CN109777118A - A kind of High-Voltage Insulation heat-conducting silica gel sheet and preparation method thereof - Google Patents
A kind of High-Voltage Insulation heat-conducting silica gel sheet and preparation method thereof Download PDFInfo
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- CN109777118A CN109777118A CN201811618021.4A CN201811618021A CN109777118A CN 109777118 A CN109777118 A CN 109777118A CN 201811618021 A CN201811618021 A CN 201811618021A CN 109777118 A CN109777118 A CN 109777118A
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Abstract
The invention discloses a kind of High-Voltage Insulation heat-conducting silica gel sheet and preparation method thereof, the component of the heat-conducting silica gel sheet includes both-end vinyl silicone oil, containing hydrogen silicone oil, platinum catalyst, acetylenic alcohol inhibitor, titanate coupling agent, 5 microns of refined aluminum hydroxides, 20 microns of refined aluminum hydroxides, 40 microns of refined aluminum hydroxides, precipitated silica, mill bases；The preparation method is the refinement treatment of aluminium hydroxide, the silane coupling agent hydrophobic treatment of refined aluminum hydroxide, the production of high insulating heat-conductive silica gel piece.Present invention optimizes the proportion of heat-conducting silica gel sheet and techniques, refinement treatment and coupling agent hydrophobic treatment are successively carried out to aluminium hydroxide inorganic particle, metal ion and water-soluble impurity excessive in inorganic particle are not removed only, and obviously reduce the hygroscopicity of inorganic particle, hydrophobicity substantially improves, so that the heat-conducting silica gel sheet after vulcanization is also able to maintain good insulation performance in wet environment, it can satisfy and very high application field is required to insulation performance.
Description
Technical field
The invention belongs to electronics industry fields, and in particular to a kind of High-Voltage Insulation heat-conducting silica gel sheet and preparation method thereof.
Background technique
Heat-conducting silica gel sheet is the various auxiliary materials such as addition metal oxide using silicon as substrate, one synthesized by special process
Kind of heat-conducting medium material, in industry, also known as thermal conductive silicon rubber mat, thermally conductive silica gel piece, soft heat conductive pad, heat conductive silica gel gasket
Etc., it is to be produced exclusively for the design scheme using gap transmitting heat, it being capable of blind, completion heating position and heat dissipation
Heat transmitting between position, while the effects of also act as insulation, damping, sealing, it can satisfy device miniaturization and lightening set
Meter requires, great public welfare and usability, and thickness is applied widely, is a kind of splendid conductive filler material.
General heat-conducting silica gel sheet is with aluminium hydroxide, aluminium oxide, zinc oxide, silica, silicon powder, boron nitride, aluminium nitride
Equal inorganic particles serve as heat conductive insulating medium, and wherein the best inorganic particle of insulating properties is aluminium hydroxide, although insulation performance phase
It is much better to other powders, if but not by coupling agent hydrophobic treatment and refinement treatment, powder has stronger moisture absorption
Property, and having excessive metal ion and water-soluble impurity, the heat-conducting silica gel sheet after making vulcanization insulate in wet environment
There are many performance decline, therefore although existing heat-conducting silica gel sheet has certain insulating properties, but are not still able to satisfy to insulating properties
It can require very high application field.
Summary of the invention
In view of the deficiency of the prior art, the present invention is intended to provide a kind of High-Voltage Insulation heat-conducting silica gel sheet and its
Preparation method has water resistance good, and good insulation preformance, good heat conduction effect, specific gravity is small, fire-retardant to wait excellent performances, is become with meeting
Depressor, inverter etc. require insulation performance the application of very high high voltage electric equipment products.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:
A kind of High-Voltage Insulation heat-conducting silica gel sheet includes 200-450 parts of both-end vinyl silicone oil, contains by weight
10-20 parts of hydrogen silicone oil, 2.5-7.5 parts of platinum catalyst, 0.1-0.5 parts of acetylenic alcohol inhibitor, 3-17 parts of titanate coupling agent, 5 is micro-
350-600 parts of silane treatment refined aluminum hydroxide of rice, 20 microns 650-1050 parts of silane treatment refined aluminum hydroxide, 40 micron silicons
Alkane handles refined aluminum hydroxide 300-850 parts, 40-80 parts of precipitated silica, 0.1-1.5 parts of mill base；
The both-end vinyl silicone oil: matrix resin assigns material most basic performance；
The containing hydrogen silicone oil: it is acted on matrix resin crosslinking curing；
The platinum catalyst: catalysis silicone oil is chemically reacted；
The acetylenic alcohol inhibitor: delay silicon Hydrochemistry reaction carries out, and increases operability；
The titanate coupling agent: increase the binding ability and wetting ability in formula between each component；
5 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and centainly fire-retardant are assigned
Property；
20 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and centainly fire-retardant are assigned
Property；
40 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and centainly fire-retardant are assigned
Property；
The precipitated silica: anti-settling performance, insulating properties and the certain material of material after the completion of stirring are assigned
Expect thermal conductivity；
The mill base: product colour is assigned.
Further, silane treatment refined aluminum hydroxide is not limited only to 5 microns of partial size in above-mentioned formula, and 20 microns, 40
Three kinds of partial sizes of micron also can choose nanoscale, submicron order, the various partial size powder compoundings of micron order or exclusive use.
Further, the containing hydrogen silicone oil includes side containing hydrogen silicone oil or end containing hydrogen silicone oil.
Further, the both-end vinyl silicone oil part can be replaced with high-vinyl silicone oil.
Further, the titanate coupling agent can be replaced with silane coupling agent.
Further, the acetylenic alcohol inhibitor can be replaced with maleic acid anhydride inhibitor.
A kind of preparation method of High-Voltage Insulation heat-conducting silica gel sheet, comprising the following steps:
The refinement treatment of step 1 aluminium hydroxide；
1) by 5 microns of aluminium hydroxides and deionized water, in mass ratio 1:(2-5) it is added in stirred tank, 100 DEG C of heating stirrings
It is filtered after 2-4h, obtains filter cake；
2) in filter cake and deionized water quality ratio 1:(3-6) ratio, be added deionized water in a stirring kettle, 100 DEG C plus
It is filtered after thermal agitation 2-4h, the filter cake that obtains that treated；
3) treated filter cake is cleaned with pure boiling water；
4) filter cake after cleaning dries 5h in 100-120 DEG C of oven, obtains 5 microns of refined aluminum hydroxides；
5) by 20 microns of aluminium hydroxides and 40 microns of aluminium hydroxides also according to above-mentioned 1) -4) the step of operate, respectively
To 20 microns of refined aluminum hydroxides and 40 microns of refined aluminum hydroxides；
Step 2 silane coupling agent hydrophobic treatment refined aluminum hydroxide；
By 5 microns of refined aluminum hydroxides obtained above and silane coupling agent 100:(0.5-1.5 in mass ratio), addition is stirred
It mixes in kettle, 100 DEG C of heating stirring 2-4h, sealed package is stand-by after cooling, obtains 5 microns of silane treatment refined aluminum hydroxides；
20 microns of aluminium hydroxide obtained above and 40 microns of aluminium hydroxides are operated after the same method, 20 micron silicons are made respectively
Alkane handles refined aluminum hydroxide and 40 microns of silane treatment refined aluminum hydroxides；
The production of the high insulating heat-conductive silica gel piece of step 3；
3) in parts by weight, to experiment board material mixing kettle in sequentially add 200-450 parts both-end vinyl silicone oil,
10-20 parts of containing hydrogen silicone oil, 0.1-0.5 parts of acetylenic alcohol inhibitor, 2.5-7.5 parts of platinum catalyst and 3-17 parts of titanate esters
Mixing speed 35-45r/min, high-speed stirred 15-25min is arranged in coupling agent, then reduction mixing speed to 30-35r/min,
Vacuumize 10-25min；
4) after completing above-mentioned steps, in parts by weight, the purification hydrogen-oxygen of 350-600 parts of 5 microns of silane treatments is added
Change aluminium, mixing speed 15-25r/min be set, in stir at low speed 2-3min, then improve mixing speed again to 25-35r/min,
Vacuumize 10-25min；
3) after completing above-mentioned steps, in parts by weight, the purification hydrogen of 650-1050 parts of 20 microns of silane treatments is added
Aluminium oxide, be arranged mixing speed 15-25r/min, in stir at low speed 2-3min, then improve mixing speed again to 25-35r/
Min vacuumizes 10-25min；
4) after completing above-mentioned steps, in parts by weight, the purification of 300-850 parts of 40 microns of silane treatments is sequentially added
Mixing speed 15-25r/min, middle low speed is arranged in aluminium hydroxide, 40-80 parts of precipitated silica and 0.1-1.5 parts of mill base
2-3min is stirred, mixing speed is then improved again to 25-35r/min, vacuumizes 10-25min；
5) after completing above-mentioned steps, mixing speed is reduced to 10-15r/min, and holding vacuumizes 20-35min, carries out scraper
6) according to product required thickness, discharging is rolled using calender；
7) product after calendering is carried out by high temperature vulcanized molding using long oven；
8) high temperature vulcanized product after molding is cut using guillotine, cuts into the finished product of required specification.
Further, in step 2, used silane coupling agent is methyltrimethoxysilane.
Further, it in step 2, in silane coupling agent hydrophobic treatment refined aluminum hydroxide, can add simultaneously micro
Precipitated silica.
Further, the 5 of step 3) in, being kept for the preferred time of vacuum is 30min.
Further, the 6 of step 3) in, the product thickness rolled out is 0.3-3.0mm.
Further, the 7 of step 3) in, curing temperature is 120-130 DEG C, vulcanization time 20-40min.
Compared with prior art, the beneficial effects of the present invention are:
Present invention optimizes the production proportions and production technology of heat-conducting silica gel sheet, inorganic to the preferable aluminium hydroxide of insulating properties
Powder successively carries out refinement treatment and coupling agent hydrophobic treatment, does not remove only metal ion excessive in inorganic particle and water-soluble
Property impurity, and obviously reduce the hygroscopicity of inorganic particle, hydrophobicity substantially improves, so that the thermal conductive silicon after vulcanization
Film is also able to maintain good insulation performance in wet environment.
High-Voltage Insulation heat-conducting silica gel sheet of the invention has water resistance good, good insulation preformance, good heat conduction effect, specific gravity
Small, fire-retardant equal excellent performances can satisfy and require very high application field to insulation performance, especially as transformer, inverter
Very high high voltage electronic apparatus is required Deng to insulation performance.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
A specific embodiment of the invention is shown in detail by following embodiment and its attached drawing.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the refinement treatment of aluminium hydroxide of the invention and the process flow chart of hydrophobic treatment；
Fig. 2 is the production technological process of High-Voltage Insulation heat-conducting silica gel sheet of the invention.
Specific embodiment
It is below with reference to the accompanying drawings and in conjunction with the embodiments, next that the present invention will be described in detail.
A kind of High-Voltage Insulation heat-conducting silica gel sheet includes 200-450 parts of both-end vinyl silicone oil, contains by weight
10-20 parts of hydrogen silicone oil, 2.5-7.5 parts of platinum catalyst, 0.1-0.5 parts of acetylenic alcohol inhibitor, 3-17 parts of titanate coupling agent, 5 is micro-
350-600 parts of silane treatment refined aluminum hydroxide of rice, 20 microns 650-1050 parts of silane treatment refined aluminum hydroxide, 40 micron silicons
Alkane handles refined aluminum hydroxide 300-850 parts, 40-80 parts of precipitated silica, 0.1-1.5 parts of mill base；
The both-end vinyl silicone oil: matrix resin assigns material most basic performance, can also use high-vinyl silicon
Oil replaces；
The containing hydrogen silicone oil: acting on matrix resin crosslinking curing, can select side containing hydrogen silicone oil or end containing hydrogen silicone oil；
The platinum catalyst: catalysis silicone oil is chemically reacted；
The acetylenic alcohol inhibitor: delay silicon Hydrochemistry reaction carries out, and increases operability, can also use maleic acid anhydride
Inhibitor replaces；
The titanate coupling agent: increasing the binding ability and wetting ability in formula between each component, can also be with
It is replaced with silane coupling agent；
5 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and centainly fire-retardant are assigned
Property；
20 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and centainly fire-retardant are assigned
Property；
40 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and centainly fire-retardant are assigned
Property；
The precipitated silica: anti-settling performance, insulating properties and the certain material of material after the completion of stirring are assigned
Expect thermal conductivity；
The mill base: product colour is assigned.
Further, silane treatment refined aluminum hydroxide is not limited only to 5 microns of partial size in above-mentioned formula, and 20 microns, 40
Three kinds of partial sizes of micron also can choose nanoscale, submicron order, the various partial size powder compoundings of micron order or exclusive use.
A kind of preparation method of High-Voltage Insulation heat-conducting silica gel sheet, referring to figure 1 and figure 2, comprising the following steps:
The refinement treatment of step 1 aluminium hydroxide；
1) by 5 microns of aluminium hydroxides and deionized water, in mass ratio 1:(2-5) it is added in stirred tank, 100 DEG C of heating stirrings
It is filtered after 2-4h, obtains filter cake；
2) in filter cake and deionized water quality ratio 1:(3-6) ratio, be added deionized water in a stirring kettle, 100 DEG C plus
It is filtered after thermal agitation 2-4h, the filter cake that obtains that treated；
3) treated filter cake is cleaned with pure boiling water；
4) filter cake after cleaning dries 5h in 100-120 DEG C of oven, obtains 5 microns of refined aluminum hydroxides；
5) by 20 microns of aluminium hydroxides and 40 microns of aluminium hydroxides also according to 1) -4) the step of operate, respectively obtain 20
Micron refined aluminum hydroxide and 40 microns of refined aluminum hydroxides；
Step 2 silane coupling agent hydrophobic treatment refined aluminum hydroxide；
5 microns of refined aluminum hydroxides obtained above and silane coupling agent (preferably methyltrimethoxysilane) are pressed into quality
Than 100:(0.5-1.5), be added in stirred tank (can add micro precipitated silica) simultaneously, 100 DEG C of heating stirring 2-
4h, sealed package is stand-by after cooling, obtains 5 microns of silane treatment refined aluminum hydroxides；By 20 microns of hydrogen-oxygens obtained above
Change aluminium and 40 microns of aluminium hydroxides operate after the same method, 20 microns of silane treatment refined aluminum hydroxides and 40 are made respectively
Micron silane treatment refined aluminum hydroxide；
The production of the high insulating heat-conductive silica gel piece of step 3；
1) in parts by weight, to experiment board material mixing kettle in sequentially add 200-450 parts both-end vinyl silicone oil,
10-20 parts of containing hydrogen silicone oil, 0.1-0.5 parts of acetylenic alcohol inhibitor, 2.5-7.5 parts of platinum catalyst and 3-17 parts of titanate esters
Coupling agent starts to stir, and mixing speed 35-45r/min, high-speed stirred 15-25min is arranged, and then reduces mixing speed to 30-
35r/min starts moderate-speed mixer and vacuumizes 10-25min；
2) after completing above-mentioned steps, in parts by weight, the purification hydrogen-oxygen of 350-600 parts of 5 microns of silane treatments is added
Change aluminium, mixing speed 15-25r/min be set, in stir at low speed 2-3min, then improve mixing speed again to 25-35r/min,
Moderate-speed mixer vacuumizes 10-25min；
3) after completing above-mentioned steps, in parts by weight, the purification hydrogen of 650-1050 parts of 20 microns of silane treatments is added
Aluminium oxide, be arranged mixing speed 15-25r/min, in stir at low speed 2-3min, then improve mixing speed again to 25-35r/
Min, moderate-speed mixer vacuumize 10-25min；
4) after completing above-mentioned steps, in parts by weight, the purification of 300-850 parts of 40 microns of silane treatments is sequentially added
Mixing speed 15-25r/min, middle low speed is arranged in aluminium hydroxide, 40-80 parts of precipitated silica and 0.1-1.5 parts of mill base
2-3min is stirred, then improves mixing speed again to 25-35r/min, moderate-speed mixer vacuumizes 10-25min；
5) after completing above-mentioned steps, mixing speed is reduced to 10-15r/min, Ultra-Low Speed stirring is kept to vacuumize 20-
35min (preferably 30min) carries out scraper；
6) according to product required thickness, discharging is rolled using calender, the product thickness rolled out is 0.3-
3.0mm；
7) product after calendering is carried out by high temperature vulcanized molding using long oven, curing temperature is 120-130 DEG C, when vulcanization
Between be 20-40min；
8) high temperature vulcanized product after molding is cut using guillotine, cuts into the finished product of required specification.
The present invention examines the present invention using the refined aluminum hydroxide of silane coupling agent processing by following contrast test method
The impact of performance of the heat-conducting silica gel sheet of production:
It will be using the heat-conducting silica gel sheet of the refined aluminum hydroxide production of silane coupling agent processing and using untreated hydroxide
The heat-conducting silica gel sheet that aluminum is made is respectively placed in 25 DEG C of temperature and selects 100mm respectively after 90% humidity constant temperature and humidity is handled one month
Long, each 5, two kinds of samples of 100mm wide, 1.0mm thickness compare test, carry out breakdown voltage respectively by ASTM-D149 standard
Test.It is shown through experimental data, using the breakdown potential for the heat-conducting silica gel sheet that the refined aluminum hydroxide that silane coupling agent is handled makes
Pressure is 18-24KV/mm, water absorption rate 0.03-0.07%, using the breakdown potential of the heat-conducting silica gel sheet of untreated aluminium hydroxide production
Pressure is 10-15KV/mm, water absorption rate 0.12-0.18%, it can be seen that, heat-conducting silica gel sheet prepared by the present invention has splendid
Insulating properties and water resistance, be then able to demonstrate that, heat-conducting silica gel sheet prepared by the present invention can still be protected in wet environment
Hold good insulation performance.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of High-Voltage Insulation heat-conducting silica gel sheet, which is characterized in that include both-end vinyl silicone oil 200- by weight
450 parts, 10-20 parts of containing hydrogen silicone oil, 2.5-7.5 parts of platinum catalyst, 0.1-0.5 parts of acetylenic alcohol inhibitor, titanate coupling agent 3-
17 parts, 5 microns 350-600 parts of silane treatment refined aluminum hydroxide, 20 microns 650-1050 parts of silane treatment refined aluminum hydroxide,
40 microns 300-850 parts of silane treatment refined aluminum hydroxide, 40-80 parts of precipitated silica, 0.1-1.5 parts of mill base；
The both-end vinyl silicone oil: matrix resin assigns material most basic performance；
The containing hydrogen silicone oil: it is acted on matrix resin crosslinking curing；
The platinum catalyst: catalysis silicone oil is chemically reacted；
The acetylenic alcohol inhibitor: delay silicon Hydrochemistry reaction carries out, and increases operability；
The titanate coupling agent: increase the binding ability and wetting ability in formula between each component；
5 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and certain anti-flammability are assigned；
20 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and certain anti-flammability are assigned；
40 microns of silane treatment refined aluminum hydroxides: material thermal conductivity, insulating properties and certain anti-flammability are assigned；
The precipitated silica: anti-settling performance, insulating properties and the certain material for assigning material after the completion of stirring are led
It is hot；
The mill base: product colour is assigned.
2. High-Voltage Insulation heat-conducting silica gel sheet according to claim 1, it is characterised in that: the containing hydrogen silicone oil includes side
Containing hydrogen silicone oil or end containing hydrogen silicone oil.
3. High-Voltage Insulation heat-conducting silica gel sheet according to claim 1, it is characterised in that: the both-end vinyl silicone oil
It is replaced by high-vinyl silicone oil.
4. High-Voltage Insulation heat-conducting silica gel sheet according to claim 1, it is characterised in that: the titanate coupling agent by
Silane coupling agent replaces.
5. High-Voltage Insulation heat-conducting silica gel sheet according to claim 1, it is characterised in that: the acetylenic alcohol inhibitor is by horse
Carry out the replacement of anhydride inhibitor.
6. a kind of preparation method of High-Voltage Insulation heat-conducting silica gel sheet, which comprises the following steps:
The refinement treatment of step 1 aluminium hydroxide；
1) by 5 microns of aluminium hydroxides and deionized water, in mass ratio 1:(2-5) it is added in stirred tank, 100 DEG C of heating stirring 2-4h
After filter, obtain filter cake；
2) in filter cake and deionized water quality ratio 1:(3-6) ratio, deionized water is added in a stirring kettle, 100 DEG C of heating are stirred
It is filtered after mixing 2-4h, the filter cake that obtains that treated；
3) treated filter cake is cleaned with pure boiling water；
4) filter cake after cleaning dries 5h in 100-120 DEG C of oven, obtains 5 microns of refined aluminum hydroxides；
5) by 20 microns of aluminium hydroxides and 40 microns of aluminium hydroxides also according to above-mentioned 1) -4) the step of operate, respectively obtain 20
Micron refined aluminum hydroxide and 40 microns of refined aluminum hydroxides；
Step 2 silane coupling agent hydrophobic treatment refined aluminum hydroxide；
By 5 microns of refined aluminum hydroxides obtained above and silane coupling agent 100:(0.5-1.5 in mass ratio), stirred tank is added
In, 100 DEG C of heating stirring 2-4h, sealed package is stand-by after cooling, obtains 5 microns of silane treatment refined aluminum hydroxides；It will be upper
It states 20 microns of aluminium hydroxides obtained and 40 microns of aluminium hydroxides operates after the same method, be made at 20 microns of silane respectively
Manage refined aluminum hydroxide and 40 microns of silane treatment refined aluminum hydroxides；
The production of the high insulating heat-conductive silica gel piece of step 3；
1) 200-450 parts of both-end vinyl silicone oil, 10-20 in parts by weight, are sequentially added into experiment board material mixing kettle
The containing hydrogen silicone oil, 0.1-0.5 parts of acetylenic alcohol inhibitor, 2.5-7.5 parts of platinum catalyst and the coupling of 3-17 parts of titanate esters of part
Mixing speed 35-45r/min, high-speed stirred 15-25min is arranged in agent, then reduces mixing speed to 30-35r/min, takes out true
Empty 10-25min；
2) after completing above-mentioned steps, in parts by weight, the refined aluminum hydroxide of 350-600 parts of 5 microns of silane treatments is added,
Be arranged mixing speed 15-25r/min, in stir at low speed 2-3min, then improve mixing speed again to 25-35r/min, vacuumize
10-25min；
3) after completing above-mentioned steps, in parts by weight, the purification hydroxide of 650-1050 parts of 20 microns of silane treatments is added
Mixing speed 15-25r/min is arranged in aluminium, in stir at low speed 2-3min, then improve mixing speed again to 25-35r/min, take out
Vacuum 10-25min；
4) after completing above-mentioned steps, in parts by weight, the purification hydrogen-oxygen of 300-850 parts of 40 microns of silane treatments is sequentially added
Change aluminium, 40-80 part of precipitated silica and 0.1-1.5 parts of mill base, setting mixing speed 15-25r/min, in stir at low speed
Then 2-3min improves mixing speed to 25-35r/min again, vacuumizes 10-25min；
5) after completing above-mentioned steps, scraper is carried out, reduces mixing speed to 10-15r/min, holding vacuumizes 20-35min；
6) according to product required thickness, discharging is rolled using calender；
7) product after calendering is carried out by high temperature vulcanized molding using long oven；
8) high temperature vulcanized product after molding is cut using guillotine, cuts into the finished product of required specification.
7. the preparation method of High-Voltage Insulation heat-conducting silica gel sheet according to claim 6, it is characterised in that: in step 2, institute
The silane coupling agent used is methyltrimethoxysilane.
8. the preparation method of High-Voltage Insulation heat-conducting silica gel sheet according to claim 6, it is characterised in that: the 5 of step 3)
In, being kept for the preferred time of vacuum is 30min.
9. the preparation method of High-Voltage Insulation heat-conducting silica gel sheet according to claim 6, it is characterised in that: the 6 of step 3)
In, the product thickness rolled out is 0.3-3.0mm.
10. the preparation method of High-Voltage Insulation heat-conducting silica gel sheet according to claim 6, it is characterised in that: the 7 of step 3)
In, curing temperature is 120-130 DEG C, vulcanization time 20-40min.
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| CN110317581A (en) * | 2019-06-06 | 2019-10-11 | 东莞市盛元新材料科技有限公司 | A kind of pureed thermostable heat-conductive composite material and preparation method |
| CN111378284A (en) * | 2020-04-20 | 2020-07-07 | 苏州天脉导热科技股份有限公司 | Low-dielectric-constant heat-conducting silica gel sheet and preparation method thereof |
| WO2021184149A1 (en) * | 2020-03-16 | 2021-09-23 | Dow Silicones Corporation | Thermal conductive silicone composition |
| CN114752221A (en) * | 2022-03-28 | 2022-07-15 | 厦门艾贝森电子有限公司 | Insulating high-heat-conductivity flexible silica gel gasket and preparation method thereof |
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| CN110317581A (en) * | 2019-06-06 | 2019-10-11 | 东莞市盛元新材料科技有限公司 | A kind of pureed thermostable heat-conductive composite material and preparation method |
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| CN114752221A (en) * | 2022-03-28 | 2022-07-15 | 厦门艾贝森电子有限公司 | Insulating high-heat-conductivity flexible silica gel gasket and preparation method thereof |
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