CN107099148A - A kind of VHD room temperature vulcanization bi-component fireproof silicone rubber and preparation method thereof - Google Patents
A kind of VHD room temperature vulcanization bi-component fireproof silicone rubber and preparation method thereof Download PDFInfo
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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
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/085—Copper
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0856—Iron
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0887—Tungsten
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
It is used for VHD room temperature vulcanization bi-component fireproof silicone rubbers with good nuclear radiation shield function in place such as nuclear power station, hospital, nuclear submarine and preparation method thereof the present invention relates to a kind of, belongs to high molecule sealing materials field.Fireproof silicone rubber in the present invention is made up of component A and B component, calculate by weight, component A includes 100 parts of vinyl polysiloxane, 0.1 5 parts of vinyl platinum catalyst, 0.5 30 parts of silica, 5 120 parts of inorganic combustion inhibitor, 500 1000 parts of surface modification of metals powder；B component includes 100 parts of vinyl polysiloxane, 4 80 parts of polymethyl hydrogen siloxanes, 0.5 30 parts of silica, 5 120 parts of inorganic combustion inhibitor, 500 800 parts of surface modification of metals powder.There is higher tensile strength, elongation at break and radiation-resistant property, it is easier to produce density more than 3.5g/cm after the silicon rubber room temperature vulcanization that the present invention is prepared3Product, while product life is longer.
Description
Technical field
The present invention relates to a kind of good nuclear radiation shield function that has for the place such as nuclear power station, hospital, nuclear submarine
VHD room temperature vulcanization bi-component fireproof silicone rubber and preparation method thereof, belongs to high molecule sealing materials field.
Background technology
Nuclear power is clean energy resource, and for the purpose of environmental protection and reduction discharge, China is greatly developing nuclear power station at present
Build, nuclear power technology and most material of the construction of nuclear power station need dependence on import before, wherein there is one kind to be built for nuclear power station
The encapsulant of perforate on building structure, with functions such as fire prevention, waterproof, nuclear screening.1982.12.27 B&B
The United States Patent (USP) of Insulation, Inc. company Application No. 4436868 discloses a kind of bi-component silicon containing lead powder first
Rubber, patent produces product trade name Radflex accordingly for Promatec companies, and this company then produces and substituted with iron powder again
The like product of lead powder.A large amount of filling lead powder and iron powder impart the higher density of fluid sealant, generally higher than 2.35g/cm3, because
Its high density and with good nuclear screening effect, be largely used to nuclear power station.Chinese patent 2010101643560,
2011103942792nd, 201110368015X discloses the similar technique based on the metal dusts such as lead powder, iron powder.
China is building nuclear power station mainly using Generation Ⅲ at present, wherein the China dragon 1 of Chinese independent intellectual property right
Number the 3rd nuclear power technology proposes requirements at the higher level to the encapsulant of cable in nuclear island and the through hole of pipeline, it is desirable to which itself and weight are brilliant
The nuclear screening effect of stone concrete is identical, that is, density will reach 3.5g/cm3。
There are the following problems for prior art：First, present lead powder is prohibitted the use of because of its danger that there is infringement people's health；
Second, other metal dusts such as iron powder are typically not less than 45 micro- because hardness is high and activity is extremely difficult to thinner particle diameter by force
Meter, largely particle diameter is powder filled greatly can significantly reduce its physical and mechanical properties in high material, it is impossible to meet to use well and want
Ask；3rd, to reach 3.5g/cm3Density, it is necessary to largely fill powder, cause each group viscosity high, poor fluidity is difficult to apply
Work, the product tensile strength after solidification is very low, it is impossible to meet application requirement.
The content of the invention
In view of the above-mentioned problems, the present invention, which provides a kind of safety, density, reaches 3.5g/cm3, each component good fluidity, construction
Easy, solidification after-drawing intensity exceedes 3MPa VHD room temperature vulcanization bi-component fireproof silicone rubber.
Technical scheme is as follows.
A kind of VHD room temperature vulcanization two-component silicone rubber, is made up of component A and B component.Calculate by weight, A
Component includes 100 parts of vinyl polysiloxane, 0.1-5 parts of vinyl platinum catalyst, 0.5-30 parts of silica, 5-
120 parts of inorganic combustion inhibitor, 500-1000 parts of surface modification of metals powder.Calculated also according to parts by weight, B component is included
100 parts of vinyl polysiloxane, 4-80 parts of polymethyl hydrogen siloxanes, 0.5-30 parts of silica, 5-120 parts of inorganic resistance
Fire agent, 500-800 parts of surface modification of metals powder.A, B component by weight 1:1 hybrid reaction, after solidification, the density of resulting product
More than or equal to 3.5g/cm3。
The vinyl polysiloxane is end-vinyl dimethyl silicone polymer, the poly- methyl ethylene silica of end-vinyl
One or more of combinations in the double phenyl polysiloxanes of alkane, many vinyl.
Described silica is one or two kinds of combinations of aerosil or precipitated silica.
Described inorganic combustion inhibitor is one or more of combinations in aluminium hydroxide, magnesium hydroxide, Firebrake ZB.
Described surface modification of metals powder, refers to the metal powder being surface-treated with VTES, gold
Category powder is one or more of combinations in iron powder, copper powder, tungsten powder.The average grain diameter of described metal powder is less than 50 microns.Gold
The particle diameter of category powder directly affects the physical property of product, such as intensity, radiation-resistant property.1 ~ 25 micron of optimized particle size scope.
In the present invention, the preparation method of VHD room temperature vulcanization two-component silicone rubber includes following 3 step.
1st, surface modification is carried out to metal powder：（1）VTES is dissolved in the mixed liquor shape of water and ethanol
Into solution, the mass ratio of its reclaimed water and ethanol is 100:1~100:50, the quality of VTES in the solution
Concentration is 0.2% ~ 10%；（2）The solution that the first step is configured is with metal powder in spraying high-speed mixer and mixing, every 100 parts of metal powders
End, 0.2 ~ 10 part of the solution configured using the first step, speed of agitator is not less than 100 revs/min, 3 ~ 10 minutes time；（3）By
The metal that two steps are mixed point is extracted, and is dried 1 hour in 105 DEG C of high temperature ovens.
2nd, component A is prepared：（1）Vinyl polysiloxane and platinum catalyst are put into the scuffing of cylinder bore of high speed dispersor successively；
（2）Open high speed dispersor, the linear velocity of dispersion impeller sequentially adds silica in the range of 2 ~ 5m/s, inorganic combustion inhibitor and
Surface modification of metals powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, is continued
It is scattered more than 60 minutes；（4）By in the one of container for preparing the component A loading bi-component glue bottles completed.
3rd, component B is prepared：（1）Vinyl polysiloxane and polymethyl hydrogen siloxane are put into the drawing of high speed dispersor successively
In cylinder；（2）High speed dispersor is opened, the linear velocity of dispersion impeller sequentially adds silica in the range of 2 ~ 5m/s, inorganic fire-retarded
Agent and surface modification of metals powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s,
Continue scattered more than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
The A for preparing according to the method described above, B component not Zhuan Yu bi-component glue bottle two connected independent hydrostatic columns
In, hydrostatic column afterbody has piston seal, and glue rifle promotes two pistons extrusion A, B components simultaneously when using, by mounted in
The static mixer mixing A of outlet, B component.In platinum after vinyl polysiloxane and polymethyl hydrogen siloxane mixing in formula
Cross-linking reaction can be produced under the catalysis of catalyst, silicon rubber is generated.So when designing two-part formulations, by platinum catalyst and poly-
Methyl hydrogen siloxane is separately packed.
The present invention fills two-component silicone rubber using the modified metal dust in surface, to obtain the density of superelevation.It is real
Testing result proves, non-modified metal dust is difficult to realize largely fills in two-component silicone rubber.And add surface modification
The beneficial effect that metal dust is brought has：1st, in the case of identical addition, A, the viscosity of B component are significantly reduced, it is ensured that had
Preferable mobility；2nd, in the case of identical addition, the product after room temperature vulcanization has higher tensile strength, extension at break
Rate and radiation-resistant property；3rd, it is easier to produce density more than 3.5g/cm3Product；4th, prevent the metal powder in product normal
Aoxidized when using, improve product life.
Embodiment
The present invention is described further with reference to instantiation.
Embodiment 1.
1st, surface modification is carried out to metal powder：（1）VTES is dissolved in the mixed liquor shape of water and ethanol
Into solution, the mass ratio of its reclaimed water and ethanol is 100:15, the mass concentration of VTES in the solution is
5%；（2）The iron powder of 10 microns of solution that the first step is configured and average grain diameter is in spraying high-speed mixer and mixing, every 100 parts of iron powders,
8 parts of the solution configured using the first step, 100 revs/min of speed of agitator, 5 minutes time；（3）The iron powder that second step is mixed
Divide and extract, dried 1 hour in 105 DEG C of high temperature ovens.
2nd, component A is prepared：（1）Successively by 100 parts of contents of ethylene be 0.3% end-vinyl dimethyl silicone polymer and 2
Part vinyl platinum catalyst is put into the scuffing of cylinder bore of high speed dispersor；（2）Open high speed dispersor, the linear velocity of dispersion impeller 2 ~
In the range of 5m/s, 10 parts of aerosils are sequentially added, 120 parts of aluminium hydroxides and 750 parts of surfaces are modified iron powder；（3）Improve
The speed of agitator of high speed dispersor, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered more than 60 minutes；（4）Will system
The standby component A completed loads in one of container of bi-component glue bottle.
3rd, component B is prepared：（1）Successively by 100 parts of contents of ethylene for 0.3% end-vinyl dimethyl silicone polymer and
30 parts of hydrogen contents are put into the scuffing of cylinder bore of high speed dispersor for 0.35% polymethyl hydrogen siloxane；（2）High speed dispersor is opened, point
The linear velocity of disk is dissipated in the range of 2 ~ 5m/s, sequentially adds 10 parts of aerosils, 120 parts of aluminium hydroxide and 700 parts
Surface is modified iron powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues to divide
Dissipate more than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
A, B component are not fitted into bi-component glue bottle, extrusion is placed in mould, react sample preparation, conserved 7 days after after its solidification
Measure.The size of sample 1 is 50mm × 50mm × 50mm, surveys its density for 3.56g/cm3.The size of sample 2 is 13mm × 6mm
× 2mm dumbbell shape samples, survey tensile strength is 4.50MP.
Embodiment 2.
1st, surface modification is carried out to metal powder：（1）VTES is dissolved in the mixed liquor shape of water and ethanol
Into solution, the mass ratio of its reclaimed water and ethanol is 100:20, the mass concentration of VTES in the solution is
5%；（2）The copper powder of 25 microns of solution that the first step is configured and average grain diameter is in spraying high-speed mixer and mixing, every 100 parts of copper powders,
5 parts of the solution configured using the first step, 100 revs/min of speed of agitator, 5 minutes time；（3）The copper powder that second step is mixed
Divide and extract, dried 1 hour in 105 DEG C of high temperature ovens.
2nd, component A is prepared：（1）Successively by 100 parts of contents of ethylene be 0.3% end-vinyl dimethyl silicone polymer and 2
Part vinyl platinum catalyst is put into the scuffing of cylinder bore of high speed dispersor；（2）Open high speed dispersor, the linear velocity of dispersion impeller 2 ~
In the range of 5m/s, 10 parts of aerosils are sequentially added, 100 parts of aluminium hydroxides and 650 parts of surfaces are modified copper powder；（3）Improve
The speed of agitator of high speed dispersor, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered more than 60 minutes；（4）Will system
The standby component A completed loads in one of container of bi-component glue bottle.
3rd, component B is prepared：（1）Successively by 100 parts of contents of ethylene for 0.3% end-vinyl dimethyl silicone polymer and
25 parts of hydrogen contents are put into the scuffing of cylinder bore of high speed dispersor for 0.35% polymethyl hydrogen siloxane；（2）High speed dispersor is opened, point
The linear velocity of disk is dissipated in the range of 2 ~ 5m/s, sequentially adds 10 parts of aerosils, 100 parts of aluminium hydroxide and 680 parts of tables
Face is modified copper powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered
More than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
A, B component are not fitted into bi-component glue bottle, extrusion is placed in mould, react sample preparation, conserved 7 days after after its solidification
Measure.The size of sample 1 is 50mm × 50mm × 50mm, surveys its density for 3.64g/cm3.The size of sample 2 is 13mm × 6mm
× 2mm dumbbell shape samples, survey tensile strength is 3.80MP.
Embodiment 3.
1st, surface modification is carried out to metal powder：（1）VTES is dissolved in the mixed liquor shape of water and ethanol
Into solution, the mass ratio of its reclaimed water and ethanol is 100:30, the mass concentration of VTES in the solution is
8%；（2）The tungsten powder of 50 microns of solution that the first step is configured and average grain diameter is in spraying high-speed mixer and mixing, every 100 parts of tungsten powders,
2 parts of the solution configured using the first step, 100 revs/min of speed of agitator, 10 minutes time；（3）The tungsten powder that second step is mixed
Divide and extract, dried 1 hour in 105 DEG C of high temperature ovens.
2nd, component A is prepared：（1）Successively by 100 parts of contents of ethylene be 0.3% end-vinyl dimethyl silicone polymer and 2
Part vinyl platinum catalyst is put into the scuffing of cylinder bore of high speed dispersor；（2）Open high speed dispersor, the linear velocity of dispersion impeller 2 ~
In the range of 5m/s, 15 parts of aerosils are sequentially added, 100 parts of aluminium hydroxides and 450 parts of surface are modified tungsten powder；（3）Carry
The speed of agitator of high high speed dispersor, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered more than 60 minutes；（4）Will
The component A completed is prepared to load in one of container of bi-component glue bottle.
3rd, component B is prepared：（1）Successively by 100 parts of contents of ethylene for 0.3% end-vinyl dimethyl silicone polymer and
25 parts of hydrogen contents are put into the scuffing of cylinder bore of high speed dispersor for 0.35% polymethyl hydrogen siloxane；（2）High speed dispersor is opened, point
The linear velocity of disk is dissipated in the range of 2 ~ 5m/s, sequentially adds 15 parts of aerosils, 100 parts of aluminium hydroxide and 470 parts of tables
Face is modified tungsten powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered
More than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
A, B component are not fitted into bi-component glue bottle, extrusion is placed in mould, react sample preparation, conserved 7 days after after its solidification
Measure.The size of sample 1 is 50mm × 50mm × 50mm, surveys its density for 3.59g/cm3.The size of sample 2 is 13mm × 6mm
× 2mm dumbbell shape samples, survey tensile strength is 3.20MP.
Embodiment 4.
1st, surface modification is carried out to metal powder：（1）VTES is dissolved in the mixed liquor shape of water and ethanol
Into solution, the mass ratio of its reclaimed water and ethanol is 100:10, the mass concentration of VTES in the solution is
5%；（2）The tungsten powder of 50 microns of solution that the first step is configured and average grain diameter is in spraying high-speed mixer and mixing, every 100 parts of tungsten powders,
2 parts of the solution configured using the first step, 100 revs/min of speed of agitator, 10 minutes time；（3）The tungsten powder that second step is mixed
Divide and extract, dried 1 hour in 105 DEG C of high temperature ovens.
2nd, component A is prepared：（1）Successively by 100 parts of contents of ethylene for 0.3% end-vinyl dimethyl silicone polymer and
0.5 part of vinyl platinum catalyst is put into the scuffing of cylinder bore of high speed dispersor；（2）High speed dispersor is opened, the linear velocity of dispersion impeller is 2
In the range of ~ 5m/s, 5 parts of aerosils are sequentially added, 20 parts of aluminium hydroxides and 450 parts of surfaces are modified tungsten powder；（3）Improve high
The speed of agitator of fast dispersion machine, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered more than 60 minutes；（4）It will prepare
The component A of completion loads in one of container of bi-component glue bottle.
3rd, component B is prepared：（1）Successively by 100 parts of contents of ethylene for 0.3% end-vinyl dimethyl silicone polymer and
10 parts of hydrogen contents are put into the scuffing of cylinder bore of high speed dispersor for 0.35% polymethyl hydrogen siloxane；（2）High speed dispersor is opened, point
The linear velocity of disk is dissipated in the range of 2 ~ 5m/s, sequentially adds 30 parts of aerosils, 120 parts of aluminium hydroxide and 470 parts of tables
Face is modified tungsten powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered
More than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
Embodiment 5.
1st, surface modification is carried out to metal powder：（1）VTES is dissolved in the mixed liquor shape of water and ethanol
Into solution, the mass ratio of its reclaimed water and ethanol is 100:10, the mass concentration of VTES in the solution is
5%；（2）The iron powder of 10 microns of solution that the first step is configured and average grain diameter is in spraying high-speed mixer and mixing, every 100 parts of iron powders,
5 parts of the solution configured using the first step, 100 revs/min of speed of agitator, 10 minutes time；（3）The iron powder that second step is mixed
Divide and extract, dried 1 hour in 105 DEG C of high temperature ovens.
2nd, component A is prepared：（1）Successively by 100 parts of contents of ethylene be 0.3% end-vinyl dimethyl silicone polymer and 5
Part vinyl platinum catalyst is put into the scuffing of cylinder bore of high speed dispersor；（2）Open high speed dispersor, the linear velocity of dispersion impeller 2 ~
In the range of 5m/s, 10 parts of precipitated silicas are sequentially added, 100 parts of magnesium hydroxides and 750 parts of surfaces are modified iron powder；（3）Carry
The speed of agitator of high high speed dispersor, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered more than 60 minutes；（4）Will
The component A completed is prepared to load in one of container of bi-component glue bottle.
3rd, component B is prepared：（1）Successively by 100 parts of contents of ethylene for 0.3% end-vinyl dimethyl silicone polymer and
70 parts of hydrogen contents are put into the scuffing of cylinder bore of high speed dispersor for 0.35% polymethyl hydrogen siloxane；（2）High speed dispersor is opened, point
The linear velocity of disk is dissipated in the range of 2 ~ 5m/s, sequentially adds 10 parts of precipitated silicas, 120 parts of magnesium hydroxide and 700 parts
Surface be modified iron powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, is continued
It is scattered more than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
Embodiment 6.
1st, surface modification is carried out to metal powder：（1）VTES is dissolved in the mixed liquor shape of water and ethanol
Into solution, the mass ratio of its reclaimed water and ethanol is 100:30, the mass concentration of VTES in the solution is
5%；（2）The iron powder of 10 microns of solution that the first step is configured and average grain diameter is in spraying high-speed mixer and mixing, every 100 parts of iron powders,
5 parts of the solution configured using the first step, 100 revs/min of speed of agitator, 10 minutes time；（3）The iron powder that second step is mixed
Divide and extract, dried 1 hour in 105 DEG C of high temperature ovens.
2nd, component A is prepared：（1）Successively by 100 parts of contents of ethylene be 0.3% end-vinyl dimethyl silicone polymer and 1
Part vinyl platinum catalyst is put into the scuffing of cylinder bore of high speed dispersor；（2）Open high speed dispersor, the linear velocity of dispersion impeller 2 ~
In the range of 5m/s, 10 parts of precipitated silicas are sequentially added, 120 parts of aluminium hydroxides and 750 parts of surfaces are modified iron powder；（3）Carry
The speed of agitator of high high speed dispersor, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered more than 60 minutes；（4）Will
The component A completed is prepared to load in one of container of bi-component glue bottle.
3rd, component B is prepared：（1）Successively by 100 parts of contents of ethylene for 0.3% end-vinyl dimethyl silicone polymer and
50 parts of hydrogen contents are put into the scuffing of cylinder bore of high speed dispersor for 0.35% polymethyl hydrogen siloxane；（2）High speed dispersor is opened, point
The linear velocity of disk is dissipated in the range of 2 ~ 5m/s, sequentially adds 10 parts of precipitated silicas, 20 parts of aluminium hydroxide and 700 parts
Surface is modified iron powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues to divide
Dissipate more than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
Claims (9)
1. a kind of VHD room temperature vulcanization bi-component fireproof silicone rubber, it is characterised in that：It is made up of component A and B component, presses
Parts by weight calculate, component A comprising 100 parts vinyl polysiloxane, 0.1-5 parts of vinyl platinum catalyst, 0.5-30 parts
Silica, 5-120 parts of inorganic combustion inhibitor, 500-1000 parts of surface modification of metals powder, B component includes 100 parts of second
Alkenyl polysiloxanes, 4-80 part polymethyl hydrogen siloxane, 0.5-30 parts of silica, 5-120 parts of inorganic combustion inhibitor, 500-
800 parts of surface modification of metals powder.
2. a kind of VHD room temperature vulcanization bi-component fireproof silicone rubber as claimed in claim 1, it is characterised in that：Described
Vinyl polysiloxane is end-vinyl dimethyl silicone polymer, end-vinyl Polymethyl methacrylate, many vinyl pair
One or more of combinations in phenyl polysiloxane.
3. a kind of VHD room temperature vulcanization bi-component fireproof silicone rubber as claimed in claim 1, it is characterised in that：Described
Silica is one or both of aerosil or precipitated silica.
4. a kind of VHD room temperature vulcanization bi-component fireproof silicone rubber as claimed in claim 1, it is characterised in that：Described
Inorganic combustion inhibitor is one or more of combinations in aluminium hydroxide, magnesium hydroxide, Firebrake ZB.
5. a kind of VHD room temperature vulcanization bi-component fireproof silicone rubber as claimed in claim 1, it is characterised in that：Described
Surface modification of metals powder, refers to the metal powder being surface-treated with VTES, and metal powder is iron powder, copper
One or more of combinations in powder, tungsten powder.
6. a kind of VHD room temperature vulcanization bi-component fireproof silicone rubber as claimed in claim 5, it is characterised in that：Described
Surface modification of metals powder, average grain diameter is less than 50 microns.
7. a kind of VHD room temperature vulcanization bi-component fireproof silicone rubber as claimed in claim 6, it is characterised in that：Described
Surface modification of metals powder, average grain diameter preferably is 1-25 microns.
8. a kind of application method of VHD room temperature vulcanization bi-component fireproof silicone rubber, it is characterised in that：By A, B for preparing
Component is respectively in two connected independent hydrostatic columns loaded on bi-component glue bottle, and hydrostatic column afterbody has piston seal,
Glue rifle promotes two piston extrusion A, B components simultaneously when using, and passes through the static mixer mixing A mounted in outlet, B component.
9. a kind of preparation method of VHD room temperature vulcanization bi-component fireproof silicone rubber, it is characterised in that comprise the following steps：
1）Surface modification is carried out to metal powder：（1）The mixed liquor that VTES is dissolved in water and ethanol is formed molten
The mass ratio of liquid, its reclaimed water and ethanol is 100:1~100:50, the mass concentration of VTES in the solution
For 0.2% ~ 10%；（2）The solution that the first step is configured is with metal powder in spraying high-speed mixer and mixing, and every 100 parts of metal dusts make
0.2 ~ 10 part of the solution configured with the first step, speed of agitator is not less than 100 revs/min, 3 ~ 10 minutes time；（3）By second step
The metal mixed point is extracted, and is dried 1 hour in 105 DEG C of high temperature ovens；
2nd, component A is prepared：（1）Vinyl polysiloxane and platinum catalyst are put into the scuffing of cylinder bore of high speed dispersor successively；（2）Open
High speed dispersor is opened, the linear velocity of dispersion impeller sequentially adds silica in the range of 2 ~ 5m/s, and inorganic combustion inhibitor and surface change
Property metal powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, continues scattered 60
More than minute；（4）By in the one of container for preparing the component A loading bi-component glue bottles completed；
3rd, component B is prepared：（1）Vinyl polysiloxane and polymethyl hydrogen siloxane are put into the scuffing of cylinder bore of high speed dispersor successively
In；（2）High speed dispersor is opened, the linear velocity of dispersion impeller sequentially adds silica, inorganic combustion inhibitor in the range of 2 ~ 5m/s
With surface modification of metals powder；（3）The speed of agitator of high speed dispersor is improved, allows the linear velocity of dispersion impeller to reach more than 10m/s, after
It is continuous scattered more than 60 minutes；（4）By in the other in which container for preparing the component B loading bi-component glue bottles completed.
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| CN116814077A (en) * | 2023-08-25 | 2023-09-29 | 四川犀迈湾科技有限公司 | Bi-component heat-conducting gel and preparation method and application thereof |
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