Why can Polypropylene Glycol Series be used as antifreeze and heat transfer fluid?

Due to its unique physical and chemical properties, the Polypropylene Glycol Series is widely used in various industrial and commercial applications, especially as antifreeze and heat transfer fluid. PPG has low toxicity, thermal stability, low volatility and high viscosity, which makes it perform excellently in cooling systems and is particularly suitable for use in scenarios with high requirements for the environment and human health.

1. Good low-temperature performance
The core requirement of antifreeze is to prevent the system from freezing in low-temperature environments, thereby ensuring the normal operation of mechanical equipment or piping systems. The molecular structure of polypropylene glycol enables it to remain fluid at low temperatures, has a lower freezing point, and generally has better antifreeze ability than water and many common liquids. Compared with ethylene glycol, PPG has a lower freezing point at the same concentration, which makes it a more efficient antifreeze material.
In cold climates, the heat transfer fluid in the cooling system must be able to remain fluid without freezing. Polypropylene glycol can provide good antifreeze effects by adjusting the concentration of the solution. In addition, another advantage of PPG as an antifreeze is that it does not quickly become too viscous as the temperature drops, and it can still maintain good fluidity.

2. Thermal stability and low volatility
Polypropylene glycol has good thermal stability, that is, it does not quickly degrade or undergo chemical changes at high temperatures, which enables it to work for a long time in high temperature environments. Compared with water or ethylene glycol antifreeze, PPG can also maintain its unique physical properties at higher temperatures. This is especially important in equipment that needs to withstand thermal cycles for a long time, such as the cooling system of industrial equipment, HVAC (heating, ventilation and air conditioning) system, or the cooling circuit of automobile engines.
The low volatility of PPG enables it to reduce liquid loss in high temperature environments and avoid frequent replenishment of heat transfer fluid. This feature extends the service life of the cooling system and reduces maintenance costs and energy consumption. Therefore, polypropylene glycol as a heat transfer fluid has shown outstanding economic benefits in industrial and commercial applications.

3. Low toxicity and environmental protection
The low toxicity of polypropylene glycol is another major advantage of it as an antifreeze and heat transfer fluid. Although traditional ethylene glycol performs well in cooling and heat transfer, its high toxicity poses a potential threat to the environment and human health, especially when the system leaks. The PPG series of products have extremely low toxicity, so polypropylene glycol has become the first choice in some scenarios with high safety requirements.

4. Excellent lubricity and corrosion resistance
Polypropylene glycol has natural lubricity, which can reduce friction between mechanical parts, thereby extending the service life of the equipment. During the circulation process, the heat transfer fluid must pass through many metal pipes or pump systems, and the lubricating properties of polypropylene glycol help reduce the wear of these parts. In addition, PPG still has good lubrication effect under low temperature conditions, which is particularly important for equipment in cold environments.
PPG also has good corrosion resistance. Many metal parts in the cooling system are susceptible to corrosion, especially when exposed to moisture or traditional heat transfer fluids for a long time. The chemical inertness of polypropylene glycol enables it to reduce reactions with metal surfaces, reducing the possibility of corrosion. This feature makes PPG particularly suitable for equipment that needs to run for a long time and is difficult to change the heat transfer fluid frequently.

5. Excellent solubility and compatibility
PPG has good compatibility with a variety of solvents and substances, which makes it work well in various cooling and heat transfer systems. Polypropylene glycol can be mixed with water in any proportion, and its freezing point and viscosity can be adjusted by adjusting different concentrations. This flexibility allows PPG to customize the best performance heat transfer or antifreeze solution according to different usage requirements.