CN111019249A - 橡胶及制备工艺 - Google Patents
橡胶及制备工艺 Download PDFInfo
- Publication number
- CN111019249A CN111019249A CN201911194549.8A CN201911194549A CN111019249A CN 111019249 A CN111019249 A CN 111019249A CN 201911194549 A CN201911194549 A CN 201911194549A CN 111019249 A CN111019249 A CN 111019249A
- Authority
- CN
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- Prior art keywords
- rubber
- weight
- parts
- mixing
- attapulgite
- Prior art date
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- Granted
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 82
- 239000005060 rubber Substances 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 47
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 18
- 239000000654 additive Substances 0.000 claims abstract description 16
- 230000000996 additive effect Effects 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000007822 coupling agent Substances 0.000 claims abstract description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 239000003208 petroleum Substances 0.000 claims abstract description 8
- 239000004014 plasticizer Substances 0.000 claims abstract description 8
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 7
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 6
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000012188 paraffin wax Substances 0.000 claims abstract description 5
- 239000008117 stearic acid Substances 0.000 claims abstract description 5
- 239000011787 zinc oxide Substances 0.000 claims abstract description 5
- 229960000892 attapulgite Drugs 0.000 claims description 64
- 229910052625 palygorskite Inorganic materials 0.000 claims description 64
- 239000011325 microbead Substances 0.000 claims description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000002244 precipitate Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 16
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 15
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 14
- 238000007873 sieving Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000006229 carbon black Substances 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 239000003607 modifier Substances 0.000 claims description 12
- 230000007935 neutral effect Effects 0.000 claims description 12
- 229910001887 tin oxide Inorganic materials 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 10
- 238000004073 vulcanization Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid Chemical compound CCCCCCC(O)=O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 claims description 8
- 238000007127 saponification reaction Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 6
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 6
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 claims description 5
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 3
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims 2
- 239000000758 substrate Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 description 15
- 239000011159 matrix material Substances 0.000 description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 238000009210 therapy by ultrasound Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000004005 microsphere Substances 0.000 description 3
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical group [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical group CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 208000027418 Wounds and injury Diseases 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
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002733 tin-carbon composite material Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/04—Plastics, rubber or vulcanised fibre
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2231—Oxides; Hydroxides of metals of tin
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
组别 | 干式摩擦系数 | 湿式摩擦系数 |
实施例1 | 1.72 | 0.81 |
实施例6 | 1.43 | 0.61 |
实施例7 | 1.24 | 0.54 |
对比例3 | 0.91 | 0.32 |
组别 | 拉伸强度/MPa | 拉断伸长率/% | 直角形撕裂强度/kN/m |
实施例1 | 28.7 | 594 | 76.9 |
实施例2 | 24.5 | 461 | 64.5 |
实施例3 | 23.1 | 454 | 62.1 |
实施例4 | 16.4 | 387 | 57.6 |
实施例5 | 27.9 | 515 | 72.5 |
实施例6 | 28.1 | 584 | 74.8 |
实施例7 | 27.8 | 564 | 75.4 |
对比例1 | 26.1 | 502 | 71.9 |
对比例2 | 28.3 | 578 | 73.1 |
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911194549.8A CN111019249B (zh) | 2019-11-28 | 2019-11-28 | 橡胶及制备工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911194549.8A CN111019249B (zh) | 2019-11-28 | 2019-11-28 | 橡胶及制备工艺 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111019249A true CN111019249A (zh) | 2020-04-17 |
CN111019249B CN111019249B (zh) | 2022-03-29 |
Family
ID=70207124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911194549.8A Active CN111019249B (zh) | 2019-11-28 | 2019-11-28 | 橡胶及制备工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111019249B (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112436131A (zh) * | 2020-12-09 | 2021-03-02 | 西北师范大学 | 一种熔融盐辅助镁热还原制备硅碳复合材料的方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105461975A (zh) * | 2014-08-08 | 2016-04-06 | 兰州大学 | 一种天然橡胶/凹凸棒石纳米复合材料的制备方法 |
CN105524297A (zh) * | 2014-09-28 | 2016-04-27 | 兰州大学 | 一种橡胶补强用凹凸棒石/水滑石复合填料的制备方法 |
KR20160140078A (ko) * | 2015-05-29 | 2016-12-07 | 한폴 주식회사 | 부틸고무 조성물 및 이를 이용한 방수 및 방식시트, 방수 및 방식시트를 이용한 강관 부식방지공법 |
CN106905625A (zh) * | 2017-03-01 | 2017-06-30 | 成都鑫丰业鞋业有限公司 | 一种防滑鞋底及其制作方法 |
-
2019
- 2019-11-28 CN CN201911194549.8A patent/CN111019249B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105461975A (zh) * | 2014-08-08 | 2016-04-06 | 兰州大学 | 一种天然橡胶/凹凸棒石纳米复合材料的制备方法 |
CN105524297A (zh) * | 2014-09-28 | 2016-04-27 | 兰州大学 | 一种橡胶补强用凹凸棒石/水滑石复合填料的制备方法 |
KR20160140078A (ko) * | 2015-05-29 | 2016-12-07 | 한폴 주식회사 | 부틸고무 조성물 및 이를 이용한 방수 및 방식시트, 방수 및 방식시트를 이용한 강관 부식방지공법 |
CN106905625A (zh) * | 2017-03-01 | 2017-06-30 | 成都鑫丰业鞋业有限公司 | 一种防滑鞋底及其制作方法 |
Non-Patent Citations (1)
Title |
---|
张兆红 等: "凹凸棒土补强填充橡胶的应用研究进展", 《硅酸盐通报》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112436131A (zh) * | 2020-12-09 | 2021-03-02 | 西北师范大学 | 一种熔融盐辅助镁热还原制备硅碳复合材料的方法 |
CN112436131B (zh) * | 2020-12-09 | 2023-01-06 | 西北师范大学 | 一种熔融盐辅助镁热还原制备硅碳复合材料的方法 |
Also Published As
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CN111019249B (zh) | 2022-03-29 |
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Effective date of registration: 20220307 Address after: No.107, beiwuguo village, Liansheng village, Nanyuan street, Yuhang District, Hangzhou City, Zhejiang Province, 310000 Applicant after: Hangzhou ideal sealing technology Co.,Ltd. Address before: 435116 No. 2051, kechongbai Bay, Chaoyang village, Jinshandian Town, Daye City, Huangshi City, Hubei Province Applicant before: Ke Xiang |
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Denomination of invention: Rubber and preparation process Effective date of registration: 20231109 Granted publication date: 20220329 Pledgee: Zhejiang Hangzhou Yuhang Rural Commercial Bank Co.,Ltd. Qiantang Sub branch Pledgor: Hangzhou ideal sealing technology Co.,Ltd. Registration number: Y2023980064682 |
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