CN113234405A - High-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and preparation method thereof - Google Patents
High-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and preparation method thereof Download PDFInfo
- Publication number
- CN113234405A CN113234405A CN202110648774.5A CN202110648774A CN113234405A CN 113234405 A CN113234405 A CN 113234405A CN 202110648774 A CN202110648774 A CN 202110648774A CN 113234405 A CN113234405 A CN 113234405A
- Authority
- CN
- China
- Prior art keywords
- sis
- parts
- sensitive adhesive
- melt pressure
- viscosity
- 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
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
-
- 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
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/387—Block-copolymers
Abstract
The invention relates to a high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and a preparation method thereof, wherein the high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive comprises the following components in parts by weight: 15-40 parts of SIS thermoplastic elastomer, 10-30 parts of special tackifying resin, 2-8 parts of epoxy resin and 20-80 parts of toluene, wherein the special tackifying resin is a condensate of butyl phenol and acetylene. The high sustained-viscosity SIS hot-melt pressure-sensitive adhesive is prepared by a solvent method, takes toluene as a solvent, and consists of an SIS thermoplastic elastomer, special tackifying resin and a small amount of epoxy resin. The hot melt adhesive has the advantages of good raw material compatibility, no glue leakage in a high-temperature oven environment, excellent bonding strength, stable high-temperature resistance, especially high lasting viscosity, suitability for industrial application, simple manufacture and wide application.
Description
Technical Field
The invention relates to a pressure-sensitive adhesive, in particular to a high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and a preparation method thereof.
Background
The hot melt pressure sensitive adhesive has wide application fields, including the fields of packaging products, sanitary products, adhesive labels, medical products, textile products, daily necessities, special materials and the like. The main raw materials of the hot melt adhesive are basic resin, tackifying resin and other additives, such as plasticizer, anti-aging agent, antioxidant and the like. In the base resin, a thermoplastic elastomer, particularly an SIS thermoplastic elastomer, is often used as a base material. SIS, namely styrene-isoprene-styrene segmented copolymer, is used for enhancing cohesive strength, film forming property and the like in a glue matrix. One important feature of hot melt pressure sensitive adhesives is the ability to be thermally processed to facilitate coating in the molten state, yet to rapidly solidify upon cooling to accomplish rapid bonding. The SIS midblock polyisoprene has a side chain methyl group in the structure, so that the SIS midblock polyisoprene has good cohesive force and excellent adhesive property and good compatibility with other additives, and therefore, the SIS hot melt pressure sensitive adhesive has better initial adhesive property than SBS (styrene-butadiene-styrene block copolymer) hot melt pressure sensitive adhesive.
The tackifying resin is another most important component of the pressure-sensitive adhesive besides the main elastomer, and its main function is to impart the necessary tackiness to the pressure-sensitive adhesive. Just because of the tackifying resin mixed in the rubber elastomer, the mixed system generates necessary initial adhesion and adhesive force on the surface of the bonded material, so that the bonded material becomes a real pressure-sensitive adhesive. Common tackifying resins are rosin resins, terpene resins or petroleum resins.
The finished hot-melt pressure-sensitive adhesive does not contain organic solvents generally, and is green and environment-friendly. At present, a hot melting method is generally adopted for preparing the hot-melt pressure-sensitive adhesive, and the method is solvent-free, environment-friendly and energy-saving, but has poor temperature resistance and can not meet the market demand of high permanent adhesion. Therefore, there is a need to develop a new SIS hot melt pressure sensitive adhesive with higher tack retaining performance.
Disclosure of Invention
Aiming at the technical problems, the invention provides an improved high-sustained-adhesion SIS hot-melt pressure-sensitive adhesive which has good physical property, higher sustained-adhesion property and high peel strength.
The specific technical scheme is as follows: a high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive comprises the following components in parts by weight:
15-40 parts of SIS thermoplastic elastomer
10-30 parts of special tackifying resin
2-8 parts of epoxy resin
20-80 parts of toluene
The special tackifying resin is a condensation product of butyl phenol and acetylene.
In a preferred embodiment of the invention, the butyl phenol and acetylene condensate is commercially available from KORESIN tackifying resins of BASF. The softening point of the special tackifying resin is 135-150 ℃. The condensation compound of butyl phenol and acetylene can be effectively dissolved in toluene solvent, and the tackifying resin can withstand the test of high-temperature and high-humidity environment, has short-term or long-term adhesiveness, strong adhesive capacity and small influence on the performance of rubber elastomer.
In a preferred embodiment of the present invention, the high sustained adhesion SIS hot melt pressure sensitive adhesive comprises, by weight:
20-35 parts of SIS thermoplastic elastomer
15-25 parts of special tackifying resin
3-7 parts of epoxy resin
30-65 parts of toluene.
In a more preferred embodiment of the present invention, the high sustained adhesion SIS hot melt pressure sensitive adhesive comprises, by weight:
SIS thermoplastic elastomer 25 parts
20 parts of special tackifying resin
5 parts of epoxy resin
And 50 parts of toluene.
Without being limited by theory, the hot melt pressure sensitive adhesive prepared from the star-shaped structure SIS has the characteristics of low melt viscosity, high permanent viscosity, high peel strength and high softening point. And the block ratio of the SIS is increased, the initial viscosity of the hot-melt pressure-sensitive adhesive is reduced, the permanent viscosity is increased, the melt viscosity is reduced, and the softening point is increased. As the molecular weight of the SIS increases, the initial viscosity of the hot-melt pressure-sensitive adhesive is reduced, the permanent viscosity is increased, the melt viscosity is increased, and the softening point is increased. With the decrease of the content of the diblock, the initial tack, the permanent tack and the 180 DEG peel strength of the hot melt pressure sensitive adhesive decrease.
Therefore, in a preferred embodiment of the present invention, the SIS thermoplastic elastomer is dominated by star-shaped structures and the content of linear structures is 20% or less. The block ratio S/I of the SIS thermoplastic elastomer is not less than 30/70, and the content of the diblock is not more than 5%. The SIS thermoplastic elastomer has a relative molecular mass of 10 to 20 ten thousand.
The invention also aims to provide a preparation method of the high sustained viscosity SIS hot melt pressure sensitive adhesive, which comprises the following steps:
(1) preparing materials, namely weighing the SIS thermoplastic elastomer, the special tackifying resin, the epoxy resin and the toluene in specified parts by weight;
(2) adding toluene into a reaction kettle, sequentially adding the special tackifying resin and the SIS thermoplastic elastomer under a stirring state, and uniformly stirring to obtain a material A;
(3) and pumping the material A into a preparation kettle, adding epoxy resin and other auxiliaries, uniformly stirring, and coating to obtain the high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive finished product adhesive tape.
Specifically, the other auxiliary agents include, but are not limited to: plasticizers, colorants, fillers, carbon black, silica, initiators, and the like.
In a preferred embodiment of the invention, the high sustained-viscosity SIS hot-melt pressure-sensitive adhesive is coated by a coating machine, and the coating machine is also provided with an activated carbon adsorption recovery processing device which can recover solvent toluene.
It is another object of the present invention to provide a hot melt pressure sensitive adhesive tape comprising a substrate selected from tissue paper, cloth or plastic film. More specifically, the substrate is coated with the high-tack SIS hot-melt pressure-sensitive adhesive.
The beneficial technical effects of the invention are as follows:
1. the invention adopts a solvent method to prepare the hot-melt pressure-sensitive adhesive, the viscosity of the adhesive is moderate, and the hot-melt pressure-sensitive adhesive is beneficial to coating.
2. According to the invention, the performance parameters of the SIS thermoplastic elastomer are optimized and selected, the SIS thermoplastic elastomer with a large block ratio and the tackifying resin with a high softening point are arranged in a certain parameter range, the hot melt pressure sensitive adhesive prepared by the hot melt pressure sensitive adhesive has better temperature resistance, and other physical properties are stably improved.
3. According to the invention, a small amount of epoxy resin is added into the hot-melt pressure-sensitive adhesive, so that the high-temperature adhesion maintaining performance of the hot-melt pressure-sensitive adhesive is further improved.
4. The coating machine provided by the invention is provided with the activated carbon adsorption recovery processing device, so that the solvent can be recovered and reused, the cost is reduced, and a sustainable development path is taken.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Example 1:
a high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive comprises the following components in parts by weight:
SIS thermoplastic elastomer 25 parts
20 parts of special tackifying resin
5 parts of epoxy resin
And 50 parts of toluene.
Wherein the special tackifying resin is a condensation product of butyl phenol and acetylene.
The preparation method of the high sustained-viscosity SIS hot-melt pressure-sensitive adhesive comprises the following steps:
(1) preparing materials, namely weighing the SIS thermoplastic elastomer, the special tackifying resin, the epoxy resin and the toluene in specified parts by weight;
(2) adding toluene into a reaction kettle, sequentially adding the special tackifying resin and the SIS thermoplastic elastomer under a stirring state, and uniformly stirring to obtain a material A;
(3) and pumping the material A into a preparation kettle, adding epoxy resin and other auxiliaries, uniformly stirring, and coating to obtain the high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive finished product adhesive tape.
Example 2
A high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive comprises the following components in parts by weight:
SIS thermoplastic elastomer 35 parts
30 parts of special tackifying resin
6 parts of epoxy resin
And 60 parts of toluene.
The preparation method is the same as that of example 1.
Comparative example 1:
the SIS hot-melt pressure-sensitive adhesive comprises the following components in parts by weight:
SIS thermoplastic elastomer 44.2 parts
50.5 parts of tackifying resin
And 5.3 parts of a plasticizer.
Wherein the SIS thermoplastic elastomer adopts the same structure as in example 1, the tackifying resin is terpene resin, and the softening point of the terpene resin is 100 ℃ +/-3 ℃. The SIS hot-melt pressure-sensitive adhesive in the comparative example 1 is prepared by a conventional hot-melt method.
Performance and testing:
the hot-melt pressure-sensitive adhesives prepared in example 1 and comparative example 1 were coated on a measurement substrate, respectively, at a coating weight of 40g/m2。
The test items included initial tack, peel strength (180 °), and hold tack capacity at 65 ℃. The above test methods are performed by methods commonly used in the art, and the present invention is not described in detail. The results are shown in table 1:
table 1:
from the results of table 1, it can be seen that: the initial tack performance of the hot melt method is good, but the permanent tack performance at 65 ℃ is poor. The solvent method adopts special tackifying resin and epoxy resin, effectively improves the permanent adhesive property of the hot-melt pressure-sensitive adhesive, increases the peel strength, and has little change of the initial adhesive property.
The high sustained-viscosity SIS hot-melt pressure-sensitive adhesive is prepared by a solvent method, takes toluene as a solvent, and consists of an SIS thermoplastic elastomer, special tackifying resin and a small amount of epoxy resin. The hot melt adhesive has the advantages of good raw material compatibility, no glue leakage in a high-temperature oven environment, excellent bonding strength, high lasting viscosity, stable high-temperature resistance, suitability for industrial application, simple preparation and wide application.
The above detailed description of the particularly preferred embodiments of the present invention is not intended to limit the present invention to the above embodiments. And may be modified to be implemented in various ways. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive is characterized in that: comprises the following components in parts by weight:
15-40 parts of SIS thermoplastic elastomer
10-30 parts of special tackifying resin
2-8 parts of epoxy resin
20-80 parts of toluene
The special tackifying resin is a condensation product of butyl phenol and acetylene.
2. The high sustained viscosity SIS hot melt pressure sensitive adhesive of claim 1, wherein: comprises the following components in parts by weight:
20-35 parts of SIS thermoplastic elastomer
15-25 parts of special tackifying resin
3-7 parts of epoxy resin
30-65 parts of toluene.
3. The high sustained viscosity SIS hot melt pressure sensitive adhesive of claim 1, wherein: comprises the following components in parts by weight:
SIS thermoplastic elastomer 25 parts
20 parts of special tackifying resin
5 parts of epoxy resin
And 50 parts of toluene.
4. The high sustained viscosity SIS hot melt pressure sensitive adhesive of claim 1, wherein: the SIS thermoplastic elastomer is mainly in a star structure, and the content of a linear structure is less than or equal to 20 percent.
5. The high sustained viscosity SIS hot melt pressure sensitive adhesive of claim 1, wherein: the block ratio S/I of the SIS thermoplastic elastomer is not less than 30/70, and the content of the diblock is not more than 5%.
6. The high sustained viscosity SIS hot melt pressure sensitive adhesive of claim 1, wherein: the SIS thermoplastic elastomer has a relative molecular mass of 10 to 20 ten thousand.
7. The high sustained viscosity SIS hot melt pressure sensitive adhesive of claim 1, wherein: the softening point of the special tackifying resin is 135-150 ℃.
8. The method for preparing a high sustained viscosity SIS hot melt pressure sensitive adhesive according to any one of claims 1 to 7, wherein: the preparation method of the high sustained-viscosity SIS hot-melt pressure-sensitive adhesive comprises the following steps:
(1) preparing materials, namely weighing the SIS thermoplastic elastomer, the special tackifying resin, the epoxy resin and the toluene in specified parts by weight;
(2) adding toluene into a reaction kettle, sequentially adding the special tackifying resin and the SIS thermoplastic elastomer under a stirring state, and uniformly stirring to obtain a material A;
(3) and pumping the material A into a preparation kettle, adding epoxy resin and other auxiliaries, uniformly stirring, and coating to obtain the high-sustained-viscosity SIS hot-melt pressure-sensitive adhesive finished product adhesive tape.
9. A hot-melt pressure-sensitive adhesive tape characterized by: comprises a substrate coated with the SIS hot melt pressure sensitive adhesive with high permanent viscosity of any one of claims 1 to 7 or the SIS hot melt pressure sensitive adhesive with high permanent viscosity prepared by the preparation method of claim 8.
10. A hot-melt pressure-sensitive adhesive tape according to claim 9, characterized in that: the substrate is selected from tissue paper, cloth or plastic film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110648774.5A CN113234405A (en) | 2021-06-10 | 2021-06-10 | High-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110648774.5A CN113234405A (en) | 2021-06-10 | 2021-06-10 | High-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113234405A true CN113234405A (en) | 2021-08-10 |
Family
ID=77139500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110648774.5A Pending CN113234405A (en) | 2021-06-10 | 2021-06-10 | High-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113234405A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654579A (en) * | 2004-02-13 | 2005-08-17 | 国家淀粉及化学投资控股公司 | Adhesive containing radial block copolymer |
| CN105837829A (en) * | 2016-04-06 | 2016-08-10 | 山东莱芜润达新材料有限公司 | A preparing method of low-ash-content alkylphenol-acetylene super tackifying resin |
| CN110776862A (en) * | 2019-10-30 | 2020-02-11 | 上海嘉好胶粘制品有限公司 | Special hot-melt pressure-sensitive adhesive for anti-counterfeiting adhesive tape and preparation method thereof |
| CN110819259A (en) * | 2019-11-28 | 2020-02-21 | 深圳市益达兴科技股份有限公司 | Preparation method of ultrahigh-viscosity rubber type pressure-sensitive adhesive and high-elasticity double-sided adhesive tape |
-
2021
- 2021-06-10 CN CN202110648774.5A patent/CN113234405A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654579A (en) * | 2004-02-13 | 2005-08-17 | 国家淀粉及化学投资控股公司 | Adhesive containing radial block copolymer |
| CN105837829A (en) * | 2016-04-06 | 2016-08-10 | 山东莱芜润达新材料有限公司 | A preparing method of low-ash-content alkylphenol-acetylene super tackifying resin |
| CN110776862A (en) * | 2019-10-30 | 2020-02-11 | 上海嘉好胶粘制品有限公司 | Special hot-melt pressure-sensitive adhesive for anti-counterfeiting adhesive tape and preparation method thereof |
| CN110819259A (en) * | 2019-11-28 | 2020-02-21 | 深圳市益达兴科技股份有限公司 | Preparation method of ultrahigh-viscosity rubber type pressure-sensitive adhesive and high-elasticity double-sided adhesive tape |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102181248B (en) | Hot-melt pressure-sensitive adhesive for polyethylene materials and preparation method thereof | |
| TWI453266B (en) | Heat-activable adhesive tape particularly for bonding electronic components and conductor tracks | |
| CN107163893B (en) | Hot-melt pressure-sensitive adhesive | |
| CN106318292B (en) | A kind of removable hot-fusible pressure-sensitive adhesive and preparation method | |
| CN111019575B (en) | High-temperature-resistant high-peeling-resistance hot-melt pressure-sensitive adhesive and preparation method thereof | |
| CN107189732B (en) | A kind of high durable thermoplastic polyolefin water-proof coiled material hot-fusible pressure-sensitive adhesive and preparation method thereof | |
| JP2010512428A5 (en) | ||
| JP6204633B2 (en) | Adhesive composition and adhesive sheet | |
| CN101709201A (en) | Method for preparing polystyrene-polyisoprene-polystyrene ternary segmented copolymer hot melt pressure-sensitive adhesive | |
| CN109054688B (en) | Heat aging non-sticking hot melt pressure-sensitive adhesive and preparation method thereof | |
| CN114163954A (en) | Hot-melt pressure-sensitive adhesive for RFID (radio frequency identification) electronic tag and preparation method thereof | |
| JPH10204401A (en) | Pressure sensitive adhesive composition | |
| TW201105766A (en) | Application of heat-activated adhesive tape for gluing flexible printed circuit board | |
| CN104293255A (en) | Hot melt pressure-sensitive adhesive for high adhesive strength HDPE self-adhesive coiled materials, and preparation method thereof | |
| CN111218243A (en) | Hot-melt pressure-sensitive adhesive for sticking on wet surface and preparation method and application thereof | |
| CN114456749A (en) | Hot melt adhesive for high-holding-adhesion hook and preparation method thereof | |
| KR20070086551A (en) | Adhesive strip that can be activated by heat and is based on carboxylated nitrile rubber for sticking together electronic components and strip conductors | |
| CN110819272B (en) | Adhesive composition, and adhesive film and adhesive tape comprising same | |
| CN113234405A (en) | High-sustained-viscosity SIS hot-melt pressure-sensitive adhesive and preparation method thereof | |
| KR102532705B1 (en) | Storage-stable, reactive, pressure-sensitive adhesive tape | |
| CN108707445B (en) | High performance reactive pressure sensitive adhesive compositions | |
| JP2016037524A (en) | Hot melt adhesive | |
| CN114292622A (en) | Hot-melt pressure-sensitive adhesive for house interior decoration wall sticker and preparation method thereof | |
| CN111777968A (en) | High-temperature-resistant pressure-sensitive adhesive product and preparation method thereof | |
| JP2006265508A (en) | Ultraviolet-curable hot-melt composition |
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: 20210810 |
|
| RJ01 | Rejection of invention patent application after publication |