CN112795087B - Low-carbon residue insulating layer material for electric control solid propellant electrode and preparation method thereof - Google Patents
Low-carbon residue insulating layer material for electric control solid propellant electrode and preparation method thereof Download PDFInfo
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- CN112795087B CN112795087B CN202011595061.9A CN202011595061A CN112795087B CN 112795087 B CN112795087 B CN 112795087B CN 202011595061 A CN202011595061 A CN 202011595061A CN 112795087 B CN112795087 B CN 112795087B
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- peroxide
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- 239000000463 material Substances 0.000 title claims abstract description 41
- 239000004449 solid propellant Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title description 8
- -1 polypropylene Polymers 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000004698 Polyethylene Substances 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 10
- 229920000573 polyethylene Polymers 0.000 claims abstract description 10
- 229920001155 polypropylene Polymers 0.000 claims abstract description 10
- 150000002978 peroxides Chemical class 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 10
- 239000005011 phenolic resin Substances 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 6
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 6
- 239000012856 weighed raw material Substances 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 4
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000004695 Polyether sulfone Substances 0.000 claims description 2
- 239000004697 Polyetherimide Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920006393 polyether sulfone Polymers 0.000 claims description 2
- 229920001601 polyetherimide Polymers 0.000 claims description 2
- 150000003505 terpenes Chemical class 0.000 claims description 2
- 235000007586 terpenes Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000011810 insulating material Substances 0.000 abstract description 14
- 239000003380 propellant Substances 0.000 abstract description 13
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 238000005979 thermal decomposition reaction Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000007590 electrostatic spraying Methods 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- 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
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention provides an insulating layer material for a solid propellant, which has excellent comprehensive performance, and comprises the following raw materials in parts by weight: polypropylene: 60 to 90; peroxide: 0.1 to 2.0; tackifying resin: 3 to 10; polyethylene wax: 0.5 to 3.0; white carbon black: 5-20; high temperature resistant resin: 2-8, adding white carbon black into the formula to ensure that no attachments are generated on the surface of the electrode after the insulating material burns, and ensuring the construction of a conductive path between the propellant and the electrode. And materials with different heat resistance grades are added to construct the multi-gradient thermal decomposition temperature of the insulating material, so that the orderly and controllable combustion of the insulating material is ensured.
Description
Technical Field
The invention belongs to the field of materials for solid propellant electrodes, and particularly relates to a low-carbon residue insulating layer material for an electric control solid propellant electrode and a preparation method thereof.
Background
The electric control solid propellant has the characteristics of power-on combustion, power-off extinction, controllable combustion speed and the like, and solves the problems that the traditional solid propellant is difficult to realize multiple ignition and the combustion speed is uncontrollable. The working principle of the electric control solid propellant is that the solid propellant contacts with the electrode to form a conductive path, and proper voltage is input to burn the propellant. In order to realize the functions of burning the propellant when the propellant is electrified and extinguishing the propellant when the propellant is powered off, a layer of insulating material needs to be coated on the electrode. The insulating material is required to have high insulation properties and to have an insulating effect between the electrode and the propellant.
In the prior art, the Chinese patent with the application number of 201610916774.8 discloses a process method for preparing an electrically-controlled solid propellant electrode insulating material by using phenolic resin, and the method comprises the steps of coating phenolic resin paint on the surface of an electrode after surface treatment, drying at 50-120 ℃ and plasticizing and forming at 180-350 ℃ to obtain the electrode insulating material, however, although the phenolic resin has better electrical insulation, the scheme does not realize the requirement of reducing the carbon residue rate, so that the carbon residue rate of the scheme is high, and the usability is affected.
The Chinese patent with application number 201610915846.7 discloses a high-temperature-resistant and strong-acid-corrosion-resistant insulating material for an electric control solid propellant electrode, which adopts polytetrafluoroethylene suspension, epoxy resin, polyphenylene sulfide, polyimide and other materials as main components, so that the material can resist instantaneous high temperature and strong acid corrosion. However, the problem of high carbon residue rate also exists, which affects further new energy use.
How to provide an insulating layer material for solid propellant with excellent comprehensive properties is still a current research hot spot and difficulty.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an insulating layer material for a solid propellant, which has excellent comprehensive performance.
The insulating layer material comprises the following raw materials in parts by mass:
polypropylene: 60 to 90;
peroxide: 0.1 to 2.0;
tackifying resin: 3 to 10;
polyethylene wax: 0.5 to 3.0;
white carbon black: 5-20;
high temperature resistant resin: 2-8.
The research and development show that the insulating layer material for the solid propellant not only needs to have better insulating performance, but also needs to have less attachment on the surface of the electrode after the insulating material burns, and does not influence the conductivity between the propellant and the bare electrode. At the same time, the insulating material is required to burn at a rate greater than the propellant so as to ensure contact between the propellant and the exposed electrode to form a conductive path.
By adopting the system, not only insulating performance is considered, but also surface attachments of the insulating layer materials after combustion are effectively reduced, and simultaneously, the insulating layer materials are ensured to have higher combustion speed relative to the propellant.
Further, the insulating layer material comprises the following raw materials in parts by weight:
polypropylene: 70-80 parts;
peroxide: 0.1 to 2.0;
tackifying resin: 5 to 8;
polyethylene wax: 0.5 to 3.0;
white carbon black: 6 to 15;
high temperature resistant resin: 2-8.
Further, the insulating layer material comprises the following raw materials in parts by weight:
polypropylene: 70-80 parts;
peroxide: 0.1 to 2.0;
tackifying resin: 5 to 8;
polyethylene wax: 0.5 to 3.0;
white carbon black: 6 to 15;
high temperature resistant resin: 5-8.
In the insulating layer material, the peroxide is one or more of di-tert-butyl peroxide and dicumyl peroxide.
In the insulating layer material, the tackifying resin is one or more of rosin, terpene resin, petroleum resin and alkyl phenolic resin.
In the insulating layer material, the high-temperature resistant resin is: one or more of polyimide, polyether-ether-ketone, polyphenylene sulfide, polyether sulfone, polyether imide and phenolic resin.
Further preferably, the material state is preferably a powder.
The invention also provides a preparation method of the insulating layer material, which comprises the following steps:
(1) And uniformly mixing the weighed raw materials of all components, and adding the mixture into a double-screw extruder for extrusion granulation.
(2) The extruded pellets were dried and then crushed and ground and sieved through a 120 mesh screen.
Compared with the prior art, the invention has the following beneficial effects:
1. white carbon black is added in the formula to ensure that no attachments are attached to the surface of the electrode after the insulating material burns, and the construction of a conductive path between the propellant and the electrode is ensured.
2. And materials with different heat resistance grades are added to construct the multi-gradient thermal decomposition temperature of the insulating material, so that the orderly and controllable combustion of the insulating material is ensured.
3. The system not only gives consideration to the insulation performance, but also effectively reduces the surface attachments of the insulating layer material after burning, and simultaneously ensures that the insulating layer material has higher burning speed relative to the propellant.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that several modifications can be made by one skilled in the art without departing from the inventive concept. These are all within the scope of the present invention. For process parameters not specifically noted, reference may be made to conventional techniques.
Example 1
The low carbon residue insulating layer material for the electric control solid propellant electrode and the preparation method thereof comprise the following raw materials in percentage by mass:
polypropylene: 60;
dicumyl peroxide: 1, a step of;
rosin: 10;
polyethylene wax: 1, a step of;
white carbon black: 20, a step of;
polyphenylene sulfide: 8, 8;
stirring the weighed raw materials of each component in a high-speed stirrer for 3 minutes, and adding the mixed materials into a double-screw extruder for extrusion granulation, wherein the extrusion process parameters are as follows: the temperature of the first area is 120-140 ℃, the temperature of the second area is 140-160 ℃, the temperature of the third area is 150-170 ℃, the temperature of the fourth area is 170-180 ℃, the temperature of the fifth area is 170-190 ℃, the temperature of the sixth area is 170-190 ℃ and the temperature of the machine head is 160-180 ℃. The rotating speed of the host machine is 180-300 r/min. The extruded pellets were dried and then crushed and ground and sieved through a 120 mesh screen. And (3) filling the sieved powder into a powder barrel of an electrostatic spray gun, spraying the powder on the surface of the electrode according to an electrostatic spraying process, and then placing the electrode into a baking oven at 180-210 ℃ for plasticizing for 2-5min to obtain the electrode with the insulating layer.
Example 2
The low carbon residue insulating layer material for the electric control solid propellant electrode and the preparation method thereof comprise the following raw materials in percentage by mass:
polypropylene: 80;
di-t-butyl peroxide: 2.0;
petroleum resin: 3, a step of;
polyethylene wax: 2;
white carbon black: 8, 8;
polyetheretherketone: 5, a step of;
stirring the weighed raw materials of each component in a high-speed stirrer for 3 minutes, and adding the mixed materials into a double-screw extruder for extrusion granulation, wherein the extrusion process parameters are as follows: the temperature of the first area is 120-140 ℃, the temperature of the second area is 140-160 ℃, the temperature of the third area is 150-170 ℃, the temperature of the fourth area is 170-180 ℃, the temperature of the fifth area is 170-190 ℃, the temperature of the sixth area is 170-190 ℃ and the temperature of the machine head is 160-180 ℃. The rotating speed of the host machine is 180-300 r/min. The extruded pellets were dried and then crushed and ground and sieved through a 120 mesh screen. And (3) filling the sieved powder into a powder barrel of an electrostatic spray gun, spraying the powder on the surface of the electrode according to an electrostatic spraying process, and then placing the electrode into a baking oven at 180-210 ℃ for plasticizing for 2-5min to obtain the electrode with the insulating layer.
Comparative example 1
An insulating layer material and a preparation method thereof comprise the following raw materials in percentage by mass:
polypropylene: 80;
dicumyl peroxide: 1, a step of;
rosin: 10;
polyethylene wax: 1, a step of;
polyphenylene sulfide: 8, 8;
stirring the weighed raw materials of each component in a high-speed stirrer for 3 minutes, and adding the mixed materials into a double-screw extruder for extrusion granulation, wherein the extrusion process parameters are as follows: the temperature of the first area is 120-140 ℃, the temperature of the second area is 140-160 ℃, the temperature of the third area is 150-170 ℃, the temperature of the fourth area is 170-180 ℃, the temperature of the fifth area is 170-190 ℃, the temperature of the sixth area is 170-190 ℃ and the temperature of the machine head is 160-180 ℃. The rotating speed of the host machine is 180-300 r/min. The extruded pellets were dried and then crushed and ground and sieved through a 120 mesh screen. And (3) filling the sieved powder into a powder barrel of an electrostatic spray gun, spraying the powder on the surface of the electrode according to an electrostatic spraying process, and then placing the electrode into a baking oven at 180-210 ℃ for plasticizing for 2-5min to obtain the electrode with the insulating layer.
Comparative example 2
An insulating layer material and a preparation method thereof comprise the following raw materials in percentage by mass:
polyphenylene sulfide: 80;
white carbon black: 20, a step of;
stirring the weighed raw materials of each component in a high-speed stirrer for 3 minutes, and adding the mixed materials into a double-screw extruder for extrusion granulation, wherein the extrusion process parameters are as follows: the temperature of the first area is 260-270 ℃, the temperature of the second area is 270-280 ℃, the temperature of the third area is 270-290 ℃, the temperature of the fourth area is 290-300 ℃, the temperature of the fifth area is 290-300 ℃, the temperature of the sixth area is 290-300 ℃ and the temperature of the machine head is 300-310 ℃. The rotating speed of the host machine is 180-240 r/min. The extruded pellets were dried and then crushed and ground and sieved through a 120 mesh screen. And (3) filling the sieved powder into a powder barrel of an electrostatic spray gun, spraying the powder on the surface of the electrode according to an electrostatic spraying process, and then placing the electrode into a baking oven at 300-320 ℃ for plasticizing for 2-5min to obtain the electrode with the insulating layer.
The surface resistivity, thermal decomposition temperature of examples 1-2 and comparative examples 1-2 were measured. The insulating layer material was visually inspected after burning.
Thermal decomposition temperature test conditions: the temperature is in the range of room temperature to 800 ℃, the temperature rising rate is 10 ℃/min, and the air is in the air.
As can be seen from the above table, examples 1, 2 and comparative example 2 did not leave black clusters on the electrode surface after the insulating material was burned after the white carbon black was added. Examples 1, 2 and comparative example 1 the insulation materials were provided with different gradient decomposition temperatures by the proportions of the materials of different heat resistance grades, and the insulation layers were gradually decomposed by combustion with the movement of flame position during the solid-propellant combustion.
The above examples merely represent a few embodiments of the present invention, which are described in detail, but are not to be construed as limiting the scope of the invention. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the invention. Accordingly, the scope of the present invention should be determined by the following claims.
Claims (4)
1. The insulating layer material for the electric control solid propellant electrode is characterized by comprising the following raw materials in parts by weight:
polypropylene: 60 to 90;
peroxide: 0.1 to 2.0;
tackifying resin: 3 to 10;
polyethylene wax: 0.5 to 3.0;
white carbon black: 5-20;
high temperature resistant resin: 2-8;
the peroxide is one or more of di-tert-butyl peroxide and dicumyl peroxide;
the tackifying resin is one or more of rosin, terpene resin, petroleum resin and alkyl phenolic resin;
the high-temperature resistant resin comprises the following components: one or more of polyimide, polyether-ether-ketone, polyphenylene sulfide, polyether sulfone, polyether imide and phenolic resin;
the material state is a powder state.
2. An insulating layer material for an electronically controlled solid propellant electrode as claimed in claim 1, wherein: the insulating layer material comprises the following raw materials in parts by mass:
polypropylene: 70-80 parts;
peroxide: 0.1 to 2.0;
tackifying resin: 5 to 8;
polyethylene wax: 0.5 to 3.0;
white carbon black: 6 to 15;
high temperature resistant resin: 2-8.
3. An insulating layer material for an electronically controlled solid propellant electrode as claimed in claim 1, wherein: the insulating layer material comprises the following raw materials in parts by mass:
polypropylene: 70-80 parts;
peroxide: 0.1 to 2.0;
tackifying resin: 5 to 8;
polyethylene wax: 0.5 to 3.0;
white carbon black: 6 to 15;
high temperature resistant resin: 5-8.
4. A method for producing the insulating layer material according to any one of claims 1 to 3, characterized in that the method comprises the steps of:
(1) Uniformly mixing the weighed raw materials of all components, and adding the mixture into a double-screw extruder for extrusion granulation;
(2) The extruded pellets were dried and then crushed and ground and sieved through a 120 mesh screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595061.9A CN112795087B (en) | 2020-12-28 | 2020-12-28 | Low-carbon residue insulating layer material for electric control solid propellant electrode and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595061.9A CN112795087B (en) | 2020-12-28 | 2020-12-28 | Low-carbon residue insulating layer material for electric control solid propellant electrode and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112795087A CN112795087A (en) | 2021-05-14 |
| CN112795087B true CN112795087B (en) | 2024-01-19 |
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| CN202011595061.9A Active CN112795087B (en) | 2020-12-28 | 2020-12-28 | Low-carbon residue insulating layer material for electric control solid propellant electrode and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410124A (en) * | 1980-03-31 | 1983-10-18 | Hilti Aktiengesellschaft | Method of manufacturing a firing electrode |
| CN106380954A (en) * | 2016-10-21 | 2017-02-08 | 重庆大学 | Insulating material with high temperature resistance and strong acid corrosion resistance for electric control solid propellant electrode |
| CN106497304A (en) * | 2016-10-21 | 2017-03-15 | 重庆大学 | Phenolic resin prepares the process of automatically controlled solid propellant electrode insulation material |
| CN106497305A (en) * | 2016-10-21 | 2017-03-15 | 重庆大学 | A kind of automatically controlled solid propellant electrode soaked-plastic product and preparation method thereof |
| CN106987104A (en) * | 2017-06-08 | 2017-07-28 | 合肥峰腾节能科技有限公司 | A kind of preparation method of environment-friendlyinsulation insulation material |
| CN109054169A (en) * | 2018-06-20 | 2018-12-21 | 安徽瑞鑫自动化仪表有限公司 | A kind of hydrospace detection polypropylene cable Insulation Material |
-
2020
- 2020-12-28 CN CN202011595061.9A patent/CN112795087B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410124A (en) * | 1980-03-31 | 1983-10-18 | Hilti Aktiengesellschaft | Method of manufacturing a firing electrode |
| CN106380954A (en) * | 2016-10-21 | 2017-02-08 | 重庆大学 | Insulating material with high temperature resistance and strong acid corrosion resistance for electric control solid propellant electrode |
| CN106497304A (en) * | 2016-10-21 | 2017-03-15 | 重庆大学 | Phenolic resin prepares the process of automatically controlled solid propellant electrode insulation material |
| CN106497305A (en) * | 2016-10-21 | 2017-03-15 | 重庆大学 | A kind of automatically controlled solid propellant electrode soaked-plastic product and preparation method thereof |
| CN106987104A (en) * | 2017-06-08 | 2017-07-28 | 合肥峰腾节能科技有限公司 | A kind of preparation method of environment-friendlyinsulation insulation material |
| CN109054169A (en) * | 2018-06-20 | 2018-12-21 | 安徽瑞鑫自动化仪表有限公司 | A kind of hydrospace detection polypropylene cable Insulation Material |
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| CN112795087A (en) | 2021-05-14 |
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Address after: 410205 East of the first floor, 2nd floor, 7th floor, 8th floor, Building B8, Luguyuyuan, No. 27 Wenxuan Road, Changsha High-tech Development Zone, Changsha, Hunan Province Applicant after: Aerospace Science and Industry (Changsha) New Materials Research Institute Co.,Ltd. Address before: 410205 office No.15, aerospace complex, no.217, Fenglin Third Road, Yuelu District, Changsha City, Hunan Province Applicant before: CHANGSHA ADVANCED MATERIALS INDUSTRIAL RESEARCH INSTITUTE Co.,Ltd. |
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