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Process for metallizing nonconductive plastic surfaces

A metallization and plastic technology, which is applied in the direction of chemical instruments and methods, surface etching compositions, metal material coating technology, etc., can solve the problems of increasing the temperature of etching solution, affecting the etching performance, and low solution stability, and achieves Effective effect of etching process

Inactive Publication Date: 2015-08-19
ATOTECH DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The etching solution may absorb water vapor from the ambient air and may adversely affect etching performance due to the resulting dilution
One solution to this problem is to increase the temperature of the etching solution, however, this may cause the solution to be less stable

Method used

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  • Process for metallizing nonconductive plastic surfaces
  • Process for metallizing nonconductive plastic surfaces

Examples

Experimental program
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Embodiment Construction

[0091] The embodiments described hereinafter are intended to illustrate the present invention in detail.

[0092] ABS (acrylonitrile-butadiene-styrene copolymer) and PC / ABS (45% by weight polycarbonate and 55 % by weight of acrylonitrile-butadiene-styrene copolymer) for etching: 30% by volume to 70% by volume of sulfuric acid solution containing 1g / l to 20g / l of potassium chlorate (KClO 3 ) and 10 g / l of potassium periodate (KIO 4 ); or a similar solution in which 0.1 g / l to 8.0 g / l soluble vanadium compound is added to the solution under the above conditions.

[0093] After etching, the plastic is immersed in a neutralizing solution containing 10 g / l NaOH at room temperature for 2 minutes and then activated in a solution of a palladium compound (5 minutes at 20° C.). PdCl in solution 2 The concentration was 0.1 g / l and the pH of the solution was 2.7. After activation in the Pd solution, the plastic was kept in a pH 9 solution containing 20 g / l sodium hypophosphite at 60° ...

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Abstract

The present invention relates to a process for metallizing nonconductive plastics using an etching solution free of hexavalent chromium. The etching solution is based on an sulphuric acidic solution comprising a source of chlorate ions and a vanadium compound. After the treatment of the plastics with the etching solution, the plastics are metallized by means of known processes.

Description

technical field [0001] The present invention relates to the pretreatment of insulating plastic surfaces prior to their metallization and can be applied in various industries where decorative or functional metallic coatings of plastic parts are required. The pretreatment is carried out in a hexavalent chromium-free solution containing oxidizing and stabilizing compounds. Background technique [0002] A conventional method of pretreatment of insulating plastic surfaces prior to their electroless metallization consists of etching the surface in a solution containing hexavalent chromium, followed by ion or colloidal treatment of palladium compounds. activation in solution, either reduction in sodium hypophosphite solution (in most cases), or acceleration in an acidic solution (usually hydrochloric acid) of palladium ions or colloidal palladium particles respectively adsorbed on the plastic surface, The electroless metallization of the insulating plastic surface is mainly electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K13/04C23C18/22C23C18/16C23C18/24C23C18/28C23C18/30
CPCC23C18/24C23C18/40C09K13/04C23C18/1653C23C18/30C25D5/50C23C18/405C25D3/38C23C18/2086C23C18/285C25D3/18C23C18/36C23C18/22C08J7/06C08J7/044C23C18/34C25D3/12C25D5/34
Inventor 莱奥纳斯·纳鲁斯克维丘什达纳斯·布迪洛夫斯基斯奥纳·吉列内洛雷塔·塔马绍斯凯特·塔马休奈特
Owner ATOTECH DEUT GMBH