-temperature-resistant silicon-based resin rock wool composite material prepared by the application has the advantages of good mechanical property, high density and strong high-temperature resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rock wool composite materials, in particular to a high-temperature-resistant silicon-based resin rock wool composite material and a preparation method thereof. BACKGROUND

[0002] Under the background of global advocacy of sustainable development and energy saving and emission reduction, the building industry as an important field of energy consumption, its energy saving and green development are concerned. As a landmark building of modern city development, the optimization of external wall insulation technology of high-rise building has a crucial significance for reducing building energy consumption and improving building safety and comfort; in recent years, rock wool fiber and rock wool board have been widely used in the field of external wall insulation of high-rise buildings due to their unique performance advantages. With the continuous improvement of building energy saving standards and the increasing demand for building safety performance, there is a higher requirement for the high-temperature resistance and fire resistance of rock wool board and rock wool fiber.

[0003] Patent application CN117069383A discloses an energy-saving and environment-friendly rock wool board and a preparation method thereof. The rock wool board comprises basalt, dolomite, coke, slag and shale, and a binder comprising silica sol, phenolic resin and polysilane coupling agent; however, the above binder and inorganic materials in the rock wool board have poor compatibility, and cannot improve the overall mechanical properties and high-temperature resistance of the synthetic rock wool board.

[0004] In view of the technical defects in this regard, a solution is proposed. SUMMARY

[0005] The purpose of the present application is to provide a high-temperature-resistant silicon-based resin rock wool composite material and a preparation method thereof, which solves the technical problems of poor overall mechanical properties and poor high-temperature resistance of the rock wool board composite material prepared in the prior art.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] A preparation method of a high-temperature-resistant silicon-based resin rock wool composite material, comprising the following steps:

[0008] S1, basalt mineral, dolomite, feldspar and slag are mixed to obtain a complexed raw material; the complexed raw material is melted to obtain a mixed melt; the mixed melt is mixed with a composite silicon-based resin to obtain a composite; the composite is high-speed dispersed and spun into fibers by centrifugal force, and then pressed into a cotton collector;

[0009] S2, a high-temperature-resistant adhesive is sprayed on the surface of the fibers to obtain surface-modified fibers; the surface-modified fibers are pressed, pleated and cured to obtain a high-temperature-resistant silicon-based resin rock wool composite material.

[0010] Further, the preparation method of the composite silicon-based resin comprises the following steps:

[0011] A1, adding a porogen, divinylbenzene, methyl methacrylate and ethyl cinnamate in the solvent, mixing, then adding an initiator, stirring until the initiator is completely dissolved, to obtain a prepolymer system;

[0012] A2, the silica and the prepolymer system are reacted under the conditions of a vacuum degree of 20-30 Pa and 75-85℃, and after the reaction is completed, an organic-inorganic polymer is obtained; the organic-inorganic polymer is subjected to post-process treatment to prepare a composite silica-based resin.

[0013] Acetophenone as a solvent, divinylbenzene, methyl methacrylate and ethyl cinnamate undergo a free radical polymerization reaction; the prepolymer system is mixed and contacted with the silica particles in a differential pressure back-suction manner, enters the pores of the silica matrix, and then polymerizes inside the pores to prepare a composite silica-based resin with silica as the matrix.

[0014] Further, in step A1, the amount ratio of the solvent, the porogen, divinylbenzene, methyl methacrylate and ethyl cinnamate, and the initiator is 100-120 mL: 15-20 g: 13-26 g: 10-20 g: 3.4-6.8 g: 0.3-0.5 g; in step A2, the amount ratio of the silica and the prepolymer system is 50-100 g: 130-150 g, and the reaction time is 6-8 h.

[0015] Further, in step S2, the preparation method of the high-temperature-resistant adhesive comprises the following steps:

[0016] B1, reacting isophthalic acid and polyoxypropylene glycol at 240-250℃ for 3-4 h, and then removing water generated in the reaction by vacuum extraction to prepare a polyester polyol;

[0017] B2, mixing the solvent and the polyester polyol, then adding diphenylmethane diisocyanate and a catalyst, mixing uniformly, and reacting at 70-80℃ for 2-3 h to synthesize a polyurethane prepolymer;

[0018] B3, adding polyimide and ethylenediamine to the polyurethane prepolymer, stirring and reacting, aging, and removing the solvent by reduced pressure distillation to prepare a high-temperature-resistant adhesive.

[0019] In the synthesized polyester prepolymer, ethylenediamine is added as a chain extender, and an appropriate amount of polyimide is doped to modify the synthesized adhesive, and then a high-temperature-resistant adhesive is prepared.

[0020] Further, in step B1, the ratio of the amount of isophthalic acid and polyoxypropylene glycol is 1.6-3.2 g:20-40 g; in step B2, the ratio of the amount of solvent, polyester polyol, diphenyl methane diisocyanate and catalyst is 150-200 mL:35-55 g:12-24 g:0.03-0.05 g.

[0021] Further, in step B3, the ratio of the amount of polyurethane prepolymer, polyimide and ethylenediamine is 30-50 g:5-10 g:5-15 g; the temperature of stirring reaction is 80-90 DEG C, the time of stirring reaction is 30-60 min, and the time of aging is 10-12 h.

[0022] Further, in step S1, the weight ratio of basalt mineral, dolomite, feldspar and slag is 75-85:5-8:3-5:10-15, the melting temperature of the mixed raw materials is 1550-1650 DEG C, the melting time of the mixed raw materials is 3-5 h; the mass ratio of the mixed melt and the composite silicon-based resin is 30:2-5; the rotating speed of high-speed dispersion is 2000-3000 r / min, and the time of high-speed dispersion is 20-30 min.

[0023] Further, in step S2, the spraying thickness of the high-temperature-resistant adhesive is 0.1-0.2 mm.

[0024] As another aspect of the present application, the high-temperature-resistant silicon-based resin rock wool composite material is prepared by the preparation method of the high-temperature-resistant silicon-based resin rock wool composite material.

[0025] The present application has the following advantages:

[0026] 1. The rock wool board composite material synthesized in the present application uses inorganic minerals as main raw materials, adds appropriate amount of composite silicon-based resin, and prepares fiber material; the fiber material surface is sprayed with high-temperature-resistant adhesive, and then the high-temperature-resistant silicon-based resin rock wool composite material is prepared by pressing process. Di-vinyl benzene, methyl methacrylate and ethyl cinnamate undergo radical polymerization to obtain silicon-based resin; the silicon-based resin containing multiple functional groups and polar bonds is adsorbed in the inside of silicon dioxide by vacuum extraction, and then the composite silicon-based resin is prepared. The composite silicon-based resin has good compatibility with the remaining inorganic materials of the synthetic rock wool board, so that the organic-inorganic doped fiber is prepared. The organic component of the fiber is used to improve the compatibility of the fiber with the adhesive, and then the silicon-based resin rock wool composite material is prepared.

[0027] 2、The application sprays the high-temperature-resistant adhesive on the synthetic fiber, and the high-temperature-resistant adhesive is specifically polyurethane adhesive; the polyurethane adhesive has a strong polar urethane group structure, and hydrogen bonds can be formed between molecular chains and between chain segments, so that the polyurethane adhesive has good adhesive force; and the water-based polyester as the adhesive has good adhesion. In order to further improve the high-temperature resistance of the adhesive and the fiberboard, the polyester polyol of the esterification product of isophthalic acid and polyoxypropylene glycol is used as the polyol component, and then the polyurethane is cured with the polyimide; the polyimide has a rigid polymer chain, high-density Π-Π interaction between aromatic molecules and uniform chain crystallization, so that the polyimide has excellent mechanical strength and high-temperature resistance. The polyester resin and the polyimide are combined to prepare the adhesive, and the adhesive has excellent adhesion and high-temperature resistance. DETAILED DESCRIPTION

[0028] The technical solutions of the application will be clearly and completely described below in combination with the embodiments. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the application.

[0029] The silicon dioxide used in the embodiments 1-3 is purchased from Jinan Delan Chemical Co., Ltd., and the CAS number is 10279-57-9; the relative molecular mass of the polyoxypropylene glycol used in the embodiments 4-6 is 2000, the hydroxyl value is 56 mgKOH / g, and the unsaturation degree is 0.04; the polyimide used in the embodiments 4-6 is purchased from Shanghai Jingyan Technology Co., Ltd., and the article number is 62929-02-6 and the brand is P874997; the basalt mineral used in the embodiments 7-9 is purchased from Lingshou County Shengxiang Product Co., Ltd., and the specification is 3-5 mm; the dolomite and the feldspar used in the embodiments 7-9 are both purchased from Lingshou County Yaoxin Mineral Product Processing Factory; the slag used in the embodiments 7-9 is purchased from Lingshou County Tuoyun Mineral Product Processing Factory, and the article number is KZ-201.

[0030] Embodiment 1

[0031] The embodiment provides a preparation method of a composite silicon-based resin for a high-temperature-resistant silicon-based resin rock wool composite material, and the method comprises the following steps:

[0032] A1, 100 mL of phenylacetone solvent is measured and added into a beaker, 15 g of porogen diethyl phthalate is added into the beaker, stirred uniformly, 13 g of divinylbenzene, 10 g of methyl methacrylate and 3.4 g of ethyl cinnamate are added into the beaker, mixed uniformly, 0.3 g of initiator azobisisobutyronitrile is added into the beaker, and stirring is performed until the initiator is completely dissolved, to obtain a prepolymer system.

[0033] A2, 50g of silica is added to a flash bottle, the flash bottle is vacuumized to a vacuum degree of 20 Pa, and 130g of the prepolymer system is sucked into the flash bottle through the way of reverse suction by pressure difference from the feeding port. Then the flash bottle is heated to 75℃ for 6h of reaction, and after the reaction is completed, an organic-inorganic polymer is obtained. The composite silica-based resin is washed with acetone and deionized water in turn for multiple times until the filtrate is clear, and then vacuum dried to constant weight to obtain the composite silica-based resin.

[0034] Example 2

[0035] The embodiment provides a preparation method of a composite silica-based resin for a high-temperature-resistant silica-based resin rock wool composite material, including the following steps:

[0036] A1, 110mL of phenylacetone solvent is measured and added to a beaker, 18g of porogen diethyl phthalate is then added to the beaker, stirred uniformly, 20g of divinylbenzene, 15g of methyl methacrylate and 5.1g of ethyl cinnamate are then added to the beaker, mixed uniformly, 0.4g of initiator azobisisobutyronitrile is then added to the beaker, stirred until the initiator is completely dissolved, and a prepolymer system is obtained.

[0037] A2, 80g of silica is added to a flash bottle, the flash bottle is vacuumized to a vacuum degree of 25 Pa, and 140g of the prepolymer system is sucked into the flash bottle through the way of reverse suction by pressure difference from the feeding port. Then the flash bottle is heated to 80℃ for 7h of reaction, and after the reaction is completed, an organic-inorganic polymer is obtained. The composite silica-based resin is washed with acetone and deionized water in turn for multiple times until the filtrate is clear, and then vacuum dried to constant weight to obtain the composite silica-based resin.

[0038] Example 3

[0039] The embodiment provides a preparation method of a composite silica-based resin for a high-temperature-resistant silica-based resin rock wool composite material, including the following steps:

[0040] A1, 120mL of phenylacetone solvent is measured and added to a beaker, 20g of porogen diethyl phthalate is then added to the beaker, stirred uniformly, 26g of divinylbenzene, 20g of methyl methacrylate and 6.8g of ethyl cinnamate are then added to the beaker, mixed uniformly, 0.5g of initiator azobisisobutyronitrile is then added to the beaker, stirred until the initiator is completely dissolved, and a prepolymer system is obtained.

[0041] A2, 100 g of silica is added to a flash bottle, the flash bottle is vacuumized to 30 Pa, 150 g of the prepolymer system is sucked into the flash bottle through the way of differential pressure suction from the feeding port. Then the flash bottle is heated to 85℃ for 8 h, after the reaction is completed, the organic-inorganic polymer is obtained. The composite silica-based resin is washed with acetone and deionized water for multiple times until the filtrate is clear, and then vacuum dried to constant weight to obtain the composite silica-based resin.

[0042] Example 4

[0043] The embodiment provides a preparation method of a high-temperature-resistant adhesive for a high-temperature-resistant silica-based resin rock wool composite material, and the method comprises the following steps:

[0044] B1, 1.6 g of isophthalic acid and 20 g of polyoxypropylene glycol are added to a four-necked flask equipped with a heating jacket, the temperature of the heating jacket is set to 240℃, and the reaction is carried out at this temperature for 3 h, which is regarded as the end of the esterification reaction, and then water generated in the reaction is removed by vacuumization to prepare a polyester polyol.

[0045] B2, the three-necked flask is fixed in an oil bath, the three-necked flask is provided with a condenser and a stirring device; 150 mL of butanone, 35 g of the polyester polyol are added to the three-necked flask, the temperature is raised to 70℃, then 12 g of diphenyl methane diisocyanate and 0.03 g of the catalyst dibutyltin dilaurate are added to the three-necked flask in a nitrogen atmosphere, and the mixture is uniformly stirred, and the reaction is carried out at this temperature for 2 h to synthesize a polyurethane prepolymer.

[0046] B3, 5 g of polyimide and 5 g of ethylenediamine are added to 30 g of the polyurethane prepolymer, stirring is carried out at 80℃ and a speed of 300 r / min for 30 min, then the mixture is aged at room temperature for 10 h, and then butanone solvent is removed by reduced pressure distillation to prepare the high-temperature-resistant adhesive.

[0047] Example 5

[0048] The embodiment provides a preparation method of a high-temperature-resistant adhesive for a high-temperature-resistant silica-based resin rock wool composite material, and the method comprises the following steps:

[0049] B1, 1.6 g of isophthalic acid and 20 g of polyoxypropylene glycol are added to a four-necked flask equipped with a heating jacket, the temperature of the heating jacket is set to 240℃, and the reaction is carried out at this temperature for 3 h, which is regarded as the end of the esterification reaction, and then water generated in the reaction is removed by vacuumization to prepare a polyester polyol.

[0050] B2, the three-necked flask is fixed in the oil bath pot, the three-necked flask is configured with a condenser tube and a stirring device; 180 mL of butanone solvent and 45 g of polyester polyol are added into the three-necked flask, the temperature is raised to 75°C, then 18 g of diphenyl methane diisocyanate and 0.04 g of catalyst dibutyl tin dilaurate are added into the three-necked flask under the nitrogen atmosphere, the mixture is uniformly stirred, and the reaction is carried out at the temperature for 2.2 h, so as to synthesize a polyurethane prepolymer.

[0051] B3, 8 g of polyimide and 10 g of ethylenediamine are added into 40 g of the polyurethane prepolymer, the stirring is carried out at a speed of 400 r / min at 85°C for 50 min, then the aging is carried out at 25°C for 11 h, and finally the butanone solvent is removed through the reduced pressure distillation, so as to prepare a high-temperature-resistant adhesive.

[0052] Example 6

[0053] The embodiment provides a preparation method of a high-temperature-resistant adhesive for a high-temperature-resistant silicon-based resin rock wool composite material, and the method comprises the following steps:

[0054] B1, 3.2 g of isophthalic acid and 40 g of polyoxypropylene glycol are loaded into a four-necked flask provided with a heating jacket, the temperature of the heating jacket is set to 250°C, the reaction is carried out at the temperature for 4 h, the reaction is considered to be completed, water generated in the reaction is removed through vacuumization, and a polyester polyol is prepared.

[0055] B2, the three-necked flask is fixed in the oil bath pot, the three-necked flask is configured with a condenser tube and a stirring device; 180 mL of butanone solvent and 45 g of polyester polyol are added into the three-necked flask, the temperature is raised to 75°C, then 18 g of diphenyl methane diisocyanate and 0.04 g of catalyst dibutyl tin dilaurate are added into the three-necked flask under the nitrogen atmosphere, the mixture is uniformly stirred, and the reaction is carried out at the temperature for 2.2 h, so as to synthesize a polyurethane prepolymer.

[0056] B3, 8 g of polyimide and 10 g of ethylenediamine are added into 40 g of the polyurethane prepolymer, the stirring is carried out at a speed of 400 r / min at 85°C for 50 min, then the aging is carried out at 25°C for 11 h, and finally the butanone solvent is removed through the reduced pressure distillation, so as to prepare a high-temperature-resistant adhesive.

[0057] Example 7

[0058] The embodiment provides a preparation method of a high-temperature-resistant silicon-based resin rock wool composite material, and the method comprises the following steps:

[0059] S1, 75 parts of basalt mineral, 5 parts of dolomite, 3 parts of feldspar and 10 parts of slag are added into an electric smelting furnace according to weight parts, to obtain a complexly doped raw material; the temperature of the electric smelting furnace is set to 1550 DEG C, the complexly doped raw material is melted, the melting time is 3h, to obtain a mixed melt; the mixed melt is cooled to 100 DEG C, and then mixed uniformly with the composite silicon-based resin prepared in Example 1, the mass ratio of the mixed melt to the composite silicon-based resin is 30:2, to obtain a composite; the composite is added into a centrifugal machine for high-speed dispersion, and the composite is spun into fibers by using centrifugal force, the rotating speed of the centrifugal machine is 4000r / min, and the high-speed dispersion time is 20min; then the fibers are pressed into a cotton collector by using a wind press.

[0060] S2, the fiber surface is sprayed with the high-temperature-resistant adhesive prepared in Example 4, to obtain a surface-modified fiber, the spraying thickness is 0.1mm, then the surface-modified fiber is processed by pressing and pleating curing by using a pendulum method, and finally a high-temperature-resistant silicon-based resin rock wool composite material is obtained.

[0061] Example 8

[0062] The embodiment provides a preparation method of a high-temperature-resistant silicon-based resin rock wool composite material, which comprises the following steps:

[0063] S1, 80 parts of basalt mineral, 5 parts of dolomite, 3 parts of feldspar and 10 parts of slag are added into an electric smelting furnace according to weight parts, to obtain a complexly doped raw material; the temperature of the electric smelting furnace is set to 1600 DEG C, the complexly doped raw material is melted, the melting time is 4h, to obtain a mixed melt; the mixed melt is cooled to 110 DEG C, and then mixed uniformly with the composite silicon-based resin prepared in Example 2, the mass ratio of the mixed melt to the composite silicon-based resin is 30:3, to obtain a composite; the composite is added into a centrifugal machine for high-speed dispersion, and the composite is spun into fibers by using centrifugal force, the rotating speed of the centrifugal machine is 4500r / min, and the high-speed dispersion time is 25min; then the fibers are pressed into a cotton collector by using a wind press.

[0064] S2, the fiber surface is sprayed with the high-temperature-resistant adhesive prepared in Example 5, to obtain a surface-modified fiber, the spraying thickness is 0.15mm, then the surface-modified fiber is processed by pressing and pleating curing by using a pendulum method, and finally a high-temperature-resistant silicon-based resin rock wool composite material is obtained.

[0065] Example 9

[0066] The embodiment provides a preparation method of a high-temperature-resistant silicon-based resin rock wool composite material, which comprises the following steps:

[0067] S1, 85 parts of basalt mineral, 8 parts of dolomite, 5 parts of feldspar and 15 parts of slag are added into an electric smelting furnace according to weight parts to obtain a complexly doped raw material; the temperature of the electric smelting furnace is set to 1650 DEG C, the complexly doped raw material is melted, the melting time is 5 h, a mixed melt is obtained; the mixed melt is cooled to 120 DEG C, and then mixed uniformly with the composite silicon-based resin prepared in Example 3, the mass ratio of the mixed melt to the composite silicon-based resin is 30:5, to obtain a composite; the composite is added into a centrifuge for high-speed dispersion, and the composite is spun into fibers by using centrifugal force, the rotating speed of the centrifuge is 5000 r / min, and the high-speed dispersion time is 30 min; then the fibers are pressed into a cotton collector by using a pneumatic press.

[0068] S2, the fiber surface is sprayed with the high-temperature resistant adhesive prepared in Example 6 to obtain a surface-modified fiber, the spraying thickness is 0.2 mm, and then the surface-modified fiber is processed by pressing and pleating curing by using a pendulum method, to finally obtain a high-temperature resistant silicon-based resin rock wool composite material.

[0069] Comparative Example 1

[0070] The difference between the present comparative example and Example 9 is that, in the preparation of the composite silicon-based resin, in step A1, methyl methacrylate is not added in the synthesis of the prepolymer system.

[0071] Comparative Example 2

[0072] The difference between the present comparative example and Example 9 is that, in the preparation of the high-temperature resistant adhesive, step B1 is cancelled, and the same mass of dihydric alcohol is used to replace the synthesized polyester polyol.

[0073] Comparative Example 3

[0074] The difference between the present comparative example and Example 9 is that, in the preparation of the high-temperature resistant silicon-based resin rock wool composite material, the composite silicon-based resin is not added.

[0075] Performance test:

[0076] 1. The bending strength and compressive strength of the high-temperature resistant silicon-based resin rock wool composite materials prepared in Examples 7-9 and Comparative Examples 1-3 are detected by using a universal testing machine.

[0077] 2. The thermal conductivity of the high-temperature resistant silicon-based resin rock wool composite materials prepared in Examples 7-9 and Comparative Examples 1-3 is detected by using a thermal conductivity instrument.

[0078] 3. The high-temperature resistant silicon-based resin rock wool composite materials prepared in Examples 7-9 and Comparative Examples 1-3 are sequentially subjected to thermogravimetric analysis, and the weight loss rate at 500 DEG C is recorded.

[0079] Table 1. Performance test data of samples

[0080]

[0081] Data analysis: the high-temperature-resistant silicon-based resin rock wool board composite materials prepared in examples 7-9 of the present application all have excellent mechanical properties, which are manifested in that the prepared rock wool board composite materials all have high bending strength and compressive strength values; however, in comparative example 3, no composite silicon-based resin is added when preparing the high-temperature-resistant silicon-based resin rock wool composite material; the silicon dioxide component in the composite silicon-based resin can enhance the mechanical properties of the prepared rock wool board composite material; in addition, the composite silicon-based resin as an organic component makes the compatibility of the synthetic fiber and the high-temperature-resistant adhesive better, thereby being able to improve the integrity of the prepared rock wool board composite material, which is manifested in that it has excellent mechanical properties; therefore, the mechanical properties of the rock wool board composite material prepared in comparative example 3 of the present application decrease.

[0082] The high-temperature-resistant silicon-based resin rock wool board composite materials prepared in examples 7-9 of the present application have large bulk density, thereby making the prepared rock wool board composite material have a high thermal conductivity; however, in comparative example 1, no methyl methacrylate is added in the prepolymer system when preparing the composite silicon-based resin; the addition of methyl methacrylate can enhance the polarity of the prepared composite silicon-based resin, and the sprayed high-temperature-resistant adhesive can better penetrate into the fiber interior, thereby improving the density of the prepared composite material, which is manifested in that the thermal conductivity is improved.

[0083] The high-temperature-resistant silicon-based resin rock wool board composite materials prepared in examples 7-9 of the present application have excellent high-temperature resistance, which is manifested in that the weight loss rates of the high-temperature-resistant silicon-based resin rock wool board composite materials prepared in examples 7-9 are all small at 500℃. However, in comparative example 2, the high-temperature-resistant adhesive is prepared by replacing the polycyclic structure and the synthetic polyester polyol with a large molecular weight with ethylene glycol, which makes the prepared adhesive have decreased high-temperature resistance, which is manifested in that the high-temperature-resistant silicon-based resin rock wool board composite materials prepared in examples 7-9 all have high weight loss rates at 500℃.

[0084] The above content is merely an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the present application or exceed the scope defined by the present claims, which shall belong to the protection scope of the present application.

[0085] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0086] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to provide the best illustration of the application principles and their practical application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A method for preparing a high temperature resistant silicon-based resin rock wool composite material, characterized in that, The method comprises the following steps: S1, basalt minerals, dolomite, feldspar and slag are mixed to obtain a mixed raw material; the mixed raw material is melted to obtain a mixed melt; the mixed melt is mixed with a composite silicon-based resin to obtain a composite; The composite is high-speed dispersed and spun into fibers by centrifugal force, and then pressed into a collector; wherein, the preparation method of the composite silicon-based resin comprises the following steps: A1, a pore former, divinylbenzene, methyl methacrylate and ethyl cinnamate are added to a solvent and mixed, then an initiator is added, stirred until the initiator is completely dissolved, and a prepolymer system is obtained; A2, the silica and the prepolymer system are reacted under the condition of a vacuum degree of 20-30 Pa and a temperature of 75-85℃, and after the reaction is completed, an organic-inorganic polymer is obtained; the organic-inorganic polymer is processed to obtain the composite silicon-based resin; in step A1, the amount ratio of the solvent, the pore former, divinylbenzene, methyl methacrylate, ethyl cinnamate and the initiator is 100-120 mL:15-20 g:13-26 g:10-20 g:3.4-6.8 g:0.3-0.5 g; in step A2, the amount ratio of the silica and the prepolymer system is 50-100 g:130-150 g, and the reaction time is 6-8 h; S2, a high-temperature resistant adhesive is sprayed on the surface of the fibers to obtain surface-modified fibers; the surface-modified fibers are pressed, pleated and cured to obtain a high-temperature resistant silicon-based resin rock wool composite material; wherein, the preparation method of the high-temperature resistant adhesive comprises the following steps: B1, isophthalic acid and polyoxypropylene glycol are reacted at 240-250℃ for 3-4 h, and then vacuumized to remove water generated in the reaction to obtain a polyester polyol; B2, the solvent and the polyester polyol are mixed, then diphenylmethane diisocyanate and a catalyst are added and mixed, and then reacted at 70-80℃ for 2-3 h to synthesize a polyurethane prepolymer; B3, the polyurethane prepolymer is added with polyimide and ethylenediamine, and then stirred, aged and distilled under reduced pressure to remove the solvent to obtain the high-temperature resistant adhesive; in step B1, the amount ratio of isophthalic acid and polyoxypropylene glycol is 1.6-3.2 g:20-40 g; in step B2, the amount ratio of the solvent, the polyester polyol, diphenylmethane diisocyanate and the catalyst is 150-200 mL:35-55 g:12-24 g:0.03-0.05 g; in step B3, the amount ratio of the polyurethane prepolymer, the polyimide and the ethylenediamine is 30-50 g:5-10 g:5-15 g; the stirring reaction temperature is 80-90℃, the stirring reaction time is 30-60 min, and the aging time is 10-12 h.

2. The method for preparing a high-temperature-resistant silicon-based resin rock wool composite material according to claim 1, characterized in that, In step S1, the weight ratio of basalt minerals, dolomite, feldspar and slag is 75-85:5-8:3-5:10-15, the melting temperature of the mixed raw material is 1550-1650℃, and the melting time of the mixed raw material is 3-5 h; the mass ratio of the mixed melt and the composite silicon-based resin is 30:2-5; the rotation speed of high-speed dispersion is 4000, 4500 and 5000 r / min, and the high-speed dispersion time is 20-30 min.

3. The method for preparing a high-temperature resistant silicone-based resin rock wool composite material according to claim 1, characterized in that, In step S2, the spraying thickness of the high-temperature-resistant adhesive is 0.1-0.2mm.

4. A high temperature resistant silicon based resin rock wool composite material, characterized in that, The high-temperature-resistant silicon-based resin rock wool composite material is prepared by the method of any one of claims 1-3.

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