A dye modified peg and its application in acidic bright copper plating

A technology of dye and copper plating, which is applied in dye-modified PEG and its application in acidic bright copper plating, can solve the problems of pinholes and pitting, low upper limit temperature, etc., and avoid salting out and coagulation, Effect of increasing stability and improving deep plating ability

Active Publication Date: 2022-06-21
WENZHOU INST UNIV OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a dye-modified PEG as an important component of acidic bright copper plating brightener, which can solve the problems of low upper limit temperature of existing acidic bright copper plating brighteners and prone to pinholes and pitting

Method used

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  • A dye modified peg and its application in acidic bright copper plating
  • A dye modified peg and its application in acidic bright copper plating
  • A dye modified peg and its application in acidic bright copper plating

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Experimental program
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Embodiment 1

[0033] A dye-modified PEG is a phenolphthalein-modified EO / PO block copolymer (EO%=50%, average molecular weight 1000), and the structural formula is as follows:

[0034]

[0035] The synthesis method of the phenolphthalein-modified EO / PO block copolymer is as follows: take 0.318 g of phenolphthalein, and one end is esterified with p-toluenesulfonyl chloride. The EO / PO block copolymer (EO%=50%, average molecular weight 1000) 2 g, KI 0.200 g, anhydrous potassium carbonate 1.102 g were added to the reactor, 20 ml of anhydrous N,N-dimethylformamide was added, and the reaction was carried out at 80 degrees Celsius for 24 hours under nitrogen protection; cooled, filtered, and the filtrate was reduced. Concentrate under pressure to give an oil. The oil was purified by recrystallization from ether to give 1.585 g of product in 83% yield.

Embodiment 2

[0037] A dye-modified PEG is basic violet 8 modified PEG6000, and the structural formula is as follows:

[0038]

[0039] The synthetic method of described basic violet 8 modified PEG6000 is as follows: take 0.365 grams of basic violet 8, 6 grams of PEG6000 esterified with p-toluenesulfonyl chloride at one end and 0.552 grams of anhydrous potassium carbonate are added to the reactor, and then 50 grams are added. ml of anhydrous acetonitrile, heated and refluxed for 24 hours under nitrogen protection; cooled, filtered, the filtrate was concentrated under reduced pressure, and the obtained oil was recrystallized and purified with diethyl ether to obtain 4.83 g of product with a yield of 78%.

Embodiment 3

[0041] A dye-modified PEG is Rhodamine B-modified PEG1000, and the structural formula is as follows:

[0042]

[0043] The synthetic method of the Rhodamine B-modified PEG1000 is as follows: Dissolve 4.79 g of Rhodamine B in 30 ml of anhydrous dichloromethane, add 0.5 ml of N,N-dimethylformamide to it, and add 0.86 ml of grass under nitrogen protection The acid chloride was stirred and reacted at room temperature for 3 hours; concentrated in vacuo, the residue was dissolved in 30 ml of dry dichloromethane, 10 g of PEG1000 and 4.18 ml of triethylamine were added under nitrogen protection; the mixture was reacted at room temperature for 4 hours; then concentrated under reduced pressure to obtain an oily The oil was recrystallized and purified with ether to obtain 11 g of the product in a yield of 75%.

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Abstract

The invention belongs to the technical field of additives for acidic bright copper plating, and specifically discloses a dye-modified PEG and its application in acidic bright copper plating. The dye-modified PEG described in the invention, by grafting dye molecules onto PEG molecules, can The invention solves the problems that the existing acid bright copper plating brightener has a low upper limit temperature and is prone to pinholes and pits. In the present invention, the dye-modified PEG, polyether surfactant and sulfur compound are pre-prepared as a brightener and applied to acidic copper plating. The overall stability of the brightener is good, and it is simple to add in a tank, easy to add, and easy to manage; electroplating The temperature range is wide, and a bright and smooth coating can be obtained in the temperature range of 15-50°C; the brightness range is wide; in addition, the cost of the brightener of the present invention is low, less than half of the cost of the mainstream dye-based brightener.

Description

technical field [0001] The invention belongs to the technical field of acid bright copper plating additives, in particular to a dye-modified PEG and its application in acid bright copper plating. Background technique [0002] Copper plating is one of the most widely used pre-plating layers in the electroplating industry, including soldering parts, lead-tin alloys, and zinc die-casting parts. Copper plating is required before nickel, gold, and silver plating to improve the adhesion of the plating. The basic components of the electroplating solution for acid copper plating are copper sulfate and sulfuric acid. It has simple components, high current efficiency, fast deposition speed, and simple wastewater treatment. It has become one of the most widely used copper plating processes. In view of the poor uniformity of the copper mold of the acid copper plating solution composed of simple components, the coating is rough, and there is no brightness, etc., it is necessary to add ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/331C08G65/333C08G65/334C25D3/38
CPCC08G65/3318C08G65/33317C08G65/3348C08G65/3346C25D3/38
Inventor 周华彭波谭颖
Owner WENZHOU INST UNIV OF CHINESE ACAD OF SCI
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