WO2023190981A1 - 樹脂複合材用ガラス製品 - Google Patents
樹脂複合材用ガラス製品 Download PDFInfo
- Publication number
- WO2023190981A1 WO2023190981A1 PCT/JP2023/013382 JP2023013382W WO2023190981A1 WO 2023190981 A1 WO2023190981 A1 WO 2023190981A1 JP 2023013382 W JP2023013382 W JP 2023013382W WO 2023190981 A1 WO2023190981 A1 WO 2023190981A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- glass
- less
- product according
- glass product
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
- C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/40—Glass
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
Definitions
- the present invention relates to glass products suitable for use in resin composites, and more specifically to glass products having glass fibers or other shapes suitable for use in resin composites.
- the present invention is a glass product for resin composite material, Displayed in mass%, 55 ⁇ SiO 2 ⁇ 70, 0 ⁇ B 2 O 3 ⁇ 2, 5 ⁇ Al 2 O 3 ⁇ 15, 47 ⁇ (SiO 2 -Al 2 O 3 ) ⁇ 60, 0.1 ⁇ MgO ⁇ 10, 10 ⁇ CaO ⁇ 30, 0 ⁇ ZnO ⁇ 2, 0 ⁇ ( Li2O + Na2O + K2O ) ⁇ 4,
- a glass product comprising a glass composition containing the following components is provided.
- a new glass product is provided that is suitable for use in resin composite materials and suitable for mass production.
- not substantially containing and not substantially containing mean that the content is less than 0.1% by mass, less than 0.05% by mass, less than 0.01% by mass, and even 0. This means less than 0.005% by weight, in particular less than 0.003% by weight, and in some cases less than 0.001% by weight.
- substantially means that the inclusion of trace amounts of impurities originating from glass raw materials, manufacturing equipment, molding equipment, etc. is allowed.
- Mainn component means a component having the highest content on a mass basis.
- T-Fe 2 O 3 means total iron oxide converted to diiron trioxide (Fe 2 O 3 ).
- Alkali metal oxide means lithium oxide (Li 2 O), sodium oxide (Na 2 O) and potassium oxide (K 2 O). The upper and lower limits of the content described below can be arbitrarily combined.
- the glass composition is suitable for reinforcing resin composite materials while limiting the contents of diboron trioxide (B 2 O 3 ), zinc oxide (ZnO), and alkali metal oxides in the glass composition. Fibers and other glass products can be obtained. B 2 O 3 easily scatters when glass raw materials are melted, and corrodes the walls of the melting furnace and the heat storage furnace. Therefore, a high content of B 2 O 3 can affect the life of the manufacturing equipment. A high content of ZnO causes an increase in raw material cost. Glass compositions with limited content of these components can be suitable for mass production. Furthermore, a high content of alkali metal oxides can be a factor in lowering the Young's modulus of glass products. Glass compositions with limited alkali metal oxide content can have properties suitable for reinforcing resin composites. Below, first, details of the glass composition that constitutes the glass product will be explained.
- Glass composition A An example of a glass composition (hereinafter referred to as glass composition A) is expressed in mass%, 55 ⁇ SiO 2 ⁇ 70, 0 ⁇ B 2 O 3 ⁇ 2, 5 ⁇ Al 2 O 3 ⁇ 15, 47 ⁇ (SiO 2 -Al 2 O 3 ) ⁇ 60, 0.1 ⁇ MgO ⁇ 10, 10 ⁇ CaO ⁇ 30, 0 ⁇ ZnO ⁇ 2, 0 ⁇ ( Li2O + Na2O + K2O ) ⁇ 4, Contains the following ingredients.
- Glass composition A may be a composition substantially free of BaO and F 2 .
- Glass composition A may contain components such that 55 ⁇ SiO 2 ⁇ 67 expressed in mass %.
- Glass composition A may contain components such that 55 ⁇ SiO 2 ⁇ 65 expressed in mass %.
- Glass composition A may contain components such that 8 ⁇ Al 2 O 3 ⁇ 15 expressed in mass %.
- Glass composition A may contain components such that 47 ⁇ (SiO 2 ⁇ Al 2 O 3 ) ⁇ 57 expressed in mass %.
- Glass composition A may contain components such that 1 ⁇ MgO ⁇ 5 expressed in mass %.
- Glass composition A may contain components such that 15 ⁇ CaO ⁇ 30, expressed in mass %.
- Glass composition A may contain components such that 0 ⁇ (Li 2 O+Na 2 O+K 2 O) ⁇ 2, expressed in mass %. Glass composition A may contain components such that 0 ⁇ TiO 2 ⁇ 5 expressed in mass %. Glass composition A may contain components such that 0 ⁇ ZrO 2 ⁇ 1, expressed in mass %. Glass composition A may contain components such that 0 ⁇ ZrO 2 ⁇ 0.5 expressed in mass %. Glass composition A may contain components such that 0 ⁇ T-Fe 2 O 3 ⁇ 5 expressed in mass %. Glass composition A may contain components such that 0 ⁇ T-Fe 2 O 3 ⁇ 0.5 expressed in mass %. Glass composition A may contain components such that 0 ⁇ T-Fe 2 O 3 ⁇ 0.1 expressed in mass %.
- Glass composition A does not need to contain substantially ZnO.
- Glass composition A may be substantially free of TiO 2 .
- Glass composition A may be substantially free of B 2 O 3 .
- Glass composition A does not need to contain substantially SrO.
- Glass composition A may be substantially free of ZrO 2 .
- the content of silicon dioxide (SiO 2 ) in glass composition A may be 55% by mass or more and 69% by mass or less.
- the content of aluminum oxide (Al 2 O 3 ) may be 5% by mass or more and 14% by mass or less.
- (SiO 2 -Al 2 O 3 ) may be 47% by mass or more and 57% by mass or less.
- the content of magnesium oxide (MgO) may be 0.1% by mass or more and 8% by mass or less.
- the content of calcium oxide (CaO) may be 10% by mass or more and 28% by mass or less.
- the content of diboron trioxide (B 2 O 3 ) may be 0.1% by mass or more and less than 2% by mass.
- composition A (Specific example of glass composition A) Below, as more specific glass composition A, composition A-1 and composition A-2 are illustrated.
- the glass composition having the glass composition A-1 has excellent heat resistance, suppresses deformation when heated to high temperatures, and has excellent chemical durability, particularly acid resistance.
- SiO2 is a component that forms the skeleton of glass and is the main component of composition A-1. Further, SiO 2 is a component that adjusts the devitrification temperature and viscosity during glass formation, and is a component that improves acid resistance.
- the content of SiO 2 is 55% by mass or more and 67% by mass or less, but the lower limit of the content of SiO 2 can be 56% by mass or more, 57% by mass or more, 58% by mass or more, 59% by mass or more. and may be greater than 60% by mass.
- the upper limit of the content of SiO 2 may be 65% by mass or less, 64% by mass or less, and further 63% by mass or less.
- B 2 O 3 is a component that forms the skeleton of glass. Moreover, B 2 O 3 is also a component that adjusts the devitrification temperature and viscosity during glass formation.
- the lower limit of the content of B 2 O 3 may be 0.1% by mass or more.
- the upper limit of the content of B 2 O 3 may be less than 2% by mass, 1.5% by mass or less, 1% by mass or less, or 0.5% by mass or less.
- the upper limit of the content of B 2 O 3 may be 0.1% by mass or less.
- Composition A-1 may be substantially free of B 2 O 3 .
- the lower limit of the content of Al 2 O 3 may be 6% by mass or more, 7% by mass or more, 8% by mass or more, 8.5% by mass or more, 9% by mass or more, 9.5% by mass or more, 10% by mass % or more, 10.5% by mass or more, 11% by mass or more, and even 11.1% by mass or more.
- the upper limit of the content of Al 2 O 3 may be 14% by mass or less, 13% by mass or less, 12.5% by mass or less, less than 12% by mass, or even 11.9% by mass or less.
- the lower limit of the value obtained by subtracting the Al 2 O 3 content from the SiO 2 content (SiO 2 -Al 2 O 3 ) is 47% by mass or more, more than 48% by mass, The content may be 48.5% by mass or more, more than 49% by mass, or even 49.5% by mass or more.
- the upper limit of (SiO 2 -Al 2 O 3 ) may be 57% by mass or less, 56% by mass or less, 55% by mass or less, 54% by mass or less, 53% by mass or less, and even 52% by mass or less. It's possible.
- MgO, CaO are components that adjust the devitrification temperature and viscosity during glass formation. Moreover, MgO and CaO are also components that improve Young's modulus.
- the content of MgO is 0.1% by mass or more and 10% by mass or less, but the lower limit can be 0.5% by mass or more, 1% by mass or more, 1.5% by mass or more, and even 2% by mass. It can be more than that.
- the upper limit of the content of MgO may be 8% by mass or less, 6% by mass or less, 5% by mass or less, 4.5% by mass or less, or even 4% by mass or less.
- the upper limit of (MgO+CaO) is preferably 40% by mass or less, 35% by mass or less, 32% by mass or less, 30% by mass or less, 29% by mass or less, 28% by mass or less, 27% by mass or less, 26% by mass or less It can be.
- the value of the sum of the contents of MgO, CaO, SrO, and BaO can affect the meltability and moldability of glass.
- the lower limit of (MgO+CaO+SrO+BaO) is preferably 15% by mass or more, 18% by mass or more, 20% by mass or more, 21% by mass or more, 22% by mass or more. , 23% by mass or more, 24% by mass or more, 25% by mass or more, 26% by mass or more, 27% by mass or more, and 28% by mass or more.
- the lower limit of the content of sodium oxide (Na 2 O) may be 0.1% by mass or more, or 0.2% by mass or more.
- the upper limit of the content of Na 2 O may be 4% by mass or less, 3% by mass or less, 2% by mass or less, 1.5% by mass or less, or even 1% by mass or less.
- Composition A-1 may further contain zirconium oxide (ZrO 2 ).
- ZrO 2 is a component that adjusts the devitrification temperature and viscosity during glass formation. Furthermore, ZrO 2 is a component that improves the acid resistance and alkali resistance of glass. However, since the raw material for ZrO 2 is relatively expensive, the content thereof should be low. The upper limit of the content of ZrO 2 can be 7% by mass or less, 6% by mass or less, 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, 1% by mass or less, 1% by mass. It may be less than 0.5% by weight, or even less than 0.1% by weight.
- Composition A-1 may be substantially free of ZrO 2 .
- Composition A-1 may further contain iron oxide.
- Iron (Fe) usually exists in the Fe 2+ or Fe 3+ state.
- Fe 3+ is a component that enhances the ultraviolet absorption properties of glass
- Fe 2+ is a component that enhances heat ray absorption properties of glass. Even if Fe is not intentionally included, it may be unavoidably mixed in with industrial raw materials. If the content of Fe is small, coloring of the glass can be prevented.
- composition containing the following ingredients 55 ⁇ SiO 2 ⁇ 65, 0 ⁇ B 2 O 3 ⁇ 2, 5 ⁇ Al 2 O 3 ⁇ 15, 47 ⁇ (SiO 2 ⁇ Al 2 O 3 ) ⁇ 57, 0.1 ⁇ MgO ⁇ 5, 10 ⁇ CaO ⁇ 30, 0.1 ⁇ SrO ⁇ 15, 0 ⁇ ZnO ⁇ 2, 0 ⁇ ( Li2O + Na2O + K2O ) ⁇ 4, 0 ⁇ T-Fe 2 O 3 ⁇ 5, A composition containing the following ingredients.
- Composition A-2 contains the following components in mass %. 65 ⁇ SiO2 ⁇ 75, 0 ⁇ B 2 O 3 ⁇ 2, 5 ⁇ Al 2 O 3 ⁇ 15, 50 ⁇ (SiO 2 -Al 2 O 3 ) ⁇ 60, 1 ⁇ MgO ⁇ 10, 10 ⁇ CaO ⁇ 25, 0 ⁇ ZnO ⁇ 2, 0 ⁇ ( Li2O + Na2O + K2O ) ⁇ 4, 0 ⁇ T-Fe 2 O 3 ⁇ 5,
- the lower limit of the value obtained by subtracting the Al 2 O 3 content from the SiO 2 content (SiO 2 -Al 2 O 3 ) is more than 50% by mass. It can be 51% by mass or more, 52% by mass or more, or even more than 53% by mass. Further, the upper limit of (SiO 2 -Al 2 O 3 ) may be 60% by mass or less, 59% by mass or less, 58% by mass or less, and even 57% by mass or less.
- the MgO content is 1% by mass or more and 10% by mass or less.
- the lower limit of the content of MgO may be 1.5% by mass or more, and even 2% by mass or more.
- the upper limit of the content of MgO may be 8% by mass or less, 6% by mass or less, 5% by mass or less, 4.5% by mass or less, or even 4% by mass or less.
- composition A-2 the total content of alkali metal oxides (Li 2 O+Na 2 O+K 2 O) is 0% by mass or more and 4% by mass or less.
- the lower limit of (Li 2 O+Na 2 O+K 2 O) may be 0.1% by mass or more, 1% by mass or more, 1.5% by mass or more, or even 2% by mass or more.
- the upper limit of (Li 2 O+Na 2 O+K 2 O) may be 3.5% by mass or less, or 3% by mass or less.
- Composition A-2 may be substantially free of alkali metal oxides.
- Each of Li 2 O, Na 2 O, and K 2 O is an optional component. In other words, the lower limit of the content of each of these components may be zero.
- composition A-2 Li 2 O makes a particularly high contribution to the effect based on the alkali metal oxide described above.
- the lower limit of the content of Li 2 O in composition A-2 may be 0.1% by mass or more, 0.5% by mass or more, or even 1% by mass or more.
- the upper limit of the content of Li 2 O may be 4% by mass or less, 3% by mass or less, 2.5% by mass or less, or 2% by mass or less.
- the resin composite material of this embodiment includes a reinforcing material such as the glass fiber described above. That is, the resin composite material of this embodiment is reinforced with a reinforcing material.
- the resin composite may be, for example, glass fiber reinforced plastic (GFRP) or long glass fiber mat reinforced thermoplastic (GMT).
- the resin contained in the resin composite may be, but is not limited to, polyester resin, vinyl ester resin, epoxy resin, phenol resin, etc.
- the resin composite material may contain additives other than the resin and the reinforcing material.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Textile Engineering (AREA)
- Glass Compositions (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024512851A JPWO2023190981A1 (https=) | 2022-03-30 | 2023-03-30 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-057490 | 2022-03-30 | ||
| JP2022057490 | 2022-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023190981A1 true WO2023190981A1 (ja) | 2023-10-05 |
Family
ID=88202169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/013382 Ceased WO2023190981A1 (ja) | 2022-03-30 | 2023-03-30 | 樹脂複合材用ガラス製品 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2023190981A1 (https=) |
| TW (1) | TW202402697A (https=) |
| WO (1) | WO2023190981A1 (https=) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007529401A (ja) * | 2004-03-17 | 2007-10-25 | サン−ゴバン ベトロテックス フランス ソシエテ アノニム | 有機及び/又は無機材料を強化することができるガラスストランド |
| WO2007148758A1 (ja) * | 2006-06-23 | 2007-12-27 | Nippon Sheet Glass Company, Limited | 鱗片状ガラス |
| US20190055156A1 (en) * | 2017-08-17 | 2019-02-21 | Ocv Intellectual Capital, Llc | Brucite as a source of magnesium oxide in glass compositions |
-
2023
- 2023-03-30 TW TW112112371A patent/TW202402697A/zh unknown
- 2023-03-30 JP JP2024512851A patent/JPWO2023190981A1/ja active Pending
- 2023-03-30 WO PCT/JP2023/013382 patent/WO2023190981A1/ja not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007529401A (ja) * | 2004-03-17 | 2007-10-25 | サン−ゴバン ベトロテックス フランス ソシエテ アノニム | 有機及び/又は無機材料を強化することができるガラスストランド |
| WO2007148758A1 (ja) * | 2006-06-23 | 2007-12-27 | Nippon Sheet Glass Company, Limited | 鱗片状ガラス |
| US20190055156A1 (en) * | 2017-08-17 | 2019-02-21 | Ocv Intellectual Capital, Llc | Brucite as a source of magnesium oxide in glass compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202402697A (zh) | 2024-01-16 |
| JPWO2023190981A1 (https=) | 2023-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101931391B1 (ko) | 고 굴절율 유리 조성물 | |
| JP5432711B2 (ja) | ガラス組成物 | |
| WO2020230550A1 (ja) | ガラス繊維用ガラス組成物 | |
| JPWO2008156091A1 (ja) | ガラス組成物 | |
| JP2012051773A (ja) | 樹脂複合体基板用ガラス | |
| JP2024007454A (ja) | ガラス組成物 | |
| CN113060938A (zh) | 玻璃组合物、玻璃纤维和形成方法及增强的复合制品 | |
| JP2013121905A (ja) | 樹脂複合体基板用ガラス | |
| JP5810086B2 (ja) | ガラスフィラー | |
| JP2012153582A (ja) | ガラス組成物及びその用途 | |
| JP5809900B2 (ja) | ガラス組成物、並びにこれを用いたポリカーボネート樹脂用ガラスフィラー及びポリカーボネート樹脂組成物 | |
| WO2023190981A1 (ja) | 樹脂複合材用ガラス製品 | |
| JP5964219B2 (ja) | ガラスフィラー | |
| WO2023190982A1 (ja) | ガラス繊維 | |
| JP5365265B2 (ja) | ガラス繊維及びそれを用いたポリカーボネート樹脂成形体 | |
| JP2011162415A (ja) | ガラス組成物及びその用途 | |
| JP2013159546A (ja) | ガラスフィラー | |
| WO2011125316A1 (ja) | ガラスフィラー | |
| WO2024105894A1 (ja) | ガラス繊維およびガラス繊維用組成物 | |
| JP7817489B1 (ja) | ガラス組成物、ガラス繊維、及びガラスフィラー | |
| JP7659709B1 (ja) | ガラス組成物、ガラス繊維、及びガラスフィラー | |
| JPH06157072A (ja) | 耐蝕性ガラス繊維 | |
| WO2023190980A1 (ja) | ガラス繊維 | |
| WO2023190983A1 (ja) | ガラス繊維 | |
| WO2026064238A2 (en) | High modulus fiberglass composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23780989 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2024512851 Country of ref document: JP Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 23780989 Country of ref document: EP Kind code of ref document: A1 |