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A kind of preparation method of environment-friendly brightener for galvanizing

A brightener, an environmentally friendly technology, applied in the field of preparation of environmentally friendly brighteners for galvanizing, can solve the problems of rough surface, poor dispersion ability of plating solution, etc., and achieve the effect of bright coating, increased dispersion performance, and increased polarization

Active Publication Date: 2019-11-08
浙江凯诚金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the traditional galvanizing brightener tends to cause poor dispersibility and rough surface of the plating solution, the present invention provides a preparation method of an environment-friendly brightener for galvanizing

Method used

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  • A kind of preparation method of environment-friendly brightener for galvanizing

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preparation example Construction

[0019] A preparation method of an environment-friendly brightener for galvanizing, the preparation method comprising the steps of:

[0020] (1) In terms of parts by mass, take 100-110 parts of isopropanol, 40-43 parts of alkyl glucoside, 27-32 parts of carbamate, 22-25 parts of epichlorohydrin, and 4-7 parts of catalyst;

[0021] (2) Put isopropanol, alkyl glucoside, and epichlorohydrin into the reaction kettle, preheat at 50-60°C for 30-50 minutes, use citric acid to adjust the pH to 4.0-4.5, use nitrogen protection, and heat up to 70~80℃, keep warm for 7~9 hours;

[0022] (3) After the heat preservation is over, add carbamate and catalyst, raise the temperature to 105-110°C, stir for 6-8 hours, cool down to room temperature naturally, collect the reaction mixture, filter, collect the filtrate, adjust the pH to neutral, and then The filtrate is subjected to underpressure distillation to recover isopropanol, and the remaining liquid is collected;

[0023] (4) Concentrate the...

Embodiment 1

[0025] The catalyst is configured by mixing strong acidic styrene-based cation-exchange resin and hydrogen-type cation-exchange resin at a mass ratio of 2:1.

[0026] The anionic surfactant is configured by mixing sodium lauryl sulfate and sodium fatty alcohol polyoxyethylene ether sulfate in a mass ratio of 5:3.

[0027] The configuration of the additive is formed by mixing 5-nitrosalicylic acid and acrylic resin emulsion at a mass ratio of 1:2.

[0028] A preparation method of an environment-friendly brightener for galvanizing, the preparation method comprising the steps of:

[0029] (1) In terms of parts by mass, take 110 parts of isopropanol, 43 parts of alkyl glucoside, 32 parts of carbamate, 25 parts of epichlorohydrin, and 7 parts of catalyst;

[0030] (2) Put isopropanol, alkyl glucoside, and epichlorohydrin into the reaction kettle, preheat at 60°C for 50 minutes, use citric acid to adjust the pH to 4.5, use nitrogen protection, heat up to 80°C, and keep warm for 9 h...

Embodiment 2

[0034] The catalyst is configured by mixing strong acidic styrene-based cation-exchange resin and hydrogen-type cation-exchange resin at a mass ratio of 2:1.

[0035] The anionic surfactant is configured by mixing sodium lauryl sulfate and sodium fatty alcohol polyoxyethylene ether sulfate in a mass ratio of 4:3.

[0036] The configuration of the additive is formed by mixing 5-nitrosalicylic acid and acrylic resin emulsion at a mass ratio of 1:2.

[0037] A preparation method of an environment-friendly brightener for galvanizing, the preparation method comprising the steps of:

[0038] (1) In terms of parts by mass, take 105 parts of isopropanol, 42 parts of alkyl glucoside, 28 parts of carbamate, 4 parts of epichlorohydrin, and 6 parts of catalyst;

[0039] (2) Put isopropanol, alkyl glucoside, and epichlorohydrin into the reaction kettle, preheat at 55°C for 40 minutes, use citric acid to adjust the pH to 4.5, use nitrogen protection, heat up to 75°C, and keep warm for 8 ho...

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Abstract

The invention relates to a preparation method of an environment-friendly type brightening agent for galvanizing and belongs to the technical field of electroplating additives. According to the preparation method, an environment-friendly type surfactant alkyl polyglucoside and carbamate are used as raw materials; alkyl polyglucoside has good dispersion and foaming functions; alkyl polyglucoside andepichlorohydrin are subjected to etherification reaction to form chlorinated alcohol alkyl polyglucoside; then under the action of a catalyst, the hydroxyl of the chlorinated alcohol alkyl polyglucoside reacts with an ester group on carbamate and the dispersion performance is improved; the bonding capability with zinc ions is improved and a current density range is expanded; meanwhile, the dispersion performance of the zinc ions on the surface of a base material is increased; an anionic surfactant and fatty acid polyethylene glycol ester are also added so that a needle hole phenomenon on thesurface of a plating layer is reduced; a compounding effect of 5-nitrosalicylate and acrylic resin emulsion can be used for effectively inhibiting the growth of crystals and a crystal nucleus formation speed is greater than a crystal nucleus growth speed, so that the crystals are more fine and have better flatness.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly brightener for galvanizing, and belongs to the technical field of electroplating additives. Background technique [0002] For a long time in the past, the cyanide galvanizing process has been widely used because of the good stability of the cyanide plating solution, strong throwing ability, fine coating, and good corrosion resistance. However, due to the severe hydrogen evolution in the cyanide galvanizing process, the galvanized layer is very brittle, and the cyanide galvanizing solution is highly toxic, the wastewater treatment is difficult, and the air and groundwater are seriously polluted. Galvanizing and weak acid galvanizing processes are gradually developed and used in industrial electroplating to replace cyanide galvanizing. [0003] Electro-galvanizing is a steel protection method widely used at home and abroad. It has been widely used in many fields such as shipbuildin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 汪逸凡施衍
Owner 浙江凯诚金属制品有限公司