Pour point depressants, also known as oil pour point improvers, refer to chemicals that lower the freezing point of lubricating oils, generally high-molecular organic compounds. Commonly used pour point depressants in lubricating oils include alkyl naphthalenes, polyesters, and polyolefins. Polyesters are mainly polymethacrylates, and polyolefins are mainly polyalpha-olefins.

The lubricating oil is mainly prepared with mineral oil as the base oil. Mineral base oil is the base oil obtained by refined processing of petroleum fractions. Petroleum usually contains a certain amount of wax. Most of the petroleum in my country is waxy petroleum. , the wax content of the lubricating oil fraction in some crude oil exceeds 40%. At low temperatures, the wax in the oil will precipitate to form crystals and form a loose and messy three-dimensional crystal network. The oil is wrapped in this loose and messy three-dimensional crystal network, hindering its flow or solidification. When a suitable pour point depressant is added to the oil, the molecules of the pour point depressant will be adsorbed on the wax surface or form a eutectic, which will affect the growth direction and shape of the wax crystals and prevent the wax from forming a network structure and eutectic, thereby effectively Maintains the fluidity of oil at low temperatures.

Alkyl naphthalene is the earliest used pour point depressant for lubricants. Alkyl naphthalene, used as a pour point depressant, is produced using a chlorinated paraffin process and is still widely used. As the main pour point depressant, alkyl naphthalene has good economic performance. Better pour-point depressants can be achieved when used in conjunction with other types of pour-point depressants. As a pour point depressant, alkyl naphthalene also acts as an antioxidant in lubricating oil. It acts as an antioxidant because in a mixture of hydrocarbons, polycyclic aromatic hydrocarbons will oxidize themselves, protecting other hydrocarbons. It slows down the oxidation rate of the entire oil system and acts as an antioxidant. In addition, its oxidation products can also play the role of antioxidants because alkyl naphthalenes are easily oxidized to alkylphenols. Phenols are well-known antioxidants, and the oxidation products of this alkyl naphthalenes still have good Therefore, the freezing point of lubricating oil containing alkyl naphthalene pour point depressant will not increase significantly even if it is deeply oxidized.

Polymethacrylate is a multi-effect lubricating oil additive. As a pour point depressant, it has a good pour point depressing effect in various lubricants. Polymethacrylate also acts as a viscosity index improver in oil products. And the role of anti-foaming agents. Polymethacrylate is an acrylic non-silicon anti-foaming agent. The effect of this type of anti-foaming agent is greatly affected by the lubricating oil system. Therefore, polymethacrylate as a pour point depressant must be coordinated with the anti-foaming agent.

Poly-alpha-olefin is a pour point depressant developed by me. It is a non-surfactant type of pour point depressant. Therefore, using poly-alpha-olefin as a depressant will not cause the surfactant-type pour point depressant. The pour point rebound phenomenon occurs when the oil content increases, but the pour point of the oil increases. Since the poly-alpha-olefin pour point depressant molecule does not contain polar groups, it is best to use it in combination with an alkyl naphthalene pour point depressant or an acrylate pour point depressant, which can make the arrangement and distribution of controlled wax crystals more orderly. , to obtain a better condensation-reducing effect.

The above three kinds of pour point depressants will not negatively impact the oil system's performance. In addition to the pour point depressant function, they can enhance other functions of the oil to a certain extent. Using pour point depressants in lubricating oils can effectively reduce the solidification temperature of mineral lubricating oils, improve the low-temperature fluidity of oils, and significantly improve the performance and economic benefits.

Supplier

Infomak is dedicated to the technology development of special oil additives, combined the Technology of nanomaterials developed dry lubricant and oil additives two series. It accepts payment via Credit Card, T/T, West Union and Paypal. Infomak will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high-quality TR718 Series Pour Point Depressant for Intermediate Base Oil, please feel free to contact us and send an inquiry. (emma@rboschco.com).