# US 5,352,514 A · Metal surface adhered to a second metal surface

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- Number: US 5,352,514 A
- Document ID: US5352514A
- Status: Granted
- Kind: A
- Application number: 08/038,081
- Filed: 1993-03-29
- Granted: 1994-10-04
- Earliest claimed: 1990-04-25
- Assignees: Nitta Gelatin Inc.
- Inventors: Seiki Ueno; Masaaki Nakamura
- Web page: https://patentgrep.com/patent/US5352514A

## CPC

- C09J 163/00: Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
- C08K 3/26: Carbonates; Bicarbonates
- C08K 3/32: Phosphorus-containing compounds
- C09J 201/00: Adhesives based on unspecified macromolecular compounds
- C08L 2666/02: Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L 2666/54: Inorganic substances
- Y10T 428/25: Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T 428/258: Alkali metal or alkaline earth metal or compound thereof
- Y10T 428/31522: Next to metal
- Y10T 428/31605: Next to free metal
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A favorable adhesive strength can be obtained without requiring pretreatment of metal surfaces in adhering. The invention relates to an adhesive composition having a biological calcium compound added as an adhesion improver. The biological calcium compound is at least one type selected from a group comprising, for example, hydroxyapatite, seashells and egg shells.

## Claims

### Claim 1

An article comprising a first metal surface selected from the group consisting of an aluminum surface and an aluminum alloy surface, and a second metal surface wherein an adhesive composition comprising
(a) a synthetic resin adhesive matrix which has adhesive properties, selected from the group consisting of an isocyanate compound possessing two or more isocyanate groups, and an epoxy resin; and
(b) a biological calcium compound having a mean particle size of 10 .mu.m or less which is selected from the group consisting of hydroxyapatite, crushed sea shells and crushed egg shells,
adheres said surfaces together.

### Claim 2 (depends on 1)

The article according to claim 1, wherein said first metal surface is untreated.

### Claim 3 (depends on 1)

The article according to claim 1, wherein said second metal surface is untreated.

### Claim 4 (depends on 1)

The article according to claim 1, wherein said first and second metal surfaces are untreated.

### Claim 5 (depends on 1)

The article according to claim 1, wherein said second metal surface is selected from the group consisting of an aluminum surface and an aluminum alloy surface.

### Claim 6 (depends on 1)

The article according to claim 1, wherein said biological calcium compound is hydroxyapatite.