EP4301738A1 - (méth)acrylates contenant un motif 4-thiazolidinone et leurs polymères - Google Patents
(méth)acrylates contenant un motif 4-thiazolidinone et leurs polymèresInfo
- Publication number
- EP4301738A1 EP4301738A1 EP22710665.5A EP22710665A EP4301738A1 EP 4301738 A1 EP4301738 A1 EP 4301738A1 EP 22710665 A EP22710665 A EP 22710665A EP 4301738 A1 EP4301738 A1 EP 4301738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formula
- monomer
- reaction
- meth
- acrylate
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/04—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/08—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D277/12—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D277/14—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D415/00—Heterocyclic compounds containing the thiamine skeleton
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/10—Esters
- C08F120/38—Esters containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F122/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof
- C08F122/10—Esters
- C08F122/1006—Esters of polyhydric alcohols or polyhydric phenols, e.g. ethylene glycol dimethacrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F128/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur
- C08F128/06—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur by a heterocyclic ring containing sulfur
Definitions
- the field of the present invention is that of acrylate or methacrylate monomers comprising a 4-thiazolidinone unit intended for use in the synthesis of polymers by radical polymerization, in particular activated by photoactivatable catalysts.
- the inventors have developed new monomers which make it possible to remedy these drawbacks in the synthesis of polymers containing 4-thiazolidinone units, by using compounds, amine or aldehyde, which are heterodifunctional. Thanks to these new monomers, there is no evolution of water and no 2-mercaptopropionic acid is used in the synthesis of such polymers containing 4-thiazolidinone units.
- a first object of the invention is a monomer which contains a 4-thiazolidinone unit connected to a benzene nucleus and which contains a group comprising a (meth)acrylate function, which monomer is of formula (1-1) wherein Y is (meth)acrylate, Q is methyl, A is a spacer which connects the nitrogen atom of the thiazolidinone ring to Y, Ri is alkyl, m is an integer ranging from 0 to 4, R2 is hydrogen or is a group of formula (I-R2),
- Y' being identical to Y
- Q' being identical to Q
- A' being identical to A
- A' connecting the nitrogen atom of the thiazolidinone ring to Y', the symbol * designating the carbon atom connected to a carbon of the benzene ring by covalent bond
- the spacers being a divalent alkanediyl chain which can be interrupted by one or more oxygen atoms or by one or more COO, OCO functions or alternatively be substituted by one or more OH functions.
- Another object of the invention is a process for the synthesis of a monomer in accordance with the invention which comprises two reactions, the first reaction being a condensation reaction of an aldehyde of formula (II), of a compound (III ) and a compound of formula (IV), the second reaction being an esterification reaction to insert the (meth)acrylate function into the reaction product of the first reaction, the compound (III) being of formula Y1-B-NH2,
- the invention also relates to a polymer containing units of a monomer in accordance with the invention.
- the invention also relates to a polymer obtained by radical polymerization of a monomer in accordance with the invention, alone or as a mixture with another (meth)acrylate monomer.
- the invention also relates to a process for the synthesis of a polymer which comprises the radical polymerization of a monomer in accordance with the invention in the presence of a catalyst which can be photoactivated by irradiation with ultraviolet-visible light.
- the compounds mentioned in the description can be of fossil origin or biobased. In the latter case, they can be, partially or totally, derived from biomass or obtained from renewable raw materials derived from biomass. In the same way, the compounds mentioned can also come from the recycling of materials already used, that is to say they can be, partially or totally, from a recycling process, or obtained from materials raw materials themselves from a recycling process.
- the term “hydroxyl” means the OH group
- “carboxyl” means the COOH function.
- the monomer in accordance with the invention is represented by the following formulas (l-la) and (l-lb) in which Y is (meth)acrylate, Q is methyl, A is a spacer which connects the nitrogen atom of the thiazolidinone ring at Y; R 1 is alkyl, m is an integer ranging from 0 to 4, R 2 is hydrogen, Y' is identical to Y; Q' is the same as Q, A' which connects the nitrogen atom of the thiazolidinone ring to Y' is the same as A.
- the monomer in accordance with the invention therefore has the essential characteristic of containing a 4-thiazolidinone unit which is directly linked to a benzene ring, substituted or not. It also has the other characteristic of being a compound which contains an acrylate or methacrylate function carried by one or more of the symbols Y, Y′.
- m is preferably equal to 0.
- R 2 is preferentially para or meta relative to the thiazolidinone ring, more preferentially para relative to the thiazolidinone ring.
- the spacers represented respectively by the symbols A and A′ make it possible to connect the thiazolidinone rings to the functional groups represented respectively by the symbols Y and Y′.
- the alkanediyls represented respectively by the symbols A and A′ are preferably linear.
- the alkanediyls of the spacers represented respectively by the symbols A and A′ preferably contain 2 to 20 carbon atoms, more preferably are ethanediyl.
- the alkyl groups in the formulas (I-1), (I-R2) can be linear, branched or cyclic. They are preferably linear. They preferably contain 1 to 12 carbon atoms.
- the alkyl groups represented by the symbols R 1 , R 2 are preferentially alkyls having 1 to 3 carbon atoms, more preferentially are methyl. It follows that the alkyl group represented by the symbol R of formula (II) of the compound useful for the synthesis of the monomer is also preferably an alkyl having 1 to 6 carbon atoms, more preferably is methyl.
- the monomer of formula (1-1) can be represented by formula (l-2a) or formula (l-2b) in which Y is (meth)acrylate, Q is methyl, A is a spacer which connects the nitrogen atom of the thiazolidinone ring to Y, R2 is hydrogen, Y' is identical to Y; Q' is the same as Q, A' which connects the nitrogen atom of the thiazolidinone ring to Y' is the same as A.
- the monomer is of formula (1-3a-acryl), (1-3a-methacryl), (1-3b-acryl) or (1-3b-methacryl), Q and Q′ being methyl.
- a and A' are alkanediyl, preferably alkanediyls having 2 to 20 carbon atoms in the formulas (l-la), (l-lb), (l-2a), ( 1-2b), (1-3a-acryl), (1-3a-methacryl), (1-3b-acryl), (1-3b-methacryl, more preferably ethanediyl.
- a and A' have the formula -(C y H 2y )-CH2-CH(OH)-CH2- or -(C y H 2y )-COO-CH 2 -CH 2 - in the formulas (l-la), (l-lb), (l-2a), (l-2b), (l-3a-acryl), (l-3a-methacryl), (l-3b- acryl), (1-3b-methacryl), preferably A and A' are of formula -(C y H 2y )-CH2-CH(OH)-CH2-.
- y integer preferably varies from 2 to 6.
- y is equal to 2 due to the commercial availability of the precursors useful for the synthesis of the monomer.
- a and A' have the formula -(C y H 2y )-(C z H 2Z 0) p -, y, z and p being integers in the formulas (l- la), (l-lb), (l-2a), (l-2b), (l-3a-acryl), (l-3a-methacryl), (l-3b-acryl), (l-3b- methacryl).
- integer y preferentially varies from 2 to 6
- z preferentially varies from 2 to 6
- the values of y and z are advantageously chosen equal to 2 due to the commercial availability of the precursors useful for the synthesis of the monomer.
- a and A' are a chain formed from an alkanediyl -(C y H 2y )- and a polar group of formula CH2- CH(OH)-CH2- or-(C y H 2y )-COO-CH2-CH2- linked together via a polyether chain of formula -(C Z H 2Z 0) P -, y, z and p being integers.
- y varies from 2 to 6, z from 2 to 6, p from 1 to 20.
- the values of y and z are advantageously chosen equal to 2 because of the commercial availability of precursors useful for the synthesis of the monomer.
- the monomer according to the invention is typically prepared by a process which comprises two reactions.
- the first reaction is a condensation reaction of an aldehyde of formula (II), of a compound (III) and of a compound of formula (IV) to form the intermediate compounds of formula (V), the compound (III) being of formula Y1-B-NH2, Yi being hydroxyl or carboxyl, Qi being methyl, B being a divalent group which links the nitrogen atom to Yi, Ri being alkyl, m being an integer ranging from 0 to 4, R being hydrogen or an aldehyde function.
- Yi is hydroxyl or carboxyl
- Qi is methyl
- B is a divalent carbon group which connects the nitrogen atom of the thiazolidinone ring to Yi
- Ri is alkyl
- m is an integer ranging from 0 to 4
- R'2 is hydrogen, or a group of formula (V-R2)
- the first reaction of the process leads to an intermediate compound of formula (V) in which R is of formula (V-R2)
- the second reaction leads to the monomer of formula (1-1) in which R2 is of formula (I-R2).
- the second reaction is a reaction to insert the (meth)acrylate function into the intermediate compound of formula (V).
- the second reaction is typically an esterification reaction of the alcohol with (meth)acrylic acid.
- the acid chloride of (meth)acrylic acid can be used instead of (meth)acrylic acid.
- the second reaction is typically an esterification reaction of an alcohol bearing a (meth)acrylate function with the acid.
- the alcohol bearing a (meth)acrylate function is, for example, 2-hydroxyethyl(meth)acrylate.
- monomers according to the invention can be prepared by a process involving one or other of the following reaction sequences:
- Sequence 1 The reaction conditions for synthesizing the monomer are adapted by those skilled in the art according to the reaction scheme involved and taking into account the solubility of each of the substrates and the stoichiometry of the reaction.
- the monomers in accordance with the invention are used in processes for the synthesis of polymers by polymerization reaction of the (meth)acrylate function, in particular in the presence of molecules which are activated when they are exposed to irradiation of ultraviolet-visible light. .
- Such molecules are photoactivatable catalysts whose role is to activate the initiation reaction of the radical polymerization reaction of the (meth)acrylate function.
- photoactivatable catalyst mention may be made of 2,4,6-trimethylbenzoylphenyl phosphinate marketed under the name “Irgacure TPO-L”, phenylbis(2,4,6-trimethylbenzoyljphosphine) oxide marketed under the name “Irgacure 819” , diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide sold under the name "Irgacure TPO”, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone sold under the name "Irgacure 2959”.
- the monomer in accordance with the invention can be polymerized alone or be copolymerized with another monomer, in particular (meth)acrylate.
- another monomer in particular (meth)acrylate.
- comonomer mention may be made of a monomer which is also in accordance with the invention and which differs from the first by its chemical structure.
- any free-radically polymerizable monomer may be suitable.
- monomers comprising an acrylate or methacrylate function such as isobornylacrylate, lauryl methacrylate, diethylene glycol monomethyl ether methacrylate, hexanediol diacrylate, di(ethylene glycol) diacrylate, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate.
- the monomer in accordance with the invention can also be copolymerized with a prepolymer carrying functions which can be polymerized by the radical route, in particular (meth)acrylates.
- prepolymers mention may very particularly be made of polyurethanes bearing a (meth)acrylate function at their chain ends, such as the photoactivatable polyurethane prepolymers marketed for example under the name “TRIXENE” (Chemtura/Lanxess, Italy), “ BOMAR” (DYMAX, USA), or “Ebecryl” (Allnex, USA).
- the monomers in accordance with the invention also have the advantage of polymerizing in a few minutes, typically in less than 3 minutes, under irradiation with ultraviolet-visible light in the presence of a photoactivatable catalyst.
- the monomers in accordance with the invention therefore show all their interest in the synthesis of polymers by 3D printing under irradiation with ultraviolet light.
- Mode 1 Monomer which contains a 4-thiazolidinone unit linked to a benzene nucleus and which contains a group containing a (meth)acrylate function, which monomer has the formula (1-1) wherein Y is (meth)acrylate, Q is methyl, A is a spacer which connects the nitrogen atom of the thiazolidinone ring to Y, Ri is alkyl, m is an integer ranging from 0 to 4, R2 is hydrogen or is a group of formula (I-R2),
- Y' being identical to Y
- Q' being identical to Q
- A' being identical to A
- A' connecting the nitrogen atom of the thiazolidinone ring to Y', the symbol * designating the carbon atom connected to a carbon of the benzene ring by covalent bond
- the spacers being a divalent alkanediyl chain which can be interrupted by one or more oxygen atoms or by one or more COO, OCO functions or alternatively be substituted by one or more OH functions.
- Mode 2 Monomer according to mode 1 in which R2 is para or meta with respect to the thiazolidinone ring when it is different from a hydrogen atom.
- Mode 3 Monomer according to mode 1 or 2 in which R2 is para to the thiazolidinone ring when it is different from a hydrogen atom.
- Mode 4 Monomer according to any one of modes 1 to 3 in which m is equal to 0.
- Mode 5 Monomer according to any one of modes 1 to 4 in which the alkyls represented by
- R1, R2 are alkyls having 1 to 3 carbon atoms.
- Mode 6 Monomer according to any one of modes 1 to 5 in which the alkyls represented by R1, R2 are methyl.
- Mode 7 Monomer according to any one of modes 1 to 6 in which A and A' are alkanediyl.
- Mode 8 Monomer according to any one of modes 1 to 7 in which A and A' are alkanediyls having 2 to 20 carbon atoms.
- Mode 9 Monomer according to any one of modes 1 to 8 in which A and A' are ethanediyl.
- Mode 10 Monomer according to any one of modes 1 to 6 in which A and A' have the formula - (C y H 2y )-CH 2 -CH(OH)-CH 2 - or -(C y H 2y ) -COO-CH 2 -CH 2 -, y being an integer.
- Mode 11 Monomer according to any one of modes 1 to 6 in which A and A' have the formula - (C y H 2y )-(CzH 2z O)p-, y, z and p being integers.
- Mode 12 Monomer according to any one of modes 1 to 6 in which A and A' are a chain formed from an alkanediyl -(C y H 2y )- and from a polar group of formula CH 2 -CH(OH )-CH 2 - or-(C y H 2y )-COO-CH 2 -CH 2 - linked together via a polyether chain of formula -(C z H 2z O) p -, y, z and p being integers.
- Mode 13 Monomer according to any one of modes 10 to 12 in which y is equal to 2.
- Mode 14 Process for the synthesis of a monomer defined in any one of modes 1 to 13 which comprises two reactions, the first reaction being a condensation reaction of an aldehyde of formula (II), of a compound (III ) and a compound of formula (IV), the second reaction being an esterification reaction to insert the (meth)acrylate function into the reaction product of the first reaction, the compound (III) being of formula Y I -B-NH 2 ,
- Yi being hydroxyl or carboxyl, Q 1 being methyl, B being a divalent carbon group which links the nitrogen atom to Yi, Ri being alkyl, m being an integer ranging from 0 to 4, R being hydrogen or an aldehyde function.
- Mode 15 Polymer containing units of a monomer defined in any of modes 1 to 13.
- Mode 16 Polymer obtained by radical polymerization of a monomer defined in any one of modes 1 to 13, alone or as a mixture with another (meth)acrylate monomer.
- Mode 17 A process for synthesizing a polymer which comprises the radical polymerization of a monomer defined in any one of Modes 1 to 13 in the presence of a photoactivatable catalyst with irradiation of ultraviolet-visible light.
- Thermal characterizations by differential scanning calorimetry were carried out with a Mettler Toledo DSC3 device.
- the sample (about 10 mg) is weighed and sealed in a crucible 40 ⁇ L aluminum.
- the crucible is pierced with a fine needle just before the measurement. Dry nitrogen is used as purge gas with a flow of 30 mL min -1 .
- Two successive cycles of heating and cooling are carried out identically. For each cycle, the sample as well as an empty reference crucible are heated from a minimum temperature to a maximum temperature at 10°C min -1 . The temperature is maintained for 2 minutes at the maximum temperature, then it is cooled from the maximum temperature to the minimum temperature at 10° C. min -1 .
- the glass transition temperature (Tg) and the melting temperature (Tm) are measured at the second cycle. If necessary, in the event of loss of mass observed during the second cycle, a third cycle is carried out under the same conditions as the second cycle.
- the glass transition temperature corresponds to the temperature Tmg “midpoint temperature” as defined in standard ASTM D3418-99.
- the melting temperature (Tm) corresponds to the tip of the melting peak.
- a light yellow oil is obtained and is diluted in 30 ml of chloroform.
- the residual methacrylic anhydride is hydrolyzed to sodium methacrylate under basic conditions by adding 10 ml of a buffer solution of NaHCC>3 (pH 9) in a separatory funnel.
- the organic phase is recovered.
- Another 30 ml of CHCl3 are added for the extraction operation which is repeated a second time.
- the recovered organic phases are washed with water, then treated with 1% hydrochloric acid until a neutral pH of the aqueous phase is obtained.
- the organic phase is dried over anhydrous sodium sulfate, filtered through a 5 mil nylon filter. Then 8 mg MEHQ are added to the organic phase, the chloroform is removed by distillation to isolate the methacrylate.
- the reaction medium is stirred at a temperature of 23° C. for 16 hours under a slight flow of nitrogen. Ethanol is removed by distillation at 40°C. Then 50 ml of ethyl acetate are added, followed by 10 ml of 1% hydrochloric acid. The organic phase is separated in a separating funnel and is washed twice with 10 ml of water. Then, 5 mg of an inhibitor, 4-methylphenol (200 ppm), are added and the ethyl acetate is removed by distillation at 40°C. A viscous transparent liquid is obtained. The monomer is purified by chromatography with a heptane:ethyl acetate and methanol mixture (5:5:1, by volume).
- the monomer is synthesized according to the following reaction sequence with the synthesis of 2,2'-(1,4-phenylene)bis[3-(2-hydroxyethyl)-5-methyl-1,3-thiazolidin-4-one] as intermediate product:
- 2,2'-(l,4-phenylene) bis[3-(2-hydroxyethyl)-5-methyl-l,3-thiazolidin-4-one] (793 mg, 2 mmol) and acid anhydride methacrylic acid (630 ml, 2 mmol) are dissolved in 70 ml of acetonitrile, then 4.89 mg of dimethylaminopyridine (0.04 mmol) are added.
- the reaction medium is heated at 55° C. for 15 hours.
- the reaction medium is then filtered through a 5 ⁇ m nylon filter.
- 8 mg of inhibitor, 4-methoxyphenol (MEHQ) are added to the solution and the acetonitrile is removed by distillation at 50° C. using a rotary evaporator.
- a light yellow oil is obtained and is diluted in 30 ml of chloroform.
- the residual methacrylic anhydride is hydrolyzed to sodium methacrylate under basic conditions by adding 10 ml of a buffer solution of NaHCC>3 (pH 9) in a separatory funnel.
- the organic phase is recovered.
- Another 30 ml of CHCl 3 are added for the extraction operation which is repeated a second time.
- the recovered organic phases are washed with water, then treated with 1% hydrochloric acid until a neutral pH of the aqueous phase is obtained.
- the organic phase is dried over anhydrous sodium sulphate, filtered through a 5 ⁇ m nylon filter. Then 8 mg MEHQ are added to the organic phase, the chloroform is removed by distillation to isolate the methacrylate.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Thiazole And Isothizaole Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2102009A FR3120369B1 (fr) | 2021-03-02 | 2021-03-02 | (Méth)acrylates contenant un motif 4-thiazolidinone et leurs polymères |
| PCT/FR2022/050303 WO2022184995A1 (fr) | 2021-03-02 | 2022-02-21 | (méth)acrylates contenant un motif 4-thiazolidinone et leurs polymères |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4301738A1 true EP4301738A1 (fr) | 2024-01-10 |
Family
ID=75690475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22710665.5A Withdrawn EP4301738A1 (fr) | 2021-03-02 | 2022-02-21 | (méth)acrylates contenant un motif 4-thiazolidinone et leurs polymères |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240150305A1 (fr) |
| EP (1) | EP4301738A1 (fr) |
| FR (1) | FR3120369B1 (fr) |
| WO (1) | WO2022184995A1 (fr) |
-
2021
- 2021-03-02 FR FR2102009A patent/FR3120369B1/fr active Active
-
2022
- 2022-02-21 EP EP22710665.5A patent/EP4301738A1/fr not_active Withdrawn
- 2022-02-21 US US18/548,356 patent/US20240150305A1/en active Pending
- 2022-02-21 WO PCT/FR2022/050303 patent/WO2022184995A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022184995A1 (fr) | 2022-09-09 |
| FR3120369A1 (fr) | 2022-09-09 |
| FR3120369B1 (fr) | 2024-01-19 |
| US20240150305A1 (en) | 2024-05-09 |
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