# US 11,079,019 B2 · Material for gasket

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- Number: US 11,079,019 B2
- Document ID: US11079019B2
- Status: Granted
- Kind: B2
- Application number: 15/532,196
- Filed: 2015-12-01
- Published: 2017-11-23
- Granted: 2021-08-03
- Earliest claimed: 2014-12-01
- Assignees: Nichias Corporation
- Applicants: Nichias Corporation
- Inventors: Hideharu Aoyagi
- Web page: https://patentgrep.com/patent/US11079019B2

## CPC

- F16J 15/0818: {Flat gaskets}
- C09K 3/10: {Materials in mouldable or extrudable form} for sealing or packing joints or covers (filling pastes C09D5/34)
- C09K 3/1009: {Fluorinated polymers, e.g. PTFE}
- F02F 11/00: Arrangements of sealings in combustion engines {(piston rings or ring sealings of similar construction F16J9/00)}
- F16J 15/08: with exclusively metal packing
- F16J 15/0806: {characterised by material or surface treatment}
- F16J 2015/0856: {with a non-metallic coating or strip}
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES

## Abstract

A gasket material to be mounted in a vehicle engine, wherein, on one or both sides of a steel plate, a rubber layer is formed via a coating film including a reaction product of an acid component and a metal or a reaction product of an acid component and a metal compound, and at least one selected from zirconia, alumina and titania.

## Claims

### Claim 1

A gasket material to be mounted in a vehicle engine, comprising a steel plate and, on one or both sides of the steel plate, a rubber layer via a coating film consisting essentially of a reaction product of an acid component and a metal or a reaction product of an acid component and a metal compound, and alumina; wherein
the metal or a metal in the metal compound is neither Ti (titanium), Zr (zirconium) nor Zn (zinc).

### Claim 2 (depends on 1)

The gasket material according to claim 1, wherein the acid component is at least one selected from phosphoric acid, orthophosphoric acid, fused phosphoric acid, phosphoric anhydride, acetic acid, formic acid, sulfuric acid, nitric acid, hydrofluoric acid, a fluoro complex and an organic acid.

### Claim 3 (depends on 1)

The gasket material according to claim 1, wherein the acid component is a mixture obtained by combining two or more different kinds selected from phosphoric acid, orthophosphoric acid, fused phosphoric acid, phosphoric anhydride, acetic acid, formic acid, sulfuric acid, nitric acid, hydrofluoric acid, a fluoro complex and an organic acid.

### Claim 4 (depends on 1)

The gasket material according to claim 1, wherein the metal or a metal in the metal compound is at least one selected from Fe (iron), Ni (nickel), Al (aluminum), Mg (magnesium), Mn (manganese), Ca (calcium), W (tungsten), Ce (cerium), V (vanadium), Mo (molybdenum), Li (lithium) and Co (cobalt).

### Claim 5 (depends on 1)

The gasket material according to claim 1, wherein the blending amount of the metal or metal compound in the coating film is 30 to 90 wt % wherein in the case of a metal compound, the blending amount is a value obtained by converting to an amount of the metal element.

### Claim 6

A gasket material to be mounted in a vehicle engine, comprising
a steel plate, and on one or both sides of the steel plate,
a coating film consisting essentially of a reaction product of an acid component and a metal or a reaction product of an acid component and a metal compound, and alumina; a primer layer that does not contain polybutadiene, hydrogenated polybutadiene and modified polybutadiene; and a rubber layer in this order; wherein
the metal or a metal in the metal compound is neither Ti (titanium), Zr (zirconium) nor Zn (zinc).

### Claim 7 (depends on 6)

The gasket material according to claim 6, wherein the blending amount of the metal or metal compound in the coating film is 30 to 90 wt % wherein in the case of a metal compound, the blending amount is a value obtained by converting to an amount of the metal element.