CN106317904A - Sealing pad for engines - Google Patents
Sealing pad for engines Download PDFInfo
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- CN106317904A CN106317904A CN201610812748.0A CN201610812748A CN106317904A CN 106317904 A CN106317904 A CN 106317904A CN 201610812748 A CN201610812748 A CN 201610812748A CN 106317904 A CN106317904 A CN 106317904A
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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
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
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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
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Abstract
The invention discloses a sealing pad for engines. The sealing pad is made of liquid silicone rubber. The liquid silicone rubber comprises, by weight, 90-100 parts of vinyl-terminated silicone oil, 30-50 parts of silicon dioxide particles, 2-4 parts of modified rare earth oxide powder, 2-10 parts of vinyl MQ resin, 0.05-0.12 part of modified immobilized complex platinum catalysts, 1.3-2 parts of hydrogen-containing silicone oil and 0.1-0.4 part of acetenyl cyclohexanol. The sealing pad for the engines has the advantages that the silicon dioxide particles and the modified rare earth oxide powder are added into the liquid silicone rubber on the premise that the excellent comprehensive performance is kept, accordingly, the structure and the service performance of the sealing pad can be improved, problems of corrosive adhesion, low fatigue resistance, insufficient abrasion resistance and the like of existing silicone rubber sealing pads can be solved, and the sealing pad is particularly applicable to sealing radiators and cooling circuits of the engines.
Description
Technical field
The present invention relates to electromotor encapsulant field, seal particularly to a kind of engine radiator and cooling circuit
Pad.
Background technology
Electromotor is the heart of automobile, and engine performance is one of crucial assembly of automotive performance quality.And electromotor
Overall performance level is made up of the Effec-tive Function of each circulating system, and wherein Sealing Technology is the base of each circulating system
This performance assessment criteria.Sealing Technology relates to the aspects such as encapsulant, structure design and production technology, these three side to be handled well
Face, sealing surface situation to be paid close attention to, the operating mode of electromotor and assembly technology etc..Will be the Sealing Technology problem of whole electromotor
Resolve it is necessary to the base regime that runs of the seal member of understanding deeply electromotor, including bolt torque, bolt hole away from distribution,
Use the pressure distribution of temperature, sealing medium, sealing surface and assembly technology etc..Thus to sealing the design of structure, the choosing of encapsulant
Material, performance indications and moulding process be assured that.Such as outlet pipe sealing gasket or radiator, not only want body-sealing
Lubricating oil aqueous cooling solution to be sealed, and long-term temperature herein is at 90 ~ 110 DEG C, therefore it is required that sealing gasket not only wants resistance to machine
Oiliness also wants the corrosion of the ethylene glycol in the water of resistance to cooling, and wants the test that long-term heatproof is aging.For common asbestos material
Not only can not meet the requirement of this operating mode, and body can be corroded by the chlorine magnesium ion precipitation in asbestos, cause viscous cylinder not
Easily change, and long-term ageing causes sealing surface inefficacy seepage.If using compound fiber and adding adding of grease proofing, water shutoff
The encapsulant adding agent can well solve the seal request at this position.
In the use of available engine sealing gasket, the sealing gasket of various kind occurs, has wherein combined with rubber gasket
Conjunction performance is optimal, uses the most on a large scale, and in rubber gasket, again with silicone rubber as main material, especially liquid silicon
The serviceability of rubber is optimal, and liquid silastic is compared to mixed milling type semisolid silicone rubber and common room temperature vulcanization one-component silicon
Glue, have good fluidity, sulfuration fast, can with moulding by casting, can with features such as injection mo(u)ldings, but, through actually used discovery,
Even if silicone rubber possesses combination property well, but it yet suffers from deformation ratio relatively greatly, and oil resistivity is poor, and body abutting edge is easy
Producing corrosive bond, sealing gasket is changed and is inconvenient to be easily generated sizing, the defects such as wearability is poor, meanwhile, and existing silicone rubber resistance to
High temperature, resistance to cryogen, ageing-resistant performance have much room for improvement, and fatigue resistance has to be strengthened, and these distinct issues all constrain silicon
The development of rubber gasket.The proximal segment time, watt gram chemical groups, on the international rubber technologies of Brazil in 2014 and equipment exhibition, is shown
Go out a kind of new liquid silicone rubber ELASTOSIL ® RT 728, the sealing gasket of this new liquid silicone rubber have high temperature resistant,
Resistance to coolant performance, it is possible to life-time service and deformation ratio are extremely low, it is adaptable to engine radiator and the sealing of cooling circuit, it is possible to
Solve major part problem present in existing silicone rubber seal gasket, but, due to watt gram chemical groups and to not specifically disclose this new
The formula of type liquid silastic, it does not the most claim that this product has higher fatigue resistance, elastic strength and wear-resisting simultaneously
Intensity, it is possible to solving corrosive bond problem, therefore, it is worth for how providing a kind of pad of engine possessing good combination property
The problem of research.
Summary of the invention
The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of electromotor sealing gasket, by multiple
Join a kind of liquid silicon rubber material used for sealing gasket, make silicone rubber seal gasket under keeping good combination property, solve existing
The problems such as silicone rubber seal gasket corrosive bond, fatigue resistance are the highest, wearability is not enough.
The technical solution used in the present invention is as follows: a kind of electromotor sealing gasket, and sealing gasket liquid silastic is made, institute
State liquid silastic to be made up of the material of following weight portion: vinyl-terminated silicone fluid 90-100 part, silica dioxide granule 30-50 part,
Modified RE oxide powder 2-4 part, vinyl MQ resin 2-10 part, modified immobilized cooperation platinum catalyst 0.05-0.12 part,
Containing hydrogen silicone oil 1.3-2 part, ethynylcyclohexanol 0.1-0.4 part.
Further, silica dioxide granule is made up of particle diameter 70-150 μm and the two kinds of specification mixing of particle diameter 200-400 μm, 70-
150 μm particle diameter silica dioxide granules and 200-400 μm particle diameter silica dioxide granule quality proportioning are 1:1.
As preferably, modified RE oxide is modified perovskite type rare-earth oxide, and perovskite type rare-earth aoxidizes
The particle diameter of thing is 0.5-3 μm.
Further, the mesh number of modified RE oxide powder is 50-100 mesh, and its preparation method is: with silane coupler in
At 70 DEG C, modified RE oxide powder in deionized water, reacts 7h.
Further, the preparation method of modified immobilized cooperation platinum catalyst is: take the Gd of design flow2O3Being dissolved in concentration is
In the HCl solution of 1.5mol/l, being subsequently adding Polyethylene Glycol, adding concentration after stirring and dissolving is 0.036mol/L chloroplatinic acid isopropyl
Being configured to mixed liquor in alcoholic solution, be subsequently adding silica gel, place 20h after stirring, then at 70 DEG C of decompression distillations, distillation is except water
After and get final product, wherein, Polyethylene Glycol and Gd2O3Mass ratio is 100-110:1, silica gel and Gd2O3Mass ratio be 180-210:1, Pt with
Gd mol ratio is 1:1.
Further, the preparation method of liquid silastic comprises the following steps:
Step 1, vinyl-terminated silicone fluid and silica dioxide granule, modified RE oxide powder and vinyl MQ resin are being mediated
Mix homogeneously in machine, obtains mixture；
After step 2, step 1 complete, in mixture, add immobilized cooperation platinum catalyst stir, add acetenyl hexamethylene
Alcohol, is stirring evenly and then adding into containing hydrogen silicone oil mix homogeneously, then places into vacuum tank froth breaking or standing obtains solution；
Step 3, being subsequently poured in pump installation by solution, solution is pumped in the injection barrel of injection molding machine by pump installation, then carries out
Injection moulding, obtains liquid silastic sealing gasket.
As alternative, the preparation method of liquid silastic comprises the following steps:
Step 1, vinyl-terminated silicone fluid and silica dioxide granule, modified RE oxide powder and vinyl MQ resin are being mediated
Mix homogeneously in machine, then mixs homogeneously with ethynylcyclohexanol, obtains component A；
Step 2, by the containing hydrogen silicone oil of proportional quantity and the mixing of immobilized cooperation platinum catalyst, obtain component B；
Step 3, by component A and component B mix homogeneously, be then heating and curing, i.e. obtain liquid silastic.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, the silica dioxide granule of two kinds of specifications solves the problem that liquid silastic corrodes bonding body, it is ensured that cabinet size
Integrity, make body cleaned and changed more convenient；
2, modified immobilized cooperation platinum catalyst can improve the selectivity of principal product, principal product yield can also be made to obtain simultaneously
To ensureing, and react highly stable, inhibit the generation of side reaction to a certain extent；
3, the rare earth ion in rare earth oxide after dispersed can be combined with crack tip free radical, forms new crosslinking,
The extension making crackle is effectively stopped, and have ceased the chain reaction that free radical causes simultaneously, improves the anti-of liquid silastic
Fatigue strength, decreases the generation of crackle, can also significantly strengthen the oxidation resistance of immobilized cooperation platinum catalyst simultaneously, enter one
Step reduces the risk of immobilized cooperation Pt catalyst poisoning；
4, the engine radiator gasket seal of the present invention has coolant high temperature resistant, resistance to and high resilience performance, for a long time
Also can keep extremely low compression deformation rate after bearing load, thus sealing property is excellent；
5, the preparation method simple and flexible of the gasket seal of the present invention, both can carry out injection moulding and prepare, it is possible to carry out double-component
Preparation, product has shearing detailed performance, wide adaptability, it is easy to form large-scale production.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
Embodiment one
A kind of electromotor sealing gasket, sealing gasket liquid silastic makes, and described liquid silastic is by the thing of following weight portion
Material composition: vinyl-terminated silicone fluid 90 parts, silica dioxide granule 30 parts, modified RE oxide powder 2 parts, vinyl MQ resin 10
Part, the immobilized cooperation platinum catalyst 0.05 part of modification, containing hydrogen silicone oil 2 parts, ethynylcyclohexanol 0.1 part.
In above-mentioned, vinyl-terminated silicone fluid can be vinyl silicone oil RH-302(contents of ethylene be 0.1 wt %, viscosity is
20000mpa s), vinyl silicone oil RH-303(contents of ethylene be 0.12 wt %, viscosity is 10000 mpa s) or
VPDMS(contents of ethylene is 0.23 wt %, and viscosity is 2000mpa s) etc., preferably vinyl silicone oil RH-303.
Silica dioxide granule is made up of particle diameter 70-150 μm and the two kinds of specification mixing of particle diameter 200-400 μm, 70-150 μm grain
Footpath silica dioxide granule and 200-400 μm particle diameter silica dioxide granule quality proportioning are 1:1；Silicon dioxide is filled out as half reinforcement
Material, has the good compatibility with silicone rubber matrix, can improve thermal conductance and the heat stability of silicone rubber, and then reduce silicon
The decomposition of elastomeric material and the formation speed of carbonization passage, meanwhile, silicon dioxide itself is a kind of high-abrasive material, it is possible to strengthen silicon
The anti-wear performance of rubber, but, simply as filler in existing silicone rubber, it is not to silicon dioxide in addition abundant profit
With, in the present embodiment, silicon dioxide selects two kinds of specifications to add in silicone rubber as filler, and cause is, greater particle size
Silica dioxide granule is filled in the silicon dioxide of greater particle size as main wear-resistant material, the silica dioxide granule of relatively small particle
Between granule, to increase the Hard Inclusion quantity in silicone rubber, silicone rubber is made to have preferably anti-wear performance, simultaneously as less
The sedimentation of the silica dioxide granule of particle diameter, makes the silica dioxide granule arrangement in silicone rubber the tightst, is being impacted
Time, the displacement space of abrasion resistant particles is less, abrasion resistant particles difficult drop-off, in other words, when silicone rubber pad is by long compressive
During with dynamic impulsion, the rubber part of silicone rubber gasket surface can wear and tear and expose silica dioxide granule, prominent dioxy
Silicon carbide particle can stop being further worn out of silicone rubber pad, in order to solve the rubber existed between the silica dioxide granule highlighted
Glue part occurs erosion bonding with body, makes except the silica dioxide granule that particle diameter is bigger carries out segmentation to the surface of silicone rubber pad
Can not be formed larger area bonding outside, the rubber areas that segmentation is formed by the less silica dioxide granule of particle diameter is carried out further
Segmentation, general performance is, the surface of silicone rubber pad will not occur bonding phenomenon with body when life-time service, and then ensure that
The integrity of cabinet size, cleaned and changed convenience.It addition, arrange close silica dioxide granule can also increase the bullet of silicone rubber
Property intensity, enables to bear bigger pressure, and produces minimum compressed shape variability, thus maintain sealing.
Modified RE oxide powder, owing to rare earth oxide particles powder is rigid material, it can make in silicone rubber
The elastic deformability of composite reduces, and elongation rate of tensile failure declines, and therefore, in field of liquid silicone rubber, technical staff is always
Being cautious use of very much rare earth oxide, in the present embodiment, rare earth oxide after modified, is dissolved in liquid silastic with caning be uniformly dispersed
In, when liquid silastic is because, during by repeated compression resilience, producing macromole free radical, and trigger molecule in liquid silastic
The oxidation of chain, and then make the fatigue resistance of liquid silastic reduce, its top layer will crack, dispersed after rare earth
Rare earth ion in oxide can be combined with crack tip free radical, forms new crosslinking, in making the extension of crackle obtain effectively
Only, stop the chain reaction that free radical causes simultaneously, i.e. improve the fatigue resistance of liquid silastic.Simultaneously as liquid silicon
In rubber, immobilized cooperation platinum catalyst easily reacts cause poisoning with N, P, S etc., and modified RE oxide powder uses calcium
Titanium ore type rare earth oxide, more specifically, use Sm0.5Sr0.5CoO3、La0.6Sr0.4Co0.8Fe0.2O3、Sr0.7Nd0.3CoO2.7、
Sr0.9Eu0.1CoO3Or La0.5Sr0.5FeO3Deng, these rare earth oxides have activity well, it is possible to be mixed in capture silicone rubber
N, P, S etc., and N, S etc. are discharged in gaseous form simultaneously, be a kind of efficiently, low cost, hydrogen reduction steady in a long-term and analysis
Oxygen catalysts, it is possible to significantly strengthen the oxidation resistance of immobilized cooperation platinum catalyst, further reduces immobilized cooperation platinum
The risk of catalyst poisoning.
Silica chain link in vinyl MQ resin has strengthening action to silicone rubber, the increase meeting of vinyl MQ resin consumption
Improving reaction enthalpy, temperature when making the initial cure temperature of silicone rubber and solidified raises, and Vinyl MQ silicon resin is as filling out
Material, compared with customary filler white carbon, in addition to can improving the mechanical property of silicone rubber, the outstanding advantages of vinyl MQ resin
It is not interfere with liquid silastic viscosity before curing, when vinyl silicone oil crosslinks curing reaction with containing hydrogen silicone oil,
Vinyl MQ resin is allowed to produce at uneven Concentrative crosslinking or multi-joint, and then forms a kind of Concentrative crosslinking network,
Playing the effect of regulation dispersion force, in the present embodiment, vinyl MQ resin is vinyl MQ resin RH-0826, its vinyl
Content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8.
Owing to existing custom catalysts mostly is homogeneous catalyst, such as chloroplatinic acid-divinyl tetramethyl disiloxane network
Compound (content of platinum is 3000ppm), homogeneous catalysis has more preferable reactivity, the shadow that reaction is not spread than heterogeneous catalysis
Ring.But it is more difficult to isolate homogeneous catalyst from reactant mixture, highly active metal complex homogeneous catalyst is in catalysis
During hydrosilylation of olefins, a large amount of reaction heat can be produced, be easily caused temperature of reaction system out of hand, and then make additive reaction
Isomerization reaction occurring, makes the selectivity of principal product reduce, therefore, the platinum catalyst of existing use is not that activity is the strongest more
Good.In order to make platinum catalyst have preferably catalysis activity and be easily recycled characteristic, use immobilized cooperation platinum catalyst, i.e. use
The immobilized technology of catalyst, obtains a kind of heterogeneous catalyst, is allowed to have concurrently homogeneously and the advantage of heterogeneous catalysis, meanwhile, for
The activity of further optimization immobilized cooperation platinum catalyst, is modified immobilized cooperation platinum catalyst, and the method for its modification is:
It is taken as the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 2mol/l, is subsequently adding Polyethylene Glycol, add after stirring and dissolving
Concentration is to be configured to mixed liquor in 0.038mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, places after stirring
24h, then at 70 DEG C of decompression distillations, after water is evaporated off and get final product, wherein, Polyethylene Glycol and Gd2O3Mass ratio is 100-110:1, silica gel with
Gd2O3Mass ratio be 180-210:1, Pt and Gd mol ratio be 1:1.Modified immobilized cooperation platinum catalyst can improve main product
The selectivity of thing, can also make principal product yield be guaranteed simultaneously, and react highly stable, inhibit pair to a certain extent
The generation of reaction.
Containing hydrogen silicone oil can be polydimethylsiloxane (active hydrogen content is 0.5 wt %), containing hydrogen silicone oil RH-H503(work
Property hydrogen content is 0.55wt%) and containing hydrogen silicone oil RH-H502(active hydrogen content be 0.75wt%) etc., preferably containing hydrogen silicone oil RH-
H503, its consumption is that 1.3:1 determines, i.e. according to formula: W according to silicon hydrogen-based in silico ethylene base mol ratioHand over=A(W1+W2)/(WH×
27), in formula, WHand overFor the quality of containing hydrogen silicone oil, W1For the quality of vinyl silicone oil, W2For the quality of vinyl MQ resin, WHFor handing over
The quality of H in connection agent, A be the mol ratio of Si-H and Si-Vi, i.e. A be 1.3.
The preparation method of above-mentioned electromotor liquid silastic sealing gasket comprises the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 107:1, silica gel and Gd2O3Mass ratio be 200:1, Pt and Gd mol ratio be 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 90 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
30 parts of silica dioxide granules, 2 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 10 parts of vinyl MQ resin RH-0826(second
Amount vinyl content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, obtain mixture；
After step 5, step 4 complete, in mixture, add 0.05 part of modified immobilized cooperation platinum catalyst stir, then
Adding 0.1 part of ethynylcyclohexanol, being stirring evenly and then adding into 2 parts of containing hydrogen silicone oil RH-503(active hydrogen content is 0.55wt%) mixed
Close uniformly, then place into vacuum tank froth breaking or standing obtains solution；
Step 6, being subsequently poured in pump installation by solution, solution is pumped in the injection barrel of injection molding machine by pump installation, then carries out
Injection moulding, the temperature that is heating and curing is 160 DEG C, obtains liquid silastic sealing gasket.
As a kind of alternative, the preparation method of aforesaid liquid silicone rubber seal gasket comprises the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 100-110:1, silica gel and Gd2O3Mass ratio is 180-210:1, Pt and Gd mol ratio
For 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 90 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
30 parts of silica dioxide granules, 2 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 10 parts of vinyl MQ resin RH-0826(second
Amount vinyl content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, then with 0.1 part of second
Alkynyl Hexalin mix homogeneously, obtains component A；
Step 5, by immobilized to 2 parts of containing hydrogen silicone oils and 0.05 part cooperation platinum catalyst mix, obtain component B；
Step 6, by component A and component B mix homogeneously, be then heating and curing, i.e. obtain liquid silastic.
Product above two method obtained surveys its property by experimental apparatus such as Material Creep Test machine, rotational rheometers
Can obtain, hardness is at more than 8HC, and breakdown strength, at more than 23KV/mm, has good self bonding performance, at-45 DEG C-200 DEG C
There is between temperature the impact of good high-low temperature resistant and low temperature flexibility, after soaking 1000h in the coolant of 100 DEG C, sample without
Substantially change, there is good oil resistivity, after carrying out the brute force attack of 10h at 100 DEG C, its compressed shape variability below 60%,
Testing stand table top does not occurs corroding viscose glue phenomenon, and the sample after test is without obvious rubber cracking and obscission.
Embodiment two
Embodiment two is identical with embodiment one, and its difference is, the electromotor preparation method of liquid silastic sealing gasket
Comprise the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 110:1, silica gel and Gd2O3Mass ratio be 180:1, Pt and Gd mol ratio be 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 95 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
38 parts of silica dioxide granules, 3 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 6 parts of vinyl MQ resin RH-0826(ethylene
Base content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, obtain mixture；
After step 5, step 4 complete, in mixture, add 0.06 part of modified immobilized cooperation platinum catalyst stir, then
Adding 0.15 part of ethynylcyclohexanol, being stirring evenly and then adding into 1.6 parts of containing hydrogen silicone oil RH-503(active hydrogen content is 0.55wt%)
Mix homogeneously, then places into vacuum tank froth breaking or standing obtains solution；
Step 6, being subsequently poured in pump installation by solution, solution is pumped in the injection barrel of injection molding machine by pump installation, then carries out
Injection moulding, the temperature that is heating and curing is 160 DEG C, obtains liquid silastic sealing gasket.
As a kind of alternative, the preparation method of above-mentioned electromotor liquid silastic sealing gasket comprises the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 110:1, silica gel and Gd2O3Mass ratio be 180:1, Pt and Gd mol ratio be 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 95 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
38 parts of silica dioxide granules, 3 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 6 parts of vinyl MQ resin RH-0826(ethylene
Base content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, then with 0.15 part of second
Alkynyl Hexalin mix homogeneously, obtains component A；
Step 5, by immobilized to 1.6 parts of containing hydrogen silicone oils and 0.06 part cooperation platinum catalyst mix, obtain component B；
Step 6, by component A and component B mix homogeneously, be then heating and curing, i.e. obtain liquid silastic.
Product above two method obtained surveys its property by experimental apparatus such as Material Creep Test machine, rotational rheometers
Can obtain, hardness is at more than 8HC, and breakdown strength, at more than 25KV/mm, has good self bonding performance, at-45 DEG C-200 DEG C
There is between temperature the impact of good high-low temperature resistant and low temperature flexibility, after soaking 1000h in the coolant of 100 DEG C, sample without
Substantially change, there is good oil resistivity, after carrying out the brute force attack of 10h at 100 DEG C, its compressed shape variability below 65%,
Testing stand table top does not occurs corroding viscose glue phenomenon, and the sample after test is without obvious rubber cracking and obscission.
Embodiment three
Embodiment two is identical with embodiment one, and its difference is, the electromotor preparation method of liquid silastic sealing gasket
Comprise the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 100:1, silica gel and Gd2O3Mass ratio be 210:1, Pt and Gd mol ratio be 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 100 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
50 parts of silica dioxide granules, 4 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 2 parts of vinyl MQ resin RH-0826(ethylene
Base content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, obtain mixture；
After step 5, step 4 complete, in mixture, add 0.12 part of modified immobilized cooperation platinum catalyst stir, then
Adding 0.4 part of ethynylcyclohexanol, being stirring evenly and then adding into 1.3 parts of containing hydrogen silicone oil RH-503(active hydrogen content is 0.55wt%)
Mix homogeneously, then places into vacuum tank froth breaking or standing obtains solution；
Step 6, being subsequently poured in pump installation by solution, solution is pumped in the injection barrel of injection molding machine by pump installation, then carries out
Injection moulding, the temperature that is heating and curing is 160 DEG C, obtains liquid silastic sealing gasket.
As a kind of alternative, the preparation method of above-mentioned electromotor liquid silastic sealing gasket comprises the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 100:1, silica gel and Gd2O3Mass ratio be 210:1, Pt and Gd mol ratio be 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 100 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
50 parts of silica dioxide granules, 4 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 2 parts of vinyl MQ resin RH-0826(ethylene
Base content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, then with 0.4 part of acetylene
Cyclohexanol mix homogeneously, obtains component A；
Step 5, by immobilized to 1.3 parts of containing hydrogen silicone oils and 0.12 part cooperation platinum catalyst mix, obtain component B；
Step 6, by component A and component B mix homogeneously, be then heating and curing, i.e. obtain liquid silastic.
Sealing gasket above two method obtained surveys it by experimental apparatus such as Material Creep Test machine, rotational rheometers
Performance obtains, and hardness at more than 25.3KV/mm, has good self bonding performance in more than 8HC, breakdown strength ,-45 DEG C-
There is between 200 DEG C of temperature good high-low temperature resistant impact and low temperature flexibility, after soaking 1000h in the coolant of 100 DEG C, examination
Sample, without substantially changing, has good oil resistivity, and after carrying out the brute force attack of 10h at 100 DEG C, its compressed shape variability is 58%
Hereinafter, testing stand table top does not occurs corroding viscose glue phenomenon, and the sample after test is without obvious rubber cracking and obscission.
Embodiment four
Embodiment four is identical with embodiment one, embodiment two and embodiment three, and its difference is, liquid silicon rubber used by electromotor
The preparation method of glue sealing gasket comprises the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 105:1, silica gel and Gd2O3Mass ratio be 190:1, Pt and Gd mol ratio be 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 98 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
40 parts of silica dioxide granules, 3 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 3 parts of vinyl MQ resin RH-0826(ethylene
Base content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, obtain mixture；
After step 5, step 4 complete, in mixture, add 0.09 part of modified immobilized cooperation platinum catalyst stir, then
Adding 0.2 part of ethynylcyclohexanol, being stirring evenly and then adding into 1.8 parts of containing hydrogen silicone oil RH-503(active hydrogen content is 0.55wt%)
Mix homogeneously, then places into vacuum tank froth breaking or standing obtains solution；
Step 6, being subsequently poured in pump installation by solution, solution is pumped in the injection barrel of injection molding machine by pump installation, then carries out
Injection moulding, the temperature that is heating and curing is 160 DEG C, obtains liquid silastic sealing gasket.
As a kind of alternative, the preparation method of electromotor liquid silastic sealing gasket comprises the following steps:
Step 1, with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, react 7h, obtain modification
RE oxide powder, standby；
Step 2, take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stirs
Adding concentration after mixing dissolving is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirring
Placing 20h after Jun Yun, then at 70 DEG C of decompression distillations, distillation is except obtaining modified immobilized cooperation platinum catalyst after water, standby；Its
In, Polyethylene Glycol and Gd2O3Mass ratio is 105:1, silica gel and Gd2O3Mass ratio be 190:1, Pt and Gd mol ratio be 1:1；
Step 3, by 70-150 μm particle diameter silicon dioxide silicon carbide particle and 200-400 μm particle diameter silica dioxide granule by quality proportioning
Relation for 1:1 prepares mixing silica dioxide granule, standby；
Step 4, being 1000mpa s by 98 parts of vinyl silicone oil RH-303(viscosity, contents of ethylene is 0.12wt%) and mixing
40 parts of silica dioxide granules, 3 parts of modified La0.6Sr0.4Co0.8Fe0.2O3Powder and 3 parts of vinyl MQ resin RH-0826(ethylene
Base content is 1.2wt%, and viscosity is 6630mpa s, and M/Q value is 0.8) mix homogeneously in kneader, then with 0.2 part of acetylene
Cyclohexanol mix homogeneously, obtains component A；
Step 5, by immobilized to 1.8 parts of containing hydrogen silicone oils and 0.09 part cooperation platinum catalyst mix, obtain component B；
Step 6, by component A and component B mix homogeneously, be then heating and curing, i.e. obtain liquid silastic sealing gasket.
Sealing gasket above two method obtained surveys it by experimental apparatus such as Material Creep Test machine, rotational rheometers
Performance obtains, and hardness at more than 24KV/mm, has good self bonding performance, at-45 DEG C-200 in more than 9HC, breakdown strength
There is between DEG C temperature good high-low temperature resistant impact and low temperature flexibility, after soaking 1000h in the coolant of 100 DEG C, sample
Without substantially changing, there is good oil resistivity, after carrying out the brute force attack of 10h at 100 DEG C, its compressed shape variability 62% with
Under, testing stand table top does not occurs corroding viscose glue phenomenon, and the sample after test is without obvious rubber cracking and obscission.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (7)
1. an electromotor sealing gasket, it is characterised in that sealing gasket liquid silastic is made, described liquid silastic by with
The material composition of lower weight portion: vinyl-terminated silicone fluid 90-100 part, silica dioxide granule 30-50 part, modified RE oxidate powder
End 2-4 part, vinyl MQ resin 2-10 part, modified immobilized cooperation platinum catalyst 0.05-0.12 part, containing hydrogen silicone oil 1.3-2 part,
Ethynylcyclohexanol 0.1-0.4 part.
2. electromotor sealing gasket as claimed in claim 1, it is characterised in that silica dioxide granule by particle diameter 70-150 μm and
Two kinds of specification mixing compositions of particle diameter 200-400 μm, 70-150 μm particle diameter silica dioxide granule and 200-400 μm particle diameter silicon dioxide
Granular mass proportioning is 1:1.
3. electromotor sealing gasket as claimed in claim 1, it is characterised in that modified RE oxide is modified calcium titanium
Ore deposit type rare earth oxide, the particle diameter of perovskite type rare-earth oxide is 0.5-3 μm.
4. electromotor sealing gasket as claimed in claim 1, it is characterised in that the mesh number of modified RE oxide powder is
50-100 mesh, its preparation method is: with silane coupler at 70 DEG C, modified RE oxide powder in deionized water, instead
Answer 7h.
5. electromotor sealing gasket as claimed in claim 1, it is characterised in that the preparation of modified immobilized cooperation platinum catalyst
Method is: take the Gd of design flow2O3It is dissolved in the HCl solution that concentration is 1.5mol/l, is subsequently adding Polyethylene Glycol, stir molten
Adding concentration after solution is to be configured to mixed liquor in 0.036mol/L isopropyl alcohol solution of chloroplatinic acid, is subsequently adding silica gel, stirs
Rear placement 20h, then at 70 DEG C of decompression distillations, distills after removing water and get final product, wherein, and Polyethylene Glycol and Gd2O3Mass ratio is 100-110:
1, silica gel and Gd2O3Mass ratio be 180-210:1, Pt and Gd mol ratio be 1:1.
6. the electromotor sealing gasket as described in one of claim 1-5, it is characterised in that the preparation method bag of liquid silastic
Include following steps:
Step 1, vinyl-terminated silicone fluid and silica dioxide granule, modified RE oxide powder and vinyl MQ resin are being mediated
Mix homogeneously in machine, obtains mixture；
After step 2, step 1 complete, in mixture, add immobilized cooperation platinum catalyst stir, add acetenyl hexamethylene
Alcohol, is stirring evenly and then adding into containing hydrogen silicone oil mix homogeneously, then places into vacuum tank froth breaking or standing obtains solution；
Step 3, being subsequently poured in pump installation by solution, solution is pumped in the injection barrel of injection molding machine by pump installation, then carries out
Injection moulding, obtains liquid silastic sealing gasket.
7. electromotor sealing gasket as claimed in claim 6, it is characterised in that the preparation method of liquid silastic includes following
Step:
Step 1, vinyl-terminated silicone fluid and silica dioxide granule, modified RE oxide powder and vinyl MQ resin are being mediated
Mix homogeneously in machine, then mixs homogeneously with ethynylcyclohexanol, obtains component A；
Step 2, by the containing hydrogen silicone oil of proportional quantity and the mixing of immobilized cooperation platinum catalyst, obtain component B；
Step 3, by component A and component B mix homogeneously, be then heating and curing, i.e. obtain liquid silastic.
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