CN102604320A - Preparation method and application of resin composition for thermosetting aramid bulletproof composite material - Google Patents
Preparation method and application of resin composition for thermosetting aramid bulletproof composite material Download PDFInfo
- Publication number
- CN102604320A CN102604320A CN2012100361867A CN201210036186A CN102604320A CN 102604320 A CN102604320 A CN 102604320A CN 2012100361867 A CN2012100361867 A CN 2012100361867A CN 201210036186 A CN201210036186 A CN 201210036186A CN 102604320 A CN102604320 A CN 102604320A
- Authority
- CN
- China
- Prior art keywords
- resin
- polyvinyl butyral
- preparation
- aramid fiber
- thermoset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The invention provides a preparation method of a resin composition for a thermosetting aramid bulletproof composite material, and relates to the field of resin modification. The resin composition comprises 25-50% of phenolic resin, 30-60% of polyvinyl butyral solution, 10-25% of a flexibilizer and 8-12% of a reinforcer. In addition, a silicane coupling agent with an addition rate of 2-5% is adopted to improve the compatibility of the resin and fabrics, and improve the adhesion between the resin and the fabrics. Phosphoric acid is used as a thermal stabilizer to improve the weathering resistance of the resin, and is added at an amount of 1-5%. The components are mixed proportionally to prepare a modified phenolic resin system. The modified phenolic resin thus prepared has the advantages of high toughness, moderate bonding strength, excellent anti-aging property and good stability. According to shooting tests, the aramid bulletproof composite material prepared from the resin composition has the characteristics of high bulletproof performance and large margin of safety, and can significantly improve the safety and reliability of fighters.
Description
Technical field:
The present invention relates to the preparation method of a kind of thermoset aramid fiber ballistic composite, say further, relate to a kind of modifying phenolic resin composition and preparation method thereof with resin combination.
Background technology:
Ballistic composite is the demand cumulative year after year of combatant requisite life protective gear, especially bulletproof halmet.At present, western developed countries such as the U.S., Europe have been equipped high-performance fiber bulletproof composite material, and the development of China's high performance composites is started late, and have certain gap with comparing abroad.
High performance composites, to adopt kevlar fabric to carry out with thermosetting resin bonding more, influences high performance composites and mainly contain two factors: the cohesive strength between the kevlar fabric and the toughness of thermosetting resin.Therefore, research improves the technology of the cohesive strength between the kevlar fabric, and is most important for the high-performance fiber bulletproof composite helmet and armour.
Because the aramid fiber composite material that adopts in the market adopts modified phenolic resins more, and for resin, suitable toughness and cohesive strength thereof for improving aramid fiber composite material, play crucial effects.For phenolic resin system, though its moulding is fast, cost is low, and itself also has certain weakness, and is low like the toughness of resin, be prone to brittle rupture takes place, and cohesive strength is low, temperature tolerance difference etc.Therefore, how to improve the shortcoming of resol, improving the resin over-all properties is to improve the key of resol.For ballistic composite, the cohesive strength of resin must be moderate simultaneously, and cohesive strength is excessive to be prone to cause resin that the fiber cloth specimen is fettered; Make fiber " plasticizing ", cause product to be prone to brittle rupture takes place, and cohesive strength is too small; When being prone to cause shell fragment to puncture matrix material; Slippage between the cloth specimen is unfavorable for the transmission of bullet ability, so the cohesive strength in the matrix material must be moderate.
Summary of the invention:
The objective of the invention is to solve the defective that resol exists, provide a kind of aramid fiber ballistic composite to use the resin combination preparation method, be intended to improve the ballistic performance of existing aramid fiber ballistic composite.The present invention adopts following technical scheme to realize technical purpose:
Aramid fiber bulletproof composite material provided by the invention is used resin combination; Comprise following blend components: a. resol 25%～50%; B. polyvinyl butyral acetal solution 30%～60%, c. toughner 10%～25%, d. toughener 8%～12%; E. coupling agent 2%～5%, d. thermo-stabilizer 1%～5%.
Aramid fiber bulletproof composite material of the present invention adopts resol with the resin combination matrix resin, and resin content is 10%～30%.
Polyvinyl butyral acetal modified phenolic resin lipoprotein solution, it can improve the fragility of resol, improves the mechanical property of matrix material, reduces solidification rate.The present invention adopts polyvinyl butyral acetal (PVB) to carry out modification in order to improve the performance of resol, and this resin can be used as the sandwich material of shatter proof glass, resin fugitive constituent≤1.5%, butyraldehyde base 70%～80%, hydroxyl 15%～20%, acid number≤0.01%.Addition is 30%～60%.
Wherein said polyvinyl butyral acetal solution is to adopt ethanol to dissolve polyvinyl butyral resin, processes 10%～15% resin solution, and the preparation process is following:
1. distinguish weighing polyvinyl alcohol butyral resin, alcoholic acid weight, and calculate gross weight;
2. in ethanolic soln, slowly add polyvinyl butyral resin, constantly stir simultaneously;
3. after treating that polyvinyl butyral resin dissolves fully, take by weighing the gross weight of solution, calculate the difference of twice gross weight;
4. add the ethanol weight of twice difference to solution for continuous, fully mixing.
Suitable toughness plays crucial effects for improving aramid fiber ballistic composite ballistic performance; It can substantially improve the resol brittle failure, and the energy of bullet is fully transmitted, and reaches the effect that disperses the bullet energy; The present invention adopts DOP, and addition is 5%～20%.
For ballistic composite, resin-bonded intensity must be moderate, and cohesive strength is excessive to be prone to cause resin that the fiber cloth specimen is fettered; Make fiber " plasticizing "; Cause product to be prone to brittle rupture takes place, and cohesive strength is too small, when shell fragment punctures composite panel; Be prone to cause the slippage between the cloth specimen, be unfavorable for the transmission of bullet ability.Cohesive strength in the composite panel must be moderate.In order to improve the cohesive strength of resol, the present invention adopts the scheme of adding appropriate dose epoxy resin to improve the cohesive strength of resol, the epoxy equivalent (weight) 160～300g/eq of epoxy resin wherein, and fugitive constituent≤2.0%, addition are 8%～12%.
Because the aramid fiber polar phase is for resin system; Its polar phase is to a little less than; In order to make resin system fully be attached to fabric face, give full play to the effect of each component self, the present invention adopts and adds the silane coupling agent scheme; To improve the avidity of resin and fiber, addition is 2%～5%.
For modified phenolic resins of the present invention has weather resistance; Guarantee that material has good scale resistance and high thermal resistance; To satisfy the weathering resistance requirement of ballistic composite; The present invention adopts phosphoric acid as oxidation inhibitor, and addition is 1%～5%, and it mainly acts on is that the phosphorus modified phenolic resins that phosphoric acid and reactive modified phenolic resin generate has excellent weathering resistance in Oxidant.
Evidence, aramid fiber ballistic composite of the present invention has overcome the technological defective of existing usefulness with resin combination, has obtained the excellent aramid fiber ballistic composite of ballistic performance.The interpolation of toughner, toughener; Can obviously improve the snappiness and the cohesiveness of resol, the interpolation of coupling agent has substantially improved the sticking power of fabric and interlaminar resin, thus the surging force of passivation bullet effectively; Through the target practice evidence; Adopt the aramid fiber ballistic composite ballistic performance of this resin combination preparation excellent, safety margin is high, can obviously improve combatant's safe reliability.
Embodiment:
The test of the ballistic performance that adopts in the embodiment of the invention is carried out according to the NIJ0101.04 of United States Justice Department standard, is intended to test the bulletproof performance that adopts the ballistic composite that thermoset aramid fiber ballistic composite of the present invention processes with resin combination.
Below in conjunction with embodiment, further specify the present invention.
Raw material:
Kevlar fabric, Dutch Aksu company, trade mark T750, area density 460g/m
2
Polyvinyl butyral (PVB), the safety glass interlayers material is done by Jiangxi Province Hong Feng plastic cement ltd,
Resin fugitive constituent≤1.5%, butyraldehyde base 75.5%～78.5%, hydroxyl 18%～20%, acid number≤0.008%;
DOP, the precious chemical industry in Lianyun Harbour hundred million ltd, density 0.981～0.986g/m
3
Epoxy resin (E51), Jinan is prone to fill limit company, epoxy equivalent (weight) 184～210g/eq, fugitive constituent≤2.0%;
Silane coupling agent, Danyang City morning twilight coupling agent ltd produces, and the trade mark is KH570, and chemical name is γ-(methacryloxypropyl) propyl trimethoxy silicane;
Industrial alcohol and phosphoric acid, Beijing chemical reagents corporation, technical grade.
Embodiment 1
Take by weighing 110g polyvinyl butyral resin and 890g ethanol at first respectively; In ethanolic soln, slowly add polyvinyl butyral resin and constantly stir, treat that polyvinyl butyral resin dissolves fully after, take by weighing the gross weight of solution; Calculate the difference of twice gross weight; And add the ethanol weight of twice difference to solution for continuous, fully mixing is processed 11% polyvinyl butyral resin solution for standby.
Take by weighing 250g resol, the above-mentioned polyvinyl butyral solution of 500g resin solution, 100g DOP, 100g epoxy resin, 30g silane coupling agent and 20g phosphoric acid, add abundant mixing in the beaker, promptly get modified resin solution.
Above-mentioned modified resin solution is applied to the kevlar fabric surface uniformly, treat that resin dries after, prepreg is cut into 300mm * 300mm square; And 17 layers of cloth specimen are range upon range of, in the pressure testing machine laminated, the setting preload pressure is 1MPa; After the continuous venting 3～5 times; Setting pressure is 12MPa, and molding temperature is 130 ℃, keeps the 30min cooling to take out.Test by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
Embodiment 2
Change the resol among the embodiment 1 into 500g, polyvinyl butyral solution resin solution changes 300g into, and all the other conditions are identical with embodiment 1.Test by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
Embodiment 3
Change resol among the embodiment 1 into 300g, polyvinyl butyral solution resin solution changes 420g into, and DOP changes 150g into, and epoxy resin changes 80g into, and all the other conditions are identical with embodiment 1.Test by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
Embodiment 4
Change polyvinyl butyral acetal solution among the embodiment 1 into 400g, DOP changes 150g into, and silane coupling agent changes 50g into, and phosphoric acid changes 50g into, and all the other conditions are identical with embodiment 1.Test by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
Comparative example 1
Change the resol among the embodiment 1 into 1000g; Other polyvinyl butyral acetal solution, DOP, epoxy resin, silane coupling agent, phosphoric acid all change 0g into; All the other conditions are identical with embodiment 1, test by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
Comparative example 2
Change resol among the embodiment 1 into 280g, silane coupling agent changes 0g into, and all the other conditions are identical with embodiment 1, tests by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
Comparative example 3
Change the resol among the embodiment 1 into 350g, epoxy resin changes 0g into, and all the other conditions are identical with embodiment 1, tests by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
Comparative example 4
Change the resol among the embodiment 1 into 350g, DOP changes 0g into, and all the other conditions are identical with embodiment 1, tests by United States Justice Department's NIJ0101.04 standard with uzi tommy gun, 9mm crust bullet (lead core bullet).Carry out the bulletproof performance test, its result sees table 1.
The ballistic performance contrast table of table 1 preparation matrix material
Claims (9)
1. a thermoset aramid fiber ballistic composite is characterized in that composed of the following components with the preparation method of resin combination:
A. resol 25%～50%
B. polyvinyl butyral acetal solution 30%～60%
C. toughner 10%～25%
D. toughener 8%～12%
E. coupling agent 2%～5%
D. thermo-stabilizer 1%～5%
2. a kind of thermoset aramid fiber according to claim 1 is shellproof compound with the preparation method of material with resin combination, it is characterized in that described polyvinyl butyral acetal solution, and addition is 30%～60%.
3. according to claim 1 and 2 described a kind of thermoset aramid fiber ballistic composites preparation method with resin combination; It is characterized in that described polyvinyl butyral solution is to adopt ethanol to dissolve the polyvinyl butyral resin; Process 10%～15% resin solution, the preparation process is following:
1. distinguish weighing polyvinyl alcohol butyral resin, alcoholic acid weight, and calculate gross weight;
2. in ethanolic soln, slowly add polyvinyl butyral resin, constantly stir simultaneously;
3. after treating that polyvinyl butyral resin dissolves fully, take by weighing the gross weight of solution, calculate the difference of twice gross weight;
4. add the ethanol weight of twice difference to solution for continuous, fully mixing.
4. polyvinyl butyral acetal according to claim 3; It is characterized in that polyvinyl butyral acetal is the resin of safety glass interlayers material, polyvinyl butyral resin fugitive constituent≤1.5%, butyraldehyde base 70%～80%; Hydroxyl 15%～20%, acid number≤0.01%.
5. a kind of thermoset aramid fiber ballistic composite according to claim 1 is characterized in that with the preparation method of resin combination described toughner is DOP, and addition is 5%～20%.
6. a kind of thermoset aramid fiber ballistic composite according to claim 1 is used the resin combination preparation method, it is characterized in that described toughener is an epoxy resin, epoxy equivalent (weight) 160～300g/eq, and fugitive constituent≤2.0%, addition are 8%～12%.
7. a kind of thermoset aramid fiber ballistic composite according to claim 1 is characterized in that with the thing preparation method of resin combination said coupling agent is a silane coupling agent, and addition is 2%～5%.
8. a kind of thermoset aramid fiber ballistic composite according to claim 1 is characterized in that with the preparation method of resin combination described thermo-stabilizer is a phosphoric acid, and addition is 1%～5%.
9. any one said resin combination of aforesaid right requirement 1～9 is used in aramid fiber ballistic composite field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210036186.7A CN102604320B (en) | 2012-02-17 | 2012-02-17 | A kind of preparation method of thermoset aramid bulletproof composite material resin combination and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210036186.7A CN102604320B (en) | 2012-02-17 | 2012-02-17 | A kind of preparation method of thermoset aramid bulletproof composite material resin combination and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102604320A true CN102604320A (en) | 2012-07-25 |
| CN102604320B CN102604320B (en) | 2015-10-14 |
Family
ID=46522124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210036186.7A Active CN102604320B (en) | 2012-02-17 | 2012-02-17 | A kind of preparation method of thermoset aramid bulletproof composite material resin combination and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102604320B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264140A (en) * | 2013-03-20 | 2016-01-20 | 可隆工业株式会社 | High strength fiber composite material, manufacturing method thereof and helmet using the same |
| CN106046780A (en) * | 2016-06-03 | 2016-10-26 | 中蓝晨光化工研究设计院有限公司 | Bulletproofing material with thermoset epoxy resin and preparation method thereof |
| CN106405632A (en) * | 2016-05-23 | 2017-02-15 | 中国科学院地质与地球物理研究所 | High-precision moving-coil geophone |
| CN107011625A (en) * | 2017-04-21 | 2017-08-04 | 山东圣泉新材料股份有限公司 | A kind of resin combination, laminate, prepreg and preparation method thereof, application |
| CN108912601A (en) * | 2018-05-17 | 2018-11-30 | 合肥羿振电力设备有限公司 | A kind of electric switch high strength epoxy resin material |
| CN111457790A (en) * | 2020-04-23 | 2020-07-28 | 北京航天雷特机电工程有限公司 | Soft light bullet-proof vest core piece and manufacturing method thereof |
| CN114351475A (en) * | 2021-12-03 | 2022-04-15 | 西安理工大学 | Preparation method of modified aramid fabric coating material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249469A1 (en) * | 2001-04-11 | 2002-10-16 | Xerox Corporation | Conductive carbon filled polyvinyl buyral adhesive |
| CN1377726A (en) * | 2002-01-11 | 2002-11-06 | 清华大学 | Process for preparing phenolic resin hollow fibre film for auxiliary respirator |
-
2012
- 2012-02-17 CN CN201210036186.7A patent/CN102604320B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249469A1 (en) * | 2001-04-11 | 2002-10-16 | Xerox Corporation | Conductive carbon filled polyvinyl buyral adhesive |
| CN1377726A (en) * | 2002-01-11 | 2002-11-06 | 清华大学 | Process for preparing phenolic resin hollow fibre film for auxiliary respirator |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264140A (en) * | 2013-03-20 | 2016-01-20 | 可隆工业株式会社 | High strength fiber composite material, manufacturing method thereof and helmet using the same |
| CN106405632A (en) * | 2016-05-23 | 2017-02-15 | 中国科学院地质与地球物理研究所 | High-precision moving-coil geophone |
| CN106046780A (en) * | 2016-06-03 | 2016-10-26 | 中蓝晨光化工研究设计院有限公司 | Bulletproofing material with thermoset epoxy resin and preparation method thereof |
| CN106046780B (en) * | 2016-06-03 | 2018-09-25 | 中蓝晨光化工研究设计院有限公司 | Introducing has bullet resistant material of thermosetting epoxy resin and preparation method thereof |
| CN107011625A (en) * | 2017-04-21 | 2017-08-04 | 山东圣泉新材料股份有限公司 | A kind of resin combination, laminate, prepreg and preparation method thereof, application |
| CN108912601A (en) * | 2018-05-17 | 2018-11-30 | 合肥羿振电力设备有限公司 | A kind of electric switch high strength epoxy resin material |
| CN111457790A (en) * | 2020-04-23 | 2020-07-28 | 北京航天雷特机电工程有限公司 | Soft light bullet-proof vest core piece and manufacturing method thereof |
| CN111457790B (en) * | 2020-04-23 | 2021-12-24 | 北京航天雷特机电工程有限公司 | Soft light bullet-proof vest core piece and manufacturing method thereof |
| CN114351475A (en) * | 2021-12-03 | 2022-04-15 | 西安理工大学 | Preparation method of modified aramid fabric coating material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102604320B (en) | 2015-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102604320B (en) | A kind of preparation method of thermoset aramid bulletproof composite material resin combination and application | |
| CN102731969B (en) | Flame retardant epoxy prepreg composite material | |
| CN102731960B (en) | Preparation method of high-toughness flame retardation phenolic prepreg composite material | |
| CN102492140B (en) | Bi-phthalonitrile prepolymer, bi-phthalonitrile prepolymer/epoxy resin copolymer, bi-phthalonitrile prepolymer/epoxy resin cured material , as well as preparation method and application thereof | |
| CN103059559B (en) | The preparation method of a kind of subway tunnel platform high-strength anti-flaming thermoplastic composite and composite sheet thereof | |
| CN103113667A (en) | Continuous long glass fiber reinforced polypropylene/nylon composite material with core layer structure and preparation process thereof | |
| CN105216403A (en) | A kind of preparation method of PVB film interlayer implosion guard | |
| CN103571046A (en) | Ultra-high strength glass fiber reinforced thermoplastic resin composite plate and preparation method thereof | |
| CN105315521A (en) | High-damping material for high-temperature co-curing with composite material and preparation method of high-damping material | |
| CN105269794B (en) | A kind of preparation method of ionic intermediate coat for safety glass | |
| CN113715422A (en) | High-wear-resistance epoxy glass fiber cloth laminated board and preparation method thereof | |
| CN103396615A (en) | High performance crosslinked elastomeric insulation material | |
| CN103172976A (en) | Method for manufacturing helmet by using flame-retardant heat-resistant high-performance hybrid glass fiber prepreg | |
| CN103694695B (en) | A kind of fiber glass reinforced halogen-free flame retardant PA6/PS alloy material and preparation method thereof | |
| CN102941722A (en) | Flame-retardant corrosion-resistant case material, resin transfer molding (RTM) technique thereof and injection molding system | |
| CN103183908A (en) | High-temperature-resistant phenolic moulding compound | |
| CN109775243B (en) | Cold-resistant flame-retardant covering rubber, cold-resistant flame-retardant intermediate rubber, cold-resistant flame-retardant core rubber and cold-resistant flame-retardant steel wire rope core conveying belt | |
| CN103450822A (en) | Thermosetting membrane for adhesion of bulletproof fiber and processing method of thermosetting membrane | |
| CN105968715A (en) | Toughened and modified epoxy resin system for carbon fiber prepreg, preparation method of epoxy resin system, and prepreg prepared from epoxy resin system | |
| CN104744883B (en) | Nano modification flame-proof phenolic plastic and preparation method thereof | |
| CN103183906A (en) | Flame-retardant phenolic glass fibre reinforced plastic composite material | |
| CN104744882B (en) | Nano modification flame-proof phenolic injection molding material and preparation method thereof | |
| CN104861421A (en) | Plate for electric control box and manufacturing method thereof | |
| CN103937216A (en) | Shell powder modified polyphenyl ether material for auto plastic parts | |
| CN104119681B (en) | A kind of fire-resisting cable insulant preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100074 Beijing city in the field of cloud hillock in the city of Fengtai District in the hospital No. 1 Applicant after: BEIJING AEROSPACE RATE MECHANICAL & ELECTRICAL ENGINEERING CO., LTD. Address before: 100074 Beijing city in the field of cloud hillock in the first hospital in Fengtai District Applicant before: Beijing Rate New Technology Corp. |
|
| CB03 | Change of inventor or designer information |
Inventor after: Wu Zhongwei Inventor after: Fang Xinling Inventor after: Liu Yuankun Inventor after: Ai Qingsong Inventor after: Xu Dongmei Inventor after: Fu Liqiang Inventor after: Gao Pei Inventor before: Wu Zhongwei Inventor before: Lv Panke Inventor before: Zhao Yao Inventor before: Wang Ruiling Inventor before: Fu Liqiang Inventor before: Bai Haiyan Inventor before: Zuo Xiangchun Inventor before: Fang Xinling Inventor before: Liu Sheng Inventor before: Gao Hong Inventor before: Liu Yuankun Inventor before: Huang Jiqing Inventor before: Liang Li Inventor before: Pan Zhiyong Inventor before: Zhang Jing |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: BEIJING RATE NEW TECHNOLOGY CORP. TO: BEIJING AEROSPACE RATE MECHANICAL +ELECTRICAL ENGINEERING CO., LTD. Free format text: CORRECT: INVENTOR; FROM: WU ZHONGWEI FANG XINLING LIU SHENG GAO HONG LIU YUANKUN HUANG JIQING LIANGLI PAN ZHIYONG ZHANG JING LV PANKE ZHAO YAO WANG RUILING FU LIQIANG BAI HAIYAN ZUO XIANGCHUN TO: WU ZHONGWEI FANG XINLING LIU YUANKUN AI QINGSONG XU DONGMEI FU LIQIANG GAO PEI |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |