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CN111907086A - Preparation method of SMC composite material containing fireproof heat-insulation ceramic silicone rubber - Google Patents

Preparation method of SMC composite material containing fireproof heat-insulation ceramic silicone rubber Download PDF

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Publication number
CN111907086A
CN111907086A CN202010521439.4A CN202010521439A CN111907086A CN 111907086 A CN111907086 A CN 111907086A CN 202010521439 A CN202010521439 A CN 202010521439A CN 111907086 A CN111907086 A CN 111907086A
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parts
smc
resin paste
weight
silicone rubber
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丁凯
徐赢斐
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Zhejiang Baorun applied material Co.,Ltd.
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Ningbo Baoer New Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/18—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length in the form of a mat, e.g. sheet moulding compound [SMC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
    • C08J2363/10—Epoxy resins modified by unsaturated compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/222—Magnesia, i.e. magnesium oxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/004—Additives being defined by their length
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Mechanical Engineering (AREA)
  • Composite Materials (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a preparation method of an SMC composite material containing fireproof heat-insulating ceramic silicon rubber, belonging to the technical field of composite materials. The preparation method comprises the following steps: weighing raw materials according to the parts by weight, mixing the raw materials to prepare resin paste, uniformly coating the resin paste on a high-density polyethylene film, taking alkali-free glass fibers to fall between two layers of films of an upper layer and a lower layer of the high-density polyethylene film coated with the resin paste, conveying the films to a press roller through a conveyor belt, fully soaking the resin paste and the alkali-free glass fibers, coating the films by using an epoxy silane coupling agent, and then closing and pressing the films with a ceramic silicon rubber sheet for 5 minutes for curing and forming. The material of the invention can resist flame impact and reduce the vacant volume of the battery pack box body, thereby saving the material and thinning the appearance of the battery pack, and if the thinned space is utilized to be filled into more cells, the energy density can be improved.

Description

Preparation method of SMC composite material containing fireproof heat-insulation ceramic silicone rubber
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a preparation method of an SMC composite material containing fireproof heat-insulating ceramic silicon rubber.
Background
The SMC material was first developed successfully by Bayer company in Germany in 1960 and realized industrial production, and then developed successively in Western Europe, the United states and Japan, and China began to develop in 1975 and then developed industrially, and has now formed a larger-scale industry. Due to the advantages of light weight, high strength and the like, the SMC material gradually becomes the choice of the shell material of the new energy automobile battery pack, and the structural design of the battery pack is easier to realize due to the formability characteristics of the SMC material. However, the SMC material serving as the upper cover shell of the battery pack has an application risk that the SMC material has poor fireproof and heat-resistant performance, and if the battery pack sends out thermal runaway, flames in the battery core can penetrate through the SMC shell to threaten passengers in a vehicle.
The existing scheme is that an inorganic fireproof plate is adopted to perform fireproof treatment on an SMC upper cover, and an insulating function layer (or an air layer is reserved between a fireproof material and an SMC cover plate) is added to achieve the fireproof and insulating effect so as to protect the SMC from being damaged by heat. However, the inorganic fireproof plate cannot insulate heat, so that the SMC plate is melted by heat. The existing burning condition is that the flame impact temperature is 1500 ℃, the flame impact lasts for 30 minutes, and the whole SMC upper cover shell is not punctured to generate open fire. In order to solve the defect that the inorganic material cannot insulate heat, a heat insulation layer is required to be added between the inorganic plate and the SMC upper cover. This leads to an increase in material costs and also to an increase in the non-cell volume of the battery pack. The increase in the volume of the non-cells in the battery pack results in a decrease in energy density.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of an SMC composite material containing fireproof heat-insulating ceramic silicon rubber.
The purpose of the invention is realized by the following technical scheme:
a preparation method of an SMC composite material containing fireproof heat-insulating ceramic silicon rubber comprises the following steps:
step one, mixing 16-20 parts of vinyl resin, 2.7-3.0 parts of polyvinyl chloride, 1.3-1.5 parts of styrene, 0.07-0.1 part of hydroquinone, 1.2-1.5 parts of zinc stearate, 35-40 parts of aluminum hydroxide and 0.7-0.75 part of active magnesium oxide according to parts by weight to prepare resin paste, uniformly coating the resin paste on a high-density polyethylene film, taking 25-28 parts of alkali-free glass fiber, chopping the alkali-free glass fiber to the length of 2.5-3.0cm, falling between two layers of films of an upper layer and a lower layer of the high-density polyethylene film coated with the resin paste, conveying the resin paste to a press roller through a conveyor, and fully impregnating the resin paste and the alkali-free glass fiber to obtain an SMC prepolymer semi-cured sheet;
step two, coating one surface of the semi-cured sheet of the SMC prepolymer obtained in the step one by adopting an epoxy silane coupling agent, and drying for 2min at 50 ℃;
spreading the ceramic silicon rubber sheet on a hot-pressing die, and spreading the surface-treated surface of the SMC prepolymer semi-finished sheet on the surface of the ceramic silicon rubber sheet;
and step four, closing the die and pressing for 5 minutes to perform curing molding, wherein the temperature of the die is 150 ℃, and the SMC composite material containing the fireproof heat-insulation ceramic silicon rubber is obtained.
Further, the epoxy silane coupling agent in the second step is gamma-glycidoxypropyltrimethoxysilane.
Further, the concentration of the epoxy silane coupling agent in the second step is 0.5-2 mol/L.
Further, the preparation method of the ceramic silicon rubber sheet in the third step comprises the following steps: putting 11-15 parts by weight of methyl vinyl silicone rubber, 8-10 parts by weight of wollastonite, 5-8 parts by weight of glass powder, 1-3 parts by weight of hydroxyl silicone oil and 2-4 parts by weight of benzoyl peroxide into an internal mixer, mixing the raw materials at 50 ℃, preparing ceramic silicone rubber by adopting a compression molding process, slicing the ceramic silicone rubber, putting the slices into a corundum crucible for sintering, wherein the sintering temperature is 1000 ℃, the heating rate is 1 ℃/min, the heat preservation time is 1h, and finally cooling along with a furnace to obtain the ceramic silicone rubber sheet.
The invention has the beneficial effects that:
(1) the composite material of the ceramic silicon rubber and the SMC plate is finished in the process of SMC plate forming. And the composite material can be directly applied to the battery pack as an SMC fireproof upper cover. The ceramic silicon rubber contains high-temperature phase change filler, and the material is kept from being broken down by flame in high-temperature flame impact, and the material absorbs heat in a large quantity at high temperature to play a heat insulation role in protecting the SMC cover plate from being broken down by high-temperature flame impact.
(2) Compared with the existing inorganic fireproof material, the fireproof heat-insulating material does not need extra space between the fireproof heat-insulating material and the SMC cover plate, so that the space of a battery pack can be saved, and more battery cores can be added with the energy density. And because the integrated molding is efficient, the cover plate cost can be reduced. And the materials are integrally compounded, so that the mounting step of the cover plate on the battery pack can be simplified, the efficiency is improved, and the process time for mounting the cover plate is reduced.
Drawings
FIG. 1 is a flow chart of a preparation process of the SMC composite material containing fireproof heat-insulating ceramic silicon rubber;
FIG. 2 is a shape of a fired sample;
FIG. 3 is a simplified diagram of a burn test apparatus.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the following specific examples, but the scope of the present invention is not limited to the following.
Examples
A preparation method of an SMC composite material containing fireproof heat-insulating ceramic silicon rubber comprises the following steps:
firstly, mixing 16-20 parts by weight of vinyl resin, 2.7-3.0 parts by weight of polyvinyl chloride, 1.3-1.5 parts by weight of styrene, 0.07-0.1 part by weight of hydroquinone, 1.2-1.5 parts by weight of zinc stearate, 35-40 parts by weight of aluminum hydroxide and 0.7-0.75 part by weight of active magnesium oxide to prepare resin paste, uniformly coating the resin paste on a high-density polyethylene film, chopping 25-28 parts by weight of alkali-free glass fiber to the length of 2.5-3.0cm, falling between two layers of films of an upper layer and a lower layer of the high-density polyethylene film coated with the resin paste, and conveying the film to a press roller through a conveyor belt to fully impregnate the resin paste and the alkali-free glass fiber to obtain an SMC prepolymer semi-finished sheet;
then, putting 11-15 parts by weight of methyl vinyl silicone rubber, 8-10 parts by weight of wollastonite, 5-8 parts by weight of glass powder, 1-3 parts by weight of hydroxyl silicone oil and 2-4 parts by weight of benzoyl peroxide into an internal mixer, mixing the raw materials at 50 ℃, preparing ceramic silicone rubber by adopting a compression molding process, slicing, putting the slices into a corundum crucible, sintering at the sintering temperature of 1000 ℃, at the heating rate of 1 ℃/min, keeping the temperature for 1h, cooling along with a furnace to obtain a ceramic silicone rubber raw sheet, coating one surface of the semi-finished sheet of the SMC prepolymer obtained in the first step by adopting gamma-glycidyl ether oxypropyl trimethoxysilane with the concentration of 0.5-2mol/L, and drying at 50 ℃ for 2 min;
spreading the ceramic silicon rubber sheet on a hot-pressing die, and spreading the surface-treated surface of the SMC prepolymer semi-finished sheet on the surface of the ceramic silicon rubber sheet;
and finally, closing the die and pressing for 5 minutes for curing and forming, wherein the temperature of the die is 150 ℃, and the SMC composite material containing the fireproof heat-insulation ceramic silicon rubber is obtained.
11-15 parts of methyl vinyl silicone rubber, 8-10 parts of wollastonite, 5-8 parts of glass powder, 1-3 parts of hydroxyl silicone oil and 2-4 parts of benzoyl peroxide
Table 1 below SMC composites were prepared by the above preparation method under different parameters, wherein no ceramic silicone rubber sheet was added in the comparative example.
TABLE 1
Figure BDA0002532247230000041
The SMC composites prepared in examples 1-5 and comparative examples were tested for their burn performance according to the following test methods:
1 sample (1)
As shown in FIG. 2, the shape of the material subjected to the flame test was 150, and the length and width of the test piece were 150 mm. + -. 10 mm.
2 test instrument
A fire test apparatus As shown in FIG. 3 is a simplified diagram of a fire test apparatus
The burning tester meets the precision requirement, the model of the acetylene spray gun is YBL-30, and the model of the spray head is G01-30. The distance between the test stand and the spray gun can be automatically adjusted, and the flame is formed by mixing and burning acetylene and oxygen and can be accurately controlled by a valve. When the flame is burnt, the acetylene pressure value is 0.05MPa, the oxygen pressure value is 0.5MPa, and the flame temperature requirement is met.
Number of samples 3
The number of samples should be no less than three.
4 test procedure
Fixing the sample on a test stand, fixing a temperature sensing probe on the back of the sample, automatically adjusting the distance D between the test stand and the spray gun to be 150mm, adjusting a knob of the high-temperature spray gun to enable the temperature T1 of the hot surface impacted by flame to be 1000 ℃, and continuously burning until the sample is burnt through. And after the test is finished, the flame is closed, the test stand is retracted to a safe distance, the sample is taken down by using tweezers, and the temperature data T2 of the back surface of the material in the period from the beginning to the end of the burning is derived.
5 test results recording
The time S from the start of the fire to the burn-through of the sample was recorded and back temperature data T2 during the fire was derived.
The results of the test are set forth in table 2 below:
TABLE 2
Time of measurement Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example
Back temperature at 25 seconds 29 28 28 26 26 42
Back temperature at 1 minute deg.C 35 34 34 33 32 56
From the data in Table 2, it can be seen that the ceramicized silicone rubber sheet has a large effect on the flame performance of the SMC composite.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as hereinafter claimed, and that changes may be made by those skilled in the art or by those who review this disclosure. And that modifications and variations may be effected by those skilled in the art without departing from the spirit of the invention.

Claims (4)

1. A preparation method of an SMC composite material containing fireproof heat-insulating ceramic silicon rubber is characterized by comprising the following steps:
step one, mixing 16-20 parts of vinyl resin, 2.7-3.0 parts of polyvinyl chloride, 1.3-1.5 parts of styrene, 0.07-0.1 part of hydroquinone, 1.2-1.5 parts of zinc stearate, 35-40 parts of aluminum hydroxide and 0.7-0.75 part of active magnesium oxide according to parts by weight to prepare resin paste, uniformly coating the resin paste on a high-density polyethylene film, taking 25-28 parts of alkali-free glass fiber, chopping the alkali-free glass fiber to the length of 2.5-3.0cm, falling between two layers of films of an upper layer and a lower layer of the high-density polyethylene film coated with the resin paste, conveying the resin paste to a press roller through a conveyor, and fully impregnating the resin paste and the alkali-free glass fiber to obtain an SMC prepolymer semi-cured sheet;
step two, coating one surface of the semi-cured sheet of the SMC prepolymer obtained in the step one by adopting an epoxy silane coupling agent, and drying for 2min at 50 ℃;
spreading the ceramic silicon rubber sheet on a hot-pressing die, and spreading the surface-treated surface of the SMC prepolymer semi-finished sheet on the surface of the ceramic silicon rubber sheet;
and step four, closing the die and pressing for 5 minutes to perform curing molding, wherein the temperature of the die is 150 ℃, and the SMC composite material containing the fireproof heat-insulating ceramic silicon rubber is obtained.
2. The method according to claim 1, wherein the epoxy silane coupling agent in step two is γ -glycidoxypropyltrimethoxysilane.
3. The method according to claim 1, wherein the concentration of the epoxy silane coupling agent in the second step is 0.5 to 2 mol/L.
4. The preparation method according to claim 1, wherein the ceramic silicone rubber sheet stock in step three is prepared by: putting 11-15 parts by weight of methyl vinyl silicone rubber, 8-10 parts by weight of wollastonite, 5-8 parts by weight of glass powder, 1-3 parts by weight of hydroxyl silicone oil and 2-4 parts by weight of benzoyl peroxide into an internal mixer, mixing the raw materials at 50 ℃, preparing ceramic silicone rubber by adopting a compression molding process, slicing the ceramic silicone rubber, putting the slices into a corundum crucible for sintering, wherein the sintering temperature is 1000 ℃, the heating rate is 1 ℃/min, the heat preservation time is 1h, and finally cooling along with a furnace to obtain the ceramic silicone rubber sheet.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114605837A (en) * 2022-03-10 2022-06-10 浙江葆润应用材料有限公司 Integrally-formed fireproof PCM composite material for battery pack and preparation method thereof

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