The Functions and Uses of Diethylene Glycol (DEG) are as follows:
**As a solvent:** Diethylene glycol can effectively dissolve a variety of organic substances, and as a solvent, it helps improve product quality. It is used as a solvent in industries such as textiles, printing and dyeing, leather, and paper. Diethylene glycol is also used as a solvent for nitrocellulose, resins, oils and fats, and printing inks.
**As a plasticizer:** In the plastics and resin industries, diethylene glycol is commonly used as a plasticizer, particularly in the production of unsaturated polyester resins and polyurethane, where it improves the flexibility and durability of products. Diethylene glycol is also used as a plasticizer for rubber and resins.
**As an intermediate in chemical reactions:** Diethylene glycol has high hydroxyl reactivity and plays an important role as an intermediate in chemical synthesis. It can undergo esterification, etherification, and oxidation reactions with acids and bases, and is used in the production of various surfactants, plasticizers, and emulsifiers. Diethylene glycol can be used to produce various chemical products such as ethers, acids, esters, and amines.
**As an antifreeze agent:** In antifreeze formulations, diethylene glycol is often used as a low-temperature protectant. It lowers the freezing point of water, preventing mechanical equipment from freezing and cracking in low-temperature environments. Diethylene glycol is also used as an antifreeze component in brake fluids and compressor lubricants.
**As a lubricant:** Diethylene glycol has good lubricating properties and is widely used in metalworking and mechanical lubrication, effectively reducing friction and extending the service life of equipment.
**Applications in the cosmetics industry:** Diethylene glycol can penetrate the outer layer of the skin and act as a moisturizer, so it is often used as a humectant, solvent, and stabilizer.
**Functions in inks:** Diethylene glycol plays several important roles in inks, including stabilizing emulsions, maintaining ink wetting, and regulating viscosity. Diethylene glycol can form a liquid mixture with various colorants and other additives, thus effectively adjusting the overall performance of the ink. As a wetting agent for inks, diethylene glycol improves the ink’s flowability and viscosity (making it more fluid and manageable). Diethylene glycol can penetrate ink particles and generate affinity with their surfaces, allowing colorants and other additives to be evenly distributed across the wetted surface, thereby enabling the ink to be applied more uniformly to the printing material. Diethylene glycol acts as a dispersing solvent in water-based inks. It has certain hydrophilicity, can react with the lipophilic groups in dye molecules, causing the decomposition and dispersion of the dyes. Diethylene glycol can form hydrogen bonds with water molecules, making it easier for dye molecules in water-based inks to be surrounded and dispersed by water molecules.
**Functions in adhesives:** The role of diethylene glycol in adhesives is to increase the stickiness and fluidity of the glue. By adding an appropriate amount of diethylene glycol, the glue can more easily form a uniform coating layer, and the adhesive strength of the glue is increased, thereby improving the quality of the adhesive.
**Functions in polyurethane:** Diethylene glycol is an important solvent in polyurethane synthesis, as it can effectively dissolve other raw materials, achieving a homogeneous mixture in the reaction system. Diethylene glycol can be used as a chain extender for polyurethane. By reacting with isocyanate to form urethane groups, it increases the molecular weight of the polyurethane. The reaction of diethylene glycol with isocyanate not only produces chain extension but can also form a crosslinked structure. Crosslinked polyurethane has higher strength and abrasion resistance and is widely used in the preparation of adhesives, coatings, and coating materials.
The above are the functions and uses of diethylene glycol. It should be noted that diethylene glycol is toxic, and long-term exposure may have adverse effects on human health. Therefore, when using diethylene glycol, strict adherence to operating procedures and proper personal protection are essential.
Post time: May-21-2026