CN102942716A - Composite type heat conducting rubber and method for preparing same - Google Patents
Composite type heat conducting rubber and method for preparing same Download PDFInfo
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- CN102942716A CN102942716A CN2012104461493A CN201210446149A CN102942716A CN 102942716 A CN102942716 A CN 102942716A CN 2012104461493 A CN2012104461493 A CN 2012104461493A CN 201210446149 A CN201210446149 A CN 201210446149A CN 102942716 A CN102942716 A CN 102942716A
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Abstract
The invention discloses a composite type heat conducting rubber. In parts by weight, the composite type heat conducting rubber comprises 100 parts of natural rubber, electric conduction modifying agent, 3 parts of sulfur, 2 parts of vulcanization accelerator and 9 parts of vulcanizing activator; and the electric conduction modifying agent is 1-5 parts of carbon fiber, 10-50 parts of silicon carbide or 7.5-15 parts of copper powder. The composite type heat conducting rubber adopts the carbon fiber, the silicon carbide or the copper powder as the electric conduction modifying agent, the addition amount of the electric conduction modifying agent is strictly controlled and screened, so that an obtained product has good electric conduction performance, and optimal various performance indexes of the obtained product can also be realized. The composite type heat conducting rubber is simple in preparation material technology, is convenient to operate, has high benefit and is suitable for industrial production.
Description
Technical field
The present invention relates to material science, especially a kind of compound heat conductive rubber and preparation method thereof.
Background technology
Natural rubber is a kind of natural high moleculer eompound take polyisoprene as main component, has at normal temperatures higher elasticity, slightly is with plasticity, has extraordinary physical strength, hysteresis loss is less, and because be non-polar rubber, so its insulating property are also good.
Heat conductive rubber is a class rubber-base composite material that stresses heat conductivility, and the raising of heat conductivility is accompanied by the optimization of heat dispersion usually.Heat radiation is of crucial importance to electronic product, and statistical information shows, 2 ℃ of the every risings of electronic element temperature, its reliability decrease 10%; When the life-span in the time of 50 ℃ needs only 25 ℃ 1/6.Heat conductive rubber needing in space flight, aviation, electronics, the appliance field to be widely used in the position of dispelling the heat and conducting heat, and can play the effect of insulation and damping simultaneously.The insulating heat-conductive caulking gum has higher thermal conductivity, good electrical property and ageing-resistant performance, and the heat that produces during the electronic product that can effectively leave uses is all significant to its reliability of densification, miniaturization and raising and the life-span of electronic product.
Summary of the invention
Technical problem to be solved by this invention provides a kind of compound heat conductive rubber and preparation method thereof, and it can make natural rubber property indices when having certain electroconductibility reach optimum.
The present invention is achieved in that compound heat conductive rubber, calculates by weight, comprises 100 parts of natural rubbers, heat conduction properties-correcting agent, 3 parts in sulphur, 9 parts of 2 parts of vulcanization accelerators and vulcanization levellers; Described heat conduction properties-correcting agent is 1～5 part on carbon fiber, 7.5～15 parts of 10～50 parts in silicon carbide or copper powders.
Described vulcanization accelerator is promotor TT.
Per 9 parts of vulcanization levellers are comprised of 6 parts of zinc oxide and 3 parts of stearic acid.
The preparation method of compound heat conductive rubber carries out plastics with natural rubber, obtains plastic cement; Add the conductive modified agent in the broken-(down)rubber, sulphur carries out mixingly behind vulcanization accelerator and the vulcanization leveller, obtain rubber unvulcanizate; The rubber unvulcanizate that obtains, is added in the mould after mixing 20 minutes at mill refining glue 10 minutes, milling machine, make the sulfuration that begins to be heated of rubber unvulcanizate and counterdie contact part; The rubber unvulcanizate volumetric expansion; Rubber unvulcanizate is expanded to after patrix contacts fully, and the rubber unvulcanizate that contacts with patrix begins sulfuration, and by the conduction of conducting heat, rubber unvulcanizate inside begins sulfuration, obtains finished product after the sulfuration typing.
Compression molding instrument upper die and lower die temperature is 150 ℃, and middle mould temperature is 148 ℃, and curing time is 10 minutes.
Carried out following experiment by experiment effect of the present invention in order further to verify:
Take natural rubber as matrix, promotor TT is vulcanization accelerator, and sulphur is vulcanizing agent, adds in addition zinc oxide and stearic acid as vulcanization leveller, adds respectively silicon carbide, carbon fiber or the copper powder of different content.Rubber mixing technique additive interpolation order: natural rubber-silicon carbide/carbon fiber/copper powder-zinc oxide-stearic acid-promotor-sulphur.The recipe ingredient of carbon fiber, silicon carbide, copper powder ratio of quality and the number of copies is as follows:
The grouping sheet of table 1 (carbon fiber) natural rubber (a=gram, lower same)
Table 2 (silicon carbide) natural rubber grouping sheet
Table 3 (copper powder) natural rubber grouping sheet
The preparation method of compound heat conductive rubber comprises the steps:
Respectively carbon fiber, carbonization ketone, copper powder are prepared compound heat conductive rubber prescription and accurately take by weighing each component according to described;
Each component that weighs up is simply mixed, and mixing through mill, milling machine;
Described mixing materials is vulcanized at XLB-D350X350X2 compression molding instrument.
Mechanics Performance Testing;
Tensile strength, tear resistance are tested according to standard GB/T/T 1040.2-2006, GB/T 1843-2008, wherein along with the test result of the compound heat conductive rubber of increase of carbon fiber, silicon carbide, copper powder content is as shown in the table:
Table 4 carbon fiber content is on the impact of compound heat conductive rubber performance
Table 5 carborundum content is on the impact of compound heat conductive rubber performance
Table 6 copper powder content is on the impact of compound heat conductive rubber performance
Learn according to experimental result, the tensile strength, tearing toughness, the swelling ratio that add the natural rubber of silicon carbide all decrease, the time sulfurizing time of burning reduces, vulcanization rate increases, and hardness and bounce impact elasticity all increase, when Silicon carbide addition was 20 parts, thermal conductivity was 0.72W/ (m ℃).The tensile strength of the natural rubber of adding carbon fiber and tearing toughness and swelling ratio decrease, the time sulfurizing time of burning reduces, vulcanization rate increases, but when adding 4 parts of carbon fibers, it raises rapidly, and hardness increases in addition, but impact is little, and when the carbon fiber add-on was 3 parts, thermal conductivity was 0.9W/ (m ℃).The tensile strength and the tearing toughness that add the natural rubber of copper powder at first all are to reduce afterwards to raise again, and it is for the highest when adding 12.5 parts of copper powders, and when the copper powder add-on was 10 parts, thermal conductivity was 1.4W/ (m ℃).
Owing to adopted above-mentioned technical scheme, compared with prior art, the present invention adopts carbon fiber, silicon carbide or copper powder are as heat conduction properties-correcting agent, its add-on strict control and screening have been carried out, make the product of acquisition not only have good heat conductivility, and property indices also can reach optimum.It is simple that the present invention prepares material technology, easy to operate, and high efficiency is suitable for carrying out industrial production.
Description of drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiments of the invention 1: compound heat conductive rubber, calculate by weight, comprise 100 parts of natural rubbers, 3 parts on carbon fiber, 10 parts in silicon carbide, 10 parts of copper powders, 3 parts in sulphur, 9 parts of promotor TT2 part and vulcanization levellers, vulcanization leveller is comprised of 6 parts of zinc oxide and 3 parts of stearic acid.
The preparation method of compound heat conductive rubber carries out plastics with natural rubber, obtains plastic cement; Add the conductive modified agent in the broken-(down)rubber, sulphur carries out mixingly behind vulcanization accelerator and the vulcanization leveller, obtain rubber unvulcanizate; The rubber unvulcanizate that obtains, is added in the mould after mixing 20 minutes at mill refining glue 10 minutes, milling machine, make the sulfuration that begins to be heated of rubber unvulcanizate and counterdie contact part; The rubber unvulcanizate volumetric expansion; Rubber unvulcanizate is expanded to after patrix contacts fully, and the rubber unvulcanizate that contacts with patrix begins sulfuration, and by the conduction of conducting heat, rubber unvulcanizate inside begins sulfuration, obtains finished product after the sulfuration typing; In the sulfidation, compression molding instrument upper die and lower die temperature is 150 ℃, and middle mould temperature is 148 ℃, and curing time is 10 minutes.
Embodiments of the invention 2: compound heat conductive rubber, calculate by weight, comprise 100 parts of natural rubbers, 4 parts on carbon fiber, 20 parts in silicon carbide, 8 parts of copper powders, 3 parts in sulphur, 9 parts of promotor TT2 part and vulcanization levellers, vulcanization leveller is comprised of 6 parts of zinc oxide and 3 parts of stearic acid.
The preparation method is with embodiment 1.
Embodiments of the invention 3: compound heat conductive rubber, calculate by weight, comprise 100 parts of natural rubbers, 2 parts on carbon fiber, 30 parts in silicon carbide, 12 parts of copper powders, 3 parts in sulphur, 9 parts of promotor TT2 part and vulcanization levellers, vulcanization leveller is comprised of 6 parts of zinc oxide and 3 parts of stearic acid.
The preparation method is with embodiment 1.
Claims (5)
1. a compound heat conductive rubber is characterized in that: calculate by weight, comprise 100 parts of natural rubbers, heat conduction properties-correcting agent, 3 parts in sulphur, 9 parts of 2 parts of vulcanization accelerators and vulcanization levellers; Described heat conduction properties-correcting agent is 1～5 part on carbon fiber, 7.5～15 parts of 10～50 parts in silicon carbide or copper powders.
2. compound heat conductive rubber according to claim 1, it is characterized in that: described vulcanization accelerator is promotor TT.
3. compound heat conductive rubber according to claim 1, it is characterized in that: per 9 parts of vulcanization levellers are comprised of 6 parts of zinc oxide and 3 parts of stearic acid.
4. the preparation method of a compound heat conductive rubber as claimed in claim 1 is characterized in that: natural rubber is carried out plastics, obtain plastic cement; Add the conductive modified agent in the broken-(down)rubber, sulphur carries out mixingly behind vulcanization accelerator and the vulcanization leveller, obtain rubber unvulcanizate; The rubber unvulcanizate that obtains, is added in the mould after mixing 20 minutes at mill refining glue 10 minutes, milling machine, make the sulfuration that begins to be heated of rubber unvulcanizate and counterdie contact part; The rubber unvulcanizate volumetric expansion; Rubber unvulcanizate is expanded to after patrix contacts fully, and the rubber unvulcanizate that contacts with patrix begins sulfuration, and by the conduction of conducting heat, rubber unvulcanizate inside begins sulfuration, obtains finished product after the sulfuration typing.
5. the preparation method of compound heat conductive rubber according to claim 4, it is characterized in that: compression molding instrument upper die and lower die temperature is 150 ℃, and middle mould temperature is 148 ℃, and curing time is 10 minutes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614796A (en) * | 2013-12-03 | 2014-03-05 | 紫罗兰家纺科技股份有限公司 | Method for producing cool sense honeycomb fibers |
| CN104031299A (en) * | 2013-08-13 | 2014-09-10 | 辽宁跨克石油装备有限公司 | Sizing material blend and preparation method thereof |
| CN104130476A (en) * | 2014-07-25 | 2014-11-05 | 黄山市尚义橡塑制品有限公司 | Wide-temperature range high-thermal conductivity rubber-based composite material and preparation method thereof |
| CN107090103A (en) * | 2017-05-22 | 2017-08-25 | 华南理工大学 | Natural gum/silicon rubber/aluminum oxide ternary heat-conductive composite material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003168413A (en) * | 2001-11-30 | 2003-06-13 | Sanyo Electric Co Ltd | Battery and its manufacturing method |
| CN102504358A (en) * | 2011-11-22 | 2012-06-20 | 广东石油化工学院 | High-heat-conductivity rubber composite material and preparation method thereof |
-
2012
- 2012-11-09 CN CN2012104461493A patent/CN102942716A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003168413A (en) * | 2001-11-30 | 2003-06-13 | Sanyo Electric Co Ltd | Battery and its manufacturing method |
| CN102504358A (en) * | 2011-11-22 | 2012-06-20 | 广东石油化工学院 | High-heat-conductivity rubber composite material and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104031299A (en) * | 2013-08-13 | 2014-09-10 | 辽宁跨克石油装备有限公司 | Sizing material blend and preparation method thereof |
| CN103614796A (en) * | 2013-12-03 | 2014-03-05 | 紫罗兰家纺科技股份有限公司 | Method for producing cool sense honeycomb fibers |
| CN103614796B (en) * | 2013-12-03 | 2016-06-15 | 紫罗兰家纺科技股份有限公司 | A kind of production method of cool feeling cellular fibronectin |
| CN104130476A (en) * | 2014-07-25 | 2014-11-05 | 黄山市尚义橡塑制品有限公司 | Wide-temperature range high-thermal conductivity rubber-based composite material and preparation method thereof |
| CN104130476B (en) * | 2014-07-25 | 2016-08-24 | 黄山市尚义橡塑制品有限公司 | A kind of preparation method of wide temperature range height heat conductive rubber based composites |
| CN107090103A (en) * | 2017-05-22 | 2017-08-25 | 华南理工大学 | Natural gum/silicon rubber/aluminum oxide ternary heat-conductive composite material and preparation method thereof |
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Application publication date: 20130227 |