CN109666301A - A kind of automobile engine sealing system liquid silastic and preparation method thereof - Google Patents
A kind of automobile engine sealing system liquid silastic and preparation method thereof Download PDFInfo
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- CN109666301A CN109666301A CN201811600943.2A CN201811600943A CN109666301A CN 109666301 A CN109666301 A CN 109666301A CN 201811600943 A CN201811600943 A CN 201811600943A CN 109666301 A CN109666301 A CN 109666301A
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
- C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
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- 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
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
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- 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
- C08K2201/011—Nanostructured additives
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- 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
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a kind of automobile engine sealing system liquid silastics and preparation method thereof, resistance to oil assistant, heat-proof aging auxiliary agent and compression set regulator, resistance to oil assistant is made of magnesium, calcium-silicate and long chain vinyl radical siloxane, magnesium, calcium-silicate and 70 parts ~ 90 parts long chain vinyl radical siloxanes that content is 10 parts ~ 30 parts；Heat-proof aging auxiliary agent is by nano-cerium oxide, iron oxide and phenyl-vinyl silicon oil composition, by introducing magnesium, the resistance to oil assistant of calcium-silicate and long chain vinyl radical siloxane composition improves the oil resistance of sizing material, its oil-resistant effect is set to can reach the 903# of resistance to ASTM oil, volume change≤30% of 150 DEG C of * 70h, firmness change value≤15HA, introduce nano-cerium oxide, the heat-proof aging auxiliary agent of iron oxide and phenyl-vinyl silicon oil composition improves the high temperature resistance of sizing material, it introduces by ethyl alcohol and 2, 5- dimethyl -2, the compression set regulator of 5- bishexane composition reduces compression set rate.
Description
Technical field
The present invention relates to a kind of automobile engine silicone rubber for sealing and preparation method, in particular to a kind of automobile engine
Sealing system liquid silastic and preparation method thereof.
Background technique
With the development of modern automobile industry and the improvement of people's living standards, people to the maneuverability of automobile, safety,
The requirement of comfort and the feature of environmental protection is higher and higher." heart " of the engine as automobile, decides the performance of automobile, therefore to it
The performance requirement of spare and accessory parts is very high.The sealing system of automobile engine is in oil and gas environments, is mixed with fuel oil, and
Engine can generate a large amount of heat during running at high speed, and be easy to cause the operating temperature in small space to increase, sometimes
Temperature is even as high as 200 ~ 250 DEG C.Therefore under such working environment, the material in automobile engine is applied just to need together
When have good oil resistivity and heat resistance (250 DEG C or less high temperature).
It is rapid with silicon rubber in recent years it is well known that sealing element is generally all by having the rubber production of certain elasticity
Development and its excellent temperature tolerance (200 DEG C or less long-time services), now sealing element on most of automobiles is all made by silicon rubber
It is produced for raw material.Sealing element is when in use, it will usually by compression 20% ~ 30%, guarantee the leakproofness of machine with this, this is to material
The compressive deformation of material at high temperature proposes requirement.If deformation is excessive, situations such as being easy to cause leakage appearance.
Therefore, automobile engine sealing system just must simultaneously have good oil resistivity, heat resistance with liquid silastic
(it is small that deformation is used for a long time) in (250 DEG C or less high temperature) and low compression set performance, but liquid silastic domestic at present
Performance more than not having simultaneously.
Summary of the invention
The purpose of the present invention is to provide a kind of automobile engine sealing system liquid silastic and preparation method thereof, tools
Have and can satisfy car engine seal simultaneously to the high performance requirements of oil resistivity, heat resistant and low compression set
The advantages of, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: a kind of automobile engine sealing system liquid silicon
Rubber, including following raw material: resistance to oil assistant, heat-proof aging auxiliary agent and compression set regulator, resistance to oil assistant is by magnesium, calcium silicon
Hydrochlorate and long chain vinyl radical siloxane composition；Wherein, magnesium, calcium-silicate and 70 parts ~ 90 parts long-chain second that content is 10 parts ~ 30 parts
Alkenyl siloxane；Heat-proof aging auxiliary agent is made of nano-cerium oxide, iron oxide and phenyl-vinyl silicon oil, and content is 20 parts ~ 40
Part nano-cerium oxide, iron oxide and 60 parts ~ 80 parts phenyl-vinyl silicon oils；Compression set regulator is by ethyl alcohol and 2, and 5 ~ bis-
Methyl ~ 2,5 ~ bishexane composition, 90 parts of ethyl alcohol and 10 part 2,5 ~ dimethyl ~ 2,5 ~ bishexane.
Further, the viscosity of long chain vinyl radical siloxane is 5000mpacs, the vinyl in phenyl-vinyl silicon oil
Molar content 0.1% ~ 1.0%, phenyl molar content 30%, 3000 ~ 10000cs of viscosity, ethyl alcohol are 95% concentration.
Further, magnesium, calcium-silicate and 75 parts ~ 85 parts long chain vinyl radical siloxanes that content is 15 parts ~ 25 parts；Content
For 25 parts ~ 35 parts nano-cerium oxides, iron oxide and 65 parts ~ 75 parts phenyl-vinyl silicon oils；90 parts of ethyl alcohol and 10 part 2,5 ~ bis-
Methyl ~ 2,5 ~ bishexane.
Further, magnesium, calcium-silicate and 80 parts of long chain vinyl radical siloxanes that content is 20 parts；Content is 30 parts of nanometers
Cerium oxide, iron oxide and 70 parts of phenyl-vinyl silicon oils；90 parts of ethyl alcohol and 10 part 2,5 ~ dimethyl ~ 2,5 ~ bishexane.
The present invention also provides a kind of preparation methods of automobile engine sealing system liquid silastic, including following step
It is rapid:
S1: preparation of liquid silicone rubber base-material；
S11:100 parts of α, ω ~ divinyl polydimethylsiloxane, 30 ~ 60 parts of gas-phase silica, 5 ~ 20 parts of hexamethyls two
Silazane, 1 ~ 4 part of water mix in vacuum kneader；
S12: after the sizing material in kneader is stirred 2 hours at normal temperature, 4 ~ 6 hours are stood；
S13: 150 DEG C ~ 170 DEG C are warming up to, heating stirring 2 hours, is cooled down after vacuum takes off low 2 hours；S14: will be after cooling
The polished base-material for obtaining liquid silastic of sizing material；
S2: preparing resistance to oil assistant, heat-proof aging auxiliary agent and compression set regulator, and above-mentioned raw material pass through mixer respectively
Room temperature is uniformly mixed and forms；
S3: in the base-material of 100 parts of aforesaid liquid silicon rubber, 2 ~ 6 parts of end-vinyl Polymethyl methacrylates of addition, 4 ~ 8
The resistance to oil assistant of part, 2 ~ 5 parts of heat-proof aging auxiliary agents, 0.05 ~ 0.1 part 2% of isopropyl alcohol solution of chloroplatinic acid stir in planetary mixer
After mixing uniformly, de-bubbled, filtering can obtain component A；
S4: in the base-material of 100 parts of aforesaid liquid silicon rubber, 2 ~ 10 parts of end-vinyl Polymethyl methacrylates of addition, 3 ~ 6
Part compression set regulator, 1 ~ 6 part of polymethyl hydrogen siloxane, 0.04 ~ 0.1 part of 1 ~ acetenyl ~ 1 ~ cyclohexanol, in planet
In blender after mixing evenly, de-bubbled, filtering can obtain component B；
S5: component A is uniformly mixed with component B according to 1: 1 quality proportioning, is injected into mold, is heating and curing and generates liquid
Silastic material.
Further, standing for S12 can be such that hexamethyldisilazane and its hydrolysate is unlikely to by mistake for a period of time
Early evaporates, and the hydroxyl of gas-phase silica can be made adequately to be handled.
Compared with prior art, the oil resistant that the present invention is formed by introducing magnesium, calcium-silicate and long chain vinyl radical siloxane
Auxiliary agent improves the oil resistance of sizing material, so that its oil-resistant effect is can reach the 903# of resistance to ASTM oil, the volume change of 150 DEG C of * 70h
Rate≤30%, firmness change value≤15HA introduce the heat-proof aging of nano-cerium oxide, iron oxide and phenyl-vinyl silicon oil composition
Auxiliary agent improves the high temperature resistance of sizing material, introduces by ethyl alcohol and 2, the compression of 5- dimethyl -2,5- bishexane composition permanently becomes
Shape regulator reduces compression set rate.
Specific embodiment
Technical solution of the present invention progress is described clear and completely below in conjunction with embodiment.Obviously, described reality
Applying example is only a part of the embodiment of the present invention, and instead of all the embodiments, based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without making creative work belongs to what the present invention protected
Range.
A kind of automobile engine sealing system liquid silastic, including following raw material: resistance to oil assistant, heat-proof aging auxiliary agent
With compression set regulator, resistance to oil assistant is made of magnesium, calcium-silicate and long chain vinyl radical siloxane, content be 10 parts ~
30 parts of magnesium, calcium-silicate and 70 parts ~ 90 parts long chain vinyl radical siloxanes；Heat-proof aging auxiliary agent is by nano-cerium oxide, iron oxide
It is formed with phenyl-vinyl silicon oil, content is 20 parts ~ 40 parts nano-cerium oxides, iron oxide and 60 parts ~ 80 parts phenyl vinyl silicon
Oil；Compression set regulator is by ethyl alcohol and 2,5 ~ dimethyl ~ 2,5 ~ bishexane composition, 90 parts of ethyl alcohol and 10 part 2, and 5 ~ bis-
Methyl ~ 2,5 ~ bishexane.
Viscosity 5000mpacs of long chain vinyl radical siloxane or so, the vinyl mole in phenyl-vinyl silicon oil contain
Amount 0.1% ~ 1.0%, phenyl molar content 30%, 3000 ~ 10000cs of viscosity, ethyl alcohol are 95% concentration.
Magnesium, calcium-silicate and 75 parts ~ 85 parts long chain vinyl radical siloxanes that content is 15 parts ~ 25 parts；Content is 25 parts ~ 35
Part nano-cerium oxide, iron oxide and 65 parts ~ 75 parts phenyl-vinyl silicon oils；90 parts of ethyl alcohol and 10 part 2,5 ~ dimethyl ~ 2,5 ~
Bishexane.
Magnesium, calcium-silicate and the 80 parts of long chain vinyl radical siloxanes that content is 20 parts；Content is 30 parts of nano-cerium oxides, oxygen
Change iron and 70 parts of phenyl-vinyl silicon oils；90 parts of ethyl alcohol and 10 part 2,5 ~ dimethyl ~ 2,5 ~ bishexane.
The preparation method of the automobile engine sealing system liquid silastic, comprising the following steps:
Step 1: preparation of liquid silicone rubber base-material；
Step 1: 100 parts of α, ω ~ divinyl polydimethylsiloxane, 30 ~ 60 parts of gas-phase silica, 5 ~ 20 parts of pregnancy
Base disilazane, 1 ~ 4 part of water mix in vacuum kneader；
Step 2: 4 ~ 6 hours are stood after the sizing material in kneader is stirred 2 hours at normal temperature, when standing one section for S12
Between hexamethyldisilazane and its hydrolysate can be made to be unlikely to be evaporated by premature, the hydroxyl of gas-phase silica can be made to obtain
Adequately processing, to promote the dispersion and infiltration between silicone oil and gas-phase silica, is substantially reduced the viscosity of base-material；
Step 3: 150 DEG C ~ 170 DEG C are warming up to, it is heating stirring 2 hours, cooling after vacuum takes off low 2 hours；
Step 4: by the polished base-material for obtaining liquid silastic of sizing material after cooling；
Step 2: preparing resistance to oil assistant, heat-proof aging auxiliary agent and compression set regulator, and above-mentioned raw material pass through close respectively
Mill room temperature is uniformly mixed and forms；
Step 3: in the base-material of 100 parts of aforesaid liquid silicon rubber, adding 2 ~ 6 parts of end-vinyl Polymethyl methacrylates,
4 ~ 8 parts of resistance to oil assistants, 2 ~ 5 parts of heat-proof aging auxiliary agents, 0.05 ~ 0.1 part 2% of isopropyl alcohol solution of chloroplatinic acid, in planetary mixer
In after mixing evenly, de-bubbled, filtering can obtain component A；
Step 4: in the base-material of 100 parts of aforesaid liquid silicon rubber, the poly- methyl ethylene silicon oxygen of 2 ~ 10 parts of end-vinyls is added
Alkane, 3 ~ 6 parts of compression set regulators, 1 ~ 6 part of polymethyl hydrogen siloxane, 0.04 ~ 0.1 part of 1 ~ acetenyl ~ 1 ~ cyclohexanol,
In planetary mixer after mixing evenly, de-bubbled, filtering can obtain component B.
Step 5: component A is uniformly mixed with component B according to 1: 1 quality proportioning, is injected into mold, be heating and curing and
Generate liquid silicon rubber material.
Embodiment one:
Liquid silastic base-material: vinyl molar content is 0.2%, the α, ω-two that the viscosity at 25 DEG C is 50000mPas
100 parts of vinyldimethicone, 35 parts of the gas-phase silica of BET specific surface area 300,9 parts of hexamethyldisilazane, water
2 parts.
Component A: 100 parts of base-material, vinyl molar content are 5%, the end second that the viscosity at 25 DEG C is 20000mPas
2 parts of alkenyl Polymethyl methacrylate, 7 parts of resistance to oil assistant, 4 parts of heat-proof aging auxiliary agent, 2% chloroplatinic acid aqueous isopropanol
0.06 part.
Component B: 100 parts of base-material, vinyl molar content are 2%, the end second that the viscosity at 25 DEG C is 20000mPas
4 parts of alkenyl Polymethyl methacrylate, 3 parts of compression set regulator, hydrogen content 0.5%, the viscosity at 25 DEG C are
0.08 part of cyclohexanol of 3 parts of polymethyl hydrogen siloxane, the 1- acetenyl -1- of 50cs.
By the raw material of above-mentioned base-material investment kneader not higher than 80 DEG C at a temperature of stir evenly, wherein gas-phase silica
Divide 6 investment kneaders；After sizing material in kneader is stirred 2 hours at normal temperature, 6 hours are stood；It is warming up to 160 DEG C of left sides
The right side, it is heating stirring 2 hours, cooling after vacuum takes off low 2 hours；By the polished liquid silastic that obtains of sizing material after cooling
Base-material.
The raw material of said components A and component B are put into the planetary mixer of A and B respectively, are stirred evenly 1 hour or so,
De-bubbled, filtering can obtain component A and two component of component B, A and B and be uniformly mixed with 1:1 ratio, the obtained sizing material of heating vulcanization
Main performance index such as following table.
Conditions of vulcanization is 130 DEG C, 10min.
Embodiment two:
Liquid silastic base-material: vinyl molar content is 0.3%, the α, ω-two that the viscosity at 25 DEG C is 20000mPas
100 parts of vinyldimethicone, 45 parts of the gas-phase silica of BET specific surface area 300,12 parts of hexamethyldisilazane,
3 parts of water.
Component A: 100 parts of base-material, vinyl molar content are 10%, the end second that the viscosity at 25 DEG C is 3000mPas
5 parts of alkenyl Polymethyl methacrylate, 5 parts of resistance to oil assistant, 3 parts of heat-proof aging auxiliary agent, 2% chloroplatinic acid aqueous isopropanol 0.1
Part.
Component B: 100 parts of base-material, vinyl molar content are 10%, the end second that the viscosity at 25 DEG C is 3000mPas
5 parts of alkenyl Polymethyl methacrylate, 5 parts of compression set regulator, hydrogen content 0.8%, the viscosity at 25 DEG C are
0.05 part of cyclohexanol of 5 parts of polymethyl hydrogen siloxane, the 1- acetenyl -1- of 80cs.
By the raw material of above-mentioned base-material investment kneader not higher than 80 DEG C at a temperature of stir evenly, wherein gas-phase silica
Divide 7 investment kneaders；After sizing material in kneader is stirred 2 hours at normal temperature, 6 hours are stood；It is warming up to 160 DEG C of left sides
The right side, it is heating stirring 2 hours, cooling after vacuum takes off low 2 hours；By the polished liquid silastic that obtains of sizing material after cooling
Base-material.
The raw material of said components A and component B are put into the planetary mixer of A and B respectively, are stirred evenly 1 hour or so,
De-bubbled, filtering can obtain component A and component B.Two component of A/B is uniformly mixed with 1:1 ratio, the obtained sizing material master of heating vulcanization
Want performance indicator such as following table.
Embodiment three:
Liquid silastic base-material: vinyl molar content is 0.23%, the α, ω-two that the viscosity at 25 DEG C is 50000mPas
100 parts of vinyldimethicone, 40 parts of the gas-phase silica of BET specific surface area 300,11 parts of hexamethyldisilazane,
2.8 parts of water.
Component A: 100 parts of base-material, vinyl molar content are 5%, the end second that the viscosity at 25 DEG C is 20000mPas
3 parts of alkenyl Polymethyl methacrylate, 6 parts of resistance to oil assistant, 2 parts of heat-proof aging auxiliary agent, 2% chloroplatinic acid aqueous isopropanol
0.08 part.
Component B: 100 parts of base-material, vinyl molar content are 10%, the end second that the viscosity at 25 DEG C is 3000mPas
3 parts of alkenyl Polymethyl methacrylate, 4 parts of compression set regulator, hydrogen content 0.8%, the viscosity at 25 DEG C are
0. 06 parts of cyclohexanol of 4 parts of polymethyl hydrogen siloxane, the 1- acetenyl -1- of 80cs.
By the raw material of above-mentioned base-material investment kneader not higher than 80 DEG C at a temperature of stir evenly, wherein gas-phase silica
Divide 7 investment kneaders；After sizing material in kneader is stirred 2 hours at normal temperature, 6 hours are stood；It is warming up to 160 DEG C of left sides
The right side, it is heating stirring 2 hours, cooling after vacuum takes off low 2 hours；By the polished liquid silastic that obtains of sizing material after cooling
Base-material.
The raw material of said components A and component B are put into the planetary mixer of A and B respectively, are stirred evenly 1 hour or so,
De-bubbled, filtering can obtain component A and component B.Two component of A/B is uniformly mixed with 1:1 ratio, the obtained sizing material master of heating vulcanization
Want performance indicator such as following table.
Conditions of vulcanization is 130 DEG C, 10min.
The present invention improves sizing material by introducing the resistance to oil assistant of magnesium, calcium-silicate and long chain vinyl radical siloxane composition
Oil resistance makes its oil-resistant effect can reach purpose, and heat-proof aging auxiliary agent improves the high temperature resistance of sizing material, reduces compression forever
Long deformation rate.
In conclusion this automobile engine sealing system liquid silastic and preparation method thereof, by introducing magnesium, calcium silicon
The resistance to oil assistant of hydrochlorate and long chain vinyl radical siloxane composition improves the oil resistance of sizing material, can reach its oil-resistant effect resistance to
ASTM 903# oil, volume change≤30% of 150 DEG C of * 70h, firmness change value≤15HA introduce nano-cerium oxide, iron oxide
The high temperature resistance of sizing material is improved with the heat-proof aging auxiliary agent of phenyl-vinyl silicon oil composition, is introduced by ethyl alcohol and 2,5- diformazan
The compression set regulator of base -2,5- bishexane composition reduces compression set rate.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of automobile engine sealing system liquid silastic, including following raw material according to the mass fraction: resistance to oil assistant,
Heat-proof aging auxiliary agent and compression set regulator, resistance to oil assistant are made of magnesium, calcium-silicate and long chain vinyl radical siloxane；
Wherein, magnesium, calcium-silicate and 70 parts ~ 90 parts long chain vinyl radical siloxanes that content is 10 parts ~ 30 parts；Heat-proof aging auxiliary agent
It is made of nano-cerium oxide, iron oxide and phenyl-vinyl silicon oil, content is 20 parts ~ 40 parts nano-cerium oxides, iron oxide and 60
Part ~ 80 parts of phenyl-vinyl silicon oils；Compression set regulator is made of ethyl alcohol and 2,5 ~ dimethyl ~ 2,5 ~ bishexane, and 90
Part ethyl alcohol and 10 part 2,5 ~ dimethyl ~ 2,5 ~ bishexane.
2. a kind of automobile engine sealing system liquid silastic according to claim 1, it is characterised in that: long-chain second
The viscosity of alkenyl siloxane is 5000mpacs, the vinyl molar content 0.1% ~ 1.0% in phenyl-vinyl silicon oil, phenyl
Molar content 30%, 3000 ~ 10000cs of viscosity, ethyl alcohol are 95% concentration.
3. a kind of automobile engine sealing system liquid silastic according to claim 1, it is characterised in that: content is
15 parts ~ 25 parts of magnesium, calcium-silicate and 75 parts ~ 85 parts long chain vinyl radical siloxanes；Content be 25 parts ~ 35 parts nano-cerium oxides,
Iron oxide and 65 parts ~ 75 parts phenyl-vinyl silicon oils；90 parts of ethyl alcohol and 10 part 2,5 ~ dimethyl ~ 2,5 ~ bishexane.
4. a kind of automobile engine sealing system liquid silastic according to claim 1, it is characterised in that: content is
20 parts of magnesium, calcium-silicate and 80 parts of long chain vinyl radical siloxanes；Content is 30 parts of nano-cerium oxides, iron oxide and 70 parts of phenyl
Vinyl silicone oil；90 parts of ethyl alcohol and 10 part 2,5 ~ dimethyl ~ 2,5 ~ bishexane.
5. a kind of preparation method of automobile engine sealing system liquid silastic as described in claim 1, feature exist
In, comprising the following steps:
S1: preparation of liquid silicone rubber base-material；
S11:100 parts of α, ω ~ divinyl polydimethylsiloxane, 30 ~ 60 parts of gas-phase silica, 5 ~ 20 parts of hexamethyls two
Silazane, 1 ~ 4 part of water mix in vacuum kneader；
S12: after the sizing material in kneader is stirred 2 hours at normal temperature, 4 ~ 6 hours are stood；
S13: 150 DEG C ~ 170 DEG C are warming up to, heating stirring 2 hours, is cooled down after vacuum takes off low 2 hours；S14: will be after cooling
The polished base-material for obtaining liquid silastic of sizing material；
S2: preparing resistance to oil assistant, heat-proof aging auxiliary agent and compression set regulator, and above-mentioned raw material pass through mixer respectively
Room temperature is uniformly mixed and forms；
S3: in the base-material of 100 parts of aforesaid liquid silicon rubber, 2 ~ 6 parts of end-vinyl Polymethyl methacrylates of addition, 4 ~ 8
The resistance to oil assistant of part, 2 ~ 5 parts of heat-proof aging auxiliary agents, 0.05 ~ 0.1 part 2% of isopropyl alcohol solution of chloroplatinic acid stir in planetary mixer
After mixing uniformly, de-bubbled, filtering can obtain component A；
S4: in the base-material of 100 parts of aforesaid liquid silicon rubber, 2 ~ 10 parts of end-vinyl Polymethyl methacrylates of addition, 3 ~ 6
Part compression set regulator, 1 ~ 6 part of polymethyl hydrogen siloxane, 0.04 ~ 0.1 part of 1 ~ acetenyl ~ 1 ~ cyclohexanol, in planet
In blender after mixing evenly, de-bubbled, filtering can obtain component B；
S5: component A is uniformly mixed with component B according to 1: 1 quality proportioning, is injected into mold, is heating and curing and generates liquid
Silastic material.
6. a kind of preparation method of automobile engine sealing system liquid silastic as claimed in claim 5, feature exist
In for S12, standing can make hexamethyldisilazane and its hydrolysate be unlikely to be evaporated by premature for a period of time, can
Handle the hydroxyl of gas-phase silica adequately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811600943.2A CN109666301A (en) | 2018-12-26 | 2018-12-26 | A kind of automobile engine sealing system liquid silastic and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811600943.2A CN109666301A (en) | 2018-12-26 | 2018-12-26 | A kind of automobile engine sealing system liquid silastic and preparation method thereof |
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| CN109666301A true CN109666301A (en) | 2019-04-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423472A (en) * | 2019-08-22 | 2019-11-08 | 新安天玉有机硅有限公司 | A kind of anti-pollution type silicon rubber and preparation method thereof |
| WO2021160238A1 (en) | 2020-02-10 | 2021-08-19 | Wacker Chemie Ag | Silicone rubber compositions and their vulcanizates for use in potable water applications |
-
2018
- 2018-12-26 CN CN201811600943.2A patent/CN109666301A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423472A (en) * | 2019-08-22 | 2019-11-08 | 新安天玉有机硅有限公司 | A kind of anti-pollution type silicon rubber and preparation method thereof |
| WO2021160238A1 (en) | 2020-02-10 | 2021-08-19 | Wacker Chemie Ag | Silicone rubber compositions and their vulcanizates for use in potable water applications |
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Application publication date: 20190423 |
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