CN104213126A - Metal surface rust inhibitor and preparation method thereof - Google Patents
Metal surface rust inhibitor and preparation method thereof Download PDFInfo
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- CN104213126A CN104213126A CN201410499002.XA CN201410499002A CN104213126A CN 104213126 A CN104213126 A CN 104213126A CN 201410499002 A CN201410499002 A CN 201410499002A CN 104213126 A CN104213126 A CN 104213126A
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Abstract
The invention discloses a metal surface rust inhibitor and a preparation method thereof. The metal surface rust inhibitor comprises dodecenylsuccinic acid, benzotriazole, zinc naphthenate, N-ethyl-N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, inositol hexaphosphate, aluminium powder, barium sulfate, hydroxy propyl methyl cellulose, dimethylaminoethyl acrylate, sodium allysulfonate and water. The preparation method comprises the following steps: adding dodecenylsuccinic acid, benzotriazole and zinc naphthenate into water, stirring the mixture I uniformly, adding N-ethyl-N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, inositol hexaphosphate, aluminium powder, barium sulfate into the mixture I, adding hydroxy propyl methyl cellulose, dimethylaminoethyl acrylate and sodium allysulfonate into the mixture II, and adding rest components into the mixture III to obtain the rust inhibitor. The rust inhibitor provided by the invention can increase the corrosion resistance of a metal surface and improve the moist isolating property and the air isolating property of a protective layer.
Description
Technical field
The invention belongs to field of metal surface treatment technology, be specifically related to a kind of rust preventive for metal surface and preparation method thereof.
Background technology
The corrosion of metal is the problem often run in producing, metal rusting not only makes metal works itself be damaged in profile, color and luster and mechanical property etc., and make the Quality Down of product, especially severe also can make product rejection, China GDP in 2011 is 7.43 trillion dollars, and the financial loss caused because of corrosion is up to 2200 ~ 3,700 hundred million dollars, accounts for 3% ~ 5% of national GDP total value.In order to slow down the corrosion of iron and steel, loss corrosion caused drops to bottom line, and people take a lot of rust protection measure, wherein the use of rust protection liquid be then apply comparatively wide, effect is significantly a kind of.
Rust protection liquid is a kind of synthesis permeate agent of super grade high efficiency, and it can form thin film in metallic surface, prevents corrosion of metal.According to the difference of component, rust protection liquid is divided into oil base rust protection liquid and aqueous protective fluids.
Oil base rust protection liquid is made up of base oil, oil-soluble inhibitor and supplementary additive etc.Oil base rust protection liquid can form the fine and close oil film of one deck in metallic surface, the water in air-isolation, oxygen etc. play rust inhibition.But oil base rust protection liquid subsequent handling need carry out oil removing, the removal difficulty of slushing oil is quite large, and along with the continuous enhancing of petroleum resources growing tension and environmental consciousness, and add the existence of the oil not easily problem such as decomposition, oil base rust protection liquid is replaced gradually.
Aqueous protective fluids is made up of water soluble anti-rust agent, water-soluble additive, inhibiter and water etc.Aqueous protective fluids adds a certain amount of rust-preventive agent in aqueous, to stop the generation of chemistry or electrochemical action, generates insoluble passivation film or react rete and play rust inhibition.But after this kind of rust protection liquid is applied to metallic surface, liquid film easily trickles, after moisture evaporation, also can form one deck bloom in metallic surface, lose due rust-proof effect, rustless property does not reach the effect of slushing oil.Further, traditional aqueous protective fluids is many containing the composition such as nitrite, dichromate, as everyone knows, nitrites is carcinogenic substance, has harm to the health of operator, and simultaneously dichromate composition is because of containing heavy metals such as chromium, to bad environmental, also have impact on performance and the quality of metal.
In existing technology, to dispelling and antirust process of metallic substance and surface of metal product rusty scale, traditional method adopts manual wiping or adds heat soaking with strong acid or strong base solution, scrub, take a lot of work, time-consuming, both increase labour intensity, cause environmental pollution again, and poor processing effect.And adopt chemical treatment to carry out degreasing and rust removal; layer protecting film can be there is in metallic surface; although this layer of protective membrane can play certain antirust corrosion inhibition to metal in a short time, generally remain to 3 ~ 5 days, new corrosion is formed gradually and develops under protective film.Therefore, it is slow to there is rust cleaning speed in prior art, and the defects such as antirust time is short, and working temperature is high, tank liquor unstable properties and rust cleaning are difficult to thoroughly and the problem such as still to get rusty easily after rust cleaning.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and a kind of rust preventive for metal surface and preparation method thereof is provided; this rust-preventive agent can improve the erosion resistance of metallic surface; improve the performance of protective layer damp proof insulation and isolated air; make it have the rust-proof effect of reliable long period, for metallic substance and metal products provide splendid corrosion protection function.
A kind of rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 1 ~ 6 part, benzotriazole 1 ~ 8 part, zinc naphthenate 3 ~ 10 parts, N-ethyl, N-phenyl zinc dithiocarbamate 2 ~ 8 parts, sodium oleate 1 ~ 7 part, ethylene glycol 3 ~ 11 parts, myo-Inositol hexaphosphate 4 ~ 10 parts, aluminium powder 5 ~ 12 parts, 3 ~ 9 parts, barium sulfate, Vltra tears 2 ~ 8 parts, dimethylamino ethyl acrylate 2 ~ 9 parts, sodium allyl sulfonate 3 ~ 10 parts, 10 ~ 18 parts, water.
As the further improvement of foregoing invention, described rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 2 ~ 5 parts, benzotriazole 3 ~ 6 parts, zinc naphthenate 5 ~ 9 parts, N-ethyl, N-phenyl zinc dithiocarbamate 3 ~ 7 parts, sodium oleate 2 ~ 6 parts, ethylene glycol 5 ~ 9 parts, myo-Inositol hexaphosphate 5 ~ 8 parts, aluminium powder 6 ~ 10 parts, 4 ~ 7 parts, barium sulfate, Vltra tears 3 ~ 6 parts, dimethylamino ethyl acrylate 3 ~ 7 parts, sodium allyl sulfonate 4 ~ 9 parts, 12 ~ 17 parts, water.
As the further improvement of foregoing invention, described rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 4 parts, benzotriazole 5 parts, zinc naphthenate 7 parts, N-ethyl, N-phenyl zinc dithiocarbamate 4 parts, sodium oleate 5 parts, ethylene glycol 7 parts, myo-Inositol hexaphosphate 6 parts, aluminium powder 9 parts, 5 parts, barium sulfate, Vltra tears 4 parts, dimethylamino ethyl acrylate 5 parts, sodium allyl sulfonate 7 parts, 16 parts, water.
The preparation method of above-mentioned rust preventive for metal surface, comprises the following steps:
Step 1, is added to the water dodecenylsuccinic acid, benzotriazole and zinc naphthenate, is warming up to 60 ~ 80 DEG C, stirs, and after letting cool, obtains mixture I;
Step 2, adds N-ethyl, N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, myo-Inositol hexaphosphate, aluminium powder and barium sulfate in step 1 gained mixture I, under agitation in 60 ~ 80 DEG C of insulation 2 ~ 5h, after letting cool, obtains mixtures II;
Step 3, adds Vltra tears, dimethylamino ethyl acrylate and sodium allyl sulfonate in step 2 gained mixtures II, under agitation in 60 ~ 80 DEG C of insulation 2 ~ 5h, after letting cool, obtains mixtures III;
Step 4, adds 2-acrylamido dodecyl sodium sulfonate and N,N-DMAA, is warming up to 50 ~ 70 DEG C, stirs, after letting cool, obtain rust-preventive agent in step 3 gained mixtures III.
As the further improvement of foregoing invention, in step 2, the vacuum tightness of insulating process is-0.08 ~-0.1MPa.
As the further improvement of foregoing invention, in step 3, the vacuum tightness of insulating process is-0.08 ~-0.1MPa.
Rust-preventive agent of the present invention can improve the erosion resistance of metallic surface, improves the performance of protective layer damp proof insulation and isolated air, makes it have the rust-proof effect of reliable long period, for metallic substance and metal products provide splendid corrosion protection function.
Embodiment
Embodiment 1
A kind of rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 1 part, benzotriazole 1 part, zinc naphthenate 3 parts, N-ethyl, N-phenyl zinc dithiocarbamate 2 parts, sodium oleate 1 part, ethylene glycol 3 parts, myo-Inositol hexaphosphate 4 parts, aluminium powder 5 parts, 3 parts, barium sulfate, Vltra tears 2 parts, dimethylamino ethyl acrylate 2 parts, sodium allyl sulfonate 3 parts, 10 parts, water.
The preparation method of above-mentioned rust preventive for metal surface, comprises the following steps:
Step 1, is added to the water dodecenylsuccinic acid, benzotriazole and zinc naphthenate, is warming up to 60 DEG C, stirs, and after letting cool, obtains mixture I;
Step 2, N-ethyl, N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, myo-Inositol hexaphosphate, aluminium powder and barium sulfate is added in step 1 gained mixture I, under agitation in 60 DEG C, vacuum tightness for being incubated 5h under-0.08MPa condition, after letting cool, obtain mixtures II;
Step 3, adds Vltra tears, dimethylamino ethyl acrylate and sodium allyl sulfonate in step 2 gained mixtures II, under agitation in 60 DEG C, vacuum tightness for being incubated 5h under-0.08MPa condition, after letting cool, obtain mixtures III;
Step 4, adds 2-acrylamido dodecyl sodium sulfonate and N,N-DMAA, is warming up to 50 DEG C, stirs, after letting cool, obtain rust-preventive agent in step 3 gained mixtures III.
Embodiment 2
A kind of rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 2 parts, benzotriazole 3 parts, zinc naphthenate 5 parts, N-ethyl, N-phenyl zinc dithiocarbamate 3 parts, sodium oleate 2 parts, ethylene glycol 5 parts, myo-Inositol hexaphosphate 5 parts, aluminium powder 6 parts, 4 parts, barium sulfate, Vltra tears 3 parts, dimethylamino ethyl acrylate 3 parts, sodium allyl sulfonate 4 parts, 12 parts, water.
The preparation method of above-mentioned rust preventive for metal surface, comprises the following steps:
Step 1, is added to the water dodecenylsuccinic acid, benzotriazole and zinc naphthenate, is warming up to 65 DEG C, stirs, and after letting cool, obtains mixture I;
Step 2, N-ethyl, N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, myo-Inositol hexaphosphate, aluminium powder and barium sulfate is added in step 1 gained mixture I, under agitation in 70 DEG C, vacuum tightness for being incubated 3h under-0.09MPa condition, after letting cool, obtain mixtures II;
Step 3, adds Vltra tears, dimethylamino ethyl acrylate and sodium allyl sulfonate in step 2 gained mixtures II, under agitation in 70 DEG C, vacuum tightness for being incubated 4h under-0.09MPa condition, after letting cool, obtain mixtures III;
Step 4, adds 2-acrylamido dodecyl sodium sulfonate and N,N-DMAA, is warming up to 55 DEG C, stirs, after letting cool, obtain rust-preventive agent in step 3 gained mixtures III.
Embodiment 3
A kind of rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 4 parts, benzotriazole 5 parts, zinc naphthenate 7 parts, N-ethyl, N-phenyl zinc dithiocarbamate 4 parts, sodium oleate 5 parts, ethylene glycol 7 parts, myo-Inositol hexaphosphate 6 parts, aluminium powder 9 parts, 5 parts, barium sulfate, Vltra tears 4 parts, dimethylamino ethyl acrylate 5 parts, sodium allyl sulfonate 7 parts, 16 parts, water.
The preparation method of above-mentioned rust preventive for metal surface, comprises the following steps:
Step 1, is added to the water dodecenylsuccinic acid, benzotriazole and zinc naphthenate, is warming up to 75 DEG C, stirs, and after letting cool, obtains mixture I;
Step 2, N-ethyl, N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, myo-Inositol hexaphosphate, aluminium powder and barium sulfate is added in step 1 gained mixture I, under agitation in 75 DEG C, vacuum tightness for being incubated 4h under-0.08MPa condition, after letting cool, obtain mixtures II;
Step 3, adds Vltra tears, dimethylamino ethyl acrylate and sodium allyl sulfonate in step 2 gained mixtures II, under agitation in 75 DEG C, vacuum tightness for being incubated 3h under-0.08MPa condition, after letting cool, obtain mixtures III;
Step 4, adds 2-acrylamido dodecyl sodium sulfonate and N,N-DMAA, is warming up to 60 DEG C, stirs, after letting cool, obtain rust-preventive agent in step 3 gained mixtures III.
Embodiment 4
A kind of rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 5 parts, benzotriazole 6 parts, zinc naphthenate 9 parts, N-ethyl, N-phenyl zinc dithiocarbamate 7 parts, sodium oleate 6 parts, ethylene glycol 9 parts, myo-Inositol hexaphosphate 8 parts, aluminium powder 10 parts, 7 parts, barium sulfate, Vltra tears 6 parts, dimethylamino ethyl acrylate 7 parts, sodium allyl sulfonate 9 parts, 17 parts, water.
The preparation method of above-mentioned rust preventive for metal surface, comprises the following steps:
Step 1, is added to the water dodecenylsuccinic acid, benzotriazole and zinc naphthenate, is warming up to 70 DEG C, stirs, and after letting cool, obtains mixture I;
Step 2, N-ethyl, N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, myo-Inositol hexaphosphate, aluminium powder and barium sulfate is added in step 1 gained mixture I, under agitation in 65 DEG C, vacuum tightness for being incubated 4h under-0.09MPa condition, after letting cool, obtain mixtures II;
Step 3, adds Vltra tears, dimethylamino ethyl acrylate and sodium allyl sulfonate in step 2 gained mixtures II, under agitation in 70 DEG C, vacuum tightness for being incubated 3h under-0.09MPa condition, after letting cool, obtain mixtures III;
Step 4, adds 2-acrylamido dodecyl sodium sulfonate and N,N-DMAA, is warming up to 65 DEG C, stirs, after letting cool, obtain rust-preventive agent in step 3 gained mixtures III.
Embodiment 5
A kind of rust preventive for metal surface, comprises with parts by weight: dodecenylsuccinic acid 6 parts, benzotriazole 8 parts, zinc naphthenate 10 parts, N-ethyl, N-phenyl zinc dithiocarbamate 8 parts, sodium oleate 7 parts, ethylene glycol 11 parts, myo-Inositol hexaphosphate 10 parts, aluminium powder 12 parts, 9 parts, barium sulfate, Vltra tears 8 parts, dimethylamino ethyl acrylate 9 parts, sodium allyl sulfonate 10 parts, 18 parts, water.
The preparation method of above-mentioned rust preventive for metal surface, comprises the following steps:
Step 1, is added to the water dodecenylsuccinic acid, benzotriazole and zinc naphthenate, is warming up to 80 DEG C, stirs, and after letting cool, obtains mixture I;
Step 2, N-ethyl, N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, myo-Inositol hexaphosphate, aluminium powder and barium sulfate is added in step 1 gained mixture I, under agitation in 80 DEG C, vacuum tightness for being incubated 2h under-0.1MPa condition, after letting cool, obtain mixtures II;
Step 3, adds Vltra tears, dimethylamino ethyl acrylate and sodium allyl sulfonate in step 2 gained mixtures II, under agitation in 80 DEG C, vacuum tightness for being incubated 5h under-0.1MPa condition, after letting cool, obtain mixtures III;
Step 4, adds 2-acrylamido dodecyl sodium sulfonate and N,N-DMAA, is warming up to 70 DEG C, stirs, after letting cool, obtain rust-preventive agent in step 3 gained mixtures III.
Performance test:
The rust-preventive agent of embodiment 1 to 5 gained is carried out performance measurement, and makes comparisons with commercially available prod, commercially available prod take nitrite as the metal rust-inhibiting liquid of main rust-preventive agent.Wherein property indices measures respectively as follows:
Test method:
1. rust prevention test
Present method is used to check that the rust protection liquid made is to the antirust ability of metal.
Testing sequence:
(1) test piece gauze is polished, dry up after cleaning with gasoline → gasoline → ethanol → ethanol successively, stand-by.
(2) in beaker, prepare the rust protection liquid 100ml of 4% concentration, dip the solution prepared with round end glass stick, processed good test piece drips 5, and often dripping diameter is 4 ~ 5mm, should keep certain distance, must not connect between each.Get a test piece simultaneously and make blank.
(3) test piece is dried after put on the porcelain plate of moistening groove, after building moistening groove lid, be placed in leave standstill under 35 ± 2 DEG C of conditions and place.
Leave standstill after 3 days, all there is not rust staining in test piece entirety, in order to shorten the test period, above-mentioned (3) step is adjusted, and imitates mal-condition, sprays salt fog in test piece, be adjusted to following (4) step.
(4) prepare the NaCl solution of 1%, be sprayed on atomizer and drip in better test piece.Put on the porcelain plate of moistening groove after test piece is dried, after building moistening groove lid, leave standstill under being placed in 35 ± 2 DEG C of conditions and place.
After trial period (one month) is full, observe test piece situation, result is as follows.
| ? | There is corrosion spot number | Rank | Whether qualified |
| Commercially available prod | 2 | A | Qualified |
| Embodiment 1 | 0 | A | Qualified |
| Embodiment 2 | 0 | A | Qualified |
| Embodiment 3 | 0 | A | Qualified |
| Embodiment 4 | 0 | A | Qualified |
| Embodiment 5 | 0 | A | Qualified |
2. corrosion-resistanting test
Present method is soaked in rust protection liquid at a certain temperature by tinsel, after the specified time, evaluates the antiseptic property of rust-preventive agent to metal with metal testing plate colour-change.
Testing sequence:
(1) test piece gauze is polished, dry up after cleaning with gasoline → gasoline → ethanol → ethanol successively, stand-by.
(2) test piece is put into the rust protection liquid bottle filling 4% concentration, make rust protection liquid exceed test piece top and be about 10mm, then build bottle cap, put in the water bath with thermostatic control of 55 ± 2 DEG C and test.
After trial period (one month) is full, observe test piece situation, result is as follows.
| ? | Soak time/sky | Outward appearance | Whether qualified |
| Commercially available prod | 30 | Rustless, than slightly dark before | Defective |
| Embodiment 1 | 30 | Rustless, light newly as before | Qualified |
| Embodiment 2 | 30 | Rustless, light newly as before | Qualified |
| Embodiment 3 | 30 | Rustless, light newly as before | Qualified |
| Embodiment 4 | 30 | Rustless, light newly as before | Qualified |
| Embodiment 5 | 30 | Rustless, light newly as before | Qualified |
As from the foregoing, rust-preventive agent of the present invention can improve the erosion resistance of metallic surface, improves the performance of protective layer damp proof insulation and isolated air, makes it have the rust-proof effect of reliable long period, for metallic substance and metal products provide splendid corrosion protection function.
Claims (6)
1. a rust preventive for metal surface, is characterized in that: comprise with parts by weight: dodecenylsuccinic acid 1 ~ 6 part, benzotriazole 1 ~ 8 part, zinc naphthenate 3 ~ 10 parts, N-ethyl, N-phenyl zinc dithiocarbamate 2 ~ 8 parts, sodium oleate 1 ~ 7 part, ethylene glycol 3 ~ 11 parts, myo-Inositol hexaphosphate 4 ~ 10 parts, aluminium powder 5 ~ 12 parts, 3 ~ 9 parts, barium sulfate, Vltra tears 2 ~ 8 parts, dimethylamino ethyl acrylate 2 ~ 9 parts, sodium allyl sulfonate 3 ~ 10 parts, 10 ~ 18 parts, water.
2. rust preventive for metal surface according to claim 1, it is characterized in that: described rust preventive for metal surface comprises with parts by weight: dodecenylsuccinic acid 2 ~ 5 parts, benzotriazole 3 ~ 6 parts, zinc naphthenate 5 ~ 9 parts, N-ethyl, N-phenyl zinc dithiocarbamate 3 ~ 7 parts, sodium oleate 2 ~ 6 parts, ethylene glycol 5 ~ 9 parts, myo-Inositol hexaphosphate 5 ~ 8 parts, aluminium powder 6 ~ 10 parts, 4 ~ 7 parts, barium sulfate, Vltra tears 3 ~ 6 parts, dimethylamino ethyl acrylate 3 ~ 7 parts, sodium allyl sulfonate 4 ~ 9 parts, 12 ~ 17 parts, water.
3. rust preventive for metal surface according to claim 1, is characterized in that: described rust preventive for metal surface comprises with parts by weight: dodecenylsuccinic acid 4 parts, benzotriazole 5 parts, zinc naphthenate 7 parts, N-ethyl, N-phenyl zinc dithiocarbamate 4 parts, sodium oleate 5 parts, ethylene glycol 7 parts, myo-Inositol hexaphosphate 6 parts, aluminium powder 9 parts, 5 parts, barium sulfate, Vltra tears 4 parts, dimethylamino ethyl acrylate 5 parts, sodium allyl sulfonate 7 parts, 16 parts, water.
4. the preparation method of the rust preventive for metal surface described in any one of claims 1 to 3, is characterized in that: comprise the following steps:
Step 1, is added to the water dodecenylsuccinic acid, benzotriazole and zinc naphthenate, is warming up to 60 ~ 80 DEG C, stirs, and after letting cool, obtains mixture I;
Step 2, adds N-ethyl, N-phenyl zinc dithiocarbamate, sodium oleate, ethylene glycol, myo-Inositol hexaphosphate, aluminium powder and barium sulfate in step 1 gained mixture I, under agitation in 60 ~ 80 DEG C of insulation 2 ~ 5h, after letting cool, obtains mixtures II;
Step 3, adds Vltra tears, dimethylamino ethyl acrylate and sodium allyl sulfonate in step 2 gained mixtures II, under agitation in 60 ~ 80 DEG C of insulation 2 ~ 5h, after letting cool, obtains mixtures III;
Step 4, adds 2-acrylamido dodecyl sodium sulfonate and N,N-DMAA, is warming up to 50 ~ 70 DEG C, stirs, after letting cool, obtain rust-preventive agent in step 3 gained mixtures III.
5. the preparation method of rust preventive for metal surface according to claim 4, is characterized in that: in step 2, the vacuum tightness of insulating process is-0.08 ~-0.1MPa.
6. the preparation method of rust preventive for metal surface according to claim 4, is characterized in that: in step 3, the vacuum tightness of insulating process is-0.08 ~-0.1MPa.
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| CN201410499002.XA CN104213126B (en) | 2014-09-25 | 2014-09-25 | A kind of rust preventive for metal surface and preparation method thereof |
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| CN104911572A (en) * | 2015-04-28 | 2015-09-16 | 太仓市林源电线电缆有限公司 | Electrician copper soft flexible stranded wire antirust agent |
| CN106978016A (en) * | 2017-04-06 | 2017-07-25 | 天长市润达金属防锈助剂有限公司 | A kind of metal antirusting agent with excellent damping performance |
| CN114164036A (en) * | 2021-12-16 | 2022-03-11 | 武汉工程大学 | Rust-removing and rust-preventing agent and synthesis process and application thereof |
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| JP2004307755A (en) * | 2003-04-10 | 2004-11-04 | Unitika Ltd | Rust prevention coating agent and laminated metal material |
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| CN104911572A (en) * | 2015-04-28 | 2015-09-16 | 太仓市林源电线电缆有限公司 | Electrician copper soft flexible stranded wire antirust agent |
| CN104911572B (en) * | 2015-04-28 | 2018-05-01 | 太仓市林源电线电缆有限公司 | A kind of electrician's copper soft whipping wire antirust agent |
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| CN104213126B (en) | 2016-09-28 |
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Inventor after: Cai Yusen Inventor before: Chen Ling Inventor before: Wang Yan Inventor before: Ren Qi Inventor before: Cheng Xiao |
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Effective date of registration: 20170718 Address after: 515000 Industrial Building, switch factory, No. 6 West River Road, Guangdong, Shantou Patentee after: Shantou City Machinery Industry Co., Ltd. Address before: 214000 Huishan Economic Development Zone, Jiangsu province Hui Cheng Road, No. 77, No. Patentee before: Wuxi Kangbaisi Machinery Technology Co., Ltd. |
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Granted publication date: 20160928 Termination date: 20190925 |