CN108912692A - Heat-conducting silicon rubber and preparation method thereof - Google Patents
Heat-conducting silicon rubber and preparation method thereof Download PDFInfo
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- CN108912692A CN108912692A CN201810947133.8A CN201810947133A CN108912692A CN 108912692 A CN108912692 A CN 108912692A CN 201810947133 A CN201810947133 A CN 201810947133A CN 108912692 A CN108912692 A CN 108912692A
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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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- 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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Abstract
The invention discloses a kind of heat-conducting silicon rubbers and preparation method thereof, are related to silicon rubber technical field comprising following components according to parts by weight：Vinyl silicone oil：95-105 parts, Al2O3：960-1100 parts, vinyl hydroxy silicone oil：4-6 parts, stearic acid：0.3-0.8 parts.Heat-conducting silicon rubber prepared by the present invention not only has stronger heating conduction, and has significant raising in hardness, tensile strength and elongation mechanical properties.
Description
Technical field
The present invention relates to silicon rubber technical fields, more particularly to a kind of heat-conducting silicon rubber and preparation method thereof.
Background technique
Silicon rubber has a variety of excellent performances such as good high-low temperature resistant, resistance to ozone, weatherability, electrical insulating property, in state
The every field of people's economy has a wide range of applications.Due to the weather-proof and ozone resistance that silicon rubber is excellent, there is heating conduction
Silicon rubber be commonly employed in electric utility prospect.Therefore, there is the silicon rubber of excellent heat conducting performance to have for research
Very positive meaning.
Summary of the invention
The technical problem to be solved by the present invention is to how improve the heating conduction of silicon rubber.
In order to solve the above technical problems, the present invention provides a kind of heat-conducting silicon rubber, below according to parts by weight
Component：Vinyl silicone oil：95-105 parts, Al2O3：960-1100 parts, vinyl hydroxy silicone oil：4-6 parts, stearic acid：0.3-0.8
Part, 2,5- dimethyl -2,5- di-t-butyl hexane peroxides：300-400 parts.
Technical effect：It joined suitable Al2O3 in the present invention, a kind of heat filling of the Al2O3 as better performances makes
There is higher heat-conductivity after addition type heat conducting silicon rubber solidification, react, can make between the vinyl silicone oil and stearic acid of addition
Obtaining heat-conducting silicon rubber has centainly weather-proof, ageing-resistant, high rigidity and high tenacity performance, so that tensile strength and elongation
Largely improving, viscosity is lower, and it is smaller on the influence of the mobile performance of heat conductive silica gel, and be added a certain amount of with volatility
Vinyl hydroxy silicone oil there is mobile performance outstanding so that addition type heat conducting silicon rubber has before curing compared with low viscosity,
Be conducive to encapsulating, vinyl hydroxy silicone oil slowly volatilizees after silicon rubber solidification, will not influence the performance of silicon rubber.
The technical solution that the present invention further limits is：Including following components according to parts by weight：Vinyl silicone oil：
100 parts, Al2O3：1000 parts, vinyl hydroxy silicone oil：5 parts, stearic acid：0.5 part, 2,5- dimethyl -2,5- di-t-butyl mistakes
Aoxidize hexane：350 parts.
Further, the Al2O3 includes the Al2O3 that two kinds of partial sizes are respectively 10-15nm and 20-30 μm, and two kinds of grains
The content ratio of diameter Al2O3 is 2:5.
A kind of preceding heat-conducting silicon rubber, the viscosity of the vinyl silicone oil are 990-1050mPas.
A kind of preparation method of heat-conducting silicon rubber, includes the following steps：
A, the vinyl silicone oil of 990-1050mPas viscosity is added in kneader；
B, the Al2O3 of stearic acid, vinyl hydroxy silicone oil, two kinds of partial sizes is divided in 3-5 addition kneader, is filled after being added every time
Divide and mediate, each kneading time is 7-9min, obtains heat-conducting silicon rubber rubber compound；
C, after kneaded and formed, lead to recirculated water and cool down to heat-conducting silicon rubber, heat-conducting silicon rubber rubber compound is then stirred into a hour,
150 DEG C are warming up to, timing heat refining two hours, is vacuumized later one hour, logical circulating water is cooled to 80 DEG C of plastic emittings；
D, filtering is cooled to room temperature after plastic emitting, obtains semi-finished product；
E, 2,5- dimethyl -2,5- di-t-butyl hexane peroxide is added into semi-finished product to mix in opening rubber mixing machine
It is even, and in carrying out molding vulcanization on vulcanizing press, finished product can be obtained.
The preceding method, in step e, sulfidation includes primary vulcanization and post-cure, wherein the primary vulcanization
Curing temperature be 175 DEG C, vulcanization time 5min, sulfide stress 10MPa, the post-cure includes through 200 DEG C of baking ovens
Dry 4h.
The beneficial effects of the invention are as follows：
(1) it is respectively 10-15nm and the two of 20-30 μm kinds of Al2O3 that Al2O3, which includes two kinds of partial sizes, in the present invention, can be filled in
In the different size gap of silicon rubber, so that Al2O3 is distributed relatively uniform in silicon rubber, the entirety for improving silicon rubber is thermally conductive
Performance.
Specific embodiment
Embodiment：A kind of heat-conducting silicon rubber, including following components according to parts by weight：Vinyl silicone oil：95-105 parts,
Al2O3：960-1100 parts, vinyl hydroxy silicone oil：4-6 parts, stearic acid：0.3-0.8 parts, the tertiary fourth of 2,5- dimethyl -2,5- bis-
Base butylperoxyhexane：300-400 parts.The heat-conducting silicon rubber selection of the present embodiment includes following components according to parts by weight：Second
Alkenyl silicone oil：100kg, Al2O3：1000kg, vinyl hydroxy silicone oil：5kg, stearic acid：0.5kg, 2,5- dimethyl -2,5- bis-
Tert-butyl hydroperoxide hexane：350 parts.
Wherein, Al2O3 includes the Al2O3 that two kinds of partial sizes are respectively 10-15nm and 20-30 μm, and two kinds of partial size Al2O3
Content ratio is 2:5.
The viscosity of vinyl silicone oil be 990-1050mPas, the present embodiment select viscosity for 1000 vinyl silicone oil.
A kind of preparation method of heat-conducting silicon rubber, includes the following steps：
A, the vinyl silicone oil of 990-1050mPas viscosity is added in kneader；
B, the Al2O3 of stearic acid, vinyl hydroxy silicone oil, two kinds of partial sizes is divided in 3-5 addition kneader, is filled after being added every time
Divide and mediate, each kneading time is 7-9min, obtains heat-conducting silicon rubber rubber compound；
C, after kneaded and formed, lead to recirculated water and cool down to heat-conducting silicon rubber, heat-conducting silicon rubber rubber compound is then stirred into a hour,
150 DEG C are warming up to, timing heat refining two hours, is vacuumized later one hour, logical circulating water is cooled to 80 DEG C of plastic emittings；
D, filtering is cooled to room temperature after plastic emitting, obtains semi-finished product；
E, 2,5- dimethyl -2,5- di-t-butyl hexane peroxide is added into semi-finished product to mix in opening rubber mixing machine
It is even, and in carrying out molding vulcanization on vulcanizing press, finished product can be obtained.
In step e, sulfidation includes primary vulcanization and post-cure, wherein the curing temperature once vulcanized is
175 DEG C, vulcanization time 5min, sulfide stress 10MPa, the post-cure includes drying 4h through 200 DEG C of baking ovens.
To the heat-conducting silicon rubber of above-mentioned implementation manufacture, performance such as following table：
| Detection project | Reference standard | Test result |
| Hardness (Shore A) | GB/T531-1999 | 45 |
| Thermal coefficient (W/m.k) | ASTM-D5470 | 3.0 |
| Density (kg/m3) | GB/T533-1991 | 2.5 |
| Tensile strength (MPa) | GB/T528-1998 | 1.9 |
| Elongation (%) | GB/T528-1998 | 500 |
As seen from the above table, the heat-conducting silicon rubber prepared by the present invention has stronger thermal coefficient, and its density is higher, can predict
The Al2O3 of different-grain diameter has preferable filling effect, and has in terms of hardness, tensile strength and elongation significant excellent
Gesture, therefore, heat-conducting silicon rubber prepared by the present invention not only have stronger heating conduction, and in hardness, tensile strength and stretch
Long rate mechanical properties have significant raising.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (6)
1. a kind of heat-conducting silicon rubber, it is characterised in that：Including following components according to parts by weight：Vinyl silicone oil：95-105
Part, Al2O3：960-1100 parts, vinyl hydroxy silicone oil：4-6 parts, stearic acid：0.3-0.8 parts, 2,5- dimethyl -2,5-, bis- uncle
Butyl peroxy hexane：300-400 parts.
2. heat-conducting silicon rubber according to claim 1, it is characterised in that：Including following components according to parts by weight：Second
Alkenyl silicone oil：100 parts, Al2O3：1000 parts, vinyl hydroxy silicone oil：5 parts, stearic acid：0.5 part, 2,5- dimethyl -2,5- bis-
Tert-butyl hydroperoxide hexane：350 parts.
3. heat-conducting silicon rubber according to claim 1, it is characterised in that：The Al2O3 includes that two kinds of partial sizes are respectively 10-
15nm and 20-30 μm of Al2O3, and the content ratio of two kinds of partial size Al2O3 is 2:5.
4. heat-conducting silicon rubber according to claim 1, it is characterised in that：The viscosity of the vinyl silicone oil is 990-1050
mPa·s。
5. such as the preparation method of heat-conducting silicon rubber of any of claims 1-4, it is characterised in that：Including following step
Suddenly：
A, the vinyl silicone oil of 990-1050 mPas viscosity is added in kneader；
B, the Al2O3 of stearic acid, vinyl hydroxy silicone oil, two kinds of partial sizes is divided in 3-5 addition kneader, is filled after being added every time
Divide and mediate, each kneading time is 7-9min, obtains heat-conducting silicon rubber rubber compound；
C, after kneaded and formed, lead to recirculated water and cool down to heat-conducting silicon rubber, heat-conducting silicon rubber rubber compound is then stirred into a hour,
150 DEG C are warming up to, timing heat refining two hours, is vacuumized later one hour, logical circulating water is cooled to 80 DEG C of plastic emittings；
D, filtering is cooled to room temperature after plastic emitting, obtains semi-finished product；
E, 2,5- dimethyl -2,5- di-t-butyl hexane peroxide is added into semi-finished product to mix in opening rubber mixing machine
It is even, and in carrying out molding vulcanization on vulcanizing press, finished product can be obtained.
6. the preparation method of heat-conducting silicon rubber according to claim 5, it is characterised in that：In step e, sulfidation includes
Primary vulcanization and post-cure, wherein the curing temperature once vulcanized is 175 DEG C, vulcanization time 5min, sulfide stress
For 10MPa, the post-cure includes drying 4h through 200 DEG C of baking ovens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810947133.8A CN108912692A (en) | 2018-08-20 | 2018-08-20 | Heat-conducting silicon rubber and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810947133.8A CN108912692A (en) | 2018-08-20 | 2018-08-20 | Heat-conducting silicon rubber and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0912893A (en) * | 1995-06-30 | 1997-01-14 | Shin Etsu Chem Co Ltd | Addition-curable silicone rubber composition for hot fixation roller and hot fixation roller using the same |
| CN104497575A (en) * | 2014-12-22 | 2015-04-08 | 广州市白云化工实业有限公司 | High-thermal-conductivity organosilicone mud and preparation method thereof |
| CN106280488A (en) * | 2016-08-24 | 2017-01-04 | 江苏天辰新材料股份有限公司 | A kind of silicone rubber of compression set function admirable and preparation method thereof |
-
2018
- 2018-08-20 CN CN201810947133.8A patent/CN108912692A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0912893A (en) * | 1995-06-30 | 1997-01-14 | Shin Etsu Chem Co Ltd | Addition-curable silicone rubber composition for hot fixation roller and hot fixation roller using the same |
| CN104497575A (en) * | 2014-12-22 | 2015-04-08 | 广州市白云化工实业有限公司 | High-thermal-conductivity organosilicone mud and preparation method thereof |
| CN106280488A (en) * | 2016-08-24 | 2017-01-04 | 江苏天辰新材料股份有限公司 | A kind of silicone rubber of compression set function admirable and preparation method thereof |
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