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Carrier brightening agent as well as preparation method and application thereof

A technology of carrier brightener and linking agent, applied in the field of carrier brightener and its preparation, can solve the problems of reduced dispersibility, insufficient brightness, poor tolerance and the like

Active Publication Date: 2014-01-15
SHAOGUAN MEITUO WEIZHI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Through the investigation and research on the carrier brighteners for alkaline cyanide-free galvanizing that have been published so far, it is found that although some carrier brighteners have a strong protective function for the high area, they have a strong effect on the refinement of the coating grains, and the dispersion ability Not bad, but it has very poor tolerance to master brighteners traditionally used in galvanizing such as benzylpyridinium-3-carboxylate, added in excess of 0.02 g / l, Blistering
If the benzylpyridinium-3-carboxylate is added less, the brightness is insufficient. It depends on the addition of sulfonated aromatic aldehyde to increase the brightness. Once the sulfonated aromatic aldehyde is added, it is found that the speed of zinc coating in the low area decreases significantly, while for high The area has little effect, which reduces the dispersion ability

Method used

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  • Carrier brightening agent as well as preparation method and application thereof
  • Carrier brightening agent as well as preparation method and application thereof
  • Carrier brightening agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] The carrier brightener provided in this embodiment, the carrier brightener is a random co-condensation polymer, the components participating in the co-condensation, solvent and alkaline substance and the preparation process are as follows:

[0099] Add 82 grams (0.35 moles) of N,N'-bis[3-(dimethylamino)propyl]urea, 34 grams (0.15 moles) of N-[3-(dimethylamino)propyl]-N'-phenylurea mol), water 200 g, and sodium hydroxide 6 g (0.15 mol) were added to a reaction flask equipped with a reflux condenser, thermometer, stirrer, and separatory funnel feeder. Heat until reflux occurs, add 46.8 grams of 2,2′-dichlorodiethyl ether (0.32 moles) and 16.2 grams of 1,4-dichlorobutane (0.13 moles) dropwise from the separatory funnel successively, at a speed that can be stabilized Reflux is in degrees. After adding the linking agent, keep a steady reflux until the reflux is clear and free of oil, then keep warm for 1 hour, stir the whole process, and get the reaction product after cooli...

Embodiment 2

[0101] The carrier brightener provided in this embodiment is a random co-condensation polymer, and the following four components, solvents and alkaline substances are mainly involved in the co-condensation:

[0102]

[0103] The preparation method of the above-mentioned carrier brightener is the same as in Example 1, and the reaction product (effective concentration is about 44%) is obtained after cooling. The infrared spectrum of the dry product in this example shows that it is similar to that of Example 1, so it is not provided here.

Embodiment 3

[0105] The carrier brightener provided in this embodiment is a random co-condensation polymer, and the following three components, solvents and alkaline substances are mainly involved in the co-condensation:

[0106]

[0107] The preparation method of the above-mentioned carrier brightener is the same as in Example 1, and the reaction product (effective concentration is about 48.7%) is obtained after cooling. The infrared spectrum of the dry product in this example shows that it is similar to Example 1, and is not provided here.

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Abstract

The invention discloses carrier brightening agent for alkaline galvanization and zinc alloy electroplate liquid. The carrier brightening agent is a random copolycondensate; and the following three components are mainly participated in copolycondensation: (a), one or more di-tertiary amine containing amide functional groups; (b), one or more single tertiary amine containing amide functional groups; and (c), one or more coupling agent-dihalogenation compounds. The carrier brightening agent has good compatibility with key light agent benzyl pyridine onium-3-carboxylate generally used at present, so that the dependence on sulfonated aromatic aldehyde can be reduced; the foaming trend of clad layers is overcome; the operation window is widened; and the dispersing performance of the plating liquid is improved synchronously. Bright electric plating layers with high dispersibility and high covering force can be obtained; and more importantly, the stripping (foaming) resistance of the plating layers is excellent.

Description

technical field [0001] The invention belongs to the technical field of alkaline galvanizing or zinc alloy electroplating solution, and in particular relates to a carrier brightener and its preparation method and application. Background technique [0002] It has been nearly 150 years since the cyanide galvanizing process was invented in 1855. This process has been prosperous for more than 100 years, which shows that it has strong vitality. It has fine crystallization of the coating, dispersion ability and covering ability of the plating solution. Strong, the anti-impurity ability of the plating solution is good, the coating is pure and has less inclusions, strong binding force with the substrate, and a wide operating window. However, cyanide galvanizing uses sodium cyanide as a chelating agent for zinc ions to increase its electrode potential, so the cyanide galvanizing process produces a large amount of cyanide-containing wastewater, and poor management can easily lead to en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
Inventor 高瑛郑镜飞吴成勇
Owner SHAOGUAN MEITUO WEIZHI CHEM
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