EP3060613A1 - Corps élastomère pour amortissement de vibrations - Google Patents

Corps élastomère pour amortissement de vibrations

Info

Publication number
EP3060613A1
EP3060613A1 EP14786605.7A EP14786605A EP3060613A1 EP 3060613 A1 EP3060613 A1 EP 3060613A1 EP 14786605 A EP14786605 A EP 14786605A EP 3060613 A1 EP3060613 A1 EP 3060613A1
Authority
EP
European Patent Office
Prior art keywords
elastomeric body
coating
flame
cycloaliphatic
elastomeric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14786605.7A
Other languages
German (de)
English (en)
Inventor
Michael Gutsch
Martin HEBER
Björn HELLBACH
Daniela BEYER
Detlef Cordts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP3060613A1 publication Critical patent/EP3060613A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C09D5/185—Intumescent paints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/05—Forming flame retardant coatings or fire resistant coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/016—Flame-proofing or flame-retarding additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0066—Flame-proofing or flame-retarding additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/40—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers consisting of a stack of similar elements separated by non-elastic intermediate layers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2300/00—Characterised by the use of unspecified polymers
    • C08J2300/26—Elastomers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/10—Enclosure elements, e.g. for protection
    • F16F2230/105—Flexible, e.g. bellows or bladder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/48—Thermal insulation

Definitions

  • Organic materials such as wood or paper are generally combustible. This applies, with a few exceptions, also for the class of plastics, ie materials based on synthetic or modified natural polymers.
  • Plastics find a variety of uses in our everyday lives. A particular use in the areas of construction and construction places special demands on the plastic materials used, which often also include sufficient fire protection. Legal regulations, standards and a number of other regulations usually describe the fire protection criteria that a plastic must fulfill in the respective application. Evidence that a plastic material meets the fire safety requirements applicable to its field of application is provided by fire protection tests that are specific to the application. Since plastics are generally flammable organic polymers, it is usually necessary to add flame retardants in order to pass the corresponding fire protection tests.
  • the flame retardants are distributed homogeneously in the actual plastic material.
  • this approach is disadvantageous from an economic point of view, since the flame retardants are needed mainly on the surface facing the fire - not, however, or in far less small dimensions, inside the plastic material.
  • Another disadvantage resulting from the homogeneous incorporation of flame retardants in plastic materials is the fact that to achieve a flame retardant finish, especially when using non-halogenated flame retardants, usually requires greater amounts of usually more than 10 wt.% Of flame retardants which significantly degrades the mechanical properties of the plastic system.
  • Flame-retardant coatings for plastics are also state of the art. From EP 2 196 492, for example, an elastomeric body for vibration damping and suspension is known, wherein the body comprises at least one layer of an elastic and flexible flame-retardant coating.
  • the flame retardant coating described there is based primarily on expandable graphites as flame retardants.
  • Expandable graphites are characterized by the fact that insulating barrier layers can be produced in the event of fire. This allows a plastic material coated with these materials to be preserved over a longer period of fire from thermal decomposition by the fire.
  • Expandable graphites or intumescent graphites are graphites which have been treated with strong acids and / or oxidants. In this case, the acids and / or oxidants intercalate between the layer planes of the graphite (intercalation) and thereby break up the layer lattice structure. Under the influence of heat, the intercalated chemicals form gaseous products that move apart the individual carbon layers and cause the individual graphite particles to swell.
  • the expansion volume is dependent on the type and amount of intercalated acid and the oxidizing agent and can be up to 400 times the original material in case of fire.
  • the flame retardant effect of the expandable graphites is based essentially on three effects.
  • the expansion of the graphite consumes heat energy and thus cools the environment.
  • non-combustible gases that dilute the combustion gases are produced during expansion.
  • the formed Dämm Anlagenen have low thermal conductivities over a large temperature interval, so that the underlying material is isolated from the external heat.
  • the expandable graphites are among the most effective known flame retardants and have been used in the art for over 25 years.
  • expandable graphites The fields of application of expandable graphites are now diverse and range from coatings for steel beams, intumescent systems for fire and smoke resistant foreclosure of pipe and cable glands (EP 2 088 183 A1), intumescent fire protection tapes for safety cabinets to flame-retardant foams for aircraft or rail vehicle seats (EP 2 260 066 A1).
  • the use of expandable graphites also has some disadvantages. Particularly disadvantageous in the use of expandable graphites is their gray to black color, which results in materials containing effective amounts of fine powder expandable graphites also being dark gray to black in color. When using coarse expandable graphites with particle sizes above 100 pm, these are recognizable as separate dots in the later material.
  • the present invention was based on the object to provide an elastomeric body for vibration damping and / or suspension, on the one hand should have a very effective flame retardant and on the other hand has a different color from the black elastomer body and delimiting flame retardant coating.
  • the elastomeric body should also be used for vibration damping and / or suspension, inter alia, for rail applications.
  • the flame retardant should be designed so that it reaches a hazard level of at least 1, but preferably 2 and more preferably 3 according to the new European standard for rail transport DIN EN 45545: 2013, requirement set R9.
  • an insulating and particularly stable insulating layer is to be formed according to the invention, which protects the elastomeric body against damage from the fire during direct flame treatment over a period of at least 20 minutes.
  • the object of the invention is to provide effective flame protection for the elastomeric component, but at the same time avoid the disadvantages of expandable graphites for flameproof coatings described above.
  • an elastomeric vibration damping and / or suspension body comprising at least one layer of a flame retardant coating covering at least a portion of the body, the elastomeric body comprising expandable graphite as the flame retardant and the proportion of expandable graphite in the coating less than 15% by weight, preferably less than 5% by weight, more preferably less than 2% by weight, even more preferably less than 1% by weight, and especially 0% by weight.
  • the elastomeric body according to the invention is characterized in that the body itself has expandable graphite as a flame retardant substance while the flame retardant coating has conventional flame retardant additives, which are preferably white and / or colorless.
  • the elastomeric body thus comprises at least one elastomeric (base) body having expandable graphite as a flame retardant substance. At least a portion of this body is further covered by at least one layer of flame retardant coating, wherein the proportion of expandable graphite in the coating comprises less than 15 wt%.
  • the elastomeric body according to the invention is able to build up an insulating barrier layer which can protect the body from damage by the flames over a period of 20 minutes. This makes it possible to reach hazard level 1, hazard level 2 and even hazard level 3 according to DIN EN 45545: 2013 requirement set R9.
  • the interference of the expandable graphite in an elastomer compound is technically easy to implement.
  • the gray or black color of the graphite is not disadvantageous, since rubber compounds for industrial applications, especially for vibration applications, are often black anyway, since the added carbon black is a very favorable filler and provides the most balanced property profile for most applications.
  • the flame retardant coating is therefore not necessarily black. This is advantageous on the one hand for aesthetic reasons, as it allows the coating color to be freely selected within the limits set by the materials used.
  • an optical difference to be arranged under the coating elastomeric body can be made - the like set out above is usually black. This is advantageous, as this can cause holes, cracks or similar damage to the coating caused, for example, by abrasion, stone chips, vandalism, chemical attack, etc., to be easily discovered during maintenance work. Also, a colored coating could serve, for example, to differentiate original parts from spare parts or to differentiate the same designs in different materials.
  • the provision of little or no amount of expandable graphite in the coating has the advantage that the electrical conductivity of the surface of the coating material is not undesirably increased, which reduces the possibility of electrochemical corrosion.
  • the expandable graphite can be introduced in a simple manner with the units commonly used for the production of elastomers (internal mixer, rolling mill, calender, extruder) in an elastomeric mixture used to prepare the body.
  • the internal mixer is preferably used for mixing in the expandable graphite.
  • the flame retardant coating for example by adding organic dyes, such as phthalocyanines, or inorganic color pigments, such as TiO 2 , C ⁇ Oz or Fe 2 O 3 .
  • organic dyes such as phthalocyanines
  • inorganic color pigments such as TiO 2 , C ⁇ Oz or Fe 2 O 3 .
  • This makes it easy to distinguish between fire-protected and (less expensive) non-fire-resistant components.
  • This can be a simple poka-yoke, which prevents a non-fire protected component from being installed in an application where fire protection is actually needed.
  • amounts of pigment from 0.1% to 5%, in each case based on the total weight of the flame retardant coating, have proven to be particularly suitable.
  • thermochromic material which indicates by a color change that the elastomer was exposed to high operating temperatures.
  • the thermochromic material can be used, for example, in amounts of from 0.1% to 5%, in each case based on the total weight of the flameproof coating.
  • the coating has several layers of different composition.
  • a second, preferably differently pigmented, protective layer can be applied to a first layer which already provides a minimum protection.
  • curative measures for example renewal of the coating, change of the component, can be initiated immediately, without the fire protection being lost.
  • curative measures can be planned when the middle layer becomes visible and can be carried out at a later time.
  • expandable graphite is used with an onset temperature> 160 ° C, preferably from 180 ° C to 250 ° C.
  • the onset temperature is defined here as the temperature at which the thermal expansion process of the expandable Graphite inserts.
  • the use of expandable graphite having a high onset temperature is advantageous because such expandable graphite does not expand during a vulcanization process.
  • elastomers are more often produced at higher vulcanization temperatures because the cure rate increases sharply with increasing temperature.
  • increasing the vulcanization temperature by 10 ° C causes about a doubling of the vulcanization rate.
  • a suitable graphite for the preferred embodiment of the invention is therefore, for example, a sulfuric acid-treated graphite having an onset temperature of about 250 ° C. It is also conceivable to use expandable graphites which contain volatile, organic acids such as acetic acid or inorganic acids such as nitric acid and have lower onset temperatures than sulfuric acid-based expandable graphites.
  • expandable graphite having an average particle size of 100 pm to 800 pm, preferably from 180 pm to 500 pm, particularly good results can be achieved since these expandable graphites have with increasing particle size higher expansion volumes, which in case of fire for the formation of a sufficiently insulating insulation layer are necessary.
  • Expandable graphites with an average particle size above 500 pm have the highest expansion volumes, but are commercially more difficult to acquire and are priced significantly higher than standard types with particle sizes of 80%> 300 pm.
  • the graphite has at least two fractions of different particle sizes.
  • the use of particles of this particle size is advantageous since, as described above, they have high expansion volumes when exposed to heat.
  • the mean particle size of the second fraction is advantageously less than 180 ⁇ m, preferably in the range of 50 ⁇ m to 120 ⁇ m.
  • the use of particles of this particle size is advantageous because with them a particularly dense insulating layer can be formed.
  • the finer graphite expands, closing gaps in the more voluminous but at the same time less dense insulating layer formed by the coarse expandable graphite. This results in a very dense and well-insulating insulating layer, which shields the underlying elastomeric body well in front of the flames.
  • bodies according to the invention which contain graphites of different particle sizes are distinguished both by a high flameproofing effect and by a high stability and density of the insulating layer formed.
  • the elastomeric body additivated with the differently sized expandable graphites with respect to their further mechanical properties such as Shore hardness according to DIN ISO 7619-1, tensile strength according to DIN 53504 (S2), elongation at break according to DIN 53504 and compression set after DIN ISO 815 (specimen B, 25% deformation, method A) does not differ de facto in view of the measurement inaccuracies and possible batch fluctuations of exclusively soot-containing elastomers.
  • Table 1 shows this with the example of a natural rubber mixture in which the soot fractions by expandable graphite were replaced (for better comparability of the formulations, the total amount of filler was kept constant).
  • the proportion of expandable graphite in the elastomeric body may vary depending on the desired mechanical properties and, in particular, the desired flame retardancy. For example, proportions in an amount of from 10% by weight to 60% by weight, preferably from 15% by weight to 35% by weight, in each case based on the total weight of the elastomeric body, have proven to be suitable.
  • the elastomeric body may contain the following polymers (abbreviations according to ISO 1629: 1995): BR, ENR, HNBR, HR, IR, NBR, NR, SBR, XNBR, ACM, AEM, EPDM, EVM (name of the polymers according to ISO 1629: 1995) and / or mixtures thereof.
  • the total polymer content based on the total weight of the elastomeric body is at least at least 33 % By weight, preferably from 40% by weight to 85% by weight, and especially from 50% by weight to 80% by weight.
  • binary, ternary or quaternary mixtures of the above-mentioned polymers can be used for the preparation of the elastomeric body.
  • the elastomeric body may include one or more main bodies that are at least partially covered by the flame retardant coating.
  • the base body consists exclusively of elastomeric materials.
  • the outer surface of the body is preferably completely covered by the flame-retardant coating.
  • the elastomeric body consists of several partial bodies.
  • the partial bodies may consist of elastomeric and / or non-elastomeric materials, for example metals, in particular steel and / or aluminum.
  • the outer surface of the elastomeric body part is covered by the flame-retardant coating.
  • the elastomeric body has a flame-retardant coating.
  • the coating may consist of a polymeric material, for example polyacrylate, polyethylene, polypropylene, polyamide, polyester, polyurethane, ethylene-vinyl acetate, polyvinyl acetate, polyvinyl chloride, polyvinyl alcohol and / or copolymers thereof and silicone.
  • a polymeric material for example polyacrylate, polyethylene, polypropylene, polyamide, polyester, polyurethane, ethylene-vinyl acetate, polyvinyl acetate, polyvinyl chloride, polyvinyl alcohol and / or copolymers thereof and silicone.
  • the flame-retardant coating consists of polyurethane and has flame retardant additives, preferably in an amount of 5% to 60%.
  • phosphorus-containing flame retardants such as red phosphorus, ammonium phosphate, ammonium polyphosphate (APP), Phosphatester of the general formula P (O) OR 1 OR 2 0R 3 (where Ri, R2 and R3 represents organic, branched or unbranched, aromatic and / or saturated aliphatic and / or unsaturated aliphatic and / or saturated cycloaliphatic and / or unsaturated cycloaliphatic, substituted and / or unsubstituted radicals having 1 to 20 C atoms and / or hydrogen atoms, which vary or may be the same), phosphonates of the general formula P (O) RiOR 2 OR 3 (where R 1 , R 2 and R 3 are organic, branched or unbranched, aromatic and / or saturated aliphatic and / or unsaturated aliphatic and / or saturated cycloaliphatic and / /
  • Ri, R 2 and R 3 are organic, branched or unbranched, aromatic and / or saturated aliphatic and / or unsaturated aliphatic and / or saturated cycloaliphatic and / or unsaturated cycloaliphatic, substituted and / or unsubstituted radicals having 1 to 20 C-atoms and / or represent hydrogen atoms which are different or may be the same), phosphoramidates of the general formula (R 1 O) (R 2 O) PONR 3 R (where R 1, R 2 , R 3 and R 4 are organic, branched or unbranched, aromatic and / or saturated aliphatic and / or unsaturated aliphatic and / or or saturated cycloaliphatic and / or unsaturated cycloaliphatic, substituted and / or unsubstituted
  • RO general formula
  • Suitable representatives of the above-mentioned phosphorus compounds according to the invention are, for example, trioctyl phosphate, tricresyl phosphate, triphenyl phosphate, ethylenediamine diphosphate (EDAP), cresyldiphenyl phosphate, 2-ethylhexyldiphenyl phosphate, tris (2-ethylhexyl) phosphate, triethyl phosphate, dimethylpropane phosphonate; b) nitrogen-containing flame retardants such as melamine, melamine derivatives (salts with organic or inorganic acids such as boric acid, cyanuric acid, phosphoric acid or pyro / polyphosphoric acid) and melamine homologues such as melam, Meiern and melon; c) mineral flame retardants such as aluminum hydroxide (ATH) or magnesium hydroxide (MDH); d) Boron-containing compounds such as borates; e) nanocomposites (
  • the acid generator is thermally split by the heat energy of the fire and releases an inorganic acid.
  • phosphorus-containing flame retardants such as, for example, ammonium polyphosphate (APP), function as acid formers, which release polyphosphoric acid in the event of fire.
  • APP ammonium polyphosphate
  • the free polyphosphoric acid reacts with the carbon source, usually a polyhydric alcohol such as pentaerythritol or starch, by depriving it of water and thereby causing the formation of carbon.
  • the carbon source usually a polyhydric alcohol such as pentaerythritol or starch
  • the propellant usually a nitrogen-containing flame retardant
  • the propellant is thermally decomposed, resulting in gaseous decomposition products which cause the carbon forming to form and thus form an insulating carbon foam.
  • the elastomeric body and / or the coating contains no or only small amounts of halogen-containing flame retardants.
  • the proportion of halogen-containing flame retardants in the elastomeric body and / or the coating is preferably less than 5 wt.% And particularly preferably 0 wt.% By formulation. This is advantageous since halogen-containing flame retardants release hydrogen halide compounds in the event of a fire, which massively increase the smoke gas toxicity. For the same reason, it is advantageous if the elastomeric body and / or the coating contains antimony trioxide or only in a small amount.
  • FIG. 1 shows the influence of a) melamine borate and b) expandable graphite on the compression set of a natural rubber mixture as a function of the amount added in phr. While the replacement of a carbon black by melamine borate leads to a significant deterioration of the compression set, the replacement of a proportion of carbon black by expandable graphite shows no negative change in the compression set.
  • the elastomeric body according to the invention can be used in the sealing area, for example in the form of O-rings. It is also suitable for the production of bellows, tubes with or without tissue reinforcement and membranes with or without tissue reinforcement. Practical experiments have shown that the body according to the invention is also outstandingly suitable for the production of components for vibration damping and / or suspension, in particular in rail vehicle construction
  • Example 1 Flame-retardant elastomer formulation for vibration applications based on natural rubber
  • the preparation of the water-based, flame-retardant coating was carried out by means of a Speedmixer from Hauschild. Impranil DLU polyurethane dispersion was placed in a polypropylene mixing can and the powdery additives were added sequentially. The mixture was thoroughly homogenized for two minutes at 2300 rpm and applied to the elastomeric body by dipping. The drying of the layer was carried out at 80 ° C in a heating cabinet. The coating forms a protective insulating layer in case of fire, effectively protecting the rubber from the flames over a period of 5 minutes.
  • Example 2 Flame retardant elastomer formulation for vibration applications based on natural rubber
  • TPU powder was dissolved in tetrahydrofuran overnight.
  • the resulting medium to high viscosity solution was placed in a mixed can of polypropylene and the powdered additives were then added sequentially.
  • the mixture was thoroughly homogenized for two minutes at 2300 rpm and applied to the elastomeric body by dipping.
  • the layer was dried under suction at room temperature and then at 80 ° C in a vacuumed heating cabinet.
  • the coating forms a protective insulating layer in case of fire, effectively protecting the rubber from the flames over a period of 5 minutes.
  • Example 3 Flame-retardant elastomer formulation for oil-resistant vibration dampers based on NBR
  • the TPU powder was dissolved in tetrahydrofuran overnight.
  • the resulting medium to high viscosity solution was placed in a mixed can of polypropylene and the powdered additives were then added sequentially.
  • the mixture was thoroughly homogenized for two minutes at 2300 rpm and applied to the elastomeric body by dipping.
  • the layer was dried under suction at room temperature and then at 80 ° C in a vacuumed heating cabinet.
  • the coating forms a protective insulating layer in case of fire, effectively protecting the rubber from the flames over a period of 5 minutes.
  • FIG. 2 shows by way of example the cross section of an elastomeric body (1) in the form of an oring or a roll spring.
  • the elastomeric body comprises a circular base body (2). This is completely covered by the flame-retardant coating (3).
  • FIG. 3 shows by way of example the cross section of an elastomeric body (1) in the form of a bellows.
  • the base body (2) is covered on the outer surface (4) of the flame-retardant coating (3), while the top (5) and the bottom (6) are not coated.
  • FIG. 4 shows, by way of example, the cross section of an elastomeric body (1) in the form of a laminated spring.
  • the Basic body (2) 5 partial body (7,8).
  • the partial bodies (7) are formed by metallic sheets.
  • the partial bodies (8) are made of elastomeric materials.
  • the partial bodies (8) are covered on the outer surfaces (4) of flame-retardant coatings (3).
  • FIG. 5 In FIG. 5, the cross-section of an elastomeric body (1) in the form of a round bearing is shown by way of example.
  • the base body (2) comprises 3 partial bodies (7, 8).
  • the partial bodies (7) are formed by metallic sheets.
  • the part body (8) consists of elastomeric materials.
  • the partial body (8) is covered on the side surface (4) by a flame-retardant coating (3).
  • FIG. 6 shows by way of example in FIG. 6 the section from a cross section of an elastomeric body (1) in the form of a conical bearing.
  • the basic body (2) comprises 3 partial bodies (7, 8).
  • the partial bodies (7) are made of metallic materials.
  • the partial bodies (8) are made of elastomeric materials.
  • the partial bodies (8) are covered on the outer surfaces (4) of flame-retardant coatings (3).

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Fireproofing Substances (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne un corps élastomère (1) pour amortissement de vibrations et/ou pour suspension, comprenant au moins une couche d'un revêtement ignifuge (3) qui recouvre au moins une partie du corps (1). Le corps élastomère contient du graphite expansible comme substance ignifuge, la proportion de graphite expansible dans le revêtement (3) étant inférieure à 15 % en poids.
EP14786605.7A 2013-10-24 2014-10-02 Corps élastomère pour amortissement de vibrations Withdrawn EP3060613A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310017570 DE102013017570A1 (de) 2013-10-24 2013-10-24 Elastomerer Körper zur Schwingungsdämpfung
PCT/EP2014/002698 WO2015058835A1 (fr) 2013-10-24 2014-10-02 Corps élastomère pour amortissement de vibrations

Publications (1)

Publication Number Publication Date
EP3060613A1 true EP3060613A1 (fr) 2016-08-31

Family

ID=51753173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14786605.7A Withdrawn EP3060613A1 (fr) 2013-10-24 2014-10-02 Corps élastomère pour amortissement de vibrations

Country Status (3)

Country Link
EP (1) EP3060613A1 (fr)
DE (1) DE102013017570A1 (fr)
WO (1) WO2015058835A1 (fr)

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Publication number Priority date Publication date Assignee Title
FR3049029B1 (fr) 2016-03-18 2018-03-09 Hutchinson Dispositif antivibratoire tenant au feu destine a une application ferroviaire
DE202017006889U1 (de) * 2017-09-25 2018-09-20 Jörn GmbH Elastomer-Metall-Lager als Lagerbauteil mit bauteilintegriertem Elastomermaterial-Brandschutz und Schienenfahrzeug
DE102021202220A1 (de) 2021-03-08 2022-09-08 Contitech Elastomer-Beschichtungen Gmbh Mikroporöse Gummiprodukte aus Halogen- und Stickstoff-freien Elastomeren mit einem Gehalt an expandierbarem Graphit
DE102021203368A1 (de) 2021-04-01 2022-10-06 Contitech Ag Artikel, insbesondere ein Luftfederbalg
CN117486227B (zh) * 2023-11-03 2025-08-05 江山捷尔世阻燃材料有限公司 含硼聚磷酸铵的制备方法及其应用

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DE19642355A1 (de) * 1996-10-14 1998-04-16 Wolman Gmbh Dr Elastische Formteile
DE10330555A1 (de) * 2003-07-06 2005-02-10 Karl Zimmermann Gmbh Feuerhemmende Massen
JP2005088559A (ja) * 2003-08-11 2005-04-07 Crk Kk 熱膨張性防火用構造体
EP2088183B1 (fr) 2008-02-11 2013-05-15 Doyma GmbH & Co Mélange ignifuge destiné à la fabrication d'un article ignifuge intumescent
US8932497B2 (en) * 2008-03-13 2015-01-13 Laxmi C. Gupta Fire retardant coatings and bodies, and methods of use
DE102008016610A1 (de) 2008-04-01 2009-10-08 Metzeler Schaum Gmbh Flammwidriger, elastischer Polyurethan-Weichschaumstoff mit reduziertem Gewicht
US20100080920A1 (en) * 2008-09-26 2010-04-01 Tony Lagrange Flame retardant coating
ES2390080T3 (es) 2008-12-15 2012-11-06 Trelleborg Industrial Products Uk Ltd Cuerpo elastomérico con recubrimiento elástico retardante del fuego
US20120153242A1 (en) * 2009-06-24 2012-06-21 Zephyros, Inc. Insulation materials
JP2012052092A (ja) * 2010-08-06 2012-03-15 Fire Proof Technology Co Ltd 難燃性樹脂組成物及びその製造方法
GB201021000D0 (en) * 2010-12-10 2011-01-26 Dartex Coatings Ltd Fire retardance

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See also references of WO2015058835A1 *

Also Published As

Publication number Publication date
WO2015058835A1 (fr) 2015-04-30
DE102013017570A1 (de) 2015-04-30

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