Process for producing a metal-plastic hybrid component

Patent metadata

Field	Value
Publication number	US-10603872-B2
Application number	US-201414764348-A
Country	US
Kind code	B2
Filing date	Jan 29, 2014
Priority date	Jan 29, 2013
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

The invention provides a process for producing a hybrid component comprising metal and plastic. The process comprises the steps of a) pretreating the metal surface by applying at least one conversion layer, b) applying at least one layer of an adhesion promoter composition and c) bonding the metal to the plastic. The adhesion promoter composition comprises at least one copolyamide-based hotmelt adhesive.

First claim

The invention claimed is:

1. A process for producing a hybrid component comprising metal and plastic, the process comprising:
pretreating a metal surface by applying at least one conversion layer;
applying at least one layer of an adhesion promoter composition; and
bonding the metal to the plastic,
wherein the adhesion promoter composition comprises at least one copolyamide-based hotmelt adhesive and does not comprise a functionalized polyolefin, and
the hybrid component has a bond strength in a range of from 6.2 to 16.0 MPa.

2. The process of claim 1 , wherein the copolyamide-based hotmelt adhesive comprises a copolyamide, at least one epoxy component, and at least one blocked polyisocyanate.

3. The process of claim 1 , wherein the plastic has been reinforced.

4. The process of claim 3 , wherein the plastic has been reinforced by fibers.

5. The process of claim 1 , wherein a converting agent is used to produce the conversion layer.

6. The process of claim 5 , wherein the converting agent comprises halides.

7. The process of claim 6 , wherein the converting agent comprises fluorides.

8. The process of claim 5 , wherein the converting agent comprises halide salts, complex halides or mixtures thereof.

9. The process of claim 1 , wherein in the bonding, the plastic is applied to the coated metal by injection moulding, pressing, laminating, in-mould coating or (co)extrusion.

10. The process of claim 1 , wherein the conversion layer is obtained by a process comprising treating the metal surface with a plasma jet produced by using an operating gas and/or a flame jet produced by using a combustion gas, wherein at least one precursor material is introduced into the operating gas and/or the plasma jet or into the combustion gas and/or the flame jet such that the precursor material is reacted in the plasma jet or flame jet to form a reaction product and that the reaction product is deposited on the metal surface and/or on at least one layer disposed on the metal surface to coat the metal surface and/or the at least one layer.

11. The process of claim 1 , wherein the metal comprises an iron-containing alloy.

12. The process of claim 1 , wherein the metal comprises steel.

13. The process of claim 1 , wherein the plastic comprises at least one selected from the group consisting of a polybutylene terephthalate, a polyolefin, a polycarbonate, a polyurethane, an aliphatic or semiaromatic polyamide, acrylonitrile-butadiene-styrene, and polymethylmethacrylate.

14. The process of claim 1 , wherein the at least one copolyamide-based hotmelt adhesive in the adhesion promoter composition comprises a copolyamide, an epoxy component, and a blocked polyisocyanate.

Assignees

• Gruhn Maximilian
• Kuhmann Karl
• Risthaus Martin
• Evonik Operations Gmbh

Inventors

• Gruhn Maximilian
• Kuhmann Karl
• Risthaus Martin

Classifications

• B29C45/1671

  with an insert · CPC title

• B32B21/08

  of synthetic resin · CPC title

• B32B27/06

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title

• C08G18/798

  containing urethdione groups · CPC title

• B32B2451/00

  Decorative or ornamental articles · CPC title