Preparation method for electroplating dehydrant

The technology of dehydrating agent and mass ratio is applied in the field of preparation of electroplating dehydrating agent, which can solve the problems of sweat spots, water droplets and poor macular, and achieve the effects of good water replacement performance, improved dehydration reaction activity, and good rust prevention performance.

Inactive Publication Date: 2018-07-13
常州五荣化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of an electroplating dehydrating agent in view of the problems that a certain proportion of sweat spots, water droplets and macular defects will appear on the surface of the electroplating workpiece after the use of the current dehydrating agent

Method used

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  • Preparation method for electroplating dehydrant

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preparation example Construction

[0020] A preparation method of an electroplating dehydrating agent, comprising the steps of:

[0021] (1) Dry the peanut shells, crush them through a 160-mesh sieve, collect the sieved particles, take the sieved particles and add 15% sodium hydroxide solution at a mass ratio of 1:5, stir and mix at 20~25°C for 80~ After 90 minutes, the mixture was obtained. Take the mixture and add 30% 2,3-epoxypropyltrimethylammonium chloride aqueous solution according to the mass ratio of 5:3, stir and mix at 75~80°C for 2~3h, and cool to room temperature , dry, to obtain dry matter, and set aside;

[0022] (2) In terms of parts by mass, take 10~15 parts of heavy alkylbenzene, 7~9 parts of fatty acid chloride, 30~50 parts of dichloroethane, and 2~4 parts of anhydrous aluminum trichloride, mix them in 50~ Stir at 60°C for 3~4h to obtain the stirred mixture A, take the stirred mixture A and add chlorosulfonic acid at a mass ratio of 5:2, raise the temperature to 65~70°C and keep it for 1~2h, ...

Embodiment 1

[0029] A preparation method of an electroplating dehydrating agent, comprising the steps of:

[0030] (1) Dry the peanut shells, crush them through a 160-mesh sieve, collect the sieved particles, take the sieved particles and add 15% sodium hydroxide solution at a mass ratio of 1:5, stir and mix at 20°C for 80 minutes to obtain a mixture , take the mixture and add 30% 2,3-epoxypropyltrimethylammonium chloride aqueous solution according to the mass ratio of 5:3, stir and mix at 75°C for 2 hours, cool to room temperature, and dry to obtain a dried product for future use ;

[0031] (2) In parts by mass, mix 10 parts of heavy alkylbenzene, 7 parts of fatty acid chloride, 30 parts of dichloroethane, and 2 parts of anhydrous aluminum trichloride, and stir at 50°C for 3 hours to obtain a stirred mixture A. Take the stirred mixture A and add chlorosulfonic acid according to the mass ratio of 5:2, raise the temperature to 65°C and keep it for 1 hour, and adjust the pH to 7 to obtain t...

Embodiment 2

[0038] A preparation method of an electroplating dehydrating agent, comprising the steps of:

[0039] (1) Dry the peanut shells, crush them through a 160-mesh sieve, collect the sieved particles, take the sieved particles and add 15% sodium hydroxide solution at a mass ratio of 1:5, stir and mix at 25°C for 90 minutes to obtain a mixture , take the mixture and add 30% 2,3-epoxypropyltrimethylammonium chloride aqueous solution according to the mass ratio of 5:3, stir and mix at 80°C for 3 hours, cool to room temperature, and dry to obtain a dried product for future use ;

[0040] (2) In terms of parts by mass, take 15 parts of heavy alkylbenzene, 9 parts of fatty acid chloride, 50 parts of dichloroethane, and 4 parts of anhydrous aluminum trichloride, mix them, and stir at 60°C for 4 hours to obtain a stirred mixture A. Take the stirring mixture A and add chlorosulfonic acid according to the mass ratio of 5:2, raise the temperature to 70°C and keep it for 2 hours, and adjust t...

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Abstract

The invention discloses a preparation method for an electroplating dehydrant and belongs to the field of chemical engineering. Oxalyl chloride, N,N-dimethylformamide serve as raw materials, dehydration matter based on chloro imine salt is synthesized, dehydration reaction can be conducted under mild conditions, the dehydration matter can be recycled, the center carbon atom electron cloud density is low, dehydration reaction activity is also improved, and fast dehydration drying is achieved. Methylamine, glycolonitrile, oleic acid and phosphorus trichloride serve as raw materials to prepare matter which is capable of forming a film on the surface of metal and has a rust-proof function, the matter conducts adsorption on the surface of electroplated metal to achieve a corrosion inhibition effect, meanwhile water displacement performance of the matter is good, the matter can assist in dehydrating the surface of the metal at the normal temperature, and a later protection function on the electroplated metal is achieved. According to the preparation method, the problems that after an existing dehydrant is used, a certain proportion of sweat points, water drops, yellow spot defects and other phenomena appear on the surface of an electroplated workpiece are solved.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation method of an electroplating dehydrating agent. Background technique [0002] The appearance and color of the workpiece after electroplating can meet the requirements, but the appearance and color of the electroplated workpiece without post-treatment begin to change in a very short period of time, so corresponding post-treatment is required immediately to protect the electroplating The role of the outer surface of the workpiece makes the electroplated workpiece maintain its appearance requirements. [0003] At present, some small electroplating factories mainly use the methods of natural ventilation drying, sun drying and compressed air drying to post-process the electroplated workpieces, but these methods have many problems such as low production efficiency, high energy consumption, and difficult control, and cannot form Continuous and batch production,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/48
CPCC25D5/48
Inventor 林正脉庄文琴刘红妹
Owner 常州五荣化工有限公司
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