Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method of metal resin complex and metal resin complex prepared thereby

A metal resin and composite technology, applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve problems such as unfavorable safety production, discoloration and toxicity of aluminum alloy surface

Active Publication Date: 2013-12-18
BYD CO LTD
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing integrated molding technology of aluminum alloy and resin composition is disclosed, using amine substances, such as: carbamate, hydrazine monohydrate, ethylenediamine and other aqueous solutions to treat the surface of aluminum alloy to obtain nano-scale microstructures. holes, corrode nano-scale holes, and retain the amine groups in the nano-holes of the aluminum alloy, and finally inject the resin and the aluminum alloy through the reaction of the amine groups and the injection molding material, so as to obtain a certain tensile strength. The aluminum-plastic integrated product with high tensile and shear strength, but using this kind of amine corrosion technology, the holes formed on the surface of the aluminum alloy are too small, and it is difficult for the resin to be directly injected into the nano-scale holes, which reduces the bonding strength between the aluminum alloy and the resin , that is, the tensile performance is poor. At the same time, the combination of resin and aluminum alloy mainly relies on amine groups, and the types of resins used are very limited. At present, the resins that can be used in this technology are only PPS (polyphenylene sulfide), PA (poly Amide), PPA (polyphthalamide resin), PBT (polybutylene terephthalate) and other four types of resins, the practical application range is also narrow, and the amines used are toxic and volatile Substances that are not conducive to safe production and poor environmental performance
[0005] There is also an acid etching solution containing inorganic halogen compounds directly corroded on the surface of aluminum alloy, and then injection molded to obtain an aluminum-plastic integrated product. However, the technology of using this type of etching solution to corrode the surface of aluminum alloy has low concentration of the etching solution for a long time, and the concentration of the etching solution High reaction heat release is large, the temperature is not easy to control, and the corrosion will be more severe as the temperature rises, forming a vicious circle, which is easy to cause rapid volatilization of the corrosive liquid, splashing of the corrosive liquid and serious discoloration of the aluminum alloy surface during violent reactions, etc. It is not conducive to large-scale production, and with this method, the bonding force between metal and resin is poor
[0006] There is also an aluminum oxide film layer with holes with a diameter of 0.05-0.08 microns prepared by anodizing on the surface of the aluminum alloy, and then combined with a resin to obtain an aluminum-plastic integrated product, but the holes formed on the surface of the aluminum alloy obtained by this method are too small and It is difficult for the resin to be directly injected into the nano-scale holes, which reduces the bonding strength between the aluminum alloy and the resin, that is, the tensile properties are poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of metal resin complex and metal resin complex prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The invention provides a method for preparing a metal-resin composite, comprising the following steps:

[0017] S1, anodic oxidation: anodize the pretreated metal substrate to obtain a metal substrate with an anodized film layer on the surface, and the metal substrate is an aluminum alloy substrate or an aluminum substrate; anodization is required by those skilled in the art Known anodic oxidation technology, the present invention preferably can include putting the pretreated metal substrate as an anode into a sulfuric acid or phosphoric acid solution with a concentration of 10wt%-30wt%, electrolyzing 2- 15 minutes to obtain a metal substrate with a 1-20um thick anodized film layer on the surface. The anodized equipment adopts known anodized equipment, such as an anodized tank. Preferably, the thickness of the anodized film layer prepared by anodic oxidation is 1-10um.

[0018] S2, phosphoric acid treatment: immerse the metal substrate containing the anodized film laye...

Embodiment 1

[0043] This example prepares an aluminum alloy resin composite body;

[0044] 1. Pretreatment: Cut the commercially available 1mm thick 6063 aluminum alloy plate into 15mm*80mm rectangular pieces, put it into a polishing machine for grinding, then degrease and clean it, and then oxidize it at 60°C Alkaline etching treatment in a solution with a sodium content of 40g / L for 10s, rinse with water and put in HNO 3 Neutralize in a neutralization tank with a content of about 6wt% for 30s, and then wash with water to obtain a pretreated aluminum alloy sheet;

[0045] 2. Surface treatment 1: Put the above aluminum alloy sheet as an anode into H with a concentration of about 15wt%. 2 SO 4 In the anodizing tank, electrolyze at 15V for 5 minutes at 18°C, and bake at 80°C for 20 minutes;

[0046] 3. Surface treatment 2: prepare 10wt% H in a beaker 3 PO 4500ml of aqueous solution, at room temperature, immerse 10PCS of the above-mentioned aluminum alloy sheet in it, take it out after 2...

Embodiment 2

[0051] Aluminum alloy resin composites A2 and B2 were prepared in the same manner as in Example 1, except that surface treatment 2 was prepared in a beaker containing 10wt% H 3 PO 4 500ml of aqueous solution, at room temperature, immerse 10PCS of the above-mentioned aluminum alloy sheet in it, take it out after 10 minutes, put it in a beaker filled with water and soak it for 2 minutes, then put the aluminum alloy in an oven at 80°C for drying. Using the same method as in Example 1, it was measured that a 5-6um thick loose layer, a 75-100nm thick barrier layer and a 25nm-50um thick corrosion layer were obtained on the surface of the aluminum alloy sheet after electrolysis. The pore diameter of the micropores of the anodized film in the loose layer is 30nm-45um; the pore diameter of the barrier layer corrosion holes in the barrier layer is 30nm-50um; the pore diameter of the aluminum alloy corrosion holes in the corrosion layer is 60nm-200um. It can also be observed that there ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a metal resin complex and the metal resin complex prepared thereby. The preparation method of the metal resin complex comprises the following steps: S1, anodic oxidation: a metal substrate with a surface comprising an anodic oxidation film layer is obtained by anodic oxidation of a pretreated metal substrate, and the metal substrate is an aluminum alloy substrate or aluminum substrate; S2, treatment with phosphoric acid: the metal substrate containing the anodic oxidation film layer and obtained by the step S1 is immersed in a phosphoric acid solution for treatment to obtain a surface treated metal substrate; and S3, injection: the surface of the surface treated metal substrate is injected with a resin composition, and then the metal resin complex is obtained after molding. In the metal resin complex, the binding force between metal and resin is strong, and the process is simple, is easy for large-scale production, and has no pollution.

Description

technical field [0001] The invention relates to a method for preparing a metal-resin composite and the prepared metal-resin composite. Background technique [0002] In the field of parts manufacturing of automobiles, household electrical appliances, industrial machines, etc., the integrated molding technology of metal and resin is required. At present, the industry uses adhesives to integrate metal and synthetic resin at room temperature or under heating. Although the above method can be used to prepare a composite body formed of metal and plastic, the bonding force between the metal and plastic of the composite obtained according to these methods is poor, and the adhesive has poor acid and alkali resistance, and the composite body cannot be subsequently anodized. And other surface treatment. Therefore, people have been studying whether there is a more reasonable way to integrate high-strength engineering resins with alloys such as aluminum alloys. [0003] Those skilled i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C25D11/24B29C45/14
Inventor 程云章晓郭强陈梁
Owner BYD CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products