CN117844255A - Silica gel sheet and preparation method and application thereof - Google Patents

Silica gel sheet and preparation method and application thereof Download PDF

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Publication number
CN117844255A
CN117844255A CN202410007128.4A CN202410007128A CN117844255A CN 117844255 A CN117844255 A CN 117844255A CN 202410007128 A CN202410007128 A CN 202410007128A CN 117844255 A CN117844255 A CN 117844255A
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parts
silica gel
gel sheet
silicone oil
hydrogen
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李彦民
范葛敏
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Shenzhen Square Silicone Co ltd
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Shenzhen Square Silicone Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/14—Solid materials, e.g. powdery or granular
    • 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
    • C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
    • C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention provides a silica gel sheet and a preparation method and application thereof, and relates to the technical field of preparation of silicone rubber. The silica gel sheet provided by the invention comprises the following components in parts by weight: 100 parts of vinyl silicone oil, 0.5 to 5 parts of hydrogen-containing silicone oil, 100 to 500 parts of heat conducting filler, 0.1 to 1 part of heat resistant agent, 100 to 300 parts of flame retardant, 2 to 5 parts of reinforcing filler, 1 to 5 parts of catalyst and 0.001 to 0.005 part of inhibitor; the viscosity of the vinyl silicone oil at 25 ℃ is 20000-100000 mPa.s; the mass fraction of hydrogen element in the hydrogen-containing silicone oil is 0.1-1%; the flame retardant is melamine cyanurate. The silica gel sheet provided by the invention has excellent temperature resistance, high heat conductivity coefficient and flame retardance reaching UL94V-0.

Description

Silica gel sheet and preparation method and application thereof
The application is a divisional application of which the application date is 2018, 09 and 30, the application number is CN201811154455.3, and the invention name is silica gel sheet and preparation method thereof.
Technical Field
The invention belongs to the technical field of preparation of silicon rubber, and particularly relates to a silica gel sheet, and a preparation method and application thereof.
Background
Silicon rubber is widely used as a very important chemical product in the industries of electronics, construction, molds, automobiles, ships and the like. Conventional silicone rubber is composed mainly of segments of silicone containing methyl groups and small amounts of vinyl groups. The introduction of phenyl can improve the high and low temperature resistance of the silicone rubber, and the introduction of trifluoropropyl and cyano can improve the temperature resistance and oil resistance of the silicone rubber. The silicone rubber has good low temperature resistance and can still work at-55 ℃. After introduction of the phenyl group, the temperature can reach-73 ℃. The heat resistance of the silicone rubber is also outstanding, the silicone rubber can work for a long time at 180 ℃, can still bear elasticity for a plurality of weeks or longer even if the silicone rubber is slightly higher than 200 ℃, and can instantaneously resist the high temperature of more than 300 ℃. The silicone rubber has good air permeability, and the oxygen transmission rate is the highest among the synthetic polymers. In addition, silicone rubber has outstanding characteristics of physiological inertia and no coagulation, so that the silicone rubber is widely applied in the medical field.
Since the high-temperature low-temperature performance of silicone rubber is superior to that of general rubber, it is often applied to high-temperature and low-temperature environments. Silicone rubber also has its limitations.
The common silicon rubber can only be used at 200 ℃, and has the heat conductivity coefficient of 0.2w/m.k and the flame retardant grade of UL94HB. In some applications, silicone rubber has excellent electrical insulation properties and chemical stability. Excellent high temperature resistance, heat conduction and flame retardance are also required. For example, the silica gel sheet used in the fields of new energy batteries and PTC heaters has high use environment temperature and long-term use condition of 200-250 ℃. And requires excellent heat conduction performance, and also requires the silica gel sheet to have flame retardant performance under the condition of equipment short circuit or fire.
In general, the existing silica gel sheet cannot have high temperature resistance, excellent thermal conductivity and UL94V0 flame retardant property, and cannot meet the industrial requirements of certain special fields on the silica gel sheet with high temperature resistance, excellent thermal conductivity and UL94V0 flame retardant property.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a silica gel sheet, a preparation method and application thereof, so as to solve the problems of insufficient high temperature resistance, heat conduction and flame retardance of the conventional silica gel sheet.
In order to achieve the purpose of the invention, the invention provides a silica gel sheet which comprises the following components in parts by weight:
100 parts of vinyl silicone oil
0.5 to 5 parts of hydrogen silicone oil
100-500 parts of heat conducting filler
0.1 to 1 part of heat resistant agent
100-300 parts of flame retardant
2-5 parts of reinforcing filler
1 to 5 portions of platinum catalyst
0.001 to 0.005 part of inhibitor; the viscosity of the vinyl silicone oil at 25 ℃ is 20000-100000 mPa.s; the mass fraction of hydrogen element in the hydrogen-containing silicone oil is 0.1-1%; the flame retardant is melamine cyanurate.
Preferably, the thermally conductive filler includes any one or more of aluminum oxide, magnesium oxide, silicon carbide, zinc oxide, and boron nitride.
Preferably, the heat-resistant agent is any one of iron oxide, cerium oxide, and carbon black.
Preferably, the reinforcing filler is white carbon black or MQ silicone resin.
Preferably, the catalyst is a platinum catalyst.
Preferably, the inhibitor is an alkynol inhibitor.
The invention also provides a preparation method of the silica gel sheet, which comprises the following steps:
obtaining each component according to the types of the components contained in the silica gel sheet and the mass parts of the components;
carrying out first mixing treatment on the obtained vinyl silicone oil, the heat conducting filler, the heat resisting agent, the flame retardant and the reinforcing filler for 1-3 hours at the temperature of 110-140 ℃, cooling and grinding to obtain base adhesive; the first mixing treatment mode is kneading or ball milling;
after the base rubber, the hydrogen-containing silicone oil and the inhibitor are subjected to second mixing treatment, adding a catalyst to perform third mixing treatment, and obtaining a rubber material; the second mixing treatment and the third mixing treatment are independently stirring;
and (3) carrying out compression molding on the sizing material to obtain the silica gel sheet.
The invention also provides application of the silica gel sheet prepared by the technical scheme or the preparation method of the technical scheme in a new energy battery or a PTC heater.
Compared with the prior art, the silica gel sheet is added with heat conduction, heat resistance and flame retardance fillers besides conventional additives. Therefore, the flame retardant has the advantages of high temperature resistance, good thermal conductivity, good flame retardance and the like.
According to the preparation method of the silica gel sheet, on one hand, the functions of various fillers are concentrated and reflected on the silica gel sheet through reasonable process conditions and proper proportion; on the other hand, the process is simple, the operation is easy, the performance of the silica gel sheet is stable, the production efficiency is high, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a preparation method of a silica gel sheet according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a silica gel sheet and a preparation method thereof, which are characterized by comprising the following components in parts by mass:
100 parts of vinyl silicone oil
0.5 to 5 parts of hydrogen silicone oil
100-500 parts of heat conducting filler
0.1 to 1 part of heat resistant agent
100-300 parts of flame retardant
2-5 parts of reinforcing filler
1 to 5 parts of catalyst
0.001 to 0.005 part of inhibitor
The viscosity of the vinyl silicone oil at 25 ℃ is 1000-200000 mPa.s. Preferably the viscosity is 20000 to 100000mpa.s. The viscosity of the silicone oil has an influence on the hardness of the silicone oil, and the silicone oil with moderate viscosity is preferable to obtain the silicone oil with moderate hardness.
The mass fraction of the hydrogen element in the hydrogen-containing silicone oil is 0.1-1%. The mass fraction of the hydrogen element is preferably 0.3 to 0.8%. Studies have shown that as the hydrogen content increases, the tensile strength and hardness of silica gel gradually increase, while the elongation at break and tear strength gradually decrease. Therefore, in order to achieve the balance of tensile strength, hardness, elongation at break and tear strength, the present invention controls the hydrogen content in a moderate range.
The heat conducting filler is any one or a mixture of at least two of aluminum oxide, magnesium oxide, silicon carbide, zinc oxide and boron nitride. The selected heat conductive agent is a conventional nonflammable heat conductive agent, which is used for enhancing the heat conductive property without adversely affecting the flame retardant property.
The heat resistant agent is one or more of ferric oxide, cerium oxide and carbon black. The addition of a proper amount of heat resistant agent can increase the thermal deformation temperature of the silica gel sheet so as not to soften during working.
The flame retardant is melamine cyanurate. Preferably having a particle size of 2 to 10 microns. Melamine cyanurate belongs to a nitrogen series flame retardant and has two forms of powder and granule. When the polyamide foam flame-retardant by the product burns, the formed carbon foam layer plays a role in protecting the polymer and insulating heat from oxygen. With the addition of the product, the smoke density and toxic gas of the polymer can be greatly reduced, and meanwhile, no irritant hydrogen halide gas is generated. Since the amount of the flame retardant is relatively large, the smaller particle size, that is, 2 to 10 μm is preferable to reduce the influence of the flame retardant on the properties such as plasticity.
The reinforcing filler is white carbon black or MQ silicone resin. Preferably, the specific surface area is 200-400 vapor phase white carbon black. Preferably the MQ silicone is a vinyl MQ silicone with a vinyl content of 2 to 3.5%. If appropriate, the reinforcing agent can alter the tensile and tear properties.
The catalyst is a platinum catalyst. The platinum catalyst is a common catalyst for silicon rubber, and has good catalytic effect.
The inhibitor is alkynol inhibitor. The addition of a proper amount of inhibitor can be combined with the platinum catalyst to reduce the overall catalytic activity, thereby achieving the purpose of controlling the reaction rate.
Another object of the present invention is to provide a method for preparing a silica gel sheet, wherein the preparation method is shown in the process flow chart of fig. 1, and the steps of the method are as follows:
s01, obtaining each component according to the types of the components contained in the silica gel sheet and the mass parts of the components;
mixing the obtained vinyl silicone oil, heat conducting filler, heat resisting agent, flame retardant and reinforcing filler at 110-140 ℃ for 1-3 h to prepare base adhesive; grinding after cooling;
s02, adding the base adhesive, the hydrogen-containing silicone oil and the inhibitor into the mixture for mixing treatment for 10-30 min, and then adding the catalyst into the mixture for mixing treatment for 5-10 min;
and S03, performing compression molding on the obtained sizing material to obtain the silica gel sheet.
The mixing treatment in step S01 may be kneading, ball milling or other conventional mixing methods. In order to make the mixing effect better, the preferable kneading and ball milling modes can apply external pressure during mixing, so that various fillers are mixed more uniformly and fused more thoroughly. The number of grinding steps after cooling is adjusted according to the requirement, and generally, the grinding steps are performed for more than three times. The components of vinyl silicone oil, heat conducting stuffing, heat resisting agent, fire retardant and reinforcing stuffing which are not crosslinked are first mixed and dispersed thoroughly. The various fillers are uniformly distributed, so that the base colloid is uniform in texture and stable in performance. The base gum is then ground several times after cooling until the particle size reaches the desired level in order to be uniformly distributed throughout the silica gel material.
The mixing process in step S02 may be stirring or other mixing process. The stirring treatment can lead the reaction to be more rapid and thorough, and simultaneously can lead the base rubber, namely the mixture of various fillers, to be evenly distributed in the rubber material.
The compression molding in step S03 may be a roll molding or a vulcanization compression molding.
The silica gel sheet is obtained by simple preparation process and reasonable proportion. The heat conduction performance, the heat stability performance and the flame retardance performance are all considered, so that the application range of the silica gel sheet is wider. Such as in the field of new energy batteries, PTC heaters, or other special fields.
The preparation method of the silica gel sheet has simple process but comprehensive process. Firstly, various modified fillers and non-reactive main raw materials are mixed and ground to prepare base rubber, so that a 'functional package' with multiple functions and uniform texture is formed. And then, by reasonable raw material proportion and process condition control, all basic material properties and all functional properties of the silica gel sheet are perfectly unified together, and the silica gel sheet has both functionality and practicability.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Example 1
(1) 100 parts of vinyl silicone oil with the viscosity of 20000mpa.s, 200 parts of aluminum oxide, 100 parts of magnesium oxide, 0.5 part of cerium oxide, 100 parts of melamine cyanurate with the particle size of 2 microns and 2 parts of vinyl MQ silicone resin with the vinyl content of 3% are added into a kneader for kneading, wherein the temperature of the kneading process is controlled at 120 ℃ and the kneading time is 2 hours. And (3) grinding the mixture for 3 times by a grinder after cooling to prepare the base adhesive.
(2) Adding 3 parts of base adhesive, 0.6% hydrogen-containing silicone oil and 0.003 parts of alkynol inhibitor into a stirrer, stirring for 20min, and adding 2 parts of platinum catalyst and stirring for 8min.
(3) The resulting compound was calendered with a calender or molded into a 2mm test piece using a flat vulcanizing machine.
Example 2
(1) 100 parts of vinyl silicone oil with the viscosity of 20000mpa.s, 100 parts of boron nitride, 100 parts of zinc oxide, 1 part of ferric oxide, 120 parts of melamine cyanurate with the particle size of 5 microns and 5 parts of fumed silica with the specific surface area of 300 are added into a kneader for kneading, and the temperature of the kneading process is controlled at 130 ℃ and the kneading time is 2.5 hours. And (3) grinding the mixture for 3 times by a grinder after cooling to prepare the base adhesive.
(2) The base adhesive, 2.5 parts of hydrogen-containing silicone oil with the hydrogen content of 0.8% and 0.004 part of alkynol inhibitor are added into a stirrer, stirred for 15min, and then added with 2.5 parts of platinum catalyst and stirred for 10min.
(3) The resulting compound was calendered with a calender or molded into a 2mm test piece using a flat vulcanizing machine.
Example 3
(1) 100 parts of vinyl silicone oil having a viscosity of 80000mPa.s, 100 parts of alumina, 100 parts of silicon carbide, 1 part of carbon black, 150 parts of melamine cyanurate having a particle diameter of 10 μm, and 5 parts of vinyl MQ silicone resin having a vinyl content of 2% were kneaded in a kneader at a temperature of 140℃for 3 hours. And (3) grinding the mixture for 3 times by a grinder after cooling to prepare the base adhesive.
(2) Adding 4 parts of base adhesive, 0.5% hydrogen-containing silicone oil and 0.004 parts of alkynol inhibitor into a stirrer, stirring for 10min, and adding 2.5 parts of platinum catalyst and stirring for 10min.
(3) The resulting compound was calendered with a calender or molded into a 2mm test piece using a flat vulcanizing machine.
Example 4
(1) 100 parts of vinyl silicone oil with the viscosity of 100000mPa.s, 150 parts of aluminum oxide, 100 parts of zinc oxide, 1 part of cerium oxide, 150 parts of melamine cyanurate with the particle size of 2 microns and 2 parts of vinyl MQ silicone resin with the vinyl content of 3.5% are added into a kneader for kneading, wherein the temperature of the kneading process is controlled at 135 ℃ and the kneading time is 3 hours. And (3) grinding the mixture for 3 times by a grinder after cooling to prepare the base adhesive.
(2) Adding 3 parts of hydrogen-containing silicone oil with the hydrogen content of 0.5% and 0.005 part of alkynol inhibitor into a stirrer, stirring for 20min, and adding 3 parts of platinum catalyst and stirring for 8min.
(3) The resulting compound was calendered with a calender or molded into a 2mm test piece using a flat vulcanizing machine.
Comparative example 1
(1) 100 parts of vinyl silicone oil with the viscosity of 20000mpa.s, 200 parts of aluminum oxide, 100 parts of magnesium oxide, 100 parts of melamine cyanurate with the particle size of 5 microns and 2 parts of vinyl MQ silicone resin with the vinyl content of 3% are added into a kneader for kneading, wherein the temperature of the kneading process is controlled at 120 ℃ and the kneading time is 2 hours. And (3) grinding the mixture for 3 times by a grinder after cooling to prepare the base adhesive.
(2) Adding 3 parts of base adhesive, 0.6% hydrogen-containing silicone oil and 0.003 parts of alkynol inhibitor into a stirrer, stirring for 20min, and adding 2 parts of platinum catalyst and stirring for 8min.
(3) The resulting compound was calendered with a calender or molded into a 2mm test piece using a flat vulcanizing machine.
Comparative example 2
(1) 100 parts of vinyl silicone oil having a viscosity of 50000mPa.s, 100 parts of boron nitride, 100 parts of magnesium oxide, 0.5 part of cerium oxide, 2 parts of vinyl MQ silicone resin having a vinyl content of 3% are kneaded in a kneader at a kneading temperature of 120℃for 2 hours. After cooling, grinding with a grinder for 3 times. Preparing into base adhesive.
(2) Adding 3 parts of base adhesive, 0.6% hydrogen-containing silicone oil and 0.003 parts of alkynol inhibitor into a stirrer, stirring for 20min, and adding 2 parts of platinum catalyst and stirring for 8min.
(3) The resulting compound was calendered with a calender or molded into a 2mm test piece using a flat vulcanizing machine.
TABLE 1 comparative data before and after aging of test pieces of examples 1 to 4 and comparative examples 1 to 2
Table 1 shows the comparative data before and after aging of the test pieces of examples 1 to 4 and comparative examples 1 to 2, and the comparative data shows that examples 1 to 4 have high temperature resistance, are suitable for use at high temperature, have a certain thermal conductivity, and can achieve UL94V-0 flame retardant rating.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims (8)

1. The silica gel sheet is characterized by comprising the following components in parts by weight:
100 parts of vinyl silicone oil
0.5 to 5 parts of hydrogen silicone oil
100-500 parts of heat conducting filler
0.1 to 1 part of heat resistant agent
100-300 parts of flame retardant
2-5 parts of reinforcing filler
1 to 5 parts of catalyst
0.001 to 0.005 part of inhibitor; the viscosity of the vinyl silicone oil at 25 ℃ is 20000-100000 mPa.s; the mass fraction of hydrogen element in the hydrogen-containing silicone oil is 0.1-1%; the flame retardant is melamine cyanurate.
2. The silicone wafer of claim 1, wherein the thermally conductive filler comprises one or more of aluminum oxide, magnesium oxide, silicon carbide, zinc oxide, and boron nitride.
3. The silica gel sheet of claim 1 wherein the heat resistant agent is any one of iron oxide, cerium oxide, and carbon black.
4. The silicone sheet of claim 1, wherein the reinforcing filler is white carbon black or MQ silicone.
5. The silicone sheet of claim 1, wherein the catalyst is a platinum catalyst.
6. The silicone wafer of claim 1, wherein the inhibitor is an alkynol inhibitor.
7. The method for producing a silica gel sheet according to any one of claims 1 to 6, characterized by comprising the steps of:
obtaining each component according to the component types and the component parts by weight contained in the silica gel sheet in claim 1;
carrying out first mixing treatment on the obtained vinyl silicone oil, the heat conducting filler, the heat resisting agent, the flame retardant and the reinforcing filler for 1-3 hours at the temperature of 110-140 ℃, cooling and grinding to obtain base adhesive; the first mixing treatment mode is kneading or ball milling;
after the base rubber, the hydrogen-containing silicone oil and the inhibitor are subjected to second mixing treatment, adding a catalyst to perform third mixing treatment, and obtaining a rubber material; the second mixing treatment and the third mixing treatment are independently stirring;
and (3) carrying out compression molding on the sizing material to obtain the silica gel sheet.
8. Use of the silica gel sheet according to any one of claims 1 to 6 or the silica gel sheet prepared by the preparation method according to claim 7 in a new energy battery or a PTC heater.
CN202410007128.4A 2018-09-30 2018-09-30 Silica gel sheet and preparation method and application thereof Pending CN117844255A (en)

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CN110577661B (en) * 2019-09-26 2022-02-01 江苏中迪新材料技术有限公司 Silicone membrane, heat-conducting silicone sheet and preparation method thereof
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