CN103254518B - A kind of electric insulation rubber and preparation method thereof - Google Patents
A kind of electric insulation rubber and preparation method thereof Download PDFInfo
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- CN103254518B CN103254518B CN201310229290.2A CN201310229290A CN103254518B CN 103254518 B CN103254518 B CN 103254518B CN 201310229290 A CN201310229290 A CN 201310229290A CN 103254518 B CN103254518 B CN 103254518B
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Abstract
The invention discloses a kind of electric insulation rubber and preparation method thereof; Aim to provide a kind of good insulating, the simple electric insulation rubber of making method, its technical scheme is such: this electric insulation rubber is made up of the component of following weight parts: Ethylene Propylene Terpolymer 100 parts, calcined kaolin 20 ~ 30 parts, thiofide PZ? 0.1 ~ 0.3 part, stearic acid? 1 ~ 2 part, paraffin oil 30 ~ 40 parts, indirect process zinc oxide 5 ~ 8 parts, rubber accelerator CZ? 0.3 ~ 0.5 part, liquid EPDM? 5 parts, thermal silica 15 ~ 25 parts, silane coupling agent? 0.5 ~ 1.5 part, sulphur? 1 ~ 2 part, rubber accelerator DM? 1 ~ 2 part; Its preparation method comprises the steps: 1) take each component; 2) segmentation banburying; 3) mill adds sulphur mixing action slice; 4) park and within 4 ~ 8 hours, make sizing material even further; Belong to field of rubber technology.<!--1-->
Description
Technical field
The object of the present invention is to provide a kind of rubber, specifically, be a kind of electric insulation rubber, the present invention also discloses the making method of this electric insulation rubber, belongs to field of rubber technology.
Background technology
The mainly ethylene-propylene rubber(EPR) of electro-insulating rubber in the market, terpolymer EP rubber main chain is made up of the stable hydrocarbon of chemical stabilization, only in side chain, contains unsaturated double-bond, therefore substantially belongs to kind of a saturation type rubber.Due to substituting group nonpolarity in molecular structure, intermolecular internal cohesive energy is low, therefore molecular chain can keep kindliness in wide temperature range.As the component of tire sidewall, adhesive tape and the inner tube of a tyre and automobile, can also make electric wire, cable sheathing and high pressure, ultra-high voltage insulating material.Also can manufacture the light color article such as rubber overshoes, sanitary product,
But it is good not that electro-insulating rubber in the market also exists insulativity, the problem such as be easily corroded, and complicate fabrication process, has certain harm to human body and environment.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of good insulating, simple electric insulation rubber of making method and preparation method thereof.
Last technical scheme of the present invention is such: this electric insulation rubber is made up of the component of following weight parts: Ethylene Propylene Terpolymer 100 parts, calcined kaolin 20 ~ 30 parts, thiofide PZ0.1 ~ 0.3 part, stearic acid 1 ~ 2 part, paraffin oil 30 ~ 40 parts, indirect process zinc oxide 5 ~ 8 parts, rubber accelerator CZ0.3 ~ 0.5 part, thermal silica 15 ~ 25 parts, liquid EPDM5 part ~ 15 part, silane coupling agent 0.5 ~ 1.5 part, 1 ~ 2 part, sulphur, rubber accelerator DM1 ~ 2 part.
Above-mentioned electric insulation rubber is made up of the component of following weight parts: Ethylene Propylene Terpolymer 100 parts, calcined kaolin 22 ~ 28 parts, thiofide PZ0.2 part, stearic acid 1.5 parts, paraffin oil 324 ~ 36 parts, indirect process zinc oxide 6 ~ 7 parts, rubber accelerator CZ0.4 part, thermal silica 18 ~ 22 parts, liquid EPDM5 part ~ 15 part, silane coupling agent 1 part, 1.5 parts, sulphur, rubber accelerator DM1.5 part.
Above-mentioned electric insulation rubber, the kinematic viscosity of described paraffin oil is 10 ~ 15mm2/s; Described Ethylene Propylene Terpolymer selects Tao Shi EPDM4520; Described liquid EPDM selects lion chemistry T67.
In order to prepare electric insulation rubber provided by the present invention, present invention also offers the preparation method of this electric insulation rubber: this electric insulation rubber and preparation method thereof comprises the steps: successively
1) each component is taken;
2) segmentation banburying
First Ethylene Propylene Terpolymer is added successively to Banbury mixer, thermal silica, calcined kaolin, the paraffin oil of 50% quality, silane coupling agent, at 55 ~ 65 DEG C, air pressure 0.5 ~ 0.8Mpa, after banburying 3min, then adds zinc oxide, stearic acid and paraffin oil binder removal after air pressure 0.5 ~ 0.8Mpa, 75-85 DEG C again banburying 10min.
3) mill adds sulphur mixing action slice
By step 2) input mill from the glue of Banbury mixer discharge, evenly slowly adds sulphur, thiofide PZ, rubber accelerator CZ along roller is right from a left side, rubber accelerator DM, spin 5 ~ 8 times, evenly mixing, then adjust roll spacing 0.8mm ~ 1mm spacing thin-pass three times bottom sheet.
4) park and within 4 ~ 8 hours, make sizing material even further.
Compared with prior art, tool of the present invention has the following advantages:
Eliminate unnecessary part in EPDM cooperation in this formula, simplify formulation composition, meet Production requirement, reduce production cost.Select materials and meet ROHS, PAHS standard, do not use the raw material containing violated compound, meet environmental requirement.
One, rubber is selected
1.1 Tao Shi EPDM4520, liquid EPDM selects lion chemistry T67, relative to traditional solid-state EP (D) M, the comparatively low viscosity of liquid EP (D) M has manifested its advantage at process zone, and traditional softening agent can not, EP (D) M of liquid simultaneously and solid-state EP (D) M main body occur crosslinked, like this can the generation of obvious minimizing organic volatile compound before crosslinked.And other performance to be subject to little impact even not influenced yet, its effectively reduces sizing material mooney viscosity in actual applications, makes sizing material have more mobility, is applicable to baroque various product.Increase the insulativity of material, and physicals, also can use as tenderizer and material gum content can not be reduced, but liquid EP (D) M processed complex, and price is more expensive, if be used alone, can increase certain production cost, the application passes through repetition test, by used in combination for solid-state EP (D) M and liquid EP (D) M, cost-saving, and the product performance of gained are good.
1.2 vulcanization systems: this formula selects SE curing system, gained cross-linked rubber had both had appropriate polysulfidic bond, also had appropriate single, double sulfur-crosslinked key, made it both have good dynamic property, had again medium heatproof oxidation performance energy.Arrange in pairs or groups sulfenamide type accelerators CZ and acidic-type accelerator TMTM use, form the sulphenamide vulcanization system of activation, sulfuration increases inductive phase, and anti-scorch successful, avoids the scorching phenomenon in the sizing material course of processing, be also conducive to the preservation of sizing material again.
1.3 reinforcement, infill system: do not add reinforcing and filling system because the EPDM selected belongs to amorphism rubber, vulcanizating glue physical performance is low, does not have practical value.This formula has selected aerosil to make strengthening agent, because aerosil internal structure is almost arrange silicic acid tridimensional network closely completely, this structure makes particle water absorbability little, and surface adsorption is strong, and reinforcement is good.And in the structure of precipitated silica except generating the silicic acid of three-dimensional structure, the also remaining silicic acid having more two-dirnentional structure, makes structure pine dredge, easy moisture absorption can reduce reinforcing effect, reduces insulativity.Calcined kaolin makes weighting agent: kaolin divides calcined kaolin and water-washed kaoline.Calcined kaolin is compared with non-calcined kaolin, the kaolinic Bound moisture content of low temperature calcination reduces, and silicon-dioxide and alchlor content all increase, and active site increases, structure changes, particle diameter is less and evenly, the raising of high-temperature calcination kaolin to small product size resistivity has very great help, then is equipped with silane coupling agent and carries out surface modification, improve the dispersiveness of filler and surperficial affinity, improve processing fluidity, improve the shock elasticity of rubber, reduce heat-dissipating etc.
1.4 preventing aging systems: this formula is according to the physical property of EPDM and service requirements therefore save this system.
System is softened in 1.5 plasticising: select volatility little in this formula, flash-point is high, and tenderizer made by the paraffin oil that viscosity is high.
2, electric insulation rubber production technology provided by the invention is stablized, and efficiency is high, and as low Mooney, time of scorch is moderate, vulcanization rate is fast.
3, technical scheme provided by the invention, even if human body Long Term Contact is harmless, does not produce obnoxious flavour and reaches European Union requirements standard, by multinomial European Union environmental protection certification ROHS, PAHS, normal hexane discharge etc. in sulfidation.
4, electric insulation rubber electric property provided by the invention and excellent physical properties, volume specific resistance 1016, disruptive strength > 25KV/mm, tensile yield > 600%, tensile strength at yield > 10Mpa, tear strength > 20KN/m.
Embodiment
Below in conjunction with embodiment; claim of the present invention is described in further detail; but do not form any limitation of the invention, the amendment of anyone limited number of time made within the scope of the claims in the present invention, still in claims of the present invention.
Embodiment 1
A kind of electric insulation rubber, is made up of following component: Tao Shi EPDM4520100Kg, calcined kaolin 30Kg, thiofide PZ0.1Kg, stearic acid 2Kg, kinematic viscosity is the paraffin oil 30Kg of 10mm2/s, indirect process zinc oxide 8Kg, rubber accelerator CZ0.3Kg, liquid EPDM5Kg, thermal silica 25Kg, silane coupling agent 0.5Kg, sulphur 2Kg, rubber accelerator DM1Kg.
Its making method
1) each component is taken;
2) segmentation banburying
First add successively to Banbury mixer: Tao Shi EPDM4520, liquid EPDM, thermal silica, calcined kaolin, the paraffin oil of 50% quality, silane coupling agent, at 55 ~ 65 DEG C, air pressure 0.5 ~ 0.8Mpa, after banburying 3min, add zinc oxide again, stearic acid and paraffin oil binder removal after air pressure 0.5 ~ 0.8Mpa, 75-85 DEG C again banburying 10min.
3) mill adds sulphur mixing action slice
By step 2) input mill from the glue of Banbury mixer discharge, evenly slowly adds sulphur, thiofide PZ, rubber accelerator CZ along roller is right from a left side, rubber accelerator DM, spin 5 ~ 8 times, evenly mixing, then adjust roll spacing 0.8mm ~ 1mm spacing thin-pass three times bottom sheet.
5) park and within 4 ~ 8 hours, make sizing material even further.
Embodiment 2
A kind of electric insulation rubber, is made up of following component: Tao Shi EPDM4520100Kg, calcined kaolin 20Kg, thiofide PZ0.3Kg, stearic acid 1Kg, kinematic viscosity is the paraffin oil 40Kg of 15mm2/s, indirect process zinc oxide 5Kg, rubber accelerator CZ0.5Kg, thermal silica 15Kg, lion chemistry T675Kg, silane coupling agent 0.5Kg, sulphur 2Kg, rubber accelerator DM1Kg.
Preparation method is with embodiment 1
Embodiment 3
A kind of electric insulation rubber, is made up of following component: Tao Shi EPDM4520100Kg, calcined kaolin 24Kg, thiofide PZ0.3Kg, stearic acid 1.5Kg, kinematic viscosity is the paraffin oil 35Kg of 7mm2/s, indirect process zinc oxide 7Kg, rubber accelerator CZ0.3g, thermal silica 15Kg, liquid EPDM10Kg, silane coupling agent 1.5Kg, sulphur 1.5Kg, rubber accelerator DM0.5Kg.
Preparation method is with embodiment 2
Embodiment 4
A kind of electric insulation rubber, is made up of following component: Tao Shi EPDM4520100Kg, calcined kaolin 25Kg, thiofide PZ0.2Kg, stearic acid 1.5Kg, kinematic viscosity is the paraffin oil 35Kg of 9mm2/s, indirect process zinc oxide 6Kg, rubber accelerator CZ0.4Kg, thermal silica 20Kg, lion chemistry T677Kg, silane coupling agent 1Kg, sulphur 1.5Kg, rubber accelerator DM1.5Kg.
Preparation method is with embodiment 1.
Claims (6)
1. an electric insulation rubber, is characterized in that, this electric insulation rubber is made up of the component of following weight parts: Ethylene Propylene Terpolymer 100 parts, calcined kaolin 20 ~ 30 parts, thiofide PZ0.1 ~ 0.3 part, stearic acid 1 ~ 2 part, paraffin oil 30 ~ 40 parts, indirect process zinc oxide 5 ~ 8 parts, rubber accelerator CZ0.3 ~ 0.5 part, thermal silica 15 ~ 25 parts, liquid EPDM5 part ~ 15 part, silane coupling agent 0.5 ~ 1.5 part, 1 ~ 2 part, sulphur, rubber accelerator DM1 ~ 2 part; Described electric insulation glue is prepared by the following method:
1) each component is taken by weight;
2) segmentation banburying
First Ethylene Propylene Terpolymer is added successively to Banbury mixer, liquid EPDM, thermal silica, calcined kaolin, the paraffin oil of 50% quality, silane coupling agent, at 55 ~ 65 DEG C, air pressure 0.5 ~ 0.8MPa, after banburying 3min, add zinc oxide again, stearic acid and paraffin oil at air pressure 0.5 ~ 0.8MPa, 75 ?85 DEG C of binder removals after banburying 10min again;
3) mill adds sulphur mixing action slice
By step 2) input mill from the glue of Banbury mixer discharge, evenly slowly adds sulphur, thiofide PZ, rubber accelerator CZ along roller is right from a left side, rubber accelerator DM, spin 5 ~ 8 times, evenly mixing, then adjust roll spacing 0.8mm ~ 1mm spacing thin-pass three times bottom sheet;
4) park and within 4 ~ 8 hours, make sizing material even further.
2. electric insulation rubber according to claim 1, is characterized in that, this electric insulation rubber is made up of the component of following weight parts: Ethylene Propylene Terpolymer 100 parts, calcined kaolin 22 ~ 28 parts, thiofide PZ0.2 part, stearic acid 1.5 parts, paraffin oil 32 ~ 36 parts, indirect process zinc oxide 6 ~ 7 parts, rubber accelerator CZ0.4 part, thermal silica 18 ~ 22 parts, liquid EPDM5 part ~ 15 part, silane coupling agent 1 part, 1.5 parts, sulphur, rubber accelerator DM1.5 part.
3. electric insulation rubber according to claim 1, is characterized in that, the kinematic viscosity of described paraffin oil is 10 ~ 15mm
2/ s.
4. want the electric insulation rubber described in 1 according to right, it is characterized in that, described Ethylene Propylene Terpolymer selects Tao Shi EPDM4520.
5. want the electric insulation rubber described in 1 according to right, it is characterized in that, described liquid EPDM selects lion chemistry T67.
6. the preparation method of the electric insulation rubber described in claims 1 or 2, is characterized in that, comprise the steps: successively
1) each component is taken by the weight part described in claim 1 or 2;
2) segmentation banburying
First Ethylene Propylene Terpolymer is added successively to Banbury mixer, liquid EPDM, thermal silica, calcined kaolin, the paraffin oil of 50% quality, silane coupling agent, at 55 ~ 65 DEG C, air pressure 0.5 ~ 0.8MPa, after banburying 3min, add zinc oxide again, stearic acid and paraffin oil at air pressure 0.5 ~ 0.8MPa, 75 ?85 DEG C of binder removals after banburying 10min again;
3) mill adds sulphur mixing action slice
By step 2) input mill from the glue of Banbury mixer discharge, evenly slowly adds sulphur, thiofide PZ, rubber accelerator CZ along roller is right from a left side, rubber accelerator DM, spin 5 ~ 8 times, evenly mixing, then adjust roll spacing 0.8mm ~ 1mm spacing thin-pass three times bottom sheet;
4) park and within 4 ~ 8 hours, make sizing material even further.
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| CN106751014A (en) * | 2016-11-29 | 2017-05-31 | 芜湖集拓橡胶技术有限公司 | A kind of electro-insulating rubber formula |
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| CN109354780A (en) * | 2018-09-29 | 2019-02-19 | 芜湖集拓橡胶技术有限公司 | Rubber is worn in a kind of resistance |
| CN110819011A (en) * | 2019-11-08 | 2020-02-21 | 株洲凯创技术有限公司 | Ethylene-propylene-diene monomer insulating rubber material and preparation method thereof |
| CN110964230B (en) * | 2019-12-19 | 2021-07-13 | 漳州市龙华矿产有限公司 | Fine kaolin processing method |
| CN112375276A (en) * | 2020-10-28 | 2021-02-19 | 诺博橡胶制品有限公司 | High-resistance matte sealing strip and preparation method thereof |
| CN114806028B (en) * | 2022-05-06 | 2024-02-13 | 国网智能电网研究院有限公司 | Ethylene propylene diene monomer composite material and preparation method and application thereof |
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