CN105949791A - Thermal-conductive silica gel sheet material and preparation method thereof - Google Patents
Thermal-conductive silica gel sheet material and preparation method thereof Download PDFInfo
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- 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
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- 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
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- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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Abstract
The invention provides a thermal-conductive silica gel sheet material and a preparation method thereof. The thermal-conductive silica gel sheet material is prepared from, by weight, 10%-40% of vinyl silicone oil, 55%-90% of aluminum oxide, 0.1%-1% of platinum water, 1%-3% of defoaming agent and 0.1%-1% of masterbatch. All the components are mutually matched, therefore, the thermal conductive coefficient of the thermal-conductive silica gel sheet material is increased to 3.8 W.m<-1>K<-1> to 4.8 W.m<-1>K<-1>, the hardness is moderate, the breakdown voltage reaches up to 25 kv.mm<-1> to 28 kv.mm<-1>, the tensile strength ranges from 3.7 Mpa to 4.2 Mpa, the elongation at break ranges from 75% to 90%, temperature resistance and cold and hot impact resistance are good, and the preparation method is simple and suitable for industrial production.
Description
Technical field
The invention belongs to heat conductive silica gel technical field of material, relate to a kind of heat conductive silica gel sheet material and system thereof
Preparation Method.
Background technology
Along with electronic equipment is towards miniaturization and the development of functional diversities, usually by multiple units in electronic equipment
Part and function collection are bonded in small assembly, and during causing using, temperature can raise rapidly, the temperature of rising
May result in the decline of electronic component performance, the equipment speed of service reduces, and equipment fault even occurs, because of
This, discharge the focus becoming research at present the most effectively timely and effectively by the heat produced in small component.
Heat conduction organosilicon film condensation material is the main flow material for transmitting energy between heating position and heat radiation position
Material, has good pliability, electrical insulating property and ductility, is the ideal of heat transfer material in electronic equipment
Select.
But, it is low that organosilicon Heat Conduction Material of the prior art often also exists heat conductivity, and stability is the best,
Material solidification process needs add vulcanizing agent, cause serious environmental pollution, be unfavorable for environmental conservation and
The problems such as health.
Therefore, need nonetheless remain in the art developing heat conductivility more preferable environment friendly silicon film condensation material.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of heat conductive silica gel sheet material and system thereof
Preparation Method.
For reaching this purpose, the present invention by the following technical solutions:
On the one hand, the present invention provides a kind of heat conductive silica gel sheet material, and described heat conductive silica gel sheet material includes following
The component of weight percentage:
In the present invention, by selecting vinyl silicone oil to cooperate with aluminium oxide, heat conductive silica gel can be improved
The heat conductivity of sheet material, and color masterbatch be added in imparting material while abundant color, it is possible to
Aluminium oxide matches, and improves the mechanical strength of heat conductive silica gel sheet material, and the most each component cooperates
Good heat conductivity and mechanical performance could be obtained.
In the heat conductive silica gel sheet material of the present invention, the consumption of described vinyl silicone oil is 10-40%, such as
10%, 12%, 14%, 16%, 18%, 20%, 22%, 25%, 28%, 30%, 33%, 35%,
38% or 40%, preferably 20-30%.
In the heat conductive silica gel sheet material of the present invention, the consumption of described aluminium oxide is 55-90%, such as 55%,
58%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 75%, 78%, 80%, 82%,
85%, 88% or 90%, preferably 60-70%.
In the heat conductive silica gel sheet material of the present invention, the consumption of described platinum water is 0.1-1%, such as 0.1%,
0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%,
0.7%, 0.8%, 0.9% or 1%.
In the heat conductive silica gel sheet material of the present invention, the consumption of described defoamer is 1-3%, such as 1%, 1.2%,
1.4%, 1.6%, 1.8%, 2%, 2.2%, 2.4%, 2.6%, 2.8% or 3%.
In the heat conductive silica gel sheet material of the present invention, the consumption of described color masterbatch is 0.1-1%, such as 0.1%,
0.15%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1%.
Preferably, described heat conductive silica gel sheet material includes the component of following weight percentage:
On the other hand, the present invention provides the preparation method of a kind of heat conductive silica gel sheet material as above, described
Method comprises the following steps:
(1) by the stirring mixing of dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch, evacuation, temperature is controlled
40 DEG C of reactions carried out above；
(2) in the mixed material of step (1) gained, paper tinsel Jinsui River is added, stirring mixing, evacuation, control
Temperature processed is 40 DEG C of reactions carried out above；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Preferably, step (1) described stirring for first carrying out low rate mixing, after carry out high-speed stirred.First carry out
Low rate mixing, so that material tentatively mixes, makes material be sufficiently mixed uniformly the most under high velocity agitation.
Preferably, the rotating speed of described low rate mixing is 10-30r/min, such as 10r/min, 12r/min, 15
R/min, 18r/min, 20r/min, 22r/min, 24r/min, 26r/min, 28r/min or 30r/min.
Preferably, the time of described low rate mixing is 1-5min, such as 1min, 2min, 3min, 4min
Or 5min.
Preferably, the rotating speed of described high-speed stirred is 200-300r/min, such as 200r/min, 210r/min,
220r/min、230r/min、240r/min、250r/min、260r/min、270r/min、280r/min、
290r/min or 300r/min.
Preferably, the time of described high-speed stirred is 5-15min, such as 5min, 6min, 7min, 8min,
9min, 10min, 11min, 12min, 13min, 14min or 15min.
Preferably, the vacuum of step (1) described evacuation is-0.1～-0.09MPa, such as-0.1MPa,
-0.098MPa ,-0.095MPa ,-0.093MPa or-0.09MPa.
Preferably, the time of step (1) described evacuation is 1-15min, such as 1min, 2min, 3min,
4min、5min、6min、7min、8min、9min、10min、11min、12min、13min、
14min or 15min.
Preferably, step (1) described temperature controls at 45-60 DEG C, such as 45 DEG C, 48 DEG C, 50 DEG C, 52 DEG C,
54 DEG C, 55 DEG C, 57 DEG C, 59 DEG C or 60 DEG C.
Preferably, the time of step (1) described reaction is 10-30min, such as 10min, 12min,
15min, 18min, 20min, 23min, 25min, 28min or 30min.
Preferably, step (2) described stirring, for first to carry out moderate-speed mixer, then carries out high-speed stirred.
Preferably, the rotating speed of described moderate-speed mixer is 60-90r/min, such as 60r/min, 63r/min, 65
r/min、68r/min、70r/min、72r/min、75r/min、78r/min、80r/min、83r/min、
85r/min, 88r/min or 90r/min.
Preferably, the time of described moderate-speed mixer is 1-8min, such as 1min, 2min, 3min, 4min,
5min, 6min, 7min or 8min.
Preferably, the rotating speed of described high-speed stirred is 200-300r/min, such as 200r/min, 210r/min,
220r/min、230r/min、240r/min、250r/min、260r/min、270r/min、280r/min、
290r/min or 300r/min.
Preferably, the time of described high-speed stirred is 5-15min, such as 5min, 6min, 7min, 8min,
9min, 10min, 11min, 12min, 13min, 14min or 15min.
Preferably, the vacuum of step (2) described evacuation is-0.1～-0.09MPa, such as-0.1MPa,
-0.098MPa ,-0.095MPa ,-0.093MPa or-0.09MPa.
Preferably, the time of step (2) described evacuation is 3-15min, such as 3min, 4min, 5min,
6min, 7min, 8min, 9min, 10min, 11min, 12min, 13min, 14min or 15min.
Preferably, step (2) described temperature controls at 50-70 DEG C, such as 50 DEG C, 52 DEG C, 54 DEG C, 55 DEG C,
57 DEG C, 59 DEG C, 61 DEG C, 63 DEG C, 65 DEG C, 68 DEG C or 70 DEG C.
Preferably, the time of step (2) described reaction is 10-30min, such as 10min, 12min,
15min, 18min, 20min, 23min, 25min, 28min or 30min.
As optimal technical scheme, the preparation method of described heat conductive silica gel sheet material specifically includes following steps:
(1) dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch are first stirred under 10-30r/min rotating speed
Mixing 1-5min, then under 200-300r/min rotating speed stirring mixing 5-15min, be evacuated to-0.1～
-0.09MPa keeps 1-15min, then controls temperature and reacts 10-30min more than 40 DEG C；
(2) in the mixed material of step (1) gained, paper tinsel Jinsui River is added, first under 60-90r/min rotating speed
Stirring mixing 1-8min, then stirring mixing 5-15min under 200-300r/min rotating speed, is evacuated to
-0.1～-0.09MPa keeps 3-15min, controls temperature and reacts 10-30min more than 40 DEG C；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Relative to prior art, the method have the advantages that
The present invention utilizes 10-40% vinyl silicone oil, 55-90% aluminium oxide, 0.1-1% platinum water, 1-3% froth breaking
Agent and 0.1-1% color masterbatch prepare heat conductive silica gel sheet material, and the most each component cooperates, so that lead
The heat conductivity of hot silica gel piece material improves to 3.8-4.8W m-1K-1, hardness moderate (40-45), breakdown potential
Pressure up to 25-28kv mm-1, hot strength 3.7-4.2Mpa, elongation at break is 75-90%, temperature tolerance
Good with cold-hot impact, and the preparation method of the present invention is simple, is suitable for industrialized production.
Detailed description of the invention
Technical scheme is further illustrated below by detailed description of the invention.Those skilled in the art
It will be clearly understood that the only help of described embodiment understands the present invention, it is not construed as the concrete restriction to the present invention.
Embodiment 1
In the present embodiment, heat conductive silica gel sheet material includes the component of following weight percentage:
Preparation method is as follows:
(1) the first stirring mixing under 20r/min rotating speed by dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch
1min, then stirring mixing 15min under 200r/min rotating speed, is evacuated to-0.1MPa and keeps 4min,
Then control temperature and react 20min at 45 DEG C；
(2) in the mixed material of step (1) gained, add paper tinsel Jinsui River, first stir under 60r/min rotating speed
Mixing mixing 1min, then stirring mixing 5min under 200r/min rotating speed, is evacuated to-0.1MPa and keeps
3min, controls temperature and reacts 20min at 60 DEG C；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Embodiment 2
In the present embodiment, heat conductive silica gel sheet material includes the component of following weight percentage:
Preparation method is as follows:
(1) the first stirring mixing under 10r/min rotating speed by dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch
5min, then stirring mixing 5min under 300r/min rotating speed, is evacuated to-0.09MPa and keeps 15min,
Then control temperature and react 30min at 60 DEG C；
(2) in the mixed material of step (1) gained, add paper tinsel Jinsui River, first stir under 90r/min rotating speed
Mixing mixing 8min, then stirring mixing 10min under 300r/min rotating speed, is evacuated to-0.09MPa and protects
Hold 8min, control temperature and react 10min at 70 DEG C；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Embodiment 3
In the present embodiment, heat conductive silica gel sheet material includes the component of following weight percentage:
Preparation method is as follows:
(1) the first stirring mixing under 30r/min rotating speed by dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch
3min, then stirring mixing 10min under 250r/min rotating speed, is evacuated to-0.1MPa and keeps 10min,
Then control temperature and react 15min at 50 DEG C；
(2) in the mixed material of step (1) gained, add paper tinsel Jinsui River, first stir under 80r/min rotating speed
Mixing mixing 5min, then stirring mixing 15min under 200r/min rotating speed, is evacuated to-0.1MPa and protects
Hold 15min, control temperature more than 50 DEG C, react 30min；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Embodiment 4
In the present embodiment, heat conductive silica gel sheet material includes the component of following weight percentage:
Preparation method is as follows:
(1) the first stirring mixing under 15r/min rotating speed by dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch
5min, then stirring mixing 5min under 300r/min rotating speed, is evacuated to-0.09MPa and keeps 8min,
Then control temperature and react 20min at 60 DEG C；
(2) in the mixed material of step (1) gained, add paper tinsel Jinsui River, first stir under 60r/min rotating speed
Mixing mixing 1min, then stirring mixing 10min under 250r/min rotating speed, is evacuated to-0.1MPa and keeps
10min, controls temperature and reacts 10-30min more than 40 DEG C；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Embodiment 5
In the present embodiment, heat conductive silica gel sheet material includes the component of following weight percentage:
Preparation method is as follows:
(1) the first stirring mixing under 25r/min rotating speed by dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch
5min, then stirring mixing 15min under 280r/min rotating speed, is evacuated to-0.1MPa and keeps 8min,
Then control temperature and react 10min at 45 DEG C；
(2) in the mixed material of step (1) gained, add paper tinsel Jinsui River, first stir under 70r/min rotating speed
Mixing mixing 8min, then stirring mixing 5min under 300r/min rotating speed, is evacuated to-0.1MPa and keeps
10min, controls temperature and reacts 20min at 70 DEG C；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Comparative example 1
This comparative example the difference is that only with embodiment 1, does not include oxidation in heat conductive silica gel sheet material
Aluminum, the consumption of vinyl silicone oil is 97.4%, in addition, remaining raw material dosage and preparation method all with
Embodiment 1 is identical.
Comparative example 2
This comparative example the difference is that only with embodiment 1, does not include color masterbatch in heat conductive silica gel sheet material,
The consumption of aluminium oxide is 70.6%, in addition, remaining raw material dosage and preparation method all with embodiment 1
Identical.
Comparative example 3
This comparative example the difference is that only with embodiment 2, at heat conductive silica gel sheet material medium vinyl silicone oil
Consumption be 8%, the consumption of aluminium oxide is 89.9%, in addition, remaining raw material dosage and preparation method
The most same as in Example 2.
Comparative example 4
This comparative example the difference is that only with embodiment 3, at heat conductive silica gel sheet material medium vinyl silicone oil
Consumption be 43%, the consumption of aluminium oxide is 52%, in addition, remaining raw material dosage and preparation method
The most same as in Example 3.
Comparative example 5
This comparative example the difference is that only with embodiment 2, the use of aluminium oxide in heat conductive silica gel sheet material
Amount is 91%, and the consumption of vinyl silicone oil is 6.9%, in addition, and remaining raw material dosage and preparation method
The most same as in Example 2.
Comparative example 6
This comparative example the difference is that only with embodiment 1, the consumption of color masterbatch in heat conductive silica gel sheet material
Being 0.05%, the consumption of aluminium oxide is 70.55%, and in addition, remaining raw material dosage and preparation method are equal
Same as in Example 1.
Comparative example 7
This comparative example the difference is that only with embodiment 1, the consumption of color masterbatch in heat conductive silica gel sheet material
Being 1.2%, the consumption of aluminium oxide is 69.4%, in addition, remaining raw material dosage and preparation method all with
Embodiment 1 is identical.
The heat conductive silica gel sheet material prepared by embodiment 1-5 and comparative example 1-7 is prepared thickness and is
The silica gel sheet material of 2mm, tests its performance with reference to method of testing known in the art, and test result is such as
Shown in Tables 1 and 2.
Table 1
Table 2
By the result of Tables 1 and 2 it can be seen that in the heat conductive silica gel sheet material for preparing of the present invention each group
Divide and cooperate, the heat conductivity of heat conductive silica gel sheet material can be improved, there is good mechanical strength, when
When not including (such as comparative example 1 and comparative example 2) when a certain component improves another kind of constituent content,
Heat conductivility and the mechanical performance of heat conductive silica gel sheet material will be damaged, when the most a certain component or certain several groups
Point content too much or very few time (such as comparative example 3-7), still can make each side of heat conductive silica gel sheet material
Performance can not get being obviously improved.
Applicant state, the present invention by above-described embodiment illustrate the present invention heat conductive silica gel sheet material and
Preparation method, but the invention is not limited in above-described embodiment, i.e. do not mean that the present invention has to rely on above-mentioned
Embodiment could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The equivalence of raw material each to product of the present invention is replaced and the interpolation of auxiliary element, concrete way choice etc., all falls
Within the scope of protection scope of the present invention and disclosure.
Claims (10)
1. a heat conductive silica gel sheet material, it is characterised in that described heat conductive silica gel sheet material includes following weight
The component of percentage composition:
Heat conductive silica gel sheet material the most according to claim 1, it is characterised in that described vinyl silicone oil
Weight percentage be 20-30%；
Preferably, the weight percentage of described aluminium oxide is 60-70%.
Heat conductive silica gel sheet material the most according to claim 1 and 2, it is characterised in that described thermal conductive silicon
Film condensation material includes the component of following weight percentage:
4. according to the preparation method of the heat conductive silica gel sheet material according to any one of claim 1-3, its feature
It is, said method comprising the steps of:
(1) by the stirring mixing of dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch, evacuation, temperature is controlled
40 DEG C of reactions carried out above；
(2) in the mixed material of step (1) gained, paper tinsel Jinsui River is added, stirring mixing, evacuation, control
Temperature processed is 40 DEG C of reactions carried out above；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
Preparation method the most according to claim 4, it is characterised in that step (1) described stirring is
First carry out low rate mixing, after carry out high-speed stirred；
Preferably, the rotating speed of described low rate mixing is 10-30r/min；
Preferably, the time of described low rate mixing is 1-5min；
Preferably, the rotating speed of described high-speed stirred is 200-300r/min；
Preferably, the time of described high-speed stirred is 5-15min.
6. according to the preparation method described in claim 4 or 5, it is characterised in that step is taken out described in (1)
The vacuum of vacuum is-0.1～-0.09MPa；
Preferably, the time of step (1) described evacuation is 1-15min；
Preferably, step (1) described temperature controls at 45-60 DEG C；
Preferably, the time of step (1) described reaction is 10-30min.
7. according to the preparation method according to any one of claim 4-6, it is characterised in that step (2)
Described stirring, for first to carry out moderate-speed mixer, then carries out high-speed stirred；
Preferably, the rotating speed of described moderate-speed mixer is 60-90r/min；
Preferably, the time of described moderate-speed mixer is 1-8min；
Preferably, the rotating speed of described high-speed stirred is 200-300r/min；
Preferably, the time of described high-speed stirred is 5-15min.
8. according to the preparation method according to any one of claim 4-7, it is characterised in that step (2)
The vacuum of described evacuation is-0.1～-0.09MPa.
9. according to the preparation method according to any one of claim 4-8, it is characterised in that step (2)
The time of described evacuation is 3-15min；
Preferably, step (2) described temperature controls at 50-70 DEG C；
Preferably, the time of step (2) described reaction is 10-30min.
10. according to the preparation method according to any one of claim 4-9, it is characterised in that described method
Comprise the following steps:
(1) dilute for second base silicone oil, defoamer, aluminium oxide and color masterbatch are first stirred under 10-30r/min rotating speed
Mixing 1-5min, then under 200-300r/min rotating speed stirring mixing 5-15min, be evacuated to-0.1～
-0.09MPa keeps 1-15min, then controls temperature and reacts 10-30min more than 40 DEG C；
(2) in the mixed material of step (1) gained, paper tinsel Jinsui River is added, first under 60-90r/min rotating speed
Stirring mixing 1-8min, then stirring mixing 5-15min under 200-300r/min rotating speed, is evacuated to
-0.1～-0.09MPa keeps 3-15min, controls temperature and reacts 10-30min more than 40 DEG C；
(3) by the extrusion molding of step (2) reacted material, described heat conductive silica gel sheet material is obtained.
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| CN106046798A (en) * | 2016-07-07 | 2016-10-26 | 昆山汉品电子有限公司 | Uniform-temperature heat-conducting silica gel piece |
-
2016
- 2016-07-14 CN CN201610562056.5A patent/CN105949791A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102555331A (en) * | 2012-01-18 | 2012-07-11 | 苏州领胜电子科技有限公司 | Thermal-conductive silicon sheet and manufacturing method thereof |
| CN103665882A (en) * | 2012-09-19 | 2014-03-26 | 浙江三元电子科技有限公司 | Heat conduction silicon rubber composite material, heat conduction silicon sheet and preparation method of heat conduction silicon sheet |
| CN103333502A (en) * | 2013-06-26 | 2013-10-02 | 苏州天脉导热科技有限公司 | Ultrathin heat conductive silicon sheet and preparation method thereof |
| CN103342896A (en) * | 2013-06-26 | 2013-10-09 | 苏州天脉导热科技有限公司 | High temperature resistant heat-conducting silica gel sheet and preparation method thereof |
| CN105504830A (en) * | 2015-12-29 | 2016-04-20 | 江苏创景科技有限公司 | Single-component addition type heat conduction organic silicon rubber and preparation method thereof |
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