CN113278367A - Adhesive with adjustable curing time for installation of coating-free gypsum board and preparation and application thereof - Google Patents
Adhesive with adjustable curing time for installation of coating-free gypsum board and preparation and application thereof Download PDFInfo
- Publication number
- CN113278367A CN113278367A CN202110591251.1A CN202110591251A CN113278367A CN 113278367 A CN113278367 A CN 113278367A CN 202110591251 A CN202110591251 A CN 202110591251A CN 113278367 A CN113278367 A CN 113278367A
- Authority
- CN
- China
- Prior art keywords
- adhesive
- silane coupling
- coupling agent
- gypsum board
- weight
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J1/00—Adhesives based on inorganic constituents
- C09J1/02—Adhesives based on inorganic constituents containing water-soluble alkali silicates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application provides an adhesive with adjustable curing time for installation of a coating-free gypsum board, which comprises a water glass solution, a curing agent, a lubricant, polyvinyl alcohol, a filler and a silane coupling agent. The cross-linking agent provided by the application can be used for bonding two gypsum plasterboards and can also be used for bonding the gypsum plasterboards and wood. The nail is prevented from being nailed or a buckle is installed or organic adhesive is introduced on the paper-surface gypsum board, the requirement of the paper-surface gypsum board on the nail holding force is reduced, and the pollution of organic matter volatilization to the indoor environment is avoided.
Description
Technical Field
The invention relates to but is not limited to the technical field of inorganic adhesive materials and the installation technology of gypsum plasterboards, in particular to but not limited to an inorganic adhesive with adjustable curing time for installation of a coating-free gypsum board and a preparation method thereof.
Background
The coating-free gypsum board is a board which is made of building gypsum serving as a main raw material and a small amount of fiber materials and has various patterns and decorations, secondary coating can be omitted, and the gypsum board can be installed immediately after installation. The existing installation method of the coating-free gypsum board mainly comprises a nailing method and a pasting method. The nailing method needs keels and screws for auxiliary installation, has higher requirement on the nail holding force of the plate and has certain damage effect on the plate. The pasting method is mainly installed by using bonding gypsum at present, the field is required to be mixed with water, and the setting time is relatively fixed.
Therefore, the development of an adhesive with adjustable curing time and without using mixing water is an urgent need for installation of a coating-free gypsum board.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the present application.
The application aims to develop an inorganic adhesive with adjustable curing time and without using mixing water so as to realize quick and nondestructive installation of a coating-free gypsum board.
The application provides an adhesive with adjustable curing time for installation of a coating-free gypsum board, which comprises a water glass solution, a curing agent, a lubricant, polyvinyl alcohol, a filler and a silane coupling agent.
In one embodiment provided herein, the adhesive comprises 40 to 45 parts by weight of a water glass solution, 5 to 10 parts by weight of a curing agent, 3 to 8 parts by weight of polyvinyl alcohol, 5 to 10 parts by weight of a lubricant, 30 to 35 parts by weight of a filler, and 3 to 8 parts by weight of a silane coupling agent. Optionally, the adhesive consists of the above components.
In one embodiment provided herein, the water glass solution has a modulus of 2.3 to 3.4; optionally, the water glass solution is sodium water glass or potassium water glass.
In one embodiment provided herein, the curing agent is selected from one or more of condensed aluminum phosphate and aluminum phosphate;
in one embodiment provided herein, the degree of polymerization of the polyvinyl alcohol is 1700 to 2400, and preferably, the degree of alcoholysis of the polyvinyl alcohol is 88%.
In one embodiment provided herein, the lubricant has a fineness of 300 to 400 mesh; optionally, the lubricant is one or both of bentonite or kaolin.
In one embodiment provided herein, the filler has a fineness of 300 to 400 mesh; optionally, the filler is one or more of fly ash and alumina.
In one embodiment provided herein, the silane coupling agent is selected from one or more of a vinyl silane coupling agent, an amino silane coupling agent, an epoxy silane coupling agent, a methacryloxy silane coupling agent, a mercapto silane coupling agent, and a ureido silane coupling agent.
In another aspect, the present application provides a preparation method of the adhesive, including the following steps: and uniformly mixing the water glass solution and the silane coupling agent, adding a lubricant and a filler, continuously and uniformly mixing, and finally adding a curing agent and polyvinyl alcohol, and uniformly stirring to obtain the adhesive.
In another aspect, the application provides the adhesive for bonding the paper-surface gypsum board and the floor slab.
In one embodiment provided by the application, the adhesive is also used for bonding a paper-surface gypsum board and a paper-surface gypsum board, a paper-surface gypsum board and cement, and a paper-surface gypsum board and wood.
The application has the advantages that:
the adhesive curing time of the preparation is adjustable, and the adhesive can be stirred with water, so that the adhesive is suitable for installation of a coating-free gypsum board, and the convenience in board installation can be greatly improved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the invention in its aspects as described in the specification.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application are described in detail below. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The embodiment of the application provides an adhesive with adjustable curing time for installation of a coating-free gypsum board, and the adhesive comprises a water glass solution, a curing agent, a lubricant, polyvinyl alcohol, a filler and a silane coupling agent.
In the embodiment of the application, the adhesive comprises 40 to 45 parts by weight of water glass solution, 5 to 10 parts by weight of curing agent, 3 to 8 parts by weight of polyvinyl alcohol, 5 to 10 parts by weight of lubricant, 30 to 35 parts by weight of filler and 3 to 8 parts by weight of silane coupling agent. Optionally, the adhesive consists of the above components.
In the examples of the present application, the water glass solution has a modulus of 2.3 to 3.4; optionally, the water glass solution is sodium water glass or potassium water glass.
In the examples herein, the curing agent is selected from one or more of condensed aluminum phosphate and aluminum phosphate;
in the present embodiment, the polymerization degree of the polyvinyl alcohol is 1700 to 2400, and preferably, the alcoholysis degree of the polyvinyl alcohol is 88%.
In the embodiment of the application, the fineness of the lubricant is 300 to 400 meshes; optionally, the lubricant is one or both of bentonite or kaolin.
In the embodiment of the application, the fineness of the filler is 300 to 400 meshes; optionally, the filler is one or more of fly ash and alumina.
In the embodiments herein, the silane coupling agent is selected from one or more of a vinyl silane coupling agent, an amino silane coupling agent, an epoxy silane coupling agent, a methacryloxy silane coupling agent, a mercapto silane coupling agent, and a ureido silane coupling agent.
Example 1
The embodiment provides an adhesive for mounting a gypsum plasterboard and a preparation method thereof.
The application is gluing agent for mounting of paper-surface gypsum board, which comprises the following components:
base material: 40 parts by weight of curing agent: 10 parts by weight of a lubricant: 10 parts by weight of filler: 35 parts by weight, silane coupling agent: 5 parts by weight, polyvinyl alcohol: 8 parts by weight.
Wherein the base material is sodium silicate aqueous solution, the mark is SSL3340, the modulus is 3.2-3.4, and the base material is purchased from Qingdao gulf chemical Co. The curing agent is condensed aluminum phosphate, and is purchased from Wuhan Huazhi scientific & Biotech limited company. The lubricant is bentonite with the fineness of 300 meshes and is purchased from Hebei Hemiguang mineral products Co. The filler is double-flying powder with the fineness of 400 meshes and is purchased from Xin flourishing mineral products Co. The silane coupling agent is of a grade KH560 and is purchased from Shandong Leeon New Material Co. The polyvinyl alcohol has the polymerization degree of 1700 and the alcoholysis degree of 88 percent, and is purchased from Longhu science and technology Limited.
The preparation method of the adhesive provided by the application comprises the following steps: after uniformly mixing the base material and the silane coupling agent, adding the lubricant and the filler, continuously and uniformly mixing, and finally adding the curing agent and the polyvinyl alcohol, and uniformly stirring to prepare the adhesive for mounting the gypsum board.
Example 2
The embodiment provides an adhesive for mounting a gypsum plasterboard and a preparation method thereof.
The application is gluing agent for mounting of paper-surface gypsum board, which comprises the following components:
base material: 42 parts by weight of curing agent: 8 parts by weight of lubricant: 6 parts by weight of filler: 33 parts by weight, silane coupling agent: 4 parts by weight, polyvinyl alcohol: 5 parts by weight.
Wherein the matrix material is sodium silicate aqueous solution, the mark is SSL2451, the modulus is 2.3-2.5, and the matrix material is purchased from Qingdao gulf chemical Co. The curing agent is condensed aluminum phosphate, and is purchased from Wuhan Huazhi scientific & Biotech limited company. The lubricant is bentonite with the fineness of 300 meshes and is purchased from Hebei Hemiguang mineral products Co. The filler is double-flying powder with the fineness of 400 meshes and is purchased from Xin flourishing mineral products Co. The silane coupling agent is of a grade KH560 and is purchased from Shandong Leeon New Material Co. The polymerization degree of the polyvinyl alcohol is 2400, and the alcoholysis degree is 88%.
The preparation method of the adhesive provided by the application comprises the following steps: after uniformly mixing the base material and the silane coupling agent, adding the lubricant and the filler, continuously and uniformly mixing, and finally adding the curing agent and the polyvinyl alcohol, and uniformly stirring to prepare the adhesive for mounting the gypsum board.
Example 3
The embodiment provides an adhesive for mounting a gypsum plasterboard and a preparation method thereof.
The application is gluing agent for mounting of paper-surface gypsum board, which comprises the following components:
base material: 45 parts by weight of curing agent: 6 parts by weight of lubricant: 10 parts by weight of filler: 30 parts by weight of a silane coupling agent: 4 parts by weight, polyvinyl alcohol: 3 parts by weight.
Wherein the matrix material is sodium silicate aqueous solution, the mark is SSL2451, the modulus is 2.3-2.5, and the matrix material is purchased from Qingdao gulf chemical Co. The curing agent is condensed aluminum phosphate, and is purchased from Wuhan Huazhi scientific & Biotech limited company. The lubricant is bentonite with the fineness of 400 meshes and is purchased from Hebei Hemiguang mineral products Co. The filler is double-flying powder with the fineness of 300 meshes and is purchased from Xin flourishing mineral products Co. The silane coupling agent is of a grade KH560 and is purchased from Shandong Leeon New Material Co. The polymerization degree of the polyvinyl alcohol is 1700, and the alcoholysis degree is 88%.
The preparation method of the adhesive provided by the application comprises the following steps: after uniformly mixing the base material and the silane coupling agent, adding the lubricant and the filler, continuously and uniformly mixing, and finally adding the curing agent and the polyvinyl alcohol, and uniformly stirring to prepare the adhesive for mounting the gypsum board.
Comparative example 1
The comparative example is an organic adhesive purchased on the market, and the brand is rabbit bass nail-free adhesive.
Performance testing
The adhesive for mounting the gypsum plasterboard prepared in the above examples and comparative examples were subjected to curing time, pull strength, and tensile shear strength tests (the curing time and pull strength test standard was JC/T1025-2007, and the shear strength test standard was GB/T7124-2008), and the results are shown in Table 1.
Table 1 adhesive test results
| Curing time | Drawing strength | Tensile shear strength | |
| Example 1 | 24′ | 1.3MPa | 810N |
| Example 2 | 45′ | 1.5MPa | 986N |
| Example 3 | 1h | 1.5MPa | 735N |
| Comparative example 1 | 24h | 1.4MPa | 798N |
The test results show that the adhesive prepared by the method is suitable and adjustable in curing time, high in strength, low in requirement on construction environment temperature and capable of being used at low temperature, and can be used for mounting gypsum board partition walls.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (10)
1. An adhesive with adjustable curing time for installation of a coating-free gypsum board comprises a water glass solution, a curing agent, a lubricant, polyvinyl alcohol, a filler and a silane coupling agent.
2. The adhesive of claim 1, comprising 40 to 45 parts by weight of water glass solution, 5 to 10 parts by weight of curing agent, 3 to 8 parts by weight of polyvinyl alcohol, 5 to 10 parts by weight of lubricant, 30 to 35 parts by weight of filler, 3 to 8 parts by weight of silane coupling agent.
3. The adhesive of claim 1 wherein the water glass solution has a modulus of 2.3 to 3.4; optionally, the water glass solution is sodium water glass or potassium water glass.
4. The adhesive of claim 1, wherein the curing agent is selected from one or more of condensed aluminum phosphate and aluminum phosphate;
optionally, the degree of polymerization of the polyvinyl alcohol is 1700 to 2400, and preferably, the degree of alcoholysis of the polyvinyl alcohol is 88%.
5. The adhesive according to any one of claims 1 to 4, wherein the fineness of the lubricant is 300 to 400 meshes; optionally, the lubricant is one or both of bentonite or kaolin.
6. The adhesive according to any one of claims 1 to 4, wherein the fineness of the filler is 300 to 400 meshes; optionally, the filler is one or more of fly ash and alumina.
7. The adhesive of any of claims 1-4 wherein the silane coupling agent is selected from one or more of a vinyl silane coupling agent, an amino silane coupling agent, an epoxy silane coupling agent, a methacryloxy silane coupling agent, a mercapto silane coupling agent, and a ureido silane coupling agent.
8. Process for the preparation of the adhesive according to any one of claims 1 to 7, comprising the following steps: and uniformly mixing the water glass solution and the silane coupling agent, adding a lubricant and a filler, continuously and uniformly mixing, and finally adding a curing agent and polyvinyl alcohol, and uniformly stirring to obtain the adhesive.
9. The adhesive according to any one of claims 1 to 7 is used for bonding paper-faced gypsum boards and floor slabs.
10. The use of claim 9, wherein the adhesive is also used for bonding paper-faced gypsum board to paper-faced gypsum board, paper-faced gypsum board to cement, paper-faced gypsum board to wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110591251.1A CN113278367A (en) | 2021-05-28 | 2021-05-28 | Adhesive with adjustable curing time for installation of coating-free gypsum board and preparation and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110591251.1A CN113278367A (en) | 2021-05-28 | 2021-05-28 | Adhesive with adjustable curing time for installation of coating-free gypsum board and preparation and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113278367A true CN113278367A (en) | 2021-08-20 |
Family
ID=77282306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110591251.1A Pending CN113278367A (en) | 2021-05-28 | 2021-05-28 | Adhesive with adjustable curing time for installation of coating-free gypsum board and preparation and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113278367A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147843A (en) * | 1994-04-13 | 1997-04-16 | 杰里夫·克朗普顿 | Lightweight insulating panels |
| KR20090016809A (en) * | 2007-08-13 | 2009-02-18 | (주)새론화인켐 | Process for preparing flame retardant one component inorganic adhesive and one component inorganic adhesive prepared thereby |
| CN101724352A (en) * | 2009-12-11 | 2010-06-09 | 北京工业大学 | Inorganic adhesive for artificial board and preparation method thereof |
| CN102863906A (en) * | 2012-10-17 | 2013-01-09 | 中南林业科技大学 | Low-cost environment-friendly water glass wood adhesive and preparation method thereof |
| CN104031564A (en) * | 2014-06-13 | 2014-09-10 | 连云港保丽森实业有限公司 | Fireproof environment-friendly inorganic adhesive as well as preparation method and preparation system thereof |
| CN109370447A (en) * | 2018-08-15 | 2019-02-22 | 芜湖横路新材料科技有限公司 | A kind of triple wall board PVA adhesive and preparation method thereof |
| CN112063309A (en) * | 2020-09-01 | 2020-12-11 | 杭州汇杰新材料有限公司 | Single-component high-temperature fireproof inorganic adhesive for sealing and repairing high-temperature equipment |
-
2021
- 2021-05-28 CN CN202110591251.1A patent/CN113278367A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147843A (en) * | 1994-04-13 | 1997-04-16 | 杰里夫·克朗普顿 | Lightweight insulating panels |
| KR20090016809A (en) * | 2007-08-13 | 2009-02-18 | (주)새론화인켐 | Process for preparing flame retardant one component inorganic adhesive and one component inorganic adhesive prepared thereby |
| CN101724352A (en) * | 2009-12-11 | 2010-06-09 | 北京工业大学 | Inorganic adhesive for artificial board and preparation method thereof |
| CN102863906A (en) * | 2012-10-17 | 2013-01-09 | 中南林业科技大学 | Low-cost environment-friendly water glass wood adhesive and preparation method thereof |
| CN104031564A (en) * | 2014-06-13 | 2014-09-10 | 连云港保丽森实业有限公司 | Fireproof environment-friendly inorganic adhesive as well as preparation method and preparation system thereof |
| CN109370447A (en) * | 2018-08-15 | 2019-02-22 | 芜湖横路新材料科技有限公司 | A kind of triple wall board PVA adhesive and preparation method thereof |
| CN112063309A (en) * | 2020-09-01 | 2020-12-11 | 杭州汇杰新材料有限公司 | Single-component high-temperature fireproof inorganic adhesive for sealing and repairing high-temperature equipment |
Non-Patent Citations (1)
| Title |
|---|
| 李铭臻主编: "《新编建筑工程材料》", 31 January 1998, 中国建材工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6783587B2 (en) | Lightweight wallboard compositions containing natural polymers | |
| US20190338516A1 (en) | Methods for making high sound transmission class gypsum boards and gypsum boards made by the method | |
| CN112679177A (en) | Paper-surface gypsum board and preparation method thereof | |
| JP2022531647A (en) | Mortar composition for acoustic attenuation and fire protection | |
| US10941076B2 (en) | Use of sacrificial agents in manufacture of gypsum wallboard | |
| CN110606769B (en) | Light high-strength gypsum composite material with electromagnetic shielding and absorption effects | |
| CN107032729A (en) | A kind of lightweight leveling dry powder and mortar | |
| CN113292931A (en) | Adhesive and preparation and application thereof | |
| CN111606674A (en) | High-sound-insulation paper-surface gypsum board and preparation method thereof | |
| CN112225519A (en) | Method for improving strength of gypsum building material product | |
| CN109776057A (en) | A kind of foamed heat insulating plate material and preparation method thereof for upright mould process production | |
| US20230357078A1 (en) | Cement Board with Water-Resistant Additive | |
| CN113493340A (en) | Magnesium phosphate-based foam concrete heat-insulating material | |
| KR101820726B1 (en) | Chemical additive for gypsum products | |
| CN102503277B (en) | Building material and preparation method thereof | |
| CN113278367A (en) | Adhesive with adjustable curing time for installation of coating-free gypsum board and preparation and application thereof | |
| CN112388801A (en) | Composite slurry composition, composite slurry and composite sandwich panel | |
| JP2001122651A (en) | Surface preparation material composition for concrete structure and method for manufacture thereof | |
| CN110981362B (en) | Plastering mortar and application thereof | |
| KR101644008B1 (en) | Geopolymer modified with hydrophobic polymer and high performance hybrid finish materials for construction using the same | |
| CN113773035A (en) | ALC light partition board and preparation method thereof | |
| CN106760149B (en) | Assembled magnesium-based cement foamed lightweight board and preparation method thereof | |
| CN116535180B (en) | Fiber reinforced mortar and preparation method thereof | |
| JPH11157909A (en) | Interior finishing material composition | |
| CN114804695B (en) | Mildew-proof and strength-keeping gypsum retarder and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210819 Address after: Room 1601, block a, Beixin center, No. 9, Qibei Road, South District, future science city, Changping District, Beijing Applicant after: BEIJING NEW BUILDING MATERIALS PLC Applicant after: CHINA NATIONAL BUILDING MATERIALS TECHNOLOGICAL INNOVATION & RESEARCH INSTITUTE Ltd. Address before: No.9, Qibei Road, future science city, Changping District, Beijing, 102209 Applicant before: CHINA NATIONAL BUILDING MATERIALS TECHNOLOGICAL INNOVATION & RESEARCH INSTITUTE Ltd. |
|
| 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: 20210820 |