A kind of antirust emulsion with high oil phase content and preparation method thereof

Abstract

The invention relates to an antirust emulsion high in oil-phase content. The antirust emulsion is prepared from, by weight, wax 1-20%, base oil 1-40%, rust inhibitor 6-10%, emulsifier 2-10% and water 20-60%. The anti-rust emulsion has excellent permeability, can quickly penetrate into the gaps of material combining parts needed to be protected and quickly form a film and provides provide long-term sealed storage antirust protection and temporary antirust protection for metal devices, workpieces, equipment and the like.

Description

technical field [0001] The invention relates to an antirust material, in particular to an antirust emulsion with high oil phase content and a preparation method that can be widely used in long-term storage antirust protection and temporary antirust protection of the surfaces of metal devices, workpieces, equipment, etc. Background technique [0002] Pure oil or pure oil composition has existed in the field of metal anticorrosion for a long time. Such materials are generally a type of temporary protective material formed by adding oil-soluble corrosion inhibitors and other additives to mineral oil, collectively referred to as anticorrosion Rust grease, which has the characteristics of easy material acquisition, low cost, wide adaptability and reliable rust prevention. This kind of material is generally applied by spraying, dipping, and brushing. Since pure oil or the composition of pure oil generally has a relatively large surface tension, it is difficult to spread smoothly o...

AI Technical Summary

Problems solved by technology

The presence of emulsifiers leads to the presence of a large amount of surfactants on the surface of the finally formed dispersed particles. The hydrophilic groups of the surfactants used as emulsifiers will not be blocked after the water volatilizes due to the stretching of the emulsifiers, and will become hydrophilic after encountering water. water and cause redispersion and emulsification of the protective film, thereby causing protection failure; in addition, due to the repulsion effect, after the water in the continuous phase volatilizes, the emulsified oil phase is difficult to fuse between the droplets due to the electric double layer effect of the surfactant, and cannot Form a continuous isolation protective film

For water-in-oil emulsions, the active components exist in the continuous phase, and water cannot volatilize smoothly as the dispersed phase, and the coating film is difficult to dry. Even if a continuous oil film is formed, due to the presence of water, it can still cause flash rust and low film strength and other undesirable situations; in addition, due to the presence of water and emulsifiers, the activity of the rust inhibitor may have been changed, resulting in undesired effects when used in a pure state, such as hydrolysis, etc.

Experience has shown that, while the distribution of rust inhibitors in this type of emulsion may be continuous, the presence of water and emulsifiers severely limits the effectiveness of the rust inhibitor release, ultimately rendering the product inoperable

[0006] (2) In the common oil-in-water emulsions on the market, the content of the oil phase is generally between 10-40wt%, and it is very difficult to prepare an oil-in-water emulsion with an oil phase content of more than 50wt%.

On the one hand, since the antirust agent requires hydrophobicity, water separation, demulsification, and water replacement on the surface of the material, this itself contradicts its requirement to be emulsified into oil-in-water (ability to resist emulsification); on the other hand, high The oil-in-water emulsion with oil phase content is difficult to prepare using conventional technology, even if the emulsification is successful in a short period of time, it will be easy to break and it is very difficult to store it stably

[0007] (3) In order to make the emulsion have good permeability, two methods are usually used. One is to add a large amount of surfactant to reduce the surface tension of the emulsion, making it easy to spread on the surface of the material, but the disadvantage will increase the hydrophilicity of the material; Another method is to reduce the viscosity of the emulsion. The disadvantage is that the viscosity of the emulsion is usually directly related to the solid content of the system. The higher the solid content, the apparent viscosity of the system generally increases and becomes more unstable.

The active ingredient of this patent, i.e. the content of the oil phase, is lower than 40%, which also does not solve the above three shortcomings of the emulsification system

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