CN109679165A - A kind of high conductive high strength electro-insulating rubber and preparation method thereof - Google Patents
A kind of high conductive high strength electro-insulating rubber and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to field of rubber technology, a kind of high conductive high strength electro-insulating rubber and preparation method thereof is disclosed.The high conductive high strength electro-insulating rubber comprises the following components in parts by weight: 50-200 parts of rubber raw rubber, 2-15 parts of activating agent, 50-200 parts of reinforcing filler, 2-30 parts of plasticizer, 50-300 parts of heat filling, 0.5-3 parts of surface treating agent and 1-5 parts of vulcanizing agent.The present invention is modified processing to conductive filler by adding surface treating agent, and preferred dosage of each component, rubber material thermal coefficient with higher obtained, and its volume resistance, tensile strength are not decreased obviously, are realized and are combined thermally conductive, insulation and physical property.
Description
Technical field
The present invention relates to field of rubber technology, and in particular to a kind of high conductive high strength electro-insulating rubber and preparation method thereof.
Background technique
Rubber is because of its good elasticity, insulating properties, air-tightness, and the characteristics of different rubber resistance to various media, it is military,
The fields such as automobile, mine, oil field, civil construction, water conservancy, medical treatment, electrical communications, style, daily necessity play important work
With.With the development of industrial information, to rubber, more stringent requirements are proposed, such as electronic component heat conductive rubber part,
While playing insulation, cushioning effect, good heat-conducting effect it is also desirable to have, to improve the heat dissipation problem of electronic component,
Keep its stable, improves service life.
In recent years, the research and application of heat conductive rubber have very much, improve generally by heat filling is filled in rubber
Its heating conduction.Heat conductive rubber can be divided by the heat filling type of filling: metal filled-type, metal oxide filled-type, gold
Belong to nitride filled-type, inorganic non-metallic filled-type and fiber filled-type thermally conductive rubber, heat filling usually just like aluminium, copper, iron,
Aluminium oxide, aluminium hydroxide, aluminium nitride, silicon nitride, graphite, carbon nanotube, carbon fiber, graphene etc..It is mainly adopted in industry at present
Use metal powder, metal oxide, metal hydroxides, graphite etc. as conductive filler material.
Electronic component it is also desirable to have good insulating properties with heat conductive rubber part, and rubber itself has insulating properties, but
It is that conductive filler material usually will affect its insulation performance.Such as metal powder, graphite, carbon fiber, carbon nanotube, carbon fiber are non-absolutely
The filler of edge type, can be improved the thermal conductivity of rubber material, but the insulating properties for also resulting in rubber material is substantially reduced, or even turn
It is turned into conductive material.It therefore, can be in the case where the working environment of heat conductive rubber is of less demanding for material electrical insulating property
Use above-mentioned filler；If requiring heat conductive rubber electrical insulating property with higher under the conditions of certain, above-mentioned packing material can not expire
Sufficient requirement.
The filler of insulated type heat conductive rubber mainly includes metal oxide such as BeO, MgO, AL2O3, CaO, NIO etc., metal nitrogen
Compound such as AlN, BN etc., carbide such as SiC, B4C3Deng.They have higher thermal coefficient, and compared with metal powder, there are also excellent
Electrical insulating property, therefore they can guarantee that final product has good electrical insulating property.However, with higher thermally conductive if you need to obtain
The heat conductive rubber of coefficient generally requires the additive amount for increasing filler in rubber material, and the adding too much of filler will lead to
The physical mechanical property of rubber material is substantially reduced, and the usability of rubber material is made to have a greatly reduced quality.Therefore, heat conductive rubber material is past
Toward causing its insulating properties or physical property to be decreased obviously while realizing high thermal conductivity, be difficult to realize combine it is thermally conductive, exhausted
Edge and physical property.
Summary of the invention
It is an object of the invention to provide a kind of high conductive high strength electro-insulating rubber in place of overcome the deficiencies in the prior art
And preparation method thereof, which has both good thermally conductive, insulation and physical mechanical property.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The present invention is modified processing, and preferred dosage of each component to conductive filler by adding surface treating agent, is made
High thermal conductivity rubber with good heating conduction.The thermal coefficient of the heat conductive rubber (is led much higher than the heat conductive silica gel of the industry
Hot coefficient is generally 0.8-3W/ (mK)), and compared with General Purpose Rubber material, volume resistance, tensile strength are without obvious
Decline realizes and combines thermally conductive, insulation and physical property, and cheap, and cost is far below addition carbon fiber, carbon nanometer
Pipe, graphene, aluminium nitride, boron nitride, boron carbide heat conductive rubber, have a vast market application prospect.
Formula of the invention is suitable for using nitrile rubber, EP rubbers, butadiene-styrene rubber or butadiene rubber as material of main part
Rubber material.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the rubber raw rubber is butyronitrile
At least one of rubber, EP rubbers, butadiene-styrene rubber, butadiene rubber；The activating agent be zinc oxide, magnesia, stearic acid,
At least one of polyethylene glycol, stearate.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the reinforcing filler is mine
Object filler.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the mineral filler is charcoal
At least one of black, white carbon black, diatomite, calcium silicates clay.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the plasticizer is that esters increase
Mould agent.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, ester plasticizer includes adjacent benzene
Diformazan dioctyl phthalate, dioctyl terephthalate, trioctyl trimellitate (TOTM), dioctyl sebacate, dioctyl adipate, ethanedioic acid
At least one of two (Butoxyethoxy second) esters.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the heat filling includes carbon
SiClx.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the heat filling is carbonization
The mixture of silicon and at least one of magnesia, aluminium oxide.
The present invention selects silicon carbide as main heat filling, the thermal coefficient of the rubber material greatly improved, and its body
Product resistivity remains at 1012Ω cm or more has both good insulation performance；At being modified to silicon carbide progress surface
Reason solves to be difficult to the dispersion in sizing material after silicon carbide is largely filled, avoids the properties for influencing rubber material.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the surfactant includes
At least one of ether surfactant, fatty acid soaps surfactant, amine ether surfactant, silane coupling agent.
Ether surfactant includes polypropylene glycol ether and polyglycol ether, fatty acid soaps surfactant in the present invention
Including at least one of stearate, eruciate, behenate；Amine ether surfactant includes single shea butter amidogen ether and double
Shea butter amidogen ether；Polyoxyethylene ester surfactant includes polyoxyethylene stearic acid ester；Silane coupling agent includes vinyl three
Ethoxysilane, vinyl three (b- methoxy ethoxy) silane, double-[γ-(triethoxysilicane) propyl] tetrasulfide, γ-
At least one of (the third oxygen of 2,3- epoxy), propyl trimethoxy silicane.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the vulcanizing agent is Sulfur sulphur
Change system, SE curing system or efficient vulcanization system vulcanizing agent.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the rubber further includes promoting
Agent, the promotor are at least one of tetramethylthiuram disulfide, N cyclohexyl 2 benzothiazole sulfenamide.
As the preferred embodiment of high conductive high strength electro-insulating rubber of the present invention, the rubber includes following heavy
Measure the component of part:
The present invention also provides the preparation methods of above-mentioned high conductive high strength electro-insulating rubber, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to required temperature, continues to stir 10min, is cooled to room temperature, obtains surface modification treatment
Heat filling；
(2) rubber raw rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler and plasticizer after mixing 2min again, and mixing is extremely
140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
The present invention carries out surface modification treatment to heat filling using surfactant in advance, can be improved heat filling and exists
It is physical to be difficult to the items dispersed and influence rubber in sizing material for dispersibility in sizing material after avoiding heat filling from largely filling
Energy.
Compared with prior art, the invention has the benefit that
The present invention is modified processing, and preferred dosage of each component to conductive filler by adding surface treating agent, is made
High thermal conductivity rubber with good heating conduction.Heat conductive rubber thermal coefficient with higher, and with common nitrile rubber
Material is compared, and volume resistance, tensile strength are not decreased obviously, is realized and is combined thermally conductive, insulation and physical property,
And it is cheap, cost is far below the thermally conductive rubber for adding carbon fiber, carbon nanotube, graphene, aluminium nitride, boron nitride, boron carbide
Glue has a vast market application prospect.
Specific embodiment
Purposes, technical schemes and advantages in order to better illustrate the present invention, below in conjunction with specific embodiment to the present invention
It further illustrates.It will be appreciated by those skilled in the art that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
In embodiment, used experimental method is conventional method unless otherwise specified, material used, reagent etc.,
It is commercially available unless otherwise specified.
Embodiment 1
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The preparation method of high conductive high strength electro-insulating rubber described in the present embodiment, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to 80~100 DEG C, continues to stir 10min, be cooled to room temperature, obtain surface it is modified at
The heat filling of reason；
(2) nitrile rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler, plasticizer and promotion after mixing 2min again
Agent, mixing to 140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
Nitrile rubber can be replaced with to EP rubbers, butadiene-styrene rubber, butadiene rubber in the present embodiment, can be also prepared
Take into account the heat conductive rubber of thermally conductive insulation and physical property.
Sulfur in the present embodiment can be replaced with SE curing system or efficient vulcanization system vulcanizing agent, not shadow
The thermally conductive and insulation performance that high conductive high strength electro-insulating rubber is prepared is rung, physical property is influenced also smaller.
Embodiment 2
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The preparation method of high conductive high strength electro-insulating rubber described in the present embodiment, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to 80~100 DEG C, continues to stir 10min, be cooled to room temperature, obtain surface it is modified at
The heat filling of reason；
(2) nitrile rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler, plasticizer and promotion after mixing 2min again
Agent, mixing to 140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
Embodiment 3
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The preparation method of high conductive high strength electro-insulating rubber described in the present embodiment, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to 80~100 DEG C, continues to stir 10min, be cooled to room temperature, obtain surface it is modified at
The heat filling of reason；
(2) nitrile rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler, plasticizer and promotion after mixing 2min again
Agent, mixing to 140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
Embodiment 4
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The preparation method of high conductive high strength electro-insulating rubber described in the present embodiment, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to 80~100 DEG C, continues to stir 10min, be cooled to room temperature, obtain surface it is modified at
The heat filling of reason；
(2) nitrile rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler, plasticizer and promotion after mixing 2min again
Agent, mixing to 140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
Embodiment 5
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The preparation method of high conductive high strength electro-insulating rubber described in the present embodiment, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to 80~100 DEG C, continues to stir 10min, be cooled to room temperature, obtain surface it is modified at
The heat filling of reason；
(2) nitrile rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler, plasticizer and promotion after mixing 2min again
Agent, mixing to 140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
Embodiment 6
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The preparation method of high conductive high strength electro-insulating rubber described in the present embodiment, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to 80~100 DEG C, continues to stir 10min, be cooled to room temperature, obtain surface it is modified at
The heat filling of reason；
(2) nitrile rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler, plasticizer and promotion after mixing 2min again
Agent, mixing to 140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
Comparative example 1
A kind of high conductive high strength electro-insulating rubber, comprises the following components in parts by weight:
The preparation method of high conductive high strength electro-insulating rubber described in the present embodiment, comprising the following steps:
(1) weigh heat filling and surface treating agent in proportion, and heat filling be put into mixing machine, start blender with
The revolving speed of 100~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to 80~100 DEG C, continues to stir 10min, be cooled to room temperature, obtain surface it is modified at
The heat filling of reason；
(2) nitrile rubber is first plasticated 2min, then successively puts into the reinforcing filler and step of activating agent, 1/2 metering part
Suddenly the heat filling of the surface modification treatment in (1) puts into remaining reinforcing filler, plasticizer and promotion after mixing 2min again
Agent, mixing to 140-150 DEG C of dumping；
(3) blend glue stuff back mixing 2-3 times on a mill for obtaining step (2), slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
The high conductive high strength electro-insulating rubber of above-mentioned preparation is performed the following performance tests, the results are shown in Table 1.
Table 1
As seen from the results in Table 1, the thermal coefficient of rubber material prepared by the present invention is up to 7W/ (mK), significantly larger than originally
The thermal coefficient (0.8-3W/ (mK)) of heat conductive silica gel in industry, volume resistivity remains at 1012Ω cm or more,
Have both good insulation performance and higher tensile strength.
The high conductive high strength electro-insulating rubber that the present invention is prepared can be obtained by compression molding, vulcanization and deburring
Required heat conductive rubber product.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (10)
1. a kind of high conductive high strength electro-insulating rubber, which is characterized in that comprise the following components in parts by weight:
2. high conductive high strength electro-insulating rubber according to claim 1, which is characterized in that the rubber raw rubber is butyronitrile rubber
At least one of glue, EP rubbers, butadiene-styrene rubber, butadiene rubber；The activating agent is zinc oxide, magnesia, stearic acid, gathers
At least one of ethylene glycol, stearate.
3. high conductive high strength electro-insulating rubber according to claim 1, which is characterized in that the reinforcing filler is mineral
Filler；Preferably, the mineral filler is at least one of carbon black, white carbon black, diatomite, calcium silicates clay.
4. high conductive high strength electro-insulating rubber according to claim 1, which is characterized in that the plasticizer is esters plasticising
Agent；Preferably, ester plasticizer includes dioctyl phthalate, dioctyl terephthalate, trioctyl trimellitate (TOTM), the last of the ten Heavenly stems two
At least one of dioctyl phthalate, dioctyl adipate, ethanedioic acid two (Butoxyethoxy second) ester.
5. high conductive high strength electro-insulating rubber according to claim 1, which is characterized in that the heat filling includes carbonization
Silicon, it is preferable that the heat filling is the mixture of silicon carbide and at least one of magnesia, aluminium oxide.
6. high conductive high strength electro-insulating rubber according to claim 1, which is characterized in that the surfactant includes ether
At least one of class surfactant, fatty acid soaps surfactant, amine ether surfactant, silane coupling agent.
7. high conductive high strength electro-insulating rubber according to claim 1, which is characterized in that the vulcanizing agent is sulfur vulcanization
System, SE curing system or efficient vulcanization system vulcanizing agent.
8. high conductive high strength electro-insulating rubber according to claim 1, which is characterized in that it further include promotor, the rush
It is at least one of tetramethylthiuram disulfide, N cyclohexyl 2 benzothiazole sulfenamide into agent.
9. high conductive high strength electro-insulating rubber according to claim 8, which is characterized in that the group including following parts by weight
Point:
10. the preparation method of described in any item high conductive high strength electro-insulating rubbers according to claim 1~9, which is characterized in that
The following steps are included:
(1) heat filling and surface treating agent are weighed in proportion, and heat filling is put into mixing machine, start blender with 100
The revolving speed of~250rpm stirs, and surface treating agent is added, and starts to warm up after surface treating agent is all added, and with 500~
The revolving speed of 700rpm stirs, and when temperature rises to required temperature, continues to stir 10min, is cooled to room temperature, obtains surface modification treatment
Heat filling；
(2) rubber raw rubber is first plasticated 2min, then successively puts into the reinforcing filler and step (1) of activating agent, 1/2 metering part
In surface modification treatment heat filling, put into remaining reinforcing filler and plasticizer, mixing to 140- again after mixing 2min
150 DEG C of dumpings；
(3) back mixing 2-3 times on a mill, slice park 12h；
(4) vulcanizing agent, Bao Tong 5-6 time, by required thickness slice are added on a mill.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110105638A (en) * | 2019-05-05 | 2019-08-09 | 华南协同创新研究院 | A kind of low-density high thermal conductivity non-silicon material and its preparation method and application |
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| CN113930020A (en) * | 2021-10-20 | 2022-01-14 | 杭州永腾橡塑实业有限公司 | Damping ring and preparation method thereof |
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