A kind of phosphorus-free normal temperature composite metal surface degreasing agent

A metal surface, composite technology, applied in the field of degreasing, can solve the problems of environmental pollution, large foam, poor dispersion performance, etc.

Active Publication Date: 2021-07-06
上海光华金属表面处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional degreasing agents generally have large foams, poor dispersion performance, oil stains are easy to contaminate the metal surface, and the degreasing speed is slow, especially at low temperature conditions. The degreasing effect is even worse
And the discharge of waste liquid contains a large amount of phosphorus, which will cause environmental pollution
[0006] Generally, degreasing agents contain a large amount of phosphorus, and the temperature used is generally between 45-65°C. At room temperature, these degreasing agents have extremely poor ability to remove oil stains, and the workpiece needs to be soaked for more than 2-12 hours to barely remove oil stains.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 60kg of sodium fatty acid methyl ester ethoxylate sulfonate, 30kg of cocamidopropyl betaine, 56kg of sodium silicate, 56kg of sodium metasilicate, 13kg of sodium citrate, and 22kg of ethylenediaminetetraacetic acid Disodium, 11kg of calcium formate, and 750kg of water are mixed and stirred until clarified to obtain the finished product.

[0022] Its preparation method comprises the following steps in turn:

[0023] Step 1), take raw materials according to formula quantity;

[0024] Step 2), add water to the reactor, then add disodium edetate and calcium formate into the reactor, open the reactor and stir for 60 minutes;

[0025] Step 3), add sodium citrate, sodium metasilicate, sodium silicate, fatty acid methyl ester ethoxylate sodium sulfonate respectively in the reaction kettle again, stir 120 minutes;

[0026] Step 4), add cocamidopropyl betaine in reactor again, the internal temperature of reactor during stirring is controlled at 36-43 ℃, stirs 100 minutes; ...

Embodiment 2

[0030] 66kg sodium fatty acid methyl ester ethoxylate sulfonate, 33kg cocamidopropyl betaine, 60kg sodium silicate, 60kg sodium metasilicate, 14kg sodium citrate, 25kg ethylenediaminetetraacetic acid Disodium, 12.5kg of calcium formate, 750kg of water are mixed and stirred until clear to obtain the finished product.

[0031] Its preparation method comprises the following steps in turn:

[0032] Step 1), take raw materials according to formula quantity;

[0033] Step 2), add water to the reactor, then add disodium edetate and calcium formate into the reactor, open the reactor and stir for 80 minutes;

[0034] Step 3), add sodium citrate, sodium metasilicate, sodium silicate, fatty acid methyl ester ethoxylate sodium sulfonate respectively in the reaction kettle again, stir 160 minutes;

[0035] Step 4), add cocamidopropyl betaine in reactor again, the internal temperature of reactor during stirring is controlled at 36-43 ℃, stirs 120 minutes;

[0036] Step 5), the liquid ins...

Embodiment 3

[0039] 70kg sodium fatty acid methyl ester ethoxylate sulfonate, 35kg cocamidopropyl betaine, 63kg sodium silicate, 63kg sodium metasilicate, 15kg sodium citrate, 26kg ethylenediaminetetraacetic acid Disodium, 13kg of calcium formate, 750kg of water are mixed and stirred until clear to obtain the finished product.

[0040] Its preparation method comprises the following steps in turn:

[0041] Step 1), take raw materials according to formula quantity;

[0042] Step 2), add water into the reactor, then add disodium edetate and calcium formate into the reactor, open the reactor and stir for 90 minutes;

[0043] Step 3), add sodium citrate, sodium metasilicate, sodium silicate, fatty acid methyl ester ethoxylate sodium sulfonate respectively in reaction kettle again, stir 180 minutes;

[0044] Step 4), add cocamidopropyl betaine in reactor again, the internal temperature of reactor during stirring is controlled at 36-43 ℃, stirs 150 minutes;

[0045] Step 5), the liquid inside ...

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Abstract

The invention relates to a non-phosphorous normal temperature composite metal surface degreasing agent, which is prepared by the following method: sodium fatty acid methyl ester ethoxylate sulfonate, cocamidopropyl betaine, sodium silicate, sodium metasilicate, Sodium citrate, disodium edetate, calcium formate, and water are mixed and stirred until clear to obtain the finished product. The non-phosphorus normal temperature composite metal surface degreasing agent does not contain environmental protection and controlled substances such as phosphorus and nitrite, is safe and environmentally friendly, and can be discharged directly after use; at a normal temperature of 25°C, its degreasing efficiency exceeds 99%; the degreasing temperature Low, the degreasing time is as short as 1 to 3 minutes, the degreasing efficiency is high, low foam, solubilization and detergency are good.

Description

technical field [0001] The invention relates to a phosphorus-free normal-temperature composite metal surface degreasing agent, which belongs to the technical field of degreasing. Background technique [0002] Before metal chemical treatment, electroplating and coating, degreasing agent should be used to remove grease and mineral oil on the metal surface. The composition of the main degreasing agent is as follows: alkaline degreasing agent, emulsion degreasing agent, solvent degreasing agent. [0003] The degreasing agent formula based on surfactant will not damage the texture of metal products when cleaning the metal surface, and a small amount of degreasing agent can emulsify and disperse a large amount of oil, so that the oil dirt is easy to separate from the metal surface, which is an ideal type Metal cleaner. Commonly used surfactants include anionic surfactants such as LAS and AOS and nonionic surfactants such as AEO. The former has strong detergency, but poor resist...

Claims

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Application Information

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IPC IPC(8): C23G1/14
CPCC23G1/14
Inventor 吴晓晨陈虎官冰
Owner 上海光华金属表面处理有限公司
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