Classifications

• • 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
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/24—Coatings containing organic materials
  • C03C25/40—Organo-silicon compounds
• • 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
  • C07F7/10—Compounds having one or more C—Si linkages containing nitrogen having a Si-N linkage
• • 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
  • 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
  • C07F7/1872—Preparation; Treatments not provided for in C07F7/20
  • C07F7/1892—Preparation; Treatments not provided for in C07F7/20 by reactions not provided for in C07F7/1876 - C07F7/1888
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/38—Polysiloxanes modified by chemical after-treatment
  • C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
  • C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
  • C08L83/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen

Definitions

• the invention relates to a process for the preparation of (meth) acrylamido-functional silanes and formulations containing these.
• the glass fiber is often surface treated with functionalized silanes. This is usually done with the aid of aqueous sizing in which the organofunctional silane is dissolved.
• the desired properties such as fiber strength or also cuttability (especially for the short fiber reinforcement) can be positively influenced.
• the organofunctional silanes also contribute significantly to the adhesion mediation between the inorganic fiber and the organic resin.
• thermosets and thermosets to increase the performance of the fiber composite material.
• these functionalized silanes are used as adhesion promoters
• silanes are used organic and inorganic matrix. Furthermore, methacryl-functionalized silanes are used for the production of artificial stones. For this purpose, these silanes are made together with unsaturated polyester resins (UPE resin) and silicon-containing natural stone, such as quartz sand and / or quartz powder to corresponding artificial stone slabs.
• UPE resin unsaturated polyester resins
• silicon-containing natural stone such as quartz sand and / or quartz powder
• DBTO Dibutyltin oxide
• Methacrylic acid ester of 100% which must be distilled off again. Thus, the space-time yield is bad.
• the reaction is carried out at high temperatures at 165-170 ° C, which causes problems due to the tendency to polymerize the acrylic acid. To avoid polymerization, a stabilizer must be used.
• catalysts for as complete a reaction as possible toxic,
• DBTO di-butyltin oxide
• the object of the present invention was to provide environmentally friendly processes for the preparation of (meth) acrylamido-functional silanes in which less, preferably no organic solvents are used and which provide good conversions without the use of toxic compounds, such as organic tin compounds.
• the use of stabilizers should be reduced, preferably, a method should be found that manages without the use of stabilizers.
• Another object was to find a method that allows production as a one-pot reaction. Furthermore, a formulation for the thus prepared
• aminosilanes are aminoalkylalkoxysilanes, preferably di- and / or triaminoalkyl-functional silanes. Particularly preferred are 3-aminopropyltrialkoxysilane or N- (2-aminoethyl) -3-aminopropyltrialkoxysilane approximately equimolar with acrylic acid anhydride, in particular
• Stabilizers are dispensed with. Accordingly, the invention provides a process consisting of the reaction of aminoalkylalkoxysilanes with acrylic anhydride with temperature control and optional removal of the liberated acrylic acid or its
• the acrylamidoalkylsilanes thus prepared can subsequently be hydrolyzed and / or condensed, if required, directly to oligomeric siloxanes or siloxanols and diluted as desired.
• a great advantage of the invention is that the acrylamidoalkyl-functional silanes thus obtained can preferably be used as bottom product without further purification.
• acrylamido-functional silanes and mixtures of these, in particular (meth) acrylamidoalkyl-functional alkoxysilanes can be offered as products which are particularly economical and ecologically produced. An expensive, distillative removal of solvents and diluents can be dispensed with.
• the invention relates to a process for the preparation of acrylamidoalkyl-functional silanes and mixtures thereof by an aminoalkyl-functional alkoxysilane of the formula I or a mixture comprising at least two silanes of the formula I
• R 1 independently a linear, branched or cyclic alkyl group with 1 to 8 C atoms, in particular with 1, 2, 3 or 4 C atoms
• R 2 independently a linear, branched or cyclic alkyl group with 1 to 8 C atoms Atoms
• R 3 independently a linear, branched or cyclic alkyl, aryl or alkylaryl group having 1 to 8 carbon atoms
• formula Ia independently is 0 or 1, preferably a is 0, b is independently 0, 1 or 2, b is preferably 0, in formula II c is independently selected from 1, 2, 3, 4, 5 and 6, d is independently selected from 1, 2, 3, 4, 5 and 6, e is independently selected from 0, 1, 2, 3, 4, 5 and 6, f is independently selected from 1, 2, 3, 4, 5
• the method consists of the aforementioned steps. Further, it is also preferable that the process is substantially without Presence of solvent or diluent and preferably without stabilizers to perform under temperature control. In this case, a method is considered substantially without
• Total composition is less than or equal to 1, 5 wt .-%, preferably less than or equal to 0.5 wt .-%, preferably less than or equal to 0.1 wt .-% to the detection limit.
• reaction-released hydrolysis alcohol from the alkoxysilane is not considered to be a solvent or diluent.
• An anhydrous reaction is a reaction, if the content of water during the reaction or in the reaction mixture or synonymous total composition less than or equal to 1 wt .-%, preferably less than or equal to 0.5 wt .-%, in particular 0.25 wt .-% , preferably less than or equal to 0.1% by weight, more preferably less than or equal to 0.001% by weight to 0.000001% by weight.
• a reaction is considered anhydrous if the content of water is less than or equal to 1 ppm by weight, in particular less than or equal to 0.1 ppm by weight.
• the reaction it is particularly preferred to carry out the reaction at a temperature below 80 ° C, in particular below 50 ° C, preferably below 45 ° C, preferably below 40 ° C, more preferably below 35 ° C to greater than or equal to 0 ° C, including all intermediate temperature values.
• a temperature below 80 ° C in particular below 50 ° C, preferably below 45 ° C, preferably below 40 ° C, more preferably below 35 ° C to greater than or equal to 0 ° C, including all intermediate temperature values.
• Particular preference is given to a process in which the reaction takes place in a defined temperature range, preferably below 50 ° C., preferably below 40 ° C., without the presence of a stabilizer.
• the process according to the invention preferably produces acrylamidoalkyl-functional silanes of the general formula V or mixtures thereof,
• R 1 independently a linear, branched or cyclic alkyl group having 1 to 8
• R 4 C CR 5 H
• R 2 is independently a linear, branched or cyclic alkyl group having 1 to 8 C atoms, and the group C is an acrylamidoalkyl-functional group, with a independently equal to 0 or 1, b is independently 0, 1 or 2, b is preferably 0, although a is preferably 0.
• the acrylic acid and / or their reaction products by means of distillation, formation of a soluble or insoluble compound or chromatography, in particular flash chromatography, or a
• the liberated acrylic acid can be masked by addition of complexing agents.
• the distillation can be carried out particularly gently under vacuum, for example between 0.001 to 800 mbar, in a customary distillation column, short-path distillation column or a thin-film evaporator.
• the distillation is preferably carried out at a bottom temperature below 150 ° C, preferably below 120 ° C. Further preferred are bottom temperatures below 100 ° C.
• Co-crystals with the acrylic acid or else insoluble salts with the liberated acrylic acid can generally be formed very effectively to form insoluble compounds.
• the advantage of forming insoluble compounds is that they bind acrylic acid liberated directly during the reaction, thus preventing the formation of
• Transesterification products can be prevented.
• heteroaromatics containing tertiary amines and / or nitrogen atoms can be used by way of example, preferably sterically hindered compounds.
• examples thereof are trialkylamines, preferably branched alkyl groups having 1 to 8 C atoms, such as triethylamine, tripropylamine, tributylamine or N-heteroaromatics, such as acridine, phenazine or pyridine.
• the tertiary amines may also be bound to a solid phase.
• Phenazine can bind two acrylic acids. According to a preferred alternative, the acrylic acid is not removed after or during the reaction when aminoalkyl-functional silanes of the formula I with secondary and / or tertiary nitrogen atoms are used in the process. Likewise subject of the invention is a method by
• the acrylic acid anhydride of formula IV is added so that the temperature of the acrylic acid anhydride of formula IV is added so that the temperature of the acrylic acid anhydride of formula IV is added so that the temperature of the acrylic acid anhydride of formula IV is added so that the temperature of the acrylic acid anhydride of formula IV is added so that the temperature of the acrylic acid anhydride of formula IV is added so that the temperature of the acrylic acid anhydride of formula IV is added so that the temperature of the acrylic acid anhydride of formula IV is added so that the temperature of the
• Mixture does not exceed 40 ° C, in particular does not rise above 40 ° C, preferably is cooled, and under temperature control, preferably below 50 ° C,
• step (II) acrylic acid is removed.
• the bottom temperature can be controlled in the reaction with (meth) acrylic anhydride by the dropping rate of (meth) acrylic anhydride.
• the reaction is carried out in the presence of an anhydrous aprotic or organic, protic solvent at a temperature below 40 ° C., in particular without the presence of a stabilizer. It may likewise be preferred to carry out the reaction in the presence of an anhydrous aprotic or organic protic solvent or solvent mixture, where at least one solvent forms insoluble compounds or stable complexes with the acrylic acid.
• the solvents may be selected from ketones, sec. Amines, tert. amines,
• Nitrogen-containing heteroaromatics, DMFA, especially Tiralkylamine, such as triethylamine, tributylamine, piperidine, with sterically hindered amines are preferred.
• the complexing agent is preferably used approximately equimolar or in excess of the liberated acrylic acid.
• An anhydrous solvent is in particular a solvent whose content of water is less than or equal to 1% by weight, in particular less than or equal to 0.5% by weight, preferably less than or equal to 0.1% by weight, more preferably less than or equal to 0.01% by weight. % to 0.00001% by weight.
• a solvent is considered anhydrous with a water content of less than 1 ppm by weight. It has been found that the transesterification products also occur in the direct reaction of aminosilanes with acrylic anhydride. Their education can by the
• Intercept acrylic acid be controlled.
• the active substance content of the silanes produced is preferably up to 100% by weight, in particular already as bottom product. Furthermore, they are preferably free from water and solvent or diluent-free production reasons.
• the silanes may have a certain content of silanols or oligomeric siloxane (ol) s. Also preferably, silanes can be obtained which have a low content of diluent of up to 5 wt .-%. In the later application, the active ingredient content of the silanes can be set arbitrarily.
• Triaminosilanes is that they have a primary and at least one secondary amino group, which is able to neutralize the (meth) acrylic acid liberated in the reaction to form a corresponding salt (Aminohydromethacrylat).
• the aminohydro (meth) acrylate can be cleaved basic.
• potassium ethylate the (meth) acrylic acid is precipitated as potassium methacrylate and can be easily removed by filtration.
• Preferred aminoalkyl-functional alkoxysilanes correspond to the formula I, where the group-B in formula I independently corresponds to a group of the formula II, with R 1 independently a linear, branched or cyclic alkyl group having 1 to 8 C atoms, in particular 1 , 2, 3, or 4 C atoms, preferably methyl, ethyl or propyl, and R 2 independently a linear, branched or cyclic alkyl group having 1 to 8 C atoms, in particular methyl, ethyl, propyl, n-butyl, Iso-butyl, tert-butyl, pentyl, hexyl, heptyl or octyl, and in formula II with R 3 is independently a linear, branched or cyclic alkyl, aryl or alkylaryl group having 1 to 8 C-atoms, in particular methyl Ethyl, butyl or benzyl, wherein h is 0,
• the aminoalkyl-functional alkoxysilane is a diaminoalkyl-functional or a triaminoalkyl-functional silane, preferably a diaminoalkyl-functional or a triaminoalkyl-functional
• Alkoxysilane of formula I corresponds.
• mixtures of the abovementioned silanes such as aminosilane with diaminosilane or else aminosilane with triamino-silane or diaminosilane with triamino-silane and also mixtures with three or more different aminosilanes of the formula I.
• acrylic acid anhydride preferably (meth) acrylic acid or acrylic anhydride are used, more preferably according to the formula IV
• the acrylic acid can be removed or masked; in particular, a complicated distillative workup, such as rectification, of the acrylamido-functional silanes is not necessary, since preferably the bottom products directly can be used.
• the bottom products of the invention require no further purification, since no interfering catalysts or interfering stabilizers in the
• the method is preferably with a
• an aminoalkyl-functional alkoxysilane of the general formula I selected from the following silanes: 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropylmethyldiethoxysilane, 1-aminomethyl- trimethoxysilane, 1-aminomethyltriethoxysilane, 2-aminoethyltrimethoxysilane, 2-aminoethyltriethoxysilane, 3-aminoisobutyltrimethoxysilane, 3-aminoisobutyltriethoxysilane, Nn-butyl-3-aminopropyltriethoxysilane, Nn-butyl-3-aminopropylmethyldiethoxysilane, Nn-butyl-3-aminopropyltrimethoxysilane, Nn-butyl-3-amin
• diaminoethylene-3-propyltrimethoxysilane diaminoethylene-3-propyltriethoxysilane, triaminodiethylene-3-propyltrimethoxysilane, triaminodiethylene-3-propyltriethoxysilane.
• the secondary amino function can neutralize the free acrylic acid and react to an aminohydromethacrylate, which can subsequently be cleaved basic.
• the invention also provides a formulation comprising a process product and at least one further formulation constituent selected from adjuvant, polymer, water, diluent, additive, pigment, filler, acid, base or buffer.
• a further formulation constituent selected from adjuvant, polymer, water, diluent, additive, pigment, filler, acid, base or buffer.
• polymers preference is given to using silane-terminated polyurethanes in the formulation.
• Further formulation constituents may be plasticizers, catalysts, crosslinkers and / or water scavengers.
• the addition of conventional stabilizers to increase the storage stability is possible.
• the acrylamidoalkyl-functional silanes prepared according to the invention can preferably be used as adhesion promoters, for the functionalization of glass, in particular for the functionalization of glass fibers, for the modification of fillers, pigments, organic surfaces and / or inorganic surfaces, in particular as a filler coating, the fillers being inorganic or organic Fillers may be, coating of pigments, coating of organic or inorganic surfaces, in
• resin systems in particular in unsaturated organic resin systems, such as alkyd resins.
• unsaturated organic resin systems such as alkyd resins.
• the silanes can be used for the production of masterbatches.
• the inventive method is characterized in that it can be operated in a particularly environmentally friendly and with very good space-time yield, because it is based on the pure reaction of Aminoalkylsilane with acrylic anhydride as a one-pot process and comes without the use of
• Heavy metals such as chromium
• tin compounds such as chromium
• chlorine-containing compounds can be dispensed with.
• the alcohol content after hydrolysis is determined by gas chromatography (wt .-%).
• Example 1 Example 1 :
• Table 3 shows the analysis results of the commercially available Y-5997.

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• 2012
  • 2012-04-20 DE DE102012206509A patent/DE102012206509A1/de not_active Withdrawn
• 2013
  • 2013-02-25 EP EP13705796.4A patent/EP2838904B1/de active Active
  • 2013-02-25 KR KR1020147029098A patent/KR101780102B1/ko not_active Expired - Fee Related
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