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Decoating liquid

A deplating solution and content technology, applied in the field of deplating solution, can solve the problems of plant and equipment corrosion, plastic material corrosion, human injury, etc., and achieve the effect of protecting human health, avoiding corrosion and reducing harm

Inactive Publication Date: 2009-07-08
MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, often adopt the sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) of the stripping solution for deplating, the above-mentioned stripping solution is likely to have an adverse effect on the plastic material itself due to the presence of strong oxidant nitric acid during deplating. In addition, it is also due to the existence of strong oxidant nitric acid. Metal reaction, nitric acid is not only a strong oxidant, but also acts as an acid, especially under heating conditions, nitric acid is reduced, resulting in a large amount of NO 2 Yellow smoke pollutes the air, causes harm to the human body, and is also seriously corrosive to the plant and equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A kind of deplating solution, it comprises sulfuric acid and oxidizing agent, and oxidizing agent is hydrogen peroxide, and the content of sulfuric acid is 98% sulfuric acid 180g / L; The content of hydrogen peroxide is 27.5% hydrogen peroxide 30g / L.

[0010] The content of the above-mentioned sulfuric acid can also be 50g / L, 150g / L, 200g / L or 500g / L of 98% sulfuric acid; the content of hydrogen peroxide can also be 10g / L, 25g / L, 35g / L or 100g / L of 27.5% hydrogen peroxide .

[0011] In the above stripping solution, the oxidizing agent is also any one and a combination of two or three of potassium permanganate, potassium dichromate and chromium trioxide, and the content of potassium permanganate can be 10g / L, 20g / L, 25g / L, 30g / L or 50g / L; the content of potassium dichromate can be 10g / L, 80g / L, 100g / L, 120g / L or 200g / L; the content of chromium trioxide can be 50g / L, 130g / L, 165g / L, 200g / L or 300g / L.

Embodiment 2

[0013] A kind of deplating solution, compared with embodiment one, it can also include the anti-staining salt that can remove copper layer and nickel and have no corrosion to plastic surface, and anti-staining salt is m-nitrobenzene sodium sulfonate, m-nitrobenzene The content of sodium benzenesulfonate is 50g / L.

[0014] The content of sodium m-nitrobenzenesulfonate can also be 30g / L, 80g / L or 150g / L.

Embodiment 3

[0016] A kind of deplating solution, compared with embodiment two, it also comprises the accelerator that is used to accelerate copper layer removal, and accelerator is copper sulfate, and the content of copper sulfate is 3.5g / L.

[0017] The content of the upper copper sulfate can also be 2g / L, 5g / L or 10g / L.

[0018] Embodiment three deplating solution is in use, owing to replace the nitric acid in prior art deplating solution with hydrogen peroxide, potassium permanganate, potassium dichromate and chromium trioxide etc. The plastic material itself has adverse effects of corrosion, and in addition, it will not produce a large amount of NO due to the presence of nitric acid 2 Yellow smoke can reduce environmental pollution, reduce harm to human body, help protect the health of operators, and avoid corrosion to plant and equipment; further anti-staining salt contains sodium m-nitrobenzene sulfonate, which is compatible with other ingredients The combination can remove the cop...

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PUM

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Abstract

The invention relates to a de-coating liquid that includes vitriol and oxidant that includes at least from hydrogen peroxide, potassium permanganate, potassium dichromate and chromic anhydride. It also includes reserve salt inter-nitrobenzene sodium xanthate, and accelerating agent copper sulphate. It could effectively decrease the adverse effect of the plastic itself and could decrease environment pollution and decrease harm to human, etc.

Description

technical field [0001] The invention relates to a deplating solution, which is mainly suitable for removing the copper-plated layer or nickel-plated layer on the surface of plastic products. Background technique [0002] In order to make plastic products beautiful and durable, and increase the added value of products, the surface of plastic products is often metallized by electroless copper plating or electroless nickel plating. In order to recycle the surface metallized defective or waste products, it is necessary to remove the metal layer, that is, deplating. In the prior art, often adopt the sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) of the stripping solution for deplating, the above-mentioned stripping solution is likely to have an adverse effect on the plastic material itself due to the presence of strong oxidant nitric acid during deplating. In addition, it is also due to the existence of strong oxidant nitric acid. Metal reaction, nitric acid is not only a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/16
Inventor 陈其亮
Owner MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
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