Rubber-metal laminate

• US 8,309,215 B2
• Filed: 03/27/2008
• Issued: 11/13/2012
• Est. Priority Date: 03/27/2007
• Status: Active Grant

• Current Assignee: NOK Corporation
• Original Assignee: NOK Corporation
• Inventors: Yokota, Atsushi, Higashira, Toshihiro
• Primary Examiner(s): Tran, Thao T.
• Application Number:
  US12/593,501
• Publication Number:
  US 20100086769A1
• Time in Patent Office: 1,692 Days
• Field of Search: 428/457, 428/500, 428/327
• US Class Current: 428/327
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 2255/06 on metal layer
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2264/10 Inorganic particles
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/554 Wear resistance
• CPC Class Codes: B32B 2307/712 Weather resistant
• CPC Class Codes: B32B 2307/714 Inert, i.e. inert to chemical degradation, corrosion
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 2581/00 Seals; Sealing equipment; Gaskets
• CPC Class Codes: B32B 27/42 comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/31678 Of metal
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

A hydrogenated nitrile rubber-metal laminate having distinguished heat and rubber bulging resistances at elevated temperatures and surface pressures, which comprises a metallic sheet subjected to a hexavalent Cr ions-free chemical conversion treatment, a defatting treatment, a surface-roughening treatment, a primer treatment, or a combination of the treatment, and an adhesive layer and a rubber layer successively laid on one or both surfaces of the metallic sheet, wherein the rubber layer is a vulcanizate of a hydrogenated nitrile rubber compound comprising 100 parts by weight of a hydrogenated nitrile rubber, 50-250 parts by weight of an inorganic filler containing not more than 20% by volume, on the basis of total compound, of a non-reinforcing inorganic filler having an average particle size of not more than 5 μm, 4-20 parts by weight of an organic peroxide, and preferably furthermore 2-10 parts by weight of N,N′-phenylene dimaleimide.

Claims

1. A hydrogenated nitrile rubber-metal laminate, which comprises a metallic sheet having opposite surfaces which metallic sheet has been subjected to a hexavalent ions-free chemical conversion treatment, a defatting treatment, a surface-roughening treatment, a primer treatment, or a combination of the recited treatments, and an adhesion layer and a rubber layer successively laid on one or both of the opposite surfaces of the metallic sheet, the rubber layer being a vulcanizate of a hydrogenated nitrile rubber compound comprising 100 parts by weight of a hydrogenated nitrile rubber having an iodine value of 10-15, 50-250 parts by weight of an inorganic filler containing 5-20% by volume, on the basis of total hydrogenated nitrile rubber compound, of calcium carbonate as a non-reinforcing inorganic filler having an average particle size of 0.01-2 μ

m, 2-10 parts by weight of N, N′

-m-phenylene dimaleimide and 4-20 parts by weight of an organic peroxide.

2. A hydrogenated nitrile rubber-metal laminate according to claim 1, wherein the hydrogenated nitrile rubber having an iodine value of 10-15 comprises a blend of hydrogenated nitrile rubbers having different iodine values.

3. A hydrogenated nitrile rubber-metal laminate according to claim 1;

wherein said laminate is a sealing member.

4. A hydrogenated nitrile rubber-metal laminate according to claim 3;

wherein said laminate is an engine gasket material.

5. A hydrogenated nitrile rubber-metal laminate according to claim 1;

wherein said laminate is a sealing material.