CN111534813B - Metal protective agent and preparation method and application thereof - Google Patents
Metal protective agent and preparation method and application thereof Download PDFInfo
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- CN111534813B CN111534813B CN202010358781.7A CN202010358781A CN111534813B CN 111534813 B CN111534813 B CN 111534813B CN 202010358781 A CN202010358781 A CN 202010358781A CN 111534813 B CN111534813 B CN 111534813B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to the technical field of material protection. The invention provides a metal protective agent, wherein lone-pair electrons in each component are combined with empty orbitals on the surface of metal to form coordination bonds which are adsorbed on the surface of metal to form a protective film, so that the transfer of charges or substances related to corrosion reaction is hindered, and the corrosion process is slowed down. The protective film has large adsorption acting force and strong adsorption capacity, cannot be easily damaged after being formed, and can protect metal for a long time. The invention also provides a preparation method of the metal protective agent, which is simple to operate, can stir step by step, does not need heating, and reduces the requirements on process conditions. The invention also provides application of the metal protective agent in metal protection, which can effectively prevent corrosion and bring a new direction for metal protection. The invention does not contain toxic and harmful ions, can be automatically degraded by emission, has no secondary pollution, and is a novel green and environment-friendly product.
Description
Technical Field
The invention relates to the technical field of material protection, in particular to a metal protective agent and a preparation method and application thereof.
Background
Corrosion of metal equipment and pipes by water is a significant cause of shortened equipment life, material loss and deterioration in performance, and accounts for hundreds of millions of economic losses each year. The conventional method of protection is to drain the water for natural storage, but this accelerates the corrosion by oxygen. In order to avoid reducing the possibility of corrosion and the economic loss, various metal protective agents are developed in the prior art, and at present, the domestic metal protective agents are divided into: liquid phase, gas phase, solid phase, coating, etc. to prevent corrosion of the metal. However, there are many problems associated with the several preservation methods described above. In the coating method, most products need to reach a certain fineness requirement, are dispersed and then are baked at high temperature to form a film, the required temperature is high, dust generated in the processing process can have certain influence on the health of operators, and the coating method is only suitable for the anticorrosion protection of metal parts and cannot protect large-scale industrial equipment and facilities. Some liquid phase protection methods contain partial substances such as phosphorus, mercaptan and the like, the water body is eutrophicated due to abundant phosphorus, the water body smells due to long-time storage, toxic malodorous gas is generated by the mercaptan substances, and the physical health of workers is affected in the actual operation process. Part of the liquid phase protective agent is added into industrial equipment, has strict requirements on temperature, and can fully play a role only by keeping the temperature of 50-60 ℃. On the other hand, when the protective agent is added, the protective agent needs to be added again for many times, the protection time is short, the protection time is 30 days to 6 months, and once the protection time is exceeded, the protective agent needs to be added again, so that the labor intensity of workers is increased, and the economic burden is increased.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a metal protective agent and application thereof in metal protection.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a metal protective agent which comprises the following components in parts by weight: 1-5 parts of N-lauroyl-L-sodium glutamate, 4-8 parts of amino acid, 1-5 parts of chitosan, 15-25 parts of sebacic acid diethanolamine, 0.5-1.5 parts of morpholine, 1-3 parts of dimethyl ketoxime, 2-6 parts of sodium molybdate, 3-7 parts of citrate, 0.5-1.5 parts of lanthanum acetate and 50-60 parts of water.
Preferably, the amino acid comprises tryptophan, glutamic acid and aspartic acid, and the mass ratio of the tryptophan to the glutamic acid to the aspartic acid is (0.5-1.5): (0.5-1.5): (0.5 to 1.5).
Preferably, the citrate comprises cerium citrate and lanthanum citrate, and the mass ratio of the cerium citrate to the lanthanum citrate is (1-4): (1-4).
The invention also provides a preparation method of the metal protective agent, which comprises the following steps:
(1) mixing amino acid, chitosan, citrate, lanthanum acetate, sodium molybdate and water to obtain a solution A;
(2) mixing the solution A with dimethyl ketoxime to obtain a solution B;
(3) and mixing the solution B with the rest components to obtain the metal protective agent.
Preferably, the mixing in the step (1) is performed under stirring conditions, the rotation speed of the stirring is 160-200 rpm, and the stirring time is 20-40 min.
Preferably, the mixing in the step (2) is performed under stirring conditions, the rotation speed of the stirring is 160-200 rpm, and the stirring time is 5-15 min.
Preferably, the mixing in the step (3) is performed under stirring conditions, the rotation speed of the stirring is 160-200 rpm, and the stirring time is 50-70 min.
The invention also provides application of the metal protective agent in metal protection.
The invention provides a metal protective agent, wherein lone-pair electrons in each component are combined with empty orbitals on the surface of metal to form coordination bonds which are adsorbed on the surface of metal to form a protective film, so that the transfer of charges or substances related to corrosion reaction is hindered, and the corrosion process is slowed down. The protective film has large adsorption acting force and strong adsorption capacity, cannot be easily damaged after being formed, and can protect metal for a long time.
The invention also provides a preparation method of the metal protective agent, which is simple to operate, can stir step by step, does not need heating, and reduces the requirements on process conditions.
The invention also provides the application of the metal protective agent in metal protection, which can effectively prevent corrosion and bring a new direction for metal protection.
Detailed Description
The invention provides a metal protective agent which comprises the following components in parts by weight: 1-5 parts of N-lauroyl-L-sodium glutamate, 4-8 parts of amino acid, 1-5 parts of chitosan, 15-25 parts of sebacic acid diethanolamine, 0.5-1.5 parts of morpholine, 1-3 parts of dimethyl ketoxime, 2-6 parts of sodium molybdate, 3-7 parts of citrate, 0.5-1.5 parts of lanthanum acetate and 50-60 parts of water.
In the present invention, the amount of the sodium N-lauroyl-L-glutamate is 1 to 5 parts, preferably 2 to 4 parts, and more preferably 2.5 to 3.5 parts.
In the present invention, the amino acid is 4 to 8 parts, preferably 5 to 7 parts, and more preferably 5.5 to 6.5 parts.
In the invention, the amino acid preferably comprises tryptophan, glutamic acid and aspartic acid, and the mass ratio of the tryptophan, the glutamic acid and the aspartic acid is preferably (0.5-1.5): (0.5-1.5): (0.5 to 1.5), more preferably (0.7 to 1.3): (0.7-1.3): (0.7-1.3), more preferably (0.9-1.1): (0.9-1.1): (0.9-1.1).
In the invention, the chitosan is 1-5 parts, preferably 2-4 parts, and more preferably 2.5-3.5 parts.
In the invention, chitosan is used as a bacteriostatic agent, so that the breeding of bacteria can be effectively inhibited, the protective film on the metal surface is prevented from being damaged, and the possibility of corrosion is reduced.
In the invention, the sebacic acid diethanol amine is 15-25 parts, preferably 17-23 parts, and more preferably 19-21 parts.
In the present invention, the morpholine is 0.5 to 1.5 parts, preferably 0.7 to 1.3 parts, and more preferably 0.9 to 1.1 parts.
In the invention, the amino acid, the sebacic acid diethanol amine and the morpholine are used as a complexing adsorbent to form a good adsorption film on the metal surface, so that oxygen corrosion and corrosion of other factors are prevented.
In the invention, the dimethyl ketoxime is 1-3 parts, preferably 1.2-2.8 parts, and more preferably 1.6-2.4 parts.
In the invention, the dimethyl ketoxime is used as an oxygen scavenger, can quickly reduce dissolved oxygen in water, has corrosion inhibition and passivation effects on the metal surface, and has the advantages of low consumption, no toxicity, and no pollution in discharge.
In the invention, the sodium molybdate is 2-6 parts, preferably 3-5 parts, and more preferably 3.5-4.5 parts.
In the invention, the citrate is 3-7 parts, preferably 4-6 parts, and more preferably 4.5-5.5 parts.
In the invention, the citrate preferably comprises cerium citrate and lanthanum citrate, and the mass ratio of the cerium citrate to the lanthanum citrate is (1-4): (1-4), more preferably (2-3): (2-3), more preferably (2.4-2.6): (2.4-2.6).
In the invention, the lanthanum acetate is 0.5-1.5 parts, preferably 0.7-1.3 parts, and more preferably 0.9-1.1 parts.
In the invention, the citrate, the lanthanum acetate and the sodium molybdate are used as film forming agents to form a good precipitation film on the metal surface, so that the metal surface is more compact.
In the present invention, the amount of the water is 50 to 60 parts, preferably 52 to 58 parts, and more preferably 54 to 56 parts.
The invention also provides a preparation method of the metal protective agent, which comprises the following steps:
(1) mixing amino acid, chitosan, citrate, lanthanum acetate, sodium molybdate and water to obtain a solution A;
(2) mixing the solution A with dimethyl ketoxime to obtain a solution B;
(3) and mixing the solution B with the rest components to obtain the metal protective agent.
In the invention, the mixing in the step (1) is preferably carried out under stirring conditions, and the stirring rotation speed is preferably 160-200 rpm, more preferably 170-190 rpm, and more preferably 175-185 rpm; the stirring time is preferably 20-40 min, more preferably 22-38 min, and even more preferably 28-32 min.
In the invention, the mixing in the step (2) is preferably carried out under stirring conditions, and the stirring rotation speed is preferably 160-200 rpm, more preferably 170-190 rpm, and more preferably 175-185 rpm; the stirring time is preferably 5-15 min, more preferably 8-12 min, and even more preferably 9-11 min.
In the invention, the mixing in the step (3) is preferably carried out under stirring conditions, and the stirring rotation speed is preferably 160-200 rpm, more preferably 170-190 rpm, and more preferably 175-185 rpm; the stirring time is preferably 50-70 min, more preferably 54-66 min, and even more preferably 58-62 min.
The invention also provides application of the metal protective agent in metal protection.
In the invention, the metal protective agent is preferably mixed with water to prepare a mixed solution for protecting metal, and the dosage ratio of the metal protective agent to the water is preferably (5000-7000) mg: 1L, more preferably (5300 to 6700) mg: 1L, more preferably (5600 to 6400) mg: 1L of the compound.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The metal protective agent comprises the following components in parts by weight: 3 parts of N-lauroyl-L-sodium glutamate, 2 parts of tryptophan, 2 parts of glutamic acid, 2 parts of aspartic acid, 3 parts of chitosan, 20 parts of sebacic acid diethanolamine, 1.2 parts of morpholine, 2 parts of dimethyl ketoxime, 4 parts of sodium molybdate, 3 parts of cerium citrate, 3 parts of lanthanum citrate, 1.2 parts of lanthanum acetate and 55 parts of water.
Example 2
The metal protective agent comprises the following components in parts by weight: 4 parts of N-lauroyl-L-sodium glutamate, 2.5 parts of tryptophan, 2.5 parts of glutamic acid, 2.5 parts of aspartic acid, 4 parts of chitosan, 22 parts of sebacic acid diethanolamine, 1 part of morpholine, 2.3 parts of dimethyl ketoxime, 5 parts of sodium molybdate, 2 parts of cerium citrate, 2 parts of lanthanum citrate, 1 part of lanthanum acetate and 56 parts of water.
Example 3
The metal protective agent comprises the following components in parts by weight: 3 parts of N-lauroyl-L-sodium glutamate, 1.5 parts of tryptophan, 1.5 parts of glutamic acid, 1.5 parts of aspartic acid, 3 parts of chitosan, 15 parts of sebacic acid diethanolamine, 0.8 part of morpholine, 1.5 parts of dimethyl ketoxime, 4 parts of sodium molybdate, 2.5 parts of cerium citrate, 2.5 parts of lanthanum citrate, 1.3 parts of lanthanum acetate and 58 parts of water.
Example 4
The metal protective agent comprises the following components in parts by mass: 4.5 parts of N-lauroyl-L-sodium glutamate, 3 parts of tryptophan, 3 parts of glutamic acid, 2 parts of aspartic acid, 2.5 parts of chitosan, 23 parts of sebacic acid diethanolamine, 1.4 parts of morpholine, 2.3 parts of dimethyl ketoxime, 3 parts of sodium molybdate, 3 parts of cerium citrate, 3 parts of lanthanum citrate, 1.4 parts of lanthanum acetate and 53 parts of water.
Comparative example 1
The protective agent comprises the following components in parts by mass: 3 parts of N-lauroyl-L-sodium glutamate, 2 parts of tryptophan, 2 parts of glutamic acid, 2 parts of aspartic acid, 20 parts of sebacic acid diethanolamine, 1.2 parts of morpholine, 4 parts of sodium molybdate, 3 parts of cerium citrate, 3 parts of lanthanum citrate, 1.2 parts of lanthanum acetate and 55 parts of water.
Comparative example 2
The protective agent comprises the following components in parts by mass: 3 parts of N-lauroyl-L-sodium glutamate, 2 parts of tryptophan, 2 parts of glutamic acid, 2 parts of aspartic acid, 3 parts of chitosan, 20 parts of sebacic acid diethanolamine, 1.2 parts of morpholine, 2 parts of dimethyl ketoxime, 1.2 parts of lanthanum acetate and 55 parts of water.
Application example 1
The application example used the metal protectant in example 1.
Mixing amino acid, chitosan, citrate, lanthanum acetate, sodium molybdate and water, and stirring at the speed of 180rpm for 30min to obtain a solution A;
mixing the solution A and dimethyl ketoxime, and stirring at the speed of 180rpm for 10min to obtain a solution B;
and mixing the solution B and the rest components, and stirring at the speed of 180rpm for 60min to obtain the metal protective agent.
The resulting metal protectant was mixed with water at room temperature at 6000 mg: the dosage ratio of 1L is placed in a container, stainless steel, aluminum, copper alloy and A3 steel are respectively hung in the container filled with the solution for 43800h at room temperature, and the experimental results are respectively recorded in tables 1-4.
Application example 2
The application example uses the metal protectant in example 2.
The same preparation process and test procedure as in application example 1 were used in this application example.
The results of the present application example are shown in tables 1 to 4, respectively.
Application example 3
The application example used the metal protectant in example 3.
The same preparation process and test procedure as in application example 1 were used in this application example.
The results of the present application example are shown in tables 1 to 4, respectively.
Application example 4
The application example uses the metal protectant in example 4.
The same preparation process and test procedure as in application example 1 were used in this application example.
The results of the present application example are respectively recorded in tables 1 to 4.
Application comparative example 1
The application comparative example adopts the protective agent in the comparative example 1.
The comparative example of this application used the same preparation process and test procedure as in application example 1.
The results of the comparative examples of this application are reported in tables 1 to 4, respectively.
Comparative application example 2
The application comparative example adopts the protective agent in the comparative example 2.
The comparative example of this application used the same preparation process and test procedure as in application example 1.
The results of the comparative examples of this application are reported in tables 1 to 4, respectively.
TABLE 1 stainless Steel test results
TABLE 2 aluminum test results
TABLE 3 copper alloy test results
TABLE 4A 3 Steel Experimental results
The embodiment shows that the long-acting metal protective agent provided by the invention is simple to use and small in dosage; the scale layer has strong permeability, can permeate to the lower part of the original scale layer to be in contact with metal to be adsorbed or complexed on the surface of the metal to form a protective film, can well protect the metal at normal temperature, and does not have any newly generated corrosion trace and rusting phenomenon on the metal surface of equipment. And the environment is not polluted, and the pollution-free effect is avoided.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The metal protective agent is characterized by comprising the following components in parts by mass: 1-5 parts of N-lauroyl-L-sodium glutamate, 4-8 parts of amino acid, 1-5 parts of chitosan, 15-25 parts of sebacic acid diethanolamine, 0.5-1.5 parts of morpholine, 1-3 parts of dimethyl ketoxime, 2-6 parts of sodium molybdate, 3-7 parts of citrate, 0.5-1.5 parts of lanthanum acetate and 50-60 parts of water;
the amino acid comprises tryptophan, glutamic acid and aspartic acid, and the mass ratio of the tryptophan to the glutamic acid to the aspartic acid is (0.5-1.5): (0.5-1.5): (0.5-1.5).
2. The metal protectant according to claim 1, wherein the citrate comprises cerium citrate and lanthanum citrate, and the mass ratio of the cerium citrate to the lanthanum citrate is (1-4): (1-4).
3. A method for producing the metal protecting agent according to claim 1 or 2, characterized by comprising the steps of:
(1) mixing amino acid, chitosan, citrate, lanthanum acetate, sodium molybdate and water to obtain a solution A;
(2) mixing the solution A with dimethyl ketoxime to obtain a solution B;
(3) and mixing the solution B with the rest components to obtain the metal protective agent.
4. The method according to claim 3, wherein the mixing in step (1) is performed under stirring conditions, wherein the stirring speed is 160 to 200rpm, and the stirring time is 20 to 40 min.
5. The method according to claim 4, wherein the mixing in the step (2) is performed under stirring conditions, wherein the rotation speed of the stirring is 160 to 200rpm, and the stirring time is 5 to 15 min.
6. The method according to any one of claims 3 to 5, wherein the mixing in step (3) is performed under stirring conditions, wherein the stirring speed is 160 to 200rpm, and the stirring time is 50 to 70 min.
7. Use of the metal protectant according to claim 1 or 2 for protecting a metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010358781.7A CN111534813B (en) | 2020-04-29 | 2020-04-29 | Metal protective agent and preparation method and application thereof |
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| CN202010358781.7A CN111534813B (en) | 2020-04-29 | 2020-04-29 | Metal protective agent and preparation method and application thereof |
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| CN111534813A CN111534813A (en) | 2020-08-14 |
| CN111534813B true CN111534813B (en) | 2022-06-03 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2614234C2 (en) * | 1976-04-02 | 1982-05-27 | Metallgesellschaft Ag, 6000 Frankfurt | Treatment liquid for the corrosion protection of metal surfaces and concentrate for their production |
| CN104357850A (en) * | 2014-11-14 | 2015-02-18 | 无锡伊佩克科技有限公司 | Metal surface antirust solution and preparation method thereof |
| CN105369255A (en) * | 2015-11-25 | 2016-03-02 | 青岛祥嘉知识产权服务有限公司 | Antirust agent for metal die |
| CN105753183A (en) * | 2016-04-15 | 2016-07-13 | 安徽马钢和菱实业有限公司 | Multiple composite corrosion inhibitor and preparation method thereof |
| CN107475721B (en) * | 2017-09-13 | 2019-12-03 | 中国人民解放军装甲兵工程学院 | Rust inhibitor and its preparation method and application |
| CN108034954A (en) * | 2017-11-30 | 2018-05-15 | 珠海横琴思国科技发展有限公司 | A kind of anti-rust cleaning agent of aluminium and aluminium alloy and preparation method thereof |
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