Classifications

• • 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
  • C08K3/06—Sulfur
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
  • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
  • B32B25/18—Layered products comprising a layer of natural or synthetic rubber comprising butyl or halobutyl rubber
• • 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
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
• • 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
  • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
  • C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
• • 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
  • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
  • C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
  • C08K5/40—Thiurams, i.e. compounds containing groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
  • C08L9/02—Copolymers with acrylonitrile
• • 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
  • C09K3/00—Materials not provided for elsewhere
  • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2581/00—Seals; Sealing equipment; Gaskets
• • 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
  • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
  • C09K2200/02—Inorganic compounds
  • C09K2200/0204—Elements
  • C09K2200/0208—Carbon
• • 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
  • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
  • C09K2200/02—Inorganic compounds
  • C09K2200/0239—Oxides, hydroxides, carbonates
• • 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
  • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
  • C09K2200/02—Inorganic compounds
  • C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
  • C09K2200/0247—Silica
• • 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
  • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
  • C09K2200/04—Non-macromolecular organic compounds
  • C09K2200/0447—Fats, fatty oils, higher fatty acids or derivatives thereof
• • 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
  • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
  • C09K2200/04—Non-macromolecular organic compounds
  • C09K2200/0488—Sulfur-containing compounds
• • 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
  • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
  • C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
  • C09K2200/0607—Rubber or rubber derivatives
  • C09K2200/0612—Butadiene-acrylonitrile rubber
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
  • Y10T428/254—Polymeric or resinous material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31678—Of metal
  • Y10T428/31692—Next to addition polymer from unsaturated monomers
  • Y10T428/31696—Including polyene monomers [e.g., butadiene, etc.]

Definitions

• the present invention relates to a rubber-metal laminate. More particularly, the present invention relates to a tolyl rubber metal laminate which is effectively used as a sealing material or the like.
• nitrile rubber metal laminate for example, a laminate of a tolyl rubber vulcanized material with an adhesive interposed on a metal plate as shown in Patent Document 1 or the like is used.
• Patent Document 1 Japanese Patent Application Laid-Open No. 2000-6308
• tetramethyl thiuram disulfide (Ouchi emerging sciences product Noccellor TT) is used as a vulcanization accelerator.
• trosodimethylamine which is generated when used, trosodetilamine, N-nitrosodibutylamine, N-nitrosopiperidine, N-nitrosomorpholine, N-nitrosomethylphenylamine, and trosoetylfelamine are dangerous.
• It is a troposamine that is subject to regulation under the German law which set technical rules for substances, Article No. 552 (TRG S 552) of Technische capturing for realstoffe, and also the chemical release and transfer notification system (Polutant Release and It is considered as a target substance of Transfer Register (PRTR) and is currently reduced voluntarily.
• PRTR Transfer Register
• the object of the present invention is to reduce the vulcanizability physical property and the vulcanisation rate, and the target substance such as TRGS 552, PRTR-forming a rubber layer on a metal plate without generating trosoamine,
• An object of the present invention is to provide a tolyl rubber metal laminate that can be effectively used as a sealing material. Means to solve the problem
• a compelling object of the present invention is (B) 0.1 to 5 parts by weight of (A) -tolyl rubber and (C) tetrabenzyl thiuram disulfide, tetrakis (2-ethyl).
• This is achieved by a rubber-metal laminate in which a rubber layer is formed on a metal plate, as a layer forming component.
• the rubber-metal laminate of the present invention is a target substance such as TRGS 552, PRTR, etc., which does not reduce the vulcanization properties and the vulcanization rate when forming the rubber layer to be laminated on a metal plate!
• Various types of effects are produced, such as not producing trosoamine.
• Component (A)-Tolyl rubber (NBR) has a combined acrylonitrile content of 18 to 48%, preferably 31 to 42%, and a viscosity of one to one ML (100 ° C.) of 30
• Vulcanization of NBR can be carried out by combining optional vulcanization systems such as force peroxide vulcanization which is carried out by aqueous vulcanization.
• the blending of the component (B), which is a component is used in a proportion of 0.1 to 5 parts by weight, preferably 1.5 to 3 parts by weight, per 100 parts by weight of the NBR. If the ratio is less than this range, the crosslink density decreases and the abrasion resistance deteriorates, and the rubber exfoliation at the time of compression becomes a problem, while if it is more than this range, the rubber hardness increases and the seal Sex becomes bad.
• a vulcanization accelerator which does not generate trosoamine which is subject to regulation of TRGS 552, for example, N-cyclohexyl-2-benzothiazolylsulfenamide, N-tert-butyl-2-benzothiazolylsulfenamide, ⁇ ⁇ ⁇ , ⁇ '-dicyclohexyl-2-benzothiazolylsulfenamide, hexamethylenetetramine, ⁇ -butyraldehyde ⁇ ⁇ ⁇ ⁇ -phosphorus, ⁇ , ⁇ ' -Diphenylthiourea, ⁇ , ⁇ '-Jetylthiourea, 1,3-di-0-tolyguadine, 1,3-difluorazine, di- 0-tolyguadine salt of dicatechol borate, 1 0-Tolylbiguanide, zinc butylxanthogen
• vulcanization accelerators By using these vulcanization accelerators in combination, it is possible to improve the vulcanization rate and the crosslinking density.
• di-2-benzothiazolyl disulfide and 2-mercaptobenzothiazole are further added. By doing this, the curing rate can be delayed without lowering the crosslink density, and the curing rate can be adjusted to an optimum rate.
• a vulcanization accelerator other than the component (C) is used, the rubber vulcanizate is inferior in the abrasion resistance and the obtained rubber vulcanizate because the crosslinking density is slow and the vulcanization speed is not increased.
• a rubber-metal laminate it is not preferable to use a rubber-metal laminate to be a rubber layer alone, since the rubber breaks and flows when pressurized.
• These vulcanization accelerators used in combination with the above component (C) are used in a proportion of 10 parts by weight or less, preferably 1 to 7 parts by weight, per 100 parts by weight of NBR.
• the component ( ⁇ ) as a vulcanizing agent and the component (C) as a vulcanization accelerator are added as essential components to NBR, but in addition to silica and acid aluminum, Reinforcing agents such as activated calcium carbonate, fillers such as talc, clay, graphite and calcium silicate, processing aids such as stearic acid, palmitic acid, and raffin wax, zinc oxide, magnesium oxide,
• Reinforcing agents such as activated calcium carbonate, fillers such as talc, clay, graphite and calcium silicate, processing aids such as stearic acid, palmitic acid, and raffin wax, zinc oxide, magnesium oxide
• a variety of compounding agents generally used in the rubber industry such as acid acceptors such as hydrotalcite and antioxidants, plasticizers such as diorcyl sebacate, and the like are appropriately added and used.
• silica and aluminum oxide are preferably added for the purpose of improving the abrasion resistance, the adhesion to the adhesive layer and the like.
• Patent Document 2 discloses carbon black 30 to 100 with respect to 100 parts by weight of NBR having an attril ported 2-tolyl content of 20 to 35% by weight.
• An abrasion resistant NBR composition for reciprocating seals is described which contains parts by weight and 5 to 150% by weight of chromium oxide relative to the carbon black.
• Patent Document 2 Japanese Patent Publication No. 6-74352
• the sealing property may be reduced if the rubber flows or peels.
• parts where temperature changes become large such as engine gasket parts
• fretting between the joint surfaces of the engine and the gasket is caused due to the temperature changes, and this fretting causes large shear stress in the gasket.
• the friction between the rubber layer and the metal plate causes the rubber layer to peel off or wear out, as a result, the metal plate strength rubber layer will peel off!
• the NBR composition force proposed in the above-mentioned Patent Document 2 also has a large friction caused by the large friction caused by the large friction caused by the large friction caused by the resulting molded parts. .
• a method of reducing friction coefficient and reducing rubber wear by applying a grease coating agent such as polytetrafluoroethylene or polyethylene resin to the rubber surface is also practiced.
• a grease coating agent such as polytetrafluoroethylene or polyethylene resin
• a rubber-metal laminate that does not generate various trousses that are the target substances such as TRGS 552, PRTR, and further improves the high adhesion with the adhesive layer and the friction-resistant 'wear characteristics.
• the NBR composition to be used in the present invention 3 to 100 parts by weight of silica and 0.1 to 10 ⁇ m of average particle diameter per 100 parts by weight of toluene in addition to the above-mentioned essential components It is preferred that 60 to 200 parts by weight of minium be added!
• silica (reinforcing silica), halogen can be used! , Organic or organic! /, Pyrolysis of elemental compounds, Thermal reduction of borax, air oxidation of vaporized SiO, etc.
• Dry method silica manufactured by a method such as thermal decomposition of silica or sodium silicate It is possible to use amorphous silica, and commercially available products such as Nippon Silica Industrial Products Nips il LP can be used as it is. Further, a specific surface area of about 20 to 200 m 2 / g, preferably of about 30 to 100 m 2 / g are generally used. Silica is inferior in abrasion resistance to carbon black generally used due to its good price, handleability and abrasion resistance, but it is possible to improve the adhesion to the adhesive. .
• silicas are used in a proportion of about 3 to 100 parts by weight, preferably about 10 to 80 parts by weight, per 100 parts by weight of NBR. If the blending ratio is less than this range, the target adhesiveness can not be obtained, and the rubber peels off at the time of abrasion. On the other hand, if it is used in a proportion higher than this, the rubber hardness becomes very high and also the rubber elasticity is lost.
• the acid aluminum oxide of the component (E) one having an average particle diameter (measured by a laser diffraction method) of 1 to 10 ⁇ m, preferably 0.5 to 5 ⁇ m is used. If the average particle size is larger than this range, the acid / aluminum particles will cause the rubber layer to be worn away and the wear resistance to be lowered.
• Aluminum oxide is used in a proportion of about 60 to 200 parts by weight, preferably about 80 to 150 parts by weight, per 100 parts by weight of NBR. If the use ratio of aluminum oxide is less than this, the improvement effect of the abrasion resistance and compression resistance aimed by the present invention can not be obtained, while if it is used at a ratio larger than this, kneading processability and normal state are achieved. Physical properties become worse. However, within the specified range, the wear resistance is improved as the amount of aluminum oxide increases.
• silica and aluminum oxide having an average particle diameter of 0.1 to 10 ⁇ m By blending silica and aluminum oxide having an average particle diameter of 0.1 to 10 ⁇ m in this manner, mechanical strength (normal state physical properties) and the like of the case where only carbon black is blended in nitrile rubber are obtained. Improve the wear resistance while not losing most of these properties. It has an excellent effect of effectively reducing peeling due to rubber cracking after degradation due to heat or the like and deterioration of adhesion with an adhesive, which is observed when only carbon black is added.
• aluminum fluoride By adding aluminum fluoride, it is possible to improve the abrasion resistance without reducing the adhesion.
• the resulting vulcanized product is used as a rubber layer of a rubber-metal laminate in which an adhesive layer and a rubber layer are sequentially laminated on one side or both sides of a metal plate. It is possible to make it possible to achieve both the adhesion and the wear resistance of the rubber layer itself.
• the above NBR composition is not kneaded, or only a part of the raw materials are kneaded using an intermixer, a mixer such as an intermixer or a Banbury mixer, an open roll, etc., and then the NBR composition is boiled. It is prepared as a tolyl rubber coating agent by dissolving or dispersing it in a solvent at 250 ° C. or less, such as ketones, aromatic hydrocarbons or a mixed solvent of these.
• the strong-tolyl rubber coating agent is used to form a rubber layer of a rubber-metal laminate in which an adhesive layer and a rubber layer are sequentially laminated on one side or both sides of a metal plate.
• metal plate stainless steel plate, mild steel plate, zinc plated steel plate, SPCC steel plate, copper plate, magnesium plate, aluminum plate, aluminum die-cast plate, etc. are used. These are generally used in a degreased state, and the metal surface is roughened by shot blasting, scotch braid, hairline, dull finishing, etc., if necessary. In the case of the sealing material application, the thickness of about 0.1 to 1 mm is generally used.
• a primer layer is preferably formed on these metal plates.
• the primer layer is expected to significantly improve the heat resistance and water resistance of rubber-metal laminates to be adhered to rubber, and in particular, when a rubber-metal laminate is used as a sealing material, it should be formed. Is desirable.
• inorganic compounds such as metal compounds such as metal oxides, especially acid oxides of these metals, organic films such as silane, phenol resin, epoxy resin, polyurethane, etc.
• This hydrolytic condensation product may be used alone.
• organic metal compound ethyl acetate acetate diisopropiolate, aluminum tris (ethyl acetate acetate), aluminum-mono-acetyl acetate sulfonate-bis (ethyl acetate acetate), aluminum tris (acetyl acetate)
• Organoaluminum compounds such as acetate), isopropoxytitanium bis (acetylacetoacetate), 1,3-propanedioxytitanium bis (acetylacetoacetate), diisopropoxytitanium bis (acetylacetonate), titanium tetra
• Organic titanium compounds such as (acetyl acetate), and organic zirconium compounds such as di n-butoxydivinylbis (acetylacetonate), di n-butoxyzirconium bis (ethyl acetate), etc.
• R a lower alkyl group such as CH, CH, n-CH, i-CH, n-CH, i-CH
• n an integer from 1 to 4
• the organic titanium compound which is also composed of a chelate ring and an alkoxy group represented by Be
• metal oxide to be added to the primer layer in the same manner as silica alumina, titanium oxide, manganese oxide, zinc oxide, magnesium oxide, zirconium oxide, etc. may be used.
• the metal oxide is used in a ratio by weight of at most 0.9, preferably at most 0.45, based on the organometallic compound. If the amount of metal oxide is more than this range, mixing of the metal oxide in the primer component becomes difficult, which is not preferable.
• Examples of the amino group-containing alkoxysilane which forms a hydrolytic condensation product include 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, and N- (2-aminomethyl) -3-aminopropyl. Trimethoxysilane or the like is used.
• vinyl group-containing alkoxysilane vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (j8-methoxyethoxy) silane and the like are used.
• alkoxysilanes are prepared by mixing an amino group-containing alkoxysilane and water, adjusting the pH to the acid side, keeping the temperature at 40 to 60 ° C., and adding a vinyl group-containing alkoxysilane while stirring.
• a hydrolytic condensation product is formed by a polycondensation reaction.
• the vinyl group-containing alkoxysilane is mixed in an amount of 25 to 400 parts by weight, preferably 50 to 150 parts by weight, based on 100 parts by weight of the amino group-containing alkoxysilane.
• the obtained hydrolytic condensate is used in a ratio by weight of 3 or less, preferably 1.5 or less, with respect to the organic metal compound. If the amount of the hydrolytic condensation product is larger than this range, the compatibility with the adhesive will be poor, leading to a decrease in adhesion.
• the primer consisting of the above components has an organic solvent such as alcohols such as methanol, ethanol and isopropyl alcohol, acetone, methyl ethyl ketone and the like so that the solid content concentration is about 0.2 to 5% by weight.
• organic solvent such as alcohols such as methanol, ethanol and isopropyl alcohol, acetone, methyl ethyl ketone and the like so that the solid content concentration is about 0.2 to 5% by weight.
• organic solvent such as alcohols such as methanol, ethanol and isopropyl alcohol, acetone, methyl ethyl ketone and the like so that the solid content concentration is about 0.2 to 5% by weight.
• Such an organic solvent solution can be mixed with 20% by weight or less of water as long as the solution stability is maintained.
• the primer solution thus obtained is coated on a metal plate by spraying, dipping, brushing, using a roll coater, etc., at a coating weight of about 50 to 200 mg Zm 2 and dried at room temperature or hot air. Baking at about 100-250 ° C. for about 0.5-20 minutes to form a primer layer.
• Adhesives generally marketed as seed resin coatings can be used as they are, but preferably, an adhesive consisting of two types of phenolic resins of novolak type phenolic resin and resol type phenolic resin and unvulcanized NBR Agents can be used.
• novolak type phenolic resin phenol, p-cresol, m-cresol, p-tert-butylphenol and other phenolic hydroxyl groups are preferable.
• an acid catalyst such as oxalic acid, hydrochloric acid or maleic acid and phenols having two or three substitutable nuclear hydrogen atoms in the -position and / or P-position and mixtures thereof and formaldehyde
• formaldehyde A salt having a melting point of 80 to 150 ° C. obtained by condensation reaction, preferably having a melting point of 120 ° C. or more prepared from m-taresol and formaldehyde is used.
• the unvulcanized NBR commercially available products have a very high-tolyl content (more than 43% of tolyl content), a high 2 tolyl content (from 36 to 42% of the same), and a medium to high-tolyl content (with 31 to 35%). %, Medium-tolyl content (25 to 30%) and low-tolyl content (not more than 24%), various NBRs can be used as they are, but preferably the same as those used for rubber layer formation Is used.
• Adhesives containing these components may be used alone or in combination with organic solvents such as ketones such as methyl ethyl ketone and methyl isobutyl ketone, aromatic hydrocarbons such as toluene and xylene, etc. It is dissolved and used as a solution.
• organic solvents such as ketones such as methyl ethyl ketone and methyl isobutyl ketone, aromatic hydrocarbons such as toluene and xylene, etc. It is dissolved and used as a solution.
• the above components which form a preferred adhesive are 10 to 1000 parts by weight, preferably 60 to 400 parts by weight of resol-type phenolic resin and preferably 60 to 400 parts by weight and 100% by weight of novolac phenolic resin. It is used in a proportion of -3000 parts by weight, preferably 60-900 parts by weight.
• Each of these components is prepared as a vulcanizable adhesive by adding an organic solvent so that the total concentration of components is about 3 to 10% by weight, mixing and stirring.
• resol-type phenolic resin is used more than this, the adhesion of high-tolyl rubber material is reduced, while If the amount is less than this range, the adhesion to the metal surface may be reduced, which is not preferable.
• the formation of the adhesive layer on the metal plate is preferably carried out by applying the above-mentioned adhesive solution on the metal plate on which the primer layer is formed and air-drying it at room temperature, and then about 100 to 250 ° C. And drying for about 5 to 30 minutes.
• the adhesive layer may have not only a single layer structure but also a multi-layer structure.
• a phenolic adhesive layer containing an organometallic compound is formed on a primer layer, and a phenolic adhesive layer containing the above-described tolyl rubber composition is provided thereon, and an adhesive is applied in multiple layers. And those having a rubber layer formed thereon.
• the application process of the adhesive layer is increased, the adhesion between the primer layer and the rubber layer can be made stronger.
• the -tolyl rubber coating agent is applied onto the adhesive layer to a thickness of about 10 to 200 ⁇ m, and the curing is carried out at about 160 to 250 ° C. for about 0.5 to 30 minutes. It will be.
• a coating agent such as a resin-based or graphite-based may be coated on the rubber layer.
• Example 1 NBR (Nippon Zeon product 1041; nitrile content 41%) 100 parts by weight zinc oxide 15 "stearic acid 2"
• Tetrabenzilthiuram disulphide (the same ft® product Noccellar TBZTD) 1 "Each of the compounding ingredients above was kneaded with a mixer and an open roll, and the kneaded product was measured, and the curing rate was measured. The vulcanization rate is measured according to JIS K 6300-2 using a Toyo Seiki product rotorless rheometer, and the vulcanization rate is measured at 180 ° C. The difference between the minimum torque ML and the maximum torque MH from the vulcanization curve ME (MH-ML) was determined, and the 50% vulcanization time tc (50) of ME was used as an index.
• the kneaded material was subjected to press vulcanization at 180 ° C. for 6 minutes, 250 ⁇ 120 ⁇ 2 mm and 10 Test pieces of X 10 X 0.5 mm were prepared, and the hardness and the amount of N-nitrosamine were measured by the following method.
• N-Nitrosoamine content A test piece of 10 x 10 x 0.5 mm is stored in a closed container filled with nitrogen gas for 12 days, during which time it is regulated by the TRGS 552 released from the rubber sheet.
• Enylamine gas is adsorbed to the adsorbent and the amount is measured by gas chromatography [Fabrication of rubber-metal laminate]
• the formed vulcanized rubber layer is coated with a toluene resin dispersion of polyethylene resin to which a polybutadiene resin binder has been added for the purpose of preventing adhesion, and 230 ° C. , Heat treatment by air heating for 5 minutes There, to form an adhesion-preventing layer having a thickness of, to prepare a rubber-metal laminate.
• Compression test A convex state of stainless steel is compressed on the rubber surface of a rubber-metal laminate under the conditions of 120 ° C, 1 ton Zcm 2 for 5 minutes, and the state of the rubber is visually evaluated in the following 5 steps.
• Example 1 N-cyclohexyl-2-benzothiazolylsulfenamide was not used.
• Example 1 no di-2-benzothiazolyl disulfide was used.
• Example 1 3 parts by weight of tetrakis (2-ethylhexyl) thiuram disulfide (Ouchi emerging sciences product Noccellar TOT-N) is used instead of tetrabenzyl thiuram disulfide. It was used.
• Example 1 a further 3 parts by weight of zinc tetrabenzyldithiocarbamate (Ouchi New Yakuhin Co., Ltd., Noccellar ZTC) was used.
• Example 1 0.5 parts by weight of di-2-benzothiazolyldisulfide (Noxceler DM) as a vulcanization accelerator and tetramethylthiuram monosulfide (Ouchi emerging product Noxera 1 TS) 2.2 parts by weight were used.
• Noxceler DM di-2-benzothiazolyldisulfide
• tetramethylthiuram monosulfide Ouchi emerging product Noxera 1 TS
• Example 1 2.5 parts by weight of N-cyclohexyl-2-benzothiazolylsulfenamide (Noccella CZ) as a vulcanization accelerator and tetramethylthiuram disulfide (Ouchi emerging chemicals Noxella TT) Two parts by weight were used.
• Noccella CZ N-cyclohexyl-2-benzothiazolylsulfenamide
• Ouchi emerging chemicals Noxella TT tetramethylthiuram disulfide
• Example 1 0.5 parts by weight of di-2-benzothiazolyldisulfide (Noxceler DM) and 2 parts by weight of tetramethylthiuram disulfide (Noxceler®) were used as a vulcanization accelerator.
• Noxceler DM di-2-benzothiazolyldisulfide
• Noxceler® tetramethylthiuram disulfide
• NBR Joint silica product N235S; 36% of utrino content
• silica Nippon silica product nip seal LP
• aluminum oxide day ffi metal product A32: average particle size 1 ⁇ m
• 80 oxidized "5 a stearic acid 1.
• the kneaded product was subjected to press vulcanization at 170 ° C. for 20 minutes, and the hardness and the amount of trosoamine were measured in the same manner as in Example 1. Further, a disc-like sheet having a diameter of 120 mm and a thickness of 2 mm A test piece provided with a hole of 6.5 mm in diameter at the center was manufactured, and a Taber abrasion test was conducted by the following method.
• a rubber-metal laminate was prepared in the same manner as in Example 1, and subjected to abrasion and abrasion tests and compression tests by the following method.
• Friction 'Abrasion Test According to JIS K7125, P8147 corresponding to ASTM D1894, using Shin-Toshi Scientific Product Surface Property Tester, using 10 mm diameter hard chromium plated steel ball friction element as a mating material, moving speed Evaluate by reciprocating test under conditions of 400 mm / min, reciprocating movement width of 30 mm, temperature of room temperature, load of 2 kg, and measure the number of times that rubber wears and adhesive layer is exposed.
• Compression test 150 ° C, 3 tons Zcm 2 of a stainless steel convex body on the rubber surface of a rubber-metal laminate Evaluate the state of rubber when compressed under the condition of 5 minutes in 5 steps as in Example 1.
• Example 6 the amount of aluminum oxide was changed to 120 parts by weight, and the amount of FEF carbon black was changed to 40 parts by weight.
• Example 6 the amount of aluminum oxide was changed to 120 parts by weight, the amount of silica was changed to 60 parts by weight, and the amount of FEF carbon black was changed to 5 parts by weight.
• Example 6 N-cyclohexyl-2-benzothiazolylsulfenamide was not used.
• Example 6 no di-2-benzothiazolyl disulfide was used.
• Example 6 3 parts by weight of tetrakis (2-ethylhexyl) thiuram disulfide (Noccera TOT-N) was used in place of tetrabenzyl thiuram disulfide.
• Example 6 additionally, 3 parts by weight of zinc tetrabenzyldithiocarbamate (Noxceler ZTC) was used.
• Example 6 2 parts by weight of tetramethylthiuram disulfide (Noccella TT) was used instead of di-2-benzothiazolyl disulfide and tetrabenzylthiuram disulfide.
• Example 6 silica and aluminum oxide were not used, and the amount of FEF carbon black was changed to 120 parts by weight, and further, instead of di-2-benzothiazolyldisulfide and tetrabenzyldiuram disulfide. 2 parts by weight of tetramethylthiuram disulfide (Noxerer) was used. Comparative Example 8
• Example 6 tetrabenzyl thiuram disulfide was not used.
• Example 6 the amount of aluminum oxide was changed to 50 parts by weight and used.
• Example 7 the same amount of calcium carbonate was used instead of aluminum oxide.
• the rubber-metal laminate according to the present invention is suitably used as an engine head gasket or the like. Furthermore, in the case of using an NBR composition containing silica and oxidized aluminum having an average particle diameter of 0.1 to 10 m as a material for forming the rubber layer, for example, as a reciprocating sliding seal material for shock absorbers etc. It is preferably used.

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