CN113045255A - Antifreezing high-temperature-resistant concrete repairing agent and preparation method thereof - Google Patents
Antifreezing high-temperature-resistant concrete repairing agent and preparation method thereof Download PDFInfo
- Publication number
- CN113045255A CN113045255A CN202110375592.5A CN202110375592A CN113045255A CN 113045255 A CN113045255 A CN 113045255A CN 202110375592 A CN202110375592 A CN 202110375592A CN 113045255 A CN113045255 A CN 113045255A
- Authority
- CN
- China
- Prior art keywords
- parts
- sodium
- cement
- temperature
- river sand
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses an antifreezing high-temperature resistant concrete repairing agent and a preparation method thereof, wherein the method comprises the following steps: heating acrylic acid to 90 ℃, adding sodium dodecyl benzene sulfonate, propyl acetate and ethylenediamine tetraacetic acid, mixing uniformly, then adding water and stirring uniformly; cooling to 60-70 ℃, adding calcium oxide, cumene hydroperoxide, sodium sulfite, sodium hydroxide, sodium hypochlorite and urea, and reacting for 2-5 h; adding cement and river sand, and stirring for 5-10 min. The invention does not crack under extreme environment, has excellent heat resistance and frost resistance as a repairing agent for buildings, and has wide application.
Description
Technical Field
The invention belongs to the field of buildings, and particularly relates to an anti-freezing high-temperature-resistant concrete repairing agent and a preparation method thereof.
Background
The pavement concrete healant in the prior art has various styles.
Chinese patent application with the application number of CN200910175217.5 discloses a preparation method of a modified resin stone adhesive, which comprises the steps of firstly placing bisphenol epoxy resin, benzyl dimethylamine and benzenediol in a vacuum reaction kettle for stirring, heating to 130-150 ℃ for reaction for 2 hours, and then adding sodium hydroxide to regulate the pH value to 6.5-7.5; cooling the reactant to 110 ℃, adding styrene for dilution, uniformly stirring when the temperature is reduced to room temperature, and obtaining modified bisphenol epoxy resin through reduced pressure distillation; adding methacrylic acid into the modified bisphenol epoxy resin, and stirring for 2-3 h at a stirring speed of 300 r/min; and adding a curing agent and a regulator into the stirred solution, and finally washing and filtering to obtain the modified resin stone adhesive. The invention has the advantages that: the stone adhesive is prepared from the modified bisphenol epoxy resin, the modified bisphenol epoxy resin has strong impact resistance and cohesiveness, and meanwhile, the curing speed in the preparation process can be increased, and the preparation efficiency is effectively improved.
Disclosure of Invention
The invention provides an antifreezing high-temperature-resistant concrete repairing agent and a preparation method thereof, aiming at solving the defects of the prior art, and the concrete repairing agent has good heat resistance and frost resistance.
In order to solve the technical problems, the invention adopts the following technical scheme:
the anti-freezing high-temperature-resistant concrete repairing agent comprises the following raw materials in parts by weight: 50-60 parts of acrylic acid, 10-20 parts of sodium dodecyl benzene sulfonate, 10-20 parts of propyl acetate, 40-60 parts of ethylene diamine tetraacetic acid, 500 parts of 220-sodium ion, 20-30 parts of calcium oxide, 20-30 parts of cumene hydroperoxide, 10-20 parts of sodium sulfite, 30-50 parts of sodium hydroxide, 30-40 parts of sodium hypochlorite, 20-30 parts of urea, 30-100 parts of cement and 10-30 parts of river sand.
Preferably, the antifreezing high-temperature resistant concrete repairing agent comprises the following raw materials in parts by weight: 55 parts of acrylic acid, 15 parts of sodium dodecyl benzene sulfonate, 15 parts of propyl acetate, 50 parts of ethylene diamine tetraacetic acid, 300 parts of water, 25 parts of calcium oxide, 25 parts of cumene hydroperoxide, 15 parts of sodium sulfite, 40 parts of sodium hydroxide, 35 parts of sodium hypochlorite, 25 parts of urea, 60 parts of cement and 20 parts of river sand.
Preferably, the antifreezing high-temperature resistant concrete repairing agent comprises the following raw materials in parts by weight: 50 parts of acrylic acid, 10 parts of sodium dodecyl benzene sulfonate, 10 parts of propyl acetate, 40 parts of ethylene diamine tetraacetic acid, 220 parts of water, 20 parts of calcium oxide, 20 parts of cumene hydroperoxide, 10 parts of sodium sulfite, 30 parts of sodium hydroxide, 30 parts of sodium hypochlorite, 20 parts of urea, 30 parts of cement and 10 parts of river sand.
Preferably, the antifreezing high-temperature resistant concrete repairing agent comprises the following raw materials in parts by weight: 60 parts of acrylic acid, 20 parts of sodium dodecyl benzene sulfonate, 20 parts of propyl acetate, 60 parts of ethylene diamine tetraacetic acid, 500 parts of water, 30 parts of calcium oxide, 30 parts of cumene hydroperoxide, 20 parts of sodium sulfite, 50 parts of sodium hydroxide, 40 parts of sodium hypochlorite, 30 parts of urea, 100 parts of cement and 30 parts of river sand.
Preferably, the cement is portland cement.
Preferably, the river sand has a particle size of 0.1-0.8 mm.
The preparation method of the antifreezing high-temperature resistant concrete healant comprises the following steps: heating acrylic acid to 90 ℃, adding sodium dodecyl benzene sulfonate, propyl acetate and ethylenediamine tetraacetic acid, mixing uniformly, then adding water and stirring uniformly; cooling to 60-70 ℃, adding calcium oxide, cumene hydroperoxide, sodium sulfite, sodium hydroxide, sodium hypochlorite and urea, and reacting for 2-5 h; adding cement and river sand, and stirring for 5-10 min.
The invention has the following beneficial effects: the invention has excellent performance and wide application as a repairing agent for buildings. The addition of cumene hydroperoxide can obviously improve the heat resistance and the freezing resistance of the invention, and the invention does not crack under extreme environment.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The anti-freezing high-temperature-resistant concrete repairing agent comprises the following raw materials in parts by weight: 55 parts of acrylic acid, 15 parts of sodium dodecyl benzene sulfonate, 15 parts of propyl acetate, 50 parts of ethylene diamine tetraacetic acid, 300 parts of water, 25 parts of calcium oxide, 25 parts of cumene hydroperoxide, 15 parts of sodium sulfite, 40 parts of sodium hydroxide, 35 parts of sodium hypochlorite, 25 parts of urea, 60 parts of portland cement and 20 parts of river sand.
The grain diameter of the river sand is 0.1-0.8 mm.
The preparation method of the antifreezing high-temperature resistant concrete healant comprises the following steps: heating acrylic acid to 90 ℃, adding sodium dodecyl benzene sulfonate, propyl acetate and ethylenediamine tetraacetic acid, mixing uniformly, then adding water and stirring uniformly; cooling to 60-70 ℃, adding calcium oxide, cumene hydroperoxide, sodium sulfite, sodium hydroxide, sodium hypochlorite and urea, and reacting for 3 h; adding cement and river sand, and stirring for 8 min.
Example 2
The anti-freezing high-temperature-resistant concrete repairing agent comprises the following raw materials in parts by weight: 50 parts of acrylic acid, 10 parts of sodium dodecyl benzene sulfonate, 10 parts of propyl acetate, 40 parts of ethylene diamine tetraacetic acid, 220 parts of water, 20 parts of calcium oxide, 20 parts of cumene hydroperoxide, 10 parts of sodium sulfite, 30 parts of sodium hydroxide, 30 parts of sodium hypochlorite, 20 parts of urea, 30 parts of silicate cement and 10 parts of river sand.
The grain diameter of the river sand is 0.1-0.8 mm.
The preparation method of the antifreezing high-temperature resistant concrete healant comprises the following steps: heating acrylic acid to 90 ℃, adding sodium dodecyl benzene sulfonate, propyl acetate and ethylenediamine tetraacetic acid, mixing uniformly, then adding water and stirring uniformly; cooling to 60-70 ℃, adding calcium oxide, cumene hydroperoxide, sodium sulfite, sodium hydroxide, sodium hypochlorite and urea, and reacting for 5 hours; adding cement and river sand, and stirring for 5 min.
Example 3
The anti-freezing high-temperature-resistant concrete repairing agent comprises the following raw materials in parts by weight: 60 parts of acrylic acid, 20 parts of sodium dodecyl benzene sulfonate, 20 parts of propyl acetate, 60 parts of ethylene diamine tetraacetic acid, 500 parts of water, 30 parts of calcium oxide, 30 parts of cumene hydroperoxide, 20 parts of sodium sulfite, 50 parts of sodium hydroxide, 40 parts of sodium hypochlorite, 30 parts of urea, 100 parts of portland cement and 30 parts of river sand.
The grain diameter of the river sand is 0.1-0.8 mm.
The preparation method of the antifreezing high-temperature resistant concrete healant comprises the following steps: heating acrylic acid to 90 ℃, adding sodium dodecyl benzene sulfonate, propyl acetate and ethylenediamine tetraacetic acid, mixing uniformly, then adding water and stirring uniformly; cooling to 60-70 ℃, adding calcium oxide, cumene hydroperoxide, sodium sulfite, sodium hydroxide, sodium hypochlorite and urea, and reacting for 2 h; adding cement and river sand, and stirring for 10 min.
Comparative example 1
The difference from example 1 is that: cumene hydroperoxide was not added.
The anti-freezing high-temperature-resistant concrete repairing agent comprises the following raw materials in parts by weight: 55 parts of acrylic acid, 15 parts of sodium dodecyl benzene sulfonate, 15 parts of propyl acetate, 50 parts of ethylene diamine tetraacetic acid, 300 parts of water, 25 parts of calcium oxide, 15 parts of sodium sulfite, 40 parts of sodium hydroxide, 35 parts of sodium hypochlorite, 25 parts of urea, 60 parts of portland cement and 20 parts of river sand.
The grain diameter of the river sand is 0.1-0.8 mm.
The preparation method of the antifreezing high-temperature resistant concrete healant comprises the following steps: heating acrylic acid to 90 ℃, adding sodium dodecyl benzene sulfonate, propyl acetate and ethylenediamine tetraacetic acid, mixing uniformly, then adding water and stirring uniformly; cooling to 60-70 ℃, adding calcium oxide, sodium sulfite, sodium hydroxide, sodium hypochlorite and urea, and reacting for 3 h; adding cement and river sand, and stirring for 8 min.
And (3) performance testing:
the concrete repairing agent for the building is made into a concrete block with the thickness of 5 mm. The hot water of 100 ℃ is continuously poured for 5h to determine the heat resistance, and the cold air of-20 ℃ is sprayed for 30 times to determine the frost resistance.
TABLE 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Heat resistance | Without cracking | Without cracking | Without cracking | Slight cracking |
| Freezing resistance | Without cracking | Without cracking | Without cracking | Has large cracking |
In the invention, the addition of the cumene hydroperoxide can obviously improve the heat resistance and the freezing resistance of the invention, and the invention does not crack under extreme environment, and has excellent performance and wide application as a repairing agent for buildings.
The concrete repairing agent prepared in the above examples and comparative examples was subjected to performance test according to the standard of "GB 8076-2008 concrete admixture":
the water reducing performance and water resistance of the concrete repair agent are shown in table 2:
TABLE 2
As can be seen from the above table, the water-reducing performance and the water-proof performance of examples 1 to 3 are significantly better than those of comparative example 1, and due to the addition of cumene hydroperoxide, it can be found that the water-reducing performance and the water-proof performance are better, and the gaps in the concrete are smaller and smaller, so that certain water-reducing performance and water-proof performance are also improved.
The concrete healant was tested for freeze protection and expansion and the results are shown in table 3:
TABLE 3
As can be seen from the above table, the antifreezing performance and the expansion performance of the concrete prepared in the examples 1 to 3 are significantly better than those of the comparative example 1, and the toughness and the durability of the concrete prepared are improved, so that the antifreezing performance and the expansion performance are excellent.
The early strength performance of the concrete healant was tested and the results are shown in table 4:
TABLE 4
The table shows that the early strength performance of the embodiments 1 to 3 is obviously superior to that of the comparative example 1, and the strength of the concrete is rapidly improved, so that the early strength is obviously superior to that of the comparative example and the common concrete.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple changes or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.
Claims (7)
1. The anti-freezing high-temperature-resistant concrete repairing agent is characterized by comprising the following raw materials in parts by weight: 50-60 parts of acrylic acid, 10-20 parts of sodium dodecyl benzene sulfonate, 10-20 parts of propyl acetate, 40-60 parts of ethylene diamine tetraacetic acid, 500 parts of 220-sodium ion, 20-30 parts of calcium oxide, 20-30 parts of cumene hydroperoxide, 10-20 parts of sodium sulfite, 30-50 parts of sodium hydroxide, 30-40 parts of sodium hypochlorite, 20-30 parts of urea, 30-100 parts of cement and 10-30 parts of river sand.
2. The anti-freezing high-temperature-resistant concrete healant as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 55 parts of acrylic acid, 15 parts of sodium dodecyl benzene sulfonate, 15 parts of propyl acetate, 50 parts of ethylene diamine tetraacetic acid, 300 parts of water, 25 parts of calcium oxide, 25 parts of cumene hydroperoxide, 15 parts of sodium sulfite, 40 parts of sodium hydroxide, 35 parts of sodium hypochlorite, 25 parts of urea, 60 parts of cement and 20 parts of river sand.
3. The anti-freezing high-temperature-resistant concrete healant as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 50 parts of acrylic acid, 10 parts of sodium dodecyl benzene sulfonate, 10 parts of propyl acetate, 40 parts of ethylene diamine tetraacetic acid, 220 parts of water, 20 parts of calcium oxide, 20 parts of cumene hydroperoxide, 10 parts of sodium sulfite, 30 parts of sodium hydroxide, 30 parts of sodium hypochlorite, 20 parts of urea, 30 parts of cement and 10 parts of river sand.
4. The anti-freezing high-temperature-resistant concrete healant as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 60 parts of acrylic acid, 20 parts of sodium dodecyl benzene sulfonate, 20 parts of propyl acetate, 60 parts of ethylene diamine tetraacetic acid, 500 parts of water, 30 parts of calcium oxide, 30 parts of cumene hydroperoxide, 20 parts of sodium sulfite, 50 parts of sodium hydroxide, 40 parts of sodium hypochlorite, 30 parts of urea, 100 parts of cement and 30 parts of river sand.
5. The antifreeze refractory concrete healant of claim 1, wherein the cement is portland cement.
6. The antifreeze high-temperature-resistant concrete healant as claimed in claim 1, wherein the river sand has a particle size of 0.1 to 0.8 mm.
7. The preparation method of the anti-freezing high-temperature-resistant concrete healant based on claim 1 is characterized by comprising the following steps of: heating acrylic acid to 90 ℃, adding sodium dodecyl benzene sulfonate, propyl acetate and ethylenediamine tetraacetic acid, mixing uniformly, then adding water and stirring uniformly; cooling to 60-70 ℃, adding calcium oxide, cumene hydroperoxide, sodium sulfite, sodium hydroxide, sodium hypochlorite and urea, and reacting for 2-5 h; adding cement and river sand, and stirring for 5-10 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375592.5A CN113045255A (en) | 2021-04-08 | 2021-04-08 | Antifreezing high-temperature-resistant concrete repairing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375592.5A CN113045255A (en) | 2021-04-08 | 2021-04-08 | Antifreezing high-temperature-resistant concrete repairing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113045255A true CN113045255A (en) | 2021-06-29 |
Family
ID=76518911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110375592.5A Pending CN113045255A (en) | 2021-04-08 | 2021-04-08 | Antifreezing high-temperature-resistant concrete repairing agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113045255A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250043A (en) * | 2008-03-07 | 2008-08-27 | 南京航空航天大学 | Rapid mending agent for microscopic checks of airport pavement and preparation thereof |
| CN101704652A (en) * | 2009-11-19 | 2010-05-12 | 亢吉田 | Bumpy cement concrete road surface mending agent |
| CN102503285A (en) * | 2011-11-10 | 2012-06-20 | 南京工业大学 | Polymer-modified early-strengthening repair mortar and preparation method and application thereof |
| CN108793812A (en) * | 2018-06-20 | 2018-11-13 | 淮安市海洋新型建材有限公司 | A kind of anti-freezing agent for concretes |
| KR101954681B1 (en) * | 2018-03-13 | 2019-05-23 | 주식회사 리원테크 | A method of neutralizing and salt water prevention and surface anticorrosion and repairing of concrete structure |
-
2021
- 2021-04-08 CN CN202110375592.5A patent/CN113045255A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250043A (en) * | 2008-03-07 | 2008-08-27 | 南京航空航天大学 | Rapid mending agent for microscopic checks of airport pavement and preparation thereof |
| CN101704652A (en) * | 2009-11-19 | 2010-05-12 | 亢吉田 | Bumpy cement concrete road surface mending agent |
| CN102503285A (en) * | 2011-11-10 | 2012-06-20 | 南京工业大学 | Polymer-modified early-strengthening repair mortar and preparation method and application thereof |
| KR101954681B1 (en) * | 2018-03-13 | 2019-05-23 | 주식회사 리원테크 | A method of neutralizing and salt water prevention and surface anticorrosion and repairing of concrete structure |
| CN108793812A (en) * | 2018-06-20 | 2018-11-13 | 淮安市海洋新型建材有限公司 | A kind of anti-freezing agent for concretes |
Non-Patent Citations (1)
| Title |
|---|
| 蒋硕健等: "DCP(M)A、DPO(M)A的性能特点与应用", 《中国涂料》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107619224B (en) | Anti-cracking heat-preserving recycled aggregate mortar and preparation method thereof | |
| CN108675692B (en) | Fast-curing water-based epoxy concrete repair coating and preparation method thereof | |
| CN111875284B (en) | Permeable concrete reinforcing agent and preparation method and application thereof | |
| CN112159187B (en) | Environment-friendly desulfurized gypsum aerated building block and production process thereof | |
| CN110395939B (en) | Waterproof enhanced alkali-free liquid accelerator and preparation method thereof | |
| CN108191356A (en) | A kind of novel high-tenacity fiber enhancing cement-base composite material and preparation method thereof | |
| CN105271990A (en) | Composite modified mortar for air-entrained bricks | |
| CN114349440A (en) | Quick-setting, quick-hardening, early-strength and high-strength pavement patching material and preparation method thereof | |
| KR102164519B1 (en) | Latex modified ultra rapid hardening self levelling finish material composition having excellent curable property in low temperature | |
| CN112341125B (en) | Preparation method of anti-whiskering cement color decoration mortar | |
| CN110590203A (en) | Marine engineering cementing material and preparation method thereof | |
| CN112811847B (en) | Concrete admixture capable of improving workability and preparation method thereof | |
| CN113045255A (en) | Antifreezing high-temperature-resistant concrete repairing agent and preparation method thereof | |
| CN112645631A (en) | Antifreezing concrete composite water reducing agent and preparation method thereof | |
| CN108017331B (en) | High-ductility asphalt concrete | |
| CN113372071B (en) | Cement-based waterproof anti-cracking coating with high impermeability function and preparation method thereof | |
| CN108358550A (en) | A kind of environmentally protective high tenacity construction material and preparation method thereof | |
| CN114105585A (en) | High-performance concrete material and preparation method thereof | |
| CN115417617A (en) | Fiber reinforced hardener for concrete | |
| CN108409170A (en) | Rapid hardening antifreezing cement and preparation method thereof | |
| CN107141487B (en) | Preparation method of monocyclic aromatic type high-efficiency water reducing agent | |
| CN112811846A (en) | Efficient composite concrete additive | |
| CN114524655B (en) | High-strength epoxy polymer modified cement mortar and preparation method thereof | |
| CN111003971A (en) | Low-slump loss concrete and preparation method thereof | |
| CN117602911B (en) | Saline-alkali-resistant rapid repair mortar and preparation method thereof |
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: 20210629 |