CN106928601B - A kind of light aging resisting fluorubber composite material and preparation method and application - Google Patents
A kind of light aging resisting fluorubber composite material and preparation method and application Download PDFInfo
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- CN106928601B CN106928601B CN201710217636.5A CN201710217636A CN106928601B CN 106928601 B CN106928601 B CN 106928601B CN 201710217636 A CN201710217636 A CN 201710217636A CN 106928601 B CN106928601 B CN 106928601B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
Abstract
The invention discloses a kind of light aging resisting fluorubber composite material and preparation method and applications, belong to laser diode field.The light aging resisting fluorubber composite material is prepared using the component of following mass parts: 100 parts of perfluoroether raw rubber, 100nm-2 μm of partial size of SiO23-5 parts of hollow sphere, 2.5-3 parts of vulcanizing agent, 2-3 parts of paraffin, 0.2-0.4 parts of light stabilizer.Light aging resisting fluorubber composite material provided by the invention, using the lesser feature of Measurement of Gas Thermal Conductivity, by the way that SiO is added2Hollow sphere, increase the volume of gas in fluorubber composite material, to reduce the thermal coefficient of fluorubber composite material, improve its thermal resistance, make the fluorubber composite material that there is good heat-proof quality, extend the light aging resisting time that element is made in fluorubber composite material, guarantees the reliability of surrounding other elements work.
Description
Technical field
The present invention relates to laser diode field, in particular to a kind of light aging resisting fluorubber composite material and preparation method
And application.
Background technique
Perfluoroelastomers by tetrafluoroethene, perfluoroalkyl vinyl ether, with the Third monomer of a small amount of band vulcanization point (such as
CF2=CFORf(X is-COOR ,-CN ,-OC to X6F5Deng)) be copolymerized.Only have carbon and fluorine former on perfluoroelastomers main polymer chain
Son, not hydrogen atoms, since the bond energy of C-F key is larger (485kJ/mol), and fluorine atom covalent radius is 0.064nm, close to C-
The half of C bond distance, therefore fluorine atom can be closely arranged in around carbon atom, and C-C main chain is shielded well, be guaranteed
The stability of C-C main chain, to make perfluoroelastomers that there is excellent high temperature resistant, weatherability, inoxidizability, oil resistivity, resistance to
Corrosive nature is widely applied in fields such as space flight, aviation, automobile, petroleum and household electrical appliance.Specifically, perfluoroether
Rubber is generally used for partition, gasket etc. in production precision instrument, the effects of to play sealing, isolation.
Inventor has found that the prior art at least has following technical problem:
Perfluoroelastomers thermal resistance is relatively small, causes its heat-blocking action poor.Element is by light made of perfluoroelastomers
According to the effects of heating after, will affect the reliability of around other elements work.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of good heat-insulation effect, light aging resisting property
Excellent fluorubber composite material and preparation method and application, specific technical solution are as follows:
In a first aspect, the embodiment of the invention provides a kind of light aging resisting fluorubber composite material, the light aging resisting fluorine
Rubber composite material is prepared using the component of following mass parts: 100 parts of perfluoroether raw rubber, 100nm-2 μm of partial size of SiO2
3-5 parts of hollow sphere, 2.5-3 parts of vulcanizing agent, 2-3 parts of paraffin, 0.2-0.4 parts of light stabilizer.
Specifically, preferably, the vulcanizing agent includes the component of following mass parts: 2-2.3 parts of bisphenol AF, benzyl three
0.5-0.7 parts of tetraphenylphosphonium chloride phosphorus.
Specifically, preferably, the light stabilizer is hindered amine light stabilizer.
Second aspect, the embodiment of the invention provides the preparation methods of above-mentioned light aging resisting fluorubber composite material, including
Following steps:
Perfluoroether raw rubber is poured into open mill, after the thin logical 8-15min that plasticates, SiO is added2Hollow sphere, paraffin, light are stablized
Agent is kneaded 15-20min, vulcanizing agent is then added, and one step cure 15-20min is carried out at 155~165 DEG C, then in nitrogen or
Post vulcanization 28-35h is carried out under the protection of inert gas at 230~290 DEG C, obtains the light aging resisting fluorubber composite wood
Material.
Specifically, preferably, the SiO2Hollow sphere is prepared via a method which to obtain:
Step a, melamino-formaldehyde microballoon is prepared
Compound concentration is the formalin of 0.0139-0.0278g/ml, and under 70-80 DEG C of water bath condition, melamine is added
Then formic acid is added in amine, continue to stir 20-50min after reaction solution is muddy, reaction product is washed and dried, institute is obtained
State melamino-formaldehyde microballoon.
Wherein, the molar ratio of the formaldehyde and the melamine is 4.5-9:1.
Step b, SiO is prepared2With melamino-formaldehyde complex microsphere
The melamino-formaldehyde aqueous solution that mass fraction is 3%-5% is prepared with the melamino-formaldehyde microballoon, then,
The melamino-formaldehyde aqueous solution for taking 1 parts by volume, sequentially add 13-18 parts by volume pure water and 45-55 parts by volume it is different
Propyl alcohol adjusts PH to 7-8 and product is filtered drying, obtains the SiO after addition ethyl orthosilicate is stirred to react 4-5h2With three
Melamine-formaldehyde complex microsphere.
Step c, SiO is prepared2Hollow sphere
By the SiO24-5h is calcined at 500-510 DEG C with melamino-formaldehyde complex microsphere, obtains the SiO2It is hollow
Ball.
The third aspect, the embodiment of the invention provides above-mentioned light aging resisting fluorubber composite materials in digital optical processing technique
Application in laser projection device.
Specifically, preferably, isolating frame, the isolating frame edge is made using the light aging resisting fluorubber composite material
Length direction is set on photoconductive tube, and is integrally placed in photoconductive tube metallic support.
Specifically, block partition preferably, being made using the light aging resisting fluorubber composite material, it is described block every
Plate is covered on the top of the epoxy resin in digital micromirror elements.
Specifically, sharp for substituting preferably, rubber baffle is made using the light aging resisting fluorubber composite material
Metal baffle on light galvanometer bracket.
Specifically, it preferably, heat insulating mattress is made using the light aging resisting fluorubber composite material, is covered on and is located
In on the shell for the laser projection device that the light of closed state is irradiated to, for stopping the light.
Technical solution provided in an embodiment of the present invention has the benefit that
Light aging resisting fluorubber composite material provided in an embodiment of the present invention, using the lesser feature of Measurement of Gas Thermal Conductivity,
By the way that SiO is added2Hollow sphere increases the volume of gas in fluorubber composite material, to reduce leading for fluorubber composite material
Hot coefficient improves its thermal resistance, and the fluorubber composite material is made to have good heat-proof quality, extends fluorubber composite material and is made
The light aging resisting time of element guarantees the reliability of surrounding other elements work.Meanwhile by SiO2The partial size of hollow sphere is limited to
100nm-2 μm, such different-grain diameter SiO2Arrangement can be interted between hollow sphere, make greater particle size SiO2Sky between hollow sphere
Gap can be by the SiO compared with small particle2Hollow sphere is filled up, to make SiO2Hollow sphere is distributed more in fluorubber composite material
Uniformly, the gas volume in fluorubber composite material is significantly increased, so that it is superior fast light to have fluorubber composite material
Ageing properties.As it can be seen that light aging resisting fluorubber composite material provided in an embodiment of the present invention, is made by the collaboration between each component
With, obtain good heat insulation and excellent light aging resisting property, and easy to use, be suitable for large-scale promotion application.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the schematic diagram of isolating frame application process provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram provided in an embodiment of the present invention for blocking partition application process；
Fig. 3 is the schematic diagram of rubber baffle application process provided in an embodiment of the present invention；
Fig. 4-1 is the schematic diagram of heat insulating mattress application scenarios provided in an embodiment of the present invention；
Fig. 4-2 is the schematic diagram of heat insulating mattress application scenarios provided in an embodiment of the present invention.
Appended drawing reference respectively indicates:
1 photoconductive tube,
2 photoconductive tube metallic supports,
3 isolating frames,
4 DMD,
5 epoxy resin,
6 block partition,
7 laser galvanometer brackets,
8 rubber baffles,
9 off light,
10 shells,
11 heat insulating mattress.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention will be made into one below
Step ground detailed description.
In a first aspect, the embodiment of the invention provides a kind of light aging resisting fluorubber composite material, the light aging resisting fluorine rubber
Glue composite material includes the component of following mass parts: 100 parts of perfluoroether raw rubber, 100nm-2 μm of partial size of SiO2Hollow sphere 3-5
Part, 2.5-3 parts of vulcanizing agent, 2-3 parts of paraffin, 0.2-0.4 parts of light stabilizer.
Light aging resisting fluorubber composite material provided in an embodiment of the present invention, using the lesser feature of Measurement of Gas Thermal Conductivity,
By the way that SiO is added2Hollow sphere increases the volume of gas in fluorubber composite material, to reduce leading for fluorubber composite material
Hot coefficient improves its thermal resistance, and the fluorubber composite material is made to have good heat-proof quality, extends fluorubber composite material and is made
The light aging resisting time of element guarantees the reliability of surrounding other elements work.Meanwhile by SiO2The partial size of hollow sphere is limited to
100nm-2 μm, such different-grain diameter SiO2Arrangement can be interted between hollow sphere, make greater particle size SiO2Sky between hollow sphere
Gap can be by the SiO compared with small particle2Hollow sphere is filled up, to make SiO2Hollow sphere is distributed more in fluorubber composite material
Uniformly, the gas volume in fluorubber composite material is significantly increased, so that it is superior fast light to have fluorubber composite material
Ageing properties.As it can be seen that light aging resisting fluorubber composite material provided in an embodiment of the present invention, is made by the collaboration between each component
With, obtain good heat insulation and excellent light aging resisting property, and easy to use, be suitable for large-scale promotion application.
Specifically, the perfluoroether raw rubber in light aging resisting fluorubber composite material refers to uncured perfluoroelastomers,
In order to be modified processing to perfluoroelastomers.SiO2The partial size of hollow sphere be 100nm-2 μm, wherein various partial sizes number
It is to be distributed according to statistics rule, so that SiO of different sizes2Hollow sphere can intert arrangement, plug the gap mutually, as far as possible
Increase SiO in fluorubber composite material2The quantity of hollow sphere and the uniformity of distribution have the fluorubber composite material lower
Thermal coefficient and higher thermal resistance, improve its heat-proof quality and light aging resisting property.
Vulcanizing agent is for making the molecule in fluorubber composite material be cross-linked with each other, the webbed structure of shape, to improve fluorine
The intensity of rubber composite material.Specifically, vulcanizing agent includes the component of following mass parts: 2-2.3 parts of bisphenol AF, benzyltriphenyl phosphonium
0.5-0.7 parts of phosphorus chloride.Bisphenol AF be also known as 2,2- it is bis--(4- hydroxyphenyl) hexafluoropropane, be often with benzyltriphenylphosphonium chloride phase
The vulcanizing agent being used cooperatively, for carrying out the sulfidation of fluorubber composite material.
Light stabilizer is able to suppress the degradation of polymer, slows down discoloration, embrittlement, performance decline of rubber product etc., extends
The light aging resisting time of rubber product.Therefore, it is selected in light aging resisting fluorubber composite material provided in an embodiment of the present invention
Light stabilizer, and light stabilizer is preferably high-quality and efficient hindered amine light stabilizer.Hindered amine light stabilizer it is at low cost and
Toxicity is low, good with the compatibility of most polymer, and light stablizing effect is better than the ultraviolet absorber of other classes.Specifically,
Hindered amine light stabilizer can be preferably light stabilizer 944 (No. CAS: 70624-18-9；71878-19-8), light stabilizer
783 (No. CAS: 70198-29-7), light stabilizer 791 (No. CAS: 71878-19-8/70624-18-9) etc..
Second aspect, the embodiment of the invention provides the preparation methods of above-mentioned light aging resisting fluorubber composite material, specifically
The following steps are included:
Perfluoroether raw rubber is poured into open mill, after the thin logical 8-15min that plasticates, SiO is added2Hollow sphere, paraffin, light are stablized
Agent is kneaded 15-20min, vulcanizing agent is then added, and one step cure 15-20min is carried out at 155~165 DEG C, then in nitrogen or
Post vulcanization 28-35h is carried out under the protection of inert gas at 230-290 DEG C, obtains light aging resisting fluorubber composite material.
According in first aspect in light aging resisting fluorubber composite material each raw material ratio, successively according to the method described above,
It adds raw materials into open mill, carries out the preparation of light aging resisting fluorubber composite material.The roll spacing of open mill is set as 0.1-
0.3mm, to enter thin logical technique.Since raw rubber molecular weight is higher, viscosity is larger, is unfavorable for the mixing with other components, therefore,
It needs to squeeze glue by the roller on open mill, shear, to cut the strand of raw rubber, improve the flowing of glue
Property, enhance the plasticity of raw rubber.Meanwhile the distance between roller (i.e. roll spacing) is smaller on open mill, to the shear action of raw rubber
Power is stronger.By carrying out above-mentioned setting, for example, 0.1mm, 0.2mm, 0.3mm etc. to roll spacing, and carry out the thin logical modeling of 8-15min
Refining, such as carry out 8min, 10min, 12min, 15min etc., it can be obtained the perfluoroelastomers suitable for reaction.
Perfluoroether raw rubber it is thin it is logical plasticate after the completion of, sequentially add SiO2Hollow sphere, paraffin, light stabilizer are kneaded 15-
20min, such as be kneaded 15min, 18min, 20min etc., each component is uniformly mixed in open mill by being kneaded, and is made manufactured
Rubber performance is uniform and stable.
Then two sections of sulfidations are carried out, light aging resisting fluorubber composite material is obtained.The temperature of one step cure is 155 DEG C
~165 DEG C, such as can be 155 DEG C, 158 DEG C, 160 DEG C, 162 DEG C, 165 DEG C etc., vulcanization time 15-20min, for example,
It is fixed to carry out preliminary vulcanization to fluorubber composite material by one step cure by 15min, 16min, 17min, 18min, 20min etc.
Type.Then post vulcanization, the temperature of post vulcanization are carried out under the protection of nitrogen or other inert gases (such as helium, argon gas etc.)
Degree is 230 DEG C -290 DEG C, for example, 230 DEG C, 250 DEG C, 270 DEG C, 290 DEG C etc., vulcanization time 28-35h, for example, 28h,
30h, 33h, 35h etc..Keep the vulcanization of fluorubber composite material more thorough by post vulcanization, remove impurity therein, improves
Crosslinking degree between molecule, the fluorubber composite material made have more stable physical and chemical performance.
The SiO needed in preparation process2Hollow sphere can be prepared via a method which to obtain:
Step 101 prepares melamino-formaldehyde (Melamine-Formaldehyde, MF) microballoon
Compound concentration is the formalin of 0.0139-0.0278g/ml, and under 70-80 DEG C of water bath condition, melamine is added
Then formic acid is added in amine, continue to stir 20-50min after reaction solution is muddy, reaction product is washed and dried, obtains three
Melamine-formaldehyde microballoon.
Wherein, the molar ratio of formaldehyde and melamine is 4.5-9:1.
Step 102, preparation SiO2With melamino-formaldehyde complex microsphere
The melamino-formaldehyde aqueous solution that mass fraction is 3-5% is prepared with melamino-formaldehyde microballoon powder then to take
The melamino-formaldehyde aqueous solution of 1 parts by volume sequentially adds the pure water of 13-18 parts by volume and the isopropanol of 45-55 parts by volume, adjusts
PH to 7-8 is saved product is filtered drying, obtains SiO after addition ethyl orthosilicate is stirred to react 4-5h2And melamino-formaldehyde
Complex microsphere.
Step 103, preparation SiO2Hollow sphere
By SiO2It is put into 500-510 DEG C of Muffle furnace with melamino-formaldehyde complex microsphere and calcines 4-5h, obtain SiO2It is empty
Bulbus cordis.
Specifically, in a step 101, it reacts to obtain melamino-formaldehyde microballoon with formaldehyde by melamine.Wherein, first
The concentration of aldehyde solution be 0.0139-0.0278g/ml, for example, 0.0139g/ml, 0.0160g/ml, 0.0202g/ml,
0.0253g/ml, 0.0278g/ml etc..Under 70-80 DEG C of water bath condition, for example, 70 DEG C, 72 DEG C, 75 DEG C, 78 DEG C, 80 DEG C etc.,
Melamine is added into above-mentioned formalin, the molar ratio of formaldehyde and melamine is 4.5-9:1 in reaction solution, for example,
4.5:1,6:1,7:1,9:1 etc., so that formaldehyde is sufficiently reacted with melamine.It is completely dissolved to the melamine in reaction solution
Afterwards, formic acid is added thereto, so that condensation reaction occurs in acid condition for formaldehyde and melamine.For example, by 7.5-
The formalin that 15g mass concentration is 37% is dissolved in the deionized water of 200ml, and under 75 DEG C of water bath conditions, 2.5g tri- is added
Then poly cyanamid adds 0.15-0.95ml formic acid, to guarantee formaldehyde and the condensation reaction of melamine in acid condition.
After formic acid is added, continue to stir 20-50min, for example, 20min, 30min, 40min, 50min etc. to reaction solution muddiness, so
Reaction product is washed and dried afterwards, obtains the melamino-formaldehyde microballoon powder that partial size is 50-1950nm.
In a step 102, the above-mentioned melamino-formaldehyde microballoon powder being prepared is used to prepare mass fraction as 3-5%
Melamino-formaldehyde aqueous solution, so that melamino-formaldehyde microballoon powder is uniformly dispersed in the solution using ultrasonic wave.Then, it takes
The isopropanol of the melamino-formaldehyde aqueous solution of 1 parts by volume, the pure water and 45-55 parts by volume that sequentially add 13-18 parts by volume is made
For solvent, pH to 7-8 is adjusted with ammonium hydroxide.Ethyl orthosilicate (i.e. Tetraethyl is added into reaction solution again
Orthosilicate, TEOS), it is stirred to react 4-5h, such as reaction 4h, 4.5h, 5h etc., it is anti-by the hydrolysis and condensation of TEOS
It answers, forms one layer of SiO on melamino-formaldehyde microballoon powder2Film, then suction filtration drying is carried out to reaction product, it can be obtained
SiO2With melamino-formaldehyde complex microsphere.
In step 103, by the above-mentioned SiO being prepared2It is put into Muffle furnace and calcines with melamino-formaldehyde complex microsphere,
Calcination temperature is 500 DEG C -510 DEG C, for example, 500 DEG C, 502 DEG C, 505 DEG C, 508 DEG C, 510 DEG C etc., calcination time 4-5h, example
For example 4h, 4.3h, 4.5h, 4.7h, 5h etc..SiO2With the melamino-formaldehyde microballoon in melamino-formaldehyde complex microsphere, warp
It is decomposed after crossing calcining, leaves behind SiO2Shell, that is, the SiO for finally needing to obtain2Hollow sphere.
The third aspect, the embodiment of the invention provides above-mentioned light aging resisting fluorubber composite materials in digital optical processing technique
Application in laser projection device.
Laser emission ability in laser projection device is strong and energy height is concentrated, compared with ordinary light source, the light of laser
Energy density is bigger, and it is old that long-term irradiation is easy to cause other components in laser projection device that light occurs on other components
Change failure and heat ageing failure.Therefore, it in order to guarantee the reliability of each component element long period work in laser projection device, needs to adopt
Certain measure is taken to be protected.Light aging resisting fluorubber composite material provided in an embodiment of the present invention, can be according to different
It needs to be fabricated to partition of various shapes, gasket etc., laser projection device is placed on, in particular by DLP (Digital
Light Processing, digital light processing) principle laser projection device in, laser light source is stopped, to reduce
A possibility that light ageing failure and heat ageing failure, occurs for the other elements in laser projection device, extends in laser projection device
The service life of each element.
Concrete application scene of the light aging resisting fluorubber composite material in digital optical processing technique laser projection device is extremely
Rare following four:
First, as shown in the schematic diagram of 1 leftmost side of attached drawing, in DLP laser projection device, the light that laser light source issues is all
Photoconductive tube 1 need to be passed through, some light can be radiated at 1 outside of photoconductive tube, to avoid these stray lights from generating shadow to other components
It rings, needs to block the stray light at photoconductive tube 1.Therefore, the measure taken in the prior art is in the outside of photoconductive tube 1
It is arranged a photoconductive tube metallic support 2, stray light is blocked by photoconductive tube metallic support 2.But the thermal resistance of metal compared with
It is small, it is higher by heating up after laser irradiation, cause the temperature of component around also with raising, to affect component around
The reliability of work.Therefore, as shown in the schematic diagram among attached drawing 1, light aging resisting fluorubber is answered using the embodiment of the present invention
Isolating frame 3 is made in condensation material, and as shown in the schematic diagram of 1 rightmost side of attached drawing, isolating frame 3 is set in photoconductive tube 1 along its length
On, and be integrally placed in photoconductive tube metallic support 2, for blocking the stray light in photoconductive tube 1, thus to other elements around into
Row protection, extends the service life of each component and laser projection device.
Second, as shown in the schematic diagram of 2 leftmost side of attached drawing, DLP laser projection device uses DMD (Digital
Micromirror Device, digital micro-mirror chip) it is used as chief processing element to realize optical digital computing process, and
To the epoxy resin 5 that DMD 4 seals, due to being easy to appear aging phenomenon, further resulting in for a long time by laser irradiation
DMD 4 fails.As shown in the schematic diagram among attached drawing 2, using light aging resisting fluorubber composite wood provided in an embodiment of the present invention
Material be made it is similar with 5 shape of epoxy resin on DMD 4 block partition 6, epoxy resin 5 and to block partition 6 be all rectangle
Frame will be blocked on the epoxy resin 5 that partition 6 is covered in digital micromirror elements as shown in rightmost side schematic diagram in attached drawing 2
Side, can prevent 5 aging of epoxy resin to avoid laser direct irradiation epoxy resin 5.
Third, as shown in the schematic diagram of the leftmost side in attached drawing 3, laser galvanometer is in DLP laser projection device for controlling
The device of laser beam deflection, when laser galvanometer receives closing (off) signal, laser beam (laser beam at this time, as closing shape
The light of state, hereinafter referred to as off light) it can be irradiated on laser galvanometer bracket 7, laser galvanometer bracket 7 is after being irradiated by light
Temperature increases, and the parameters such as intensity are affected, and the less reliable for causing laser galvanometer bracket 7 to work.The prior art is adopted
The measure taken is that off light is blocked and absorbed with the sheet metal of inking, avoids laser galvanometer bracket 7 by off light
Direct irradiation.It is larger by increasing extent of temperature after illumination but since the thermal resistance of metal is smaller, lead to laser galvanometer bracket 7
Temperature also increases, and is unfavorable for keeping the stability of laser galvanometer bracket 7.In addition, long-term off light irradiation also results in
The layer of ink on sheet metal surface is volatilized, and the shading of sheet metal, extinction effect is made to be deteriorated.And such as 3 centre of attached drawing and most right schematic diagram
It is shown, rubber baffle 8 is made using light aging resisting fluorubber composite material provided in an embodiment of the present invention, substitutes laser vibration with it
Metal baffle on mirror support 7, then can use the heat insulating function of rubber baffle 8, and off light is blocked and absorbed, is kept away
The excessive temperature rise for having exempted from laser galvanometer bracket 7 ensure that the long-time service of laser galvanometer bracket 7.
4th, off light 9 can be also irradiated on the shell 10 of DLP laser projection device, will lead to 10 aging of shell, shadow
Ring the service life of shell 10.The measure that the prior art is taken is to coat one layer of ink on 10 surface of shell, absorbs off using layer of ink
Light avoids the premature aging of shell 10.But prolonged off light 9 irradiates, and 10 temperature of shell can be made higher, influences surrounding
The reliability of other components work.In addition the prolonged irradiation of off light 9 also results in layer of ink volatilization, makes layer of ink from absorption
Layer becomes reflecting layer, to have an adverse effect to the use of shell 10.As shown in attached drawing 4-1 and attached drawing 4-2, using the present invention
Embodiment provide light aging resisting fluorubber composite material heat insulating mattress 11 is made, with heat insulating mattress 11 by shell 10 by off
The position that light 9 is irradiated to covers, and avoids 9 direct irradiation shell 10 of off light, thus extend the ageing time of shell 10,
Extend shell 10 uses the time.
It will be described in detail below by specific embodiment:
Embodiment 1
A kind of light aging resisting fluorubber composite material is present embodiments provided, which includes
The component of following mass parts:
100 parts of perfluoroether raw rubber (model: PFR94, You Huale sealing technique development corporation, Ltd. provide), partial size 100nm-
2 μm of SiO25 parts of hollow sphere, 3 parts of vulcanizing agent (wherein, 2.3 parts of bisphenol AF, 0.7 part of benzyltriphenylphosphonium chloride), paraffin 3
Part, hindered amine light stabilizer (model: 944, produced by German BASF joint-stock company) 0.4 part.
The light aging resisting fluorubber composite material is prepared via a method which to obtain:
After the thin logical 8min that plasticates, 5 parts of SiO are added on the open mill that roll spacing is 0.1mm in 100 parts of perfluoroether raw rubbers2It is empty
Bulbus cordis, 3 parts of paraffin, 0.4 part of hindered amine light stabilizer carry out mixing 15min, and 3 parts of vulcanizing agents are then added, and carry out at 160 DEG C
One step cure 15min, then post vulcanization 30h is carried out at 260 DEG C under the protection of nitrogen, obtain light aging resisting fluorubber material
Material.
Wherein, SiO2Hollow sphere is prepared via a method which to obtain:
Step 1 prepares melamino-formaldehyde microballoon
The formalin that 10g mass concentration is 37% is dissolved in the deionized water of 200ml, under 75 DEG C of water bath conditions,
The molar ratio of addition 2.5g melamine, formaldehyde and melamine is 6:1, and 0.55ml formic acid is then added, muddy to reaction solution
Continue to stir 35min after turbid, reaction product is washed and dried, melamino-formaldehyde microballoon is obtained.
Step 2, preparation SiO2With melamino-formaldehyde complex microsphere
The melamino-formaldehyde water that mass fraction is 3% is prepared with melamino-formaldehyde microballoon powder obtained in step 1
Then solution takes the melamino-formaldehyde aqueous solution of 1mL, sequentially add the pure water of 15mL and the isopropanol of 50mL, with ammonium hydroxide tune
PH to 7.5 is saved product is filtered drying, obtains SiO after addition TEOS is stirred to react 5h2With melamino-formaldehyde complex microsphere.
Step 3, preparation SiO2Hollow sphere
By SiO2It is put into melamino-formaldehyde complex microsphere in 500 DEG C of Muffle furnace and calcines 5h, obtain SiO2Hollow sphere.
Embodiment 2
A kind of light aging resisting fluorubber composite material is present embodiments provided, which includes
The component of following mass parts:
100 parts of perfluoroether raw rubber (model: PFR94), 100nm-2 μm of partial size of SiO23 parts of hollow sphere, 2.5 parts of vulcanizing agent
(wherein, 2 parts of bisphenol AF, 0.5 part of benzyltriphenylphosphonium chloride), 2 parts of paraffin, hindered amine light stabilizer (model: 944) 0.2
Part.
The light aging resisting fluorubber composite material is prepared via a method which to obtain:
After the thin logical 15min that plasticates, 3 parts of SiO are added on the open mill that roll spacing is 0.3mm in 100 parts of perfluoroether raw rubbers2It is empty
Bulbus cordis, 2 parts of paraffin, 0.2 part of hindered amine light stabilizer carry out mixing 20min, then be added 2.5 parts of vulcanizing agents, 155 DEG C into
Row one step cure 15min, then post vulcanization 28h is carried out at 290 DEG C under the protection of nitrogen, obtain light aging resisting fluorubber material
Material.
Wherein, SiO2The preparation method is the same as that of Example 1 for hollow sphere.
Embodiment 3
A kind of light aging resisting fluorubber composite material is present embodiments provided, which includes
The component of following mass parts:
100 parts of perfluoroether raw rubber (model: PFR94), 100nm-2 μm of partial size of SiO24 parts of hollow sphere, 2.7 parts of vulcanizing agent
(wherein, 2.1 parts of bisphenol AF, 0.6 part of benzyltriphenylphosphonium chloride), 2.7 parts of paraffin, hindered amine light stabilizer (model:
944) 0.3 part.
The light aging resisting fluorubber composite material is prepared via a method which to obtain:
After the thin logical 12min that plasticates, 4 parts of SiO are added on the open mill that roll spacing is 0.2mm in 100 parts of perfluoroether raw rubbers2It is empty
Bulbus cordis, 2.7 parts of paraffin, 0.3 part of hindered amine light stabilizer carry out mixing 15min, 2.7 parts of vulcanizing agents are then added, at 165 DEG C
One step cure 18min is carried out, then carries out post vulcanization 35h at 230 DEG C under the protection of nitrogen, obtains light aging resisting fluorubber
Material.
Wherein, SiO2The preparation method is the same as that of Example 1 for hollow sphere.
Application Example
Thermal coefficient and light aging resisting time are carried out to the light aging resisting fluorubber composite material in embodiment 1- embodiment 3
Measurement and as a comparison case with perfluoroether raw rubber be compared with the respective performances of embodiment 1- embodiment 3, to examine reality
Apply the heat-proof quality and light aging resisting property of the light aging resisting fluorubber composite material in a 1- embodiment 3.
According to ASTM D5470 standard, using stable state heat-flow meter method, certain heat flow, pressure are applied to test sample,
Thickness by measuring test sample and the temperature difference between hot plate/cold plate, obtain the thermal coefficient of sample.
The light aging resisting time is measured using laser.Using DC power supply power supply (voltage 32V, electric current 2.5A) driving
Laser issue blue light, by embodiment 1- embodiment 3 light aging resisting fluorubber composite material and the perfluoroether raw rubber side of being cut into
Shape is put in same position under blue light and is irradiated, and places a sheet glass in the bottom of every group of test sample respectively.Then, it sees
Examine whether test sample deforms, whether sheet glass is stained.If test sample deformation occurs or sheet glass is stained, illustrate to survey
The performance of test agent has declined, and aging phenomenon occurs, should stop testing and record the time used at this time, which is
The light aging resisting time of test sample.
Test result is as shown in table 1:
1 test result of table
| Test sample serial number | Thermal coefficient (W/MK) | The light aging resisting time (h) |
| Embodiment 1 | 0.1 | 2200 |
| Embodiment 2 | 0.15 | 1200 |
| Embodiment 3 | 0.12 | 1800 |
| Comparative example (perfluoroether raw rubber) | 0.5 | 300 |
It can be seen from Table 1 that the thermal coefficient of embodiment 1- embodiment 3 is significantly lower than comparative example, illustrate of the invention real
The light aging resisting fluorubber composite material for applying example offer has good heat-proof quality, and partition, gasket is made with the composite material
Deng can protect the element being entirely covered, avoid element temperature rise excessively high.Meanwhile the light aging resisting time of embodiment 1- embodiment 3
It also greatly improved, illustrate after above-mentioned improvement compared with comparative example, light aging resisting fluorubber provided in an embodiment of the present invention
Composite material can keep good working order in a long time, and the element to be entirely covered, which provides, to be effectively protected, from
And the job stability of element is improved, extend the service life of element.
The foregoing is merely presently preferred embodiments of the present invention, the protection scope being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (8)
1. a kind of light aging resisting fluorubber composite material, which is characterized in that the light aging resisting fluorubber composite material use with
The component of lower mass parts is prepared:
100 parts of perfluoroether raw rubber, 100nm-2 μm of partial size of SiO23-5 parts of hollow sphere, 2.5-3 parts of vulcanizing agent, 2-3 parts of paraffin, light
0.2-0.4 parts of stabilizer；
The vulcanizing agent includes the component of following mass parts: 2-2.3 parts of bisphenol AF, 0.5-0.7 parts of benzyltriphenylphosphonium chloride；
The light stabilizer is hindered amine light stabilizer；
Wherein, the SiO of every kind of partial size2Hollow sphere quantity is distributed according to statistics rule to be arranged, so that the SiO that particle size is different2
The interspersed arrangement of hollow sphere.
2. the preparation method of light aging resisting fluorubber composite material described in claim 1, comprising the following steps:
Perfluoroether raw rubber is poured into open mill, after the thin logical 8-15min that plasticates, SiO is added2Hollow sphere, paraffin, light stabilizer mix
15-20min is refined, vulcanizing agent is then added, one step cure 15-20min is carried out at 155~165 DEG C, then in nitrogen or indifferent gas
Post vulcanization 28-35h is carried out under the protection of body at 230~290 DEG C, obtains the light aging resisting fluorubber composite material.
3. preparation method according to claim 2, which is characterized in that the SiO2Hollow sphere is prepared via a method which
It arrives:
Step a, melamino-formaldehyde microballoon is prepared
Compound concentration is the formalin of 0.0139-0.0278g/ml, under 70-80 DEG C of water bath condition, melamine is added, so
After formic acid is added, continue to stir 20-50min after reaction solution is muddy, reaction product washed and dried, the trimerization is obtained
Cyanamide formaldehyde microballoon；
Wherein, the molar ratio of the formaldehyde and the melamine is 4.5-9:1；
Step b, SiO is prepared2With melamino-formaldehyde complex microsphere
The melamino-formaldehyde aqueous solution that mass fraction is 3%-5%, which is prepared, with the melamino-formaldehyde microballoon then takes 1
The melamino-formaldehyde aqueous solution of parts by volume sequentially adds the pure water of 13-18 parts by volume and the isopropyl of 45-55 parts by volume
Alcohol adjusts pH to 7-8 and product is filtered drying, obtains the SiO after addition ethyl orthosilicate is stirred to react 4-5h2With three
Melamine-formaldehyde complex microsphere；
Step c, SiO is prepared2Hollow sphere
By the SiO24-5h is calcined at 500-510 DEG C with melamino-formaldehyde complex microsphere, obtains the SiO2Hollow sphere.
4. light aging resisting fluorubber composite material described in claim 1 answering in digital optical processing technique laser projection device
With.
5. application according to claim 4, which is characterized in that using the light aging resisting fluorubber composite material be made every
From frame, the isolating frame is set on photoconductive tube along its length, and is integrally placed in photoconductive tube metallic support.
6. application according to claim 4, which is characterized in that screening is made using the light aging resisting fluorubber composite material
Bulkhead, the top for blocking the epoxy resin that partition is covered in digital micromirror elements.
7. application according to claim 4, which is characterized in that rubber is made using the light aging resisting fluorubber composite material
Glue baffle, for substituting the metal baffle on laser galvanometer bracket.
8. application according to claim 4, which is characterized in that using the light aging resisting fluorubber composite material be made every
Heat pad piece is covered on the shell for being in the laser projection device that the light of closed state is irradiated to, for stopping the light
Line.
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| CN108646504A (en) * | 2018-03-22 | 2018-10-12 | 青岛海信电器股份有限公司 | A kind of galvanometer holder applied in laser projection device |
| CN111171480B (en) * | 2018-11-10 | 2022-02-18 | 台州恩普密封件有限公司 | Lip-shaped sealing ring for automobile engine rotating shaft |
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| CN1715320A (en) * | 2005-07-11 | 2006-01-04 | 张伟 | Composition for producing elastic member |
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| CN1216565A (en) * | 1996-04-22 | 1999-05-12 | 罗狄亚化学公司 | Method for preparing hollow silica particles |
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