EP2197888A2 - Réactifs raft substitués par un silane, et polymères réticulables avec un silane - Google Patents

Réactifs raft substitués par un silane, et polymères réticulables avec un silane

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Publication number
EP2197888A2
EP2197888A2 EP08803927A EP08803927A EP2197888A2 EP 2197888 A2 EP2197888 A2 EP 2197888A2 EP 08803927 A EP08803927 A EP 08803927A EP 08803927 A EP08803927 A EP 08803927A EP 2197888 A2 EP2197888 A2 EP 2197888A2
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EP
European Patent Office
Prior art keywords
silane
substituted
optionally
vinyl
raft
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.)
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EP08803927A
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German (de)
English (en)
Inventor
Oliver Minge
Peter Ball
Sabine Delica
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Wacker Chemie AG
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Wacker Chemie AG
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Publication date
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Publication of EP2197888A2 publication Critical patent/EP2197888A2/fr
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
    • C09K3/1018—Macromolecular compounds having one or more carbon-to-silicon linkages
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
    • C07F7/1804—Compounds having Si-O-C linkages
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/42—Introducing metal atoms or metal-containing groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
    • C08L101/10—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing hydrolysable silane groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2438/00—Living radical polymerisation
    • C08F2438/03—Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX]

Definitions

  • the present invention relates to silane-substituted RAFT reagents and their use as an additional component in free-radically initiated polymerizations of ethylenically unsaturated monomers and the silane-crosslinkable polymers obtainable thereby and their use as polymeric binders, for example in formulations for paints, adhesives or sealants.
  • polymeric binders are used with different compositions and in different formulations.
  • inert solvents such as ethyl acetate or butyl acetate
  • reactive diluents ie solvents
  • the use of such formulations leads to a stress on the working environment with organic solvents, which requires corresponding safety precautions, for example local exhaust systems, which in turn are associated with costs.
  • solvent-based formulations Appropriate aqueous systems are often unsuitable because such systems in their performance characteristics, such as water resistance, hydrophobicity or gloss, drop significantly compared to solvent-based formulations.
  • polymeric binders with crosslinkable groups usually crosslink with film, so that paints, adhesives or sealants having the desired hardness, insolubility or good adhesion are obtained.
  • Suitable crosslinkable groups are, for example, silanes substituted by hydrolyzable radicals, for example silanes substituted by alkoxy radicals.
  • the crosslinking of such silane-crosslinking polymers can be carried out in the presence of moisture by hydrolysis of the hydrolyzable groups and subsequent condensation to form siloxane bridges.
  • silane-crosslinkable polymers as polymeric binders is known, for example, from US-A 3706697, US-A 4526930, EP-A 1153979, DE-OS 2148457, EP-A 327376, GB 1407827, DE-A 10140131 or EP-A A 1308468 known, wherein the crosslinkable silane groups undefined in the embodiments disclosed therein, ie at any position to which polymeric binders are bound.
  • silane-crosslinkable polymers in which the crosslinkable silane groups are bonded to the polymer at specific, defined positions are advantageous, as is the case, for example, with silane-terminated polymers in which one or both ends of a polymer chain carry crosslinkable silane groups.
  • silane-terminated polymers they form in the course of their crosslinking. more uniform and defined networks, which has an advantageous effect on the application properties and, for example, causes greater elasticity, stability or improved adhesion.
  • Silane-terminated polymers are described, for example, in WO-A 06122684, WO-A 05100482, WO-A 05054390, US-A-A
  • silane-crosslinkable polymers which are terminated in the course of their preparation by free-radically initiated polymerization of ethylenically unsaturated monomers with silane groups at the polymer chain ends.
  • the silane-crosslinkable polymers should be suitable as polymeric binders for the production of, for example, solvent-free room temperature low-viscosity 100% systems for adhesive, sealant or lacquer applications.
  • this object has been achieved by free-radically initiated polymerization of ethylenically unsaturated monomers in the presence of silane-substituted RAFT reagents.
  • RAFT stands for "reversible addition-fragmentation chain transfer.”
  • RAFT reagents are species that can be reversed. Add sibel to polymerization radical species while simultaneously releasing another polymerization radical species or generate an intermediate, which in turn is able to release a polymerization radical species.
  • RAFT reagents contain RAFT-reactive groups, such as thiocarbonylthio compounds, which carry optionally substituted hydrocarbon radicals. Performing radical-initiated polymerization reactions in the presence of RAFT reagents (RAFT reactions) causes the chains of the polymers thus obtainable to be substantially terminated with residues derived from RAFT reagents.
  • RAFT reactions are thus controlled radical-initiated polymerization reactions of ethylenically unsaturated monomers.
  • RAFT reactions as well as RAFT-reactive groups are known to the person skilled in the art, for example, from G. Moad, E. Rizzardo, Aust. J. Chem. 2005, 58, 379-410.
  • silane-substituted RAFT reagents are not described. Accordingly, it is also not described whether silane-substituted RAFT reagents are suitable for introducing silane functionalities into polymers.
  • An object of the invention are silane-substituted RAFT reagents of the general formulas
  • R 1 can be radicals as defined above.
  • Preferred radicals R 1 and R 2 of the formulas (Ia), (Ib) and (Ic) are methyl, ethyl, phenyl or cyclohexyl.
  • Preferred radicals R 3 are methyl, ethyl, phenyl, cyclohexyl, -CH 2 -CO-OR 1 (acyl ester) and -CH (CH 3 ) CO-OR 1 (propionyl ester), wherein R 1 represents the radicals indicated above.
  • Particularly preferred radicals R are methyl, ethyl, acylmethyl ester, acyl ethyl ester, propionyl methyl ester and propionyl ethyl ester.
  • Preferred values for n are 0 or 1.
  • Dioxyalkylen wherein the respective alkylene units are each independently preferably linear or cyclic, divalent, optionally substituted by one or more radicals R 1 substituted C] _C] _ Q hydrocarbon radicals and R 1 and R 2 are radicals corresponding to the above Definitions stand.
  • n 0
  • R 2 is selected from the group comprising methyl and ethyl
  • R 3 is selected from the group comprising methyl, ethyl, acylmethyl ester, propionyl methyl ester, acyl ethyl ester and propionyl ethyl ester
  • R f N-cyclohexyl-dithio
  • silane-substituted RAFT reagents are accessible using standard silane-substituted synthetic building blocks according to standard methods of organic synthetic chemistry; ie the silane-substituted RAFT reagents can be prepared starting from corresponding silane-substituted synthesis units in an analogous manner as RAFT reagents which are not substituted with silanes. Corresponding syntheses of RAFT reagents which are not substituted with silanes are described, for example, in G. Moad, E. Rizzardo, Aust. J. Chem. 2005, 58, 379-410.
  • the silane-substituted RAFT reagents can be used as additional components in free-radically initiated polymerizations of ethylenically unsaturated monomers.
  • this WEI se terminated polymers are formed by the RAFT reaction mechanism with vernetzba ⁇ ren silane groups.
  • the silane-substituted RAFT reagents can be used in pure form or in the form of solutions in organic solvents.
  • Another object of the invention are silane-crosslinkable
  • Preferred ethylenically unsaturated monomers A) from the group of acrylic esters or methacrylic esters are esters of non-esterified branched or branched alcohols having 1 to 15 carbon atoms.
  • Particularly preferred methacrylic acid esters or acrylates are methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, n-butyl acrylate, n-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, t-butyl acrylate, t-butyl methacrylate, 2-ethylhexyl acrylate and n-butyl methacrylate.
  • bornyl acrylate Most preferred are methyl acrylate, methyl methacrylate, n-butyl acrylate, n-butyl methacrylate, iso-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate and norbornyl acrylate.
  • Preferred vinyl esters are vinyl esters of carboxylic acid radicals having 1 to 15 carbon atoms. Particular preference is given to vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, 1-methylvinyl acetate, vinyl pivalate and vinyl esters of C-branched monocarboxylic acids having 9 to 11 C atoms, for example VeoVa9® or VeoValO® (Firma Resolution). Most preferred are vinyl acetate, vinyl pivalate, vinyl laurate and vinyl esters of CC-branched monocarboxylic acids having 9 to 11 carbon atoms.
  • Preferred vinylaromatics are styrene, alpha-methylstyrene, the isomeric vinyltoluenes and vinylxylenes and divinylbenzenes. Particularly preferred is styrene.
  • a preferred vinyl ether is methyl vinyl ether.
  • Preferred olefins are ethene, propene, 1-alkylethenes and polyunsaturated alkenes.
  • Preferred dienes are 1,3-butadiene and isoprene. Of the olefins and dienes, ethene and 1,3-butadiene are particularly preferred.
  • a preferred vinyl halide is vinyl chloride.
  • monomers A) selected from the group consisting of vinyl acetate, vinyl esters of CC-branched monocarboxylic acids having 9 to 11 carbon atoms, vinyl chloride, ethylene, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate , n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, styrene and 1, 3-butadiene.
  • auxiliary monomers B such as preferably n-butyl acrylate and 2-ethylhexyl acrylate and / or methyl methacrylate; Styrene and one or more monomers selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate; Vinyl acetate and one or more monomers selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate and optionally ethylene; 1,3-butadiene and styrene and / or methyl methacrylate.
  • auxiliary monomers B can be copolymerized.
  • auxiliary monomers B from 0.5 to 2.5% by weight are used per auxiliary monomer B).
  • the sum of all auxiliary monomers B) can make up to 20% by weight of the monomer mixture from A) and B), preferably less than 10% by weight of auxiliary monomers B) in total.
  • auxiliary monomers B) are ethylenically unsaturated mono- and dicarboxylic acids, preferably acrylic acid, methacrylic acid, fumaric acid and maleic acid; ethylenically unsaturated carboxylic acid amides and nitriles, preferably acrylamide and acrylonitrile; Mono- and diesters of fumaric acid and maleic acid, such as the diethyl and diisopropyl esters and also maleic anhydride, ethylenically unsaturated sulfonic acids or salts thereof, preferably vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid.
  • mono- and dicarboxylic acids preferably acrylic acid, methacrylic acid, fumaric acid and maleic acid
  • carboxylic acid amides and nitriles preferably acrylamide and acrylonitrile
  • Mono- and diesters of fumaric acid and maleic acid such as the diethyl and diisoprop
  • precrosslinking comonomers such as multiply ethylenically unsaturated comonomers, for example divinyl adipate, diallyl maleate, allyl methacrylate or triallyl cyanurate, or post-crosslinking comonomers, for example acrylamidoglycolic acid (AGA), methyl acrylamido-midoglycolic acid methyl ester (MAGME), N-methylolacrylamide (NMA), N- Methylolmethacrylamid, N-methylolallyl carbamate, alkyl ethers such as isobutoxy ether or esters of N-methylolacrylamide, N-methylolmethacrylamide and N-Methylolallylcarbamats.
  • epoxide-functional ethylenically unsaturated for example divinyl adipate, diallyl maleate, allyl methacrylate or triallyl cyanurate
  • Comonomers such as glycidyl methacrylate and glycidyl acrylate. Also mentioned are ethylenically unsaturated monomers having hydroxyl or CO groups, for example methacrylic acid and acrylic acid hydroxides. xyalkyl esters such as hydroxyethyl, hydroxypropyl or hydroxybutyl acrylate or methacrylate and also compounds such as diacetonacylamide and acetylacetoxyethyl acrylate or methacrylate.
  • copolymerizable ethylenically unsaturated silanes may be mentioned, for example vinylsilanes such as vinyltrimethoxysilane or vinyltriethoxysilane or (meth) acrylsilanes, such as, for example, GEOSIL® GF-31 (methacryloxypropyltrimethoxysilane), GENIOSIL® XL-33 (methacryloxymethyltrimethoxysilane), GENIOSIL® XL-32 (cf.
  • Methacryloxymethyldimethylmethoxysilane Methacryloxymethyldimethylmethoxysilane
  • GENIOSIL® XL-34 methacryloxymethylmethyldimethoxysilane
  • GENIOSIL® XL-36 methacryloxymethyltriethoxysilane
  • silane-substituted RAFT reagents and the monomers A) and optionally the monomers B) can be used in the polymerization in any ratio.
  • the silane-crosslinkable polymers have at least one polymer chain end terminated with crosslinkable silane groups.
  • RAFT reagents of the formula (Ia) preference is given to
  • Silane-crosslinkable polymers having a polymer chain end terminated by a crosslinkable silane group are obtained.
  • RAFT reagents of the formula (Ib) or (Ic) it is preferred to obtain silane-crosslinkable polymers which have two polymer chain ends terminated with crosslinkable silane groups.
  • the polymer chain ends of the silane-crosslinkable polymers are, for example, with the radicals R x n (OR 2) 3 - n Si-L 1 -R f -, R ⁇ (OR 2 J 3 - n Si-L 1 -, -R f -L 2 -Si (OR 2 ) 3 -I 1 R 1 I 1 , -L 2 -Si (OR 2 ) 3 -I 1 R 1 I 1 , -R f -L 2 -R f -L 3 -Si (OR 2 ) 3-I 1 R 1 H, -L 2 -R f -L 3 -Si (OR 2 J 3 -I 1 R 1 H, -R f -L 3 -Si (OR 2 ) 3 -I 1 R 1 I 1 or -L 3 - Si (OR 2 ) 3 -I 1 R 1 I 1 terminates, depending on which of the silane-substituted RAFT
  • the selection of the monomers A) and the selection of databasesantei- Ie of the individual monomers A) and optionally the monomers B) is preferably carried out so that in general a glass transition temperature Tg of £ 60 ° C, preferably from -50 0 C to +60 0 C results.
  • the glass transition temperature Tg of the polymers can be in known manner by differential scanning calorimetry (DSC) are determined.
  • Tgn the glass transition temperature in Kelvin of the homopolymer of the monomer n. Tg values for homopolymers are listed in Polymer Handbook 2nd Edition, J. Wiley & Sons, New York (1975).
  • silane-crosslinkable polymers can also be present in blends with other polymers.
  • blends with other polymers preferably additionally comprise silicones or homopolymers or copolymers based on monomers selected from the group comprising vinyl esters, acrylates, methacrylates, acrylonitrile, vinyl chloride, vinyl ethers, olefins and dienes, and also polyesters, polyamides, Polyethers or polyurethanes.
  • Particularly preferred blends contain, in addition to the silane-crosslinkable polymers as further polymers silicones, vinyl chloride polymers, methacrylic acid polymers, aryl ester polymers, styrene polymers, vinyl acetate-vinyl chloride copolymers or ethylene-vinyl acetate copolymers. These other polyme ⁇ risate are also preferably silane cross-linkable.
  • Another object of the invention is a process for preparing the silane-crosslinkable polymers by free-radically initiated polymerization of
  • A) ethylenically unsaturated monomers selected from the group comprising (meth) acrylic esters, vinyl esters, vinyl aromatics,
  • silane-crosslinkable polymers are obtainable by the substance, suspension, emulsion or solution polymerization process.
  • Transfer constants are rate constants that indicate the rate of transfer of a growing polymer chain to, for example, the solvent. Transfer constants are listed, for example, in Polymer Handbook, J. Wiley, New York, 1979. Particularly preferred organic solvents have transfer constants to the monomer to be polymerized by a factor of 2xlO 4, most preferably by a factor Ixio 4 are relatively small at 40 0 C. Examples of preferred solvents are hexane, heptane, cyclohexane, ethyl acetate, butyl acetate or methoxypropyl acetate and also methanol or water.
  • silane-crosslinkable polymers by the customary heterophase techniques of suspension, emulsion or miniemulsion polymerization takes place in an aqueous medium (cf., for example, Peter A. Lovell, MS El-Aasser, "Emulsion Polymerization and Emulsion Polymers” 1997, John Wiley and Sons, Chichester).
  • Preferred is a polymerization in bulk, in organic solution or in aqueous suspension.
  • Bulk polymerization has the advantage that the silane-crosslinkable polymers are obtained in the form of 100% systems.
  • the silane-crosslinkable polymers can advantageously be obtained in the form of granules.
  • the reaction temperatures are preferably from 0 0 C to 150 0 C, particularly preferably from 20 0 C to 130 0 C, most preferably from 30 0 C to 120 ° C.
  • the polymerization can be carried out batchwise or continuously, with presentation of all or individual constituents of the reaction mixture, with partial introduction and subsequent addition of individual constituents of the reaction mixture or after the metering process without presentation. All dosages are preferably carried out to the extent of the consumption of each common component. Particular preference is given to a process in which the silane-substituted RAFT reagents are initially charged and the remaining constituents are metered in.
  • initiators are the sodium, potassium and ammonium salts of peroxydisulphuric acid, hydrogen peroxide, t-butyl peroxide, t-butyl hydroperoxide, potassium peroxodiphosphate, t-butyl peroxo pivalate, cumene hydroperoxide, t-butyl peroxobenzoate, isopropylbenzene monohydroperoxide and azobisisobutyronitrile.
  • initiators are the sodium, potassium and ammonium salts of peroxydisulphuric acid, hydrogen peroxide, t-butyl peroxide, t-butyl hydroperoxide, potassium peroxodiphosphate, t-butyl peroxo pivalate, cumene hydroperoxide, t-butyl peroxobenzoate, isopropylbenzene monohydroperoxide and azobisisobutyronitrile.
  • the initiators mentioned are preferably used in amounts of from 0.01 to 4.0% by weight, based on the total weight of the monomers A) and B), or in amounts of less than 20 mol%, based on the RAFT reagent used.
  • the redox initiator combinations used are the abovementioned initiators in conjunction with a reducing agent.
  • Suitable reducing agents are sulfites and bis sulfites of monovalent cations, for example sodium sulfite, the derivatives of sulfoxylic acid, such as zinc or alkali metal formaldehyde sulfoxylates, for example sodium hydroxymethanesulfinate and ascorbic acid.
  • the amount of reducing agent is preferably 0.15 to 3 wt .-% of the monomers A), B) used.
  • small amounts of a metal compound which is soluble in the polymerization medium and whose metal component is redox-active under the polymerization conditions for example based on iron or vanadium, can be introduced.
  • Particularly preferred initiators are t-butyl peroxypivalate, and t-butyl peroxobenzoate, and the peroxide / reducing agent combinations ammonium persulfate / sodium hydroxymethanesulfinate and potassium persulfate / sodium hydroxymethanesulfinate.
  • the number-average M n of the polymer compositions obtainable silane crosslinkable polymers depends on the ratio of the monomers A) and optionally the monomers B) the silane-substituted RAFT reagents during the polymerization starting.
  • a reduction tion of the proportion of silane-substituted RAFT reagents relative to the monomers A) and optionally monomers B) leads to corresponding silane-crosslinkable polymers having higher number average polymer compositions M n .
  • an increase in the proportion of silane-substituted RAFT reagents relative to the monomers A) and optionally monomers B) leads to corresponding silane-crosslinkable polymers having lower number-average polymer compositions M n .
  • silane-substituted RAFT reagents and the monomers A) and optionally the monomers B) can be used in any ratio during the polymerization, the silane-crosslinkable polymers having any number-average polymer mass M n are accessible.
  • silane-crosslinkable polymers having a narrow molecular weight distribution are obtained by the process of the invention according to the RAFT reaction mechanism.
  • the molecular weight distribution can be expressed by the polydispersity index (PDI), which is the quotient of polymer masses M w / M n of a polymer.
  • PDI polydispersity index
  • the silane-crosslinkable polymers preferably have a PDI of from 3.0 to 1.0, more preferably from 2.5 to 1.0, even more preferably from 2.0 to 1.0, most preferably from 1.5 to 1 , 0 and most preferably between 1.5 to 1.1.
  • silane-crosslinkable polymers having the number-average polymer mass M n typical for polymerization reactions but narrow molecular weight distributions are obtainable.
  • silane-crosslinkable polymers in the form of solids, such as liquids of arbitrary viscosities, can be obtained by appropriately selecting the reaction parameters; ie it are highly viscous as low viscosity silane-crosslinkable polymers accessible.
  • the silane-crosslinkable polymers carry the silane groups at the chain ends of the polymers and are therefore distinguished by a defined structure, which is known to produce advantageous performance properties, such as a higher elasticity, stability or improved Liability.
  • additives can be added.
  • examples include one or more solvents; Film-forming agents; Pigment wetting and dispersing agents; surface effect additives. Textures such as hammered texture or orange peel texture can be achieved with these surface-effecting additives; Anti-foaming agent; Substrate wetting agents; Leveling agents; Adhesion promoters; Release agents; Tenside or hydrophobic additives.
  • the silane-crosslinkable polymers are suitable, for example, for use as polymeric binders in the range of paints, adhesives or sealants.
  • the silane-crosslinkable polymers can be used in pure form or as part of appropriate formulations.
  • the silane-crosslinkable polymers are accessible with viscosities according to the requirements placed on binders for 100% systems for paints, adhesives or sealants.
  • the silane-crosslinkable polymers preferably have viscosities of ⁇ 150,000 mPas, particularly preferably from 1000 mPas to 100,000 mPas.
  • Preferred adhesive applications for the silane-crosslinkable polymers are, for example, the use of silane-crosslinkable polymers as parquet adhesives or all-purpose adhesives.
  • Preferred applications as a sealant is the use of silane-crosslinkable polymers for the disposal of ceramics, wood or stone.
  • Preferred coating applications is the use of the silane-crosslinked polymers in clear lacquers or sealing lacquers for the coating of glass, wood, paper or plastics.
  • the silane-crosslinkable polymers can also be used as non-volatile plasticizers in plastic compounds, such as PVC, polyacrylates or silicones.
  • Example 2 RAFT reagent 2: To a solution of aminopropyltrimethoxysilane (0.04 mol, 7.5 ml) and triethylamine (0.04 mol, 5.55 ml) in 30 ml of THF was added 2-bromopropionic acid bromide ( 0.04 mol, 4.2 ml) in 2 ml of THF was added dropwise. It was stirred for a further 2 hours at room temperature, then filtered from precipitated salts. It was mixed with potassium ethylxanthogenate
  • Example 5 RAFT Ranges z 5: To a solution of N-cyclohexylaminomethyltrimethoxysilane (0.04 mol, 7.5 ml) and triethylamine (0.04 mol, 5.55 ml) at room temperature with stirring were added 2-bromopropionic acid bromide (0.04 mol, 4.2 ml). added dropwise in 2 ml of THF. It was stirred for a further 2 hours at room temperature, then filtered from precipitated salts. Intermediate A was obtained.
  • N-cyclohexylaminomethyltrimethoxysilane (0.04 mol, 7.5 mL) and triethylamine (0.04 mol, 5.55 mL) were mixed with carbon disulfide CS 2 (0.04 mol, 6 , 41 g) and stirred for 6 hours at room temperature.
  • carbon disulfide CS 2 (0.04 mol, 6 , 41 g)
  • the intermediate A was added and stirred at room temperature for 4 hours. It was filtered from precipitated salts, removed volatiles on a rotary evaporator (40 0 C, 40 mbar) and received the silane-substituted RAFT reagent of the following formula in the form of a yellow oil.
  • Tables 1 and 2 show that the silane-crosslinkable polymers (Examples 6 to 19) over polymers (Comparative Examples 1 and 2) which were not prepared by polymerization in the presence of RAFT reagents are characterized by low polydispersity indices, i. characterized by narrow molecular weight distributions.
  • polymers with very low molecular masses (for example example 8) as well as polymers with high molecular masses (for example example 18) are accessible, which each have narrow low polydispersity indices.
  • silane-crosslinkable polymers having very low viscosities can also be obtained by the process according to the invention (for example Example 14).
  • Example 20 Each of the silane-crosslinkable polymers from Example 6 or Example 12 was admixed with 1.5% by weight of a 2M methanolic solution of dibutyltin dilaurate and spread by doctor blade with a gap width of 120 ⁇ m on a glass plate.
  • the networking tion of the film thus obtained was carried out under normal conditions according to DIN50014 during one day.
  • a homogeneous, transparent, tack-free and strongly adhering film on the glass plate with elastic properties was obtained.
  • Such elasticity is characteristic of films obtained by crosslinking polymers whose crosslinkable groups are at the polymer chain ends.
  • VAc vinyl acetate
  • VL vinyl laurate
  • VeoVa9 neononanoic acid vinyl ester
  • VeoValO vinyl neodecanoate
  • AIBN azobisisobutyronitrile
  • TBPV Tertiary butyl perpivalate determined by gel permeation chromatography
  • VAc vinyl acetate
  • VL vinyl laurate
  • VeoVa9 neononanoic acid vinyl ester
  • VeoValO vinyl neodecanoate
  • AIBN azobisisobutyronitrile
  • TBPV Tertiary butyl perpivalate determined by gel permeation chromatography

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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

L'invention a pour objet des réactifs RAFT substitués par un silane, ayant les formules générales suivantes : R1 n(OR2 )3-nSi-L1 -Rf -R3 (1a), R1 n(OR2 )3-nSi-L1 -Rf -L2 -Si(OR2 )3-nR1 n (1b), et R1 n(OR2 )3-n Si-L1 -Rf -L2 -Rf -L3 -Si(OR2 )3-nR1 n(1c), dans lesquelles R1, R2 et R3 désignent respectivement, indépendamment l'un de l'autre, des atomes d'hydrogène ou des restes d'hydrocarbures en C1-C20 substitués éventuellement par -CN, -NCO, -NR1 2, -COOH, -COOR1, - PO(OR1 ) 2, -halogène, -acyle, -époxy, -SH, -OH ou CONR1 2 et dans lesquels, le cas échéant, un ou plusieurs atomes de carbone, non voisins entre eux, sont remplacés par des groupes -O-, -CO-, -COO-, -OCO-, -OCOO-, CONR1 -, -S-, -CSS-, -CSO-, -COS-ou NR1 -, -N= ou P=, n désignant des nombres entiers de 0 à 2, L1, L2 et L3 désignent, respectivement, indépendamment l'un de l'autre, des restes d'hydrocarbures en C1-C20- divalents, linéaires ou cycliques, éventuellement substitués par -CN, -NCO, -NR1 2, -COOH, -COOR1, -PO(OR1 ) 2, -halogène, -acyle, -époxy, -SH, -OH ou CONR1 2 et dans lesquels, éventuellement, un ou plusieurs atomes de carbone, non voisins entre eux sont remplacés par des groupes -O-, -CO-, -COO-, -OCO-, -OCOO-, CONR1 -, -S-, -CSS-, -CSO-, -COS- ou NR1 -, -N= ou P=, et Rf désigne, respectivement, un groupe réactif RAFT divalent, ainsi que des polymères réticulables avec un silane, obtenus par polymérisation initiée radicalaire de A) un ou plusieurs monomères éthyléniquement insaturés, sélectionnés dans le groupe comprenant les composés suivants : ester d'acide (méth)acrylique, ester vinylique, aromates vinyliques, oléfines, 1, 3-diène, vinylhalogène et éther vinylique, et éventuellement B) un ou plusieurs monomères auxiliaires insaturés. L'invention est caractérisée en ce que la polymérisation s'effectue en présence d'un ou de plusieurs réactifs RAFT substitués par un silane.
EP08803927A 2007-10-08 2008-09-10 Réactifs raft substitués par un silane, et polymères réticulables avec un silane Withdrawn EP2197888A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710000833 DE102007000833A1 (de) 2007-10-08 2007-10-08 Silan-substituierte RAFT-Reagenzien und Silan-vernetzbare Polymere
PCT/EP2008/061960 WO2009047070A2 (fr) 2007-10-08 2008-09-10 Réactifs raft substitués par un silane, et polymères réticulables avec un silane

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EP2197888A2 true EP2197888A2 (fr) 2010-06-23

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US (1) US20100222504A1 (fr)
EP (1) EP2197888A2 (fr)
CN (1) CN101821275A (fr)
DE (1) DE102007000833A1 (fr)
WO (1) WO2009047070A2 (fr)

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JP5924647B2 (ja) * 2012-04-02 2016-05-25 東洋ゴム工業株式会社 ケイ素化合物及びその製造方法、並びにその利用
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CN102924503B (zh) * 2012-11-06 2016-03-09 上海交通大学 一种含有硅烷的raft链转移试剂及其制备与应用
JP6550908B2 (ja) * 2015-05-08 2019-07-31 国立大学法人福井大学 アルケニルエーテル系重合体の製造方法
KR102012787B1 (ko) * 2016-03-03 2019-08-21 주식회사 엘지화학 (공)중합체, (공)중합체의 제조 방법 및, 이를 포함하는 친수성 코팅 조성물
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CN108003272B (zh) * 2017-12-29 2020-05-05 陕西科技大学 纳米纤维素/含氟聚丙烯酸酯无皂乳液的制备方法
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CN101821275A (zh) 2010-09-01
WO2009047070A3 (fr) 2009-08-06
WO2009047070A2 (fr) 2009-04-16
US20100222504A1 (en) 2010-09-02
DE102007000833A1 (de) 2009-04-09

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