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ABS chromium-free coarsening solution, and preparation method and application thereof

A roughening liquid, ABS plastic technology, applied in liquid chemical plating, superimposed layer plating, coating and other directions, can solve the problem of product not roughening, foaming adhesion, difficult mass production, etc., to achieve good uniformity Roughening ability, damage reduction, low frequency effects

Pending Publication Date: 2019-08-27
南通柏源汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the roughening solution of the manganese dioxide system, a small amount of manganese dioxide is dissolved in the solution, and the rest is dispersed in the powder form in the solution, which will be attached to the surface of the product during the roughening process, resulting in partial roughening or roughening of the product. Insufficient, resulting in the defects of missing plating, foaming and uneven bonding; for the roughening solution of the potassium permanganate system, manganese dioxide will be formed after being reduced in the roughening process, which also has the above-mentioned shortcomings. In addition, high manganese Potassium acid belongs to explosive chemicals, it is difficult to achieve mass production in industry

Method used

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  • ABS chromium-free coarsening solution, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: The complete technological process of ABS coarsening

[0033] 1. Degreasing

[0034] Use a commercially available or disclosed degreasing liquid in the art, for example, a degreasing liquid prepared by using ENPREP142 degreasing powder provided by MacDermides Chemical Co., Ltd. Immerse the ABS sample in the prepared degreasing solution, stir and degrease at 60°C for 7 minutes, and then clean it with pure water. the bonding force between them.

[0035] 2. Pre-coarsening

[0036] Use a pre-roughening solution that is commercially available or disclosed in the art, or make your own pre-roughening solution. For example, 90 g of sodium hydroxide, 103 g of 1-methyl-2-pyrrolidone, and 18 g of ethylene glycol butyl ether were dissolved in deionized water, and the volume was adjusted to 1 L to prepare a pre-roughening solution.

[0037] The ABS plastic workpiece cleaned after degreasing is placed in it, pre-roughened at 40°C for 3 minutes, and then washed with ...

Embodiment 2

[0059] Embodiment 2: Change the roughening liquid composition

[0060] Change the composition of the roughening solution in step 3 of Example 1 to: dissolve 50g of manganese sulfate monohydrate in 200ml of water, stir well until dissolved, and slowly add 150ml of concentrated phosphoric acid and 150ml of methylsulfonate to it under the condition of a cold water bath acid, and finally slowly add 500ml of concentrated sulfuric acid. After the preparation is complete, add the fog suppressant to make the concentration 1ml / L. The temperature of the roughening solution is kept constant at 65°C, and the roughening solution is electrolyzed until the manganese oxide in it reaches 5g / L. The above-mentioned sample after acid leaching was immersed in the roughening solution after electrolysis for 10 minutes, and then cleaned with pure water.

[0061] Finally, a bright and smooth ABS sample with an electroplated copper layer of 40 microns was obtained.

Embodiment 3

[0062] Embodiment 3: Change the roughening liquid composition

[0063] Change the composition of the roughening solution in Step 3 of Example 1 to: dissolve 80g of manganese sulfate monohydrate in 200ml of water, stir well until dissolved, slowly add 200ml of concentrated phosphoric acid and 100ml of methylsulfonate to it under the condition of a cold water bath acid, and finally slowly add 500ml of concentrated sulfuric acid. After the preparation is complete, add the fog suppressant to make the concentration 3ml / L. Keep the temperature of the roughening solution at 60°C, and electrolyze the roughening solution until the manganese oxide in it reaches 8g / L. Immerse the sample after acid leaching in the roughening solution after electrolysis for 5 minutes, and then clean it with pure water.

[0064] Finally, a bright and smooth ABS sample with an electroplated copper layer of 40 microns was obtained.

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Abstract

The invention provides an ABS chromium-free coarsening solution. The coarsening solution is an aqueous solution containing manganese sulfate, sulfuric acid, phosphoric acid and methanesulfonic acid. The invention further provides a coarsening method of the chromium-free coarsening solution for ABS plastic. The prepared chromium-free coarsening solution is electrolyzed by an electrolysis device, the ABS plastic is placed in the coarsening solution for chemical coarsening, and the chromium-free coarsening solution needs to be connected with evaporation equipment so as to maintain the specific gravity of the solution. According to the coarsening solution, the environmental pollution caused by conventional chromium acid coarsening and the use of explosive raw materials such as potassium permanganate are avoided, the coarsening method improves the stability of coarsening liquid and coarsening capability, and the ABS chromium-free coarsening solution has good coarsening effect and industrialapplication value.

Description

technical field [0001] The present invention relates to the technical field of plastic electroplating, in particular to the formulation and preparation of an ABS chromium-free roughening solution, and the application of the ABS chromium-free roughening solution in roughening ABS plastics; the present invention also relates to a roughening solution ABS plastic method. Background technique [0002] ABS plastic (that is, acrylonitrile-butadiene-styrene copolymer) is an electroplating grade resin material widely used in the auto parts industry and the sanitary industry. The principle of its ability to be electroplated is that in the roughening solution of the conventional chromic acid / sulfuric acid system, the A-S skeleton has good chemical stability and is not easily oxidized, and the butadiene in it can be oxidized to form anchor points and colloidal palladium deposits Among them, after debonding, the atomic palladium is exposed, which plays a catalytic role in the chemical n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16C23C18/20C23C18/24C23C18/26C23C18/32C23C28/02C25D5/12C25D5/56C25D3/12C25D3/38
CPCC23C18/1653C23C18/2086C23C18/2093C23C18/24C23C18/26C23C18/32C23C28/023C25D3/12C25D3/38C25D5/12C25D5/56
Inventor 沈宇王植石群松
Owner 南通柏源汽车零部件有限公司
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