Magical Chemistry: Antifreeze with Propylene Glycol

Winter is quietly approaching, is your car about to have its antifreeze replaced? What is the antifreeze with propylene glycol? What are its advantages? Let’s unveil the veil of it today.

What is antifreeze with propylene glycol?

Propylene glycol is a colorless, transparent, viscous liquid with hygroscopicity and can react with acids to form esters. It may dissolve essential oils and be miscible with water, acetone, ethyl acetate, and chloroform. However, it is insoluble in ether and incompatible with paraffin and petroleum ether. It is more stable in low temperatures and more stable in the presence of light and heat.

Depending on its intended purpose, propylene glycol can be divided into three grades: industrial, food, and medicinal. The flavor of propylene glycol of industrial grade is quite peppery. It is mostly utilized in the production of paints, coatings, antifreeze, deicing agents, liquid detergents, and unsaturated polyester resins.

The full name of antifreeze should be called antifreeze coolant, which means coolant with antifreeze function. Antifreeze can prevent the coolant from freezing during cold winter parking, causing the radiator to crack and freezing the engine cylinder block or head. Many people believe that antifreeze is only used in winter, but in fact, antifreeze must be used year-round.

Propylene glycol is used to make a base liquid for refrigeration, and its performance in heat conduction, freezing point protection, and rubber compatibility is comparable to that of ethylene glycol-based refrigerants. In terms of corrosion resistance, toxicity, and biodegradation, it has advantages that ethylene glycol antifreeze is difficult to compare with. What attracts people’s attention when propylene glycol is used as a refrigerant is its anhydrous form, which has truly anti-boiling and anti-freezing properties.

Antifreeze with propylene glycol is an antifreeze formulated using propylene glycol as the base liquid for antifreeze. It is a biodegradable product that does not increase economic and environmental costs in terms of toxicity or biodegradation. This not only conforms to the current concept of green environmental protection but also takes into account the needs of consumers for safe use and ensuring health.

Antifreeze with propylene glycol vs. antifreeze with ethylene glycol

At present, most research and development manufacturers of antifreeze in the market use ethylene glycol as the base liquid for preparing low-conductivity coolants. Due to its excellent performance and low price, it has become the mainstream product in the market. However, ethylene glycol itself has certain toxicity and is not easily biodegradable, so it has a negative impact on the environment. At the same time, ethylene glycol aqueous solution is prone to oxidation in long-term high-temperature environments, leading to an increase in conductivity; At the same time, it will generate acidic substances, which can easily lead to material corrosion.

Antifreeze with propylene glycol can solve the aforementioned adverse effects. Propylene glycol has lower toxicity compared to ethylene glycol while blocking the oxidation of hydroxyl groups in the glycol, preventing the production of acidic substances and giving the product a longer service life.

Comparing ethylene glycol with propylene glycol aqueous solution at the same volume concentration, the stability and resistance to oxidation of propylene glycol solution are unmatched by ethylene glycol solution.

Propylene glycol solution has a low freezing point (anti-icing), high boiling point (anti-boiling), good heat transfer performance, low viscosity at low temperatures, no corrosion to metal, less foam, and is not easy to evaporate.

The disadvantage of antifreeze with propylene glycol is its high price and easy diffusion, which means it should be careful of leakage.

The replacement cycle of automotive antifreeze typically depends on the type of antifreeze and the manufacturer’s recommendations. Generally speaking, regular antifreeze needs to be replaced every two to three years, while long-term antifreeze can be used for five years or more. It is recommended to replace it at a professional car repair shop to avoid affecting the performance and lifespan of the car due to incorrect operation.

Conclusion

To sum up, we discuss antifreeze with propylene glycol. It has many advantages compared to the commonly used ethylene glycol antifreeze in the market, such as higher boiling point, less prone to freezing, more environmentally friendly and can prolong the lifespan of cars. However, there are also rare drawbacks, which are higher prices and easier diffusion after leakage. Antifreeze is not only needed in winter but also throughout the year. It can help maintain a more balanced temperature inside the car, reduce wear on parts, and hurt performance. Please find a professional car manufacturer and replace the antifreeze according to actual needs.