EP2430107A1 - Klebstoffe mit akustischer dämpfungswirkung - Google Patents
Klebstoffe mit akustischer dämpfungswirkungInfo
- Publication number
- EP2430107A1 EP2430107A1 EP09796344A EP09796344A EP2430107A1 EP 2430107 A1 EP2430107 A1 EP 2430107A1 EP 09796344 A EP09796344 A EP 09796344A EP 09796344 A EP09796344 A EP 09796344A EP 2430107 A1 EP2430107 A1 EP 2430107A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adhesive
- polymer
- adhesive according
- range
- groups
- 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- Withdrawn
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/282—Alkanols, cycloalkanols or arylalkanols including terpenealcohols
- C08G18/2825—Alkanols, cycloalkanols or arylalkanols including terpenealcohols having at least 6 carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6576—Compounds of group C08G18/69
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/69—Polymers of conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/71—Monoisocyanates or monoisothiocyanates
- C08G18/715—Monoisocyanates or monoisothiocyanates containing sulfur in addition to isothiocyanate sulfur
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- 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
- C08G2350/00—Acoustic or vibration damping material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L2666/24—Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
- C08L91/08—Mineral waxes
Definitions
- the present invention relates to an adhesive which exhibits an acoustic damping effect, i. which reduces the transmission of vibrations in the audible frequency range through the adhesive layer by absorbing such vibrations and converting them to heat.
- the adhesive is particularly suitable for adhesively bonding components in vehicle construction. In particular, it is suitable for gluing windows such as windshield, rear window, fixed side windows or the window of a vehicle roof with the vehicle frame or the corresponding disk carrier.
- the loss factor tan ⁇ is the ratio of Young's loss modulus E "to Young's storage modulus E ':
- DMA dynamic mechanical analysis
- WO 2007/039309 describes the use of special styrene-isoprene block copolymers (SIS) for the formulation of acoustically active coatings for vehicle applications.
- SIS styrene-isoprene block copolymers
- These products based on thermoplastic rubbers, can be crosslinked and, if necessary, expanded at elevated temperatures and are suitable for use in the bodyshop or in the paint line.
- the SIS copolymers used are characterized by a glass transition - associated with a maximum of the loss factor tan ⁇ - in the range of room temperature.
- the present invention provides an acoustically damping adhesive which is particularly suitable for bonding components in vehicle construction, especially for gluing in panes (pane direct glazing).
- An object of the present invention is a single- or two-component adhesive comprising a) a binder having reactive isocyanate or silane groups, b) a non-reactive polymer having a measured by DSC glass transition temperature in the range from -40 0 C to +60 0 C.
- Component a) ensures the mechanical strength of the adhesive, component b) the acoustic damping behavior.
- the binder is either in a single preparation, or it is distributed over two components in the form of different reactants.
- the term binder is used below for both types of adhesives and refers to the entirety of the reactive constituents present in the adhesive, which form the polymer network during curing.
- NCO-containing prepolymers are used as binders in one-component, moisture-curing polyurethane adhesives.
- These are reaction products of compounds having more than one H-acidic functional group, such as OH, SH, NH, or COOH groups, with an excess of polyisocyanates.
- the average molecular weight of such reaction products can be from 300 g / mol to 30,000 g / mol, the NCO functionality is usually between 2 and 4.
- OH-functional Polymers can act. These contain 2 to 10, in particular 2 to 4, OH groups per molecule.
- the OH groups may be terminal or pendant. It may be primary, secondary or tertiary OH groups, but preferred are primary or secondary OH groups.
- suitable compounds are, in addition to short-chain polyalkoxes, in particular polyols based on polyethers, polyesters, polyacrylates, polyalkylenes or polyolefins, which may be liquid, amorphous or crystalline at room temperature (22 ° C.).
- Suitable aliphatic alcohols have a molecular weight of 60 to 600 g / mol, in particular up to approximately 400 g / mol.
- linear alcohols having 2 to 30 carbon atoms are suitable, which have two to four OH groups.
- polystyrene resin also suitable as the polyol component are reaction products of low molecular weight polyfunctional alcohols with alkylene oxides, so-called polyethers.
- the alkylene oxides preferably have 2 to 4 carbon atoms.
- Such polyols have an average molecular weight between 200 and 20,000 g / mol, in particular between 500 and 6000 g / mol.
- Suitable examples are the reaction products of ethylene glycol, propylene glycol, the isomeric butanediols, hexanediols or 4,4'-dihydroxydiphenylpropane with ethylene oxide, propylene oxide, butylene oxide or mixtures thereof.
- polyether polyols are suitable.
- polyether polyols which are suitable for the purposes of the invention are formed by polymerization of tetrahydrofuran (polyTHF).
- polyTHF tetrahydrofuran
- polyester polyols are suitable. Such polyester polyols preferably comprise the reaction products of polyfunctional, preferably difunctional and / or trifunctional alcohols, with polyfunctional, preferably difunctional and / or trifunctional carboxylic acids. Instead of free polycarboxylic acids, the corresponding polycarboxylic anhydrides or corresponding polycarboxylic acid esters can also be reacted with alcohols.
- the polycarboxylic acids may be aliphatic, cycloaliphatic, aromatic or heterocyclic. They may optionally be substituted, for example by alkyl groups, alkenyl groups, ether groups or halogens.
- polycarboxylic acids examples include succinic acid, adipic acid, suberic acid, terephthalic acid, sebacic acid, phthalic acid, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, glutaric anhydride, maleic acid, maleic anhydride, fumaric acid, dimer fatty acid or trimer fatty acid, citric acid or mixtures thereof suitable.
- Alcohols which are suitable for the preparation of such polyesterpolyols are in particular hexanediol, 1,4-hydroxymethylcyclohexane, 2-methyl-1,3-propanediol, butanediol-1,4-triethylene glycol, tetraethylene glycol, ethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, dibutylene glycol and polybutylene.
- the reaction ratios between alcohol and carboxylic acids are chosen so that OH-containing polyesters are obtained.
- polyester polyols of oleochemical origin can be prepared, for example, by complete ring opening of epoxidized triglycerides of an at least partially olefinically unsaturated fatty acid-containing fatty mixture with one or more alcohols having 1 to 12 carbon atoms and subsequent partial transesterification of the triglyceride derivatives to alkyl ester polyols having 1 to 12 C atoms in the alkyl rest are produced.
- OH-functional polyesters are well known to those skilled in the art and are commercially available. Particularly suitable are two or three terminal OH-containing polyester polyols. These preferably have a molecular weight of about 200 to 10,000 g / mol, in particular from 1000 to 5000 g / mol.
- polyurethane polyols are reaction products of polyisocyanates, preferably diisocyanates, with polyols, especially diols.
- the polyols can be selected from the above-mentioned group of polyols. The amounts are chosen so that terminally OH-terminated products are obtained.
- the functionality of the PU polyols should preferably be between 2 and 4. The molecular weight results from the reaction components used.
- Such OH-terminated PU polyols are also known to the person skilled in the art.
- polystyrene resin for example, polycarbonate polyols, polyesters based on ⁇ -caprolactone and dimer diols.
- the hydroxy-functional polybutadienes as e.g. can be obtained under the trade name "poly-bd" can be used as polyols for the compositions of the invention.
- polyacetals are, for example, reaction products of glycols, e.g. Diethylene glycol or hexanediol, with formaldehyde. Polyacetals can also be obtained by the polymerization of cyclic acetals.
- isocyanate for the preparation of the PU prepolymers with reactive NCO groups from the polyols or other H-acidic reactants described above, all the Expert known monomeric di- or polyisocyanates are used. It may be aromatic, aliphatic or cycloaliphatic isocyanates.
- Suitable isocyanates are, for example, selected from the group consisting of 4,4'-diphenylmethane diisocyanate (MDI), hydrogenated or partially hydrogenated MDI (H12MDI, H6MDI), xylylene diisocyanate (XDI), tetramethylxylylene diisocyanate (TMXDI), 4,4'-diphenyldimethylmethane diisocyanate, di and tetraalkylenediphenylmethane diisocyanate, 4,4'-dibenzyldiisocyanate, 1,3-phenylenediisocyanate, 1,4-phenylenediisocyanate, the isomers of toluene diisocyanate (TDI), 1-methyl-2,4-diisocyanato-cyclohexane, 1,6-diisocyanato-2 , 2,4-trimethylhexane, 1,6-diisocyanato-2,4,4
- diisocyanates are trimethylhexamethylene diisocyanate, 1,4-diisocyanatobutane, 1,12-diisocyanato-dodecane and dimer fatty acid diisocyanate, lysine ester diisocyanate, 4,4-dicyclohexylmethane diisocyanate, 1,3-cyclohexane- or 1,4-cyclohexane diisocyanate.
- Suitable trifunctional isocyanates are those isocyanates which are formed by trimerization or ongonomisation of diisocyanates or by reaction of diisocyanates with trifunctional hydroxyl-containing compounds. Examples thereof are trimerization products of the isocyanates HDI, MDI or IPDI or adducts of diisocyanates and low molecular weight triols, such as trimethylolpropane or glycerol.
- monomeric, asymmetric diisocyanates which have NCO groups with a different reactivity towards H-acidic reactants.
- aromatic diisocyanates having differently reactive NCO groups are the isomers of TDI, NDI, 1, 3-phenylene diisocyanate or 2,4 'MDI. In this way it is possible to obtain directly prepolymers with only a small proportion of monomeric diisocyanates.
- the polyols and polyisocyanates mentioned above are used to prepare the PU prepolymers having reactive NCO groups which are suitable according to the invention as binders a) by known processes. This can be done, for example, at room temperature, but it can also be elevated temperatures are applied.
- the starting compounds generally react spontaneously with each other. However, it may also be necessary to use catalysts such as organometallic compounds or organic amino compounds.
- the known methods for removing unreacted polyisocyanates can be used. These include, for example, the thin-film distillation or the interception of the monomeric Isocyana- te by low molecular weight reactants.
- Two-component polyurethane adhesives usually consist of one component containing an NCO-containing compound and a second component providing an H-acidic reactant.
- the NCO-containing component may contain any of the above-mentioned, suitable for the prepolymer preparation di- or polyisocyanates. It may also contain one or more prepolymers already described for use in one-part adhesives.
- the second component contains one or more H-acidic components.
- these can be the same compounds as are used in the preparation of prepolymers, ie in particular di- or polyfunctional alcohols, amines, mercaptans or carboxylic acids. In most cases, longer-chain, polymeric diols or polyols are used for this purpose.
- the first component contains an NCO-containing prepolymer, short-chain compounds such as dihydric or trifunctional alcohols and amines or water are frequently used as reactants.
- the mixing ratio of the components of a 2K system depends essentially on the chosen NCO-containing and H-acidic reactants or their molecular weight. It can move in a range between about 100: 1 and 1:10. Many products use one of the two components in excess. However, it is readily possible for the skilled person also to formulate adhesives with a mixing ratio of 1: 1. Such products are also commercially available.
- silane-crosslinking polymers generally have an organic backbone, which at the ends z. B. carries alkoxy or Acyloxysilyl phenomenon. In the presence of atmospheric moisture, those polymers which have silyl groups with hydrolyzable substituents are able to condense with each other at room temperature.
- an alkoxy- and / or acyloxysilane-terminated polymer having at least one end group of the general formula (I)
- A is a divalent linking group
- R is a divalent, optionally containing a heteroatom, hydrocarbon radical having 1 to 12 carbon atoms, and
- X, Y, Z are C 1 -C 8 -alkyl, C 1 -C 6 -alkoxy or C 1 -C 8 -acyloxy radicals, where at least one of the
- the bivalent binder group A is a divalent chemical group which links the polymer skeleton of the alkoxy- and / or acyloxysilane-terminated polymer with the radical R of the end group.
- the divalent linking group A can be formed, for example, in the preparation of the alkoxy- and / or acyloxysilane-terminated polymer, e.g. as a urethane group by the reaction of a hydroxy-functionalized polyether with an isocyanato-functional alkoxysilane.
- Isocyanato-functional alkoxysilanes are short-chain, monomeric compounds having a terminal silyl group in the sense of the above definition, which contain an isocyanate function (-NCO) at at least one further point in the molecule.
- -NCO isocyanate function
- n 0 or 1
- the radical R is a divalent, optionally containing a heteroatom hydrocarbon radical having 1 to 12 carbon atoms.
- heteroatom for example, oxygen (O) or nitrogen (N) may be included.
- the hydrocarbon radical may be, for example, a straight-chain chain or branched or cyclic, substituted or unsubstituted alkylene radical.
- the hydrocarbon radical may be saturated or unsaturated.
- X, Y and Z are independently C 1 -C 6 -alkyl radicals, C 1 -C 6 -alkoxy radicals or C 1 -C 8 -acyloxy radicals. At least one of the radicals X, Y, Z must be a hydrolyzable group, ie a C 1 -C 8 -alkoxy group or a C 1 -C 8 -acyloxy group.
- hydrolyzable groups preference is given to alkoxy groups, in particular methoxy or ethoxy groups. This is advantageous since no substances irritating the mucous membranes are released during the curing of compositions containing alkoxy groups. The alcohols formed are harmless in the released amounts and evaporate.
- acyloxy groups such as an acetoxy group -O-CO-CH 3 can also be used.
- the alkoxy- and / or acyloxysilane-terminated polymer has at least two terminal groups of the general formula (I).
- Each polymer chain thus contains at least two linkage sites, where the condensation of the polymers can take place with elimination of the hydrolyzed radicals in the presence of atmospheric moisture.
- X, Y and Z are a methyl or a methoxy group.
- X, Y and Z are a methyl or a methoxy group.
- compounds having alkoxysilyl groups have different reactivities in chemical reactions. Within the alkoxy groups, the methoxy group shows the greatest reactivity. It is therefore possible to resort to such silyl groups if a particularly rapid curing is desired.
- Higher aliphatic radicals such as ethoxy bring about a lower reactivity of the terminal alkoxysilyl group compared to methoxy groups and can advantageously be used for the development of graduated crosslinking rates.
- R is a hydrocarbon radical having 1 to 6 C atoms, in particular having 1 to 3 C atoms.
- the curing speed can be be influenced composition of the composition, whereby a further design possibility for the silane-crosslinking adhesive according to the invention is opened.
- R is a methylene, ethylene or propylene radical.
- R is a methylene, ethylene or propylene radical.
- Particular preference is given to using methylene and 1,3-propylene radicals.
- Alkoxysilane-terminated compounds having a methylene group as a link to the polymer backbone - so-called ⁇ -silanes - have a particularly high reactivity of the final silyl group, which leads to shortened setting times and thus to a very rapid curing of formulations based on such polymers.
- an extension of the connecting hydrocarbon chain leads to a reduced reactivity of the polymers.
- the ⁇ -silanes - they contain the unbranched propylene radical as a link - have a balance between necessary reactivity (acceptable curing times) and delayed curing (open time, possibility of correction after bonding) on.
- A is an amide, carbamate, urea, imino, carboxylate, carbamoyl, amidino, carbonate, sulfonate or sulfinate group or an oxygen or nitrogen atom.
- the binding group A can be formed in the preparation of the silyl-terminated polymers by reacting the framework polymer with a reactive compound bearing the -R-SiXYZ sequence.
- Group A may be both distinguishable and indistinguishable from structural features occurring in the underlying polymer backbone. The latter is, for example, if it is identical to the points of attachment of the repeat units of the polymer backbone. In this case, n would correspond to the value 0. If the binding group A is distinguishable from the linking groups in the polymer backbone, n corresponds to the value 1.
- a suitable silyl group-containing monomer is, for example, vinyltrimethoxysilane.
- Another method is the grafting of unsaturated monomers such. For example, vinyltrimethoxysilane on thermoplastics, such as polyethylene.
- hydrosilylation the addition of silanes or H-silanes such as methyldimethoxysilane to carbon-carbon double bonds under noble metal catalysis.
- urethane and urea groups which can be obtained by reacting certain functional groups of a prepolymer with an organosilane which carries a further functional group.
- Urethane groups can, for. B. arise when either the polymer backbone contains terminal hydroxyl groups and as a further component isocyanatofunctional alkoxysilanes, which are also referred to as isocyanatosilanes, are used, or conversely, if a polymer having terminal isocyanate nat phenomenon, with a terminal hydroxyl-containing alkoxysilane (hydroxy) functional alkoxysilane) is reacted.
- urea groups can be obtained when a terminal primary or secondary amino group - either silane or polymer - is used which reacts with a terminal isocyanate group present in each reactant. That is, either an amino-functional alkoxysilane (aminosilane) having a terminal isocyanate group-containing polymer or a terminal amino-substituted polymer is reacted with an isocyanato-functional alkoxysilane.
- Urethane and urea groups advantageously increase the strength of the polymer chains and the entire crosslinked polymer because they can form hydrogen bonds.
- the alkoxy- and / or acyloxysilane-terminated polymer has a polyether or polyurethane backbone and the binder group A is a urethane or urea group, wherein the alkoxy- and / or acyloxysilane-terminated polymer preferably has two end groups of the general formula (I ), which have di- or trimethoxysilyl radicals, for example di- or trimethoxysilylpropyl radicals, di- or trimethoxysilylmethyl radicals.
- di- or trimethoxysilyl radicals for example di- or trimethoxysilylpropyl radicals, di- or trimethoxysilylmethyl radicals.
- the alkoxy- and / or acyloxysilane-terminated polymer has a molecular weight M n of from 4,000 to 60,000, preferably from 8,000 to 20,000.
- Two-component systems based on reactive, silane-functional binders can also be formulated. Since the crosslinking of these binders takes place via a polycondensation, and not - as in the case of polyurethanes - via a polyaddition, there is no broad range of reaction partners available. Rather, in these systems usually used water as a reactant.
- the first component thus consists of a similar formulation as a one-component adhesive.
- the second component contains as the reactive component water contained in an amount sufficient to hydrolyze the alkoxysilyl and / or acyloxysilyl groups contained in the first component.
- Such products are known to the person skilled in the art and are commercially available.
- the adhesive according to the invention is characterized in that it in the cured state of at least a temperature in the range of -10 to +50 0 C a dynamic mechanical loss factor tan ⁇ of at least 0.4, preferably at least 0.5, at a frequency in the range of 10 to 400 Hz.
- tan ⁇ a dynamic mechanical loss factor
- tan ⁇ a dynamic mechanical loss factor
- the temperature changes and, on the other, the frequency at which the maximum value of tan ⁇ is obtained. This is shown in more detail in the exemplary embodiments.
- the polymer b) is a block copolymer.
- those block copolymers are preferred which contain both an aromatic polymer block and an aliphatic polymer block.
- the aromatic polymer block may be, for example, a polystyrene block.
- the aliphatic polymer block may be, for example, a polybutadiene block or a polyisoprene block.
- Particularly preferred are block copolymers having a structure: aromatic polymer block - aliphatic polymer block - aromatic polymer block.
- SIS copolymers styrene-isoprene-styrene block copolymers
- those SIS copolymers are preferred which have a styrene content in the range of about 18 to about 25 wt .-%.
- Such SIS block copolymers are available, for example, under the trade name Hybrar TM from Kururay Europe GmbH.
- the isoprene block can be wholly or partly hydrogenated, whereby the number of carbon-carbon double bonds originally present is reduced and the thermal stability of the block copolymer is thereby increased.
- Suitable block copolymers are where the name of the monomer is in each case one polymer block of this monomer: styrene-butadiene-styrene, styrene-ethylene-propylene-styrene, styrene-ethylene-butadiene-styrene, in the case of butadiene blocks the remaining double bonds may also be fully or partially hydrogenated.
- the glass transition temperature of component b) measured by means of DSC is in the region of the ambient temperature. In temperate zones, this is over the major part of the year a temperature in the range of about -10 0 C to about 30 0 C. Therefore, such polymers are b) preferably having a measured with DSC glass transition temperature in this temperature range.
- the polymer b) can either be dispersed heterogeneously in the form of particles in the binder a) or it can be distributed homogeneously therein, the latter in particular when using polymer b) as a homogeneous mixture with high-boiling solvents, oils or plasticizers.
- these aids should have a boiling point of at least 150 ° C, preferably of at least 200 0 C and in particular of at least 250 ° C as pure substances at atmospheric pressure.
- the polymer b) is heterogeneous in the form of particles, these may on the one hand not be too large in order not to impair the applicability of the adhesive. On the other hand, they should not be too small, so that in the required weight fraction of the polymer b) in the adhesive are not too many individual particles that hinder the formation of the network of the binder a) and thus weaken the adhesive bond.
- the particles of the polymer b) have a size distribution such that at least 80% by weight of the particles have a size determinable by sieve analysis in the range from 1 ⁇ m to 500 ⁇ m, preferably in the range from 50 ⁇ m to 300 ⁇ m , If the commercial form of the polymer b) consists of larger particles, e.g. granules, they must be ground to the preferred particle size. Since the particles are elastic at room temperature, this is preferably done in the cryogenic process at low temperature, e.g. using liquid nitrogen.
- the formulation additionally contains one or more high-boiling solvents, oils or plasticizers as an additive.
- high-boiling solvents, oils or plasticizers are to reduce fogging or avoid, as pure substances at atmospheric pressure have a boiling point of at least 150 ° C, preferably of at least 200 0 C and in particular of at least 250 0 C.
- Particularly suitable in this case are those substances or mixtures which have good compatibility with polymer b) and thus make it possible to swell the particles. This partially approaches you the second-mentioned embodiment, are used in the from the outset homogeneous mixtures of polymer b) with the designated additives.
- SIS copolymers are suitable as additives, for example, high-boiling gasolines, mineral oils or process oils, which are composed of different proportions of paraffinic, naphthenic and aromatic hydrocarbons.
- high-boiling gasolines for example, high-boiling gasolines, mineral oils or process oils, which are composed of different proportions of paraffinic, naphthenic and aromatic hydrocarbons.
- Such products are available from various manufacturers under trade names such as Enerpar TM, Enerhet TM (BP AG), Catenex TM, Edelex TM, Gravex TM (Shell AG), or Nytex TM and Nyflex TM (Nynas Naphthenics AB).
- Nytex TM and Nyflex TM Nytex TM and Nyflex TM
- the glass transition temperature of the polymer b) can also be shifted, thereby achieving optimum adaptation to the desired area of application of the adhesive.
- the total amount of added high-boiling solvents, oils or plasticizers is between 1 wt .-% and 50 wt .-%, preferably between 5 wt .-% and 30 wt .-%, particularly preferably between 10 wt .-% and 20 wt. -%.
- the polymer b) is added to the adhesive not in powder form but in the form of a mixture with high boiling solvents, oils and / or plasticizers.
- Such mixtures have the advantage that they can be melted at a comparatively low temperature, preferably not more than 100 ° C.
- a simpler handling of the polymer b), preferably a SIS copolymer, as a liquid component is possible and the homogeneous incorporation into the adhesive is facilitated.
- formulations containing such meltable mixtures are characterized by a high initial strength ("green strength").
- the adhesive is processed at the appropriate temperature and shows a strong build-up of viscosity on cooling, depending on the amount of polymer b) mixture used As a result, the joining partners are fixed quickly, similar to a hot melt adhesive.
- the said high-boiling solvents, oils and / or plasticizers have already been listed above.
- the same substances can be used as in the first embodiment, in which powdered polymer b) is used.
- the adhesive contains, in particular as part of a mixture of the polymer b) with high-boiling solvents, oils or plasticizers, at least one further component which has a glass transition temperature Tg above that of the polymer b).
- Tg glass transition temperature
- the reduction of the Tg value can be compensated by the high boiler.
- the Tg value can be set very well by the quantity ratio of the components and adapted to the preferred use temperature of the adhesive.
- An additional advantage of the blends is the broader tan ⁇ peak compared to pure polymers b), such as SIS copolymers. As a result, the temperature range in which a good damping effect results, extended.
- Resins or polymers which can be mixed homogeneously with the polymer b), for example a SIS copolymer, and the high boiler used and whose glass transition temperature Tg is above that of the polymer b) are suitable as an additional component.
- the softening temperature of the additional component should not exceed that of the polymer b) if possible, but is preferably lower than this.
- Certain hydrocarbon resins which are otherwise typically used as tackifiers in adhesive formulations have proven to be suitable.
- the adhesive in addition to components a) and b) and a high boiling point solvent, oil or plasticizer, the adhesive also contains another polymer or resin, preferably a hydrocarbon resin having a DSC measured glass transition temperature higher than that by at least 10 ° C. of the polymer b), but at least 0 ° C., preferably at least 30 ° C., and at most 120 ° C., preferably at most 70 ° C.
- Suitable compounds are found, for example, under the trade name Escorez TM from Exxon Mobile Chemical, for example Escorez TM 2184, which has a softening point at 98 ° C. and a DSC-determinable glass transition temperature of 47 ° C.
- the measured with DSC glass transition temperature of the polymer b) in the range of -10 to + 30 0 C and that of said other polymer or resin in the range of +30 to +70 0 C.
- the adhesive be from 1 to 50 weight percent, preferably from 5 to 35 weight percent, and most preferably from 10 to 25 weight percent, based on the total weight of the adhesive, said further polymer or resin.
- component a) contains or represents a binder based on polytetrahydrofuran.
- the binder a) contains chains of poly-tetrahydrofuran having at their ends reactive isocyanate or silane end groups.
- end groups can be produced by reacting poly-THF polyols with a stoichiometric excess of diisocyanate (cf., Example 2) or with an excess of a silane which has groups which are reactive toward alcohol groups. This produces prepolymers based on polyTHF, which have unreacted, reactive isocyanate or silane groups at the chain ends.
- the adhesive based on its total mass at least 10 wt .-%, preferably at least 20 wt .-%, but not more than 90 wt .-%, preferably not more than 50 wt .-% poly-tetrahydrofuran Contains shares.
- the positive properties of this component on the strength of the cured adhesive are particularly evident when the adhesive contains as component b) unsaturated SIS block copolymers.
- the proportion of the binder with reactive isocyanate or silane end groups in the total adhesive is preferably at least 10 wt .-%, in particular at least 30 wt%, but preferably at most 90 wt .-%, in particular at most 50 wt .-%.
- the proportion of the non-reactive polymer b) in the total adhesive is preferably at least 5 wt .-%, in particular at least 10 wt .-%, but preferably at most 60 wt .-%, in particular at most 40 wt .-%.
- the adhesive may additionally contain solvents, oils and / or plasticizers as well as other polymer or resin having the glass transition temperature characteristics described above.
- the adhesive may also other common in the intended field of application components such as fillers, adhesion promoters, stabilizers, catalysts, pigments u.a. contain.
- the adhesive may contain typical plasticizers, such as dialkyl phthalates, dialkyl adipates, dialkyl bacates, dialkyl maleates, alkylene dibenzoates, trialkyl and triaryl phosphates, trialkyl citrates, trialkyl trimellitates or alkyl sulfonic acid esters of phenol.
- plasticizers such as dialkyl phthalates, dialkyl adipates, dialkyl bacates, dialkyl maleates, alkylene dibenzoates, trialkyl and triaryl phosphates, trialkyl citrates, trialkyl trimellitates or alkyl sulfonic acid esters of phenol.
- diisononyl phthalate diisodecyl phthalate, di (2-ethylhexyl) adipate, di (2-ethylhexyl) sebacate, di (2-ethylhexyl) maleate, dipropylene glycol dibenzoate, tricresyl phosphate, triisononyl trimellitate or Meolloll (Bayer AG).
- fillers are the various milled or precipitated crayons, carbon black, fumed silica, titanium dioxide, calcium magnesium carbonates, barite and siliceous fillers, e.g. Wollastonite, chlorite, mica, talc or kaolin.
- these fillers are dried before use with suitable methods known to those skilled in the art in order to prevent premature gelling or curing of the products.
- the pigment used is preferably carbon black, in particular dry carbon black.
- pyrogenic silicic acids, castor oil derivatives or ureas can be used in addition to carbon black.
- catalysts for curing the adhesive are tin salts and in particular organic tin compounds.
- Typical representatives are dialkyltin dicarboxylates, wherein the alkyl radical preferably has a C chain length of 2 to 8 and wherein the carboxylate anion is preferably an anion of a fatty acid having 8 to 18 carbon atoms.
- Specific examples are dibutyltin dilaurate (DBTL), dibutyltin diacetate or dioctyltin dilaurate.
- tertiary amines are also used as catalysts.
- one-component polyurethane systems e.g. Dimorpholinodiethyl ether (DMDEE).
- DMDEE Dimorpholinodiethyl ether
- two-component PU adhesives e.g. Triethylenediamine, tetramethylethylenediamine, 1, 4-diazabicyclooctane (DABCO) or 1, 8-diazabicyclo (5.4.0) undecene-7 (DBU) are used.
- the adhesives of the invention are preferably applied at elevated temperature between about 50 0 C and 100 0 C and obtained by increasing the viscosity upon cooling to ambient temperature sufficient initial strength for fixing the parts to be bonded.
- adhesives which can be applied at room temperature. After the adhesive has been applied, the curing of the one-component systems takes place by reaction with atmospheric moisture, that of the two-component systems by reacting the reactants from the two components.
- the claims relate in a two-component formulation to the composition which is present after the mixing of the two components.
- the adhesive according to the invention is preferably used for bonding components in the manufacture or repair of vehicles.
- it is suitable for gluing the discs in the Scheibendirektverglasung.
- this may concern the original equipment for the new production of a vehicle and, on the other hand, the replacement of washers in case of repair.
- Due to the adhesive used according to the invention the transmission of vibrations between the windshield and the vehicle body is considerably reduced, so that the noise level inside the vehicle is damped.
- the present invention relates to a vehicle, in particular a train carriage, a bus, a truck, a working device such as an excavator or a bulldozer and in particular a passenger car, in which at least one disc has been glued with an adhesive according to the invention.
- a granulated styrene-isoprene-styrene block copolymer with 21% styrene content and Tg 7 ° C.
- 0.3 mm 83.1%; 0.063-0.1 mm: 1 1, 8%; ⁇ 0.063 mm: 0.6%.
- Example 5 Production of SIS Copolymer-Containing Mixtures
- the raw materials listed were homogenized in a vessel with exclusion of moisture at 130 ° C. and then filled into moisture-tight containers: Mixture 5.1:
- the adhesive was filled into moisture-proof aluminum cartridges.
- the material was heated to 100 0 C.
- the adhesive was filled into moisture-proof aluminum cartridges.
- the material was heated to 100 0 C.
- the adhesive was filled into moisture-proof aluminum cartridges.
- the material was heated to 100 0 C.
- the adhesive was filled into moisture-proof aluminum cartridges.
- the material was heated to 100 0 C.
- Component B was filled into moisture-proof aluminum cartridges.
- the component was filled into moisture-proof aluminum cartridges.
- Adhesive mixture :
- the adhesive was filled into moisture-proof aluminum cartridges.
- the material was heated to 60 0 C.
- the fracture pattern evaluation was carried out according to DIN EN ISO 10365.
- Dynamic-mechanical loss factor tan ⁇ in the frequency range 1-400 Hz using a DMA device (DMA + 100, 01 dB Metravib). The values were determined in the stretch compression mode with a dynamic deformation of 0.05%.
- the geometry of the specimens was 20x10x5 mm (width x height x depth).
- the adhesives of Examples 6-12 according to the invention show distinctly higher tan ⁇ values and thus better damping properties than the standard adhesive from Comparative Example 13.
- the comparison of Examples 6 and 13 shows that tensile strength and tensile shear strength are brought about by the introduction of the SIS copolymers (and the reduction of the soot content) are significantly reduced.
- This disadvantage can be compensated for by using other types of prepolymer and / or plasticizer:
- incorporation of poly-THF prepolymer and, in particular, additional polyTHF oligomer becomes essential higher tensile and tensile shear strengths achieved than in Example 6.
- Figure 1 shows the temperature dependence of the loss factor tan ⁇ at 400 Hz for the adhesives of Examples 6, 7, 1 1 and 13. This shows the higher damping effect of the adhesives 6, 7 and 11 compared to Comparative Example 13 in the range of room temperature. It can clearly be seen that Example 7 (with paraffinic-naphthenic oil instead of diisononyl phthalate) has a particularly advantageous peak height. Example 11 (with ternary blend of SIS copolymer, paraffinic-naphthenic oil, and hydrocarbon resin) shows improved peak width.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102009002996A DE102009002996A1 (de) | 2009-05-11 | 2009-05-11 | Klebstoffe mit akustischer Dämpfungswirkung |
PCT/EP2009/066319 WO2010130298A1 (de) | 2009-05-11 | 2009-12-03 | Klebstoffe mit akustischer dämpfungswirkung |
Publications (1)
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EP2430107A1 true EP2430107A1 (de) | 2012-03-21 |
Family
ID=41621433
Family Applications (1)
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EP09796344A Withdrawn EP2430107A1 (de) | 2009-05-11 | 2009-12-03 | Klebstoffe mit akustischer dämpfungswirkung |
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US (1) | US8470928B2 (de) |
EP (1) | EP2430107A1 (de) |
DE (1) | DE102009002996A1 (de) |
WO (1) | WO2010130298A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2798130A1 (de) * | 2011-12-31 | 2014-11-05 | Saint-Gobain Performance Plastics Chaineux | Optimiertes muster einer dämpfungsschicht für wand-, boden- und deckenkonstruktionen |
JP2014234014A (ja) * | 2013-05-31 | 2014-12-15 | トヨタ自動車株式会社 | 車両用パネル構造 |
US10457805B2 (en) | 2015-02-11 | 2019-10-29 | Polyone Corporation | Damping thermoplastic elastomers |
WO2016130631A1 (en) * | 2015-02-11 | 2016-08-18 | Polyone Corporation | Sound damping thermoplastic elastomer articles |
CN107207866A (zh) | 2015-02-11 | 2017-09-26 | 普立万公司 | 阻尼热塑性弹性体 |
US10329418B2 (en) | 2015-02-11 | 2019-06-25 | Polyone Corporation | Damping thermoplastic elastomer articles with low compression set |
CN107429036A (zh) * | 2015-02-11 | 2017-12-01 | 普立万公司 | 超振动阻尼热塑性弹性体共混物 |
US10814593B2 (en) | 2016-07-25 | 2020-10-27 | Avient Corporation | Super-vibration damping thermoplastic elastomer blends and articles made therewith |
EP4349501A1 (de) * | 2021-06-04 | 2024-04-10 | Canon Kabushiki Kaisha | Reinigungselement und elastisches element |
JP7324385B1 (ja) * | 2021-09-09 | 2023-08-09 | 三井化学株式会社 | キシリレンジイソシアネート組成物、重合性組成物、樹脂、成形体、光学素子およびレンズ |
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US20060182978A1 (en) * | 2003-07-30 | 2006-08-17 | Saint-Gobain Performance Plastics | Material having sound-damping and adhesive properties |
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US4775719A (en) * | 1986-01-29 | 1988-10-04 | H. B. Fuller Company | Thermally stable hot melt moisture-cure polyurethane adhesive composition |
US4820368A (en) * | 1987-05-07 | 1989-04-11 | H. B. Fuller Company | Thermally stable reactive hot melt urethane adhesive composition having a thermoplastic polymer, a compatible, curing urethane polyalkylene polyol prepolymer and a tackifying agent |
JPH03111475A (ja) * | 1989-09-27 | 1991-05-13 | Sekisui Chem Co Ltd | 反応性ホットメルト型接着剤組成物 |
US5418288A (en) * | 1991-07-18 | 1995-05-23 | Mitsui Toatsu Chemicals, Inc. | Isocyanate resin compositions and hot melt and pressure sensitive adhesives based thereon |
DE19543192C2 (de) | 1995-11-20 | 2003-01-16 | Daimler Chrysler Ag | Fahrzeugscheibe mit einem elastischen Trägerprofil |
US6284360B1 (en) | 1997-09-30 | 2001-09-04 | 3M Innovative Properties Company | Sealant composition, article including same, and method of using same |
DE19806122A1 (de) | 1998-02-14 | 1999-08-19 | Bayerische Motoren Werke Ag | Schwingungsdämpfendes Profil |
CA2278882A1 (en) * | 1998-08-10 | 2000-02-10 | John M. Questel | Moisture curable pressure sensitive adhesives |
JP4446508B2 (ja) * | 1999-04-07 | 2010-04-07 | 日東電工株式会社 | 粘着材 |
US20040229990A1 (en) * | 2003-05-16 | 2004-11-18 | Lord Corporation | Acrylic structural adhesive having improved T-peel strength |
JP4529534B2 (ja) * | 2004-04-28 | 2010-08-25 | 東レ株式会社 | 繊維強化複合材料用熱硬化性樹脂組成物 |
ES2449515T3 (es) | 2005-10-06 | 2014-03-20 | Henkel Ag & Co. Kgaa | Reducción de la transferencia de vibraciones |
-
2009
- 2009-05-11 DE DE102009002996A patent/DE102009002996A1/de not_active Withdrawn
- 2009-12-03 WO PCT/EP2009/066319 patent/WO2010130298A1/de active Application Filing
- 2009-12-03 EP EP09796344A patent/EP2430107A1/de not_active Withdrawn
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2011
- 2011-11-08 US US13/291,418 patent/US8470928B2/en not_active Expired - Fee Related
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US20060182978A1 (en) * | 2003-07-30 | 2006-08-17 | Saint-Gobain Performance Plastics | Material having sound-damping and adhesive properties |
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WO2010130298A1 (de) | 2010-11-18 |
US8470928B2 (en) | 2013-06-25 |
US20120115998A1 (en) | 2012-05-10 |
DE102009002996A1 (de) | 2010-11-18 |
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