WO2024252075A1 - Procédé de polymérisation par ouverture de cycle ou par polycondensation - Google Patents
Procédé de polymérisation par ouverture de cycle ou par polycondensation Download PDFInfo
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- WO2024252075A1 WO2024252075A1 PCT/FR2024/000061 FR2024000061W WO2024252075A1 WO 2024252075 A1 WO2024252075 A1 WO 2024252075A1 FR 2024000061 W FR2024000061 W FR 2024000061W WO 2024252075 A1 WO2024252075 A1 WO 2024252075A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
- C08G77/08—Preparatory processes characterised by the catalysts used
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- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3442—Heterocyclic compounds having nitrogen in the ring having two nitrogen atoms in the ring
- C08K5/3445—Five-membered rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D233/06—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D233/20—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
Definitions
- the invention relates to a process for preparing linear organopolysiloxanes OL by a polymerization reaction from organopolysiloxanes O (cyclic and/or linear), and using a catalytic system AI. More precisely, the process of the present invention makes it possible to obtain linear organopolysiloxanes OL of controlled molar mass with a very low level of residual cyclic organopolysiloxanes.
- the invention also relates to the catalysts used in the AI catalytic system which will be detailed in detail below.
- organopolysiloxanes by polycondensation or by ring-opening polymerization sees the formation of cyclic organopolysiloxanes such as octamethyltetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) or other unwanted cyclic organopolysiloxanes.
- ring-opening polymerization is preferred because it uses monomers that are easily synthesized, purifiable and therefore inexpensive.
- cyclic silicones or organopolysiloxanes such as octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) are and will be subject to restrictions for their use.
- these cyclic compounds present environmental risks due to their non-biodegradability, they are also suspected of being endocrine disruptors and potentially carcinogenic.
- one of the essential objectives of the invention is therefore to improve the preparation of organopolysiloxane by ring-opening polymerization reaction or by polycondensation, by means of a catalytic system which is more efficient than those used previously and which makes it possible to obtain higher yields of linear organopolysiloxane while limiting the formation of cyclic organopolysiloxanes by retroscission reaction.
- the Applicant has developed a catalytic system which meets these expectations.
- the present invention relates to a process for the preparation of linear organopolysiloxanes OL by a polymerization reaction of at least one organopolysiloxane O, in the presence of a catalytic system AI comprising:
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- An objective of the present application is therefore to propose a process for preparing linear organopolysiloxanes OL by an organopolysiloxane polymerization reaction making it possible to control the molar mass of the final product with a yield of linear organopolysiloxanes OL greater than 90%, preferably greater than 95% and preferentially greater than 98%.
- Another objective of the present application is to provide an AI catalytic system for implementing this process.
- Another objective of the present application is to propose a simple and non-hazardous catalytic system compatible with the implementation of the process.
- Silicones otherwise known as organopolysiloxanes, are polymeric materials comprising alternating silicon and oxygen atoms with various organic radicals bonded to the silicon.
- silicone, silicone product, silicone polymer or organopolysiloxane O means polymers comprising a siloxane skeleton (Si-O-Si) having alternating silicon and oxygen atoms with various organic radicals bonded to silicon.
- These silicone polymers can be liquid or solid, depending on the molecular weight and the degree of polymerization.
- reaction mixture means all of the reactive chemical species present.
- AI catalytic system means a system consisting of:
- the organopolysiloxane O present in the reaction mixture is chosen from: a linear organopolysiloxane alone or in mixtures, a cyclic organopolysiloxane alone or in mixtures, or a mixture of one or more linear and cyclic organopolysiloxanes.
- the linear organopolysiloxane is represented by the following formula (II):
- R 1 identical or different, represents:
- R 2 identical or different, represents:
- q is an integer between 1 and 2000, preferably between 1 and 500, preferably between 1 and 200, more preferably between 1 and 50, and with the condition that at least one radical R 2 is a hydroxyl group (OH).
- the linear organopolysiloxane is represented by the formula (II) in which,
- R 1 identical or different, represents:
- R 2 represent:
- q is an integer between 1 and 500, preferably between 1 and 200, more preferably between 1 and 50.
- the method of the present invention uses at least two organopolysiloxanes O chosen from the linear organopolysiloxanes mentioned above.
- the cyclic organopolysiloxane is represented by the following formula (III): in which, R, identical or different, is a radical representing an alkyl group of 1 to 6 carbon atoms, an alkenyl group of 2 to 6 carbon atoms, or an aryl group of 6 to 18 carbon atoms; and n represents a natural integer between 1 and 2.
- Examples include commercially available cyclic organopolysiloxanes such as hexamethylcyclotrisiloxane (CAS 541-05-9), 2-ethenyl-2’,4,4’,6,6’-pentamethylcyclotrisiloxane (CAS 18395-32-9), 2,4,6-triethenyl-2,4,6-trimethylcyclotrisiloxane (CAS 3901-77-7), hexaphenylcyclotrisiloxane (CAS 512-63-0), l,3,5-Trimethyl-l,3,5-tris(3,3,3-trifluoropropyl)cyclotrisiloxane (CAS 2374-14-3), 2,2,4-Trimethyl-4,6,6-triphenyl-l,3,5,2,4,6-trioxatrisilinane, 1,3,5-Trimethyl-1,3,5-triphenylcyclotrisiloxane (CAS 546-45-2); 2 4 6-trimethylcyclotrisiloxane (CAS
- the cyclic organopolysiloxane is hexamethylcyclotrisiloxane (CAS 541-05-9) or octamethylcyclotetrasiloxane (CAS 556-67-2)
- the method of the present invention uses at least two cyclic organopolysiloxanes chosen from the following compounds: octamethy Icy clo tetrasiloxane (CAS 556-67-2); hexamethylcyclotrisiloxane (CAS 541-05-9) and 2,4,6-triethenyl-2,4,6-trimethylcyclotrisiloxane (CAS 3901-77-7).
- the method of the present invention uses a mixture of linear and cyclic organopolysiloxanes. These different organopolysiloxanes have been more fully defined above.
- catalyst A is represented by the formula
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- catalyst A is represented by the following formula (V): in which:
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- catalyst A is represented by the following formula (VI): in which:
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- catalyst A represented by formula (VI) above in which:
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- catalyst A is represented by the following formula (VII): in which:
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- the process of the invention is characterized in that the molar quantity of catalyst A relative to the organopolysiloxane O is from 0.005% to 2%, preferably from 0.01 to 2%, preferentially from 0.05 to 1%, and even more preferentially from 0.1 to 0.5%.
- the initiator I is chosen from water, alcohols and their derivatives or their mixtures.
- the initiator I is chosen from alcohols having a pKa of 10 to 16, preferably a pKa of 12 to 16, preferentially a pKa of 14 to 16.
- the initiator I is chosen from water or the compounds of formula (VIII): Formula VIII in which:
- Y represents a carbon or silicon atom
- R is the same or different and represents:
- radical R when said radical R may be substituted or not by an alkyl chain of 1 to 12 carbon atoms, alkenyl of 2 to 6 carbon atoms, a cycloalkyl group of 5 to 8 carbon atoms, an aryl group of 6 to 18 carbon atoms or a heteroatom such as oxygen, sulfur or nitrogen.
- the initiator I is represented by the compounds of formula (VIII) above in which:
- Y represents a carbon atom
- R is the same or different and represents:
- radical R when said radical R may be substituted or not by an alkyl chain of 1 to 12 carbon atoms, alkenyl of 2 to 6 carbon atoms, a cycloalkyl group of 5 to 8 carbon atoms, an aryl group of 6 to 18 carbon atoms or a heteroatom such as oxygen, sulfur or nitrogen.
- the initiator I is an alcohol selected from primary alcohols or secondary alcohols.
- the initiator I is an alcohol selected from primary alcohols.
- the initiator I is an alcohol chosen from saturated or unsaturated polyols having 2 to 6 hydroxyl groups.
- the following polyols may be mentioned such as glycerol, pentaerythritol, sorbitol or 1,4 butanediol.
- the initiator I is an alcohol having a pKa of 10 to 16, preferably a pKa of 12 to 16, preferentially a pKa of 14 to 16.
- the initiator I is an alcohol chosen from: methanol (CAS 67-56-1), ethanol (CAS 64-17-5), propanol (CAS 71-23-8), isopropanol (CAS 67-63-0), butanol (CAS 71-36-3), 2-methylpropan-2-ol (CAS 75-65-0), allyl alcohol (CAS 107-18-6), benzyl alcohol (CAS 100-51-6), 3-buten-l-ol (627-27-0), long chain alkyl alcohols such as undecanol (CAS 112-42-5) or dodecanol (CAS 27342-88-7).
- the initiator I is benzyl alcohol (CAS 100-51-6).
- the initiator I is water.
- the process of the invention is characterized in that the molar ratio of initiator I relative to catalyst A is from 0 to 20, preferably from 0 to 10, preferably from 0 to 5, preferentially from 0 to 2.
- the method of the invention is characterized in that the molar quantity of initiator I relative to the organopolysiloxane O introduced is from 0.005% to 10%, preferably from 0.01% to 5%, preferentially from 0.05% to 2.5%, and even more preferentially from 0.1% to 1%.
- the method of the invention uses an initiator I represented by the formula (IX): Formula IX in which:
- R is the same or different and represents:
- radical R may be substituted or not by an alkyl chain of 1 to 12 carbon atoms, alkenyl of 2 to 6 carbon atoms, a cycloalkyl group of 5 to 8 carbon atoms, an aryl group of 6 to 18 carbon atoms or a heteroatom such as oxygen, sulfur or nitrogen.
- the process of the present invention uses an initiator I chosen from trimethylsilanol (CAS 1066-40-6) or triethyl silanol (CAS 597-52-4).
- the polymerization reaction of at least one organopolysiloxane O further comprises at least one chain blocker C.
- the chain blocker C is represented by the formula (X): in which,
- R 1 identical or different, represents CH3 or phenyl, preferably CH3;
- R 2 identical or different, represents:
- a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 5 carbon atoms, optionally substituted by at least one heteroatom O, N, S or a halide such as a fluorine atom, for example 1 to 10 fluorine atoms, for example (Ci-C5)alkyl-CF3, the alkyl being linear or branched,
- q is an integer between 1 and 50, preferably between 1 and 20, more preferably between 1 and 10.
- the C chain blocker of the invention is represented by the formula (X), in which:
- R 1 identical, represents CH3,
- R 2 identical or different, represents:
- q is an integer between 1 and 20, preferably between 1 and 10, more preferably between 1 and 5.
- the chain blocker C can be in a solvent. This is particularly advantageous in order to solubilize it in the reaction mixture.
- the solvent may in particular be an apolar solvent such as an organic solvent of the alkane or aromatic hydrocarbon type.
- the solvent is chosen from n-hexane, n-heptane, n-decane, n-dodecane, isododecane, EXXSOL D60, xylene, toluene and mixtures thereof.
- the process of the invention is characterized in that the molar ratio of chain blocker C relative to catalyst A is from 0 to 30, preferably from 0 to 20, and preferentially from 0 to 10.
- the linear organopolysiloxane OL may be a compound of formula (XI):
- R identical or different, represents:
- -an alkyl group comprising from 1 to 15 carbon atoms, preferably from 1 to 12 carbon atoms, preferably from 1 to 10 carbon atoms, preferably from 1 to 5 carbon atoms, preferably methyl,
- an aryl group comprising from 6 to 10 carbon atoms, preferably phenyl
- R 1 identical or different, represents:
- R 2 identical or different, represents:
- -a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 5 carbon atoms, optionally substituted by at least one heteroatom O, N, S or a halide such as a fluorine atom, for example 1 to 10 fluorine atoms, for example (Ci-C5)alkyl-CF3, the alkyl being linear or branched, - a C5-C10 cycloalkyl group, optionally substituted,
- the linear organopolysiloxane OL is a compound of formula (XI): in which,
- R identical or different, represents CH3 or phenyl, preferably CH3;
- R 1 identical or different, represents:
- R 2 identical or different, represents:
- R 3 represents: an alkyl group comprising from 1 to 10 carbon atoms, an alkenyl group comprising from 2 to 10 carbon atoms, or a benzyl group
- m2 represents an integer between 0 and 5000, preferably between 0 and 1000, more preferably between 0 and 100.
- the linear organopolysiloxane OL of the invention is a compound of formula (XI) in which,
- R identical or different, represents CH3 or phenyl, preferably CH3, R 1 , identical or different, represents CH3, phenyl or vinyl;
- R 2 identical or different, represents:
- R 3 represents: an alkyl group comprising from 1 to 10 carbon atoms, an alkenyl group comprising from 2 to 10 carbon atoms, or a benzyl group q is equal to 0; n2 represents an integer between 10 and 10,000, preferably between 10 and 5,000, preferably between 10 and 1,000, more preferably between 10 and 500; m2 represents an integer between 0 and 5000, preferably between 0 and 1000, more preferably between 0 and 100.
- the linear organopolysiloxane OL of the invention is a compound of formula (XII) in which:
- R identical or different, represents CH3 or phenyl, preferably CH3, R 1 , identical or different, represents CH3, phenyl or vinyl;
- R 2 identical, represent:
- R 3 represents: an alkyl group comprising from 1 to 10 carbon atoms, an alkenyl group comprising from 2 to 10 carbon atoms, or a benzyl group q is equal to 0; ni represents an integer between 10 and 5,000, preferably between 10 and 1,000, more preferably between 10 and 500; m2 represents an integer between 0 and 1,000, preferably between 0 and 500, more preferably between 0 and 100.
- the linear organopolysiloxane OL of the invention is characterized in that its degree of polymerization is strictly greater than that of the organopolysiloxane O introduced into the reaction mixture.
- the linear organopolysiloxane OL of the invention is characterized in that its degree of polymerization is at least twice as high, at least three times as high or at least five times as high as that of the organopolysiloxane O introduced into the reaction mixture.
- the mass-average molar mass and the number-average molar mass, denoted respectively Mw and Mn, of the various linear organopolysiloxanes OL can be determined by size exclusion chromatography (SEC) in the presence of polystyrene standards in a solvent such as toluene at 35°C.
- SEC size exclusion chromatography
- the linear organopolysiloxane OL of the invention is characterized in that its number-average molar mass M n is between 500 and 1,000,000 g/mol, preferably between 500 and 500,000 g/mol, preferentially between 500 and 100,000 g/mol and even more preferentially between 500 and 50,000 g/mol.
- the linear organopolysiloxane OL of the invention is characterized in that its dynamic viscosity is between 100 and 1,000,000 mPa.s at 25°C, preferably between 100 and 500,000 mPa.s at 25°C, even more preferably between 100 and 100,000 mPa.s at 25°C.
- the mass percentage or the weight percentage of cyclic organopolysiloxanes (such as D4) of the products obtained according to the process of the present invention can be measured via the quantitative spectra of NMR- 29 Si.
- the mass percentage or the weight percentage of D4 of the products obtained according to the process of the present invention could be measured via the chromatograms resulting from a size exclusion chromatography (SEC) analysis.
- SEC size exclusion chromatography
- the product resulting from the reaction is called the sum of the linear organopolysiloxane OL and the organopolysiloxane OC resulting from the process of the present invention.
- the method according to the invention is characterized in that the content of cyclic organopolysiloxanes OC is less than 2%, preferably less than or equal to 1%, preferably less than or equal to 0.5% relative to the total mass of product resulting from the reaction.
- the process according to the invention is characterized in that the octamethylcyclotetrasiloxane (D4) content is less than 2%, preferably less than or equal to 1%, preferably less than or equal to 0.5% relative to the total mass of product resulting from the reaction.
- D4 octamethylcyclotetrasiloxane
- the method according to the invention is implemented in an apolar solvent.
- the solvent may in particular be an organic solvent of the alkane, aromatic hydrocarbon or alcohol type such as ethanol.
- the solvent is chosen from n-hexane, n-heptane, n-decane, n-dodecane, cyclohexane, isododecane, EXXSOL D60, xylene, toluene and mixtures thereof.
- the amount of solvent used in the process of the invention is the minimum amount necessary to solubilize catalyst A in the reaction mixture.
- the catalyst can thus be solubilized in ethanol or toluene.
- the reaction is carried out at a temperature between 50°C and 170°C, preferably between 80 and 150°C, more preferably between 80 and 110°C.
- the reaction time is between 1h and 72h, preferably between 8h and 72h, more preferably between 18h and 72h.
- the present application also relates to the linear organopolysiloxane OL obtained according to the different embodiments of the process of the present invention described above. It also relates to a silicone composition comprising the organopolysiloxane OL obtained according to the different embodiments of the process of the present invention described above.
- composition for implementing the method of the present invention comprising:
- an AI catalytic system as defined above, and optionally a C chain blocker as defined above.
- the present application also relates to the use of the organopolysiloxanes OL obtained according to the process of the present invention as an ingredient which can be directly used in various silicone formulations useful in fields such as cosmetics, household cleaning products, automobiles, energy.
- the present application also relates to catalysts A represented by the following formula (XII): in which:
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- the catalysts A are represented by the following formula (XIII): in which:
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- -a cycloalkyl group of 5 to 8 carbon atoms -an alkenyl group of 2 to 12 carbon atoms, -a benzyl group or a phenyl.
- - a linear or branched alkyl group comprising from 1 to 12 carbon atoms, preferably from 1 to 8 carbon atoms, optionally substituted by a heteroatom O, N, S or a halide
- R2 identical or different represent:
- the present application also concerns the use of the catalysts defined according to the formulae (XII, XIII and XIV) as catalysts for ring-opening polymerization or polycondensation.
- Cyclic organopolysiloxane Oi hexamethylcyclotrisiloxane (CAS 541-05-9)
- Cyclic organopolysiloxane O2 octamethylcyclotetrasiloxane (CAS 556-67-2)
- Initiator Ii Benzyl alcohol (CAS 100-51-6)
- Initiator I2 ethanol (CAS 64-17-5)
- Ci chain blocker divinyltetramethyldisiloxane (CAS 2627-95-4).
- the residual mass percentages of cyclic organopolysiloxanes OC and the mass percentages of linear organopolysiloxane OL obtained according to the method of the present invention are measured by size exclusion chromatography (SEC) in the presence of polystyrene standards in a solvent such as toluene at 35 °C.
- SEC size exclusion chromatography
- M n of the different linear organopolysiloxanes according to the present invention OL is determined by the same size exclusion chromatography (SEC) method.
- the mass percentage of residual cyclic organopolysiloxanes is referred to as the mass percentage of cyclic organopolysiloxane at the end of the process implemented according to the present invention.
- the precursors a x as mentioned in the reaction scheme below are obtained by the reaction of diiodine (1.4 eq.) and imidazole (1.5 eq.) which are added to a PI13P solution (1.3 eq.) in dichloromethane (50 mL) at room temperature with stirring for 5 minutes. Then, a solution of the alcohol precursor (ix) (1.0 eq.) in dichloromethane (10 mL) is added to the reaction mixture by syringe and then said mixture is stirred at room temperature overnight.
- the product bx formed in the previous step is placed in 20mL of THF and then KHMDS (leq.) was added to the reaction mixture.
- the reaction mixture is stirred at room temperature for 1h. Then, the solvent was removed and the product was extracted with pentane and filtered. After drying under vacuum, the catalysts Ai, A2, or A3 are obtained in the form of a white solid. The synthesis yields of these catalysts are shown below.
- Example 2 General protocol for implementing the method of the present invention:
- the AI catalytic system is formed by the association of catalyst A (Ai, A20U A3 for example) (leq, 0.025mmol) and from 0 to n equivalents of initiator I, (such as Ii, I2 or I3 for example).
- catalyst A Al, A20U A3 for example
- I initiator
- the different tables below indicate the different molar ratios I/A.
- This freshly formed AI catalyst system is mixed in a solution containing an organopolysiloxane Oi, O2 OR O3 (5.07 mmol).
- the content of catalyst A is 0.5 mol% relative to the organopolysiloxane O.
- a chain blocker such as Ci is added to the reaction mixture.
- the reaction mixture is then heated to a temperature and for a time indicated in each of the examples of the present invention.
- Example 3a Implementation of the process of the present invention in the presence of the organopolysiloxane O2
- Example 2 the general protocol of Example 2 was implemented.
- organopolysiloxane O2 (CAS 556-67-2) was used.
- the initiator is Ii and the molar ratio I/A is equal to 1.
- the reaction mixture was heated at 80°C for a period of 16 h.
- an OL product is obtained having a cyclic organopolysiloxane content of less than 1% under these operating conditions.
- Example 3b Implementation of the process of the present invention in the presence of the organopolysiloxane Oi:
- Example 2 For the purpose of this example, the general protocol of Example 2 was implemented. In this example, organopolysiloxane Oi (CAS 541-05-9) was used. The initiator is Ii. In test 1 of the table below, the reaction mixture was heated to 110°C for a period of 24 h for test 1.
- Example 2 For the purpose of this example, the general protocol of Example 2 was implemented.
- organopolysiloxane O2 (CAS 556-67-2) and catalyst A2 were used.
- the molar ratio I/A is equal to 1.
- Example 5 Influence of different C/A molar ratios on the process of the present invention: For the purpose of this example, the general protocol of Example 2 was implemented.
- organopolysiloxane O2 (CAS 556-67-2), catalyst Ai, initiator Ii and chain blocker Ci were used.
- reaction mixture was heated to a temperature of 80°C for a period of 48 hours.
- the table below shows the molar ratio of chain blocker C to the molar amount of catalyst A used as well as the characteristics of the product OL obtained according to the process of the invention.
- the molar ratio I/A is 5.
- Varying the amount of chain blocker material C influences the molar mass of the product obtained according to the process of the present invention.
- the OL product obtained according to the process of the invention has a very low mass percentage of residual cyclic organopolysiloxane OC (less than 1% by mass relative to the total mass of the product resulting from the reaction).
- Example 6 Implementation of the method of the present invention without initiator:
- Example 2 the general protocol of Example 2 was implemented.
- organopolysiloxane O2 (CAS 556-67-2), catalyst Ai and chain blocker Ci were used.
- the reaction mixture was heated to a temperature of 110°C for a period of 48 h.
- the process of the present invention makes it possible to obtain a linear organopolysiloxane OL without or with a very low mass percentage of residual cyclic organopolysiloxane OC.
- Example 7 Polycondensation reaction: process of the present invention carried out in the presence of organopolysilxoane O3 without initiator:
- catalyst Ai (0.5mol%, 0.0137mmol) is mixed into a solution containing organopolysiloxane O3 (2.73mmol).
- a chain blocker such as Ci is added to the reaction mixture as shown in the table below.
- the reaction mixture was heated to a temperature of 110°C for a period of 48 h.
- the table below shows the molar ratio of the chain blocker Ci used relative to the molar amount of catalyst A used as well as the characteristics of the product OL obtained according to the process of the invention.
- this example demonstrates that the process of the present invention leads to the obtaining of very satisfactory results for polycondensation reactions.
- Example 8 Process of the present invention carried out in the presence of O3:
- catalyst Ai (0.5mol%, 0.0136mmol) is mixed into a solution containing a mixture of organopolysiloxane O2 (1.36mmol) and O3 (1.36 mmol). The reaction mixture was heated to a temperature of 110°C for a period of 48 h.
- the linear organopolysiloxane OL was obtained at 99.9% (and only 0.1% of residual cyclic organopolysiloxane OC).
- the molar mass of the product OL obtained is 75,000 g/mol.
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- Polymers & Plastics (AREA)
- Silicon Polymers (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480037767.3A CN121263407A (zh) | 2023-06-09 | 2024-06-06 | 通过开环或通过缩聚的聚合方法 |
| KR1020257040824A KR20260006015A (ko) | 2023-06-09 | 2024-06-06 | 개환 또는 중축합 중합 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2305832 | 2023-06-09 | ||
| FR2305832A FR3149609B1 (fr) | 2023-06-09 | 2023-06-09 | Procédé de polymérisation par ouverture de cycle ou par polycondensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024252075A1 true WO2024252075A1 (fr) | 2024-12-12 |
Family
ID=87801338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2024/000061 Pending WO2024252075A1 (fr) | 2023-06-09 | 2024-06-06 | Procédé de polymérisation par ouverture de cycle ou par polycondensation |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20260006015A (fr) |
| CN (1) | CN121263407A (fr) |
| FR (1) | FR3149609B1 (fr) |
| WO (1) | WO2024252075A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073279A1 (fr) | 2003-12-30 | 2005-08-11 | Rhodia Chimie | Procede de preparation de polyorganosiloxanes (pos) par polymerisation par ouverture de cycle(s) et/ou redistribution de pos, en presence de carbene(s) et compositions de pos mises en oeuvre dans ce procede |
| EP2327736A1 (fr) * | 2008-09-01 | 2011-06-01 | Nanjing University of Technology | Procédé ajustable et contrôlable de polymérisation de composés cycliques par ouverture de cycle par catalyse de dérivés du carbène |
| US20180163001A1 (en) * | 2015-07-27 | 2018-06-14 | Dow Corning Corporation | Polyorganosiloxane compositions with metal based n-heterocyclic carbene condensation reaction catalysts and methods for the preparation thereof |
-
2023
- 2023-06-09 FR FR2305832A patent/FR3149609B1/fr active Active
-
2024
- 2024-06-06 CN CN202480037767.3A patent/CN121263407A/zh active Pending
- 2024-06-06 KR KR1020257040824A patent/KR20260006015A/ko active Pending
- 2024-06-06 WO PCT/FR2024/000061 patent/WO2024252075A1/fr active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073279A1 (fr) | 2003-12-30 | 2005-08-11 | Rhodia Chimie | Procede de preparation de polyorganosiloxanes (pos) par polymerisation par ouverture de cycle(s) et/ou redistribution de pos, en presence de carbene(s) et compositions de pos mises en oeuvre dans ce procede |
| US20080097064A1 (en) * | 2003-12-30 | 2008-04-24 | Delphine Blanc-Magnard | Method for Preparing Polyorganosiloxanes (Pos) by Ring (S) - Opening Polymerization and/or Pos Redistribution in the Presence of Carbene (S) and Pos Compounds Produced by Said Method |
| EP2327736A1 (fr) * | 2008-09-01 | 2011-06-01 | Nanjing University of Technology | Procédé ajustable et contrôlable de polymérisation de composés cycliques par ouverture de cycle par catalyse de dérivés du carbène |
| US20180163001A1 (en) * | 2015-07-27 | 2018-06-14 | Dow Corning Corporation | Polyorganosiloxane compositions with metal based n-heterocyclic carbene condensation reaction catalysts and methods for the preparation thereof |
Non-Patent Citations (1)
| Title |
|---|
| "Chemistry and Technology of Silicones", 1968, ACADÉMIE PRESS, pages: 264 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3149609B1 (fr) | 2025-07-11 |
| CN121263407A (zh) | 2026-01-02 |
| KR20260006015A (ko) | 2026-01-12 |
| FR3149609A1 (fr) | 2024-12-13 |
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