CN113429929A - High-transparency liquid silicone rubber and preparation method thereof - Google Patents
High-transparency liquid silicone rubber and preparation method thereof Download PDFInfo
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- CN113429929A CN113429929A CN202110762925.XA CN202110762925A CN113429929A CN 113429929 A CN113429929 A CN 113429929A CN 202110762925 A CN202110762925 A CN 202110762925A CN 113429929 A CN113429929 A CN 113429929A
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 41
- 239000004944 Liquid Silicone Rubber Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 229920002545 silicone oil Polymers 0.000 claims abstract description 27
- 239000004964 aerogel Substances 0.000 claims abstract description 23
- 238000011049 filling Methods 0.000 claims abstract description 22
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 21
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 21
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010703 silicon Substances 0.000 claims abstract description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract 3
- 239000000843 powder Substances 0.000 claims description 29
- 239000003054 catalyst Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 125000001165 hydrophobic group Chemical group 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 238000004382 potting Methods 0.000 abstract description 9
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 2
- 238000004898 kneading Methods 0.000 description 34
- 239000012780 transparent material Substances 0.000 description 12
- 238000002834 transmittance Methods 0.000 description 8
- 238000011056 performance test Methods 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- 239000006229 carbon black Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229910021485 fumed silica Inorganic materials 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013086 organic photovoltaic Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on 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; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
- H01L23/295—Organic, e.g. plastic containing a filler
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
- H01L23/296—Organo-silicon compounds
-
- 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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
Abstract
The invention relates to the field of silicon rubber, and provides a high-transparency liquid silicon rubber and a preparation method thereof, wherein the formula of the high-transparency liquid silicon rubber comprises a component A and a component B, wherein the component A comprises 100 parts of vinyl silicone oil and 1-15 parts of aerogel; the component B comprises 5-10 parts of vinyl silicone oil, 1-10 parts of hydrogen-containing silicone oil, 1-10 parts of an organic silicon tackifier and 1-10 parts of other additives; the component A and the component B are mixed according to the proportion of 10: 1-10: 5, mixing in proportion; the prepared high-transparency liquid silicone rubber has the characteristics of good adhesion, aging resistance, insulation and high transparency, is low in viscosity and good in fluidity, and is suitable for filling and sealing precise and fine parts; the LED high-power LED potting adhesive can be used for potting a high-power street lamp power supply, an LED electronic display screen, an LED electronic potting adhesive, a circuit board, an LED, an LCD high-power lamp, a mobile phone, an ultrathin computer, a game machine, a digital camera, a solar panel and the like.
Description
Technical Field
The invention relates to the field of silicone rubber, and particularly relates to high-transparency liquid silicone rubber and a preparation method thereof.
Background
Liquid silicone rubber is widely used in the field of consumer electronics products due to its inherent excellent waterproof properties, excellent elasticity, aging resistance, biocompatibility, high production efficiency, and the like, and can realize the manufacture of products with complex shapes. With the continuous upgrading of the functions and performances of products and the increasing requirements of consumers on the quality of appearance, hand feeling, experience and the like, the requirements of consumer electronic products on the performance and processing convenience of materials are also increased. The demand for liquid silicone rubber products is constantly increasing. Flexible electronic components such as OLEDs, OPVs and other high performance products need to be packaged and protected by materials with good weather resistance, good insulation and high light transmittance, so that the packaged electronic components are clearly visible and convenient to use and detect.
The main fillers of the existing liquid silicone rubber are white carbon black, hollow glass beads, silicone resin and the like. However, the white carbon black has the defects of more surface silicon hydroxyl groups, easy product structurization, low product transparency, short product storage period and the like; and the hydrophobic modification degree of the white carbon black can not reach the complete hydrophobicity. At present, the high-transparency liquid silicone rubber is prepared by using silicone resin as a filler, but the prepared liquid silicone rubber has poor mechanical properties, and bonding points are easy to fall off to cause damage to components.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the high-transparency liquid silicone rubber which has the characteristics of good adhesion, aging resistance, insulation and high transparency, has low viscosity and good fluidity, and is suitable for encapsulating precise and fine parts; the LED high-power LED potting adhesive can be used for potting a high-power street lamp power supply, an LED electronic display screen, an LED electronic potting adhesive, a circuit board, an LED, an LCD high-power lamp, a mobile phone, an ultrathin computer, a game machine, a digital camera, a solar panel and the like.
In order to solve the problems, the invention is realized by the following technical scheme:
the formula of the high-transparency liquid silicone rubber comprises a component A and a component B, wherein the component A comprises 100 parts of vinyl silicone oil and 1-15 parts of aerogel; the component B comprises 5-10 parts of vinyl silicone oil, 1-10 parts of hydrogen-containing silicone oil, 1-10 parts of an organic silicon tackifier and 1-10 parts of other additives; the component A and the component B are mixed according to the proportion of 10: 1-10: 5, mixing.
The aerogel is silicon aerogel powder with modified hydrophobic groups; wherein the modified group is one or more of a vinyl hydrophobic group, a methoxy silane hydrophobic group, a glycidoxy silane hydrophobic group and the like.
The preparation method of the high-transparency liquid silicone rubber comprises the following steps:
1) adding the raw materials of the component A into a kneader, stirring for 1-2 hours at room temperature, and vacuumizing for 5-12 hours at 80-160 ℃ to obtain a base material; the catalyst is added.
2) Fully stirring the component B for 10-60 minutes;
3) uniformly mixing the products obtained in the step 1) and the step 2) respectively, and performing vacuum defoaming for 15-60 minutes to obtain the high-transparency liquid silicone rubber.
Specifically, the vacuum in the step 1) and the step 3) is the reaction condition of vacuum degree of minus 0.08MPa to minus 0.1 MPa.
Specifically, the aerogel powder is added in batches according to production while stirring at room temperature in the step 1).
Specifically, the temperature of the evacuation in step 1) is preferably 120 ℃ to 140 ℃.
Specifically, the catalyst is a platinum catalyst.
The invention also provides a potting method for the liquid silicone rubber of the electronic component, which is characterized in that any one of the high-transparency liquid silicone rubbers is used for potting the electronic component in the forms of injection, potting and coating and is cured at room temperature or by heating. Curing is affected by temperature and thickness, and heat curing can be considered when applying thicker thicknesses.
The invention also provides an electronic component, which partially comprises any one of the high-transparency liquid silicone rubber.
The invention has the beneficial effects that:
according to the invention, the silicon aerogel powder with the modified hydrophobic groups is used as a filler, so that the cross-linking points of the system are increased, and the mechanical properties of the product are improved. By adding the powder in batches, the dispersion of the powder is facilitated, and the transparency and the processing performance of the system are improved. By controlling proper temperature, the yellowing risk of the product is reduced, the vacuum degree and the vacuum time are controlled, air bubbles are reasonably discharged, and the scorching risk of the product is reduced. Compared with the traditional liquid silicone rubber taking vinyl silicone resin as a filler, the liquid silicone rubber prepared from aerogel powder has greatly improved mechanical properties and is suitable for more fields. The prepared liquid silicone rubber has the bonding strength with various base materials such as glass, PE, epoxy resin and the like of more than 3.5kN/m, the light transmittance is more than 97 percent, the haze is less than 2 percent, the tensile strength is more than 7MPa, the tear strength is more than 10KN/m, and the elongation is more than 300 percent. The aerogel powder is used as a filler, the existing process and newly added equipment are not required to be changed, and the acceptability of manufacturers is high.
Detailed Description
The technical solution of the present invention is further elaborated below with reference to the embodiments.
Example 1
Adding 100 parts of vinyl silicone oil into a kneading machine, adding 2 parts of aerogel powder, kneading for 30min to obtain a transparent and uniform system, continuously adding 1 part of aerogel powder, heating to 80-120 ℃, after the powder is uniform, vacuumizing, carrying out heat preservation and kneading for 5h, cooling, adding a catalyst, after the uniform kneading, obtaining a transparent material, and filling to obtain a component A.
And (3) adding 5 parts of vinyl silicone oil, 20 parts of hydrogen-containing silicone oil, 2 parts of an organic silicon tackifier and 2 parts of other additives into a kneader, kneading at room temperature for 20min, and filling to obtain a component B.
According to the component A: and (3) stirring the component B at the ratio of 5:1 for 30min, vacuumizing and discharging 25mim in the process to obtain a uniform transparent material without mechanical impurities, and filling to obtain the high-transparency liquid silicone rubber. After injection molding, the product is subjected to performance test, and the light transmittance is 98%, the haze is 1%, the tensile strength is 7.5MPa, the tear strength is 11KN/m, and the elongation is 350%.
Example 2
Adding 100 parts of vinyl silicone oil into a kneading machine, adding 4 parts of aerogel powder, kneading for 50min, adding 3 parts of aerogel powder, kneading for 30min to obtain a transparent and uniform system, continuously adding 1 part of aerogel powder, heating to 80-120 ℃, after the powder is uniform, vacuumizing, carrying out heat preservation and kneading for 7h, cooling, adding a catalyst, after the uniform kneading, obtaining a transparent material, and filling to obtain the component A.
And (3) adding 5 parts of vinyl silicone oil, 20 parts of hydrogen-containing silicone oil, 2 parts of an organic silicon tackifier and 3 parts of other additives into a kneader, kneading at room temperature for 30min, and filling to obtain a component B.
According to the component A: and (3) stirring the component B at the ratio of 5:1 for 40min, vacuumizing and discharging bubbles for 35min to obtain a uniform and transparent material without mechanical impurities, and filling to obtain the high-transparency liquid silicone rubber. After injection molding, the product is subjected to performance test, and the light transmittance is 99%, the haze is 1%, the tensile strength is 9.1MPa, the tear strength is 16KN/m, and the elongation is 325%.
Example 3
Adding 100 parts of vinyl silicone oil into a kneading machine, adding 3 parts of aerogel powder, kneading for 50min, adding 2 parts of aerogel powder, kneading for 30min to obtain a transparent and uniform system, continuously adding 1 part of aerogel powder, heating to 80-120 ℃, after the powder is uniform, vacuumizing, carrying out heat preservation and kneading for 7h, cooling, adding a catalyst, after the uniform kneading, obtaining a transparent material, and filling to obtain a component A.
And (3) adding 6 parts of vinyl silicone oil, 30 parts of hydrogen-containing silicone oil, 2 parts of an organic silicon tackifier and 3 parts of other additives into a kneader, kneading at room temperature for 30min, and filling to obtain a component B.
According to the component A: and (3) stirring the component B at a ratio of 4:1 for 40min, vacuumizing and discharging 35 mm in the process to obtain a uniform and transparent material without mechanical impurities, and filling to obtain the high-transparency liquid silicone rubber. After injection molding, the product is subjected to performance test, and the light transmittance is 99%, the haze is 1%, the tensile strength is 8.5MPa, the tear strength is 12KN/m, and the elongation is 370%.
Example 4
Adding 100 parts of vinyl silicone oil into a kneading machine, adding 3 parts of aerogel powder, kneading for 50min, adding 2 parts of aerogel powder, kneading for 30min to obtain a transparent and uniform system, continuously adding 1 part of aerogel powder, heating to 80-120 ℃, after the powder is uniform, vacuumizing, carrying out heat preservation and kneading for 7h, cooling, adding a catalyst, after the uniform kneading, obtaining a transparent material, and filling to obtain a component A.
And (3) adding 5 parts of vinyl silicone oil, 30 parts of hydrogen-containing silicone oil, 2 parts of an organic silicon tackifier and 3 parts of other additives into a kneader, kneading at room temperature for 30min, and filling to obtain a component B.
According to the component A: and (3) stirring the component B at a ratio of 5:3 for 50min, vacuumizing for 45 mm in the period to obtain a uniform transparent material without mechanical impurities, and filling to obtain the high-transparency liquid silicone rubber. After injection molding, the product is subjected to performance test, and the light transmittance is 98%, the haze is 1%, the tensile strength is 7.2MPa, the tear strength is 8KN/m, and the elongation is 310%.
Comparative example 1
Adding 100 parts of vinyl silicone oil into a kneading machine, adding 6 parts of organic silicon resin, kneading for 30min to obtain a transparent and uniform system, heating to 80-120 ℃, after the powder is uniform, vacuumizing, keeping the temperature, kneading for 7h, cooling, adding a catalyst, uniformly kneading, then obtaining a transparent material, and filling to obtain the component A.
And (3) adding 5 parts of vinyl silicone oil, 30 parts of hydrogen-containing silicone oil, 2 parts of an organic silicon tackifier and 3 parts of other additives into a kneader, kneading at room temperature for 30min, and filling to obtain a component B.
According to the component A: and (3) stirring the component B at the ratio of 5:1 for 30min, vacuumizing for 25mim in the process to obtain a uniform transparent material without mechanical impurities, and filling to obtain the high-transparency liquid silicone rubber. After injection molding, the product is subjected to performance test, and the light transmittance is 98%, the haze is 1%, the tensile strength is 3.5MPa, the tear strength is 3KN/m, and the elongation is 250%.
Comparative example 2
Adding 100 parts of vinyl silicone oil into a kneading machine, adding 3 parts of fumed silica powder, kneading for 50min, adding 2 parts of fumed silica powder, kneading for 30min to obtain a transparent and uniform system, continuously adding 1 part of fumed silica powder, heating to 80-120 ℃, after the powder is uniform, vacuumizing, carrying out heat preservation kneading for 7h, cooling, adding a catalyst, kneading uniformly, and then carrying out transparent material filling to obtain the component A.
And (3) adding 5 parts of vinyl silicone oil, 30 parts of hydrogen-containing silicone oil, 2 parts of an organic silicon tackifier and 3 parts of other additives into a kneader, kneading at room temperature for 30min, and filling to obtain a component B.
According to the component A: and (3) stirring the component B at the ratio of 5:1 for 30min, vacuumizing for 25mim in the process to obtain a uniform transparent material without mechanical impurities, and filling to obtain the high-transparency liquid silicone rubber. After injection molding, the product is subjected to performance test, and the light transmittance is 92%, the haze is 4%, the tensile strength is 7.2MPa, the tear strength is 8.5KN/m, and the elongation is 370%.
The silicone rubbers prepared in examples 1 to 4 and comparative examples 1 to 2 were subjected to performance tests as shown in Table 1.
Claims (9)
1. A high-transparency liquid silicone rubber is characterized in that: the formula comprises a component A and a component B, wherein the component A comprises 100 parts of vinyl silicone oil and 1-15 parts of aerogel; the component B comprises 5-10 parts of vinyl silicone oil, 1-10 parts of hydrogen-containing silicone oil, 1-10 parts of an organic silicon tackifier and 1-10 parts of other additives; the component A and the component B are mixed according to the proportion of 10: 1-10: 5, mixing.
2. The highly transparent liquid silicone rubber according to claim 1, wherein: the aerogel is silicon aerogel powder with modified hydrophobic groups; wherein the modified group is one or more of a vinyl hydrophobic group, a methoxy silane hydrophobic group, a glycidoxy silane hydrophobic group and the like.
3. A method for preparing the highly transparent liquid silicone rubber according to claim 1, characterized in that:
1) adding the raw materials of the component A into a kneader, stirring for 1-2 hours at room temperature, and vacuumizing for 5-12 hours at 80-160 ℃ to obtain a base material; the catalyst is added.
2) Fully stirring the component B for 10-60 minutes;
3) uniformly mixing the products obtained in the step 1) and the step 2) respectively, and performing vacuum defoaming for 15-60 minutes to obtain the high-transparency liquid silicone rubber.
4. The method for producing a highly transparent liquid silicone rubber according to claim 3, characterized in that: the vacuum in the step 1) and the step 3) is the reaction condition of vacuum degree of minus 0.08MPa to minus 0.1 MPa.
5. The method for producing a highly transparent liquid silicone rubber according to claim 3, characterized in that: stirring at room temperature in the step 1), and adding aerogel powder in batches according to production.
6. The method for producing a highly transparent liquid silicone rubber according to claim 3, characterized in that: the temperature of the vacuum pumping in the step 1) is preferably 120-140 ℃.
7. The method for producing a highly transparent liquid silicone rubber according to claim 3, characterized in that: the catalyst is a platinum catalyst.
8. A filling and sealing method for liquid silicone rubber of electronic components, which is characterized in that the high-transparency liquid silicone rubber of any claim 1-2 is used for filling and sealing the electronic components in the forms of injection, filling and coating, and is cured at room temperature or by heating.
9. An electronic component, which partially comprises the highly transparent liquid silicone rubber as claimed in any one of claims 1 to 2.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113698913A (en) * | 2021-10-15 | 2021-11-26 | 东莞天绘新材料有限公司 | Matte silicone rubber for silk screen printing and preparation method thereof |
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|---|---|---|---|---|
| CN113698913A (en) * | 2021-10-15 | 2021-11-26 | 东莞天绘新材料有限公司 | Matte silicone rubber for silk screen printing and preparation method thereof |
| CN113698913B (en) * | 2021-10-15 | 2022-05-20 | 东莞天绘新材料有限公司 | Matte silicone rubber for silk screen printing and preparation method thereof |
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