WO2005073279A1 - 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 - Google Patents
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 Download PDFInfo
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- WO2005073279A1 WO2005073279A1 PCT/FR2004/050665 FR2004050665W WO2005073279A1 WO 2005073279 A1 WO2005073279 A1 WO 2005073279A1 FR 2004050665 W FR2004050665 W FR 2004050665W WO 2005073279 A1 WO2005073279 A1 WO 2005073279A1
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- 0 Cc(cc1C)cc(C)c1N(C)CCNc1c(C)cc(C)cc1* Chemical compound Cc(cc1C)cc(C)c1N(C)CCNc1c(C)cc(C)cc1* 0.000 description 1
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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
- 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
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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
Definitions
- PROCESS FOR THE PREPARATION OF POLYORGANOSILOXANES POS BY POLYMERIZATION BY OPENING OF CYCLE (S) AND / OR REDISTRIBUTION OF POS, IN THE PRESENCE OF CARBENE (S) AND POS COMPOSITIONS IMPLEMENTED IN THIS PROCESS
- the field of the invention is that of the synthesis of silicones: PolyOrganoSiloxanes (POS), by polymerization by opening of cycle (s) and / or redistribution of linear and / or non-linear and / or cyclic POSs.
- POS PolyOrganoSiloxanes
- the invention relates to a process for the preparation of POS by polymerization by opening of cycle (s) and / or redistribution of POS, in particular of POScy, in the presence of a catalyst (or initiator) consisting of at least one nucleophilic carbene .
- the invention also relates to POS and carbenic catalyst compositions, used in these polymerization reactions by opening of cycle (s) / redistribution of cyclic POSs (POS), leading to POS oils (molar mass ranging for example from 10 3 to 10 4 ) or to POS gums (molar mass ranging for example from 10 3 to 10 7 ).
- POS cyclic POSs
- the invention also relates to certain POSs or silanes substituted by carbenic catalytic functions, as new Persian products.
- Silicones are nowadays widely used in industry. The major part of these are polymerized siloxanes or are based on these derivatives. For this reason, the synthesis of these polymers by polymerization by opening of cycle (s) is a very important research axis and numerous publications have appeared on the subject.
- the opening-ring polymerization of oligosiloxanes uses easily synthesizable and purifiable monomers and moreover it allows better control of the molecular weight of the polymer obtained. In practice, this method is one of the industrial routes used to date.
- ring opening polymerization (ROP) of cyclic organosiloxanes is a technique widely used in the silicone industry to prepare oils, gums or resins, functionalized or not.
- the most commonly used monomers at present are octamethylcyclotetrasiloxane (D 4 ) and hexamethylcyclotrisiloxane (D).
- the polymerization can be carried out anionically via basic catalysts or cationically via acidic catalysts.
- the cationic route is often preferred for the synthesis of linear POS because the reaction takes place at a sufficiently high speed, at room temperature and the initiator can be easily removed from the polymer.
- the negative point of this method is the significant formation of cyclic POSs which appear particularly in the early stages of polymerization.
- This mode of polymerization is based on increasing the reactivity of the Si-0 bond for monomers having a tense ring such as cyclotrisiloxanes. The use of these substrates makes it possible to work under conditions of kinetic control.
- cationic polymerization catalysts such Bronsted or protonic acids such as H 2 S0 hci0 the triflic acid are widely described. These acids can also be put on solid supports, mineral for example. These catalysts are effective at moderate temperatures, for example of the order of 50 to 100 ° C. Lewis acids: AICI 3j SbCl ⁇ , SnCI ... may also be suitable but require high temperature conditions (> 200 ° C).
- the phosphonitrile halides of structure CI 3 PNPCI 2 NPCI 3 .PCI 6 are also described as catalysts for polymerization by opening of effective rings at temperatures from 40 to 120 ° C. They are also good condensation catalysts.
- the anionic route is more often used for the formation of linear polymers with high molecular weight. This process includes 3 stages: -1- the priming phase is the attack of the siloxane by the base to lead to the formation of a silanolate at the end of the chain:
- OMIM corresponds to an alkali metal or an alkaline earth in the diagrams above.
- the latter make it possible to avoid the priming step.
- the polymerization reaction requires an elevated temperature.
- the reaction can be carried out dry, in a solvent or in emulsion.
- Polymerization can be stopped using an acid additive which reacts with the initiator or with the polymer chains to make them non-reactive.
- these additives can be used to regulate the molecular weight of the polymer and / or add an advantageous property. In most cases, the initiator residues remain in the polymer produced or are eliminated.
- KOH is poorly soluble and must therefore be used under conditions of high temperature ( ⁇ 150 ° C).
- catalytic compounds such as quaternary phosphoniums, in particular tetrabutylphosphonium hydroxide and quaternary ammoniums such as tetramethylammonium hydroxide. These catalysts are soluble in the polyorganosiloxane medium and can polymerize D4 at temperatures between 70 and 130 ° C. These catalysts are sensitive to the presence of water and degrade thermally from 130-150 ° C.
- the super bases known as Schwesinger bases easily generating in the presence of water or methanol, the hydroxides or the corresponding methylates, are excellent polymerization catalysts. Indeed, these systems having a soft counter-ion have a low tendency to associate ion pairs and promote the initiation and polymerization of organocyclosiloxanes. These catalysts operate at low temperature (80 ° C) as at high temperature (140 ° C) and are well suited for continuous processes. Their cost is very high.
- EP -A-0 860 459 EP-A-0 860 460, EP-A-0 860 461
- EP-B-5 994 490 discloses a similar system which is obtained by mixing phosphazenes and a tertiary alcohol: eg tert-butanol. -t
- European patent application EP-A-0982 346 describes a process for producing a POS having a volatile content (POScy) of less than 1% by weight, using a condensation polymerization of a siloxane carrying groups silanol or by means of a polymerization by opening of POScy cycles (D4), with a phosphazene type Superbase and in the presence of water. After neutralization of the catalyst, the POS obtained is subjected to a revaporization treatment to remove the volatiles (D4) at more than 200 ° C.
- POScy volatile content
- PCT application WO-A-03/054058 relates to the synthesis of silicone by anionic polymerization of cyclic organosiloxane oligomers, in the presence of a weakly nucleophilic Superbase based on aminophosphonium yeast derivatives of formula 3 below:
- This composition comprises: - a polyorganovinylsiloxane (polydimethyl) (mehylvinyl) siloxane, - a polyorganohydrogensiloxane, - a platinum catalyst formed by a C3 or C4 complex: possibly a crosslinking inhibitor, and possibly a filler.
- Hydrosilylation is neither a polymerization by opening of cycle (s), nor a polymerization by redistribution. In such hydrosilylation, carbene only plays the role of platinum ligand.
- patent EP-B-0 971 941 describes catalysts based on Ruthenium and Osmium / carbene complexes, for the thermal metathesis of cycloolefins.
- N-heterocyclic carbenes can be used as catalyst for polymerization of cyclic esters. More specifically, 1,3-bis- (2,4,6-trimethylphenyl) imidazol-2-ylidene was tested as a polymerization catalyst for L-lactide, ⁇ caprolactone and ⁇ -butyrolactone, in the presence of 'an alcohol used as an initiator.
- one of the essential objectives of the invention is to improve the preparation of POS by opening the cycle (s) and / or by redistribution of POS, by means of a catalytic system which is more effective than those used previously, even at low temperature and which makes it possible to obtain, in a profitable and selective manner, a linear or non-linear polyorganosiloxane, functionalized or not.
- Another essential objective of the invention is to provide a new process for the synthesis of PolyOrganoSiloxane silicones, by polymerization by opening of cycle (s) and / or redistribution of linear or cyclic POSs, in which the conversion yield, at room temperature , starting POS (for example of D4) is considerably increased compared to what exists, so as to obtain lower residual rates of starting POS (for example of D4) than with the catalytic systems most often described .
- Another essential objective of the invention is to provide a new process for the synthesis of PolyOrganoSiloxane silicones, by polymerization by opening of cycle (s) and / or redistribution of linear or cyclic - preferably cyclic - POSs, which is simple and economical to to implement, in particular as regards the final stages of purification, namely for example neutralization and devolatilization.
- Another essential objective of the invention is to provide a new process for the synthesis of PolyOrganoSiloxane silicones, by polymerization by opening of cycle (s) and / or redistribution of linear or cyclic - preferably cyclic - POSs, by means of a system.
- high performance catalytic which has at least one of the following characteristics: * soluble in silicone oils and in particular silicone gums; * simple and inexpensive to synthesize; * stable; * with good resistance to hydrolysis; and which allows: * to polymerize POS such as POScy (eg D 4 ), under mild conditions (low temperatures ⁇ 100 ° C); * to decrease the reaction times, in particular for the preparation of viscous oils and gums; * reduce, or even eliminate, the residues of catalyst and its derivatives in the final polymer, in order to prepare silicone polymers of high viscosity and improved thermal resistance, and this in a cost-effective manner; * to functionalize a whole range of cyclic POSs, linear or non-linear and functionalized or not; * to improve the polydispersity of the polymers formed and to favor the formation of linear structures compared to the cyclic oligomers; * easy removal of any catalyst residue; * favor the formation of linear silicone polymers over the formation of cyclics; * guarantee high reproducibility; * and to limit
- Another essential objective of the invention is to provide a new efficient catalytic system for the synthesis of PolyOrganoSiloxane silicones, by polymerization by opening of cycle (s) and / or redistribution of linear or cyclic POSs, said catalytic system being provided with all or part of the properties referred to in the above objectives.
- Another essential objective of the invention is to provide a composition which can be used in particular for the preparation of PolyOrganoSiloxanes (POS) by opening of cycle (s) and / or by redistribution of POS, comprising linear, nonlinear or cyclic POSs (POScy) and an efficient catalyst (C) endowed with all or some of the properties targeted in the above objectives.
- POS PolyOrganoSiloxanes
- Another essential objective of the invention is to provide new POSs or silanes substituted by catalytic radicals, useful in the efficient synthesis of POS silicones, by polymerization by ring opening (s) and / or by redistribution of linear POSs, non-linear or cyclic.
- the carbenes are particularly suitable for the preparation of PolyOrganoSiloxanes silicones, by anionic polymerization (polymerization by opening of cycle (s) / redistribution) of linear or cyclic polyorganosilxanes (POS) - preferably cyclic-.
- the process according to the invention is not only much more effective than before, but also economical. It is also simple to implement, since the purification operations (neutralization / volatilization) are reduced or even eliminated. This process provides access to POSs of variable viscosity, including POSs of high viscosity.
- ring opening polymerization corresponds to a polymerization in which a cyclic compound (monomer) is opened to form a linear polymer.
- redistribution polymerization corresponds to the meaning of a person skilled in the art in silicone chemistry. In particular, the
- redistribution polymerization is understood in the field of silicones, as a rearrangement of organosiloxanes of different structures and / or molar mass. This rearrangement leads to a single new POS.
- the method for preparing POS according to the invention therefore involves a polymerization mechanism by ring opening and / or by redistribution of POS, to the exclusion of any hydrosilylation reaction.
- the carbenic catalyst (C) used has the characteristic of being nucleophilic and this nucleophilia is directly involved in the catalysis of polymerization by ring opening and / or by redistribution of POS, to the exclusion of any hydrosilylation reaction.
- the carbene (s) of the catalyst (C) comprise two non-binding electrons which are in the singlet or triplet form, preferably singlet.
- the carbene (s) of the catalyst (C) has (s) a general structure represented by the formula (1 °):
- X and Y are independently chosen from the group comprising: S, P, Si, N and O;
- X and Y can be linked by at least one optionally substituted five, six or seven-membered hydrocarbon ring; or a five, six or seven-membered heterocycle comprising one or more heteroatoms chosen from the group comprising: S, P, Si, N and O, and optionally substituted.
- the carbenes used are carbenes, advantageously stable, having a general structure represented by the formulas (I), (I ") or (I"):
- the carbene (s) of the catalyst (C) correspond (s) to formula (II) or (IT): (H) (H ') in which:
- T3, T3 ', T4 and T4 "independently represent a hydrogen atom; an alkyl group; cycloalkyl optionally substituted by alkyl or aikoxy; aryl optionally substituted by alkyl or aikoxy; alkenyl; alkynyl; or arylalkyl in which the aryl part is optionally substituted by alkyl or aikoxy; or alternatively
- T3 and T4 can form together and with A and B when these each represent a carbon atom, an aryl being understood that in this case T3 'and T4' are not present;
- T1 and T2 independently represent an alkyl group; an alkyl group optionally substituted by alkyl; a perfluorinated alkyl group or optionally substituted by a perfluoroalkyl group; cycloalkyl optionally substituted by alkyl or aikoxy; aryl optionally substituted with alkyl or aikoxy; alkenyl; alkynyl; or arylalkyl in which the aryl part is optionally substituted by alkyl or aikoxy; or
- V1 and T2 independently represent a monovalent radical of formula (V) below: - V1 - V2 (V) in which: • V1 is a divalent hydrocarbon group, saturated or not, preferably a linear or branched C1-C10 alkylene, optionally substituted, • V2 is a monovalent group chosen from the group of the following groups: * alkoxy, -OR a with R a corresponding to hydrogen, alkyl, aryl; * silyl, -Si (OR) x (R c ) 3- with R corresponding to hydrogen, alkyl, silyl or siloxanyl, R ° corresponding to alkyl, aryl and x being an integer between 0 and 3; * amine, preferably -N (R a ) 2 with R a corresponding to hydrogen, alkyl, aryl; or even ;
- alkyl is meant a saturated, linear or branched hydrocarbon chain, optionally substituted (eg by one or more alkyls), preferably from 1 to 10 carbon atoms, for example from 1 to 8 carbon atoms, better still from 1 to 7 carbon atoms.
- alkyl groups are in particular methyl, ethyl, isopropyl, n-propyl, tert-butyl, isobutyl, n-butyl, n-pentyl, isoamyl and 1,1-dimethylpropyl.
- the alkyl part of the alkoxy group is as defined above.
- the perfluorinated alkyl group or optionally substituted by a perfluoroalkyl group preferably corresponds to the formula: - (CH 2 ) P - C q F 2 q + ⁇ in which p represents 0, 1, 2, 3 or 4, q is an integer from 1 to 10; and C q F 2q + ⁇ is linear or branched.
- Preferred examples of this group are:
- aryl designates an aromatic hydrocarbon group, having
- polycyclic aromatic group a group having two or more aromatic rings, condensed (orthocondensed or ortho and pericondensed) to each other, that is to say having, two by two, at least two carbons in common.
- aromatic hydrocarbon group (“aryl”) is optionally substituted for example by one or more C1-C3 alkyls, one or more halogenated hydrocarbon groups (eg CF 3 ), one or more alkoxy (eg CH 3 0) or one or more hydrocarbon groups comprising one or more ketone units (eg CH 3 CO-).
- aryl is optionally substituted for example by one or more C1-C3 alkyls, one or more halogenated hydrocarbon groups (eg CF 3 ), one or more alkoxy (eg CH 3 0) or one or more hydrocarbon groups comprising one or more ketone units (eg CH 3 CO-).
- aryl designates an alkyl group as defined above, substituted by one or more aryl groups on its hydrocarbon chain, the aryl group being as defined above. Examples are benzyl and triphenylmethyl.
- cycloalkyl is meant a saturated hydrocarbon group mono- or polycyclic, preferably mono- or bicyclic, preferably having from 3 to 10 carbon atoms, better still from 3 to 8.
- saturated polycyclic hydrocarbon group is meant a group having two or several cyclic nuclei attached to each other by ⁇ or / bonds and condensed two by two. Examples of polycyclic cycloalkyl groups are adamantane and norbornane.
- alkenyl is meant an unsaturated, linear or branched hydrocarbon chain, substituted or not, having at least one olefinic double bond, and more preferably a single double bond.
- the alkenyl group has from 2 to 8 carbon atoms, better still from 2 to 6.
- This hydrocarbon chain optionally comprises at least one heteroatom such as O, N, S.
- Preferred examples of alkenyl groups are the allyl groups and homoallyl.
- an unsaturated hydrocarbon chain linear or branched, substituted or not, having at least one acetylenic triple bond, and more preferably a single triple bond.
- the alkynyl group has from 2 to 8 carbon atoms, better still from 2 to 6 carbon atoms.
- This hydrocarbon chain optionally comprises at least one heteroatom such as O, N, S.
- silyl is meant according to the invention, a linear or branched group containing at least one silicon atom. Polydimethylsiloxane chains are examples of silyl groups.
- T1 and T2 in this formula (II) are: - alkyl, in particular n-propyl, n-pentyl, neo-pentyl (-CH 2 -C (CH 3 ) 3 );
- - cycloalkyl in particular cyclopentyl, cyclohexyl or adamantyl
- T3 and T4 both correspond to hydrogen or together form an aryl, and better still a phenyl.
- carbenes there may be mentioned those described in Table 2, page 48 of the publication "Bourissou et al. Chem. Rev. 2000, 100, 39-91". This table 2, page 48, is included by reference in this presentation.
- the carbene (s): • is (are) prepared (s) separately,: r • and / or is (are) generated (s) in situ from at least a precursor.
- the (or) precursors) is (are) a salt (s) corresponding) to (x) carbene (s), which is (are) reacted with at least one base, so as to generate in situ the carbene (s).
- T1, T2, T3, T3 ', T4 and T4' are as defined above;
- - Z1 independently represents an anion derived from a Brônsted acid (protic acid) preferably chosen from the group comprising: • carboxylic acids of formula G 0 -COOH in which G 0 represents an alkyl, and advantageously a C1- alkyl C22; an aryl, advantageously a C6-C18 aryl optionally substituted by one or more C1-C6 alkyl; • sulfonic acids of formula G 0 -S0 3 H in which G 0 is as defined above; • phosphoric acids of formula G 0 -P0 3 H in which G 0 is as defined above; • the following mineral acids: HF, HCI, HBr, Hl, H 2 S0 4 , H 3 P0 4 , HCI0 and HBF 4 taken alone or in combination with one another; • and their mixtures.
- a Brônsted acid protic acid
- acids are the carboxylic acids of formula:
- G 0 -COOH in which G 0 represents alkyl, and for example (C1-C22) alkyl; or else aryl, and for example (C6-C18) aryl optionally substituted by one or more alkyls, preferably one or more (C1 -C6) alkyls; sulfonic acids of formula:
- G 0 -S0 3 H wherein G 0 is as defined above; and phosphonic acids of formula: G 0 -P0 3 H in which G ⁇ is as defined above; other acids are
- carboxylic acids are acetic acid, benzoic acid, and stearic acid.
- sulfonic acid benzene sulfonic acid will be mentioned, and as preferred phosphonic acid, phenylphosphonic acid will be mentioned.
- the anions Z derived from HCI acids are more particularly preferred
- Z anions according to the invention are the halide anions and the tetrafluoroborate and hexafluorophosphate.
- the nature of the Z1 anion in the salts of formula (III) depends on the acid used in this step.
- the acids which can be used are, for example, those listed above and those from which Z1 is derived.
- the solubility of the catalyst (C) based on carbene (s) and / or its precursor (s) is checked, using at least one solubilization aid and / or using one (or des) carbene (s) substituted (s) by at least one appropriate group.
- solubilization auxiliaries mention may be made of solvents such as
- TetraHydroFurane THF
- solubilization groups include alkyls, aryls, fluorinated groups, silyls, siloxanes such as chains
- this may be the ambient temperature, which is particularly economical and easy to implement, on an industrial level.
- the viscosity of the silicone phase it is also possible to work at a higher temperature.
- the method according to the invention offers a lot of flexibility in this regard.
- the catalyst concentration [C] (in moles per 100 g of starting POS, for example linear (s) and / or cyclic (s)) in the reaction medium is such that: [C] ⁇ 1 preferably 10 "5 ⁇ [C] ⁇ 10 " 1 and more preferably still 10 "5 ⁇ [C] ⁇ 10 " 3 .
- the rate of polymerization by ring opening and / or redistribution depends in particular on this concentration [C]. According to a variant of the invention, it is possible to interrupt the polymerization reaction by opening the cycle and / or redistribution:
- reaction medium for example at a temperature> 150 ° C;
- POS cyclic POS
- R c represents hydrogen or an optionally substituted alkyl, alkenyl, aryl, aralkyl, alkylaryl group and 3 ⁇ q ⁇ 12.
- R ° is preferably chosen from alkyl groups having from 1 to 8 carbon atoms inclusive, optionally substituted by at least one halogen atom, advantageously from methyl, ethyl, propyl and 3.3 groups, 3-trifluoropropyl and as well as among the aryl groups and, advantageously, among the xylyl and tolyl and phenyl radicals. In practice, it may be D 4 or D 3 , optionally vinylated.
- the starting POSs can be linear and, in this case, are advantageously selected from those of general formula (XII.1):
- R a [(R) 2 Si-0-] p-Si (R b ) 2- R a (XII.1) in which: - R a independently represent a hydroxyl, an alkyl or an aryl, optionally comprising one or more heteroatoms and optionally substituted (s) by halogens, - R D independently represent an alkyl or an aryl, optionally comprising one or more heteroatoms and optionally substituted (s) by halogens, - and p> 2.
- the starting POSs can also be formed by mixtures of at least two of the following POS species: POSCy, linear POSs and non-linear POSs.
- M2 hexamethyldisiloxane
- M2 hexamethyldisiloxane
- M2 hexamethyldisiloxane
- M2 hexamethyldisiloxane
- M2 hexamethyldisiloxane
- M2 hexamethyldisiloxane
- M2
- the adjustment of the viscosity of the reaction medium during the polymerization is within the reach of the skilled person. It can be carried out by any means.
- the reaction medium is subjected to conventional reaction conditions.
- the final POS / POScy ratio in the reaction medium is greater than 85/15, preferably greater than or equal to 90/10, and, more preferably still greater than or equal to 95/5.
- the process according to the invention also incorporates, if necessary, conventional steps for neutralization and / or recovery / purification of the targeted POS
- the invention relates to a composition which can be used in particular for the preparation of PolyOrganoSiloxanes (POS) by polymerization by opening of cycle (s) and / or by redistribution of POS, characterized in that it comprises:
- M2 hexamethyldisiloxane
- M2 vinylated M2
- hydrogenated M2 hydrogenated
- This composition is that of an improved reaction medium according to the invention.
- This medium makes it possible to easily, efficiently and economically obtain POSs, by ring-opening polymerization if the starting POSs are POScy and / or by redistribution.
- This medium is in particular that specific to the process according to the invention, as described above.
- the catalyst (C) the starting POSs and the (or the) base (s) - initiator (s) which are as defined above.
- the catalyst (C) it can be generated in situ from at least one precursor chosen from the group comprising one or more corresponding salt (s) to the carbene (s), suitable for ) to react with at least one base, so as to generate the carbene (s) in situ.
- composition can advantageously include at least one solubilization aid and / or the carbene (s) can (be) substituted by at least one solubilizing group.
- solubilization aid and / or the carbene (s) can (be) substituted by at least one solubilizing group.
- the concentration of catalyst [C] (in moles per 100 g of starting POS, for example, linear (s) and / or cyclic (s)) in the reaction medium is such that: [C] ⁇ 1 of preferably 10 5 ⁇ [C] ⁇ 10 _1 and more preferably still 10 "5 ⁇ [C] ⁇ 10 " 3 .
- a starting reaction POS composition according to the invention can be as follows: * 500 g of POS and / or POScy (eg D4); 0 to 10 g, preferably 0.5 to 2 g, of chain stopper (eg M2); * 0 to 10 g, preferably 0.01 to 1 g, of carbene precursor salt (formulas (III) or (III ') eg: imidazolium salt); * 0 to 10 g, preferably 0.01 to 0.5 g, base, (eg: t-Bu-OK); * 0.1 to 10 mL of solvent (eg THF).
- the present invention also relates to a silicone composition rich in at least one POS obtained by polymerization by opening of cycle (s) and / or redistribution of POS, with opening of cycle (ROP) in the case where at least part of the POS are POScy, characterized in that it comprises catalyst (C) as defined above.
- Another subject of the invention consists of a silicone composition comprising at least one POS obtained by opening cycles then polymerization by opening of cycle (s) / redistribution of POScy, characterized by a POS / POScy ratio greater than 85/15, preferably greater than or equal to 90/10, and more preferably still greater than or equal to 95/5.
- compositions which can be described as “final”, correspond, among other things, to those obtained at the end of the POS preparation process as described above or to those obtained from the reaction composition independently targeted within the framework of the invention and also described above.
- “carbenic" catalyst residues may be present in trace amounts.
- certain other components of the above-mentioned reaction composition can be found in these final compositions.
- the invention opens a new way in the polymerization catalysis by opening of cycle (s) and / or redistribution of POS and or of POScy (ROP), in the presence of carbenes or carbene precursors, for the preparation of POS.
- the precursor imidazolium salt 1 is prepared according to the conventional operating protocol described in the literature using HBF4 as Brônstedt acid. It has the following structure:
- the other raw materials are commercially available.
- the reaction mixture is stirred at room temperature for 24 h. It remains very fluid and the NMR analysis of the silicon shows that less than 5% of the D4 has polymerized.
- the reaction mixture is stirred at 60 ° C for 2 h. It becomes a little more viscous and an analysis by NMR of the silicon shows that only 30% of D4 has polymerized to be in the form of a polysiloxane chain.
Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/584,774 US7772350B2 (en) | 2003-12-30 | 2004-12-08 | 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 |
JP2006546271A JP5196789B2 (ja) | 2003-12-30 | 2004-12-08 | カルベンの存在下でのポリオルガノシロキサン(pos)の開環重合及び/又は再分配によるposの製造方法並びに該方法によって製造されたpos化合物 |
EP04816519.5A EP1701992B1 (fr) | 2003-12-30 | 2004-12-08 | 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 |
CN2004800394811A CN1918215B (zh) | 2003-12-30 | 2004-12-08 | 在存在碳烯的条件下,用开环聚合和/或pos再分布来制备聚有机硅氧烷(pos)的方法以及用该方法制备的pos化合物 |
KR1020067015539A KR101179719B1 (ko) | 2003-12-30 | 2004-12-08 | 카르벤의 존재하에서 pos의 개환중합 및/또는 재분배중합에 의한 폴리오가노실록산 (pos) 제조 방법 및 상기 방법에 의해 생산된 pos 화합물 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0351232 | 2003-12-30 | ||
FR0351232A FR2864543B1 (fr) | 2003-12-30 | 2003-12-30 | 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 |
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WO2005073279A1 true WO2005073279A1 (fr) | 2005-08-11 |
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PCT/FR2004/050665 WO2005073279A1 (fr) | 2003-12-30 | 2004-12-08 | 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 |
Country Status (7)
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US (1) | US7772350B2 (fr) |
EP (1) | EP1701992B1 (fr) |
JP (1) | JP5196789B2 (fr) |
KR (1) | KR101179719B1 (fr) |
CN (1) | CN1918215B (fr) |
FR (1) | FR2864543B1 (fr) |
WO (1) | WO2005073279A1 (fr) |
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WO2008068258A1 (fr) * | 2006-12-06 | 2008-06-12 | Rhodia Operations | Composition comprenant un carbene et une matrice organique, son procede d'obtention et son utilisation |
JP2009534497A (ja) * | 2006-04-21 | 2009-09-24 | ブルースター シリコーン フランス | カルベン触媒を用いたシリル単位の縮合方法 |
WO2010022684A1 (fr) | 2008-09-01 | 2010-03-04 | 南京工业大学 | Procédé ajustable et contrôlable de polymérisation de composés cycliques par ouverture de cycle par catalyse de dérivés du carbène |
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FR2909673B1 (fr) * | 2006-12-08 | 2009-03-06 | Rhodia Recherches & Tech | Polymerisation controlee de monomeres porteurs d'un groupement alpha-beta insature en presence d'un carbene |
FR2910004A1 (fr) * | 2006-12-14 | 2008-06-20 | Rhodia Recherches & Tech | Procede d'oligomerisation et/ou polymerisation du composes insatures |
EP2328952B1 (fr) * | 2008-08-27 | 2016-11-09 | Dow Corning Corporation | Procédé de redistribution de polysiloxane |
CN101665565B (zh) * | 2008-09-01 | 2012-01-04 | 南京工业大学 | 一种用卡宾衍生物催化制备聚乳酸的方法 |
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JP4893787B2 (ja) * | 2009-07-23 | 2012-03-07 | 信越化学工業株式会社 | オルガノポリシロキサン及びその製造方法 |
WO2011083146A1 (fr) | 2010-01-08 | 2011-07-14 | Bluestar Silicones France Sas | Procede de preparation de carbene en solution, nouvelle forme stable de carbene obtenu notamment par ce procede et applications de celle-ci en catalyse. |
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KR101653068B1 (ko) * | 2011-07-07 | 2016-08-31 | 블루스타 실리콘즈 프랑스 에스에이에스 | 카르벤-유형 촉매의 존재 하에서 탈수소 축합 반응에 의해 가교될 수 있는 실리콘 조성물 |
CN105164184A (zh) | 2011-12-29 | 2015-12-16 | 3M创新有限公司 | 可固化聚硅氧烷涂料组合物 |
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WO2015026691A1 (fr) | 2013-08-23 | 2015-02-26 | Momentive Performance Materials Inc. | Catalyseur pour la synthèse de siloxanes |
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WO2003099909A1 (fr) * | 2002-05-23 | 2003-12-04 | Rhodia Chimie | Composition de silicone pouvant etre reticulee en elastomere par hydrosilylation en presence de catalyseurs metalliques a base de carbene, et catalyseurs de ce type |
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JP4410422B2 (ja) * | 1999-05-24 | 2010-02-03 | カリフォルニア インスティチュート オブ テクノロジー | イミダゾリジンに基づく金属カルベンメタセシス触媒 |
JP3978566B2 (ja) * | 1999-09-09 | 2007-09-19 | 信越化学工業株式会社 | 分岐状オルガノポリシロキサンエマルジョンの製造方法 |
FR2801887B1 (fr) * | 1999-12-07 | 2002-10-11 | Rhodia Chimie Sa | Complexes metalliques appropries a la catalyse de reactions d'hydrosilylation, composition catalytique les contenant et leur utilisation |
FR2813081B1 (fr) * | 2000-08-17 | 2005-12-23 | Rhodia Chimie Sa | Procede de preparation d'huiles silicones par hydrosilylation de synthons contenant au moins un cycle hydrocarbone dans lequel est inclus un atome d'oxygene en presence d'un complexe metallique catalytique |
US6455029B1 (en) * | 2000-10-17 | 2002-09-24 | Kerr Corporation | Dental impression material utilizing ruthenium catalyst |
FR2825709B1 (fr) | 2001-06-07 | 2005-07-01 | Rhodia Chimie Sa | Composition silicone reticulable en elastomere par hydrosilylation, en presence de catalyseurs metalliques a base de carbenes, et catalyseurs de ce type |
-
2003
- 2003-12-30 FR FR0351232A patent/FR2864543B1/fr not_active Expired - Fee Related
-
2004
- 2004-12-08 US US10/584,774 patent/US7772350B2/en not_active Expired - Fee Related
- 2004-12-08 KR KR1020067015539A patent/KR101179719B1/ko active IP Right Grant
- 2004-12-08 WO PCT/FR2004/050665 patent/WO2005073279A1/fr active Application Filing
- 2004-12-08 JP JP2006546271A patent/JP5196789B2/ja not_active Expired - Fee Related
- 2004-12-08 CN CN2004800394811A patent/CN1918215B/zh not_active Expired - Fee Related
- 2004-12-08 EP EP04816519.5A patent/EP1701992B1/fr not_active Not-in-force
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US5124417A (en) * | 1990-02-12 | 1992-06-23 | Minnesota Mining And Manufacturing Company | Initiators for cationic polymerization |
US5077414A (en) * | 1990-03-29 | 1991-12-31 | E. I. Du Pont De Nemours And Company | Preparation of 1,3-disubstituted imidazolium salts |
WO2003099909A1 (fr) * | 2002-05-23 | 2003-12-04 | Rhodia Chimie | Composition de silicone pouvant etre reticulee en elastomere par hydrosilylation en presence de catalyseurs metalliques a base de carbene, et catalyseurs de ce type |
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NYCE GREGORY W.: "In Situ Generation of Carbenes: A General and Versatile Plattform for Organocatalytic Living Polymerisation", J.AM.CHEM.SOC., vol. 125, no. 10, 12 March 2003 (2003-03-12), 2003, pages 3046 - 3056, XP002283820 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009534497A (ja) * | 2006-04-21 | 2009-09-24 | ブルースター シリコーン フランス | カルベン触媒を用いたシリル単位の縮合方法 |
KR101021824B1 (ko) | 2006-04-21 | 2011-03-17 | 상뜨로 나쇼날 드 라 러쉐르쉐 샹띠피크 | 카르벤 촉매를 사용하여 실릴 단위를 축합하는 방법 |
WO2008068258A1 (fr) * | 2006-12-06 | 2008-06-12 | Rhodia Operations | Composition comprenant un carbene et une matrice organique, son procede d'obtention et son utilisation |
FR2909679A1 (fr) * | 2006-12-06 | 2008-06-13 | Rhodia Recherches & Tech | Composition comprenant un carbene et une matrice organique, son procede d'obtention et son utilisation |
WO2010022684A1 (fr) | 2008-09-01 | 2010-03-04 | 南京工业大学 | Procédé ajustable et contrôlable de polymérisation de composés cycliques par ouverture de cycle par catalyse de dérivés du carbène |
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 |
EP2327736A4 (fr) * | 2008-09-01 | 2013-07-10 | Univ Nanjing | Procédé ajustable et contrôlable de polymérisation de composés cycliques par ouverture de cycle par catalyse de dérivés du carbène |
Also Published As
Publication number | Publication date |
---|---|
EP1701992A1 (fr) | 2006-09-20 |
JP2007517103A (ja) | 2007-06-28 |
US7772350B2 (en) | 2010-08-10 |
CN1918215A (zh) | 2007-02-21 |
CN1918215B (zh) | 2012-01-25 |
JP5196789B2 (ja) | 2013-05-15 |
KR101179719B1 (ko) | 2012-09-07 |
FR2864543A1 (fr) | 2005-07-01 |
KR20070018845A (ko) | 2007-02-14 |
US20080097064A1 (en) | 2008-04-24 |
FR2864543B1 (fr) | 2006-03-03 |
EP1701992B1 (fr) | 2015-11-11 |
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