Base processing agent for metal material and method for processing base for metal material

Abstract

Disclosed is a low-cost base processing agent for metal materials, which enables to improve adhesion, particularly adhesion at high temperatures between a metal material and a resin such as a prepreg without roughening the metal material surface. This base processing agent for metal materials does not use a substance such as hexavalent chromium which can be a cause for environmental contamination, and places little burden on the environment. Also disclosed is an environmentally advantageous method for processing a base for a metal material, which uses such a base processing agent and has excellent productivity. Further disclosed are a metal material having a base-processed coating film which is obtained by the base processing method, and a laminated member. Specifically disclosed is a base processing agent for metal materials, which contains at least one compound (A) and at least one elastomer (B). The at least one compound (A) is selected from the group consisting of compounds (A-1) having one or more benzene nuclei and two or more functional groups selected from the group consisting of a hydroxy group, a carboxy group and an amino group and directly bonded to a carbon atom of the benzene nucleus, and thiourea derivatives (A-2).

Description

technical field [0001] The present invention relates to a metal material surface treatment agent for forming a surface treatment film on the surface of a metal material, a metal material surface treatment method using the metal material surface treatment agent, a metal material with a surface treatment film, and a laminated part. Background technique [0002] Various metal materials are used in industrial products, and in addition to corrosion resistance and adhesion, various surface treatments are carried out to impart functions such as heat resistance, hydrophilicity, and sliding properties. [0003] Conventionally, in order to improve the adhesiveness between a metal material and a resin, a method of mechanically roughening the surface of a metal base material by sandblasting or the like to form a so-called anchor recess (anchor) has conventionally been employed. [0004] However, the above-mentioned mechanical processing is generally poor in productivity and tends to be ...

AI Technical Summary

Problems solved by technology

[0020] To sum up the problems of these prior art, firstly, in the conventional etching method or chemical treatment method, during the processing step, during the necessary cleaning step of the metal material surface after etching or chemical treatment, a large amount of non-recyclable waste is generated. Liquid, so the environmental pressure is high, it is not preferred from the perspective of environmental protection

In addition, with the increase in the number of steps such as cleaning steps, the preparation process becomes complicated and the productivity decreases

Especially in the chemical treatment method, a certain degree of reaction time is required, so the steps themselves take time, further resulting in a decrease in productivity

In addition, it is necessary to increase the size of the device, which is not preferable in terms of cost.

[0021] Other problems include: as mentioned above, the surface of the metal material after the surface treatment is rough, and when making a circuit, the transmission loss when high-frequency current flows is increased, or as described in Patent Document 4, it is difficult to form a microcircuit

In addition, when used in printed circuit boards, etc., if the surface of the metal substrate is cracked, in order to reduce its roughness, it is necessary to thicken the laminated prepreg, which is not economical.

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