CN105647349A - 一种高温耐磨改性环氧树脂涂料及其制备方法 - Google Patents
一种高温耐磨改性环氧树脂涂料及其制备方法 Download PDFInfo
- Publication number
- CN105647349A CN105647349A CN201610225194.4A CN201610225194A CN105647349A CN 105647349 A CN105647349 A CN 105647349A CN 201610225194 A CN201610225194 A CN 201610225194A CN 105647349 A CN105647349 A CN 105647349A
- Authority
- CN
- China
- Prior art keywords
- parts
- epoxy resin
- modified epoxy
- resin paint
- polyimides
- 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
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 69
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 69
- 239000003973 paint Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000004642 Polyimide Substances 0.000 claims abstract description 31
- 229920001721 polyimide Polymers 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000002562 thickening agent Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007822 coupling agent Substances 0.000 claims abstract description 21
- 239000008367 deionised water Substances 0.000 claims abstract description 21
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 21
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 19
- 239000010936 titanium Substances 0.000 claims abstract description 19
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 21
- 229910052750 molybdenum Inorganic materials 0.000 claims description 21
- 239000011733 molybdenum Substances 0.000 claims description 21
- 239000004593 Epoxy Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 16
- -1 methylsiloxane Chemical class 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 4
- 229920002292 Nylon 6 Polymers 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 2
- CVQVSVBUMVSJES-UHFFFAOYSA-N dimethoxy-methyl-phenylsilane Chemical compound CO[Si](C)(OC)C1=CC=CC=C1 CVQVSVBUMVSJES-UHFFFAOYSA-N 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 229920002480 polybenzimidazole Polymers 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229940080314 sodium bentonite Drugs 0.000 claims description 2
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 3
- 239000003245 coal Substances 0.000 abstract 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 8
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 230000035939 shock Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 229910021418 black silicon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610225194.4A CN105647349B (zh) | 2016-04-12 | 2016-04-12 | 一种高温耐磨改性环氧树脂涂料及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610225194.4A CN105647349B (zh) | 2016-04-12 | 2016-04-12 | 一种高温耐磨改性环氧树脂涂料及其制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN105647349A true CN105647349A (zh) | 2016-06-08 |
CN105647349B CN105647349B (zh) | 2018-08-10 |
Family
ID=56497242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610225194.4A Active CN105647349B (zh) | 2016-04-12 | 2016-04-12 | 一种高温耐磨改性环氧树脂涂料及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105647349B (zh) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106118360A (zh) * | 2016-06-30 | 2016-11-16 | 太仓市金新涂料有限公司 | 一种环保耐磨防腐涂料及其制备方法 |
CN106589315A (zh) * | 2016-12-13 | 2017-04-26 | 广东石油化工学院 | 一种改性耐高温环氧树脂的制备方法 |
CN107974168A (zh) * | 2017-12-08 | 2018-05-01 | 枞阳县新天地高新材料有限公司 | 一种耐磨环氧树脂涂料 |
CN109054545A (zh) * | 2018-06-06 | 2018-12-21 | 河北地质大学 | 一种基于煤矸石和粉煤灰的绿色环保建筑材料 |
CN110484099A (zh) * | 2019-08-20 | 2019-11-22 | 广东恒宝缘新材料有限公司 | 一种改性超耐磨涂料 |
CN110628302A (zh) * | 2019-09-16 | 2019-12-31 | 罗洪财 | 一种基于改性环氧树脂的双组份涂料及其制备方法 |
CN111117429A (zh) * | 2019-12-31 | 2020-05-08 | 无锡爱尔拓燃气技术设备有限公司 | 一种lng气化调压计量撬 |
CN113527632A (zh) * | 2021-07-20 | 2021-10-22 | 湖南聚仁化工新材料科技有限公司 | 一种ε-己内酯改性环氧树脂的制备方法及应用 |
CN114213935A (zh) * | 2021-12-22 | 2022-03-22 | 广东美涂士建材股份有限公司 | 一种耐高温耐磨合金高性能工业涂料及其制备方法 |
CN114350045A (zh) * | 2021-04-13 | 2022-04-15 | 杭州安誉科技有限公司 | 用于荧光定量pcr仪的耐高温热盖及其成型方法 |
CN117025097A (zh) * | 2023-08-10 | 2023-11-10 | 南京玖泰新材料科技有限公司 | 用于新型环氧地坪卷材的涂料树脂 |
CN118126602A (zh) * | 2024-05-08 | 2024-06-04 | 广东东方一哥新材料股份有限公司 | 一种耐磨环氧树脂涂料及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101514273A (zh) * | 2008-02-22 | 2009-08-26 | 鲁毅 | 一种环氧树脂涂料及其制备方法 |
CN102443339A (zh) * | 2010-10-13 | 2012-05-09 | 中国科学院金属研究所 | 超高硬度有机防护涂料及其制备方法 |
CN103881105A (zh) * | 2014-01-22 | 2014-06-25 | 杭州吉华高分子材料有限公司 | 一种改性环氧树脂的制备方法与应用 |
CN104004435A (zh) * | 2014-05-27 | 2014-08-27 | 江苏欣安新材料技术有限公司 | 一种800度高温下的高温耐磨涂料及其制备方法 |
CN104017284A (zh) * | 2014-06-13 | 2014-09-03 | 大连海事大学 | 一种氯磺化聚乙烯橡胶组合物、及其制备的水润滑橡胶轴承衬套 |
-
2016
- 2016-04-12 CN CN201610225194.4A patent/CN105647349B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101514273A (zh) * | 2008-02-22 | 2009-08-26 | 鲁毅 | 一种环氧树脂涂料及其制备方法 |
CN102443339A (zh) * | 2010-10-13 | 2012-05-09 | 中国科学院金属研究所 | 超高硬度有机防护涂料及其制备方法 |
CN103881105A (zh) * | 2014-01-22 | 2014-06-25 | 杭州吉华高分子材料有限公司 | 一种改性环氧树脂的制备方法与应用 |
CN104004435A (zh) * | 2014-05-27 | 2014-08-27 | 江苏欣安新材料技术有限公司 | 一种800度高温下的高温耐磨涂料及其制备方法 |
CN104017284A (zh) * | 2014-06-13 | 2014-09-03 | 大连海事大学 | 一种氯磺化聚乙烯橡胶组合物、及其制备的水润滑橡胶轴承衬套 |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106118360A (zh) * | 2016-06-30 | 2016-11-16 | 太仓市金新涂料有限公司 | 一种环保耐磨防腐涂料及其制备方法 |
CN106589315A (zh) * | 2016-12-13 | 2017-04-26 | 广东石油化工学院 | 一种改性耐高温环氧树脂的制备方法 |
CN107974168A (zh) * | 2017-12-08 | 2018-05-01 | 枞阳县新天地高新材料有限公司 | 一种耐磨环氧树脂涂料 |
CN109054545A (zh) * | 2018-06-06 | 2018-12-21 | 河北地质大学 | 一种基于煤矸石和粉煤灰的绿色环保建筑材料 |
CN110484099A (zh) * | 2019-08-20 | 2019-11-22 | 广东恒宝缘新材料有限公司 | 一种改性超耐磨涂料 |
CN110628302A (zh) * | 2019-09-16 | 2019-12-31 | 罗洪财 | 一种基于改性环氧树脂的双组份涂料及其制备方法 |
CN111117429A (zh) * | 2019-12-31 | 2020-05-08 | 无锡爱尔拓燃气技术设备有限公司 | 一种lng气化调压计量撬 |
CN114350045A (zh) * | 2021-04-13 | 2022-04-15 | 杭州安誉科技有限公司 | 用于荧光定量pcr仪的耐高温热盖及其成型方法 |
CN114350045B (zh) * | 2021-04-13 | 2022-08-30 | 杭州安誉科技有限公司 | 用于荧光定量pcr仪的耐高温热盖及其成型方法 |
CN113527632A (zh) * | 2021-07-20 | 2021-10-22 | 湖南聚仁化工新材料科技有限公司 | 一种ε-己内酯改性环氧树脂的制备方法及应用 |
CN114213935A (zh) * | 2021-12-22 | 2022-03-22 | 广东美涂士建材股份有限公司 | 一种耐高温耐磨合金高性能工业涂料及其制备方法 |
CN117025097A (zh) * | 2023-08-10 | 2023-11-10 | 南京玖泰新材料科技有限公司 | 用于新型环氧地坪卷材的涂料树脂 |
CN118126602A (zh) * | 2024-05-08 | 2024-06-04 | 广东东方一哥新材料股份有限公司 | 一种耐磨环氧树脂涂料及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
CN105647349B (zh) | 2018-08-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105647349A (zh) | 一种高温耐磨改性环氧树脂涂料及其制备方法 | |
CN102127328B (zh) | 水性带锈无机富锌涂料及其制备方法 | |
CN105086528B (zh) | 一种粘结型固体润滑涂料及其制备方法 | |
CN110591501B (zh) | 含超支化聚硅氧烷环氧粘结型固体润滑材料及制备方法和涂层方法 | |
CN102134444A (zh) | 一种耐温隔热重防腐涂料 | |
CN109268393B (zh) | 一种高承载自润滑轴套及其制备方法 | |
CN109181477A (zh) | 原油集输管线内壁挤涂无溶剂环氧重防腐涂料及其制备方法 | |
JP2007517165A (ja) | 軸受 | |
EP2451987A1 (de) | Spritzwerkstoff auf eisenbasis und verfahren zur herstellung eines spritzwerkstoffs, sowie thermische spritzschicht und spritzverfahren | |
US20160208431A1 (en) | Fluorine-containing self-lubricating fabric coating material and method for preparing the same | |
CN102993901A (zh) | 环氧富锌重防腐涂料的制备方法 | |
CN113861805A (zh) | 高温耐磨重防腐粉末涂料及其制备方法和涂装方法 | |
CN108219628B (zh) | 一种耐海洋腐蚀的航空发动机去离子水漆及其制备方法 | |
CN110845879A (zh) | 一种新型环保的水性涂料及其制备方法 | |
CN1450139A (zh) | 一种耐高温触变型聚酰亚胺基防腐润滑涂料 | |
CN111057438B (zh) | 一种石墨烯基耐高温防腐涂料及其制备方法 | |
CN111117324A (zh) | 一种具有长效润滑防腐功能的铝粉着色涂料及其制备方法 | |
CN110591500A (zh) | 含超支化聚硅氧烷减摩抗磨阻燃型环氧粘结固体润滑材料及制备和使用方法 | |
CN114031993A (zh) | 一种汽车发动机舱防火防爆水性环保涂料 | |
CN108384442A (zh) | 一种用于氧化铝生产中溶出设备的防腐阻垢涂层及其制备方法 | |
CN109054625B (zh) | 一种气浮轴承用复合聚酰亚胺薄膜及其制备方法 | |
CN111925674A (zh) | 一种防腐自润滑紧固件及其制备工艺 | |
CN111087880A (zh) | 一种耐磨防刮擦涂层及其制备方法 | |
CN112266701B (zh) | 一种heme高性能环氧改性弹性复合防腐防水涂料及制备方法 | |
CN107903077B (zh) | 一种高强度陶瓷材料 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
TA01 | Transfer of patent application right | ||
TA01 | Transfer of patent application right |
Effective date of registration: 20180620 Address after: No. 1, Chengyang street, Xushui District, Baoding, Hebei Applicant after: Hebei Chenyang IndustrialL&trade Group Co., Ltd. Address before: 313014 Huzhou City, Zhejiang Huzhou Nanxun Huzhou District Xin Ke Chemical Co., Ltd. Applicant before: HUZHOU XINAOKE CHEMICAL CO., LTD. |
|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20191206 Address after: No. 502, unit 4, Chenyang residential building, No. 12, Yongxing West Road, ansu Town, Xushui County, Baoding City, Hebei Province 072550 Patentee after: Liu Tong Address before: 072550 Hebei city of Baoding province Xushui Chenyang Street No. 1 Patentee before: Hebei Chenyang IndustrialL&trade Group Co., Ltd. |
|
PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: High-temperature wear-resistant modified epoxy resin paint and preparation method thereof Effective date of registration: 20191230 Granted publication date: 20180810 Pledgee: Rural credit cooperative association of Xushui District, Baoding City Pledgor: Liu Tong Registration number: Y2019980001387 |