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Lubricant Additive Oxidative Stability
Oct 11, 2017

 lubricant additive Oxidative stability

Phosphate ester

As an additive, phosphate ester has a wide range of USES, and will be interpreted in detail later in the discussion of the unique phosphate series additives of petroleum additives. In this section, the use of phosphate ester as synthetic oil is briefly introduced.

Advantages of phosphate oil: it has good oxidation stability when it contains additives. Good low temperature mobility; (3) flame retardant; Excellent abrasion resistance and abrasion resistance, good friction characteristics; Good radiation stability; The three aromatic phosphate ester is low toxicity; Biodegradable.

Disadvantages of phosphate ester oil: poor viscosity-temperature performance; Hydrolytic stability; The anti-corrosion performance is slightly worse; It is not suitable for other sealing materials except with FPM (fluoride rubber). The mineral oil is not mutually soluble. The main use of industrial phosphate ester oil is in metallurgical industry and coal mine, such as steel block crane, continuous casting, ladle lifting device, slag discharge slag removal equipment, continuous coal mining machine and so on. In the electric power industry steam turbine control system, the aluminum industry hydraulic equipment, automobile manufacturing induction quenching equipment also has applications.

At present, it is gradually being replaced by high water base, water - glycol, and fatty acid ester by flame retardant or anti-flammable (hydraulic) fluid, the dosage of phosphate ester, or the use of it. Dispersant is a kind of surfactant that has two opposite properties, both hydrophilic and hydrophilic. It is also necessary to disperse the solid particles that are difficult to dissolve in liquid, organic pigments, and also to prevent the settling and condensation of solid particles. Dispersant of specific function embodied in the following aspects: reducing dispersion time, improve the luster, improve the tinting strength and hiding power, improve the color and color To prevent the floating color hair flower, prevent flocculation, prevent subsidence.

Most dispersants are used to achieve the purpose of dispersing the packing by wetting, grinding and dispersing, coupling and wrapping. Commonly used coating wetting dispersant has the following five categories: anionic aqueous dispersants, cationic aqueous dispersants, electrically neutral aqueous dispersants, multifunctional water dispersing agent, nonionic aqueous dispersants. The anion price is low, and the non-ions are easy to remove in the coating film.

The advantages of water-based dispersants are as follows:

1. Excellent dispersion and low addition, can quickly reduce the initial viscosity of paint and slurry, and have long-term stability.

2. A small amount of adding can give the coating wettability, so it is not necessary to use with other wetting agents, and can get a good water-resistant coating.

3. The product can be used with less bubbling and quick drying, which can be made easier to paint.

4. Due to the good dispersion of the appearance, the paint is free of color, color shift and good color.