MUMBAI, India, July 25 -- Intellectual Property India has published a patent application (202414101531 A) filed by Infineum International Limited, Abingdon, U.K., on Dec. 20, 2024, for 'lubricant compositions containing low phosphorus and low sulphated ash.'
Inventor(s) include Acosta, Ali; Shen, Xiaobo; Gusman, Claire; and Killian, Gregory.
The application for the patent was published on July 25, under issue no. 30/2025.
According to the abstract released by the Intellectual Property India: "This invention relates to a lubricating oil composition having a phosphorus content of less than 800 ppm, such as less than or about 500 ppm, and a SASH content of less than 0.9 %, such as less than or about 0.5 %, comprising a dispersant mixture, the dispersant mixture comprising (1) 0.01-15 mass% based upon the total mass of the dispersant mixture, of an amide, imide, and/or ester functionalized partially or fully saturated polymer comprising C4-5 olefins having: i) an Mw/Mn of less than 2, ii) a Functionality Distribution (Fd) value of 3.5 or less, and iii) an Mn of 10,000 g/mol or more (GPC-PS) of the polymer prior to functionalization; and (2) 50-90 mass% based upon the total mass of the dispersant mixture, of one or more poly(alkenyl) succinimide(s), which is derived from a polyalkenyl-substituted succinic anhydride prepared using a chlorine-assisted alkylation process and a polyamine; and (3) 10-30 mass% based upon the total mass of the dispersant mixture, of one or more poly(alkenyl)succinimide(s), which is derived from a polyalkenyl succinic anhydride prepared using a halogen-free thermal alkylation process and a polyamine."
Disclaimer: Curated by HT Syndication.
