EP3688056A1 - Procédé de préparation d'un polymère comportant des liaisons multiples en tant que précurseur d'élastomère - Google Patents

Procédé de préparation d'un polymère comportant des liaisons multiples en tant que précurseur d'élastomère

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Publication number
EP3688056A1
EP3688056A1 EP18772819.1A EP18772819A EP3688056A1 EP 3688056 A1 EP3688056 A1 EP 3688056A1 EP 18772819 A EP18772819 A EP 18772819A EP 3688056 A1 EP3688056 A1 EP 3688056A1
Authority
EP
European Patent Office
Prior art keywords
carbon
alkyl
anhydride
aryl
unsaturated
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Withdrawn
Application number
EP18772819.1A
Other languages
German (de)
English (en)
Inventor
Thomas Ernst MÜLLER
Christoph Gürtler
Muhammad Afzal SUBHANI
Rakibul KABIR
Walter Leitner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covestro Intellectual Property GmbH and Co KG
Original Assignee
Covestro Deutschland AG
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Filing date
Publication date
Application filed by Covestro Deutschland AG filed Critical Covestro Deutschland AG
Publication of EP3688056A1 publication Critical patent/EP3688056A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/50—Polyethers having heteroatoms other than oxygen
    • C08G18/5096—Polyethers having heteroatoms other than oxygen containing silicon
    • 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
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
    • C08G65/336—Polymers modified by chemical after-treatment with organic compounds containing silicon
    • 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
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/02—Aliphatic polycarbonates
    • C08G64/0208—Aliphatic polycarbonates saturated
    • C08G64/0225—Aliphatic polycarbonates saturated containing atoms other than carbon, hydrogen or oxygen
    • C08G64/0266—Aliphatic polycarbonates saturated containing atoms other than carbon, hydrogen or oxygen containing silicon
    • 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
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/18—Block or graft polymers
    • C08G64/183—Block or graft polymers containing polyether sequences
    • 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
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/18—Block or graft polymers
    • C08G64/186—Block or graft polymers containing polysiloxane sequences

Definitions

  • the present invention relates to a process for producing an organooxysilyl-terminated polymer and a process for preparing an elastomer precursor. It further relates to the products obtainable by these processes.
  • EP 2 845 872 A1 discloses a process for preparing side chain polyethercarbonate polyols comprising the steps of: (a) providing a catalyst and: ( ⁇ ) a suspending agent which does not contain H-functional groups and / or (a) an H-functional starter substance ; ( ⁇ ) metering in carbon dioxide and at least two alkylene oxides, these alkylene oxides being the same or different from the alkylene oxide or dosed alkylene oxides added in step (b), the difference between the molecular weight of the lightest and the heaviest of those metered in step ( ⁇ ) Alkylene oxides greater than or equal 24 g / mol and the lightest alkylene oxide is a C 2 -C 4 -alkylene oxide and furthermore in the event that no H-functional starter substance was initially introduced in step (a), step ( ⁇ ) comprises the metered addition of an H-functional starter substance. Also claimed is the use of the polyethercarbonate polyol as a crosslinkable component within a crosslinking reaction
  • Unsaturated polyethercarbonate polyols are crosslinkable via their carbon-carbon multiple bonds.
  • WO 2015/032645 A1 discloses a process for preparing mercapto-crosslinked polyether carbonates, in which double bond-containing polyethercarbonate polyols are reacted with polyfunctional mercaptans and / or sulfur under the action of initiator compounds.
  • cross-linking reaction is the reaction of the unsaturated polyether carbonate polyols with radical initiators.
  • radical initiators for use of the unsaturated polyether carbonate polyols in the production of elastomers, their present molecular weight achievable molecular weight is at least a factor of 10 too low.
  • the formation of Si-O-Si bridges could be a possibility.
  • the necessary functionality must first be introduced into the polyol.
  • DE 10 2008 000 360 A1 discloses the preparation of polyether alcohols bearing alkoxysilyl groups by alkoxylation of epoxide-functional alkoxysilanes using DMC catalysts. The copolymerization with a number of other comonomers, especially other epoxides, but also carbon dioxide is mentioned. With example 6, DE 10 2008 000 360 A1 contains a concrete example of the copolymerization of an epoxide-functional alkoxysilane with propylene oxide and carbon dioxide. The carbonate content achieved in this case is about 4% by weight.
  • sensitive epoxides in particular epoxide-functional alkoxysilanes.
  • a molecular weight increase by Formation of Si-O-Si bridges not disclosed.
  • EP 1 509 533 A1 discloses a process for preparing organic polyol silanes, the process comprising: (a) combining at least one alkoxysilane with one or more organic polyols, either neat or in the presence of a polar solvent, and heating at elevated temperatures for a sufficient time Period of time for the reaction of the alkoxysilane (s) with the organic polyol (s) to produce polyol-substituted silanes and alkoxy-derived alcohols without the use of a catalyst wherein the polyol-substituted silanes contain no residual alkoxy groups; and (b) removing the alkoxy-derived alcohols. If, as provided in this patent application, no residual alkoxy groups are present, no increase in molecular weight can be achieved by the intramolecular structure of Si-O-Si groups.
  • elastomeric precursor is provided which has not yet reacted to a solid three-dimensional network and is therefore processable on machines and in particular malleable.
  • the elastomer is then obtained.
  • the object has been achieved in a first aspect by a process for preparing a polymer containing organooxysilyl end groups, the process comprising the step of: A) reacting a carbon-carbon double bonds-containing polyoxyalkylene polyol, preferably a carbon-carbon double bond-containing polyethercarbonate polyol, with a Organooxysilyl compound of the formula Si (X) n (R0) 4-n in Presence of a catalyst (A), where:
  • X is independently C 1 -C 8 alkoxy, C 7 -C 20 aralkoxy, C 6 -C 14 -roxy, C 7 -C 20 -alkyl, C 1 -C 20 -acyloxy;
  • R 0 independently represents saturated or unsaturated C 1 -C 22 -alkyl, C 6 -C 14 -aryl, C 7 -C 14 -aralkyl, C 7 -C 14 -alkylaryl and n is 3 or 4.
  • the object has been achieved by a process for preparing an elastomeric precursor, the process comprising the step of: B) heating an organooxysilyl-endblocked polymer according to claim 11 to a temperature of> 65 ° C in the presence of a catalyst (B).
  • step A) the difunctional, trifunctional or tetrafunctional organooxysilyl compound reacts with free OH groups of the polyol with elimination of the corresponding alcohol.
  • step B the molecular weight is increased by intramolecular condensation, whereby the elastomeric precursor can be obtained.
  • an organooxysilyl compound to a polyoxyalkylene which has already been functionalized with at least one double bond enables an efficient and selective process control.
  • an in situ polymerization of compounds containing organooxysilyl groups already in the context of terpolymerization for the preparation of the polyoxyalkylene, for example by the addition of epoxy-functional silanes the stoichiometric composition and the structure of the polymer can be clearly demonstrated by the process according to the invention in step A) better control.
  • the synthetic guide according to the invention in step A) avoids the risk of premature crosslinking of the polymer during the synthesis or work-up.
  • the OH end groups of the OH-functional starter substances or of the polymer formed could react with the organooxysilyl groups with transetherification.
  • step A) with downstream organooxysilyl functionalization leads to a significantly greater number of process degrees of freedom.
  • polyoxyalkylene polyols which are suitable according to the invention are polyetherpolyols, polyethercarbonatepolyols, polyetheresterpolyols and / or polyetherestercarbonatepolyols.
  • the reaction in step A) is preferably carried out according to the standards of common laboratory practice, that is, in particular for a predetermined period of time, at a predetermined temperature, under control of the reaction progress and with a purification of the reaction product.
  • the predetermined period of time may be, for example,> 1 hour to ⁇ 12 hours. Suitable reaction temperatures are in particular> 80 ° C to ⁇ 120 ° C. The progress of the reaction can conveniently be monitored by IR spectroscopy on the basis of the decrease in the O-H stretching band of the polyol precursor.
  • the reaction product is purified.
  • the purification is carried out by applying negative pressure.
  • unreacted organooxysilyl compounds and, at least in part, the catalyst can be removed.
  • the carbon-carbon polyoxyalkylene polyol containing multiple bonds is obtainable by addition of alkylene oxide, carbon-carbon multiple bond-containing monomer and CO 2 to H-functional starter substance in the presence of a double metal cyanide catalyst.
  • the proportion of the carbon-carbon multi-bond-containing monomer is> 0.1 wt .-% to ⁇ 60 wt .-%, preferably> 0.5 wt .-% to ⁇ 30 wt .-% and particularly preferably> 1.0 wt % to ⁇ 15% by weight, based on the total amount of alkylene oxide, carbon dioxide and carbon-carbon used multi-bond-containing monomer.
  • preparation of double bond-containing polyoxyalkylene polyols may include the steps:
  • At least two alkylene oxides wherein at least one of the two epoxides has a double bond
  • this process further comprises the step ( ⁇ ) between step (a) and step ( ⁇ ): ( ⁇ ) metering in at least one alkylene oxide, the alkylene oxide or doses of the alkylene oxides added in step ( ⁇ ) being different from ß) metered alkylene oxide or dosed alkylene oxides may be the same or different.
  • polyoxyalkylene polyol containing multiple bonds By choosing suitable unsaturated compounds in the synthesis of polyoxyalkylene polyol containing multiple bonds, it is possible to obtain polymers which have particularly favorable properties in comparison with the prior art.
  • the multiple bonds containing polyoxyalkylene polyols can be reproducibly obtained in high yield and show by the chosen process control a narrow molecular weight distribution and only a very small proportion of unreacted monomers.
  • the polyoxyalkylene polyol formed can additionally contain ester groups in addition to ether and carbonate groups.
  • the temperature in step ( ⁇ ) may be greater than or equal to 60 ° C and less than or equal to 150 ° C.
  • This temperature range during the polymerization has been found to be particularly suitable for synthesizing the multiple bond-containing polyoxyalkylene polyols with a sufficient reaction rate and with a high selectivity. In the range of lower temperatures, an insufficient reaction rate can occur and at higher temperatures, the proportion of undesired by-products can increase too much.
  • the usable process according to the invention can be used as monomers without unsaturated groups alkylene oxides having 2 to 45 carbon atoms, which carry no multiple bond.
  • the alkylene oxides having 2 to 45 carbon atoms are, for example, one or more compounds selected from the group consisting of ethylene oxide, propylene oxide, 1-butene oxide, 2,3-butene oxide, 2-methyl-1,2-propene oxide (isobutene oxide), 1 -Pentene oxide, 2,3-pentenoxide, 2-methyl-l, 2-butene oxide, 3-methyl-l, 2-butene oxide, alkylene oxides of C6-C22 ⁇ -olefins, such as 1-hexene oxide, 2,3-hexene oxide, 3 , 4-hexene oxide, 2-methyl-l, 2-pentenoxide, 4-methyl-l, 2-pentenoxide, 2-ethyl-l, 2-butene oxide, 1-heptene oxide, 1-octene oxide, 1-nonene oxide, 1-decene oxide , 1-undecene oxide, 1-dodecene oxide, 4-methyl-l, 2-pentenoxide, cyclopenten
  • Examples of derivatives of glycidol are phenyl glycidyl ether, cresyl glycidyl ether, methyl glycidyl ether, ethyl glycidyl ether and 2-ethylhexyl glycidyl ether.
  • the alkylene oxides used may preferably be ethylene oxide and / or propylene oxide, in particular propylene oxide.
  • An H-functional starter substance is furthermore used for the preparation of the polyoxyalkylene polyols which can be used according to the invention.
  • the suspending agents used in step (a) to suspend the DMC catalyst do not contain H-functional groups.
  • Suitable suspending agents are all polar aprotic, weakly polar aprotic and nonpolar aprotic solvents, which each contain no H-functional groups. As suspending agent, it is also possible to use a mixture of two or more of these suspending agents.
  • polar aprotic solvents may be mentioned at this point: 4-methyl-2-oxo-1,3-dioxolane (also referred to below as cyclic propylene carbonate), 1,3-dioxolan-2-one, acetone, methyl ethyl ketone, acetonitrile , Nitromethane, dimethyl sulfoxide, sulfolane, dimethylformamide, dimethylacetamide and N-methylpyrrolidone.
  • 4-methyl-2-oxo-1,3-dioxolane also referred to below as cyclic propylene carbonate
  • 1,3-dioxolan-2-one acetone
  • methyl ethyl ketone acetonitrile
  • Nitromethane dimethyl sulfoxide
  • sulfolane dimethylformamide
  • dimethylacetamide dimethylacetamide
  • N-methylpyrrolidone N-methylpyrrolidone
  • nonpolar and weakly polar aprotic solvents include, for example, ethers, such as dioxane, diethyl ether, methyl tert-butyl ether and tetrahydrofuran, esters, such as ethyl acetate and butyl acetate, hydrocarbons, such as pentane, n-hexane, benzene and alkylated benzene derivatives (eg, toluene, xylene, ethylbenzene) and chlorinated hydrocarbons, such as, chloroform, chlorobenzene, dichlorobenzene, and carbon tetrachloride.
  • ethers such as dioxane, diethyl ether, methyl tert-butyl ether and tetrahydrofuran
  • esters such as ethyl acetate and butyl acetate
  • hydrocarbons such as pentane, n-hexan
  • Preferred suspending agents are 4-methyl-2-oxo-1,3-dioxolane, 1,3-dioxolan-2-one, toluene, xylene, Ethylbenzene, chlorobenzene and dichlorobenzene and mixtures of two or more of these suspending agents used, more preferably 4-methyl-2-oxo-l, 3-dioxolane and 1,3-dioxolan-2- ⁇ or a mixture of 4-methyl-2 oxo-l, 3-dioxolane and l, 3-dioxolan-2-one.
  • one or more compound (s) is selected from the group consisting of aliphatic lactones, aromatic lactones, lactides, cyclic carbonates having at least three, if appropriate substituted methylene groups between the oxygen atoms of the carbonate group, aliphatic cyclic anhydrides and aromatic cyclic anhydrides.
  • such suspending agents are incorporated into the polymer chain later in the course of the polymerization in the presence of a starter. This eliminates downstream purification steps.
  • Aliphatic or aromatic lactones are cyclic compounds containing an ester bond in the ring.
  • Preferred compounds are 4-membered ring lactones such as ⁇ -propiolactone, ⁇ -butyrolactone, ⁇ -isovalerolactone, ⁇ -caprolactone, ⁇ -isocaprolactone, ⁇ -methyl- ⁇ -valerolactone, 5-membered ring lactones, such as ⁇ -butyrolactone, ⁇ -valerolactone, 5-methylfuran-2 (3H) -one, 5-methylidenedihydrofuran-2 (3H) -one, 5-hydroxyfuran-2 (5H) -one, 2-benzofuran-1 (3H) -one and 6-methyl-2-one benzofuran-1 (3H) -one, 6-membered ring lactones such as ⁇ -valerolactone, 1,4-dioxan-2-one, dihydrocoumarin, 1H-isochromen-1-one, 8H-pyr
  • Lactides are cyclic compounds containing two or more ester bonds in the ring.
  • Preferred compounds are glycolide (1,4-dioxane-2,5-dione), L-lactide (L-3,6-dimethyl-1,4-dioxane-2,5-dione), D-lactide, DL-lactide , Meso-lactide and 3-methyl-1,4-dioxane-2,5-dione, 3-hexyl-6-methyl-1,4-dioxane-2,5-dione, 3,6-di (but-3-ene -l-yl) -l, 4-dioxane-2,5-dione (each including optically active forms).
  • the cyclic carbonates used are preferably compounds having at least three optionally substituted methylene groups between the oxygen atoms of the carbonate group.
  • Preferred compounds are trimethylene carbonate, neopentyl glycol carbonate (5,5-dimethyl-1,3-dioxan-2-one), 2,2,4-trimethyl-1,3-pentanediol carbonate, 2,2-dimethyl-1,3-butanediol carbonate, 1,3-butanediol carbonate, 2-methyl-1,3-propanediol carbonate, 2,4-pentanediol carbonate, 2-methylbutan-1, 3-diol carbonate, TMP monoallyl ether carbonate, pentaerythritol diallyl ether carbonate, 5- (2-hydroxyethyl) -1, 3-dioxan-2-one, 5- [2- (benzyloxy) ethyl] -1,3-diox
  • Cyclic carbonates having less than three optionally substituted methylene groups between the oxygen atoms of the carbonate group are not or only to a small extent incorporated into the polymer chain under the conditions of the process according to the invention for the copolymerization of alkylene oxides and CO 2 .
  • cyclic carbonates with less than three optionally substituted methylene groups between the oxygen atoms of the carbonate group can be used together with other suspending agents.
  • Preferred cyclic carbonates having less than three optionally substituted methylene groups between the oxygen atoms of the carbonate group are ethylene carbonate, propylene carbonate, 2,3-butanediol carbonate, 2,3-pentanediol carbonate, 2-methyl-1,2-propanediol carbonate, 2,3-dimethyl-2, 3-butanediol.
  • Cyclic anhydrides are cyclic compounds containing an anhydride group in the ring.
  • Preferred compounds are succinic anhydride, maleic anhydride, phthalic anhydride, 1, 2-cyclohexanedicarboxylic anhydride, diphenic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, Norbornendiklareanhydrid and their chlorination products, succinic anhydride, glutaric anhydride, diglycolic anhydride, 1,8-naphthalic anhydride, succinic anhydride, dodecenylsuccinic anhydride, tetradecenylsuccinic anhydride, hexadecenylsuccinic, octadecenyl succinic anhydride, 3- and 4-nitrophthalic anhydride, tetrachlorophthalic anhydride, tetrabromophthalic anhydride, ita
  • Particularly preferred are succinic anhydride, maleic anhydride and phthalic anhydride.
  • a DMC catalyst double metal cyanide catalyst
  • Suitable zinc carboxylates are, for example, zinc salts of carboxylic acids, in particular dicarboxylic acids, such as adipic acid or glutaric acid.
  • dicarboxylic acids such as adipic acid or glutaric acid.
  • the double metal cyanide compounds contained in the DMC catalysts which can be used in the process according to the invention are the reaction products of water-soluble metal salts and water-soluble metal cyanide salts.
  • terpolymerization in the sense of the invention involves the polymerization of at least one alkylene oxide, at least one comonomer with a multiple bond (alkylene oxide and / or cyclic anhydride) and CO 2 .
  • Terpolymerization in the context of the invention also includes, in particular, the copolymerization of a total of more than three monomers.
  • a suspending agent containing no H-functional groups, an H-functional starter substance, a mixture of a suspending agent containing no H-functional groups and an H-functional starter substance or a mixture of at least two H's and optionally water and / or other volatile compounds are removed by elevated temperature and / or reduced pressure, wherein the DMC catalyst, the suspending agent containing no H-functional groups, the H-functional starter substance, the mixture of a suspension agent containing no H-functional groups and added to the H-functional starter substance or to the mixture of at least two H-functional starter substances before or after the first activation step,
  • step ( ⁇ ) [second activation stage] a partial amount (based on the total amount of the alkylene oxides used in steps ( ⁇ ) and ( ⁇ ) of one or more alkylene oxides is added to the mixture resulting from step (a), the addition a partial amount of alkylene oxide optionally in the presence of CO 2 and / or inert gas (such as nitrogen or argon) can take place, and wherein the step (ß) can also take place several times, ( ⁇ ) [polymerization] one or more alkylene oxides, at least one unsaturated compound (alkylene oxide and / or cyclic anhydride) and carbon dioxide are added continuously to the resulting from step (ß) mixture, wherein the alkylene oxides used for the terpolymerization is the same or from at Step (ß) used alkylene oxides may be different.
  • CO 2 and / or inert gas such as nitrogen or argon
  • step (a) can take place simultaneously or successively in any order;
  • the DMC catalyst is initially introduced in step (a) and simultaneously or subsequently the suspending agent containing no H-functional groups, the H-functional starter substance, the mixture of a suspending agent which does not contain H-functional groups and the H functional starter substance or the mixture of at least two H-functional starter substances.
  • the subject of a preferred embodiment is a process, wherein in step (a) [first activation stage] (al) in a reactor the DMC catalyst and a suspending agent and / or one or more H-functional starter substances are presented,
  • an inert gas for example, nitrogen or a noble gas such as argon
  • an inert gas-carbon dioxide mixture or carbon dioxide is passed and at the same time by removing the inert gas or carbon dioxide (for example with a pump) a reduced pressure (absolute) of 10 mbar to 800 mbar, preferably from 40 mbar to 200 mbar in the reactor.
  • a further preferred embodiment provides a process wherein in step (a) [first activation step] (a1) a suspending agent containing no H-functional groups is an H-functional starter substance, a mixture of a suspending agent which is not H-functional Containing groups and an H-functional starter substance or a mixture of at least two H-functional starter substances, optionally under inert gas atmosphere, under an atmosphere of inert gas-carbon dioxide mixture or under a pure carbon dioxide atmosphere, particularly preferably under an inert gas atmosphere is presented and ( ⁇ 2) in the resulting mixture of DMC catalyst and the suspension agent containing no H-functional groups, the H-functional starter substance, the mixture of a suspending agent containing no H-functional groups and the H-functional starter substance or Mixture of at least two H-functional starter substances at a temperature of 50 to 200 ° C, preferably from 80 to 160 ° C, more preferably from 125 to 135 ° C an inert gas, an inert gas-carbon dioxide mixture or carbon dioxide, particularly preferably initiated inert gas
  • the DMC catalyst may be added in solid form or suspended in a suspending agent and / or a H-functional starter substance. If the DMC catalyst is added as a suspension, it is preferably added in step (a1) to the suspending agent and / or the one or more H-functional starter substances.
  • step (ß) of the second activation stage can be carried out in the presence of CO 2 and / or inert gas.
  • step ( ⁇ ) is carried out under an atmosphere of an inert gas-carbon dioxide mixture (for example, nitrogen-carbon dioxide or argon-carbon dioxide) or a carbon dioxide atmosphere, more preferably under a carbon dioxide atmosphere.
  • the setting of an inert gas-carbon dioxide atmosphere or a carbon dioxide atmosphere and the metering of one or more alkylene oxides can in principle be carried out in different ways.
  • the admission pressure is preferably set by introducing carbon dioxide, the pressure being (absolute) 10 mbar to 100 bar, preferably 100 mbar to 50 bar and particularly preferably 500 mbar to 50 bar.
  • the start of the metering of the alkylene oxide can be carried out at a previously selected form.
  • the total pressure (absolute) of the atmosphere in step ( ⁇ ) is preferably set in the range from 10 mbar to 100 bar, preferably 100 mbar to 50 bar and more preferably 500 mbar to 50 bar.
  • the pressure is readjusted by introducing further carbon dioxide, the pressure (absolute) being 10 mbar to 100 bar, preferably 100 mbar to 50 bar and preferably 500 mbar to 50 bar.
  • the amount of one or more alkylene oxides used in the activation in step ( ⁇ ) is 0.1 to 25.0% by weight, preferably 1.0 to 20.0% by weight, particularly preferably 2.0 to 16.0% by weight, based on the amount of suspending agent and / or H-functional starter substance used in step (a).
  • the alkylene oxide can be added in one step or in stages in several aliquots.
  • a partial amount (based on the total amount of the amount of alkylene oxides used in steps ( ⁇ ) and ( ⁇ ) of one or more alkylene oxides is added to the from step (a) resulting mixture, wherein the addition of a partial amount of alkylene oxide may optionally be carried out in the presence of CO2 and / or inert gas.
  • the step ( ⁇ ) can also be done several times.
  • the DMC catalyst is preferably used in an amount such that the content of DMC catalyst in the resulting multiple bond-containing polyoxyalkylene polyol is 10 to 10,000 ppm, more preferably 20 to 5,000 ppm, and most preferably 50 to 500 ppm.
  • the alkylene oxide may be added, for example, in one portion or within 1 to 15 minutes, preferably 5 to 10 minutes.
  • the duration of the second activation step is preferably 15 to 240 minutes, more preferably 20 to 60 minutes.
  • the metered addition of the alkylene oxide (s), the unsaturated compounds, hereinafter also referred to as monomers, and the carbon dioxide can be carried out simultaneously, alternately or sequentially, the entire amount of carbon dioxide being added at once or metered over the reaction time. It is possible to gradually increase or decrease or equalize the CC pressure during the addition of the monomers. Preferably, the total pressure is kept constant during the reaction by a subsequent addition of carbon dioxide.
  • the dosage of the monomers can be carried out simultaneously, alternately or sequentially to the carbon dioxide dosage. It is possible to meter the monomers at a constant metering rate or to increase or decrease the metering rate continuously or stepwise or to add the monomers in portions.
  • the monomers are added to the reaction mixture at a constant metering rate.
  • the alkylene oxides can be added individually or as a mixture.
  • the metered addition of the alkylene oxides can be carried out simultaneously, alternately or sequentially via separate doses (additions) or via one or more doses, the alkylene oxides being metered in individually or as a mixture can.
  • an excess of carbon dioxide is used based on the calculated amount of carbon dioxide required in polyoxyalkylene polyol containing multiple bonds, because due to the inertness of carbon dioxide, an excess of carbon dioxide is advantageous.
  • the amount of carbon dioxide can be set by the total pressure.
  • the total pressure has been found to be advantageous for the range from 0.01 to 120 bar, preferably 0.1 to 110 bar, particularly preferably from 1 to 100 bar, for the copolymerization to prepare the polyoxyalkylene polyols containing multiple bonds. It is possible to supply the carbon dioxide continuously or discontinuously to the reaction vessel. This depends on how fast the monomers and CO2 are consumed and whether the product should optionally contain CC-free polyether B curls or blocks with different CC contents.
  • the concentration of carbon dioxide may also vary with the addition of the monomers. Depending on the chosen reaction conditions, it is possible to introduce the CO2 in the gaseous, liquid or supercritical state into the reactor. CO2 can also be added to the reactor as a solid and then converted into the gaseous, dissolved, liquid and / or supercritical state under the chosen reaction conditions.
  • step ( ⁇ ) the carbon dioxide may be introduced into the mixture, for example
  • Step ( ⁇ ) is carried out, for example, at temperatures of 60 to 150 ° C, preferably from 80 to 120 ° C, most preferably from 90 to 110 ° C. If temperatures below 60 ° C are set, the reaction stops. At temperatures above 150 ° C, the amount of unwanted by-products increases sharply.
  • the gassing of the reaction mixture in the reactor according to (i) preferably takes place via a gassing ring, a gassing nozzle or via a gas inlet tube.
  • the gassing ring is preferably an annular array or two or more annular arrays of gassing nozzles, which are preferably located at the bottom of the reactor and / or on the sidewall of the reactor.
  • the hollow shaft agitator according to (ii) is preferably a stirrer in which the gas is introduced into the reaction mixture via a hollow shaft of the stirrer.
  • the gassing of the reaction mixture according to (i), (ii), (iii) or (iv) can be carried out in each case with freshly added carbon dioxide and / or combined with an extraction of the gas from the gas space over the reaction mixture and subsequent recompression of the gas.
  • the gas extracted and compressed from the gas space above the reaction mixture optionally mixed with fresh carbon dioxide and / or monomers, is reintroduced into the reaction mixture according to (i), (ii), (iii) and / or (iv).
  • the pressure drop which is formed by incorporation of the carbon dioxide, the monomers in the terpolymerization in the reaction product, balanced over freshly metered carbon dioxide.
  • the introduction of the monomers can be carried out separately or together with the CO2 both via the remplisstechniksoberfikiee or directly into the liquid phase.
  • the introduction of the monomers takes place directly in the liquid phase, since this has the advantage that a rapid mixing of the introduced monomers with the liquid phase takes place and thus local concentration peaks of the monomers are avoided.
  • the liquid phase introduction may be via one or more inlet tubes, one or more nozzles, or one or more annular arrays of multiple dosing sites, preferably located at the bottom of the reactor and / or on the side wall of the reactor.
  • the three steps (a), ( ⁇ ) and ( ⁇ ) can be carried out in the same reactor or separately in different reactors.
  • Particularly preferred reactor types are stirred tank, tubular reactor and loop reactor. If the reaction steps (a), ( ⁇ ) and ( ⁇ ) are carried out in different reactors, a different reactor type can be used for each step.
  • Polyoxyalkylene polyols containing multiple bonds can be prepared in a stirred tank, with the stirred tank being cooled, depending on the embodiment and mode of operation, via the reactor jacket, internal cooling surfaces and / or cooling surfaces located in a pumped circulation system.
  • a stirred tank with the stirred tank being cooled, depending on the embodiment and mode of operation, via the reactor jacket, internal cooling surfaces and / or cooling surfaces located in a pumped circulation system.
  • the concentration of free monomers in the reaction mixture during the second activation step (step ⁇ ) is preferably> 0 to 100% by weight, more preferably> 0 to 50% by weight, most preferably> 0 to 20% by weight (based in each case on the Weight of the reaction mixture).
  • the concentration of free monomers in the reaction mixture during the reaction (step ⁇ ) is preferably> 0 to 40% by weight, more preferably> 0 to 25% by weight, most preferably> 0 to 15% by weight (in each case based on the weight the reaction mixture).
  • Another possible embodiment for the copolymerization (step ⁇ ) is characterized in that one or more H-functional starter substances are continuously metered into the reactor during the reaction.
  • the amount of H-functional starter substances which are added continuously to the reactor during the reaction is preferably at least 20 mol equivalents, more preferably from 70 to 95 mol equivalents (in each case based on the total amount on H-functional starter substances).
  • the amount of H-functional starter substances, which are added continuously during the reaction in the reactor preferably at least 80 mol equivalents, more preferably 95 to 99.99 mol equivalents (each based on the total amount of H functional starter substances).
  • the catalyst-starter mixture activated according to steps (a) and ( ⁇ ) is further reacted in the same reactor with the monomers and carbon dioxide.
  • the catalyst-starter mixture activated according to steps (a) and ( ⁇ ) in another reaction vessel is further reacted with the monomers and carbon dioxide.
  • the catalyst-starter mixture prepared according to step (a) is reacted with the monomers and carbon dioxide in another reaction vessel (for example a stirred tank, tubular reactor or loop reactor) according to steps ( ⁇ ) and ( ⁇ ).
  • the catalyst-starter mixture prepared according to step (a) or the catalyst-starter mixture activated according to steps (a) and ( ⁇ ) and optionally further initiators and the monomers and carbon dioxide are pumped continuously through a tube ,
  • the second activation step according to step (ß) in the first part of the tubular reactor and the terpolymerization according to step ( ⁇ ) in the second part of the tubular reactor are pumped continuously through a tube .
  • the molar ratios of the reactants vary depending on the desired polymer.
  • carbon dioxide is metered in its liquid or supercritical form in order to allow optimal miscibility of the components.
  • the carbon dioxide can be introduced into the reactor at the inlet of the reactor and / or via metering points which are arranged along the reactor.
  • a subset of the monomers may be introduced at the entrance of the reactor.
  • the residual amount of the monomers is preferably introduced into the reactor via a plurality of metering points which are arranged along the reactor.
  • mixing elements such as those marketed by the company Ehrfeld Mikrotechnik BTS GmbH, for better mixing of the reactants installed or mixer heat exchanger elements that improve the mixing and heat dissipation simultaneously. Preference is mixed by the mixing elements metered CO2 and the monomers with the reaction mixture.
  • Loop reactors may also be used to prepare multiple bond containing polyoxyalkylene polyols. These generally include reactors with internal and / or external material recycling (possibly with heat exchange surfaces arranged in the circulation), such as, for example, a jet loop reactor, jet loop reactor or venturi loop reactor, which can also be operated continuously, or a tubular reactor designed in a loop shape suitable devices for the circulation of the reaction mixture or a loop of several series-connected tubular reactors or a plurality of stirred stirred kettles connected in series.
  • the reaction apparatus in which step ( ⁇ ) is carried out can often be followed by another boiler or a tube ("dwell") in which residual concentrations of free monomers present after the reaction are consumed
  • Pressure in this downstream reactor at the same pressure as in the reactor in which the reaction step ( ⁇ ) is carried out, however, the pressure in the downstream reactor can also be chosen to be higher or lower.
  • the temperature in the downstream reactor is preferably from 10 to 150 ° C. and particularly preferably from 20 to 100 ° C.
  • the reaction mixture contains at the end of the after-reaction time or at room temperature . at the outlet of the downstream reactor vorz less than 0.05 Weight of monomers.
  • the after-reaction time or the residence time in the downstream reactor is preferably 10 minutes to 24 hours, more preferably 10 minutes to 3 hours.
  • the available polyoxyalkylene polyols containing multiple bonds preferably have an OH functionality (ie, average number of OH groups per molecule) of at least 0.8, preferably from 1 to 8, more preferably from 1 to 6, and most preferably from 2 to 4.
  • part of the OH groups is saturated with suitable reagents before the reaction of the polyoxyalkylene polyols to give polymers containing organooxysilyl end groups, so that the resulting polyoxyalkylene polyol has an OH functionality of less than 0.8, preferably less than 0.5, and particularly preferably less than 0.1.
  • Suitable reagents for the saturation of the OH functionalities are, for example, methylating agents.
  • the molecular weight of the resulting polybutylene polyols containing multiple bonds is preferably at least 400, more preferably 400 to 1,000,000 g / mol, and most preferably 500 to 60,000 g / mol.
  • Suitable H-functional starter substances (initiators) compounds with active for the alkoxylation H atoms can be used.
  • active groups having active H atoms are, for example, -OH, -NH 2 (primary amines), -NH- (secondary amines), -SH and -CO 2 H, preferably -OH and -NH 2 , more preferred is -OH.
  • one or more compounds can be selected from the group comprising monohydric or polyhydric alcohols, polyhydric amines, polyhydric thiols, amino alcohols, thioalcohols, hydroxyesters, polyetherpolyols, polyesterpolyols, polyesteretherpolyols, polyethercarbonatepolyols, polycarbonatepolyols, polycarbonates, polyethyleneimines, polyetheramines (eg so-called Jeffamine ® from Huntsman, such as D230, D400, D-2000, T403, T-3000, T-5000 or corresponding BASF products, such as polyetheramine D230, D400, D200, T403, T5000), polytetrahydrofurans (such as PolyTHF from BASF ®, such as PolyTHF ® 250, 650S, 1000, 1000S, 1400, 1800 2000), Polytetrahydrofuranamine (BASF product Polytetrahydrofuranamin 1700), Polyether
  • Alcohols, amines, thiols and carboxylic acids can be used as monofunctional starter substances.
  • monofunctional alcohols may find use: methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, tert-butanol, 3-buten-1-ol, 3-butyn-1-ol, 2-methyl 3-buten-2-ol, 2-methyl-3-butyn-2-ol, propargyl alcohol, 2-methyl-2-propanol, tert-butoxy-2-propanol, 1-pentanol, 2-pentanol, 3 Pentanol, 1-hexanol, 2-hexanol, 3-hexanol, 1-heptanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 3-octanol, 4-octanol, phenol, 2-hydroxybiphenyl, 3 Hydroxybi
  • Suitable monofunctional amines are: butylamine, tert-butylamine, pentylamine, hexylamine, aniline, aziridine, pyrrolidine, piperidine, morpholine.
  • monofunctional thiols can be used: ethanethiol, 1-propanethiol, 2-propanethiol, 1-butanethiol, 3-methyl-l-butanethiol, 2-butene-1-thiol, thiophenol.
  • monofunctional carboxylic acids may be mentioned: formic acid, acetic acid, propionic acid, butyric acid, fatty acids such as stearic acid, palmitic acid, oleic acid, linoleic acid, linolenic acid, benzoic acid, acrylic acid.
  • suitable polyhydric alcohols are, for example, dihydric alcohols (such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-propanediol, 1,4-butanediol, 1, 4-butenediol, 1,4-butynediol, neopentyl glycol, 1 , 5-pentanediol, methylpentanediols (such as 3-methyl-1,5-pentanediol), 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, bis (hydroxymethyl) - cyclohexanes (such as, for example, 1,4-bis (hydroxymethyl) cyclohexane), triethylene glycol, tetraethylene glycol, polyethylene glycols, dipropylene glycol, trip
  • the H-functional starter substances may also be selected from the class of polyether polyols, in particular those having a molecular weight M n in the range from 100 to 4000 g / mol. Preference is given to polyether polyols which are composed of repeating ethylene oxide and propylene oxide units, preferably with a proportion of 35 to 100% propylene oxide units, more preferably with a proportion of 50 to 100% propylene oxide units. These may be random copolymers, gradient copolymers, alternating or block copolymers of ethylene oxide and propylene oxide.
  • Suitable polyether polyols composed of repeating propylene oxide and / or ethylene oxide units are, for example Desmophen ® -, Acclaim ® -, Arcol ® -, Baycoll ® -, Bayfill ® -, Bayflex ® - Baygal ® -, PET ® - and polyether polyols from Bayer material Science AG (such.
  • Desmophen ® 3600Z Desmophen ® 1900U
  • Acclaim ® polyol 2200 Acclaim ® polyol 40001
  • Arcol ® polyol 1010 Arcol ® polyol 1030
  • Bayfill VPPU ® 0789, Baygal ® K55 PET ® 1004 polyether ® S180.
  • suitable homo-polyethylene oxides are the BASF SE example Pluriol ® E-marks suitable homo-polypropylene oxides such as the BASF SE Pluriol ® P-marks suitable mixed copolymers of ethylene oxide and propylene oxide such as the Pluronic ® PE or PLURIOL ® RPE Brands of BASF SE.
  • the H-functional starter substances can also be selected from the substance class of the polyesterpolyols, in particular those having a molecular weight M n in the range from 200 to 4500 g / mol.
  • polyester polyols at least difunctional polyesters can be used.
  • Polyester polyols preferably consist of alternating acid and alcohol units.
  • suitable acid components are succinic acid, maleic acid, maleic anhydride, adipic acid, phthalic anhydride, phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride or mixtures of said acids and / or anhydrides.
  • polycarbonate diols can be used as H-functional starter substances, in particular those having a molecular weight M n in the range of 150 to 4500 g / mol, preferably 500 to 2500 g / mol, for example by reaction of phosgene, dimethyl carbonate, diethyl carbonate or diphenyl carbonate and difunctional alcohols or polyester polyols or polyether polyols.
  • polycarbonates such as can be found in EP-A 1,359,177th example, as polycarbonate, the Desmophen ® C grades of Bayer MaterialScience AG are used, such as Desmophen ® C 1100 or Desmophen ® C 2200th
  • polyether carbonate polyols for example cardyon® polyols from Covestro
  • polycarbonate polyols for example Converge® polyols from Novomer / Saudi Aramco, NEOSPOL polyols from Repsol, etc.
  • polyetherestercarbonate polyols can be used as H-functional Starter substance can be used.
  • polyether carbonate polyols, polycarbonate polyols and / or polyetherestercarbonate polyols can be obtained by reacting alkylene oxides, preferably ethylene oxide, propylene oxide or mixtures thereof, optionally further co-monomers with CO 2 in the presence of a further H-functional starter compound and using catalysts.
  • catalysts include double metal cyanide (DMC) catalysts and / or metal complex catalysts based on, for example, the metals zinc and / or cobalt, such as zinc glutarate catalysts (described, for example, in MH Chisholm et al., Macromolecules 2002, 35, 6494).
  • polyethercarbonate polyols, polycarbonate polyols and / or polyetherestercarbonate polyols can be prepared beforehand in a separate reaction step.
  • the H-functional starter substances generally have an OH functionality (ie number of H atoms active per molecule for the polymerization) from 1 to 8, preferably from 2 to 6, and more preferably from 2 to 4.
  • the H-functional starter substances are used either individually or as a mixture of at least two H-functional starter substances.
  • Preferred H-functional starter substances are alcohols having a composition of the general formula
  • examples of alcohols according to formula (II) are ethylene glycol, 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol and 1,12-dodecanediol.
  • H-functional starter substances are neopentyl glycol, trimethylolpropane, glycerol, pentaerythritol, reaction products of the alcohols of the formula (II) with ⁇ -caprolactone, for example reaction products of trimethylolpropane with ⁇ - Caprolactone, reaction products of glycerol with ⁇ -caprolactone, as well as reaction products of pentaerythritol with ⁇ -caprolactone.
  • Further preferred water, diethylene glycol, dipropylene glycol, castor oil, sorbitol and polyether polyols composed of repeating polyalkylene oxide units are used as H-functional starter substances.
  • the H-functional starter substances are one or more compounds selected from the group consisting of ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 2-methylpropane-l, 3-diol, neopentyl glycol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, glycerol, trimethylolpropane, di- and trifunctional polyether polyols, wherein the polyether polyol from a di- or tri-H-functional starter substance and propylene oxide or a di- or tri-H-functional starter substance, propylene oxide and ethylene oxide is constructed.
  • the polyether polyols preferably have an OH functionality of 2 to 4 and a molecular weight M n in the range of 62 to 4500 g / mol and in particular a molecular weight M n in the range of 62 to 3000 g / mol.
  • Double metal cyanide (DMC) catalysts for use in the homopolymerization of alkylene oxides are in principle known in the art (see, eg, US-A 3 404 109, US-A 3 829 505, US-A 3 941 849 and US-A 5) 158 922).
  • DMC catalysts e.g. in US Pat. No. 5,470,813, EP-A 700 949, EP-A 743 093, EP-A 761 708, WO 97/40086, WO 98/16310 and WO 00/47649 have very high activity and make possible the preparation of polyoxyalkylenes at very low catalyst concentrations.
  • a typical example are the highly active DMC catalysts described in EP-A 700 949 which, in addition to a double metal cyanide compound (eg zinc hexacyanocobaltate (III)) and an organic complex ligand (eg tert-butanol), also have a polyether with a number-average molecular weight greater than 500 g / mol.
  • a double metal cyanide compound eg zinc hexacyanocobaltate (III)
  • an organic complex ligand eg tert-butanol
  • the DMC catalysts which can be used according to the invention are preferably obtained by (1.) initially treating an aqueous solution of a metal salt with the aqueous solution of a metal cyanide salt in the presence of one or more organic complexing ligands, e.g. an ether or alcohol,
  • the double metal cyanide compounds present in the DMC catalysts which can be used according to the invention are the reaction products of water-soluble metal salts and water-soluble metal cyanide salts.
  • an aqueous zinc chloride solution preferably in excess, based on the metal cyanide salt
  • potassium hexacyanocobaltate is mixed, and then dimethoxyethane (glyme) or tert-butanol (preferably in excess, based on zinc hexacyanocobaltate) is added to the suspension formed.
  • dimethoxyethane (glyme) or tert-butanol preferably in excess, based on zinc hexacyanocobaltate
  • Metal salts suitable for preparing the double metal cyanide compounds preferably have a composition of the general formula (III)
  • M is selected from the metal cations Zn 2+ , Fe 2+ , Ni 2+ , Mn 2+ , Co 2+ , Sr 2+ , Sn 2+ , Pb 2+ and, Cu 2+ , preferably M Zn 2+ , Fe 2+ , Co 2+ or Ni 2+ ,
  • X are one or more (ie different) anions, preferably an anion selected from the group of halides (ie fluoride, chloride, bromide, iodide), hydroxide, sulfate, carbonate, cyanate, thiocyanate, isocyanate, isothiocyanate, carboxylate, oxalate and nitrate ;
  • M is selected from the metal cations Fe 3+ , Al 3+ , Co 3+ and Cr 3+
  • X comprises one or more (ie different) anions, preferably an anion selected from the group of halides (ie fluoride, chloride, bromide, iodide), hydroxide, sulfate, carbonate, cyanate, thiocyanate isocyanate, isothiocyanate, carboxylate, oxalate and nitrate;
  • M is selected from the metal cations Mo 4+ , V 4+ and W 4+ ,
  • X comprises one or more (ie different) anions, preferably an anion selected from the group of halides (ie fluoride, chloride, bromide, iodide), hydroxide, sulfate, carbonate, cyanate, thiocyanate, isocyanate, isothiocyanate, carboxylate, oxalate and nitrate ;
  • M is selected from the metal cations Mo 6+ and W 6+ ,
  • X comprises one or more (i.e., different) anions, preferably anions selected from the group of halides (i.e., fluoride, chloride, bromide, iodide), hydroxide, sulfate, carbonate, cyanate, thiocyanate, isocyanate, isothiocyanate, carboxylate, oxalate and nitrate;
  • halides i.e., fluoride, chloride, bromide, iodide
  • hydroxide i.e., sulfate, carbonate, cyanate, thiocyanate, isocyanate, isothiocyanate, carboxylate, oxalate and nitrate
  • metal salts examples include zinc chloride, zinc bromide, zinc iodide, zinc acetate, zinc acetylacetonate, zinc benzoate, zinc nitrate, iron (II) sulfate, iron (II) bromide, iron (II) chloride, iron (III) chloride, cobalt (II) chloride, Cobalt (II) thiocyanate, nickel (II) chloride and nickel (II) nitrate. It is also possible to use mixtures of different metal salts.
  • Metal cyanide salts suitable for preparing the double metal cyanide compounds preferably have a composition of the general formula (VII)
  • M' is selected from one or more metal cations of the group consisting of Fe (II), Fe (III), Co (II), Co (III ), Cr (II), Cr (III), Mn (II), Mn (III), Ir (III), Ni (II), Rh (III), Ru (II), V (IV) and V (V ), M 'is preferably one or more metal cations of the group consisting of Co (II), Co (III), Fe (II), Fe (III), Cr (III), Ir (III) and Ni (II),
  • Y is selected from one or more metal cations of the group consisting of alkali metal (ie Li + , Na + , K + , Rb + ) and alkaline earth metal (ie Be 2+ , Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ )
  • alkali metal ie Li + , Na + , K + , Rb +
  • alkaline earth metal ie Be 2+ , Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+
  • A is selected from one or more of the group consisting of halides (i.e., fluoride, chloride, bromide, iodide), hydroxide, sulfate, carbonate, cyanate, thiocyanate, isocyanate, isothiocyanate, carboxylate, azide, oxalate or nitrate, and
  • a, b and c are integer numbers, with the values for a, b and c chosen to give the electroneutrality of the metal cyanide salt; a is preferably 1, 2, 3 or 4; b is preferably 4, 5 or 6; c preferably has the value 0.
  • Suitable metal cyanide salts are sodium hexacyanocobaltate (III), potassium hexacyanocapaltate (III), potassium hexacyanoferrate (II), potassium hexacyanoferrate (III), calcium hexacyanocobaltate (III) and lithium hexacyanocobaltate (III).
  • Preferred double metal cyanide compounds which are present in the DMC catalysts which can be used according to the invention are compounds having compositions of the general formula (VIII)
  • x, x ', y and z are integers and chosen so that the electron neutrality of the double metal cyanide compound is given.
  • M Zn (II), Fe (II), Co (II) or Ni (II) and
  • M ' Co (III), Fe (III), Cr (III) or Ir (III).
  • suitable double metal cyanide compounds a) are zinc hexacyanocobaltate (III), zinc hexacyanoiridate (III), zinc hexacyanoferrate (III) and cobalt (II) hexacyanocobaltate (III).
  • suitable double metal cyanide compounds can be found, for example, in US Pat. No. 5,158,922 (column 8, lines 29-66).
  • Zinc hexacyanocobaltate (III) can be used with particular preference.
  • the organic complexing ligands which can be added in the preparation of the DMC catalysts are described, for example, in US Pat. No.
  • Preferred organic complex ligands are alcohols, aldehydes, ketones, ethers, esters, amides, ureas, nitriles, sulfides and mixtures thereof.
  • Particularly preferred organic complex ligands are aliphatic ethers (such as dimethoxyethane), water-soluble aliphatic alcohols (such as ethanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, 2-methyl-3-buten-2-ol and 2-methyl-3-butyn-2-ol), compounds containing both aliphatic or cycloaliphatic ether groups as well as aliphatic hydroxyl groups (such as ethylene glycol mono-tert-butyl ether, diethylene glycol mono-tert-butyl ether, tripropylene glycol mono-methyl ether and 3-methyl-3-oxetane-methanol).
  • Highly preferred organic complexing ligands are selected from one or more compounds of the group consisting of dimethoxyethane, tert-butanol, 2-methyl-3-buten-2-ol, 2-methyl-3-butyn-2-ol, ethylene glycol mono-tert-butyl butyl ether and 3-methyl-3-oxetan-methanol.
  • one or more complex-forming component (s) from the compound classes of polyethers, polyesters, polycarbonates, polyalkylene glycol sorbitan esters, polyalkylene glycol glycidyl ethers, polyacrylamide, poly (acrylamide-co-acrylic acid), polyacrylic acid, poly (acrylic acid) are used in the preparation of the DMC catalysts which can be used according to the invention.
  • polyacrylonitrile polyalkyl acrylates, polyalkyl methacrylates, polyvinyl methyl ether, polyvinyl ethyl ether, polyvinyl acetate, polyvinyl alcohol, poly-N-vinylpyrrolidone, poly (N-vinylpyrrolidone-co-acrylic acid), polyvinyl methyl ketone, poly (4-vinylphenol), poly (acrylic acid -co-styrene), oxazoline polymers, polyalkyleneimines, maleic and maleic anhydride copolymers, hydroxyethylcellulose and polyacetals, or the glycidyl ethers, glycosides, carboxylic esters of polyhydric alcohols, bile acids or their salts, esters or amides, cyclodextrins, phosphorus compounds, ⁇ , ⁇ -unsaturated carboxylic esters or ionic Surface bz w.,
  • the aqueous solutions of the metal salt are preferably used in the first step in a stoichiometric excess (at least 50 mol%) based on the metal cyanide salt.
  • the metal cyanide salt eg, potassium hexacyanocobaltate
  • the organic complex ligand eg, tert-butanol
  • the organic complex ligand can be present in the aqueous solution of the metal salt and / or the metal cyanide salt, or it is added directly to the suspension obtained after precipitation of the double metal cyanide compound. It has proven to be advantageous to mix the aqueous solutions of the metal salt and the metal cyanide salt, and the organic complex ligand with vigorous stirring.
  • the suspension formed in the first step is subsequently treated with a further complex-forming component.
  • the complex-forming component is preferably used in a mixture with water and organic complex ligands.
  • a preferred method of carrying out the first step i.e., the preparation of the suspension
  • the isolation of the solid (i.e., the precursor of the catalyst) from the suspension can be accomplished by known techniques such as centrifugation or filtration.
  • the isolated solid is then washed in a third process step with an aqueous solution of the organic complex ligand (e.g., by resuspension and subsequent reisolation by filtration or centrifugation).
  • an aqueous solution of the organic complex ligand e.g., by resuspension and subsequent reisolation by filtration or centrifugation.
  • water-soluble by-products such as potassium chloride
  • the amount of the organic complex ligand in the aqueous washing solution is between 40 and 80% by weight, based on the total solution.
  • the aqueous washing solution is added to a further complex-forming component, preferably in the range between 0.5 and 5 wt .-%, based on the total solution.
  • aqueous solution of the unsaturated alcohol washed (eg by resuspension and subsequent reisolation by filtration or centrifugation), to remove in this way, for example, water-soluble by-products, such as potassium chloride, from the inventively employable catalyst.
  • the amount of the unsaturated alcohol in the aqueous washing solution is between 40 and 80% by weight, based on the total solution of the first washing step.
  • either the first washing step is repeated once or several times, preferably once to three times, or preferably a nonaqueous solution, such as a mixture or solution of unsaturated alcohol and further complexing component (preferably in Range between 0.5 and 5 wt.%, Based on the total amount of the washing solution of the step (3.-2)), used as a washing solution and the solid washed with it once or several times, preferably once to three times.
  • a nonaqueous solution such as a mixture or solution of unsaturated alcohol and further complexing component (preferably in Range between 0.5 and 5 wt.%, Based on the total amount of the washing solution of the step (3.-2)
  • the isolated and optionally washed solid can then, optionally after pulverization, at temperatures of 20 - 100 ° C and at pressures of 0.1 mbar to atmospheric pressure (1013 mbar) are dried.
  • a preferred process for the isolation of the DMC catalysts which can be used according to the invention from the suspension by filtration, filter cake washing and drying is described in WO-A 01/80994.
  • the unsaturated comonomers may be distributed randomly or in blocks in the multiple bond polyoxyalkylene polyols. Gradient polymers can also be used.
  • the unsaturated, cyclic anhydrides added in step (.gamma.) Can be selected from the group comprising 4-cyclohexene-1,2-diacid anhydride, 4-methyl-4-cyclohexene-1,2-diacid anhydride, 5.6- Norbornene-2,3-diacid anhydride, allyl-5,6-norbornene-2,3-diacid anhydride, dodecenyl succinic anhydride, tetradecenyl succinic anhydride, hexadecenyl succinic anhydride or octadecenyl succinic anhydride.
  • the at least one carbon-carbon multi-bond-containing monomer is selected from at least one of the monomers of one or more of the
  • Ri to R3 are independently H, halogen, substituted or unsubstituted C 1 -C 22 alkyl, substituted or unsubstituted C 6 -C 12 aryl
  • R 1 to R independently of one another are H, halogen, substituted or unsubstituted C 1 -C 22 -alkyl, substituted or unsubstituted C 6 -C 12 -aryl,
  • R14 independently of one another represents saturated or unsaturated C 1 -C 22 -alkyl, C 6 -C 14 -aryl, C 7 -C 14 -aralkyl, C 7 -C 14 -alkylaryl.
  • the at least one carbon-carbon polyfunctional monomer is selected from one or more of the groups consisting of
  • the polyether carbonate polyol containing multiple bonds contains a CO 2 content of from 3 to 44% by weight, preferably from 5 to 25% by weight.
  • a CO 2 content of from 3 to 44% by weight, preferably from 5 to 25% by weight.
  • a polyol is used as the H-functional starter substance.
  • a polyoxyalkylene polyol containing carbon-carbon double bonds more preferably a polyether carbonate polyol containing polycarboxylic polycarboxylate, is used.
  • the multiple-bond alkylene oxides added in step ( ⁇ ) can be selected from the group comprising allyl glycidyl ether, vinylcyclohexene oxide, cyclooctadiene monoepoxide, cyclododecatriene monoepoxide, butadiene monoepoxide,
  • Isoprenmonoepoxid and / or lime oxide be selected.
  • the polyoxyalkylene polyol containing multiple bonds may have a proportion of unsaturated comonomers of greater than or equal to 0.1 mol and less than or equal to 50 mol.
  • the provision of a defined number of functionalization possibilities, which lies in the range indicated above, has proved to be particularly advantageous. This means that in the polyoxyalkylene polyol used according to the invention, about every 2,000 to every 1,000th monomer unit within the polymer chain carries an unsaturated group and consequently can react with free radicals in the course of further reaction.
  • the proportion of unsaturated comonomers in the polyoxyalkylene polyols may further preferably be greater than or equal to 0.5 mol% and less than or equal to 15 mol%, in particular greater than or equal to 1.0 mol% and less than or equal to 10 mol% be.
  • At least one compound is selected from one or more of the groups consisting of trimethoxysilane, methyltrimethoxysilane, phenyltrimethoxysilane, Triethoxysilane, methyltriethoxysilane, methyltripropoxysilane hexadecyltrimethoxysilane, Octodecyltrimethoxysilan, n-octyltrimethoxysilane, n-octyltriethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, N-butyltrimethoxysilane, n-butyltriethoxysilane, iso-butyltriethoxysilane, 3- chloropropyltrimethoxysilane, 3-chloropropyltriethoxysilane, 3-
  • Tetramethoxysilane, tetraethoxysilane and tetraisopropoxysilane Tetramethoxysilane, tetraethoxysilane and tetraisopropoxysilane.
  • the organooxysilyl compound is at least one compound selected from the groups consisting of trimethoxysilane, triethoxysilane, tetramethoxysilane, tetraethoxysilane and tetraisopropoxysilane.
  • this compound is used in excess, for example in a molar ratio of> 10: 1 to ⁇ 50: 1 based on the OH groups in the polyol.
  • the catalyst (A) used in step A) is selected from the group consisting of:
  • R15 and R16 are independently hydrogen, alkyl or aryl
  • R15 and R16 together with the N atom carrying them form an aliphatic, unsaturated or aromatic heterocycle; n is an integer from 1 to
  • R17 is hydrogen, alkyl or aryl
  • R17 is - (CH 2) x -N (R 18) (R 19) where:
  • R18 and R19 are independently hydrogen, alkyl or aryl
  • R20 is hydrogen, alkyl or aryl
  • R21 and R22 are independently hydrogen, alkyl or aryl; m and o are independently an integer from 1 to 10; and / or: (c) diazabicyclo [2.2.2] octane, diazabicyclo [5.4.0] undec-7-ene, dialkylbenzylamine, dimethylpiperazine, 2,2'-dimorpholinyl diethyl ether, 4-dimethylaminopyridine and pyridine.
  • the catalyst (A) used in step A) is selected from the group consisting of diazabicyclo [2.2.2] octane, diazabicyclo [5.4.0] undec-7-ene and 4-dimethylaminopyridine.
  • the present invention further relates to a polymer containing organooxysilyl end groups, obtainable by a process according to the invention.
  • This polymer preferably has a number-average molecular weight M n of> 500 g / mol to ⁇ 100 000 g / mol, more preferably> 1000 g / mol to ⁇ 50000 g / mol and very particularly preferably of> 5000 g / mol to ⁇ 8000 g / mol.
  • the number average M n and weight average molecular weight M w can be determined by gel permeation chromatography (GPC).
  • the temperature may be> 75 ° C to ⁇ 180 ° C and preferably> 80 ° C to ⁇ 130 ° C.
  • the catalyst (B) used in step B) is selected from the group consisting of
  • R15 and R16 are independently hydrogen, alkyl or aryl
  • R15 and R16 together with the N atom carrying them form an aliphatic, unsaturated or aromatic heterocycle; n is an integer from 1 to 10;
  • R17 is hydrogen, alkyl or aryl
  • R17 is - (CH 2) x -N (R 18) (R 19) where:
  • R18 and R19 are independently hydrogen, alkyl or aryl
  • R18 and R19 together with the N-atom carrying them form an aliphatic, unsaturated or aromatic heterocycle; x is an integer of 1 to 10;
  • R20 is hydrogen, alkyl or aryl
  • R21 and R22 are independently hydrogen, alkyl or aryl; m and o are independently an integer from 1 to 10; and or:
  • step B) diazabicyclo [2.2.2] octane, diazabicyclo [5.4.0] undec-7-ene, dialkylbenzylamine, dimethylpiperazine, 2,2'-dimorpholinyl diethyl ether, 4-dimethylaminopyridine and pyridine.
  • the catalyst (B) used in step B) is selected from the group consisting of diazabicyclo [2.2.2] octane, diazabicyclo [5.4.0] undec-7-ene and 4-dimethylaminopyridine.
  • the catalyst (A) used in step A) is identical to the catalyst (B) used in step B) and is selected from the group consisting of diazabicyclo [2.2.2] octane, diazabicyclo [5.4.0 ] undec-7-ene and 4-dimethylaminopyridine.
  • the mass ratio of the catalyst (A) used in step A) is 1% by weight to 100% by weight, preferably 1% by weight to 20% by weight and more preferably 1% by weight to 10% by weight. based on the mass of the carbon-carbon multiple bonds containing polyoxyalkylene polyol, organooxysilyl compound and the catalyst (A)
  • the mass ratio of the catalyst (B) used in step B) is 1% by weight to 100% by weight, preferably 1% by weight to 20% by weight and more preferably 1% by weight to 10% by weight. based on the mass of the organooxysilyl-terminated polymer and the catalyst (B).
  • the inventors have found that the presence of water is not necessarily required for the initiation of the condensation reaction, that is for the formation of Si-O-Si bridges between the functionalized polyol molecules, and above a certain amount due to the hydrolysis may even be detrimental to organooxysilyl bonds. Therefore, it is preferred that in step B) the mixture comprising all components which is heated has a water content of ⁇ 100 ppm (preferably ⁇ 50 ppm).
  • step B) in the absence of an organooxysilyl compound of the formula Si (X) n (Ro) 4-n, wherein: X is independently C 1 -C 8 alkoxy, C 7 -C 20 aralkoxy , C6-C14-Aroxy,
  • Ro is independently a saturated or unsaturated C 1 -C 22 alkyl, C 6 -C 14 aryl, C 7 -C 14 aralkyl, C 7 -C 14 alkylaryl and n is 2, 3 or 4.
  • the organooxysilyl-terminated polymer to be used is purified prior to step B) and freed, in particular, from organooxysilyl compounds which might interfere with the condensation reaction in step B.
  • "Absence" means that the organooxysilyl compound is present at most in technically unavoidable traces, for example in the 400 MHz NMR spectrum of a sample can no longer be detected.
  • the invention also relates to an elastomeric precursor obtainable by a process according to the invention.
  • MeSi (OAc) 3 methyl triacetoxy silane, trifunctional organooxysilyl compound (Sigma-Aldrich,
  • BinDec Bismuth neodecanoate (Sigma-Aldrich Chemie GmbH, k.a.)
  • the molecular weight increase of functionalized polyols by polycondensation was investigated on a Physica MCR 501 Rheometer from Anton Paar equipped with a D-PP15 measuring system (plate-plate configuration with a plate spacing of 1 mm).
  • One sample (0.5 g) of the functionalized polyol was mixed on the rheometer plate of the rheometer with catalyst and at 80 ° C and a dynamic oscillation of 1Hz a 10% Subject to shear.
  • IR spectra were recorded on a Bruker spectrometer (Alpha P FT-IR).
  • a polyoxyalkylene polyol containing suitable carbon-carbon double bonds in the process according to the invention for the functionalization with organooxysilyl compound can be prepared by the following process:
  • the temperature was readjusted to 100 ° C and maintained during the subsequent steps, the pressure in the pressure reactor by metering in of CO2 by means of a mass flow controller at 15 bar.
  • An additional 355 g of a monomer mixture (14% by weight maleic anhydride dissolved in propylene oxide) were metered in via an HPLC pump (3 ml / min) with stirring, the reaction mixture also being stirred (800 rpm). After the end of the addition of monomer mixture (14% by weight maleic anhydride dissolved in propylene oxide), the reaction mixture was stirred at 100 ° C. for a further 60 minutes.
  • Step A In a 100 mL two-necked flask, polyol A (10.0 g) and methyltrimethoxysilane (20.0 g) were combined. The flask was then fitted with a reflux condenser heated to 110 ° C. The mixture was brought to 110 ° C. with stirring (300 rpm) and provided with DBU (1% by weight, 100 mg). Subsequently, the reaction mixture was stirred for a further 2 hours at 110.degree. After completion of the reaction, the unreacted methyltrimethoxysilane was removed under reduced pressure. The product was analyzed by ⁇ -NMR spectroscopy and IR spectroscopy and the functionalization of the polyol was confirmed.
  • Step A In a flask, 9.0 g of Polyol-A and DBU (1 part by weight, 90 mg) were mixed. The mixture was brought to reaction temperature (110 ° C) with stirring (300 rpm). Subsequently, water (400 mg) was added to the reaction mixture. The reaction mixture was stirred for 2 h. After completion of the reaction, the volatiles were removed under reduced pressure.
  • Step B In a flask, 9.0 g of Polyol-A and DBU (1 part by weight, 90 mg) were mixed. The mixture was brought to reaction temperature (110 ° C) with stirring (300 rpm). Subsequently, water (400 mg) was added to the reaction mixture. The reaction mixture was stirred for 2 h. After completion of the reaction, the volatiles were removed under reduced pressure. Step B:
  • Comparative Examples 1 and 2 show that in the case of functionalization with mono- or bifunctional organosilyl groups no crosslinking of the corresponding products can be achieved.
  • Examples 6-9 and 11 show that the presence of an amine-based catalyst is the prerequisite for the success of both Step A and Step B.
  • the compounds listed in Comparative Example 7-10 showed no catalytic activity.
  • the functionalized and unsaturated polyoxyalkylene polyol prepared in Example 5 was used for this condensation test.
  • 0.5 g of the functionalized unsaturated polyoxyalkylene polyol were mixed with DBU (2% by weight, 10 mg) and used on the rheometer. The gel point was observed after 13.7 min. The memory module G 'was noted after one hour.
  • the functionalized and unsaturated polyoxyalkylene polyol prepared in Example 5 was used for this condensation test.
  • 0.5 g of the functionalized unsaturated polyoxyalkylene polyol were mixed with DBU (4% by weight, 20 mg) and used on the rheometer. The gel point was observed after 7.0 min. The memory module G 'was noted after one hour.
  • the functionalized and unsaturated polyoxyalkylene polyol prepared in Example 5 was used for this condensation test.
  • Table 2 Overview of the results of the preparation of the elastomeric precursor under different catalyst concentration of DBU in step B
  • Examples 5, 12-14, and Comparative Example 11 show not only that the presence of amine-based catalysts is essential, but also that the concentration of those same catalysts influence the course of the reaction and the properties of the resulting product.

Abstract

La présente invention concerne un procédé de préparation d'un polymère comportant des groupes terminaux organooxysilyle, le procédé comprenant d'abord la réaction d'un polyol de polyoxyalkylène comportant des liaisons multiples carbone-carbone avec un composé organooxysilyle de formule Si(X)n(R)4-n en présence d'un catalyseur, X désignant indépendamment les uns des autres, un groupe alcoxy en C1-C8, aralcoxy en C7-C20, aroxy en C6-C14, alkylaroxy en C7-C20, acyloxy en C1-C20 ; R désignant, indépendamment les uns des autres, un groupe alkyle en C1-C22 saturé ou insaturé, aryle en C6-C14, aralkyle en C7-C14, alkylaryle en C7-C14 et n désignant 2, 3 ou 4. L'invention concerne en outre un procédé de préparation d'un précurseur d'élastomère à partir d'un polymère comportant des groupes terminaux organooxysilyle ainsi que les produits pouvant être obtenus selon ce procédé.
EP18772819.1A 2017-09-28 2018-09-26 Procédé de préparation d'un polymère comportant des liaisons multiples en tant que précurseur d'élastomère Withdrawn EP3688056A1 (fr)

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PCT/EP2018/076051 WO2019063582A1 (fr) 2017-09-28 2018-09-26 Procédé de préparation d'un polymère comportant des liaisons multiples en tant que précurseur d'élastomère

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