EP2646511A1 - Composition durcissable - Google Patents

Composition durcissable

Info

Publication number
EP2646511A1
EP2646511A1 EP11787894.2A EP11787894A EP2646511A1 EP 2646511 A1 EP2646511 A1 EP 2646511A1 EP 11787894 A EP11787894 A EP 11787894A EP 2646511 A1 EP2646511 A1 EP 2646511A1
Authority
EP
European Patent Office
Prior art keywords
boric acid
composition
composition according
amine
component
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Withdrawn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
EP11787894.2A
Other languages
German (de)
English (en)
Inventor
Simone Klapdohr
Jochen Mezger
Burkhard Walther
Helmut Mack
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.)
Construction Research and Technology GmbH
Original Assignee
Construction Research and Technology GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Construction Research and Technology GmbH filed Critical Construction Research and Technology GmbH
Priority to EP11787894.2A priority Critical patent/EP2646511A1/fr
Publication of EP2646511A1 publication Critical patent/EP2646511A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D201/00—Coating compositions based on unspecified macromolecular compounds
    • C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
    • C09D201/10—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing hydrolysable silane groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/55—Boron-containing compounds

Definitions

  • the present invention relates to a composition
  • a composition comprising organic prepolymers having at least two water-crosslinkable organosilicon end groups, boric acid and / or boric acid esters and an amine component. Further disclosed is a process for curing these compositions and the use of boric acid and / or boric acid esters and an amine component as a condensation catalyst.
  • Curable polymer systems having reactive organosilicon end groups, in particular alkoxysilyl groups, are known. In the presence of atmospheric moisture, which diffuses into the material to be hardened, and catalysts, alkoxysilane-terminated polymers are capable, even at room temperature, of condensing with elimination of the alkoxy groups.
  • Polymer systems may be, for example, acrylates, polyurethanes, polyureas, polycarbonates, polyethers and polyesters.
  • long-chain polymers thermoplastics
  • relatively wide-meshed three-dimensional networks elastomers
  • highly crosslinked systems thermosets
  • Moisture-curing adhesives and sealants as well as coatings and coatings have been playing an important role in numerous technical applications for years.
  • Adhesives and sealants based on polyurethanes silyi such TRACK ® polymers of Momentive Preformance Materials Inc., Desmoseal ® from Bayer MaterialScience AG, silyi striv polyureas; silyi-terminated polyethers, for example, MS-Polymer ® from Kaneka Corp., polymers of the ST Hanse Chemie AG, as well as ⁇ , ⁇ - silyi-terminated acrylates or Arcylat-telechelic polymers, including X-MAP ® Kaneka Corp.
  • silyated polysulfides have a very wide range of applications and are used in formulations adapted to the respective application, for example in civil engineering, in the aircraft or vehicle industry and in shipbuilding.
  • these adhesives and sealants are characterized by a broad adhesion spectrum on a variety of substrates without surface pretreatment by primer.
  • Typical catalysts for the curing of polymers with organosilicon end groups and in particular alkoxysilane-terminated polymers are tin catalysts. But there are also many other catalysts.
  • WO 2009/021928 A1 deals with silane-crosslinking, curable
  • compositions and their use in adhesives and sealants.
  • Catalysts for controlling the rate of cure are in particular organometallic compounds of titanium, iron, bismuth, zirconium, aluminum and Called tin. Furthermore, acidic compounds such as phosphoric acid, p-toluenesulfonic acid and amines. Boron halides are also disclosed as curing catalysts.
  • WO 2009/133062 proposes a process in which first a difunctional organic polymer with an organofunctional Silane is implemented. The resulting prepolymer is then mixed with a silane condensation catalyst selected from the group consisting of compounds of elements of the third main group and / or the fourth subgroup and heterocyclic organic amines, amine complexes of the elemental compounds or mixtures thereof, and optionally other substances.
  • a silane condensation catalyst selected from the group consisting of compounds of elements of the third main group and / or the fourth subgroup and heterocyclic organic amines, amine complexes of the elemental compounds or mixtures thereof, and optionally other substances.
  • the term of open time refers to the period of time from the beginning of the application of the adhesive to the joining of the parts to be joined in which an optimum adhesive bond is still obtained. Exceeding this time leads to poorer mechanical properties of the adhesive bond.
  • the prepolymer terminated with organosilicon end groups immediately begins to react in the presence of water.
  • the viscosity increases quickly.
  • the object of the present invention was therefore to provide a curable composition which has a long open time after activation, in which the composition has a constant viscosity and then cures very rapidly.
  • the open time should be set within the widest possible range.
  • the cured compositions obtained thereby should have good mechanical properties, in particular good elasticity and ductility.
  • the compositions should also be free of tin compounds.
  • the prepolymer P comprises organosilicon end groups of the formula (I)
  • R 1 is represented by a divalent hydrocarbon moiety of 1 to 10 carbon atoms
  • OR 2 is the same or different and is independently represented by an alkoxy group, wherein R 2 represents an alkyl group having 1 to 10 carbon atoms and / or OR 2 is a phenoxy group, a naphthyloxy group, a phenoxy group, which at the ortho-, metha- and / or para-position, with a C1-C20 alkyl, alkylaryl, alkoxy, phenyl, substituted phenyl, thioalkyl, nitro, halogen, nitrile, carboxyalkyl, carboxyamide, -N H2 and / or NHR 4 group in which R 4 represents a linear, branched or cyclic C 1 -C 20 -alkyl group, for example methyl, ethyl, propyl (n-, iso), butyl (n-, iso-, sec-) or phenyl,
  • R 3 is the same or different and is independently represented by an alkyl, alkenyl, arylene, arylalkyl or alkylaryl having in each case 1 to 15 carbon atoms, where the radicals may contain oxygen and / or sulfur and / or nitrogen atoms,
  • n is represented by 0, 1 or 2.
  • the organosilicon end groups consist of end groups of the formula (I).
  • compositions according to the invention in comparison with the prior art, have a furnace time that can be adjusted over a wide range and then cure very rapidly.
  • the present invention thus relates to compositions based on prepolymers P having at least two water-crosslinkable organosilicon end groups containing boric acid and / or boric acid ester and an amine component.
  • the composition according to the invention is particularly preferably an adhesive or sealant or a coating. Furthermore, it can also be about paints or varnishes.
  • alkoxysilane groups have the property of hydrolyzing on contact with water.
  • organosilanols organosilicon compound containing one or more silanol groups, SiOH groups
  • organosiloxanes organosilicon compound containing one or more siloxane groups, Si-O-Si groups.
  • the composition cures.
  • the water needed for the curing reaction can either come from air (atmospheric moisture), be formed by the reaction of boric acid (B) with amine (C), or the composition can be contacted with a water-containing component, e.g. B. by brushing or by spraying or it may be added to the composition in the application of a water-containing component, for. B. in the form of a water-containing paste, for example, is mixed in via a static mixer.
  • a water-containing component e.g. B. by brushing or by spraying or it may be added to the composition in the application of a water-containing component, for. B. in the form of a water-containing paste, for example, is mixed in via a static mixer.
  • organic prepolymers P according to the invention with organosilicon end groups of the formula (I) are obtained in particular by reacting corresponding prepolymers with suitable silylating agents.
  • silylating agents are suitable here
  • R represents an alkyl group or aryl group having one to 20 carbon atoms, in particular methyl, ethyl, iso-propyl, n-propyl, butyl group (n-, iso-, sec-), cyclohexyl, phenyl and naphthyl,
  • the silylating agent component of interest are, in particular, alkoxysilanes containing amino groups or isocyanate groups.
  • Suitable amino-containing alkoxysilanes are, in particular, compounds which are selected from the group of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-amino-2-methylpropyltrimethoxysilane, 4 -Aminobutyltrimethoxysilane, 4-aminobutylmethyldimethoxysilane, 4-amino-3-methylbutyltrimethoxysilane, 4-amino-3,3-dimethylbutyltrimethoxysilane, 4-amino-3,3-dimethylbutyl dimethoxymethylsilane, aminomethyltrimethoxysilane, aminomethyldimethoxymethylsilane, aminomethylmethoxydimethylsilane, aminomethyltriethoxysilane, aminomethyldiethoxymethylsilane, amino
  • isocyanate groups as alkoxysilanes are especially compounds is Ge, which are selected from the group consisting of Isocyanatopro- triethoxysilane, isocyanatopropyl trimethoxysilane, Isocyanatopropylmethyldiethoxysi- lan, isocyanatopropylmethyldimethoxysilane, isocyanatomethyltrimethoxysilane, natomethyltriethoxysilan isocyanate, Isocyanatomethylmethyldiethoxysilan, methyldimethoxysilane isocyanatomethyl, Isocyanatomethyldimethylmethoxysilan or isocyanatomethyl dimethylethoxysilane, and their analogues with isopropoxy or n-propoxy groups.
  • Ge which are selected from the group consisting of Isocyanatopro- triethoxysilane, isocyanatopropyl trimethoxysilane, I
  • n in the formula (I) has the value 0 or 1, so that in particular tri- or dialkoxysilyl groups are present.
  • dialkoxysilyl groups are that the corresponding compositions after curing are more elastic and softer than systems containing trialkoxysilyl groups. They are therefore particularly suitable for use as sealants.
  • Trialkoxysilyl however, a higher degree of crosslinking can be achieved, which is particularly advantageous if after curing a hard, solid mass is desired.
  • trialkoxysilyl groups are more reactive, ie they crosslink faster and thus reduce the required amount of catalyst, and they have advantages in the "cold flow".
  • n thus has the value 0.
  • boric acid and / or boric acid ester it is essential to use boric acid and / or boric acid ester in an amount between 0.01 to 3.0 wt .-%, based on the total composition.
  • the amount used has a significant influence on the open-time of the system and the rate of through hardening.
  • from 0.05 to 2.0% by weight of the boric acid and / or boric acid esters, in particular from 0.1 to 1% by weight, based on the total composition have proven to be preferred .
  • the boric acid ester is at least one compound selected from the group boric tri-C 1 -C 6 -alkyl esters, especially trimethyl borate, triethyl borate and / or tri-propyl borate, esters of diols such as 2-butoxy-2-bora-1,3 dioxolane, 2-ethoxy-4,5-dimethyl- [1, 3, 2] dioxaborolane, 1-aza-5-bora-4,7, 13-trioxa-bicyclo [3.3.3] undecane, 4-methyl-2 , 6,7-trioxa-1-borabicyclo [2.2.2] octane, mixed boric acid esters of amino alcohols and diols, such as.
  • the choice of the amine component and its amount used in the composition of the invention has a significant influence on the open time of the system and the rate of curing.
  • from 0.05 to 2.0% by weight of the amine component, in particular from 0.1 to 1% by weight, based on the total composition have proven to be preferred.
  • the amine component (C) may preferably be at least one amine selected from ethylamine, propylamine, butylamine, hexylamine, octylamine, laurylamine, dibutylamine, triethylamine, cyclohexylamine, monoethanolamine, diethanolamine, diethylenetriamine, 3- (dimethylamino) -1 propylamine, pentamethyldiethylenetriamine, benzylamine, amino-functional silanes, especially
  • Aminoethyl) aminopropylmethyldimethoxysilane) and heterocyclic organic amines in particular N-methylpyrrolidine, N-methylpiperidine, N, N-dimethylpiperazine, diaza-bicyclo-octane (DABCO), N- (2-hydroxyethoxyethyl) -2-azanorbornane, 1, 8- Diazadicyclo [5.4.0] undecene-7 (DBU), 1, 5-diazabicyclo [4.3.0] non-5-ene, N-dodecyl-2- methylimidazole, N-methylimidazole, 2-ethyl-2-methylimidazole, N-methylmorpholine, bis (2- (2,6-dimethyl-4-morpholino) ethyl) - (2- (4-morpholino) ethyl) amine, bis ( 2- (2,6-dimethyl-4-morpholino) ethyl) - (2- (2,6-dieth
  • latent amine may be a latent amine.
  • latent amines which can be used according to the invention are ketimines prepared from primary amines and ketones. Suitable ketones are, for example, acetone, methyl ethyl ketone, methyl propyl ketone, methyl isopropyl ketone, methyl isobutyl ketone, methyl isoamyl ketone, methylamyl ketone, diethyl ketone, dipropyl ketone, cyclohexanone.
  • latent amines which can be used are aldimines, in particular reaction products of primary amines with aldehydes and enamines, prepared from secondary amines and aldehydes or ketones and oxazolidines, prepared from aminoalcohols and isocyanates).
  • aldimines in particular reaction products of primary amines with aldehydes and enamines, prepared from secondary amines and aldehydes or ketones and oxazolidines, prepared from aminoalcohols and isocyanates).
  • the amines can be used, which are already described as component C.
  • the composition according to the invention contains the amine component (C) enclosed in a matrix, which is in particular a one-component system.
  • the amine component (C) is preferably present in encapsulated form.
  • the amine component (C) and the matrix are present as a core-shell capsule or as a matrix capsule.
  • the capsule or the matrix capsule has a diameter of 50 to 3000 ⁇ , preferably 100 to 1500 ⁇ , in particular 200 to 1000 ⁇ on.
  • the matrix is preferably a swellable polymer such as polyacrylic acid, water-soluble sulfo-containing copolymers, as described, for example, in WO 2007093392, or an inorganic matrix such as silica, titanium oxides, silica gel, ororg-org. Hybrid materials, soluble salts such as calcium chloride, alginate, carrageenan, gellan gum, amyloses and chitosan.
  • the amine component (C) in the mixtures according to the invention can be released by the action of ambient moisture, shear energy, radiation and / or pH changes. be set.
  • amine component (C) it may also be advantageous to use at least two amines as amine component (C), wherein an amine is preferably a coupling agent from the series of the abovementioned amino-functional silanes.
  • DABCO diaza-bicyclo-octane
  • DBU diaza-bicyclo-octane
  • DBU diaza-bicyclo-octane
  • the molar ratio of boric acid and / or boric acid esters to the amine component can be freely varied within wide limits. It is advantageous if the ratio of 1: 0.003 to 1: 300, in particular 1: 0.05 to 1: 20, and more preferably 1: 0.1 to 1:10.
  • the open-time can be adjusted within wide limits. In particular, this is between 0.5 minutes and 3 days, preferably 5 minutes to 10 hours and more preferably 10 minutes to 1 hour.
  • a particular advantage of the system according to the invention is the subsequent rapid curing.
  • the cure rate was measured as described in the examples.
  • the rate of through-cure can be varied widely and depends on the type and amount of the boric acid component and the amine component. Average cure rates for 10 mm less than 2 days can be achieved.
  • the organic prepolymer P may preferably be at least one polymer compound based on acrylates, polyurethanes, polyureas, polyethers and polyesters.
  • the prepolymers may also contain polyorganosiloxane blocks which are incorporated, for example, by hydrosilylation of H-terminated polyorganosiloxanes to polymer blocks carrying vinyl groups.
  • the polyorganosiloxanes may contain reactive groups via which the polyorganosiloxane is covalently incorporated into the organic prepolymer P.
  • Preferred reactive groups here are primary and secondary amino groups, hydroxy groups, carboxy and epoxy groups, trialkoxysilanes and (meth) acrylate groups.
  • the basic structure of the organic prepolymers P is polyurethanes and polyureas, these are composed of at least one polyol or polyamine component and one polyisocyanate component and can optionally be Chain extender included.
  • the method of preparation of the polyurethane or polyurea prepolymers is not critical to the present invention. It may thus be a one-step process, wherein the polyols and / or polyamines, polyisocyanates and chain extenders are simultaneously reacted with each other, which may, for example. In a batch reaction, or it may be a two-stage process, in For example, a prepolymer is first formed, which is subsequently reacted with chain extenders.
  • polyurethanes or polyureas may also contain further structural units, in particular these may be allophanates, biurets, uretdiones or cyanates.
  • the abovementioned groups are only examples in which the polyurethanes and polyureas according to the invention may also contain further structural units.
  • the degree of branching is not critical to the present invention, so that both linear and highly branched polymers can be used.
  • the molar ratio of the isocyanate component present in the polymer to the sum of the polyol or polyamine component is 0.01 to 50, preferably 0.5 to 1.8.
  • the isocyanate component is preferably an aliphatic, cycloaliphatic, araliphatic and / or aromatic compound, preferably a diisocyanate or triisocyanate, which may also be mixtures of these compounds. It is to be regarded as preferred that these are hexamethylene diisocyanate-1, 6 (HDI), HDI dimer, HDI trimer, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), 2,4 and / or 2,6-tolylene diisocyanate (TDI) and / or 4,4'-, 2,4'- and / or 2,2'-diphenylmethane diisocyanate (MDI), polymeric MDI, carbodiimide-modified 4,4'- MDI, m-xylylene diisocyanate (MXDI), m- or p-tetramethylxylylene diisocyanate (m-TMXDI,
  • Dicyclohexylmethane diisocyanate H 12MDI
  • naphthalene-1, 5-diisocyanate cyclohexane-1,4-diisocyanate
  • hydrogenated xylylene diisocyanate H6XDI
  • 1-methyl-2,4-diisocyanato-cyclohexane tetramethoxybutane-1,4-diisocyanate
  • Butane-1,4-diisocyanate 1,6-diisocyanato-2,2,4-trimethylhexane, 1,6-diisocyanato-2,4,4-trimethylhexane
  • 1-isocyanato-1-methyl-4 (3) -isocyanatomethylcyclohexane (IMCI) and 1, 12-dodecane diisocyanate (C12DI) is.
  • IMCI -isocyanatomethylcyclohexane
  • C12DI 1, 12-dode
  • polyisocyanates having two or three isocyanate groups per molecule are suitable.
  • they can also be mixtures of polyisocyanates, it being possible for the average number of isocyanate groups in the mixture to be in particular from 2.1 to 2.3, from 2.2 to 2.4 or from 2.6 to 2.8.
  • Derivatized polyisocyanates may also be used, for example, sulfonated isocyanates, blocked isocyanates, isocyanurates and biuret isocyanates.
  • the polyol or polyamine component is preferably polyetherresterpolyol, polyetherpolyols, polyesterpolyols, polybutadiene polyols and polycarbonate natpolyole, which may also be mixtures of these compounds.
  • the polyols and / or polyamines preferably contain between 2 and 10, more preferably between two and three hydroxyl groups and / or amino groups and have a weight-average molecular weight between 32 and 30,000, more preferably between 90 and 18,000 g / mol.
  • Suitable polyols are preferably the liquid at room temperature, glassy solid / amorphous or crystalline polyhydroxy compounds. Typical examples would be difunctional polypropylene glycols.
  • Suitable polyether polyols are the polyethers known per se in polyurethane chemistry, such as the polyols prepared using starter molecules by means of KOH or DMC catalysis of styrene oxide, ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran or epichlorohydrin.
  • poly (oxytetramethylene) glycol (poly-THF), 1, 2-polybutylene glycol, or mixtures thereof are particularly suitable.
  • Particularly suitable are polypropylene oxide, polyethylene oxide and butylene oxide and mixtures thereof.
  • copolymer which can be used as the polyol component and has terminal hydroxyl groups is of the general formula (preparable, for example, by means of Controlled High-Speed Anionic Polymerization according to Macromolecules 2004, 37, 4038-4043):
  • polyesterdi- or polyols by condensation of di- or tricarboxylic acids, such as adipic acid, sebacic acid, glutaric acid, azelaic acid, suberic acid, undecanedioic acid, dodecanedioic acid, 3,3-dimethylglutaric acid, terephthalic acid, isophthalic acid, hexahydrophthalic acid and / or dimer fatty acid, with low molecular weight diols, triols or polyols, such as ethylene glycol, Propylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, dimer
  • polystyrene resin e.g. based on caprolactone, which are also referred to as "polycaprolactones”.
  • polycaprolactones polycarbonate polyols and dimer diols as well as polyols based on vegetable oils and their derivatives, such as castor oil and its derivatives or epoxidized soybean oil.
  • hydroxyl-containing polycarbonates in question which by reaction of carbonic acid derivatives, for.
  • diphenyl carbonate, dimethyl carbonate or phosgene with diols are available. Particularly suitable are e.g.
  • Ethylene glycol 1,2- and 1,3-propanediol, 1,3- and 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, neopentyl glycol, 1,4-bis-hydroxymethylcyclohexane, 2-methyl-1, 3-propanediol, 2,2,4-trimethylpentanediol-1, 3, dipropylene glycol, polypropylene glycols, dibutylene glycol, polybutylene glycols, bisphenol A, tetrabromobisphenol A, glycerol, trimethylolpropane, 1, 2,6-hexanetriol, 1, 2,4-butanetriol, Trimethylolpropane, pentaerythritol, quinitol, mannitol, sorbitol, methyl glycoside and 1, 3,4,6-dianhydrohexite.
  • hydroxy-functional polybutadienes which i.a. marketed under the trade name "Poly-bd®” may serve as the polyol component as well as their hydrogenated analogs, as well as hydroxy-functional polysulfides marketed under the trade name "Thiokol® NPS-282" and hydroxy-functional polysiloxanes in question.
  • Hydrazine, hydrazine hydrate and substituted hydrazines such as N-methylhydrazine, ⁇ , ⁇ '-dimethylhydrazine, acid hydrazides of adipic acid, methyl adipic acid, sebacic acid, hydracrylic acid, terephthalic acid, semicarbazidoalkylene hydrazides, such as
  • Semicarbazidopropionklarehydrazid Semicarbazidoalkylen-carbazinester such.
  • 2-semicarbazidoethyl-carbazinester and / or Aminosemicarbazid compounds such as 13-Aminoethylsemicarbazidocarbonat.
  • Polyamines based on polyesters, polyolefins, polyacetals, polythioethers, polyethercarbonates, polyethylene terephthalates, polyesteramides, polycaprolactams, polycarbonates, polycaprolactones and polyacrylates, which have at least two amine groups, are also suitable for the preparation of the polyurethanes and polyureas.
  • Polyamines e.g. those sold under the trade name Jeffamine® (polyether polyamines) are also suitable.
  • polyol component and / or polyamine component are also known as so-called chain extender species in question, which in the production of Polyurethane and polyureas react with excess isocyanate groups, usually have a molecular weight (Mn) of less than 400 and are often in the form of polyols, amino polyols or aliphatic, cycloaliphatic or aliphatic polyamines.
  • Mn molecular weight
  • Suitable chain extenders are, for example:
  • Alkanediols such as ethanediol, 1,2- and 1,3-propanediol, 1,4- and 2,3-butanediol, 1,5-pentanediol, 1,3-dimethylpropanediol, 1,6-hexanediol, neopentylglycol, cyclohexane xandimethanol, 2-methyl-1, 3-propanediol, hexylene glycol, 2,5-dimethyl-2,5-hexanediol, ethylene glycol, 1, 2 or 1, 3-propanediol, 1, 2, 1, 3 or 1 , 4-
  • Component may contain double bonds, which may result, for example, from long-chain aliphatic carboxylic acids or fatty alcohols.
  • a functionalization with olefinic double bonds is z.
  • B. also by the incorporation of vinylic or ally- lischer groups possible. These may be derived, for example, from unsaturated acids such as maleic anhydride, acrylic acid or methacrylic acid and their respective esters.
  • the polyol component and / or polyamine component are polypropylene diol, polypropylene triol, polypropylene polyol, polyethylene diol, polyethylene triol, polyethylene polyol, polypropylenediamine, polypropylenetriamine, polypropylene polyamine, polyTHF-diamine , Polybutadiene diol, polyester ether diol, polyester triol, polyester polyol, polyester ether diol, polyester ether triol, polyester ether polyol, more preferably polypropylenediol, polypropylene triol, polyTHF diol, polyhexanediol carbamate diol, polycaprolactam diol and polycaprolactam triol.
  • the polyurethanes or polyureas contain polyols having a molecular weight between 1000 and 18000, in particular 2000 to 12000 and particularly preferably 3000 to 9000 g / mol. These polyols are more preferably polyTHF-diol, polypropylene glycol and random copolymers and / or block copolymers of ethylene oxide and propylene oxide.
  • the polyether polyols which have been prepared by KOH catalysis have proved to be preferred.
  • diols having a molecular weight of from 60 to 500, in particular from 85 to 200 are used as chain extenders, with the dioligomers of glycols being particularly preferred.
  • the polyurethanes or polyureas 2,4- and / or 2,6-tolylene diisocyanate (TDI) and / or 4,4'-, 2,4'- and / or 2 , 2'-diphenylmethane diisocyanate (MDI) in particular mixtures of isomers of TDI, with a 2,4-isomer content of more than 40% is particularly preferred.
  • the polyurethanes or polyureas may also contain crosslinker components, chain stopper components, and other reactive components.
  • Some crosslinkers have already been listed among the chain extenders containing at least three reactive hydrogens.
  • it may be glycerol, tetra (2-hydroxypropyl) ethylenediamines, pentaerythritol, trimethylolpropene, sorbitol, sucrose, triethanolamine and polymers having at least three reactive hydrogens (eg polyetheramines having at least three amine groups, polymeric triols, etc.).
  • Suitable chain stoppers are in particular compounds with reactive hydrogens, such as monools, monoamines, monothiols and monocarboxylic acids.
  • monools are used, where C 1 - to C 12 -alcohols (especially methanol to dodecyl alcohol), higher alcohols, polymers such as polyethers and polyesters having an OH group and structural units such as glycerol or sucrose, in which all except an OH group have been reacted, whereby in the conversion No further reactive hydrogens were introduced.
  • C 1 - to C 12 -alcohols especially methanol to dodecyl alcohol
  • higher alcohols polymers such as polyethers and polyesters having an OH group and structural units such as glycerol or sucrose, in which all except an OH group have been reacted, whereby in the conversion No further reactive hydrogens were introduced.
  • UV-resistant variant are as polyol preferably polyester having at least two OH groups, polycarbonates having at least two OH groups, polycarbonate esters having at least two OH groups, PolyTHF, polypropylene glycol, random copolymers and / or block copolymers of ethylene oxide and propylene oxide used.
  • compositions according to the invention containing polyurethanes may furthermore contain light stabilizers, in particular of the neck type.
  • this is called 4-amino-2,2,6,6-tetramethylpiperidine.
  • the basic structure of the organic prepolymer P is acrylates, these are compounds which contain at least one monomer from the series of acrylic esters and methacrylic esters, preferably at least 70% by weight of the polymer being at least one compound of the series of acrylic esters, Methacrylic acid ester and styrenes.
  • the monomers of the acrylate component are preferably at least one compound from the series Ethyldiglycolacrylat, 4-tert. Butylcyclohexyl acrylate, dihydrocyclopentadienyl acrylate, lauryl (meth) acrylate, phenoxyethyl acrylate, isobornyl (meth) acrylate, dimethylaminoethyl methacrylate, cyanoacrylates, citraconate, itaconate and derivatives thereof, (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, n- Propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth
  • it is two or more monomers from the series n-butyl acrylate, 2-hydroxyethyl (meth) acrylate, acrylic acid, methacrylic acid and methyl methacrylate.
  • copolymers of at least two of the abovementioned monomers are used, the ratio being selected in such a form that the copolymers obtained have the desired performance properties for the particular application.
  • the skilled worker is familiar with suitable copolymers having the desired performance properties.
  • copolymers of n-butyl acrylate and methyl methacrylate are preferred for adhesives and sealants, which are used in a molar ratio in which the copolymer obtained has a glass transition temperature which lies between those of the corresponding homopolymers.
  • the acrylates of the present invention may be both copolymer and homopolymers.
  • the acrylic acid polymers may further contain other ethylenically unsaturated monomers.
  • examples include mono- and polyunsaturated hydrocarbons here stoffmonomere, Vinylester (eg. Vinylester from d- to C ß saturated monocarboxylic acids), vinyl ethers, monoethylenically unsaturated mono- and polycarboxylic acids and alkyl esters of these monocarboxylic and polycarboxylic acids (eg. Acrylate and Methacrylic acid esters such as C 1 - to C 12 -alkyl and especially C 1 - to C 4 -alkyl esters), amino monomers and nitriles, vinyl- and alkylvinylidenes and amides of unsaturated carboxylic acids.
  • mono- and polyunsaturated hydrocarbons here stoffmonomere Vinylester (eg. Vinylester from d- to C ß saturated monocarboxylic acids), vinyl ethers, monoethylenically unsaturated
  • unsaturated hydrocarbon monomers comprising styrene compounds (for example styrene, carboxylated styrene and ⁇ -methylstyrene), ethylene, propylene, butylene and conjugated dienes (butadiene, isoprene and copolymers of butadiene and isoprene).
  • styrene compounds for example styrene, carboxylated styrene and ⁇ -methylstyrene
  • ethylene propylene
  • butylene and conjugated dienes butadiene, isoprene and copolymers of butadiene and isoprene.
  • vinyl and halovinylidene monomers mention may be made of vinyl chloride, vinylidene chloride, vinyl fluoride and vinylidene fluoride.
  • vinyl esters examples include aliphatic vinyl esters such as vinyl formate, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl valerate, vinyl caproate and allyl esters of saturated monocarboxylic acids such as allyl acetate, allyl propionate and allyl lactate.
  • vinyl ethers mention may be made of methyl vinyl ether, ethyl vinyl ether and N-butyl vinyl ether.
  • Typical vinyl ketones include methyl vinyl ketones, ethyl vinyl ketones and isobutyl vinyl ketones.
  • dialkyl esters of monoethylenically unsaturated dicarboxylic acids include dimethyl maleate, diethyl maleate, dibutyl maleate, octyl maleate di-, diisooctylmaleate, Dinonylmaleat, Diisodecylmaleat, Ditridecylmaleat, di- methyl fumarate, diethyl fumarate, dipropyl fumarate, dibutyl fumarate, dioctyl fumarate, diisopropyl sooctylfumarat, Didecylfumarat, dimethyl itaconate, diethyl itaconate, dibutyl itaconate and dioctyl itaconate.
  • the monoethylenically unsaturated monocarboxylic acids are acrylic acid, methacrylic acid, ethacrylic acid and crotonic acid.
  • the monoethylenically unsaturated dicarboxylic acids include maleic acid, fumaric acid, itaconic acid and citric acid.
  • monoethylenically unsaturated tricarboxylic acids for example, aconitic acid and its halogen-substituted derivatives can be used with regard to the present invention.
  • the anhydrides and esters of the abovementioned acids for example maleic anhydride and citric anhydride
  • nitriles of ethylenically unsaturated Mono-, di- and tricarboxylic acids include acrylonitrile, ⁇ -chloroacrylonitrile and methacrylonitrile.
  • the amides of the carboxylic acids may be acrylamides, methacrylic amides and other ⁇ -substituted acrylamides and N-substituted amides, for example N-methylolacrylamide, N-methylolmethylacrylamide, alkylated N-methylolacrylamides and N-methylolmethacrylamides (for example N-methoxymethylacrylamide and N-
  • Methoxymethylmethacrylamide Methoxymethylmethacrylamide
  • amino monomers it is possible to use substituted and unsubstituted aminoalkyl acrylates, hydrochloride salts of the amino monomers and methacrylates such as ⁇ -aminoethyl acrylate, ⁇ -aminoethyl methacrylate, dimethylamino-methyl acrylate, ⁇ -methylaminoethyl acrylate and dimethylaminomethyl methacrylate.
  • ⁇ - and ⁇ -ethylenically unsaturated compounds which are suitable for the polymerization and contain primary, secondary or tertiary amino groups, for example dimethylaminoethyl methacrylate, dimethylaminoneopentyl acrylate, dimethylaminopropyl methacrylate and tert-butylaminoethyl methacrylate or organic, may be mentioned with regard to the cationic monomers and inorganic salts of these compounds and / or alkylammonium compounds such as trimethylammoniumethylmethacrylate chloride, diallyldimethylammonium chloride, ⁇ -acetamidodiethylaminoethylacrylate chloride and methacrylamidepropyltrimethylammonium chloride.
  • primary, secondary or tertiary amino groups for example dimethylaminoethyl methacrylate, dimethylaminoneopentyl acrylate, dimethylaminopropyl methacrylate and
  • cationic monomers can be used alone or in combination with the aforementioned other monomers.
  • hydroxy-containing monomers are the ⁇ -hydroxyethyl acrylates, ⁇ -hydroxypropyl acrylates, v-hydroxypropyl acrylates and ⁇ -hydroxyethyl methacrylates.
  • the polymers P based on acrylates which can be used according to the invention are composed of at least one acrylate component and at least two organosilicon end groups.
  • the acrylates can be obtained, for example, from the reaction of alkenyl-terminated acrylates by hydrosilylation, where the alkenyl-terminated acrylates can be prepared by atom transfer radical polymerization (ATRP) or from the reaction of alkenyl-terminated acrylates with organosilicon-endblocked monomer, wherein the alkenyl-terminated acrylates can be prepared via atom transfer radical polymerization (ATRP).
  • ATRP atom transfer radical polymerization
  • controlled radical polymerizations such as NMP (nitroxide mediated polymerization), SET (single electron transfer polymerization) or RAFT (reversible addition fragmentation chain transfer polymerization) are also suitable.
  • NMP nitrogenide mediated polymerization
  • SET single electron transfer polymerization
  • RAFT reversible addition fragmentation chain transfer polymerization
  • alkoxysilane compounds in particular trimethoxysilane, triethoxysilane, methyldiethoxysilane, methyldimethoxysilane and phenyldimethoxysilane, are suitable.
  • the organosilicon end groups are bonded to the acrylate component by a monomer
  • the monomers used are in particular 3- (meth) acryloxypropyltrimethoxysilane, 3- (meth) acryloxypropylmethyldimethoxysilane, (Meth) acryloxypropyltriethoxysilane, 3- (meth) acryloxypropylmethyldiethoxysilane, (meth) acryloxymethyltrimethoxysilane, (meth) acyloxymethyl-methyldimethoxysilane, (meth) acryloxymethyltriethoxysilane and (meth) acryloxymethylmethyldiethoxysilane.
  • the organic prepolymers P according to the invention with organosilicon end groups based on acrylates preferably have a weight-average molecular weight between 500 and 200,000 g / mol, more preferably between 5,000 and 100,000 g / mol.
  • the basic structure of the organic prepolymers P may also be polyethers.
  • construction sealants have been on the market for some time now, which are known as MS- Polymer® from Kaneka Corp. and / or Excestar of Asahi Glass Chemical Corp. where "MS” stands for "modified silicone”.
  • These alkoxysilane-terminated polyethers are particularly suitable for the present invention. These are polymers consisting of alkoxy silane-terminated polyether chains prepared by hydrosilylation of terminal double bonds.
  • the alkoxysilane end groups consist of a silicon bound to the polyether chain, to which two alkoxy groups and one alkyl group or three alkoxy groups are bonded.
  • Suitable polyether components include the polyols prepared from starter molecules using styrene oxide, propylene oxide, butylene oxide, tetrahydrofuran or epichlorohydrin. Particularly suitable are polypropylene oxide, polybutylene oxide, polyethylene oxide and tetrahydrofuran or mixtures thereof. In this case, in particular molecular weights between 500 and 100,000 g / mol, especially 3000 and 20,000 g / mol are preferred.
  • the polyether is reacted with organic compounds containing a halogen atom selected from the group chlorine, bromine or iodine and a terminal double bond.
  • organic compounds containing a halogen atom selected from the group chlorine, bromine or iodine and a terminal double bond Allyl chlorides, allyl bromides, vinyl (chloromethyl) benzene, allyl (chloromethyl) benzene, allyl (bromomethyl) benzene, allyl (chloromethyl) ether, allyl (chloromethoxy) benzene, butanyl (chloromethyl) ether, are particularly suitable for this purpose. 1, 6-vinyl (chloromethoxy) benzene, wherein in particular allyl chloride is preferably used.
  • polyethers having terminal double bonds are reacted by hydrosilylation to give polyethers having alkoxysilane end groups.
  • Suitable hydrosilylation agents are, in particular, trimethoxysilane, triethoxysilane, methyldiethoxysilane, methyldimethoxysilane and phenyldimethoxysilane.
  • composition of the invention in addition to the components (A), (B) and (C), contain additional additional components.
  • Adhesion promoters for example epoxysilanes, anhydridosilanes, adducts of silanes with primary aminosilanes, ureidosilanes, aminosilanes, diamino silanes, and their analogs as monomer or oligomer and urea silanes; e.g. Dynasylan AMEO, Dynasyl AM MO, Dynasylan DAMO-T, Dynasylan 1 146, Dynasylan 1 189, Silquest A-Link 15, Epoxy resins, Alkyl titanates, Titanium chelates, Aromatic polyisocyanates,
  • Vinyltriethoxysilane, vinyltrimethoxysilane, ⁇ -functional silanes such as N- (silylmethyl) -0-methyl-carbamates, in particular N- (methyldimethoxysilylmethyl) -0-methyl-carbamate, (methacryloxymethyl) silanes, methoxymethylsilanes, N-phenyl-, N-cyclohexyl and N-alkylsilanes, orthoformic acid esters, calcium oxide or molecular sieve;
  • Catalysts such as bismuth organic compounds or bismuth complexes.
  • suitable metal catalysts are titanium, zirconium, zinc, Sn and lithium catalysts, as well as metal carboxylates, it also being possible to use combinations of different metal catalysts;
  • Light and aging inhibitors which act in particular as stabilizers against heat, light and UV radiation, for example phenolic antioxidants which act as radical scavengers, such as 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butyl butylphenol, 2,4-dimethyl-6-tert-butylphenol, 2,2'-methylenebis (4-methyl-6-tert-butylphenol), 4,4'-butylidene bis (3-methyl-6-tert -butylphenol), 4,4'-thio-bis (3-methyl-6-tert-butylphenol), 5-tetrakis [methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane and 1, 1, 3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butanes and antioxidants based on amines (for example phenyl- ⁇ -naphthylamine, ⁇ -
  • Biocides such as algicides, or fungal growth inhibiting substances
  • Fillers e.g. Example, ground or precipitated calcium carbonates, which are optionally coated with fatty acids or fatty acid mixtures, for example stearates, especially finely divided coated calcium carbonate, carbon blacks, especially industrially produced carbon blacks, kaolins, aluminas, silicic acids, particularly highly dispersed Silica from pyrolysis processes, PVC powder or hollow spheres.
  • Preferred fillers are carbon black, calcium carbonates, such as, precipitated or natural chalk types such as Omyacarb ® from. Omya, Ultra P Flex ® from. Specialty Minerals Inc, Socal ® U 1 S 2, Socal ® 312, Winnofil ® 312, Fa. Solvay, Hakuenka ® from.
  • minerals such as silica, talc, calcium sulfate (gypsum) in the form of anhydrite, hemihydrate or dihydrate, silica flour, silica gel, precipitated or natural barium sulfate, titanium dioxide, zeolites, leucite, potassium feldspar, biotide, the group of soro-, cyclo-, Ino-, Phyllo- and Hectosilicates, the group of sparingly soluble sulfates such as gypsum, anhydrite or barite, and
  • Calcium minerals such as calcite, powdered metals (e.g. aluminum, zinc or iron) and barium sulfate;
  • Rheology modifiers such as thickeners, e.g. As urea compounds, polyamide waxes, bentonites, silicones, polysiloxanes, hydrogenated castor oil, metal soaps such as calcium stearate, aluminum stearate, barium stearate, fumed silica and poly (oxy-1, 2-ethanediyl) -a-hydro-Q-hydroxy-polymer with oxy 1,2-ethanediyl-a-hydro-Q-hydroxy-nonyl-phenoxyglycidyl ether oligomers and 5-isocyanato-1- (isocyanatomethyl) -1,3,3-trimethylcyclohexane or hydroxyethylcellulose or polyacrylic acid polymers and copolymers;
  • thickeners e.g. As urea compounds, polyamide waxes, bentonites, silicones, polysiloxanes, hydrogenated castor oil, metal soaps such as calcium stearate, aluminum ste
  • Surfactants such as wetting agents, flow control agents, deaerators, defoamers and dispersants; Fibers, for example of carbon, cellulose, polyethylene or propylene;
  • Pigments for example titanium dioxide
  • Solvents such as water, aromatic hydrocarbons such as toluene and xylene, solvents based on esters such as ethyl acetate, butyl acetate, allyl acetate and
  • Cellulose acetate and ketone based solvents such as methyl ethyl ketone, methyl isobutyl ketone and diisobutyl ketone and acetone, alcohols such.
  • compositions according to the invention are adhesives and sealants or coatings, these may contain plasticizers.
  • plasticizers are disclosed, for example, in WO 2008/027463 on page 19, line 5 to page 20, line 9.
  • WO 2008/027463 is hereby incorporated by reference and its contents are hereby incorporated into the application.
  • the compositions of the invention cure upon contact with water. Depending on the temperature, the type of contact, the amount of moisture and the proportion by weight of components (B) and (C) and, if appropriate, other catalysts, curing takes place at different speeds.
  • a skin is first formed on the surface of the composition.
  • the so-called skin-forming time therefore represents a measure of the curing rate.
  • such a skin-forming time of up to 3 hours at 23 ° C. and 50% relative atmospheric humidity is desirable.
  • a longer skinning time can also be advantageous.
  • the composition according to the invention is a one-component system.
  • One aspect of the present invention is thus a process for curing a composition according to the invention, wherein (B) is boric acid ester, the composition is present as a one-component system and is exposed to ambient moisture.
  • the components used in a one-component system do not affect the storage stability of the composition, i. H. that during storage they do not significantly trigger the crosslinking reaction of the organosilicon end groups contained in the composition.
  • this means that such further components preferably contain no or at most traces of water. It may therefore be useful to chemically or physically dry certain components prior to incorporation into these compositions. If this is not possible or not desired, in these cases it may be advantageous to carry out the composition as a two-component system, wherein the component or components which adversely affect storage stability are formulated separately from the organic polymer (A) into the second component become.
  • a two-component system is particularly advantageous when (B) is boric acid, whereby amine (C) can be formulated separately from boric acid (B).
  • one component of the two-component system may preferably contain the organic prepolymer P (A) and amine (C), while the second component contains boric acid (B).
  • one component of the two-component system may contain the organic prepolymer P (A) and boric acid (B), while the second component comprises amine (C). If the composition contains further constituents which adversely affect the storage stability, these may likewise be formulated separately from organic prepolymer P (A) into the second component.
  • one aspect of the present invention is a process for curing a composition of the invention wherein (B) is boric acid which is separate from the amine component (C) in a two component system and the components are mixed together.
  • boric acid (B) has the advantage that the curing can be carried out in the absence of ambient moisture.
  • Water is released by the reaction of boric acid (B) with amine (C).
  • ambient moisture curing of such structures is difficult because the moisture must diffuse over a further distance through the structure.
  • Once the outer area is through-hardened, further diffusion into the interior of the structure can be severely slowed, thereby taking a long time to harden the system.
  • water is released uniformly throughout the system by the reaction of boric acid (B) and amine (C).
  • the cure of the system is thus independent of the structure formed with the composition.
  • One aspect of the present invention is thus a process for curing a composition of the invention wherein the cure is carried out in the absence of ambient humidity.
  • the composition according to the invention contains boric acid (B), which is enclosed in a matrix, which is in particular a one-component system.
  • the boric acid is preferably present in encapsulated form.
  • the boric acid and the matrix are present as a core-shell capsule or as a matrix capsule.
  • the capsule or the matrix capsule has a diameter of 50 to 3000 ⁇ , preferably 100 to 1500 ⁇ , in particular 200 - 1000 ⁇ on.
  • the matrix is preferably a swellable polymer such as polyacrylic acid, water-soluble sulfo-containing copolymers, as described, for example, in WO 2007093392, or an inorganic matrix such as silica, titanium oxides, silica gel, ororg-org. Hybrid materials, soluble salts such as calcium chloride, alginate, carrageenan, gellan gum, amyloses and chitosan.
  • the boric acid in the mixtures according to the invention can be released by the action of ambient moisture, shear energy, radiation and / or pH changes.
  • a further aspect of the present invention is thus a process for curing a composition according to the invention, wherein (B) is boric acid which is enclosed in a matrix, the composition is present as a one-component system and is exposed to ambient moisture.
  • Another embodiment of the present invention is a process for curing a composition of the invention wherein the amine component (C) is included in a matrix, the composition is a one-component system, and the composition is exposed to conditions under which the amine component (C ) is released from the matrix.
  • Another aspect is a method for curing a composition of the invention wherein the amine component (C) is a latent amine, the composition is in the form of a one-component system and the composition is exposed to conditions under which the amine is liberated.
  • the amine component (C) is a latent amine
  • compositions according to the invention in the form of one- or two-component systems can be stored in the absence of moisture in a suitable packaging or arrangement such as a keg, bag or cartridge over a period of several months to several years without them change in their application properties or in their properties after curing to a degree relevant to the use.
  • a suitable packaging or arrangement such as a keg, bag or cartridge
  • the storage stability is determined by measuring the viscosity, the Auspressmenge or the Auspresskraft.
  • the compositions according to the invention When cured, the compositions according to the invention have a high mechanical strength with a high extensibility and good adhesion properties. As a result, they are suitable for a large number of applications, in particular as an elastic adhesive, as an elastic sealant or as an elastic coating. In particular, they are suitable for applications which require rapid curing and high demands on ductility, while at the same time demanding high adhesion properties and strength. Another object of the present invention is thus the use of the composition as an adhesive or sealant for the production of cohesive connections between joining parts.
  • the composition of the invention has a high mechanical strength in the cured state with a high elasticity and good adhesion properties. As a result, it is suitable for a large number of applications, in particular as an elastic adhesive, as an elastic sealant or as an elastic coating. In particular, it is suitable for applications which require a long open time and rapid curing and make high demands on the extensibility coupled with high demands on the adhesion properties and the strengths.
  • Suitable applications are, for example, the cohesive connections between adherends of concrete, mortar, glass, metal, ceramic, plastic and / or wood.
  • the composition according to the invention can be used for the grouting of natural stones.
  • the adhesives and sealants of the invention can be used for the manufacture or repair of industrial goods or consumer goods and for the sealing or bonding of components in civil engineering or in particular in the sanitary sector.
  • the parts to be joined may be parts in the car, trailer, truck, caravan, train, aircraft, ship and track construction.
  • An adhesive for elastic bonds in this area is preferably applied in the form of a bead in a substantially round or triangular cross-sectional area.
  • Elastic adhesive bonds in vehicle construction are, for example, the adhesion of parts such as plastic covers, moldings, flanges, bumpers, cabs or other attachments to the painted body of a means of transport or the gluing of discs in the body.
  • the composition described is used as an elastic adhesive or sealant.
  • the composition typically has an elongation at break of at least 50% and as an elastic sealant of at least 300% at room temperature.
  • the composition for application of the composition as a sealant for, for example, joints in civil engineering or for use as an adhesive for elastic bonds, for example, in vehicle construction, the composition preferably has a pasty consistency with pseudoplastic properties.
  • a pasty sealant or adhesive is applied to the adherend by means of a suitable device.
  • suitable methods for application are, for example, the application of commercially available cartridges which are operated manually or by means of compressed air or from a drum or hobbock by means of a feed pump or a progressing cavity pump, if necessary by means of an application robot.
  • the parts to be joined can be pretreated before applying the adhesive or sealant.
  • pretreatments include, in particular, physical and / or chemical cleaning processes, for example grinding, sandblasting, brushing or the like or treatment with cleaners or solvents or the application of an adhesion promoter, a primer solution or a primer.
  • the composition according to the invention is applied either to one or the other adherend or to both adherends. Thereafter, the parts to be bonded are added, whereupon the adhesive hardens. It must always be ensured that the parts are joined within the set open time, in order to ensure that the two parts are reliably glued together.
  • Another object of the present invention is a process for preparing a composition, wherein a) polymer P and optionally at least one compound from the series filler, thixotropic agent, plasticizer, antioxidant and UV absorber is presented, b) an amine component and optionally at least one compound from the series solvents and adhesion promoters is added and, c) boric acid and / or boric acid ester and optionally further components is added, wherein the components are mixed homogeneously.
  • composition is to be storable and contains c) boric acid, it is preferably not mixed in and provided in the form of a second component and, if appropriate, mixed with further components.
  • c) comprises boric acid when the amine is a latent amine or an encapsulated amine.
  • the components used are mixed or kept in motion during the entire process.
  • the components used can also be homogeneously mixed with one another only at the end of the production process.
  • Suitable mixing devices are all devices known to the person skilled in the art, in particular they may be a static mixer, planetary mixers, horizontal turbulent mixers (Drais), planetary dissolvers or dissolvers (PC Laboratory systems), intensive mixers and / or extruders.
  • the process according to the invention for the preparation of the composition can be carried out discontinuously, for example in a planetary mixer. However, it is also possible to operate the process continuously, with extruders in particular having proven suitable for this purpose. In this case, the binder is added to the extruder and added liquid and solid additives.
  • Another aspect of the present invention is the use of boric acid and / or boric acid esters and an amine component as a condensation catalyst in the compositions of the invention.
  • This is preferably an adhesive or sealant or a coating.
  • boric acid and amines are used, it is possible to cure the compositions according to the invention independently of the ambient humidity, which is advantageous, in particular, in the case of relatively large layer thicknesses.
  • silane-terminated polyurethane prepolymer 600 g PPG 8000 (Acclaim ® 8200, Bayer AG) are reacted with 28.34 g of isophorone diisocyanate (Vestanat I PDI, Evonik Industries AG) and mixed at 95 ° C heated. Then 150 ppm of catalyst (dibutyltin dilaurate, Air Products and Chemicals Inc.) are added dropwise with stirring. After 1.5 h, another 10 ppm of catalyst are added.
  • catalyst dibutyltin dilaurate, Air Products and Chemicals Inc.
  • NCO value (determined by titration) is 0.7% and 0.103 mol of an amino group-containing trialkoxysilane (N-butylaminopropyltrimethoxysilane, DN 1 189, Evonik Industries AG) are added. After 15 minutes, 1% by weight of vinyltrimethoxysilane (Dynasylan VTMO, Evonik Industries AG) is added and allowed to cool slowly to RT. A clear, colorless liquid is obtained. Synthesis of latent hexylamine
  • Aerosil R202 (Evonik Industries AG) 2
  • the sealant is cured at 23 ° C and 50% relative humidity for 10 days and stamped test specimens and determined the tensile strength according to DIN 53504.
  • the skin build time was determined as follows:
  • sealant Approximately 2 g of sealant were spread on a plate about 1 cm thick and stored at 23 ° C and 50% relative humidity. By periodic contact of the sealant surface with the end of a wooden spatula, that time was determined at which a skin adhering to the spatula tip can be pulled up from the surface.
  • the cure rate was determined as follows:
  • the composition was applied in the recess of a Teflon mold with a wedge-shaped recess and brushed off with a wooden spatula. After 24 hours at 23 ° C and 50% rel. Humidity was carefully lifted from the thin end of the wedge to the now cross-linked adhesive from the Teflon mold to the point (ie, thickness) at which uncured adhesive is found on the inclined wedge relief surface. Due to the dimensions of the curing layer thickness can be determined as a measure of the cure rate.

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  • Life Sciences & Earth Sciences (AREA)
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Abstract

Composition contenant (A) au moins 5 % en poids d'un prépolymère organique P possédant au moins deux groupes terminaux organosilicium pouvant être réticulés par de l'eau, (B) 0,01 à 3,0 % en poids d'acide borique et / ou d'esters de l'acide borique et (C) 0,01 à 3,0 % en poids d'un constituant amine. La présente invention concerne en outre un procédé de durcissement de ces compositions ainsi que l'utilisation d'acide borique et / d'esters de l'acide borique et d'un constituant amine en tant que catalyseur de condensation.
EP11787894.2A 2010-12-03 2011-11-25 Composition durcissable Withdrawn EP2646511A1 (fr)

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EP11787894.2A EP2646511A1 (fr) 2010-12-03 2011-11-25 Composition durcissable
PCT/EP2011/070999 WO2012072502A1 (fr) 2010-12-03 2011-11-25 Composition durcissable

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DE102013216781A1 (de) * 2013-08-23 2015-02-26 Evonik Industries Ag Beschichtungsmassen
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US20140045969A1 (en) 2014-02-13
CA2818062A1 (fr) 2012-06-07

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