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Aerospace precision industrial cleaning agent

An aerospace precision and cleaning agent technology, applied in the field of cleaning agents, can solve problems such as potential safety hazards and affecting launch missions, and achieve the effects of reducing COD value, low cleaning cost, and mild cleaning conditions

Inactive Publication Date: 2018-03-09
BEIJING AEROSPACE YISEN WIND TUNNEL ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of aerospace, the requirements for degreasing and cleaning of various pipe fittings are getting higher and higher. The residual grease and excess in the pipe fittings will cause great safety hazards and affect the entire test and launch mission.

Method used

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  • Aerospace precision industrial cleaning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to Embodiment 7

[0053] The proportioning of cleaning agent in embodiment 1 to embodiment 7 is shown in table 1.

[0054] The proportioning of each component in cleaning agent in table 1 embodiment 1 to embodiment 7

[0055]

[0056] Carry out test experiment to the cleaning agent of embodiment 1 to embodiment 7.

[0057] (1) KB value analysis

[0058] The KB value of table 2 embodiment 1 to embodiment 7 cleaning agents

[0059]

[0060] The KB values ​​of Embodiment 1 to Embodiment 7 are shown in Table 1. The KB value represents the index of the relative solubility of hydrocarbon solvents. The larger the KB value, the stronger the solvent solubility. For cleaning agent solutions, the KB value is not required to be too high. If the KB value is too high, the solubility is large.

[0061] (2) Analysis of solubility parameter SP value

[0062] The solubility parameter SP value of embodiment 1 to embodiment 7 sees figure 1 ,from figure 1 It can be seen that the overall data is basicall...

Embodiment 8 to Embodiment 19

[0083] See Table 3 for the proportioning of the cleaning agents of Examples 8 to 19.

[0084] The proportioning of each component in table 3 embodiment 8 to embodiment 19

[0085]

[0086] Various performances of the cleaning agents of Examples 8 to 19 were tested. For specific test results, see Figure 7 to Figure 13 ,in, Figure 7 to Figure 13 The numbers A1, A2, A3, B1, B2, B3, C1, C2, C3, D1, D2 and D3 on the middle abscissa represent Embodiment 8 to Embodiment 19 in sequence.

[0087] (1) KB value analysis

[0088] Such as Figure 7 Shown, the KB value of embodiment 8 to embodiment 19 cleaning agent satisfies the requirement of precision cleaning agent in theory, and the KB value of precision cleaning agent can not be too high, if the metal material surface of cleaning has composite material, KB value can be too high Surface composite material dissolves, causing damage to cleaned material. Dichloromethane content is at 93%-95%, and when ethanol, ethyl acetate con...

Embodiment 20 to Embodiment 23

[0102] See Table 4 for the proportioning of the cleaning agents in Example 20 to Example 23.

[0103] The proportioning of each component in the cleaning agent of table 4 embodiment 20 to embodiment 23

[0104]

[0105] In Example 21 to Example 23, the mass percentage of nonionic surfactant in the cleaning agent is 2%, and the mass ratio of dichloromethane, ethanol and ethyl acetate in the cleaning agent is 93% respectively , 3% and 2%.

[0106] Nonionic surfactants used:

[0107] Performance parameters of EL-20: name: castor oil polyoxyethylene ether; appearance: light yellow liquid; hydroxyl value: 90-100; PH: 5-7.

[0108] Performance parameters of OP-10: name: octylphenol polyoxyethylene ether; appearance: yellow viscous liquid; hydroxyl value: 83-93; PH: 5-7.

[0109] Performance parameters of TWEEN-20: name: sorbitol polyoxyethylene ether; appearance: light yellow viscous liquid; hydroxyl value: 90-110; PH: 5-7.

[0110]Various performances of the cleaning agents ...

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Abstract

The invention discloses an aerospace precision industrial cleaning agent which comprises, in weight percent, 85-95% of dichloromethane, 0-15% of ethyl alcohol and 0-15% of ethyl acetate. The cleaningagent is high in dirt cleaning speed, thorough in scale dissolution, low in cleaning cost, low in toxicity for organisms and environments, mild in cleaning condition, independent of reinforcement conditions, nonflammable, non-explosive, free from phosphorus and environmentally friendly, the components are inexpensive and easy to obtain, excessive resource consumption is omitted, COD (chemical oxygen demand) values are decreased, insoluble substances do not remain on the surface of a cleaning object in the cleaning process, new dirt is avoided, a new covering layer harmful to subsequent handling is not formed, product quality cannot be affected, and foam and undesirable odor affecting the cleaning process and spot sanitation are avoided.

Description

technical field [0001] The invention belongs to the field of cleaning agents, in particular to an aerospace precision industrial cleaning agent used for degreasing and cleaning precision aerospace pipe fittings. Background technique [0002] Cleaning agent is a large category with a wide variety, including inorganic cleaning agents and organic cleaning agents. Organic cleaning agents are cleaning agents made of carbon-containing compounds, and inorganic cleaning agents are made of carbon-free compounds. detergent. Cleaning agents are divided into cleaning agents (water-based), cleaning agents (semi-water-based), and cleaning agents (solvent-based) according to different solvents. [0003] The cleaning agent (water-based type) is composed of surfactants and various additives and auxiliary agents. When cleaning the dirt on the surface of the object, it can reduce the surface tension of the aqueous solution and improve the decontamination effect. According to the appearance o...

Claims

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Application Information

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IPC IPC(8): C11D7/26C11D7/30C11D7/60C11D1/72C11D1/74C11D3/20C11D3/24C11D3/60
CPCC11D1/721C11D1/74C11D3/201C11D3/2093C11D3/24C11D7/261C11D7/266C11D7/30
Inventor 黄玲李登臣
Owner BEIJING AEROSPACE YISEN WIND TUNNEL ENG TECH
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