CN113831602A - Flame-retardant celluloid board and preparation method thereof - Google Patents
Flame-retardant celluloid board and preparation method thereof Download PDFInfo
- Publication number
- CN113831602A CN113831602A CN202111204732.9A CN202111204732A CN113831602A CN 113831602 A CN113831602 A CN 113831602A CN 202111204732 A CN202111204732 A CN 202111204732A CN 113831602 A CN113831602 A CN 113831602A
- Authority
- CN
- China
- Prior art keywords
- parts
- retardant
- fire
- solvent
- mixture
- 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
- 239000003063 flame retardant Substances 0.000 title claims abstract description 52
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229920002160 Celluloid Polymers 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims description 6
- -1 oxygen isopropoxy aluminate Chemical class 0.000 claims abstract description 24
- 239000004966 Carbon aerogel Substances 0.000 claims abstract description 21
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 20
- 229920001220 nitrocellulos Polymers 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 3
- 239000001301 oxygen Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000003490 calendering Methods 0.000 claims description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000007983 Tris buffer Substances 0.000 claims description 2
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004132 cross linking Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 9
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/08—Cellulose derivatives
- C08J2301/16—Esters of inorganic acids
- C08J2301/18—Cellulose nitrate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0091—Complexes with metal-heteroatom-bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Fireproofing Substances (AREA)
Abstract
The invention relates to a fire-retardant celluloid board which comprises the following components in parts by weight: 65-75 parts of nitrocotton, 14-20 parts of carbon aerogel, 3-5 parts of distearoyl oxygen isopropoxy aluminate, 2-4 parts of triphenyl phosphate, 3-6 parts of a flame retardant and 60-90 parts of a solvent, wherein the carbon aerogel: distearoyl isopropoxy aluminate: triphenyl phosphate ═ 1: (4-5): (5-7). The flame retardant effect is improved through the mutual crosslinking reaction among the carbon aerogel, the distearoyl isopropoxy aluminate, the triphenyl phosphate, the flame retardant and the like. By optimizing carbon aerogels: the content of distearoyl isopropoxy aluminate and triphenyl phosphate further increases the tensile strength.
Description
Technical Field
The invention relates to the technical field of celluloid boards, in particular to a component of a flame-retardant celluloid board and a preparation method thereof.
Background
The celluloid board as a plastic product developed and used earlier by human beings has better water resistance, acid resistance and oil resistance, and is widely applied to daily life of people. However, the celluloid board has a fatal defect, and is easy to burn, so that the use of the celluloid board in large quantity has potential safety hazard. In order to overcome the flammability of the celluloid board, a flame retardant is often added to the components of the celluloid board, but the flame retardant effect of the existing flame retardant is not obvious, and other properties of the celluloid board are also affected to a certain extent. Therefore, there is a need to improve the composition of celluloid board to improve its performance.
Disclosure of Invention
Aiming at the technical problem that the flame retardant effect of the celluloid board prepared by using the conventional common flame retardant is not obvious, the invention improves the flame retardant property of the celluloid board and enhances the tensile property of the celluloid board by optimizing the component design and using the components such as carbon aerogel, distearoyl isopropoxy aluminate and triphenyl phosphate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a flame-retardant celluloid board, which comprises the following components in parts by weight: 65-75 parts of nitrocotton, 14-20 parts of carbon aerogel, 3-5 parts of distearoyl oxygen isopropoxy aluminate, 2-4 parts of triphenyl phosphate, 3-6 parts of a flame retardant and 60-90 parts of a solvent, wherein the carbon aerogel: distearoyl isopropoxy aluminate: triphenyl phosphate ═ 1: (4-5): (5-7).
Specifically, the flame-retardant celluloid board comprises 68-72 parts of nitrocotton, 16-18 parts of carbon aerogel, 3-5 parts of distearoyl isopropoxy aluminate, 2-4 parts of triphenyl phosphate, 3-5 parts of a flame retardant and 75-90 parts of a solvent.
Specifically, the flame-retardant celluloid board comprises 70 parts of nitrocotton, 16 parts of carbon aerogel, 4 parts of distearoyl oxy isopropoxy aluminate, 3 parts of triphenyl phosphate, 5 parts of a flame retardant and 80 parts of a solvent.
Specifically, the flame retardant is trihaloethyl phosphate or tri (trihalophenyl) phosphate.
Specifically, the solvent is a mixture of any two of ethanol, propanol, acetone and butanone.
A preparation method of flame-retardant celluloid board comprises the following steps:
(1) adding nitrocotton and a flame retardant into a solvent, and stirring and mixing to obtain a mixture A;
(2) mixing and stirring carbon aerogel, distearoyl isopropoxy aluminate and triphenyl phosphate in a solvent, and standing for a period of time to obtain a mixture B; reacting and crosslinking the carbon aerogel, distearoyl isopropoxy aluminate and triphenyl phosphate;
(3) stirring, mixing and standing the mixture A and the mixture B for a period of time, and performing filter pressing treatment to obtain a mixture C;
(4) plasticizing and calendering the mixture C.
Specifically, the solvent is at least one of ethanol, propanol, acetone and butanone.
Specifically, in the step (1), the weight ratio of the solvent to the nitrocotton is 0.8-1, and the weight ratio can be 0.8, 0.9 or 1.
Specifically, in the step (2) and the step (3), the standing time is 0.5-1h, and can be 0.5h, 0.7h or 1 h.
Specifically, in the step (4), the plasticizing temperature is 80-150 ℃, and can be 80 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃ or 150 ℃, and the calendering temperature is 90-110 ℃, and can be 90 ℃, 100 ℃ or 110 ℃.
The celluloid board disclosed by the invention has the advantage that the flame retardant effect is improved by adding the carbon aerogel, the distearoyl isopropoxy aluminate, the triphenyl phosphate, the flame retardant and the like through the mutual crosslinking reaction among the components. By optimizing carbon aerogels: the content of distearoyl isopropoxy aluminate and triphenyl phosphate further increases the tensile strength.
Detailed Description
The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.
Table 1: content of each component of celluloid board (parts by weight)
Among them, the flame retardants of examples 1 to 3 and comparative examples 1 to 2 were selected from trihaloethyl phosphate, and the flame retardants of examples 4 to 5 and comparative example 3 were selected from tris (trihalophenyl) phosphate.
Examples 1-5 and comparative examples 1-3 were prepared as follows:
a preparation method of flame-retardant celluloid board is characterized by comprising the following steps:
(1) adding nitrocotton and a flame retardant into a part of solvent, stirring and mixing to obtain a mixture A, wherein the weight ratio of the solvent to the nitrocotton is 0.8;
(2) mixing and stirring carbon aerogel, distearoyl isopropoxy aluminate and triphenyl phosphate in the rest part of solvent, and standing for 0.5h to obtain a mixture B;
(3) stirring, mixing and standing the mixture A and the mixture B for 0.5h, and performing filter pressing treatment to obtain a mixture C;
(4) plasticizing the mixture C at 100 ℃, calendering the mixture C at 110 ℃, and cooling the mixture C to prepare the flame-retardant celluloid board.
The fire-retardant celluloid boards prepared in examples 1-5 and comparative examples 1-3 were subjected to fire-retardant test (refer to UL94 fire-retardant test standard) and tensile strength test (GB/T1040.2-2006), and the average results of the three tests are shown in the following table:
TABLE 2 flame retardant rating and tensile strength of the flame retardant celluloid boards prepared in examples 1-5 and comparative examples 1-3
| Flame retardant rating | Tensile Strength (MPa) | |
| Example 1 | V-1 | 65.6 |
| Example 2 | V-1 | 66.2 |
| Example 3 | V-1 | 65.3 |
| Example 4 | V-2 | 67.1 |
| Example 5 | V-1 | 65.4 |
| Comparative example 1 | V-0 | 55.4 |
| Comparative example 2 | HB | 47.6 |
| Comparative example 3 | Is free of | 46.3 |
As can be seen from the test results of Table 2, the flame retardant properties and tensile strength of examples 1 to 5 are significantly superior to those of comparative examples 2 to 3.
This is because the flame retardant effect is enhanced by the mutual crosslinking reaction among the carbon aerogel, distearoyl isopropoxy aluminate, triphenyl phosphate, the flame retardant, and the like. By optimizing carbon aerogels: the content of distearoyl isopropoxy aluminate and triphenyl phosphate further increases the tensile strength.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A flame-retardant celluloid board, which is characterized by comprising the following components in parts by weight: 65-75 parts of nitrocotton, 14-20 parts of carbon aerogel, 3-5 parts of distearoyl oxygen isopropoxy aluminate, 2-4 parts of triphenyl phosphate, 3-6 parts of a flame retardant and 60-90 parts of a solvent, wherein the carbon aerogel: distearoyl isopropoxy aluminate: triphenyl phosphate ═ 1: (4-5): (5-7).
2. The fire-retardant celluloid board according to claim 1, comprising 68-72 parts of nitrocotton, 16-18 parts of carbon aerogel, 3-5 parts of distearoyl isopropoxy aluminate, 2-4 parts of triphenyl phosphate, 3-5 parts of fire retardant and 75-90 parts of solvent.
3. The fire-retardant celluloid board according to claim 1, comprising 70 parts of nitrocotton, 16 parts of carbon aerogel, 4 parts of distearoyl isopropoxy aluminate, 3 parts of triphenyl phosphate, 5 parts of fire retardant and 80 parts of solvent.
4. The fire-resistant celluloid board according to claim 1, wherein the fire retardant is trihaloethyl phosphate or tris (trihalophenyl) phosphate.
5. The fire-retardant celluloid board according to claim 1, wherein the solvent is a mixture of any two of ethanol, propanol, acetone and butanone.
6. A preparation method of flame-retardant celluloid board is characterized by comprising the following steps:
(1) adding nitrocotton and a flame retardant into a solvent, and stirring and mixing to obtain a mixture A;
(2) mixing and stirring carbon aerogel, distearoyl isopropoxy aluminate and triphenyl phosphate in a solvent, and standing for a period of time to obtain a mixture B;
(3) stirring, mixing and standing the mixture A and the mixture B for a period of time, and performing filter pressing treatment to obtain a mixture C;
(4) plasticizing and calendering the mixture C.
7. The method for preparing fire-retardant celluloid board according to claim 6, wherein the solvent is at least one of ethanol, propanol, acetone and butanone.
8. The method for preparing a fire-retardant celluloid board according to claim 6, wherein in step (1), the weight ratio of the solvent to the nitrocotton is 0.8-1.
9. The method for preparing a fire-retardant celluloid board according to claim 6, wherein the standing time in step (2) and step (3) is 0.5-1 h.
10. The method for preparing a fire-retardant celluloid board according to claim 6, wherein in the step (4), the plasticizing temperature is 80-150 ℃ and the rolling temperature is 90-110 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204732.9A CN113831602A (en) | 2021-10-15 | 2021-10-15 | Flame-retardant celluloid board and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204732.9A CN113831602A (en) | 2021-10-15 | 2021-10-15 | Flame-retardant celluloid board and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113831602A true CN113831602A (en) | 2021-12-24 |
Family
ID=78965150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111204732.9A Pending CN113831602A (en) | 2021-10-15 | 2021-10-15 | Flame-retardant celluloid board and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113831602A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764539A (en) * | 1987-11-24 | 1988-08-16 | Norton Company | Flame resistant polymers |
| CN104558691A (en) * | 2013-10-14 | 2015-04-29 | 刘新智 | Nitrocotton for flame-retardant celluloid and preparation method of nitrocotton product |
| CN106279775A (en) * | 2015-05-18 | 2017-01-04 | 刘新智 | Flame retardancy celluloid raw material, sheet material bar and the preparation method of industrial products thereof |
| CN106928908A (en) * | 2017-02-19 | 2017-07-07 | 广州市芯检康生物科技有限公司 | A kind of new aeroge multifunctional material and preparation method thereof |
| US20190352473A1 (en) * | 2018-05-17 | 2019-11-21 | Niching Industrial Corp. | Flame-retardant and abrasion-resistant composite |
| US10711070B1 (en) * | 2017-03-22 | 2020-07-14 | The United States Of America As Represented By The Secretary Of The Army | Method for preparing spherical celluloid beads |
-
2021
- 2021-10-15 CN CN202111204732.9A patent/CN113831602A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764539A (en) * | 1987-11-24 | 1988-08-16 | Norton Company | Flame resistant polymers |
| CN104558691A (en) * | 2013-10-14 | 2015-04-29 | 刘新智 | Nitrocotton for flame-retardant celluloid and preparation method of nitrocotton product |
| CN106279775A (en) * | 2015-05-18 | 2017-01-04 | 刘新智 | Flame retardancy celluloid raw material, sheet material bar and the preparation method of industrial products thereof |
| CN106928908A (en) * | 2017-02-19 | 2017-07-07 | 广州市芯检康生物科技有限公司 | A kind of new aeroge multifunctional material and preparation method thereof |
| US10711070B1 (en) * | 2017-03-22 | 2020-07-14 | The United States Of America As Represented By The Secretary Of The Army | Method for preparing spherical celluloid beads |
| US20190352473A1 (en) * | 2018-05-17 | 2019-11-21 | Niching Industrial Corp. | Flame-retardant and abrasion-resistant composite |
Non-Patent Citations (1)
| Title |
|---|
| 刘玉荣 著: "《碳材料在超级电容器中的应用》", 31 January 2013, 国防工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105440652B (en) | A kind of flame retardant thermoplastic polyurethane elastomer and preparation method thereof | |
| CN109912804B (en) | Preparation method of phosphorus-nitrogen modified lignin-based intumescent flame retardant | |
| CN112679545B (en) | Melamine-based nitrogen-phosphorus-containing compound, preparation method and application thereof, and flame-retardant epoxy resin composition thereof | |
| CN106521691A (en) | Polyester fiber with flame resistance and antibacterial properties, and applications thereof | |
| CN1962746A (en) | Expansion type flame-proof smoke-suppressing soft polyvinyl chloride composition and its preparation method | |
| CN112341804A (en) | Preparation method of flame-retardant polyamide composite material | |
| WO2023061398A1 (en) | Flame-retardant polycarbonate alloy composition, and preparation method therefor and use thereof | |
| CN104327511A (en) | Low-smoke halogen-free flame retardant composition for silicone rubber and application thereof | |
| WO2022083057A1 (en) | Halogen-free flame retardant abs composition, preparation method therefor and use thereof | |
| CN105907081A (en) | Halogen-free retardant TPU film and preparation method thereof | |
| CN111471314A (en) | Flame-retardant corrosion-resistant wood-plastic PVC modified material and preparation method thereof | |
| CN113831602A (en) | Flame-retardant celluloid board and preparation method thereof | |
| KR20100032558A (en) | Thermoplastic resin composition having superior flame retardany, coloring property and scratch-resistance | |
| CN103897770A (en) | Aircraft grade high-pressure fire-resistant oil using trixylenyl phosphate as base oil and production method thereof | |
| CN105670282A (en) | High-flame-retardancy halogen-free non-reinforced polyamide (PA) material and preparation method thereof | |
| CN106633752B (en) | Halogen-free flame-retardant PC/ABS alloy material and preparation method and application thereof | |
| CN102504447A (en) | Low-smoke low-halogen flame-retardant threading pipe material and manufacture method | |
| CN101284921B (en) | Superfine magnesium hydrate polyethylene fire retardant composite material and preparation process thereof | |
| CN106905370A (en) | A kind of hydrophobicity DOPO derivative flame retardants and preparation method thereof | |
| CN107501856B (en) | Preparation method of flame-retardant modified wood fiber composite phenolic foam | |
| CN114989756B (en) | High-temperature-resistant flame-retardant epoxy adhesive and preparation method thereof | |
| CN103509323A (en) | Highly-flowable flame-retardant PC/ASA alloy material and preparation method thereof | |
| CN104558832B (en) | A kind of anti-flaming polypropylene material containing carbon forming agent and preparation method | |
| CN113604035B (en) | Flame-retardant wear-resistant plastic particle and processing technology thereof | |
| DE2628631A1 (en) | MOLDING COMPOUNDS MADE FROM MIXTURES OF POLYFUNCTIONAL AROMATIC CYANIC ACID ESTERS AND HALOGENIC AROMATIC POLYCAR ACID ESTERS |
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 |
Application publication date: 20211224 |
|
| RJ01 | Rejection of invention patent application after publication |