Monopropylene glycol in vehicle brake fluid used oils as an ice stopper and lubricant.The third product in a chemical process that begins with propene is a by-product of fossil fuels.It is a colorless liquid with a creamy texture and in addition to medicines and even e cigarettes, it is used in many cosmetic products and processed foods. All of these products rely on it to create a smooth texture and some stabilization.Monopropylene glycol is used as a solvent for oils, greases, waxes and resins. Used in flavorings, perfumes and syrups. Used for cooling systems. Is a fluidizer, used in hydraulic fluid. As a balancer in the textile industry, a solvent and wetting agent is used in the food, medicine and health sectors, especially for molds and fungi, in sunscreens, creams.
Brake fluid is used in car braking systems (commercial and industrial). Due to the viscosity, the fluid is able to transfer the manipulated force through the hydraulic lines to the braking mechanism on the wheels.Vehicle brake fluid consists of 10 to 50 percent by weight of diethylene glycol or dipropylene glycol, preferably 60 to 80 percent by weight of one or more monoalkyls, usually monopropylene glycol. New liquids, in particular, are free of borates and, due to their low humidity, are suitable for use in areas with high relative humidity.Hydraulic fluids, especially brake fluids for motor vehicles, are highly required due to their chemical and physical properties. According to the standards and specifications for brake fluids in standard motor vehicle safety, modern brake fluids must have a high equilibrium reflux boiling point (ERBP) and a high humidity ERBP on one side, but on the other hand must have a viscosity that only in A wide temperature range will change slightly this is a Applications of monopropylene glycol.
In addition, there are more stringent requirements for adequate protection of non-ferrous metals from corrosion by brake fluids, which can be achieved with corrosion inhibitors.DOT 4 commercial brake fluids always contain boric acid esters, for example methyl triglyceride borate, which can hydrolyze certain amounts of penetrant water from the brake fluid. One disadvantage is that boric acid esters are microscopic, so such DOT 4 brake fluids, especially in areas with high relative humidity, such as in the tropics and subtropics, can absorb a lot of moisture quickly. Despite the performance of trapping boric acid esters, the performance of the brake system filled with it can be adversely affected.DOT 4 brake fluids containing 40 to 65% of polyolytic polyethylenes, 16 to 45% of polyglycols and 10 to 19% of boric acid esters with corrosion inhibitors were tested.These borate-free brake fluids contain 30 to 80 percent of the glycol composition and up to 70 percent of the alkyl ether polyglycol.
In this formula, there is a need for low viscosity brake fluids that meet DOT 4 specifications.This brake fluid is not very moisturizing and can be used in areas with high relative humidity. In particular, only a small amount of boric acid esters should be used, or ideally the use of these esters should even be completely redundant.New brake fluids have less moisture due to the lack of borate. This is especially useful when used in tropical and subtropical regions, because, although some water is limited by the addition of borate, water is absorbed relatively quickly. In any case, this will reduce the quality of the brake fluid. In particular, this quality loss often occurs in the braking system of motor vehicles, but also when storing and transporting liquids. New brake fluids do not have these disadvantages.Polyglycols such as monopropylene glycol may further be present as an optional component in new formulations.
The effect of these highly boiling polyglycols, which is a lubricant, is mainly due to the improvement of temperature viscosity behavior. Polyglycols give sufficient viscosity to polyglycol monoalkyl polyethylenes, which are often low in viscosity at high temperatures, thus ensuring adequate lubrication. Adequate lubrication is preferred because in the components of a motor vehicle brake system, tires or elastomers must slide on the metal with very little wear.In addition to significantly reducing dehumidifying properties due to borate release, other advantages of the new DOT 4 brake fluids for detachable motor vehicles are good viscosity at low temperatures, good water compatibility, gentle, low pH and it is good. Temperature, high temperature and good oxidation stability and chemical stability, good behavior against materials such as rubber, plastic, adhesive joints, fibers, elastomers and rubber seals are its advantages.