CN107033602A - Used in composite insulator high-strength silicone rubber insulating materials - Google Patents
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- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
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Abstract
The invention belongs to rubber product technical field, used in composite insulator high-strength silicone rubber insulating materials is specifically disclosed.In parts by weight, the material includes：62~88 parts of methyl vinyl silicon kautschuk, 30~48 parts of gas-phase silica, 22~32 parts of nano-aluminum hydroxide, 63~78 parts of graphene oxide, 24~35 parts of nanometer BN, 1.2~3 parts of silicon powder, 2~3 parts of hydroxy silicon oil, 1.5~2 parts of ethyl silicon oil, 1.2~2.2 parts of silane coupler.Product formula of the present invention is scientific and reasonable, has good insulating properties by actually detected, while having enough hardness（Shore hardness is up to more than 80 °）, intensity（Tensile strength is up to more than 5.5MPa, and tearing strength is up to more than 38kN/m）, elongation is unlikely to deform up to 450%, and anti creepage trace performance reaches 1A4.5 grades, fully meets the use requirement of silicone rubber for composite insulator insulating materials.
Description
Technical field
The invention belongs to rubber product technical field, and in particular to a kind of used in composite insulator high-strength silicone rubber insulation material
Material.
Background technology
Composite insulator is power transmission and transformation line and electrification railway contact net main electric power equipment part, and it is combined by glass
Material plug and silicon rubber umbrella skirt are constituted.Composite insulator has that light weight, intensity be high, resistance to pollution flashover ability strong, without null value, manufacture
The advantages of technical maturity, operation maintenance facilitate.
Silicon rubber umbrella skirt in composite insulator plays a part of bearing high voltage electric field and protection composite electric insulator core bar, because
This require silicon rubber there is high insulation, it is high-low temperature resistant, resistance to electric trace, resistance to electric arc, weather-proof and with suitable physical and mechanical properties.
Silicon rubber is relative to ceramics and ethylene propylene diene monomer (EPDM) material, and its electrical insulation properties, high and low temperature resistance, weather-proof and resistance to pollution flashover are excellent
It is different, it is widely used on the composite insulator of high-tension power transmission and transformation equipment.Although silicon rubber has preferable electric property in itself,
But to apply in terms of high-voltage electrical apparatus, in addition it is also necessary to processing is modified for its integrated performance index, therefore, insulator is studied
Silicone rubber insulation material has very positive meaning.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of used in composite insulator high-strength silicone rubber insulating materials, with
Parts by weight meter, the material includes：62~88 parts of methyl vinyl silicon kautschuk, 30~48 parts of gas-phase silica, nanometer hydrogen-oxygen
Change 22~32 parts of aluminium, 63~78 parts of graphene oxide, 24~35 parts of nanometer BN, 1.2~3 parts of silicon powder, hydroxy silicon oil 2~3
Part, 1.5~2 parts of ethyl silicon oil, 1.2~2.2 parts of silane coupler；The methyl vinyl silicon kautschuk is by contents of ethylene
The rubber that rubber and contents of ethylene for 0.1% are 0.16% is constituted according to the ︰ 2.7~3.3 of mass ratio 1~1.2；
The used in composite insulator high-strength silicone rubber insulating materials is prepared according to following steps：
（1）The methyl second that the methyl vinyl silicon kautschuk for being 0.1% by contents of ethylene is 0.16% with contents of ethylene
Alkenyl raw-silastic continuously is added in kneader according to above-mentioned quality proportioning, and 5~8min is stirred in kneader；
（2）By point 4 additions of gas-phase silica, nanometer BN and silane coupler, it is sufficiently stirred for, is kneaded after adding every time
Glue；
（3）Nano-aluminum hydroxide, graphene oxide, silicon powder, hydroxy silicon oil, ethyl silicon oil are sequentially added into above-mentioned elastomeric compound
And silane coupler, it is kneaded and formed；
（4）After kneaded and formed, 160~165 DEG C are warming up to, is vacuumized, react 1.5~2h, after the completion of reaction, lead to cooling water
It is cooled to 70 DEG C, plastic emitting；Room temperature is cooled to after plastic emitting, product is obtained.
It is preferred that, above-mentioned used in composite insulator high-strength silicone rubber insulating materials, in parts by weight, the material includes：First
66~80 parts of base vinyl silicon kautschuk, 35~45 parts of gas-phase silica, 22~30 parts of nano-aluminum hydroxide, graphene oxide
65~75 parts, 25~30 parts of nanometer BN, 1.2~2.5 parts of silicon powder, 2.5~3 parts of hydroxy silicon oil, 1.5~2 parts of ethyl silicon oil,
1.2~2.0 parts of silane coupler.
It is furthermore preferred that above-mentioned used in composite insulator high-strength silicone rubber insulating materials, in parts by weight, the material includes：
72 parts of methyl vinyl silicon kautschuk, 40 parts of gas-phase silica, 28 parts of nano-aluminum hydroxide, 70 parts of graphene oxide, nanometer
28 parts of BN, 2.0 parts of silicon powder, 2.5 parts of hydroxy silicon oil, 2 parts of ethyl silicon oil, 1.8 parts of silane coupler.
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the contents of ethylene is 0.1% first
The mean molecule quantity of base vinyl silicon kautschuk is 500,000, and the contents of ethylene is 0.16% methyl vinyl silicone rubber
The mean molecule quantity of rubber is 600,000.
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the specific surface area of the gas-phase silica
For 200~300m2/ g, 12~25nm of average grain diameter.
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the particle diameter of the nano-aluminum hydroxide is
50~80nm.
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the particle diameter of the nanometer BN for 20~
30nm。
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the graphene oxide is mono-layer oxidized
Graphene powder, 0.5~1um of fineness.
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the silane coupler be KH-560,
KH-570, vinyltrimethoxy silane or VTES.
Compared with prior art, the beneficial effects of the invention are as follows：Product formula of the present invention is scientific and reasonable, by actually detected
With good insulating properties, while having enough hardness（Shore hardness is up to more than 80 °）, intensity（Tensile strength is up to
More than 5.5MPa, tearing strength is up to more than 38kN/m）, elongation is unlikely to deform up to 450%, and anti creepage trace performance reaches
To 1A4.5 grades, it is fully able to meet the use requirement of silicon rubber compound insulator outer insulating material.
Embodiment
The invention provides a kind of silicone rubber for composite insulator insulating materials of high intensity, in parts by weight, the material
Including：62~88 parts of methyl vinyl silicon kautschuk, 30~48 parts of gas-phase silica, 22~32 parts of nano-aluminum hydroxide, oxygen
63~78 parts of graphite alkene, 24~35 parts of nanometer BN, 1.2~3 parts of silicon powder, 2~3 parts of hydroxy silicon oil, ethyl silicon oil 1.5~2
Part, 1.2~2.2 parts of silane coupler；Rubber and second of the methyl vinyl silicon kautschuk by contents of ethylene for 0.1%
Amount vinyl content constitutes for 0.16% rubber according to the ︰ 2.7~3.3 of mass ratio 1~1.2；The specific surface area of the gas-phase silica is
200~300m2/ g, 12~25nm of average grain diameter；The particle diameter of the nano-aluminum hydroxide is 50~80nm, the grain of the nanometer BN
Footpath is 20~30nm, and the graphene oxide is single-layer graphene oxide powder, 0.5~1um of fineness；
The used in composite insulator high-strength silicone rubber insulating materials is prepared according to following steps：
（1）The methyl second that the methyl vinyl silicon kautschuk for being 0.1% by contents of ethylene is 0.16% with contents of ethylene
Alkenyl raw-silastic continuously is added in kneader according to above-mentioned quality proportioning, and 5~8min is stirred in kneader；
（2）By point 4 additions of gas-phase silica, nanometer BN and silane coupler, it is sufficiently stirred for, is kneaded after adding every time
Glue；
（3）Nano-aluminum hydroxide, graphene oxide, silicon powder, hydroxy silicon oil, ethyl silicon oil are sequentially added into above-mentioned elastomeric compound
And silane coupler, it is kneaded and formed；
（4）After kneaded and formed, 160~165 DEG C are warming up to, is vacuumized, react 1.5~2h, after the completion of reaction, lead to cooling water
It is cooled to 70 DEG C, plastic emitting；Room temperature is cooled to after plastic emitting, product is obtained.
It is preferred that, above-mentioned used in composite insulator high-strength silicone rubber insulating materials, in parts by weight, the material includes：First
66~80 parts of base vinyl silicon kautschuk, 35~45 parts of gas-phase silica, 22~30 parts of nano-aluminum hydroxide, graphene oxide
65~75 parts, 25~30 parts of nanometer BN, 1.2~2.5 parts of silicon powder, 2.5~3 parts of hydroxy silicon oil, 1.5~2 parts of ethyl silicon oil,
1.2~2.0 parts of silane coupler.
It is furthermore preferred that above-mentioned used in composite insulator high-strength silicone rubber insulating materials, in parts by weight, the material includes：
72 parts of methyl vinyl silicon kautschuk, 40 parts of gas-phase silica, 28 parts of nano-aluminum hydroxide, 70 parts of graphene oxide, nanometer
28 parts of BN, 2.0 parts of silicon powder, 2.5 parts of hydroxy silicon oil, 2 parts of ethyl silicon oil, 1.8 parts of silane coupler.
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the contents of ethylene is 0.1% life
The mean molecule quantity of glue is 500,000, and the mean molecule quantity for the rubber that the contents of ethylene is 0.16% is 600,000.
Wherein, in above-mentioned used in composite insulator high-strength silicone rubber insulating materials, the silane coupler be KH-560,
KH-570, vinyltrimethoxy silane or VTES.
Product of the present invention is by obtained by inventor's test of many times, scientific formulation rationally, adds a variety of nanometers in formula
Grain with silicon rubber be combined, form special interface interphase, make composite microstructure and compactness obtain it is bright
Aobvious improves, while improving the mechanical performance of material.Wherein, graphene oxide can play good insulation effect
Really, the heat conductivility of reinforcing material is capable of in nanometer BN addition, slow down the voltage ageing process of silicone rubber matrix material, therefore assign
Give the excellent electrical breakdown withstand performance of material, anti creepage trace performance.There are good insulating properties by actually detected, have simultaneously
There is enough hardness（Shore hardness is up to more than 80 °）, intensity（Tensile strength is up to more than 5.5MPa, and tearing strength is up to
More than 38kN/m）, elongation is unlikely to deform up to 450%, and anti creepage trace performance reaches 1A4.5 grades, is fully able to meet
The use requirement of silicon rubber compound insulator outer insulating material.
The present invention is made further explanation and description below in conjunction with specific embodiment, but and is not so limited the present invention
Protection domain.
Embodiment 1
Used in composite insulator high-strength silicone rubber insulating materials, in parts by weight, the material includes：Methyl vinyl silicone rubber is given birth to
66 parts of glue, 45 parts of gas-phase silica, 30 parts of nano-aluminum hydroxide, 65 parts of graphene oxide, 30 parts of nanometer BN, silicon powder 2.5
Part, 2.5 parts of hydroxy silicon oil, 1.5 parts of ethyl silicon oil, 2 parts of silane coupler KH-560；The specific surface area of gas-phase silica is
250m2/ g, average grain diameter 20nm；The particle diameter of nano-aluminum hydroxide is 60nm, and nanometer BN particle diameter is 30nm, and graphene oxide is
Single-layer graphene oxide powder, fineness 0.5um；
The used in composite insulator high-strength silicone rubber insulating materials is prepared according to following steps：
（1）The methyl second that the methyl vinyl silicon kautschuk for being 0.1% by contents of ethylene is 0.16% with contents of ethylene
Alkenyl raw-silastic continuously is added in kneader according to the ︰ 3.0 of mass ratio 1.2, and 6min is stirred in kneader；
（2）By gas-phase silica, nanometer BN and KH-560（0.8 part）Divide 4 additions, be sufficiently stirred for, mixed after adding every time
Refining glue；
（3）Nano-aluminum hydroxide, graphene oxide, silicon powder, hydroxy silicon oil, ethyl silicon oil are sequentially added into above-mentioned elastomeric compound
And KH-560（0.8 part）, it is kneaded and formed；
（4）After kneaded and formed, 160 DEG C are warming up to, is vacuumized, react 1.5h, after the completion of reaction, lead to cooling water temperature to 70
DEG C, plastic emitting；Room temperature is cooled to after plastic emitting, product is obtained.
Embodiment 2
Used in composite insulator high-strength silicone rubber insulating materials, in parts by weight, the material includes：Methyl vinyl silicone rubber is given birth to
80 parts of glue, 35 parts of gas-phase silica, 20 parts of nano-aluminum hydroxide, 75 parts of graphene oxide, 25 parts of nanometer BN, silicon powder 1.2
Part, 3.0 parts of hydroxy silicon oil, 2.0 parts of ethyl silicon oil, 1.2 parts of vinyltrimethoxy silane；The specific surface area of gas-phase silica is
300m2/ g, average grain diameter 16nm；The particle diameter of nano-aluminum hydroxide is 55nm, and nanometer BN particle diameter is 25nm, and graphene oxide is
Single-layer graphene oxide powder, fineness 0.6um；
The used in composite insulator high-strength silicone rubber insulating materials is prepared according to following steps：
（1）The methyl second that the methyl vinyl silicon kautschuk for being 0.1% by contents of ethylene is 0.16% with contents of ethylene
Alkenyl raw-silastic continuously is added in kneader according to the ︰ 2.8 of mass ratio 1.2, and 8min is stirred in kneader；
（2）By gas-phase silica, nanometer BN and vinyltrimethoxy silane（0.6 part）Divide 4 additions, after adding every time fully
Stirring, obtains elastomeric compound；
（3）Nano-aluminum hydroxide, graphene oxide, silicon powder, hydroxy silicon oil, ethyl silicon oil are sequentially added into above-mentioned elastomeric compound
And vinyltrimethoxy silane（0.6 part）, it is kneaded and formed；
（4）After kneaded and formed, 162 DEG C are warming up to, is vacuumized, react 2h, after the completion of reaction, lead to cooling water temperature to 70
DEG C, plastic emitting；Room temperature is cooled to after plastic emitting, product is obtained.
Embodiment 3
Used in composite insulator high-strength silicone rubber insulating materials, in parts by weight, the material includes：Methyl vinyl silicone rubber is given birth to
72 parts of glue, 40 parts of gas-phase silica, 28 parts of nano-aluminum hydroxide, 70 parts of graphene oxide, 28 parts of nanometer BN, silicon powder 2.0
Part, 2.5 parts of hydroxy silicon oil, 2 parts of ethyl silicon oil, 1.8 parts of VTES；The specific surface area of gas-phase silica is
200m2/ g, average grain diameter 16nm；The particle diameter of nano-aluminum hydroxide is 55nm, and nanometer BN particle diameter is 25nm, and graphene oxide is
Single-layer graphene oxide powder, fineness 0.6um；
The used in composite insulator high-strength silicone rubber insulating materials is prepared according to following steps：
（1）The methyl second that the methyl vinyl silicon kautschuk for being 0.1% by contents of ethylene is 0.16% with contents of ethylene
Alkenyl raw-silastic continuously is added in kneader according to the ︰ 2.8 of mass ratio 1.2, and 8min is stirred in kneader；
（2）By gas-phase silica, nanometer BN and VTES（0.9 part）Divide 4 additions, after adding every time fully
Stirring, obtains elastomeric compound；
（3）Nano-aluminum hydroxide, graphene oxide, silicon powder, hydroxy silicon oil, ethyl silicon oil are sequentially added into above-mentioned elastomeric compound
And VTES（0.9 part）, it is kneaded and formed；
（4）After kneaded and formed, 160 DEG C are warming up to, is vacuumized, react 2h, after the completion of reaction, lead to cooling water temperature to 70
DEG C, plastic emitting；Room temperature is cooled to after plastic emitting, product is obtained.
Performance measurement, the measured data such as institute of table 1 are carried out for the product in embodiment 1, embodiment 2 and embodiment 3
Show.
The used in composite insulator high-strength silicone rubber insulating materials the performance test results of table 1
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Hardness（Shore A） | 89 | 83 | 86 |
| Tensile strength MPa | 5.6 | 5.9 | 5.8 |
| Tearing strength KN/m | 38.7 | 39.6 | 40.1 |
| Elongation % | 450 | 437 | 441 |
| Insulaion resistance Ω | 10.5 | 10.8 | 10.6 |
| Anti creepage trace | 1A4.5 | 1A4.5 | 1A4.5 |
Described above is the preferred embodiments of the present invention, it is noted that for those skilled in the art, is not departing from this
On the premise of inventive structure, various modifications and improvements can be made, these should also be as being considered as protection scope of the present invention, these
The effect and the practicality of this patent implemented all without the influence present invention.
Claims (9)
1. used in composite insulator high-strength silicone rubber insulating materials, it is characterised in that in parts by weight, the material includes：Methyl
62~88 parts of vinyl silicon kautschuk, 30~48 parts of gas-phase silica, 22~32 parts of nano-aluminum hydroxide, graphene oxide 63
~78 parts, 24~35 parts of nanometer BN, 1.2~3 parts of silicon powder, 2~3 parts of hydroxy silicon oil, 1.5~2 parts of ethyl silicon oil, silane is even
Join 1.2~2.2 parts of agent；The rubber and contents of ethylene that the methyl ethylene silicon rubber rubber is 0.1% by contents of ethylene be
0.16% rubber is constituted according to the ︰ 2.7~3.3 of mass ratio 1~1.2；
The used in composite insulator high-strength silicone rubber insulating materials is prepared according to following steps：
（1）The methyl second that the methyl vinyl silicon kautschuk for being 0.1% by contents of ethylene is 0.16% with contents of ethylene
Alkenyl raw-silastic continuously is added in kneader according to above-mentioned quality proportioning, and 5~8min is stirred in kneader；
（2）By point 4 additions of gas-phase silica, nanometer BN and silane coupler, it is sufficiently stirred for, is kneaded after adding every time
Glue；
（3）Nano-aluminum hydroxide, graphene oxide, silicon powder, hydroxy silicon oil, ethyl silicon oil are sequentially added into above-mentioned elastomeric compound
And silane coupler, it is kneaded and formed；
（4）After kneaded and formed, 160~165 DEG C are warming up to, is vacuumized, react 1.5~2h, after the completion of reaction, lead to cooling water
It is cooled to 70 DEG C, plastic emitting；Room temperature is cooled to after plastic emitting, product is obtained.
2. used in composite insulator high-strength silicone rubber insulating materials according to claim 1, it is characterised in that with parts by weight
Meter, the material includes：66~80 parts of methyl vinyl silicon kautschuk, 35~45 parts of gas-phase silica, nano-aluminum hydroxide 22
~30 parts, 65~75 parts of graphene oxide, 25~30 parts of nanometer BN, 1.2~2.5 parts of silicon powder, 2.5~3 parts of hydroxy silicon oil,
1.5~2 parts of ethyl silicon oil, 1.2~2.0 parts of silane coupler.
3. used in composite insulator high-strength silicone rubber insulating materials according to claim 2, it is characterised in that with parts by weight
Meter, the material includes：72 parts of methyl vinyl silicon kautschuk, 40 parts of gas-phase silica, 28 parts of nano-aluminum hydroxide aoxidizes stone
Black 70 parts of alkene, 28 parts of nanometer BN, 2.0 parts of silicon powder, 2.5 parts of hydroxy silicon oil, 2 parts of ethyl silicon oil, 1.8 parts of silane coupler.
4. the used in composite insulator high-strength silicone rubber insulating materials according to any one of claims 1 to 3, its feature exists
In the mean molecule quantity for the methyl vinyl silicon kautschuk that the contents of ethylene is 0.1% is 500,000, and the vinyl contains
The mean molecule quantity for the methyl vinyl silicon kautschuk that amount is 0.16% is 600,000.
5. the used in composite insulator high-strength silicone rubber insulating materials according to any one of claims 1 to 3, its feature exists
In the specific surface area of the gas-phase silica is 200~300m2/ g, 12~25nm of average grain diameter.
6. the used in composite insulator high-strength silicone rubber insulating materials according to any one of claims 1 to 3, its feature exists
In the particle diameter of the nano-aluminum hydroxide is 50~80nm.
7. the used in composite insulator high-strength silicone rubber insulating materials according to any one of claims 1 to 3, its feature exists
In the particle diameter of the nanometer BN is 20~30nm.
8. the used in composite insulator high-strength silicone rubber insulating materials according to any one of claims 1 to 3, its feature exists
In the graphene oxide is single-layer graphene oxide powder, 0.5~1um of fineness.
9. the used in composite insulator high-strength silicone rubber insulating materials according to any one of claims 1 to 3, its feature exists
In the silane coupler is KH-560, KH-570, vinyltrimethoxy silane or VTES.
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| CN108962426A (en) * | 2018-05-30 | 2018-12-07 | 中国科学院过程工程研究所 | A kind of silicon rubber insulation composite material, preparation method and use |
| CN109135002A (en) * | 2018-06-28 | 2019-01-04 | 西安唯实输配电技术有限公司 | A kind of polymer insulator material and preparation method thereof |
| CN109135289A (en) * | 2018-07-16 | 2019-01-04 | 江苏省苏安能节能建材科技有限公司 | A kind of water base graphene oxide/aluminium silicon rubber can porcelain flexible clay facing tile and its preparation and application |
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| CN111808429A (en) * | 2020-07-22 | 2020-10-23 | 江东金具设备有限公司 | Silicone rubber material for composite insulator and preparation method thereof |
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| CN107664608A (en) * | 2017-10-27 | 2018-02-06 | 湖北兴瑞化工有限公司 | A kind of method for detecting low vinyl methyl vinyl silicone rubber contents of ethylene |
| CN108962426A (en) * | 2018-05-30 | 2018-12-07 | 中国科学院过程工程研究所 | A kind of silicon rubber insulation composite material, preparation method and use |
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| CN109135289A (en) * | 2018-07-16 | 2019-01-04 | 江苏省苏安能节能建材科技有限公司 | A kind of water base graphene oxide/aluminium silicon rubber can porcelain flexible clay facing tile and its preparation and application |
| CN109337373A (en) * | 2018-09-27 | 2019-02-15 | 芜湖扬展新材料科技服务有限公司 | A kind of high temperature vulcanized melting silicone rubber and its production technology |
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| CN112441824B (en) * | 2020-12-11 | 2021-06-29 | 湖南兴诚电瓷电器有限公司 | Low-temperature-resistant high-voltage power transmission porcelain insulator and preparation method thereof |
| CN112441824A (en) * | 2020-12-11 | 2021-03-05 | 湖南兴诚电瓷电器有限公司 | Low-temperature-resistant high-voltage power transmission porcelain insulator and preparation method thereof |
| CN113683891A (en) * | 2021-09-15 | 2021-11-23 | 湖南翰坤实业有限公司 | Insulating material and preparation method thereof |
| CN113683891B (en) * | 2021-09-15 | 2023-01-31 | 湖南翰坤实业有限公司 | Insulating material and preparation method thereof |
| CN114898929A (en) * | 2022-06-06 | 2022-08-12 | 浙江汉信光电股份有限公司 | Photoelectric composite cable |
| CN114898929B (en) * | 2022-06-06 | 2024-03-22 | 浙江汉信光电股份有限公司 | Photoelectric composite cable |
| CN115353743A (en) * | 2022-08-16 | 2022-11-18 | 湖南东方辉陵电气有限公司 | Antifouling silicone rubber insulator and preparation method thereof |
| CN115353743B (en) * | 2022-08-16 | 2023-03-10 | 湖南东方辉陵电气有限公司 | Antifouling silicone rubber insulator and preparation method thereof |
| CN117050668A (en) * | 2023-08-16 | 2023-11-14 | 东莞中能膜业科技有限公司 | Protective film applied to new energy battery shell and preparation method thereof |
| CN117050668B (en) * | 2023-08-16 | 2024-01-30 | 东莞中能膜业科技有限公司 | Protective film applied to new energy battery shell and preparation method thereof |
| CN117417640A (en) * | 2023-12-18 | 2024-01-19 | 江东金具设备有限公司 | Silicone rubber compound, and preparation method and application thereof |
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Application publication date: 20170811 |