CN114806177A - Preparation method of liquid silicone rubber - Google Patents
Preparation method of liquid silicone rubber Download PDFInfo
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- CN114806177A CN114806177A CN202111171085.6A CN202111171085A CN114806177A CN 114806177 A CN114806177 A CN 114806177A CN 202111171085 A CN202111171085 A CN 202111171085A CN 114806177 A CN114806177 A CN 114806177A
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Abstract
The application discloses a preparation method of liquid silicone rubber, which comprises the following steps: mixing 86.1 parts by mass of the component A with 13.9 parts by mass of copper calcium titanate powder to obtain a first mixture; mixing 86.1 parts by mass of the component B with 13.9 parts by mass of copper calcium titanate powder to obtain a second mixture; and mixing the first mixture and the second mixture to obtain the liquid silicone rubber. By adopting the method, the copper calcium titanate powder and the high-viscosity liquid silicone rubber finished product can be well mixed, the mixed copper calcium titanate powder particles are uniformly filled, the agglomeration degree is small, and the bubbles are few, so that the performance of the modified liquid silicone rubber material reaches the design requirement, the good flowing performance can be ensured, and the vacuum injection molding of large products is facilitated.
Description
Technical Field
The application relates to the field of direct current cable accessory insulating materials, in particular to a preparation method of liquid silicone rubber.
Background
High-voltage direct-current transmission has the advantages of large transmission capacity, long transmission distance, low line cost and low power loss. The high-voltage direct-current cable and the accessories are used as a physical foundation and key equipment for constructing the direct-current power grid and are an important foundation for constructing and developing the direct-current power grid. Since the dc cable accessory is a coaxial layered structure with different insulators. The large difference in conductivity between the main insulation of the cable, such as crosslinked polyethylene (XLPE), and the reinforcing insulation, such as Ethylene Propylene Diene Monomer (EPDM) or Silicone Rubber (SR), results in severe distortion of the electric field at the interface between the two and at the root of the stress cone, resulting in a local electric field greater than its breakdown field and ultimately breakdown. An effective solution to this problem is to change the conductivity of the insulation material of the cable accessory to solve the problem of non-uniform electric field distribution.
The liquid silicone rubber has excellent electrical insulation performance and elastic performance. Good oxidation resistance, heat resistance, acid and alkali resistance and the like, and is widely applied to high-voltage alternating-current cable accessories. But the modified nano-material is used as a DC cable accessory, so that the conductivity of the modified nano-material is always smaller than that of DC XLPE insulation when the conductivity changes with temperature and electric field intensity. Since liquid silicone rubber is sensitive to powder filling, a large amount of agglomeration is easily generated after mixing, and a problem of severe viscosity rise is caused by large-amount filling, modification production is difficult, and an effective production preparation method needs to be researched.
Content of application
The application provides a preparation method of liquid silicone rubber, which can ensure that inorganic material powder is fully and uniformly filled in the liquid silicone rubber, and keep good flowing property.
The following technical scheme is adopted in the application:
the application provides a preparation method of liquid silicone rubber, which comprises the following steps:
mixing 86.1 parts by mass of the component A with 13.9 parts by mass of copper calcium titanate powder to obtain a first mixture;
mixing 86.1 parts by mass of the component B with 13.9 parts by mass of copper calcium titanate powder to obtain a second mixture;
and mixing the first mixture and the second mixture to obtain the liquid silicone rubber.
Further, 86.1 parts by mass of the a component was mixed with 13.9 parts by mass of a copper calcium titanate powder, including:
adding 86.1 parts by mass of the component A and 6.95 parts by mass of copper calcium titanate powder into a disperser, stirring at the rotating speed of 100r/min for 30min, adding 6.95 parts by mass of copper calcium titanate powder into the disperser, stirring at the rotating speed of 100r/min for 30min, stirring at the rotating speed of 200r/min for 60min, and vacuumizing the disperser for 20 min.
Further, 86.1 parts by mass of the A component was mixed with 13.9 parts by mass of the calcium copper titanate powder at a temperature of 80 ℃ or lower.
Further, after evacuating the dispenser for 20min, the product in the dispenser was filtered using a 2000 mesh screen.
Further, 86.1 parts by mass of the B component was mixed with 13.9 parts by mass of a copper calcium titanate powder, including:
adding 86.1 parts by mass of the component B and 6.95 parts by mass of copper calcium titanate powder into a disperser, stirring at the rotating speed of 100r/min for 30min, adding 6.95 parts by mass of copper calcium titanate powder into the disperser, stirring at the rotating speed of 100r/min for 30min, stirring at the rotating speed of 200r/min for 60min, and vacuumizing the disperser for 20 min.
Further, 86.1 parts by mass of the B component was mixed with 13.9 parts by mass of the calcium copper titanate powder at a temperature of 80 ℃ or less.
Further, after evacuating the dispenser for 20min, the product in the dispenser was filtered using a 2000 mesh screen.
Further, mixing the first mix and the second mix, comprising: the first mixture and the second mixture are added into a charging basket and then stirred for 30min at a speed of 200r/min under vacuum.
Further, the viscosity of the liquid silicone rubber is not more than 200000mPas, the shoreA hardness is 38, and the tensile strength is 8N/mm 2 600% elongation at break, 26N/mm tear strength, 23kV/mm dielectric strength, and 5X 10 volume resistivity 15 Omega cm, tracking resistance of 1A 4.5.
Further, the particle size of the calcium copper titanate powder was 1.6. mu.m.
Compared with the prior art, the method has the following beneficial effects:
by adopting the method, the copper calcium titanate powder and the high-viscosity liquid silicone rubber finished product can be well mixed, the mixed copper calcium titanate powder particles are uniformly filled, the agglomeration degree is small, and the bubbles are few, so that the performance of the modified liquid silicone rubber material reaches the design requirement, the good flowing performance can be ensured, and the vacuum injection molding of large products is facilitated.
Detailed description of the preferred embodiment
The technical method in the embodiments of the present application will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a preparation method of liquid silicone rubber, in particular to a preparation method of direct-current liquid silicone rubber, which comprises the following steps:
step one, preparing a component A and a component B of liquid silicone rubber and copper calcium titanate powder.
Alternatively, the liquid silicone rubber has a viscosity of 200000mPas or less, a Shore A hardness of 38 (that is, a measurement of 38 on a Shore A durometer), and a tensile strength of 8N/mm 2 600% elongation at break, 26N/mm tear strength, 23kV/mm dielectric strength, and 5X 10 volume resistivity 15 Omega cm, tracking resistance of 1A 4.5. The arrangement ensures that the liquid silicone rubber has good electrical insulation performance and mechanical performance.
The liquid silicone rubber is also called two-component addition silicone rubber and comprises a component A and a component B, wherein the component A and the component B are separately stored in the storage process of the liquid silicone rubber. In addition, the component A and the component B of different manufacturers may be different, for example, the composition formula of the component A may include 100 parts by mass of a base adhesive and 0.1-0.5 part by mass of a platinum complex, wherein the composition formula of the base adhesive may include 5-50 parts by mass of polysiloxane I, 10-30 parts by mass of polysiloxane II, 1-10 parts by mass of polysiloxane III, 10-30 parts by mass of silicon dioxide and 15-35 parts by mass of a high temperature resistant additive. In this case, the formulation of the component B may include 100 parts by mass of the base rubber, 1 to 10 parts by mass of hydrogen-containing polysiloxane, and 0.02 to 0.2 part by mass of an alkynol inhibitor. Or the formula of the component A can comprise 20-90 parts by mass of vinyl silicone oil and 10-80 parts by mass of hydrogen-containing silicone oil. In this case, the formulation of the B component may include 40 to 70 parts by mass of the vinyl silicone oil, 30 to 60 parts by mass of the liquid silicone resin, and 3 to 50ppm of the catalyst. Or the formulation of the a-component may include: 30-75 parts of polydimethylsiloxane-based adhesive containing two or more vinyl groups, 15-35 parts of fumed silica, 1-2 parts of surface modifier, 5-15 parts of PEEK resin and 0.03-0.05 part of platinum catalyst. In this case, the formulation of the B component may include 0.01 to 0.3 part by mass of the inhibitor and 10 to 20 parts by mass of the Si-H group-containing crosslinking agent. The component A and the component B are not limited in the application.
Alternatively, the calcium copper titanate powder has a particle size of 1.6 μm. The CCTO powder is well and uniformly filled in the liquid silicon rubber by the arrangement.
And step two, mixing 86.1 parts by mass of the component A with 13.9 parts by mass of copper calcium titanate powder to obtain a first mixture.
Wherein, 86.1 parts by mass of the component A and 13.9 parts by mass of copper calcium titanate powder are mixed, and the components can be: adding 86.1 parts by mass of the component A and 6.95 parts by mass of copper calcium titanate powder into a disperser, stirring at the rotating speed of 100r/min for 30min, adding 6.95 parts by mass of copper calcium titanate powder into the disperser, stirring at the rotating speed of 100r/min for 30min, stirring at the rotating speed of 200r/min for 60min, and vacuumizing the disperser for 20 min. The disperser may be a 200L planetary disperser, which requires cleaning and drying before use.
86.1 parts by mass of the A component and 13.9 parts by mass of the calcium copper titanate powder may be mixed at a temperature of 80 ℃ or less.
After 20min of evacuation of the disperser, the product in the disperser can be filtered using a 2000 mesh screen. After filtration, it may be filled and sealed for storage.
And step three, mixing 86.1 parts by mass of the component B with 13.9 parts by mass of copper calcium titanate powder to obtain a second mixture.
Mixing 86.1 parts by mass of the component B with 13.9 parts by mass of copper calcium titanate powder, wherein the weight ratio of the components B to the calcium titanate powder can be as follows: adding 86.1 parts by mass of the component B and 6.95 parts by mass of copper calcium titanate powder into a disperser, stirring at the rotating speed of 100r/min for 30min, adding 6.95 parts by mass of copper calcium titanate powder into the disperser, stirring at the rotating speed of 100r/min for 30min, stirring at the rotating speed of 200r/min for 60min, and vacuumizing the disperser for 20 min. The disperser may be a 200L planetary disperser, which requires cleaning and drying before use.
86.1 parts by mass of the B component and 13.9 parts by mass of the calcium copper titanate powder may be mixed at a temperature of 80 ℃ or less.
After 20min of evacuation of the disperser, the product in the disperser can be filtered using a 2000 mesh screen. After filtration, it may be filled and sealed for storage.
And step four, mixing the first mixture and the second mixture to obtain the liquid silicone rubber.
Wherein, mixing the first mixture and the second mixture can be: the first mixture and the second mixture are added into a charging basket and then stirred for 30min at a speed of 200r/min under vacuum. The charging basket can be a direct current cable accessory charging basket. The device discharges air bubbles in the liquid silicone rubber in a mechanical stirring mode, so that the copper calcium titanate powder is uniformly dispersed in the liquid silicone rubber, and the direct-current cable accessory can be processed and manufactured.
The technical scheme and the beneficial effects of the application are further explained by combining the embodiment.
Example one
Step one, preparing a component A and a component B of liquid silicon rubber and copper calcium titanate powder.
And step two, adding 86.1 parts by mass of the component A of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a stirring planetary disperser at the temperature of less than 80 ℃, and stirring for 30min at the rotating speed of 100 r/min.
And step three, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into the stirring planetary disperser, stirring at the rotating speed of 100r/min for 30min, and then stirring at the rotating speed of 200r/min for 60 min.
And step four, vacuumizing the stirring planetary disperser for 20 min.
And step five, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain a first mixture.
And step six, adding 86.1 parts by mass of the component B of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a stirring planetary disperser at the temperature of less than 80 ℃, and stirring for 30min at the rotating speed of 100 r/min.
And step seven, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into the stirring planetary disperser, stirring at the rotating speed of 100r/min for 30min, and then stirring at the rotating speed of 200r/min for 60 min.
And step eight, vacuumizing the stirring planetary disperser for 20 min.
And step nine, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain a second mixture.
Step ten, adding the first mixture and the second mixture into a charging basket, and then stirring for 30min at a speed of 200r/min under a vacuum condition to obtain the liquid silicone rubber.
The liquid silicone rubber obtained in the embodiment is injected into a mold, and the mold is placed into a flat vulcanizing machine to be subjected to high-temperature vulcanization molding treatment and secondary vulcanization treatment, so that a vulcanized solid silicone rubber flat plate sample is obtained.
EXAMPLE two (liquid silicone rubber two-component and small particle size copper calcium titanate powder mixed separately)
Step one, preparing a component A and a component B of liquid silicone rubber and copper calcium titanate powder.
And step two, adding 86.1 parts by mass of the component A of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 0.4 mu m into a planetary disperser for stirring, and stirring at the rotating speed of 100r/min for 30 min.
And step three, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 0.4 mu m into a planetary disperser for stirring, stirring at the rotating speed of 100r/min for 30min, and then stirring at the rotating speed of 200r/min for 60 min.
And step four, vacuumizing the stirring planetary disperser for 20 min.
And step five, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain a first mixture.
And step six, adding 86.1 parts by mass of the component B of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 0.4 mu m into a planetary disperser for stirring, and stirring for 30min at the rotating speed of 100 r/min.
And step seven, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 0.4 mu m into the stirring planetary disperser, stirring at the rotating speed of 100r/min for 30min, and then stirring at the rotating speed of 200r/min for 60 min.
And step eight, vacuumizing the stirring planetary disperser for 20 min.
And step nine, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain a second mixture.
And step ten, adding the first mixture and the second mixture into a charging basket, and stirring for 30min at a speed of 200r/min under a vacuum condition to obtain the liquid silicone rubber.
The liquid silicone rubber obtained in the embodiment is injected into a mold, and the mold is placed into a flat vulcanizing machine to be subjected to high-temperature vulcanization molding treatment and secondary vulcanization treatment, so that a vulcanized solid silicone rubber flat plate sample is obtained.
EXAMPLE III (high speed mixing of liquid Silicone rubber two-component with calcium copper titanate powder separately)
Step one, preparing a component A and a component B of liquid silicone rubber and copper calcium titanate powder.
And step two, adding 86.1 parts by mass of the component A of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a planetary disperser for stirring, and stirring at the rotating speed of 200r/min for 60 min.
And step three, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a planetary disperser for stirring, and then stirring at a high speed of 300r/min for 60 min.
And step four, vacuumizing the stirring planetary disperser for 20 min.
And step five, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain a first mixture.
And step six, adding 86.1 parts by mass of the component B of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a planetary disperser for stirring, and stirring at the rotating speed of 200r/min for 60 min.
And step seven, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into the stirring planetary disperser, and then stirring at a high speed of 300r/min for 60 min.
And step eight, vacuumizing the stirring planetary disperser for 20 min.
And step nine, filtering the product in the planetary disperser for stirring by adopting a 2000-mesh filter screen to obtain a second mixture.
Step ten, adding the first mixture and the second mixture into a charging basket, and then stirring for 30min at a speed of 200r/min under a vacuum condition to obtain the liquid silicone rubber.
The liquid silicone rubber obtained in the embodiment is injected into a mold, and the mold is placed into a flat vulcanizing machine to be subjected to high-temperature vulcanization molding treatment and secondary vulcanization treatment, so that a vulcanized solid silicone rubber flat plate sample is obtained.
EXAMPLE four (liquid silicone rubber two-component and copper calcium titanate powder each mixed for a long time)
Step one, preparing a component A and a component B of liquid silicone rubber and copper calcium titanate powder.
And step two, adding 86.1 parts by mass of the component A of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a planetary disperser for stirring, and stirring at the rotating speed of 100r/min for 60 min.
And step three, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a planetary disperser for stirring, stirring at the rotating speed of 100r/min for 60min, and then stirring at the rotating speed of 200r/min for 120 min.
And step four, vacuumizing the stirring planetary disperser for 20 min.
And step five, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain a first mixture.
And step six, adding 86.1 parts by mass of the component B of the liquid silicone rubber and 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into a planetary disperser for stirring, and stirring at the rotating speed of 100r/min for 60 min.
And step seven, adding 6.95 parts by mass of copper calcium titanate powder with the particle size of 1.6 mu m into the stirring planetary disperser, stirring at the rotating speed of 100r/min for 60min, and then stirring at the rotating speed of 200r/min for 120 min.
And step eight, vacuumizing the stirring planetary disperser for 20 min.
And step nine, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain a second mixture.
Step ten, adding the first mixture and the second mixture into a charging basket, and then stirring for 30min at a speed of 200r/min under a vacuum condition to obtain the liquid silicone rubber.
The liquid silicone rubber obtained in the embodiment is injected into a mold, and the mold is placed into a flat vulcanizing machine to be subjected to high-temperature vulcanization molding treatment and secondary vulcanization treatment, so that a vulcanized solid silicone rubber flat plate sample is obtained.
Comparative example one (liquid silicone rubber two-component direct mixing)
Step one, preparing a component A and a component B of liquid silicone rubber.
And step two, adding the component A and the component B of the liquid silicone rubber into a charging basket, and then stirring under a vacuum condition until the components are uniformly mixed to obtain the liquid silicone rubber.
And injecting the liquid silicon rubber obtained in the comparative example into a mold, and putting the mold into a flat vulcanizing instrument for high-temperature vulcanization molding treatment and secondary vulcanization treatment to obtain a vulcanized solid silicon rubber flat plate sample.
Comparative example two (liquid silicone rubber two-component and copper calcium titanate powder directly mixed)
Step one, preparing a component A and a component B of liquid silicone rubber and copper calcium titanate powder.
And step two, adding 86.1 parts by mass of the component A of the liquid silicone rubber, 86.1 parts by mass of the component B of the liquid silicone rubber and 27.8 parts by mass of the copper calcium titanate powder with the particle size of 1.6 mu m into a planetary disperser for stirring, stirring at the rotating speed of 100r/min for 30min, and then stirring at the rotating speed of 200r/min for 60 min.
And step three, vacuumizing the stirring planetary disperser for 20 min.
And step four, filtering the product in the stirring planetary disperser by using a 2000-mesh filter screen to obtain the liquid silicone rubber.
And injecting the liquid silicon rubber obtained in the comparative example into a mold, and putting the mold into a flat vulcanizing instrument for high-temperature vulcanization molding treatment and secondary vulcanization treatment to obtain a vulcanized solid silicon rubber flat plate sample.
Test examples
The liquid silicone rubber and solid silicone rubber flat samples obtained in the examples and comparative examples were tested and the results are shown in the following table:
as can be seen from the table above:
according to the test results of the comparative example I and the comparative example II, when the preparation method of directly mixing the two components of the liquid silicone rubber and the copper calcium titanate powder is adopted, the viscosity of the mixture is greatly increased, and the two components are rapidly cured, so that the preparation method is not as late as the processing and preparation of the direct-current cable accessory.
From the test results of the first example, the second example, the third example and the fourth example, it can be seen that, when the calcium copper titanate powder with a smaller particle size is used in the preparation method of the present application, the agglomeration phenomenon of the particles occurs in the mixture, and besides the viscosity is increased, the electrical and mechanical properties of the finally formed solid silicone rubber sample have a significant tendency to decrease. When a higher stirring speed and a longer stirring time are adopted, the viscosity of the solid silicon rubber sample is increased, and the electrical and mechanical properties are reduced.
By comprehensively considering all performance indexes, the first embodiment of the application has proper processing viscosity, excellent direct-current dielectric strength, direct-current conductivity, dielectric loss factor and tear strength and superior performance. In addition, the electric conductivity of the liquid silicone rubber can be well matched with that of a direct-current XLPE material, so that space charge migration under a direct-current electric field is effectively inhibited, and the reliability of a high-voltage direct-current cable accessory is improved.
The foregoing shows and describes the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the application, and that various changes and modifications may be made without departing from the spirit and scope of the application, which is defined by the appended claims, the specification, and equivalents thereof.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.
Claims (10)
1. A preparation method of liquid silicone rubber is characterized by comprising the following steps:
mixing 86.1 parts by mass of the component A with 13.9 parts by mass of copper calcium titanate powder to obtain a first mixture;
mixing 86.1 parts by mass of the component B with 13.9 parts by mass of the copper calcium titanate powder to obtain a second mixture;
and mixing the first mixture and the second mixture to obtain the liquid silicone rubber.
2. The production method according to claim 1, wherein 86.1 parts by mass of the a component is mixed with 13.9 parts by mass of the calcium copper titanate powder, and comprises:
adding 86.1 parts by mass of the component A and 6.95 parts by mass of copper calcium titanate powder into a disperser, stirring at the rotating speed of 100r/min for 30min, adding 6.95 parts by mass of the copper calcium titanate powder into the disperser, stirring at the rotating speed of 100r/min for 30min, stirring at the rotating speed of 200r/min for 60min, and vacuumizing the disperser for 20 min.
3. The method according to claim 1, wherein the reaction mixture,
86.1 parts by mass of the A component and 13.9 parts by mass of the copper calcium titanate powder were mixed at a temperature of 80 ℃ or lower.
4. The method according to claim 1, wherein the reaction mixture,
after the disperser was evacuated for 20min, the product in the disperser was filtered using a 2000 mesh screen.
5. The production method according to claim 1, wherein 86.1 parts by mass of the B component is mixed with 13.9 parts by mass of the calcium copper titanate powder, and comprises:
adding 86.1 parts by mass of the component B and 6.95 parts by mass of the copper calcium titanate powder into a disperser, stirring at the rotating speed of 100r/min for 30min, adding 6.95 parts by mass of the copper calcium titanate powder into the disperser, stirring at the rotating speed of 100r/min for 30min, stirring at the rotating speed of 200r/min for 60min, and vacuumizing the disperser for 20 min.
6. The method according to claim 5,
86.1 parts by mass of the B component and 13.9 parts by mass of the calcium copper titanate powder were mixed at a temperature of 80 ℃ or lower.
7. The method according to claim 5,
and after the disperser is vacuumized for 20min, filtering the product in the disperser by using a 2000-mesh filter screen.
8. The method according to claim 5,
mixing the first mix and the second mix, comprising:
adding the first mixed material and the second mixed material into a charging basket, and then stirring for 30min at a speed of 200r/min under a vacuum condition.
9. The method according to claim 1, wherein the reaction mixture,
the viscosity of the liquid silicone rubber is less than or equal to 200000mPas, the shoreA hardness is 38, and the tensile strength is 8N/mm 2 600% elongation at break, 26N/mm tear strength, 23kV/mm dielectric strength, and 5X 10 volume resistivity 15 Omega cm, tracking resistance of 1A 4.5.
10. The method according to claim 1, wherein the reaction mixture,
the particle size of the calcium copper titanate powder is 1.6 mu m.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504540A (en) * | 2011-11-09 | 2012-06-20 | 河南电力试验研究院 | High-dielectric-constant silicon rubber and preparation method thereof |
| CN108017913A (en) * | 2018-01-09 | 2018-05-11 | 哈尔滨理工大学 | A kind of silicon rubber base direct current cables APPENDIX MATERIALSThe and preparation method thereof |
| CN108017914A (en) * | 2018-01-09 | 2018-05-11 | 哈尔滨理工大学 | A kind of silicon rubber based non-linear cable accessory material and preparation method thereof |
| WO2020232691A1 (en) * | 2019-05-23 | 2020-11-26 | 深圳先进技术研究院 | Flexible material used for capacitors, preparation method therefor and printed circuit board |
-
2021
- 2021-10-08 CN CN202111171085.6A patent/CN114806177A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504540A (en) * | 2011-11-09 | 2012-06-20 | 河南电力试验研究院 | High-dielectric-constant silicon rubber and preparation method thereof |
| CN108017913A (en) * | 2018-01-09 | 2018-05-11 | 哈尔滨理工大学 | A kind of silicon rubber base direct current cables APPENDIX MATERIALSThe and preparation method thereof |
| CN108017914A (en) * | 2018-01-09 | 2018-05-11 | 哈尔滨理工大学 | A kind of silicon rubber based non-linear cable accessory material and preparation method thereof |
| WO2020232691A1 (en) * | 2019-05-23 | 2020-11-26 | 深圳先进技术研究院 | Flexible material used for capacitors, preparation method therefor and printed circuit board |
Non-Patent Citations (2)
| Title |
|---|
| 刘宗喜等: "基于增强绝缘材料非线性电导率的特高压直流电缆接头优化设计研究", 绝缘材料, vol. 54, no. 8, pages 74 - 82 * |
| 魏力强等: "钛酸铜钙/硅橡胶复合介质电性能及仿真分析", 绝缘材料, vol. 54, no. 7, pages 179 - 30 * |
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