WO2006053901A2

WO2006053901A2 - Vibration damped laminate

Info

Publication number: WO2006053901A2
Application number: PCT/EP2005/056076
Authority: WO
Inventors: Andreas Daniel
Original assignee: Ge Bayer Silicones Gmbh & Co. Kg
Priority date: 2004-11-19
Filing date: 2005-11-18
Publication date: 2006-05-26
Also published as: DE102004055972A1; EP1858699A2; WO2006053901A3

Abstract

The invention relates to a vibration-damped laminate consisting of the following layers: (A) an external contact layer, (B) a carrier layer, (C) vibration damping layer and, optionally (D), an adhesive layer. The use of the inventive laminate in the form of the component of vibration-reducing devices is also disclosed.

Description

Vibration-dampened laminate

The present invention relates to a multi-layered laminate having vibration damping properties, which has a reduced friction contact layer and a vibration damping layer which preferably has self-adhesive properties. The laminate is particularly suitable as a handle for vibration generating devices.

From US 5,464,659 gels are known which can be attached to substrates with a silicone adhesive, such as gel combination elements.

US 20010008687A1 discloses a multilayer film with a "Pressure Sensitive Adhesive." US 5654093 describes a "Release Coating Film" with an adhesive layer in which the adhesive layer lies between the release layer and a substrate. From US 4060081 a multilayer artificial skin is known, which contains a silicone resin, however, none of these patents describes a multi-layer molded article with cushioning properties and friction-reduced surface. Gel cushions are known in the art which are converted into a viscoelastic state by cross-linking agents and in which a gradient in the crosslinking density from the inside to the outside is produced by graded concentrations of the crosslinking agent. The gel pads are more networked to the outside and thus harder, inwardly they are less networked and thus softer. The inner soft layers have vibration damping properties (Toray, US 4517238). Further disclosures of articles having one or more layers of entrapped gels are disclosed in WO 8101650 (Larson) and EP 30838. Disadvantage of these vibration damping materials is their relatively complex production. Another form of anti-vibration materials may be provided by embedding or enclosing gels or liquids through films, foil pouches or elastomeric layers. On the one hand, a disadvantage of these systems is that the surfaces still have too high coefficients of friction, and on the other hand leakage of liquids may occur due to mechanical destruction or lack of diffusion barriers. Such embedded gels or liquids must be applied to the substrate by additional measures, such as adhesive layers or customized design. Applications as a so-called Gripp element with a similar construction are mentioned in US20030235453A1 such as a recessed grip or a stylus or in WO2003011163A2, which describes an elastomeric grip of a vibration generating device, which may also be made of silicone elastomer among others.

There was therefore a desire for a vibration-damping material that on the one hand has excellent vibration-damping properties and on the other hand, a low contact friction on the surface. The material should continue to have a high stability and safety of use. In particular, it was the object to provide an article that allows to merge functional silicone materials in an article and optimize their functional contributions to the overall function of the article by design features.

The invention thus provides a laminate comprising the following layers:

(A) an outer contact layer,

(B) a carrier layer,

(C) a vibration-damping layer, as well

(D) optionally an adhesive layer. The outer contact layer (A) preferably has at least one friction-reducing additive. The friction-reducing additive is preferably formed by at least one filler. The particle size of the friction-reducing fillers is preferably in the range of d ₅₀ (measured by Coulter Counter (light scattering)) of about 1 to 500 microns, preferably 5 to 200 microns. Such particle size is preferred because smaller particles result in less reduction in friction, whereas larger particles provide unstable surfaces. Such friction-reduced layers can be constructed, for example, as described in WO 03-91349 and the prior art cited therein.

Examples of preferred fillers are silicas, quartz flours, inorganic oxides, sulfates, carbonates, thermoplastic powders, microgels, silsesquioxanes. The shape of the fillers is preferably spherical. Particularly preferred are silica gels, precipitated silicas and silsesquioxanes.

The outer contact layer preferably contains from 1 to 15 wt .-%, particularly preferably 3 to 10 wt .-% of the friction-reducing additive, based on the total weight of the outer contact layer. The amount and type of the friction-reducing additive is preferably chosen so that the addition to a reduction of the adhesive or friction force with the method described below according to FT A, is defined. Another method is the determination of the coefficient of friction COF according to ASTM D-1894.

The absolute adhesion or friction force according to FT A of the outer contact layer is preferably less than 1 N according to the methods mentioned below.

The outer contact layer has a coefficient of friction which is 50%, preferably 30%, over conventional silicone rubber such as, for example, Silopren LSR 2050.

The outer contact layer preferably has elastomeric properties. According to the invention, elastomeric properties mean that the elongation at break is more than 100% according to DIN 53501.

Preferably, the outer contact layer comprises at least one elastomer and at least one friction-reducing additive.

Preferably, the outer contact layer contains at least one elastomer selected from the group consisting of: silicone elastomers,

Polyurethane elastomers, acrylate elastomers and crosslinked polyether elastomers. Silicone elastomers, in particular of cold-crosslinking silicones, are particularly preferred. Kaltvernetzt means that the silicone rubbers are prepared via metal-catalyzed condensation reactions RTVl-K, RTV-2K, metal-catalyzed hydrosilylation, light-curing crosslinking with and without metal catalysis. The

Temperatures of crosslinking are low, in particular at 0 to 60 ° C. The crosslinking times are about 2 seconds to 24 hours.

Particularly preferred are platinum-catalyzed crosslinking silicones.

Cold-crosslinking silicone rubbers include compositions selected from the group of metal-catalyzed, addition-crosslinkable Silicone rubbers. The addition-crosslinkable silicone compositions which can be used according to the invention advantageously comprise: a) at least one alkenyl group-containing polyorganosiloxane having a viscosity range of 0.025 and 50 Pa.s (25 ° C., shear rate gradient of 1 s ^-1 ), b) at least one polyorganohydrogensiloxane, c) optionally one or more fillers , d) at least one hydrosilylation catalyst, e) optionally one or more inhibitors f) optionally further auxiliaries.

In the silicone rubber compositions used according to the invention, the alkenyl group-containing polyorganosiloxane a) has a viscosity range of 0.025 and 50 Pa.s (25 ° C., shear rate gradient D of 1 s ^-1 ) It can consist of a uniform polymer or mixtures of different polyorganosiloxanes. or al) and a2) and / or a3) exist.

The polyorganosiloxane a) preferably consists at least of the siloxane units which are selected from the group consisting of the units M =R ¹ R ₂ SiO ₁ Z ₂ , D =R ¹ RSiO ₂ / _I , T =R ¹ SiO _{3Z 2} , Q = SiO _4/2 and the divalent units R ² , wherein R, R ¹ and R ^{2 are} as defined below. The polyorganosiloxane a) can be described by the general formula (I):

[M ₃ D _b T _e Q _d ] _1n (I)

Therein, the siloxy units M ₅ D ₅ T and Q can be distributed in blocks or randomly in the polymer chain and linked together. Within the polysiloxane chain, each siloxane unit may be the same or different. The indices are preferably as follows and are expediently selected in accordance with the desired viscosity: m = 1-1000 a = 1-10 b = 0-1000 c = 0-50 d = 0-1. The aforementioned polyorganosiloxanes a) or mixtures thereof containing the polyorganosiloxanes al) and a2) preferably have a structure of the general formula (Ia) for the polyorganosiloxanes al), which are substantially linear and have a content of unsaturated organic groups, which is preferably between 0.03 and 1.0 mmol / g. The content of unsaturated organic groups refers to polymethylvinylsiloxanes and must be adapted within the given viscosity limits to siloxy groups with a higher molecular weight.

R ¹ R ₂ SiO (R ¹ RSiO) ₁₃₁ SiR ₂ R ¹ (Ia), preferably of the formula (Ia ') R ¹ R ₂ SiO (R ₂ SiO) ₁₃₁ SiR ₂ R ¹ (Ia')

R, R ¹ and R ^{2 are} as defined below and bl <1000.

In the above radicals, R is an organic group, which is preferably selected from unsubstituted and substituted hydrocarbon radicals, such as n-, iso-, tert- or C ₁ -C ₁₂ alkyl or C ₆ -C ₃₀ aryl, C ₁ -C ₁₂ alkyl (C ₆ -C ₁₀ ) aryl, which may optionally be substituted by one or more O or F atoms and are, for example, ethers. Examples of suitable monovalent hydrocarbon radicals R include alkyl groups, preferably CH ₃ , CH ₃ CH ₂ , (CH ₃ ) ₂ CH, C ₈ H ₁₇ and C ₁₀ H ₂₁ groups, cycloaliphatic groups such as cyclohexylethyl, aryl groups, such as Phenyl, aralkyl groups such as 2-phenylethyl groups. Preferred monovalent halogenated hydrocarbon radicals R have the formula C _n F _{2n + 1} CH ₂ CH ₂ - where n has a value of 1 to 10, such as, for example, CF ₃ CH ₂ CH ₂ -, C ₄ F ₉ CH ₂ CH ₂ - and C ₆ F ₁₃ CH ₂ CH ₂ -, preferred moiety is the 3,3,3-trifluoropropyl group.

Particularly preferred radical R is methyl, phenyl, 1,1,1-trifluoropropyl. In the above groups, R ^{1 is} an alkenyl-containing organic group, which is preferably selected from unsubstituted and substituted alkenyl-containing hydrocarbon radicals, such as C ₂ -C ₁₂ n-, iso-, tert- or cyclic alkenyl, vinyl, AIII, hexenyl, C ₆ -C ₃₀ cycloalkenyl, cycloalkenylalkyl, norbornenylethyl, limonenyl, C ₈ - C ₃₀ alkenylaryl, which are each substituted by one or more O or F atoms, for example, ethers.

Preferred radicals R ¹ are groups such as vinyl, allyl, 5-hexenyl, cyclohexenylethyl, limonenyl, norbornenylethyl, ethylidene norbornyl and styryl, particularly preferably vinyl.

R ² bridges two siloxy units M, D or T. In each case, the divalent units R ² bridge two siloxane units, for example -DR ² -D-. In this case, R ^{2 is} selected from divalent aliphatic or aromatic n-, iso-, tert- or cyclic Ci-Cw-alkylene, C ₆ -C ₁₄ - arylene or -Alkylenarylgruppen. Examples of suitable divalent hydrocarbon groups R ² which can bridge siloxy units include all alkylene and dialkylarylene radicals, preferably those such as -CH ₂ -, -CH ₂ CH ₂ -, CH ₂ (CH ₃ ) CH-, - (CH ₂ ) ₄ , -CH ₂ CH (CH ₃ ) CH ₂ -, - (CH ₂ ) ₆ - - (CH ₂ ) ₈ - and - (CH ₂ ) ₁₈ -cycloalkylene groups such as cyclohexylene, arylene groups such as phenylene, xylene. Their proportion does not exceed 30 mol .-% of all siloxy units. Preference is given to groups such as alpha, omega-ethylene, alpha, omega-hexylene or alpha, omega-phenylene.

The term substantially linear comprises polyorganosiloxanes a) which preferably contain not more than 0.1 mol% of siloxane units selected from the T = RSiO _3/2 or Q = SiO _4/2 units. In the polyorganosiloxanes al), the radical R is preferably present as the methyl radical with at least 90 mol% (ie, 90 to 99 mol% based on Si atoms), preferably with at least 95 mol%.

The polyorganosiloxanes al) contain at least 2 unsaturated organic radicals. Preferably, they contain from 0.03 to 1.0 mmol / g, more preferably from 0.05 to 0.8 mmol / g alkenyl groups. The content of unsaturated organic groups refers to polymethylvinylsiloxanes and must be adapted within the given viscosity limits to siloxy groups with a higher molecular weight.

The alkenyl groups may be attached either at the chain end of a silioxane molecule or as a group on a silicon atom in the siloxane chain. Preferably, the alkenyl groups are present only at the chain end of the siloxane molecule. When alkenyl groups on Silicon atoms of the siloxane chains are present, their content is preferably less than 0.01 mmol / g.

In order to improve the mechanical properties, such as the tear propagation resistance of the crosslinked products, blends of different polymers (ie there are at least 2 polymers al) or at least al) and a2) are used before with different alkenyl and / or different chain length, the total content of unsaturated groups 1.0 mmol / g in component a) suitably does not exceed.

Preferred siloxy units are, for example, alkenyl units, such as dimethylvinylsiloxy, alkyl units, such as trimethylsiloxy, dimethylsiloxy and methylsiloxy units, aryl units, such as phenylsiloxy units, such as dimethylphenylsiloxy, diphenylsiloxy, phenylmethylvinylsiloxy, phenylmethylsiloxy units.

The polyorganosiloxane a) preferably has a number of siloxy units of from 20 to 1300, particularly preferably from 100 to 800 (average degree of polymerization P _n , which relates to polymethylvinylsiloxanes and is to be adapted to higher molecular weight siloxy groups within the prescribed viscosity limits).

The alkenyl content is determined here by ¹ H-NMR-see AL Smith (Ed.): The Ana- lytical Chemistry of Silicones, J. Wiley & Sons 1991 Vol. 112 p. 356 ff. In Chemical Analysis ed. By JD Winefordner. Preferably, the alkenyl group content is represented by alkenyldimethyl-siloxy units as end-of-chain siloxy units. In these cases of severe difunctionality, the alkenyl content is also definable by viscosity. Thus, in these preferred for the polymer al) embodiment, the alkenyl content is clearly linked to the chain length or the degree of polymerization and thus the viscosity. The polyorganosiloxane al) as well as the mixture of al) and a2) have a viscosity of 0.025 to 50 Pa.s, most preferably 0.2 to 20 Pa.s at 25 ° C. Viscosity is measured according to DESf 53019 at 25 ° C. and a shear rate D = 1 s ^-1 A further class of preferred polymers a) which together with al) form component a) are branched polyorganosiloxanes a2) or a3) which, for example, increase the tear resistance or tensile strength in combination with others Polyorganosiloxanes, such as those defined above, can be used when no or little reinforcing filler of component c) is used. The polyorganosiloxanes a3), such as. Example, in US 3,284,406, US 3,699,073 discloses that contain an increased content of unsaturated radicals R ^1, but have, in contrast to this an increased proportion of branched or branching siloxane units T = RSiO _3/2 - or Q = SiO _{4 / 2} units, which are present in more than 0.1 mol%, based on the existing Si atoms. However, the amount of branching units should be limited by the fact that this component should preferably be liquid, low-melting (mp <160 ° C) or with the other polymers a) miscible, transparent silicone compositions (> 70% transmission at 400 nm and 2 mm layer thickness).

The above-mentioned highly branched polyorganosiloxanes are polymers containing the aforementioned M, D, T and Q units. They preferably have the general formulas (II), (IIa) to (IIb): [M _a2 D _b2 T _c2 Q _d2 J ₁₁₁₁ (II)

([R ₁ SiO _{3 Z 2} ] [R ³ _{O y} ₂ U ₁₁₁₁ (IIa)

{[SiO _4/2} ] [R ³ Oi / ₂ ] i [R ₂ R ¹ SiO ₂ ] o, _O -io [RSiO ₃₇₂ J _0-50 [R ₂ SiO ₂₇₂ ] o _-5OO } _m i (Hb)

wherein R ^{3 is} a C ₁ to C ₂₂ organic radical such as alkyl, aryl or arylalkyl. The radical R ³ Oy ₂ is preferably methoxy, ethoxy or hydroxy with the preferred indices nl ml = 1 to 100 nl = 0.001 to 4 a2 = 0.01 to 10 b 2 = 0 to 10 c 2 = 0 to 50 d 2 = 1.

The molar ratio M: Q can assume values of 0.1 to 4: 1 or M: T of 0.1 to 3: 1, the ratio of D: Q or D: T of 0 to 333: 1, the Units M, D and T may contain the radicals R or R ¹ . The alkenyl group-rich branched polyorganosiloxanes a3) include, in particular, liquid polyorganosiloxanes, solid resins or liquid resins soluble in organic solvents, which preferably consist of trialkylsiloxy (M units) and silicate units (Q units), and which preferably contain vinyldimethylsiloxy units in an amount of contain at least 0.2 mmol / g. These resins may also have up to a maximum of 10 mol% of alkoxy or OH groups on the Si atoms.

In the aforementioned branched polyorganosiloxanes a3), the radical R is preferably present as a methyl radical having at least 50 mol% (i.e., 50 to 95 mol% of Si atoms), preferably at least 80 mol%. The alkenyl-rich, preferably vinyl group-rich, polyorganosiloxane a3) preferably has an alkenyl group content of more than 0.35 mmol / g to 11 mmol / g, which refers to polymethylvinyl-siloxanes and is adapted within the given viscosity limits to siloxy groups with a higher molecular weight ,

The polyorganosiloxanes a) can in principle be mixed with one another in any ratio from al) to a2) or a3). The ratio al): a2) is preferably more than 2.5: 1. The mixture of polyorganosiloxanes a1) and a2) has a

Viscosity of less than 50 Pa.s at 25 ° C

In a preferred embodiment of the invention, the polyorganosiloxane a) comprises substantially linear polyorganosiloxanes al) as described above. Branched polyorganosiloxanes a2) as described above can be added to improve the mechanical properties, especially when the amount of filler c) is limited, for example, for reasons of viscosity.

Another preferred mixture of the polyorganosiloxanes a) contains two substantially linear alkenyl endstopped polyorganosiloxanes al) having different alkenyl, preferably vinyl, contents. By this measure, on the one hand, the lowest possible viscosity of the silicone composition should be specified, on the other hand, a crosslinking structure with high strength should be achieved.

The polyorganohydrogensiloxanes b) are preferably linear, cyclic or branched polyorganosiloxanes whose siloxy units are suitably selected from

M = R ₃ SiO ₂ , M ^H = R ₂ HSiO _1/2 , D = R ₂ SiO ₂ Z ₂ , D ^H = RHSiO _2/2 , T = RSiO ₃₇₂ , T ^H = HSiO _3/2 , Q = _{SiO4 /} 2 in which these units are preferably from MeHSiO or Me ₂ HSiO _{0) 5} -, units, optionally together with other organosiloxy units, preferably dimethylsiloxy units selected. The polyorganosiloxanes b) can be described, for example, by the general formula (III) in which the symbols M * for M and M are ^H , D * for D and D ^H and T * for T and T ^{H for the sake of} brevity:

[M * _a4 D * _b4 T * _c4 Q ₀₄ U (HI) m2 = 1 to 1000 a4 = 1 to 10 b4 = 0 to 1000 c4 = 0 to 50 d4 = 0 to l.

The siloxy units can be present in blocks or randomly linked in the polymer chain. Each siloxane unit of the polysiloxane chain may carry identical or different radicals. The indices of the formula (III) describe the average degree of polymerization Pn measured as the number average Mn per GPC, which relate to polyhydrogenmethylsiloxanes and are to be adapted within the given viscosity limits to siloxy groups with a higher molecular weight.

The polyorganohydrogensiloxane b) comprises, in particular, all liquid, flowable and solid polymer structures of the formula (III) having the degrees of polymerization resulting from the abovementioned indices. Preferably, the low molecular weight polyorganosiloxanes b), which are liquid at 25 ° C, i. less than about 60,000 g / mol, preferably less than 20,000 g / mol.

The preferred polyorganohydrogensiloxanes b) are structures selected from the group which can be described by the formulas (IIIa-IIIe) HR ₂ SiO (R ₂ SiO) _z (RHSiO) _p SiR ₂ H (IHa)

HMe ₂ SiO (Me ₂ SiO) ₂ (MeHSiO) _P SiMe ₂ H (HIb)

Me ₃ SiO (Me ₂ SiO) _z (MeHSiO) p SiMe ₃ (HIc)

Me ₃ SiO (MeHSiO) _p SiMe ₃ (HId) ([R ₂ YSiOy ₂ ] _0-3 [YSiO _3/2 ] [R ³ O] ₁₁₂ Jm ₂ (HIe)

{[SiO _4/2} ] [R ³ Oi / ₂ ] "2 [R ₂ YSiOy ₂ ] 0.01.10 [YSiO ₃₇₂ J _0-50 [RYSiO ₂₇₂ ] OI ₀₀₀ J ₁₁₁₂ (Uli)

z = (zl + z2) = 0 to 1000 p = 0 to 100 z + p = b4 = 1 to 1000 where R ³ Oy _{2 is} an alkoxy radical on the silicon,

Y = hydrogen (H) or R, both of which can occur simultaneously in one molecule. R is defined above, preferably R = methyl.

A preferred embodiment of the compound class (HIe) and (Ulf) are, for example, monomeric to polymeric compounds which can be described by the formula [(Me ₂ HSiO) ₄ Q] I ₁₁₂ . The SiH concentration is preferably in the range from 0.1 to 17 mmol / g, which relates to polyhydrogenmethylsiloxanes and is to be adapted within the given viscosity limits to siloxy groups having a higher molecular weight. The polyorganosiloxanes b) are preferably liquid or siloxane-soluble at room temperature, ie they preferably have less than 1000 siloxy units, ie they preferably have viscosities below 40 Pa.s at 25 ° C. and D = 1 s ^-1 .

The SiH content is determined in the present invention by ¹ H-NMR, see AL Smith (Ed.): The Analytical Chemistry of Silicones, J. Wiley & Sons 1991 Vol. 12 p. 356 et seq. In Chemical Analysis ed. By JD Winefordner.

The preferred amount of the polyorganohydrogensiloxanes b) is 0.1 to 200 parts by weight, based on 100 parts by weight of component a).

The preferred amount of the polyorganohydrosiloxanes b) is chosen such that the molar ratio of the total amount of Si-H to the total amount of Si-alkenyl in component a) is from 0.5 to 10 to 1, preferably 1.0 to 2.0 to 1, more preferably 1.1 to 1.5 to 1. The ratio of SiH to Si alkenyl units can be used to influence many properties, such as the rubber-mechanical properties, such as the rate of crosslinking and surface properties.

The silicone rubber mixtures to be used according to the invention for the contact layer a) optionally further optionally comprise one or more optionally superficially modified fillers c). These include, for example, all finely divided fillers, i. the particles are smaller than 100 μm, i. preferably consist of such particles. These may be mineral fillers such as silicates, carbonates, oxides, carbon blacks or silicas. Preferably, the fillers are so-called reinforcing

Silicas that allow the production of opaque, more transparent elastomers, ie those that improve the rubber mechanical properties after crosslinking, increase the strength, such as fumed or precipitated silica with BET surface areas between 50 and 400 m ² / g, which are preferred in special way are superficially hydrophobed. When used, the superficially modified filler is used in amounts of 1 to 100 parts by weight, preferably 10 to 70 parts by weight, more preferably 10 to 50 parts by weight, based on 100 parts by weight of component a). Fillers with BET surface areas above 50 m ² / g allow the production of silicone elastomers with improved rubber-mechanical properties. The rubber-mechanical strength and the transparency increase with, for example, fumed silicas, such as, for example, Aerosil 200, 300, HDK N20 or T30, Cab-O-Sil MS 7 or HS 5 with increasing BET surface area. Trade snamen for so-called precipitated silicas, engl. "Wet Silicas" are Vulkasil VN3 or FK 160 from Degussa or Nipsil LP from Nippon Silica KK

The highest transparency is achieved with fumed silicas having a BET surface area of more than 100, preferably more than 200 m ² / g, more preferably more than 300 m ² / g, which are dispersed in a suitable manner. Moreover, if no transparency is required , additionally or alternatively so-called non-reinforcing extender fillers, such as quartz flour, diatomaceous earths, cristobalite flours, mica, aluminum oxides, hydroxides, Ti, Fe, Zn oxides, chalks or carbon blacks with BET surface areas of 0.2-50 m ² / g. These fillers are available under a variety of trade names such as Sicron, Min-U-SiI, Dicalite Crystallite

By the term filler is meant the fillers, including their surface-bound hydrophobing agents or process aids, which control the interaction of the filler with the polymer, e.g. influence the thickening effect. The surface treatment of the fillers is preferably a water repellency with silanes or siloxanes. It can e.g. 'in situ' by adding silazanes, such as hexamethyldisilazane and / or divinyltetramethyldisilazane, with the addition of water, 'in situ' hydrophobing is preferred.

The hydrosilylation catalyst preferably contains at least one metal selected from the group consisting of Pt, Pd, Rh, Ni, Ir or Ru. The hydrosilylation catalyst can be used in metallic form, in the form of a complex compound and / or as a salt. The catalysts can be used with or without support materials in colloidal or powdered state. The amount of catalyst is preferably 0.1-5000 ppm, preferably 0.5-1000 ppm, more preferably 1-500 ppm, more preferably 2-100 ppm, calculated as metal, based on the weight of components a) to c) in front. In the group of the Pt, Rh, Ir, Pd, Ni and Ru compounds, ie their salts, complexes or metals, the component d) is selected, for example, from the Pt catalysts, in particular Pt ° complex compounds with olefins, particularly preferably with vinylsiloxanes, such as, for example, 1: 1 complexes with 1,3-divinyl-tetra methyldisiloxane and / or tetravinyltetramethyltetracyclosiloxane. These platinum catalysts are exemplified in US 3715334 or US 3419 593. The Pt preferably employed ° olefin complexes to set in the presence of 1,3-di vinyltetramethyldisiloxane (M ^Vl 2) other by reduction of hexachloroplatinic acid or from platinum chlorides ago. Likewise, of course, other platinum compounds, as far as they allow rapid crosslinking can be used, such as the photoactivatable Pt catalysts of EP 122008, EP 146307 or US 2003-0199603.

The rate of hydrosilylation is determined by the selected catalyst compound, its amount, and the type and amount of additional inhibitor component e).

The amounts of catalyst are limited by the costs incurred upwards and the reliable catalytic effect down. Therefore, amounts above 100 ppm metal are usually uneconomical, amounts below 1 ppm unreliable.

As carriers for the catalysts, all solid substances can be selected, as long as they do not undesirably inhibit the hydrosilylation. The carriers may be selected from the group of powdered silicas or gels or organic resins or polymers and used in accordance with the desired transparency, preference is given to non-opacifying carriers.

The rate of hydrosilylation reaction is known to be influenced by a number of compounds. This influences the rate of crosslinking. Further cold-crosslinking silicone rubbers may also be condensation-crosslinking polyorganosiloxane compositions from the group of the RTV IK and RTV 2K rubbers, comprising:

a) at least one crosslinkable polyorganosiloxane, b) at least one crosslinking reactive silane or siloxane crosslinker c) at least one tin-containing catalyst or at least one titanium chelate-containing or other metal catalyst, The polyorganosiloxanes of this composition crosslinkable in the ambient, ie room temperature, range preferably those of the general formula

wherein the substituents R and R ^{2 are} each independently optionally substituted Ci-Cs-alkyl, C ₆ -C ₁₄ aryl or C ₂ -C ₈ - alkenyl groups and

the substituents R ^{1 are} each independently of one another hydrogen, optionally substituted C ₁ -C ₈ -alkyl, optionally substituted C ₁ -C ₈ -alkoxy (C ₁ -C ₈ ) -alkyl, poly (alkyleneoxy) alkyl or C ₂ -C ₈ - Alkenyl are.

The substituents R ¹ , R ² and R may be the same or different. Also, the substituents R ¹ in one molecule or different molecules may be the same or different. This also applies to the substituents R ² and R. n is an integer calculated from the weight average and may preferably assume values of 50 to 2500, while a = 0, 1 or 2.

Preferably, R is a methyl group. R ² is preferably methyl. R ¹ is preferably methyl, vinyl or hydrogen.

The crosslinkable polyorganosiloxanes used according to the invention preferably have a viscosity of from 0.1 to 1500 Pa s, more preferably from 10 to 200 Pa.s. at 25 ° C.

The crosslinkable polyorganosiloxanes used in the invention may be polyorganoalkoxysiloxanes (a = 0 or 1) or alpha, omega-hydroxy. terminated polyorganosiloxanes (a = 2) act. The polyorganoalkoxysiloxanes mentioned above are prepared by the reaction of alpha, omega-hydroxy-terminated polyorganosiloxanes (a = 2) with at least two equivalents of crosslinker per molecule.

The silane / siloxane crosslinkers preferably used are preferably an organosilicon compound of the formulas

R ⁴ bSi (OR ³ ) _4-b Alkylalkoxysilanes R ⁴ _b Si (OCOR ³ ) _4- b Alkylacetoxysilanes

R ⁴ bSi (NR ³ 2) _4- b Alkyl-alkylaminosilanes R ⁴ _b Si (ON = R ³ ₂ ) _4- b Alkyl-alkyloximosilanes

R ⁴ _b Si (NHCOR ³ ₂ ) _4- b Alkyl-alkylamido or alkyl-arylamidodsilane

wherein the substituents R ^{4 are} each independently optionally substituted Ci-Cs-alkyl, C ₆ -C ₁₄ - aryl or C ₂ -C ₈ - alkenyl groups, R ^{3 is} an optionally substituted Ci-Cs-alkyl-, or C ₂ C _{8 is} alkenyl group and b is an integer of 0, 1 or 2, and condensates thereof. R ³ and R ⁴ may be the same or different from each other. The alkoxysilane / siloxane crosslinkers are particularly preferably at least one constituent selected from the group consisting of tetraethoxysilane, polysilicic acid esters, vinyltrialkoxysilanes, methoxyethyltrialkoxysilanes, methyltrialkoxysilanes, methyltrisbenzamidosilane methyltrisactecoxysilane, methyltris (trialkylamino) silane methyl tris (trialkylaminoxy) silane, methyl tris (butoximo) silane.

The amount of silane / siloxane crosslinkers used according to the invention in the compositions according to the invention is preferably at least about 0.3% by weight, at most about 10% by weight, based in each case on the total amount of the composition according to the invention. Component d) the cold-vulcanizing silicone rubbers are at least one tin-containing catalyst or at least one titanium chelate catalyst.

Catalyst.

The tin-containing catalyst is preferably a

Organotin compound. Particular preference is given to at least one organic tin compound of the formula

R _4-m SnY _n

where m is 1, 2 or 3,

R ^{6 is} selected from the group consisting of linear or branched optionally substituted Ci-Qo-alkyl groups, C ₅ -C ₁₄ -cycloalkyl or C ₆ -C ₁₄ - aryl groups, triorganylsilyl and diorganyl (C ₁ -C ₃₀ ) alkoxysilyl groups and when a plurality of substituents R ^{6 are} present, they may be the same or different from each other, and Y is selected from the group consisting of halogen, -OR ⁷ , -OC (O) R ⁸ , -OH, -SR ⁹ , -NR ¹⁰ ₂ , -NHR ¹¹ , -OSiR ¹² ₃ , -OSi (OR ¹³ ) ₃ ,

The linear or branched optionally substituted Ci-Qo-alkyl groups mentioned in the definition of the above-mentioned organic tin compounds include those having 1 to 30 carbon atoms, such as methyl, ethyl, chloroethyl, n-propyl, iso-propyl, n-butyl iso-butyl, pentyl, hexyl, heptyl, ethylhexyl, octyl, decyl, undecyl, dodecyl, tridecyl, etc. Preferred is butyl, hexyl or octyl.

The C ₅ -C ₁₄ cycloalkyl groups mentioned in the definition of the above organic tin compounds include mono- or polycyclic alkyl groups. Preferred tin compounds include dioctyltin oxide, dibutyltin oxide, dimethyltin oxide, dimethyltin dichloride, dibutyltin dichloride, tributyltin chloride, dibutyltin dilaurate, dibutyltin diacetate, dibutyltin maleate, Dibutylzinndihexanoat, dibutyltin dioctoate, Dioctylzinndioctoat, dioctyltin Dioctyldibutoxystannan and / or Tributylethoxystannan. Further, as tin-containing catalysts reaction products of the above-described organotin compounds with one or more silicic acid esters, polysilicic acid esters, organylalkoxysilane and / or in each case their Teilhydrolysate be used. The amount of the tin-containing catalyst in the polyorganosiloxane composition of the invention is at least about 0.2% by weight. The maximum is about 5 wt .-%.

The titanium chelate catalysts which can be used according to the invention are known per se and are described, for example, in US 4680364 US 3689454, US 3334067, DE 19 507 416 and US 4438039.

The optionally present filler is selected from the group of amorphous or crystalline, reinforcing or non-reinforcing silicas, silicates, oxides, carbonates, as defined above for the addition-crosslinkable silicone rubbers. For transparent polyorganosiloxane compositions in particular pyrogenic hydrophobic or hydrophilic silicic acids having BET surface areas of 90 to 400 m ² / g come into question. The cold-vulcanizing polyorganosiloxane composition preferably contains: a) from 30 to 99.3% by weight of at least one crosslinkable polyorganosiloxane, b) from 0.3 to 10% by weight of at least one silane / siloxane crosslinker, c) from 0.2 to 5% by weight at least one tin-containing catalyst or at least one Ti-chelate-containing catalyst, d) 0 to 60 wt .-% of a filler, e) 0 to 50 wt .-% of an adjuvant selected from non-crosslinkable

Siloxanes, adhesives, fungicides, solvents and / or pigments. The combination of the abovementioned components a) to g) of the composition of the invention can be conveniently carried out by first combining the components a), b) and c) and adding the remaining components to the mixture of a), b) and c) added. Preference is given to the mixture of a), b) and c) components g) and h) next, and finally components e) and d) and finally f) are added to the resulting mixture.

The polymers on which the elastomers are based have a viscosity of advantageously less than 50,000 mPas at 20 ° C. Optionally, the viscosity can be lowered by additional solvents. If polymers with higher viscosity are used, the desired friction properties can only be limited. Preferably, the mixtures are adjusted with a solvent to viscosities of less than 5000 mPa.s 20 ° C, more preferably less than 500 mPa.s, more preferably less than 50 mPa.s at 20 ° C. The thickness of the outer contact layer is preferably at least 0.01 mm, wherein a thickness of 0.5 mm is preferably not exceeded. Although it is also possible to produce mechanically strong contact layers from suitable polymer compositions in individual cases. This is e.g. possible if the binder matrix for the friction-reducing fillers on the one hand sufficiently low viscosity but at the same time mechanically strong enough, as can be achieved for example by selecting suitable polymers.

In the laminates but preferably a separate contact and carrier layer, the latter used to increase the mechanical strength. The carrier layer (B) consists of at least one material selected from the group consisting of elastomers, textile fabrics and thermoplastic films. Laminates with a carrier layer of a silicone elastomer are preferred here. Depending on the strength and rigidity of the carrier layer, this carrier layer has a thickness of at least 0.05 mm. At most, this layer is 6 mm, more preferably at most 2 mm, more preferably at most 1 mm thick.

The backing layer (B) of the laminate preferably consists of at least one material selected from the group consisting of elastomers, textile fabrics and thermoplastic films. Preferably, a silicone elastomer is also used here as a carrier layer. This silicone elastomer differs from the silicone elastomers called for the contact layer by an extended one

Range of silicone polymers, fillers, crosslinkers and catalysts and theirs underlying crosslinking process, since any prefabricated elastomer plates or films can be used here. The silicone polymers thus follow the definition as for the contact layer, but the average chain length can be values up to 10,000 or viscosities of up to 100 kPa. at 20 ° C. and at a shear rate of 1 s ^-1 . Peroxides can also be used as crosslinking agent or catalyst.

The carrier layer typically has tensile strengths of more than 4 N / mm ² and preferably has a transparency as transmission measured of more than 10% at 1 mm. The function of the carrier layer can also be taken over by any textile fabrics if they have a thickness of less than 1 mm and do not significantly affect the vibration-damping properties of the subsequent layer. Likewise, here films of thermoplastic materials are used, such as polyolefins, polyimides or polyurethanes, as far as the films do not significantly reduce the vibration damping behavior of the subsequent layer. Suitably, the thickness of these films will be from 0.01 to 0.7 mm. For the preparation of the composite with the other layers, a chemical or physical surface treatment optionally with primers or adhesives.

As vibration-damping layers, all the aforementioned elastomers of the support layer can be used, wherein the crosslinking density or the degree of crosslinking must be selected to be lower than in the support layer to viscoelastic

To create properties. The thus achievable viscoelastic properties are characterized in that the loss factor (tan delta) is preferably at least 0.2, more preferably at least 0.5 (DIN EN ISO 6721-1).

Preferred materials constituting the vibration damping layer are selected from the group consisting of silicone elastomers, polyurethanes, polyethers, acrylic elastomers. Addition-crosslinked silicone rubbers in which the ratio of Si-alkenyl to SiH is greater than 1 are particularly preferred. More preferably, the ratio is greater than 2, more preferably greater than 3. It is further preferred that more than 30 mole% of the SiH groups are in the form of difunctional crosslinker molecules. In addition, this layer may also have self-adhesive properties, which is preferred, as this adhesion to the vibrating device is produced without additional adhesive layer. Self-adhesive properties in the sense of the invention mean that the layer preferably has an adhesive force measured by Finat test method FTM 1 against glass of at least 500 cN / inch, preferably more than 700 cN / inch.

Preferably, the thickness of the vibration damping layer is at least 1 mm, more preferably at least 2 mm, more preferably at least 3 mm. In a particularly preferred embodiment of the laminate according to the invention, both the outer contact layer and the carrier layer and the vibration-damping layer of silicone elastomers, which differ in their composition but so that the outer contact layer has corresponding friction properties, the carrier layer has the required mechanical strength and the vibration damping layer has the necessary damping properties.

The laminate according to the invention is preferably transparent, wherein the transparency is limited by the filler-containing outer contact layer. The transparency as transmission measured in a photometer at a wavelength of 400 nm is preferably at least 10%, more preferably at least 20% measured at a layer thickness of the outer contact layer of 0.3 mm, a layer thickness of

Carrier layer of 1 mm and a layer thickness of the damping layer of 5 mm. Transparent laminates have, in particular, practical advantages in that, for example, they can be adjusted to be transparent in color and are transparent, as a result of which backlighting is possible, for example. The invention further relates to a method for producing the laminate according to the invention, comprising the steps of: a) providing the carrier layer, b) applying the outer contact layer, c) applying the vibration-damping layer. The invention further relates to the use of the invention

Laminates as a vibration damping element as part of a Vibration generating device. Such vibration generating devices include razors, tools, machines, machine control levers, surgical instruments, sports equipment, medical articles such as orthopedic insoles, shoe inserts, saddles such as bicycles, seats such as seats of vibrating devices such as vehicles, steering wheels, control levers and writing tools.

A particularly preferred use of the laminate according to the invention is a vibration-damping element in the form of a handle of a vibration-generating device, in particular a razor. The use of the laminate according to the invention as a grab handle of a shaver combines the advantages of a pleasant surface grip with excellent damping of the vibrations.

In a preferred embodiment of the laminate according to the invention, at least one end face of the vibration-damping layer (C) is enclosed by a material selected from the group consisting of: the contact layer (A), the carrier layer (B) and / or a frame material ( e). In a particularly preferred embodiment, the contact layer (A) comprises the vibration-damping layer (C) and the carrier layer (B) (see Fig. 3). Furthermore, the laminate can be bounded by a frame material (E) (Fig. 3).

EXAMPLES

Example 1 :

Composition of a friction-reduced contact layer Top Coat '

Low-viscosity silicone elastomers which are applied as a two-component material to a thin layer, for example by spraying or dipping, and hardened at 25 ° C. for 2 hours are suitable for these antiblocking friction-reducing layers.

Partial mixture Al from Tab. 1

In a stirred pot, the amount of decamethylcyclopentasiloxane D5 mentioned in Table 1 is mixed with the amounts of a catalyst consisting of a linear vinyl-stopped polydimethylsiloxane having the viscosity 1 Pa. s at 25 ° C with a vinyl content of 0.13 mmol / g and a

Tetravinyltetramethyltetrasiloxane platinum-O complex with a Pt content of 1 wt.% Is.

Blend Bl Tab.l

The sub-mixture B is composed according to Tab.l and consists of a mixture of 75 parts by weight of a dimethylvinyl-siloxy-terminated polydimethylsiloxane (al) having a viscosity of 7.5 Pa.s (25 ° C) with 50 parts by weight of a solvent-containing 50% QMMvi silicone resin (a3) in toluene with a vinyl content of 0.71 mol / g. The mixture (a1) and (a3) has a total vinyl content of 0.19-0.23 mol / g. To this are further added Decamethylcyclopentasiloxan D5, and a dimethylvinyl-siloxy endstopptes co-polydimethyl-vinylmethylsiloxane (a2) having a vinyl content of 2.1 mmol / g and a viscosity of 200 mPa.s at 25 ° C with these components with exclusion of air an anchor agitator are mixed in a stirred pot under Luftauschluß. For this purpose, further mixed as a friction-reducing filler precipitated silica OLK 412 (Degussa) and a crosslinking reaction (Hydrosilylation) retarding inhibitor (s). Finally, the addition of the crosslinker components (bl) and (b2) takes place. The crosslinker (bl) consists here of a trimethylsiloxy end-stopped polyhydrogen-methyl-siloxane of the formula M ₂ D ¹ ^ ₀ with 15.5 mmml / g SiH and a viscosity of 15 mPa.s at 25 ° C. The crosslinker (b2) consists of a dimethylhydrogensiloxy-endstopped poly-methylhydrogen dimethylsiloxane having the viscosity 30 mPa.s at 25 ° C with a SiH content of 4.3 mmol / g of the general formula M ^H 2D2 ₀ D ^H ₁₀₎ wherein the SiH units are randomly distributed.

The two partial mixtures are mixed together in accordance with the conditions given in Tab. 1 and applied to a plate consisting of a silicone elastomer, as defined for the carrier layer by spray application to a 20-100 micron thick layer and then cured at 25 ° C for 6 h and dried.

Tab. Ia

The layer then had the following properties: Tab. Ib

) * COF measured via model SP-IOIB Slip / Peel tester in accordance with ASTM D-1894

The contact layer has been reduced by spray application by 30% to 50%

Coefficient of friction when measured after 20 minutes / 140 ° C.

Example 2: Preparation of a carrier layer (B) of addition-crosslinked liquid silicone rubber.

Partial mixture A2 (amounts: see Table 2a)

In a kneader is ever a dimethylvinylsiloxy endstopptes polydimethylsiloxane (al) having a viscosity of 10 Pa.s or 65 Pa.s at 25 ° C, wherein 80% of the amount of polymer from Tab. 2a are used, hexamethyldisilazane, 1.3- Divinyltetramethyldisilazane and water mixed, then with pyrogenic silica (c) with a BET surface area of 300 m ² / g mixed, heated to about 100 ° C, stirred for about one hour and then at 150 ° C to 160 ° C of water and excess silane / silanol residues by evaporation (finally vacuum at p = 20 mbar). It is then diluted with the remainder of the polymer (a1) and (a2).

Partial mixture B2 (quantities: see Table 2a)

As above, the amounts shown in Table 2a were mixed together. Tab. 2a

The components A2 and B2 are then mixed in a ratio of 1: 1 mixed with a kitchen mixer (Krupps) and then painted in a mold cavity to produce a test plate Ix 180 x 250 mm. The mixture was cured under pressure of 60 bar 170 ° C for 10 min.

The elastomer plates produced in this way were used in the further experiments.

Tab. 2b

Example 3 Composition for a vibration-damping layer (gel)

The compositions preferably used for this purpose have a defined degree of crosslinking, which is generally lower than that in the elastomers for the reinforcements. The networking causes i.a. that as far as possible no liquid components escape from this layer.

Partial Mixture A3 An anchor stirrer is used to mix the parts by weight of a dimethylvinylsiloxy-endstopped polydimethylsiloxane (al) in Tab. 3 with a viscosity of 10 Pa.s at 25 ° C. and the solution of the platinum-siloxane complex.

Partial mixture B3

In a second vessel, the Gew.teile mentioned in Tab. 3 of dimethylvinylsiloxy endstopptes polydimethylsiloxane (al) with said amounts of the two crosslinkers (bl) and (b2) consisting of Dimethylhydrogensiloxy- endstopped polydimethylhydrogen-methylsiloxane with the viscosity 1000 mPa .s at 25 ° C with a SiH content of 0.12 mmol / g of the general formula M ¹ ^ D _20O for (b2) and a dimethyl-hydrosiloxy endstopptem polysiloxane having a SiH content of 9.3 mmol / g 30 mPa.s at 25 ° C of the general formula [M ^H _{1) 7} Q] _X.

Tab. 3a

The curing of the composition for a vibration damping layer may be in a mold provided with a mold release agent or a coating. The two sub-mixtures A3 and B 3 of Example 3 were filled after mixing with a kitchen blender and in a coated metal mold with a cylindrical mold nest with a height of 60 mm and an area of 100 x 100 mm. After a rest period of about 5 minutes, freedom from bubbles is achieved as far as possible. The properties were measured after 6 h 25 ° C at the surface (Tab.4 a, sample 2 A).

Example 4

Production of a Laminate of the Invention (Sample 2 (D)): According to Example 3, first a mold cavity is filled with the rubber for the vibration damping layer corresponding to a dry thickness of 4 mm. In the not yet cured layer put a 1 mm thick rubber plate of

Composition of Example 2. Next, spray onto the support layer (B) which is not covered by the composition of Example 1. The contact layer (A) became 50 μm after drying for 6 hours / 25 ° C.

The samples (2 A-C) were prepared leaving the respective layers with a thickness of ± 0.5 mm for the layer (C).

Example 5:

The production of test specimens and determination of the adhesive and frictional force was carried out in a Trennkraftmeßgerät Fa. Schreiner type FT-2A (5N - 50N

Load cell).

For the assessment, an adhesive tape called TESA 7475 with the

Dimensions 2cm x 2.4cm cut. On the adhesive side of the tape, a weight of 50 g was attached. With the appropriate pulling device pulled the weighted tape over the respective surfaces of the specimens. The resulting values are listed in Tab. 4a and 4b. Examples of force-time diagrams are shown by way of example in FIGS. 1 to 2. Tab. 4a

The vibration-damping behavior was evaluated by frequency-dependent deformation or shear. For this purpose, the samples were subjected to a maximum deflection of 0.1 mm at room temperature (20 ° C.) in a frequency range from 0.01 Hz to 1000 Hz with a force limitation of 0.5 N during the measurement. Table 4b reproduces the evaluation with a broadband spectrometer from Mettler, which was used as a measuring apparatus.

The determination of the surface characteristic in Tab. 4b was made by subjective perception by sliding the finger.

Fig. 1: Adhesive and friction force diagrams (force-time curves) ⁽ sample 2C ⁾

Load cell 5O N

Feed 300 mm / min

Date 01 10 2004

REQUIREMENTS:

filename

material number

lot number

roll number

Minimum value [N] 0

Maximum value [N] 50

Material width [mm] 25

COMMENT:

7

6

-. 5 ϊ S ⁴ 3

<2

1

0 0 10 20 30 40 50

Feed path [mm]

RESULT:

Mean value [N] 3 27

Minimum value [N] 2 31

Maximum value [N] 6 13

Mean value per cm 1 31

Fig. 2: Adhesion and friction force diagrams (force-time curves) Sample 2 A

FT-2A PROTOCOL

Load cell 5O N

Feed 300 mm / min

Date 01 10 2004

REQUIREMENTS:

File name Mateπal number Batch number Roll number Minimum value [N] 0 Maximum value [N] 50 Mateπalbreite [mm] 25

COMMENT:

0 25

0 20

0 15

0 10

0 05

0 00

0 5 10 15 20 25 30 35

Feed path [mm]

RESULT:

Mean value [N] 0 178

Minimum value [N] 0 147

Maximum value [N] 0 208

Mean value per cm 0 0713

Material OK Yes O No O Fig. 3: Possible structures of the laminate

Frame type d)

Claims

CLAIMS:

A laminate comprising the following layers: (A) an outer contact layer, (B) a carrier layer,

(C) a vibration-damping layer, as well

(D) optionally an adhesive layer.

2. A laminate according to claim 1, wherein the outer contact layer contains at least one friction-reducing additive.

3. Laminate according to claim 1 or 2, wherein the friction-reducing additive is formed by at least one filler.

4. Laminate according to one of claims 1 to 4, wherein the outer contact layer has a coefficient of friction measured according to DIN 53375 of less than 0.5.

A laminate according to any one of claims 1 to 4, wherein the outer contact layer has elastomeric properties.

A laminate according to any one of claims 1 to 5, wherein the outer contact layer consists of at least one elastomer and at least one friction reducing additive.

The laminate of any one of claims 1 to 6, wherein the outer contact layer contains at least one elastomer selected from the group consisting of: silicone elastomers, polyurethane elastomers, acrylate elastomers, crosslinked polyether elastomers.

The laminate of claim 7, wherein the elastomer is selected from cold-curing silicones.

9. Laminate according to one of claims 1 to 8, wherein the thickness of the contact layer is at least 0.01 mm.

A laminate according to any one of claims 1 to 9, wherein the backing layer is composed of at least one material selected from the group consisting of elastomers, textile fabrics and thermoplastic films.

A laminate according to any one of claims 1 to 10, wherein the carrier layer is a silicone elastomer.

12. Laminate according to one of claims 1 to 11, wherein the thickness of the support layer is at least 0.05 mm.

A laminate according to any one of claims 1 to 12, wherein the vibration damping layer has self-adhesive properties.

14. Laminate according to one of claims 1 to 13, wherein the vibration-damping layer has a loss factor (tan delta) of at least 0.2.

The laminate according to any one of claims 1 to 14, wherein the thickness of the vibration-damping layer is at least 0.5 mm.

The laminate of any one of claims 1 to 15, wherein the vibration damping layer is comprised of at least one material selected from the group consisting of silicone elastomers, polyurethanes, polyethers, acrylic elastomers.

The laminate according to any one of claims 1 to 16, wherein the outer contact layer, the support layer and the vibration damping layer are made of silicone elastomers differing in composition.

18. Laminate according to one of claims 1 to 17, that is transparent.

19. A laminate according to claim 1, wherein at least one end face of the vibration damping layer (C) is enclosed by a material selected from the group consisting of: the contact layer (A), the backing layer (B) and / or a frame material ( e).

20. A laminate according to any one of claims 1 to 19, wherein the contact layer (A) comprises the vibration damping layer (C) and the backing layer (B).

21. Laminate according to claim 1 to 19 wherein the laminate of a frame material (E) is limited.

22. A method for producing the laminate according to one of claims 1 to 21, comprising the steps of: a) providing the carrier layer, b) applying the outer contact layer, c) applying the vibration-damping layer.

23. Use of the laminate according to one of claims 1 to 21 as a vibration damping element as part of a vibration generator

Contraption.

24. The use of the laminate according to claim 21, wherein the vibration generating device is selected from the group consisting of shavers, tools, machines, machine control levers, surgical instruments, sports equipment, medical articles, shoes, Saddles, as for bicycles, seats, steering wheels, control levers and writing tools consists.

Use according to claim 23 or 24, wherein the vibration damping element is a handle of a vibration generating device.

26. A handle for a vibration generating device formed from the laminate according to any one of claims 1 to 21.