Basic Information

Definition: Poly(methyl methacrylate) - type pour point depressants are high - molecular polymers polymerized from methyl methacrylate monomers. They reduce the freezing point of oil products and improve their low - temperature fluidity by altering the growth morphology and structure of wax crystals.
Appearance and Properties: Usually colorless to light yellow viscous liquids or solids with a relatively light color. They have good solubility in oil products.

Mechanism of Action

Eutectic Action: The molecular structure of poly(methyl methacrylate) - type pour point depressants contains alkyl chains similar to those of paraffin hydrocarbons. When the temperature of the oil product drops, the pour point depressant molecules form eutectics with paraffin molecules, changing the growth direction and crystal form of wax crystals, and making them generate uniformly loose particles. This delays or prevents the formation of a three - dimensional network structure that causes the oil product to solidify.
Adsorption Action: The pour point depressant molecules can adsorb on the surface of wax crystals, preventing the mutual aggregation and growth of wax crystals. This keeps the wax crystals in a relatively small size, making it difficult to form a large crystallization network, thereby reducing the freezing point of the oil product and improving its low - temperature fluidity.

Performance Characteristics

Excellent Pour Point Depression Effect: It can significantly reduce the freezing point of lubricating oils, diesel fuels and other oil products, effectively improving their low - temperature fluidity. This enables the oil products to maintain good pumpability and lubricity in low - temperature environments.
Good Oil Solubility: It has good solubility in various base oils and can quickly and uniformly disperse in the oil products to exert the pour point depression effect.
Viscosity Index Improvement Function: Some poly(methyl methacrylate) - type pour point depressants can also increase the viscosity index of oil products, enabling the oil products to maintain relatively stable viscosity performance at different temperatures and reducing the amplitude of viscosity changes with temperature.
Shear Stability: It has good shear resistance. When the oil product is subjected to mechanical shear force, the molecular structure is not easily damaged, and the pour point depression effect can be maintained stably.

Application Fields

Lubricating Oil Field: Widely used in various lubricating oil products such as automotive lubricating oils and industrial lubricating oils, including internal combustion engine oils, gear oils, hydraulic oils, turbine oils, etc. It can effectively reduce the pour point of lubricating oils, improve their low - temperature starting performance and pumpability, and reduce engine wear at low temperatures.
Diesel Field: It can rapidly reduce the freezing point of diesel fuel, refine wax crystals, and lower the cold filter plugging point, further improving the low - temperature fluidity of diesel fuel. It is suitable for various grades of diesel fuel, including 0#, - 10#, - 20#, - 35#, etc., effectively solving the problems caused by sudden drops in temperature and cross - regional driving in diesel fuel use.

Typical Products

TD568: Starting from the optimization of molecular structure design and reaction process, it strictly controls strongly polar organic substances. The monomer conversion rate in the polymerization reaction is high, solving the problem that low - molecular polar organic substances and reaction monomers are prone to emulsification. For 43 - 37 - 0 containing TD568, the demulsification time is 2.8 min, and complete demulsification only takes 4.2 min. Its anti - emulsification performance is significantly better than that of the reference agent.
Summary: Through the optimization of molecular structure and reaction process, TD568 has a remarkable effect in improving the anti - emulsification performance of pour point depressants. It can effectively shorten the demulsification time, enhance the water resistance of lubricating oils, and has a positive impact on solving the emulsification defect problem of ester - structured compounds.

TD668: It is a high - efficiency and light - colored poly(methyl methacrylate) - type pour point depressant. It has good pour point depression effect and low - temperature performance, and also has the function of improving the viscosity index. It can be used to prepare various oil products such as aviation hydraulic oils, hydraulic transmission oils, gear oils, low - pour - point hydraulic oils, and multi - grade internal combustion engine oils.

Physicochemical indicators

Physicochemical indicators of product TD568

Physicochemical indicators of product TD668