CN107814987A - One kind is paddled environment-friendly antirust nitrile rubber - Google Patents
One kind is paddled environment-friendly antirust nitrile rubber Download PDFInfo
- Publication number
- CN107814987A CN107814987A CN201711103458.XA CN201711103458A CN107814987A CN 107814987 A CN107814987 A CN 107814987A CN 201711103458 A CN201711103458 A CN 201711103458A CN 107814987 A CN107814987 A CN 107814987A
- Authority
- CN
- China
- Prior art keywords
- antirust
- environment
- carbon black
- paddled
- nitrile rubber
- 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.)
- Pending
Links
- 229920000459 Nitrile rubber Polymers 0.000 title claims abstract description 23
- 239000006229 carbon black Substances 0.000 claims abstract description 33
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 4
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000005864 Sulphur Substances 0.000 claims abstract description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012188 paraffin wax Substances 0.000 claims abstract description 4
- 239000004014 plasticizer Substances 0.000 claims abstract description 4
- 229940088417 precipitated calcium carbonate Drugs 0.000 claims abstract description 4
- 239000008117 stearic acid Substances 0.000 claims abstract description 4
- 239000011787 zinc oxide Substances 0.000 claims abstract description 4
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims abstract description 3
- 235000019241 carbon black Nutrition 0.000 claims description 32
- 239000013556 antirust agent Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 9
- 230000000640 hydroxylating effect Effects 0.000 claims description 9
- -1 alcohol amine salt Chemical class 0.000 claims description 7
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- 230000021523 carboxylation Effects 0.000 claims description 6
- 238000006473 carboxylation reaction Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- DYUQAZSOFZSPHD-UHFFFAOYSA-N Phenylpropyl alcohol Natural products CCC(O)C1=CC=CC=C1 DYUQAZSOFZSPHD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 150000003852 triazoles Chemical class 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 3
- 230000001476 alcoholic effect Effects 0.000 claims description 3
- 150000001721 carbon Chemical class 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- 239000012429 reaction media Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- AVVWPBAENSWJCB-IVMDWMLBSA-N D-glucofuranose Chemical compound OC[C@@H](O)[C@H]1OC(O)[C@H](O)[C@H]1O AVVWPBAENSWJCB-IVMDWMLBSA-N 0.000 description 1
- DFPAKSUCGFBDDF-UHFFFAOYSA-N Nicotinamide Chemical compound NC(=O)C1=CC=CN=C1 DFPAKSUCGFBDDF-UHFFFAOYSA-N 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
- 239000004299 sodium benzoate Substances 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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Paddled environment-friendly antirust nitrile rubber the invention discloses one kind, include each component of following parts by weight：NBR 100 150, antirust carbon black 80 100, environment-friendly plasticizer TP 95 15 30, precipitated calcium carbonate 20 35, paraffin 12, zinc oxide 56, stearic acid 1.5 2.8, sulphur S 1.5 1.8, antioxidant 264 12, accelerator CBS 1.5 2.2, accelerator TT 1.5 2.
Description
Technical field
The present invention relates to field of nitrile rubber technology of paddling, more particularly to one kind is paddled environment-friendly antirust nitrile rubber.
Background technology
Nitrile rubber is that abbreviation NBR, nitrile rubber mainly uses as made from butadiene and acrylonitrile through emulsion polymerization
Emulsion polymerization at low temperature produces, and oil resistivity is fabulous, and wearability is higher, and heat resistance is preferable, and bonding force is strong, is often used as the soft of pipeline
Property sealing joint, easy for construction, the collection of sewage, conveying are safer.In equipment of paddling, rubber is frequently necessary to and gold
Metal conduit be used together be directly coupled in metal pipe mouth metallic element being embedded in rubber as gasket seal, rubber tube it is first-class
Deng.For General Purpose Rubber product when contacting or combining together with metallic article, rubber does not have corrosion protection effect to metal, is paddling
By the joint effect of the factors such as time, microorganism, pollutant in environment, metal material inevitably easy corrosion, and rubber
Among additive or auxiliary agent also have certain corrosivity to metal.These situations cause the joint of metalwork and rubber to occur
Corrosion, sealing property is influenceed, often scrap, change because of corrosion, cause certain economic loss, while can also contaminant water
Resource.
Chinese patent 201110419962.7 discloses a kind of Rustproof rubber and preparation method thereof, mainly by rubber body
Antirust agent is added in system and reaches rust-proof effect, but the antirust agent used is mainly vapour phase inhibitor, is easily analysed in water environment
Go out, in the equipment that is not suitable for paddling, and the material such as natrium nitrosum, sodium benzoate is also a kind of pollutant in itself, not environmentally friendly enough.
The content of the invention
The defects of present invention is in order to make up prior art, there is provided one kind is paddled environment-friendly antirust nitrile rubber.
The present invention is achieved by the following technical solutions：
One kind is paddled environment-friendly antirust nitrile rubber, includes each component of following parts by weight：NBR 100-150, prevent
Become rusty carbon black 80-100, environment-friendly plasticizer TP-95 15-30, precipitated calcium carbonate 20-35, paraffin 1-2, zinc oxide 5-6, stearic acid
1.5-2.8, sulphur S 1.5-1.8, antioxidant 264 1-2, accelerator CBS 1.5-2.2, accelerator TT 1.5-2.
Described one kind is paddled environment-friendly antirust nitrile rubber, and described antirust carbon black is with containing by hydroxylating carbon black
The environmentally-frieantirust antirust agent of carboxyl is according to 1:The weight of (0.001-0.01) obtains than reaction.
Described hydroxylating carbon black is that carbon black is handled into 5-10h through strong acid carboxylation, and then the carbon blacksurface after carboxylation connects
Branch silane coupler, then will be hydrolyzed in the carbon black input alcoholic solution of grafted silane coupling agent, that is, obtain hydroxylated carbon black.
One or more in the preferred N550 carbon blacks of described carbon black, N770 carbon blacks.
The described environmentally-frieantirust antirust agent containing carboxyl be organic carboxyl acid alcohol amine salt, carboxyl phenylpropyl alcohol triazole, 3- benzoyls-
α-D- glucofuranoses, 3- benzyl-alpha-D- glucofuranoses, 3- acetyl group-α-D- glucofuranoses, 3- dodecanoyl-α-D-
One kind in glucofuranose, Dicarboxy oleic acid acidamide.
Described hydroxylating carbon black reacts actual conditions with the environmentally-frieantirust antirust agent containing carboxyl：Made with tetrahydrofuran or water
For reaction medium, the stirring reaction 2-5h under the conditions of 50-80 DEG C, reaction terminates rear resulting material and washed 3-5 times, after heated-air drying
Sieving.
The present invention by the way that antirust agent is incorporated into nitrile rubber system by antirust agent with the method that carbon black coats, selection
Antirust agent is the environmentally-frieantirust antirust agent of carboxylated, water-soluble or oil-soluble antirust agent, is directly added than traditional antirust agent
The advantages of add mode, is：Using the carboxyl reaction in the hydroxyl and antirust agent of carbon blacksurface after modification, by carbon black with preventing
The strong bonded of rust agent, improves the compatibility of antirust agent and elastomeric material, obtains more long-acting rust-proof effect, effectively
The precipitation of antirust agent is inhibited, elastomeric material is had no adverse effects in itself, effectively inhibits the corrosion of junction metal material,
The service life of metal material is extended, reduces the maintenance cost of metallic article, ensure that the performance for equipment of paddling.
Embodiment
One kind is paddled environment-friendly antirust nitrile rubber, includes each component of following parts by weight：NBR 100, antirust charcoal
Black 80, environment-friendly plasticizer TP-95 20, precipitated calcium carbonate 20, paraffin 1, zinc oxide 5, stearic acid 1.5, sulphur S 1.5, age resistor
264 1, accelerator CBS 1.5, accelerator TT 1.5.
Wherein antirust carbon black is according to 1 by hydroxylating carbon black and carboxyl phenylpropyl alcohol triazole:0.001 weight obtains than reaction
's.
Described hydroxylating carbon black is that carbon black is handled into 5h through strong acid carboxylation, then the carbon blacksurface grafting silicon after carboxylation
Alkane coupling agent, then will be hydrolyzed in the carbon black input alcoholic solution of grafted silane coupling agent, that is, obtain hydroxylated carbon black, wherein carbon black
It is N550 carbon blacks and N770 carbon blacks according to 1:1.5 weight ratio is formulated.
Described hydroxylating carbon black reacts actual conditions with carboxyl phenylpropyl alcohol triazole：It is situated between using tetrahydrofuran as reaction
Matter, the stirring reaction 2h under the conditions of 50 DEG C, reaction terminate rear resulting material and washed 3 times, sieved after heated-air drying.
Obtained material is subjected to properties test by corresponding national standard, experimental data is shown in Table 1：
Table 1
Claims (6)
- The environment-friendly antirust nitrile rubber 1. one kind is paddled, it is characterised in that include each component of following parts by weight：NBR 100-150, antirust carbon black 80-100, environment-friendly plasticizer TP-95 15-30, precipitated calcium carbonate 20-35, paraffin 1-2, zinc oxide 5- 6th, stearic acid 1.5-2.8, sulphur S 1.5-1.8, antioxidant 264 1-2, accelerator CBS 1.5-2.2, accelerator TT 1.5-2.
- The environment-friendly antirust nitrile rubber 2. one kind as claimed in claim 1 is paddled, it is characterised in that described antirust carbon black It is according to 1 by hydroxylating carbon black and the environmentally-frieantirust antirust agent containing carboxyl:（0.001-0.01）Weight obtained than reaction.
- The environment-friendly antirust nitrile rubber 3. one kind as claimed in claim 2 is paddled, it is characterised in that described hydroxylating charcoal Black is that carbon black is handled into 5-10h, then the carbon blacksurface grafted silane coupling agent after carboxylation, then will be grafted silicon through strong acid carboxylation Hydrolyzed in the carbon black input alcoholic solution of alkane coupling agent, that is, obtain hydroxylated carbon black.
- The environment-friendly antirust nitrile rubber 4. one kind as claimed in claim 3 is paddled, it is characterised in that described carbon black is preferred One or more in N550 carbon blacks, N770 carbon blacks.
- The environment-friendly antirust nitrile rubber 5. one kind as claimed in claim 2 is paddled, it is characterised in that described contains carboxyl Environmentally-frieantirust antirust agent for organic carboxyl acid alcohol amine salt, carboxyl phenylpropyl alcohol triazole, 3- benzoyl-α-D- glucofuranoses, 3- benzyls- α-D- glucofuranoses, 3- acetyl group-α-D- glucofuranoses, 3- dodecanoyl-α-D- glucofuranoses, Dicarboxy oleic acid acyl One kind in amine.
- The environment-friendly antirust nitrile rubber 6. one kind as claimed in claim 2 is paddled, it is characterised in that described hydroxylating charcoal It is black to be with the environmentally-frieantirust antirust agent reaction actual conditions containing carboxyl：Using tetrahydrofuran or water as reaction medium, in 50-80 DEG C of bar Stirring reaction 2-5h under part, reaction terminate rear resulting material and washed 3-5 times, sieved after heated-air drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711103458.XA CN107814987A (en) | 2017-11-10 | 2017-11-10 | One kind is paddled environment-friendly antirust nitrile rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711103458.XA CN107814987A (en) | 2017-11-10 | 2017-11-10 | One kind is paddled environment-friendly antirust nitrile rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107814987A true CN107814987A (en) | 2018-03-20 |
Family
ID=61608757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711103458.XA Pending CN107814987A (en) | 2017-11-10 | 2017-11-10 | One kind is paddled environment-friendly antirust nitrile rubber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107814987A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679166A (en) * | 2018-12-29 | 2019-04-26 | 苏州恒则成精密橡塑有限公司 | A kind of environmental protection nitrile rubber |
| CN109679167A (en) * | 2018-12-29 | 2019-04-26 | 苏州恒则成精密橡塑有限公司 | A kind of nitrile rubber of environmental protection |
| CN116288363A (en) * | 2023-03-17 | 2023-06-23 | 安徽中天石化股份有限公司 | Long-acting water-based antirust agent and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274006A (en) * | 1991-02-19 | 1993-12-28 | Nippon Zeon Co., Ltd. | Foamable epoxy resin composition |
| CN103087371A (en) * | 2013-02-06 | 2013-05-08 | 福建省鑫橡龙橡塑制品有限公司 | Oil-resistant rubber tube for automobile |
-
2017
- 2017-11-10 CN CN201711103458.XA patent/CN107814987A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274006A (en) * | 1991-02-19 | 1993-12-28 | Nippon Zeon Co., Ltd. | Foamable epoxy resin composition |
| CN103087371A (en) * | 2013-02-06 | 2013-05-08 | 福建省鑫橡龙橡塑制品有限公司 | Oil-resistant rubber tube for automobile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679166A (en) * | 2018-12-29 | 2019-04-26 | 苏州恒则成精密橡塑有限公司 | A kind of environmental protection nitrile rubber |
| CN109679167A (en) * | 2018-12-29 | 2019-04-26 | 苏州恒则成精密橡塑有限公司 | A kind of nitrile rubber of environmental protection |
| CN116288363A (en) * | 2023-03-17 | 2023-06-23 | 安徽中天石化股份有限公司 | Long-acting water-based antirust agent and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107814987A (en) | One kind is paddled environment-friendly antirust nitrile rubber | |
| CN101993679A (en) | Sealant | |
| CN105062300A (en) | Anti-corrosion and wear-resisting coating for throwing disc of pneumatic type feeder and preparation method of coating | |
| CN202188246U (en) | Metal-plastic transition connecting structure | |
| CN204879126U (en) | Air -fuel mixture that stainless steel connects oil pipe assembly for fuel | |
| CN114593280B (en) | Cabin pipeline using super heat insulation material and preparation method thereof | |
| CN204062246U (en) | One can increase the corrosion proof clip connected part of multiple tube | |
| CN103044831B (en) | A kind of synchronous gear box lid gasket sizing material and preparation method thereof | |
| CN200968466Y (en) | Totally-enclosed direct-burried corrugated pipe expansion-joint | |
| JPH01190739A (en) | Fluororubber composition and production of crosslinked fluororubber product | |
| CN101724214A (en) | Antistatic polytetrafluoroethylene piping component | |
| CN107057513A (en) | A kind of surface antirust paint for metal bellows | |
| CN104263438B (en) | A kind of methanol gasoline rubber swelling inhibitor | |
| CN117777873B (en) | Polyethylene composite belt for corrosion prevention of bent pipe and production process thereof | |
| CN202612912U (en) | Pipeline connecting device | |
| CN111171405A (en) | All-weather large-diameter rubber hose | |
| CN219734592U (en) | Stainless steel elbow with good sealing effect | |
| JPS62240338A (en) | Rubber composition having improved heat-resistance | |
| CN104672554A (en) | Acid- and alkali-resistant rubber conveyer belt | |
| CN104693520A (en) | Tear-resistant sealing ring rubber material | |
| RU2639172C1 (en) | Corrosion resistant steel | |
| RU2635642C1 (en) | Corrosion resistant steel | |
| CN202914913U (en) | Socket welding type dual-link connector | |
| CN220668722U (en) | Pipeline piece with good interference resistance | |
| CN202927311U (en) | Clamping hoop |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180320 |