CN104987837A - LED (light-emitting diode) lamp glass lamp shell heat-conducting and explosion-proof coating material and preparation method thereof - Google Patents
LED (light-emitting diode) lamp glass lamp shell heat-conducting and explosion-proof coating material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an LED (light-emitting diode) lamp glass lamp shell heat-conducting and explosion-proof coating material and a preparation method thereof. The coating material is prepared from a component A and a component B, wherein the component A is prepared from modified graphene, vinyl base silicone oil and a catalyst; the component B is prepared from vinyl base silicone oil, vinyl base silicone resin, hydrogen-containing silicone oil, an inhibitor and a tackifier. The heat-conducting and explosion-proof coating material provided by the invention can be used for coating the surface of an LED lamp glass lamp shell, a layer of protection film is formed after curing, and cracking after the glass lamp shell falls off is prevented, so that the phenomenon that a non-insulated electrified part or an internal connecting wire can be contacted, or mechanical insulation of internal parts of equipment is damaged is avoided.
Description
Technical field
The present invention relates to organosilicon polymer field, particularly relate to a kind of LED glass lamp housing heat conduction explosion-proof coating material and preparation method thereof.
Background technology
LED illumination has the advantages that volume is little, brightness is high, energy consumption is low, is expected to replace incandescent light luminescent lamp, becomes the interior lighting light source of main flow.
The lampshade material of LED is mainly based on plastic and glass, and particularly in recent years popular LED silk lamp, profile, close to incandescent light, all adopts glass shell.When falling, glass shell is easy to explosion, and be scattered glass fragment, and nonisulated band electrical accessory or back panel wiring by human body touch, can exist potential safety hazard.In addition, according to UL1993 authentication requesting, light fixture drops into hardwood plate from the height of 0.91m, and internally charged part will keep being touched.So undressed muffle all can not meet this requirement.
For this reason, some high molecular explosion-proof coatings are applied on LED glass lamp housing, and after light fixture can be made to fall, even if glass fragmentation also can not be scattering on the ground, and cover surface there will not be leak, it also avoid the danger of electric shock.
But thermal diffusivity is the problem that LED needs to solve for a long time, glass ball bulb applies the bad polymeric membrane of one deck thermal conductivity again, can increase thermal resistance further, improves filament temperature, shortens burn-out life always.
Chinese patent publication No. 104359081A describes the explosion proof applications of a kind of solvent-borne type electronics coating adhesive on glass ball bulb lamp, but is not described thermal conductivity, and volatile solvent has the potentially dangerouss such as inflammable, bio-toxicity.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art; the LED silk lamp explosion-proof coating material of a kind of heat conductivility, mechanical property, excellent in optical properties is provided; can not burst when falling by protective glass lampshade, and less on the heat radiation impact of light fixture.
In order to solve the problems of the technologies described above, technical scheme provided by the invention is a kind of LED glass lamp housing heat conduction explosion-proof coating material.The technical scheme adopted is as follows: a kind of LED glass lamp housing heat conduction explosion-proof coating material, comprises component A and the B component of 1:1 mixing in mass ratio; Described component A comprises: modified graphene 0.1-0.5 weight part, vinyl silicone oil 100 weight part, catalyzer 0.2-0.5 weight part; Described B component comprises: vinyl silicone oil 60-80 weight part, vinyl polysiloxane 10-30 weight part, containing hydrogen silicone oil 3-10 weight part, inhibitor 0.01 weight part, tackifier 2 weight part.
Further, described modified graphene, its preparation method is: joined by the graphene oxide of 1 weight part in the DMF of 10 weight parts, after ultrasonic disperse is even, spraying adds the silane coupling agent of 1 weight part, stirs, is warmed up to 110 DEG C-130 DEG C, reaction 4-8 hour, be cooled to room temperature (25 DEG C), reaction product through methyl alcohol centrifuge washing repeatedly after, vacuum-drying can obtain modified graphene.
Further, described silane coupling agent is the one in vinyltrimethoxy silane, γ-glycidyl ether oxygen propyl trimethoxy silicane (KH-560), γ-methacryloxypropyl trimethoxy silane (KH-570) etc.
Further, vinyl silicone oil used is the linear polymethyl siloxane that two ends contain vinyl-functional, and vinyl mass percent is 0.1% to 0.25%, and viscosity is 5000cs to 1000cs.
Further, used catalyst is the one in the platinum complex of the aqueous isopropanol of Platinic chloride, methyl vinyl silicone coordination, and platinum content is 2000ppm-5000ppm.
Further, vinyl polysiloxane used is Vinyl MQ silicon resin, and M/Q ratio is 0.6-0.9, and vinyl mass percent is 0.8%-1.3%, and solid content is 60%-74%.
Further, containing hydrogen silicone oil used is the linear methyl containing hydrogen silicone oil containing two or more hydrogen in molecular chain, and hydrogen mass percent is 0.25%-0.75%
Further, inhibitor used is 1-ethynylcyclohexanol, 3-methyl isophthalic acid-butine-3-alcohol, one or more mixtures formed according to any proportioning in 3-octyl group-ethyl acetylene-3-alcohol.
Further, tackifier used are liquid silastic tackifier, and refractive index is identical with vinyl silicone oil.
A kind of preparation method of LED glass lamp housing heat conduction explosion-proof coating material is as follows:
Prepared by component A: joined by the modified graphene of 0.1-0.5 weight part in the toluene of 10 weight parts, and ultrasonic disperse is even, then adds the methyl vinyl silicon oil of 100 weight parts, puts into vacuum defoamation machine and mix; The toluene in solution sloughed by use rotatory evaporator, obtains mixture; In mixture, add the catalyzer of 0.2-0.5 weight part, mix, make component A;
Prepared by B component: by the vinyl silicone oil of 60-80 weight part, the vinyl polysiloxane of 10-30 weight part, the containing hydrogen silicone oil of 3-10 weight part, the inhibitor of 0.01 weight part, the tackifier of 2 weight parts mix, and make B component.
During use, A and B component are mixed according to quality 1:1, vacuum defoamation, then even application is on LED glass lamp housing surface, 50 DEG C of solidification 1h.
The invention has the beneficial effects as follows:
1. the present invention has prepared a kind of LED glass lamp housing heat conduction explosion-proof coating material, good cementability is had to glass, LED glass ball bulb surface can be coated in, make it drop into after hard template from the height of 91cm not burst, thus avoid nonisulated band electrical accessory or back panel wiring to be touched or to destroy the mechanical insulated of device interior part, and avoid glass fragment to damage people, reduce potential safety hazard to greatest extent.
2. the present invention with the addition of the grapheme material through modification in liquid silicon rubber composition, hydrophobically modified Graphene and silicone rubber based compatability good, be uniformly dispersed, transmittance is good, 1mm thick product transmittance in 450nm place can reach more than 98%, thus effectively ensures the light emission rate of LED.
3. the adding of modified graphene, make the thermal conductivity of product bring up to 0.3W/mK from 0.16W/mK, thus there is certain thermal conductivity, LED can be conducted and produce heat, increase the work-ing life of LED, be conducive to improving LED lamplight flux sustainment rate.
4. the present invention is not containing volatile solvent, safety, environment-protective no-smell.
Embodiment
Be further described in detail the present invention below in conjunction with concrete embodiment, the example provided is only elaboration the present invention, instead of in order to limit the scope of the invention.
embodiment 1
A preparation method for LED glass lamp housing heat conduction explosion-proof coating material, comprises the steps
Prepare modified graphene: joined by 1 part of graphene oxide in 10 parts of DMFs, after ultrasonic disperse is even, adds 1 part of KH-570, stir, be warmed up to 110 DEG C, react 8 hours.Reaction product, after methyl alcohol centrifuge washing four times, can obtain modified graphene 50 DEG C of vacuum-dryings.
Preparation component A: joined by 0.2 part of modified graphene in 10 parts of toluene, ultrasonic disperse is even, then adds 100 parts of vinyl silicone oils (contents of ethylene 0.15%, viscosity 3000cs), puts into vacuum defoamation machine and mix.The toluene in solution sloughed by use rotatory evaporator, obtains mixture.Add the chloroplatinic acid catalyst of 0.3 part of 3000ppm, mix, make component A.
Preparation B component: by 73 parts of vinyl silicone oil (contents of ethylene 0.15%, viscosity 3000cs), 20 parts of vinyl polysiloxanes (contents of ethylene 0.8%, viscosity 7000cs, M/Q ratio is 0.7, solid content 68%), 5 parts of containing hydrogen silicone oils (hydrogen content 0.5%), 0.01 part of 1-ethynylcyclohexanol, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
embodiment 2
A preparation method for LED glass lamp housing heat conduction explosion-proof coating material, comprises the steps
Prepare modified graphene: joined by 1 part of graphene oxide in 10 parts of DMFs, after ultrasonic disperse is even, adds 1 part of vinyltrimethoxy silane, stir, be warmed up to 130 DEG C, react 4 hours.Reaction product, after methyl alcohol centrifuge washing four times, can obtain modified graphene 50 DEG C of vacuum-dryings.
Preparation component A: joined by 0.4 part of modified graphene in 10 parts of toluene, ultrasonic disperse is even, then adds 100 parts of methyl vinyl silicon oils (contents of ethylene 0.25%, viscosity 1000cs), puts into vacuum defoamation machine and mix.The toluene in solution sloughed by use rotatory evaporator, obtains mixture.Add the chloroplatinic acid catalyst of 0.5 part of 2000ppm, mix, make component A.
Preparation B component: by 72 parts of vinyl silicone oil (contents of ethylene 0.25%, viscosity 1000cs), 16 parts of vinyl polysiloxanes (contents of ethylene 1.1%, viscosity 6000cs, MQ ratios 0.6, solid content 60%), 10 parts of containing hydrogen silicone oils (hydrogen content 0.25%), 0.01 part of 3-methyl isophthalic acid-butine-3-alcohol, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
embodiment 3
A preparation method for LED glass lamp housing heat conduction explosion-proof coating material, comprises the steps
Prepare modified graphene: joined by 1 part of graphene oxide in 10 parts of DMFs, after ultrasonic disperse is even, adds 1 part of KH-560, stir, be warmed up to 110 DEG C, react 8 hours.Reaction product, after methyl alcohol centrifuge washing four times, can obtain modified graphene 50 DEG C of vacuum-dryings.
Preparation component A: joined by 0.2 part of modified graphene in 10 parts of toluene, ultrasonic disperse is even, then adds 100 parts of methyl vinyl silicon oils (contents of ethylene 0.1%, viscosity 5000cs), puts into vacuum defoamation machine and mix.The toluene in solution sloughed by use rotatory evaporator, obtains mixture.Add the platinum complex catalyst of the methyl vinyl silicone coordination of 0.1 part of 5000ppm, mix, make component A.
Preparation B component: by 65 parts of vinyl silicone oil (contents of ethylene 0.1%, viscosity 5000cs), 30 parts of vinyl polysiloxanes (contents of ethylene 1.3%, viscosity 8000cs, MQ ratios 0.9, solid content 74%), 3 parts of containing hydrogen silicone oils (hydrogen content 0.75%), 0.01 part of 3-octyl group-ethyl acetylene-3-alcohol, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
embodiment 4
A preparation method for LED glass lamp housing heat conduction explosion-proof coating material, comprises the steps
Prepare modified graphene: joined by 1 part of graphene oxide in 10 parts of DMFs, after ultrasonic disperse is even, adds 1 part of KH-570, stir, be warmed up to 120 DEG C, react 6 hours.Reaction product, after methyl alcohol centrifuge washing four times, can obtain modified graphene 50 DEG C of vacuum-dryings.
Preparation component A: joined by 0.1 part of modified graphene in 10 parts of toluene, ultrasonic disperse is even, then adds 100 parts of methyl vinyl silicon oils (contents of ethylene 0.15%, viscosity 3000cs), puts into vacuum defoamation machine and mix.The toluene in solution sloughed by use rotatory evaporator, obtains mixture.Add the platinum complex catalyst of the methyl vinyl silicone coordination of 0.3 part of 3000ppm, mix, make component A.
Preparation B component: by 80 parts of vinyl silicone oil (contents of ethylene 0.15%, viscosity 3000cs), 10 parts of vinyl polysiloxanes (contents of ethylene 0.8%, viscosity 8000cs, MQ ratios 0.7, solid content 68%), 8 parts of containing hydrogen silicone oils (hydrogen content 0.25%), 0.01 part of ethynylcyclohexanol, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
embodiment 5
A preparation method for LED glass lamp housing heat conduction explosion-proof coating material, comprises the steps
Prepare modified graphene: joined by 1 part of graphene oxide in 10 parts of DMFs, after ultrasonic disperse is even, adds 1 part of KH-570, stir, be warmed up to 110 DEG C, react 8 hours.Reaction product, after methyl alcohol centrifuge washing four times, can obtain modified graphene 50 DEG C of vacuum-dryings.
Preparation component A: joined by 0.2 part of modified graphene in 10 parts of toluene, ultrasonic disperse is even, then adds 100 parts of methyl vinyl silicon oils (contents of ethylene 0.15%, viscosity 3000cs), puts into vacuum defoamation machine and mix.The toluene in solution sloughed by use rotatory evaporator, obtains mixture.Add the platinum complex catalyst of the methyl vinyl silicone coordination of 0.3 part of 3000ppm, mix, make component A.
Preparation B component: by 60 parts of vinyl silicone oil (contents of ethylene 0.15%, viscosity 3000cs), 30 parts of vinyl polysiloxanes (contents of ethylene 1.3%, viscosity 8000cs, MQ ratios 0.9, solid content 74%), 8 parts of containing hydrogen silicone oils (hydrogen content 0.5%), 0.01 part of 3-octyl group-ethyl acetylene-3-alcohol, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
comparative example 1
Preparation component A: get 100 parts of vinyl silicone oils (contents of ethylene 0.15%, viscosity 3000cs), add the chloroplatinic acid catalyst of 0.3 part of 3000ppm, mix, make component A.
Preparation B component: by 70 parts of vinyl silicone oil (contents of ethylene 0.15%, viscosity 3000cs), 20 parts of vinyl polysiloxanes (contents of ethylene 1.3%, viscosity 8000cs, MQ ratios 0.9, solid content 74%), 8 parts of containing hydrogen silicone oils (hydrogen content 0.4%), 0.01 part of acetylene hexalin, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
comparative example 2
Preparation component A: joined by 0.1 part of graphene oxide in 10 parts of tetrahydrofuran (THF)s, ultrasonic disperse is even, then adds 100 parts of methyl vinyl silicon oils (contents of ethylene 0.15%, viscosity 3000cs), puts into vacuum defoamation machine and mix.The tetrahydrofuran (THF) in solution sloughed by use rotatory evaporator, obtains mixture.Get 100 parts of mixtures, add the chloroplatinic acid catalyst of 0.3 part of 3000ppm, mix, make component A.
Preparation B component: by 70 parts of vinyl silicone oil (contents of ethylene 0.15%, viscosity 3000cs), 20 parts of vinyl polysiloxanes (contents of ethylene 1.5%, viscosity 8000cs, MQ ratios 0.9, solid content 74%), 8 parts of containing hydrogen silicone oils (hydrogen content 0.4%), 0.01 part of acetylene hexalin, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
comparative example 3
Prepare modified graphene: joined by 1 part of graphene oxide in 10 parts of DMFs, after ultrasonic disperse is even, adds 1 part of silane coupling agent, stir, be warmed up to 110 DEG C, react 8 hours.Reaction product, after methyl alcohol centrifuge washing four times, can obtain modified graphene 50 DEG C of vacuum-dryings.
Preparation component A: joined by 0.1 part of modified graphene in 10 parts of toluene, ultrasonic disperse is even, then adds 100 parts of methyl vinyl silicon oils (contents of ethylene 0.33%, viscosity 800cs), puts into vacuum defoamation machine and mix.The toluene in solution sloughed by use rotatory evaporator, obtains mixture.Add the chloroplatinic acid catalyst of 0.3 part of 3000ppm, mix, make component A.
Preparation B component: by 95 parts of vinyl silicone oils (contents of ethylene 0.33%, viscosity 800cs), 3 parts of containing hydrogen silicone oils (hydrogen content 0.75%), 0.01 part of acetylene hexalin, 2 parts of methyl silicone rubber tackifier mixing, stir final vacuum deaeration, makes B component.
The A of embodiment 1,2,3 and comparative example's 1,2,3, B component are mixed by weight the ratio of 1:1, vacuum defoamation was taken out after 10 minutes.Dip-coating, on commercially available LED silk lamp surface (Foshan illumination 4W LED silk lamp), is solidified 1 hour at 50 DEG C.
Elongation at break and tensile strength test: the rear 50 DEG C of heating of AB component mixing solidification in 1 hour, test according to GB/T 528-2009 sample preparation.
Thermal conductivity test: AB component mixing rear 50 DEG C heating 1 hour solidification, according to ASTM D5470 sample preparation and utilize Conduction Coefficient Detector Basing test thermal conductivity.
Light is logical maintains test: the optical throughput utilizing bulb after integration sphere light source system test processes.After lighting 1000 hours, then test light flux, calculate their ratio.
Drop test is tested: place hardwood plate on the ground, above hardwood plate, there is a platform at 91cm place.Cated bulb is placed on platform, is slowly pushed into edge and makes it to fall on hardwood plate.Check and fall on rear glass lamp housing whether have area more than the leak of 1cm2.If have, do not pass through, then do not pass through.
Table 1 performance index table
| Performance index sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Elongation at break (%) | 180 | 120 | 250 | 200 | 150 | 175 | 150 | 50 |
| Tensile strength (MPa) | 3.2 | 4 | 2.2 | 3 | 3.5 | 3.3 | 3 | 1.2 |
| Thermal conductivity (W/mK) | 0.3 | 0.35 | 0.3 | 0.26 | 0.3 | 0.17 | 0.23 | 0.3 |
| 1000h light is logical maintains (%) | 98.6% | 99.1% | 98.9% | 98.5% | 98.9% | 97.9% | 96% | 98.5% |
| Fall down test | Pass through | Pass through | Pass through | Pass through | Pass through | Pass through | Pass through | Do not pass through |
As shown in Table 1, LED glass lamp housing heat conduction explosion-proof coating material of the present invention, good cementability is had to glass, after being coated in LED glass ball bulb surface, make it drop into after hard template from the height of 91cm not burst, thus avoid nonisulated band electrical accessory or back panel wiring to be touched or to destroy the mechanical insulated of device interior part, and avoid glass fragment to damage people, reduce potential safety hazard to greatest extent.Owing to the addition of the grapheme material through modification in liquid silicon rubber composition, hydrophobically modified Graphene and silicone rubber based compatability good, be uniformly dispersed, transmittance is good, 1mm thick product transmittance in 450nm place can reach more than 98%, thus effectively ensures the light emission rate of LED.Adding of modified graphene, also make the thermal conductivity of product bring up to 0.3W/mK from 0.16W/mK, LED can be conducted and produce heat, increase the work-ing life of LED, be conducive to improving LED lamplight flux sustainment rate.
Claims (10)
1. a LED glass lamp housing heat conduction explosion-proof coating material, is characterized in that: it comprises component A and the B component of 1:1 mixing in mass ratio; Described component A comprises: modified graphene 0.1-0.5 weight part, vinyl silicone oil 100 weight part, catalyzer 0.2-0.5 weight part; Described B component comprises: vinyl silicone oil 60-80 weight part, vinyl polysiloxane 10-30 weight part, containing hydrogen silicone oil 3-10 weight part, inhibitor 0.01 weight part, tackifier 2 weight part.
2. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, it is characterized in that, described modified graphene, its preparation method is: the N graphene oxide of 1 weight part being joined 10 weight parts, in dinethylformamide, after ultrasonic disperse is even, spraying adds the silane coupling agent of 1 weight part, stir, be warmed up to 110 DEG C-130 DEG C, reaction 4-8 hour, is cooled to room temperature (25 DEG C), reaction product through methyl alcohol centrifuge washing repeatedly after, vacuum-drying can obtain modified graphene.
3. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 2, it is characterized in that, described silane coupling agent is the one in vinyltrimethoxy silane, γ-glycidyl ether oxygen propyl trimethoxy silicane (KH-560), γ-methacryloxypropyl trimethoxy silane (KH-570) etc.
4. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, it is characterized in that, vinyl silicone oil used is the linear polymethyl siloxane that two ends contain vinyl-functional, and vinyl mass percent is 0.1% to 0.25%, and viscosity is 5000cs to 1000cs.
5. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, it is characterized in that, used catalyst is the one in the platinum complex of the aqueous isopropanol of Platinic chloride, methyl vinyl silicone coordination, and platinum content can be 2000ppm-5000ppm.
6. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, it is characterized in that, vinyl polysiloxane used is Vinyl MQ silicon resin, and M/Q ratio is 0.6-0.9, vinyl mass percent can be 0.8%-1.3%, and solid content is 60%-74%.
7. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, is characterized in that, containing hydrogen silicone oil used is the linear methyl containing hydrogen silicone oil containing two or more hydrogen in molecular chain, and hydrogen mass percent is 0.25%-0.75%.
8. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, it is characterized in that, inhibitor used is 1-ethynylcyclohexanol, 3-methyl isophthalic acid-butine-3-alcohol, one or more mixtures formed according to any proportioning in 3-octyl group-ethyl acetylene-3-alcohol.
9. a kind of LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, it is characterized in that, tackifier used are liquid silastic tackifier, and refractive index is identical with the refractive index of vinyl silicone oil.
10. a preparation method for LED glass lamp housing heat conduction explosion-proof coating material according to claim 1, it is characterized in that, the method is:
Prepared by component A: joined by the modified graphene of 0.1-0.5 weight part in the toluene of 10 weight parts, and ultrasonic disperse is even, then adds the methyl vinyl silicon oil of 100 weight parts, puts into vacuum defoamation machine and mix; The toluene in solution sloughed by use rotatory evaporator, obtains mixture; In mixture, add the catalyzer of 0.2-0.5 weight part, mix, make component A;
Prepared by B component: by the vinyl silicone oil of 60-80 weight part, the vinyl polysiloxane of 10-30 weight part, the containing hydrogen silicone oil of 3-10 weight part, the inhibitor of 0.01 weight part, and the tackifier of 2 weight parts mix, and make B component;
During use, A and B component are mixed according to quality 1:1, vacuum defoamation, then even application is on LED glass lamp housing surface, 50 DEG C of solidification 1h.
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| CN107556913A (en) * | 2017-09-26 | 2018-01-09 | 信和新材料股份有限公司 | A kind of solvent-free organic silicon high-temperature resistant anti-corrosive paint being modified based on graphene and preparation method thereof |
| CN109439192A (en) * | 2018-10-31 | 2019-03-08 | 宁波市凯迪森照明科技有限公司 | A kind of LDE lamp housing |
| CN110819226A (en) * | 2019-11-19 | 2020-02-21 | 广州信粤新材料科技有限公司 | Anticorrosive wear-resistant organic silicon coating and preparation method thereof |
| CN110819226B (en) * | 2019-11-19 | 2021-08-31 | 广州信粤新材料科技有限公司 | Anticorrosive wear-resistant organic silicon coating and preparation method thereof |
| CN111117479A (en) * | 2019-12-26 | 2020-05-08 | 江西贝特利新材料有限公司 | Special organic silicon explosion-proof protective coating applied to glass material and preparation and use methods thereof |
| CN112358756A (en) * | 2020-10-14 | 2021-02-12 | 航天材料及工艺研究所 | High-strength stain-resistant silicone rubber four-prevention coating and preparation method thereof |
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