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Preparation method of semi water-based liquid crystal cleaning compound

A cleaning agent, semi-water-based technology, applied in detergent compositions, chemical instruments and methods, soap detergent compositions, etc., can solve the problems of ineffective removal of metal ions, electrode residual corrosion, etc., and achieve low toxicity and clean The effect of simple process

Inactive Publication Date: 2016-01-20
CHANGZHOU OPTICAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: Aiming at the disadvantage that the current liquid crystal cleaning agent cannot effectively remove the residual metal ions on the surface of the liquid crystal, resulting in residual corrosion of the electrode, a preparation method of a semi-water-based liquid crystal cleaning agent is provided. The present invention utilizes the prepared Polyoxyethylene polyoxypropylene block polyether is used as surfactant, and then emulsifier, chelating agent, organic base, sodium metasilicate pentahydrate and other additives are added to prepare a semi-water-based liquid crystal cleaning agent. The polyoxyethylene polyoxypropylene block polyether surfactant used in the cleaning solution of the invention has low toxicity, is stable to acid and alkali, and has a good decontamination effect. Adding a chelating agent and an organic base can effectively remove metal ions on the liquid crystal surface, and The cleaning process is simple and easy to operate, friendly to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation steps of described polyoxyethylene polyoxypropylene block polyether are:

[0025] First, add 100-200g of propylene glycol as an initiator in a 1L stainless steel high-pressure reaction kettle, and then add 0.3-0.5g of KOH as a catalyst after heating up to 100-120°C, and feed nitrogen into the reaction kettle to Slowly add 100-200g of ethylene oxide into the kettle and react for 10-15min; Slowly add 100-200g of propylene oxide, and react for 30-40min under stirring; after the reaction, slowly add 100-200g of ethylene oxide again, and keep the reactor at 180-200°C. It is 0.3Mpa, after the reaction is aged, the temperature is lowered to room temperature, and then the material is discharged to obtain polyoxyethylene polyoxypropylene block polyether.

example 1

[0027] First by weight parts, choose 10 parts of sodium lauryl sulfate respectively, 20 parts of polyoxyethylene polyoxypropylene block polyethers, 5 parts of fatty alcohol polyoxyethylene ethers and 15 parts of triethanolamine oleic acid soaps are added to In the three-necked flask, add 50 parts of deionized water to the flask, raise the temperature to 50°C, and stir with a magnetic stirrer for 30 minutes to mix the solution evenly; heat the uniformly mixed solution to 80°C first, and then weigh the total Add 5% ethanolamine as an emulsifier, 15% ethylene glycol butyl ether as a co-solvent and 0.2-% EDTA as a chelating agent to the mixed solution, and continue stirring for 20-25 minutes. Put the solution for 5 minutes; add 5% of the total mass of sodium metasilicate pentahydrate to the solution after standing, keep the temperature at 80°C, and slowly add 20% ethanolamine organic base to the mixed solution to adjust the pH of the solution to 11, then carry out the stirring rea...

example 2

[0033] First in parts by weight, 15 parts of sodium lauryl sulfate, 15 parts of polyoxyethylene polyoxypropylene block polyethers, 7 parts of fatty alcohol polyoxyethylene ethers and 15 parts of triethanolamine oleic acid soap are added to In the three-neck flask, add 48 parts of deionized water to the flask, raise the temperature to 55°C, and stir with a magnetic stirrer for 35 minutes to make the solution evenly mixed; warm the uniformly mixed solution to 85°C first, and then weigh the total Add 6% ethanolamine as an emulsifier, 17% ethylene glycol butyl ether as a co-solvent and 0.25% EDTA as a chelating agent to the mixed solution, and continue to stir for 23 minutes. After the stirring is completed, let the solution stand for 5 minutes Add 5% of the total mass of sodium metasilicate pentahydrate to the solution after standing, keep the temperature at 85°C, then slowly add 25% mass fraction of ethanolamine organic base to the mixed solution to adjust the pH of the solution ...

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Abstract

The invention discloses a preparation method of a semi water-based liquid crystal cleaning compound, and belongs to the technical field of cleaning. According to the preparation method, polyoxyethylene polyoxypropylene block polyether is taken as a surfactant; additives such as an emulsifier, a chelating agent, an organic base, and sodium metasilicate pentahydrate are added so as to obtain the semi water-based liquid crystal cleaning compound. Toxicity of the polyoxyethylene polyoxypropylene block polyether surfactant is low, and the surfactant possesses acidic and basic stability, and excellent decontamination effects; adding of the chelating agent and the organic base is capable of removing metal ions on liquid crystal surfaces; a cleaning method is simple; operation is simple; and the semi water-based liquid crystal cleaning compound is friendly to the environment.

Description

technical field [0001] The invention discloses a preparation method of a semi-water-based liquid crystal cleaning agent, which belongs to the technical field of cleaning. Background technique [0002] At present, most enterprises use Freon (CFC-113), 1,1,1-trichloroethane, carbon tetrachloride and other ozone-depleting substances (abbreviated as ODS) as electronic cleaning agents for cleaning. Because of their good chemical stability, low toxicity, non-combustibility, low surface tension, no damage to the material to be cleaned, strong permeability, quick-drying and many other superior properties, they are widely used as TV picture tubes, printed circuit boards, etc. Cleaning agents for boards, semiconductors, electronic instruments, precision parts, liquid crystal displays, etc. But they have the following defects: (1) there are substances that destroy the ozone layer in the cleaning agent, and their use will be limited and replaced at present; (2) the pollutants remaining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D10/04C11D1/722C11D3/33C11D3/30
Inventor 陈毅忠王志慧
Owner CHANGZHOU OPTICAL MATERIAL
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