# US 11,993,056 B2 · Metal-plastic composite material and method for manufacturing same

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- Number: US 11,993,056 B2
- Document ID: US11993056B2
- Status: Granted
- Kind: B2
- Application number: 17/782,958
- Filed: 2020-12-09
- Published: 2023-01-19
- Granted: 2024-05-28
- Earliest claimed: 2019-12-11
- Assignees: Posco
- Applicants: Posco
- Inventors: Hye-Jin Yoo; Chang-Se Byeon; Jung-Su Kim; Je-Hoon Baek; Hwi-Geon Kim
- Web page: https://patentgrep.com/patent/US11993056B2

## CPC

- B32B 15/08: of synthetic resin
- B29C 65/4835: {Heat curing adhesives}
- B29C 65/64: Joining a non-plastics element to a plastics element, e.g. by force (B29C65/44 takes precedence)
- B29C 66/45: {Joining of substantially the whole surface of the articles (methods or apparatus for laminating B32B37/00)}
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B32B 7/10: at least one layer having inter-reactive properties
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 9/041: {of metal}
- B32B 15/085: comprising polyolefins
- B32B 15/088: comprising polyamides
- B32B 15/09: comprising polyesters
- B32B 15/095: comprising polyurethanes
- B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B32B 27/40: comprising polyurethanes
- C08K 5/5415: containing at least one Si—O bond
- C08K 5/544: containing nitrogen
- C09J 5/06: involving heating of the applied adhesive
- B32B 2250/03: 3 layers
- B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
- B32B 2255/06: on metal layer
- B32B 2255/26: Polymeric coating
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2307/732: Dimensional properties
- B32B 2307/748: Releasability
- B32B 2309/02: Temperature
- B32B 2309/12: Pressure
- B32B 2311/30: Iron, e.g. steel
- B32B 2605/08: Cars
- C09J 2400/163: in the substrate
- C09J 2400/226: in the substrate
- C09J 2483/00: Presence of polysiloxane
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- 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)

## Abstract

The present invention provides a metal-plastic composite material having excellent adhesive strength and formability and a method for manufacturing the same, and specifically, the present invention provides a metal-plastic composite material and a method for manufacturing the same comprising: a metal layer; and a plastic layer on at least one surface of the metal layer, wherein a thin film layer formed of a silane coupling agent is provided between the metal layer and the plastic layer, and the metal layer and the plastic layer are bonded by covalent bonding with the silane coupling agent.

## Claims

### Claim 1

A metal-plastic composite material, comprising:
a metal layer;
a plastic layer on at least one surface of the metal layer; and
a thin film layer provided between the metal layer and the plastic layer,
wherein the thin film layer includes (i) a silane coupling agent at an amount of 95 to 99 weight %, and (ii) a phenoxy-based resin at an amount of 1 to 5 weight % based on a total weight of the thin film layer,
wherein the silane coupling agent is at least one selected from a group consisting of 6-[[3-(triethoxysilyl)propyl]amino]-1,3,5-triazine-2,4-dithiol monosodium (TES) and tetramethoxy silane,
wherein the metal layer and the plastic layer are bonded to each other by a covalent bond with the silane coupling agent.

### Claim 2 (depends on 1)

The metal-plastic composite material of claim 1, wherein a material of the metal layer is an electric galvanized steel sheet or a hot-dip galvanized steel sheet.

### Claim 3 (depends on 1)

The metal-plastic composite material of claim 1, wherein the plastic layer includes one or more polymers selected from a group consisting of polyamide, polyacetal, polycarbonate, polyphenylene oxide, polyethylene, polypropylene, polyester and polyurethane.

### Claim 4 (depends on 1)

The metal-plastic composite material of claim 1, wherein a ratio of a thickness between the plastic layer and the metal layer is 3:1 to 1:5.

### Claim 5 (depends on 1)

The metal-plastic composite material of claim 1, wherein the thin film layer has a thickness of 1 nm or more to less than 1000 nm.

### Claim 6 (depends on 1)

The metal-plastic composite material of claim 1, wherein the covalent bond is a carbon-carbon bond, a siloxane bond, an amide bond, an ester bond, or an ether bond.

### Claim 7 (depends on 1)

The metal-plastic composite material of claim 1, wherein the metal-plastic composite material has a metal layer formed on both surfaces of the plastic layer.

### Claim 8 (depends on 1)

A method of manufacturing the metal-plastic composite material of claim 1, the method comprising:
forming the thin film layer on one surface or both surfaces of the metal layer; laminating the plastic layer on the thin film layer; and
bonding the metal-plastic laminated material by applying heat and pressure thereto.

### Claim 9 (depends on 8)

The method of claim 8, wherein the silane coupling agent and the metal layer and the silane coupling agent and the plastic layer form a covalent bond by the bonding the metal-plastic laminated material by applying heat and pressure thereto.

### Claim 10 (depends on 9)

The method of claim 9, wherein the covalent bond is a carbon-carbon bond, a siloxane bond, an amide bond, an ester bond, or an ether bond.

### Claim 11 (depends on 8)

The method of claim 8, wherein the bonding step is performed at a temperature of 80 to 280° C.

### Claim 12 (depends on 8)

The method of claim 8, wherein thin film layer has a thickness of 1 nm or more to less than 1000 nm.