Layered rubber/metal product

A technology of rubber metal and laminated body, which is applied in the direction of metal layered products, adhesives, layered products, etc. It can solve the problems of adhesive layer peeling, rubber instantaneous wear, poor water resistance, LLC resistance, etc., and achieve adhesion Less decrease in strength, excellent wear characteristics, anti-peeling effect

Inactive Publication Date: 2014-11-26
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Here, it is difficult to prevent abrasion or peeling of the rubber used in the rubber-metal laminate by increasing the proportion of carbon black, which is generally used to improve the friction and abrasion resistance of rubber
In addition, the method of coating PTFE or polyethylene resin solution on the rubber surface to reduce the friction coefficient and reduce the wear of rubber has also been adopted. However, when the coating film formed by these solutions is peeled off or worn, the rubber may appear instantaneous wear. situation, the problem is to improve the friction and wear characteristics of the rubber itself
[0004] Moreover, if the adhesion is poor, even if the rubber is not worn during friction and abrasion, the peeling of the rubber cannot be avoided; For the wear resistance of rubber in rubber-metal laminates, it is necessary to improve the wear resistance of the rubber itself, and also to improve the adhesion to the metal
[0005] In order to form a rubber-metal composite that needs to be resistant to water or LLC (Long-Life Coolant), stainless steel is often used for the metal, but a stainless steel-rubber composite that is vulcanized and bonded to the rubber by directly applying a vulcanized adhesive to the stainless steel The water resistance and LLC resistance are poor, and the immersion test is performed on them, and the adhesive layer will peel off
[0006] As a measure to solve the above problems, various proposals have been made to improve liquid resistance by using a silane-based primer as a primer and a phenolic resin-based topcoat as an adhesive on a metal plate. , but such methods cannot obtain the same level of adhesion as the coating-type chromate-treated stainless steel containing hexavalent chromium ions, which is not preferable for environmental measures. In recent years, there has been a problem of rubber peeling in engines and antifreeze.

Method used

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  • Layered rubber/metal product

Examples

Experimental program
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Effect test

preparation example Construction

[0044] The preparation of the adhesive is carried out as follows: the NBR composite compounded with various ingredients in NBR is left for about 0 to 15 days after preparation, and after cutting, it is dissolved in, for example, methyl ethyl ketone-toluene (weight ratio 1:9) In the mixed solvent, a rubber paste having a solid content (NBR composite) concentration of about 10 to 30% by weight is prepared, and then an organic solvent such as a phenolic resin-based binder solution and methyl ethyl ketone is added thereto. Relative to the NBR in the rubber paste, the ratio of the phenolic resin in the phenolic resin-based adhesive solution is used in the above ratio, and the solid content concentration in the adhesive (the concentration of the solid content composed of the NBR composite and the phenolic resin) is About 2 to 15% by weight, preferably about 3 to 10% by weight.

[0045] The diluted concentration of the binder solution is appropriately selected according to the coatin...

Embodiment 1

[0055] (1) NBR (JSR product N235S; CN content 36%): 100 parts by weight

[0056] SRF carbon black (I 2 Adsorption capacity 29g / kg, DBP oil absorption capacity 72ml / 100g): 60 parts by weight

[0057] White carbon (Nipsil LP from Japan Silica products; specific surface area 200m 2 / g, particle size 0.02μm): 40 parts by weight

[0058] Zinc oxide: 5 parts by weight

[0059] Stearic acid: 2 parts by weight

[0060] Antiaging agent (Ouchi Shinko Chemicals, Nocrac 224): 2 parts by weight

[0061] Triallyl isocyanurate (Nippon Kasei, TAIC): 1.2 parts by weight

[0062] 1,3-bis(tert-butylperoxyisopropyl)benzene (Sanjian Chemical Products, Sunperox TY-13): 6 parts by weight

[0063] Vinyl tris(2-methoxyethoxy)silane (product of Momentive Performance Materials, A-172): 3 parts by weight

[0064] (total) 219.2 parts by weight

[0065] For the above ingredients, after kneading the polymer with a kneader, first add carbon black, zinc oxide, stearic acid and anti-aging agent for mix...

Embodiment 2

[0093] In Example 1(1), an equal amount of vinyltris(isopropoxy)silane (manufactured by Toray Dow Corning, Z-6550) was used as a silane-based coupling agent.

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Abstract

Disclosed is a rubber metal laminate comprising NBR and metal that are bonded to each other through an adhesive comprising novolak-type and resol-type phenol resins, NBR, white carbon, and a vinyltrialkoxysilane coupling agent having an alkoxyl group containing two or more carbon atoms. As the adhesive, a mixed solution of a phenol resin-based adhesive solution and a rubber paste that is an organic solvent solution of an NBR compound comprising NBR, white carbon, and a silane coupling agent is specifically used. The rubber metal laminate has excellent friction and wear resistance characteristics at high temperatures and less decrease in adhesive strength after immersion in water or an antifreeze solution, and is capable of effectively preventing peeling, etc., caused thereby.

Description

technical field [0001] The present invention relates to a rubber-metal laminate. More specifically, it relates to a rubber-metal laminate that is a laminate of NBR and metal. Background technique [0002] In parts where the temperature changes greatly, such as the engine gasket part, damage (abrasion) occurs between the joint surface of the engine and the gasket due to the temperature change. In rubber-metal laminates used as gaskets, for example, large shear stress occurs due to such damage, and the rubber peels or wears due to friction between the rubber and the metal, resulting in the problem that the rubber layer is peeled off from the metal. . [0003] Here, it is difficult to prevent wear or peeling of the rubber used in the rubber-metal laminate by increasing the proportion of carbon black, which is generally used to improve the friction and wear resistance of rubber. In addition, the method of coating PTFE or polyethylene resin solution on the rubber surface to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/06C09J11/04C09J109/02C09J161/06C09J183/07
CPCC08J2307/00C08J2483/14C08K5/548C08J5/128C09J109/02C08J2461/06B32B15/06C09J183/14C09J161/06C08K3/36C08L9/02
Inventor 东良敏弘
Owner NOK CORP
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