Intellectual Property India Publishes Patent Application for Viscosity Index Improver Additives Of Lubricating Oils And Process For Their Preparation

MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202647074815 A) filed by Versalis S. P. A. on June 17, 2026, for Viscosity Index Improver Additives Of Lubricating Oils And Process For Their Preparation.

Inventors include Perretta, Costantino; Regattieri, Giovanni; Urbinati, Sabrina; and Perin, Nicola.

The application for the patent was published on June 26, 2026, under issue no. 26/2026.

Abstract: Viscosity index improver (V.I.I.) additive of lubricating oils comprising a hydrogenated linear polybutadiene, said hydrogenated linear polybutadiene having the following characteristics: - weight average molecular weight (Mw) comprised between 1000 Dalton and 40000 Dalton, preferably comprised between 1500 Dalton and 38000 Dalton; - a content of units having configuration 1,2 comprised between 40% by weight and 80% by weight, preferably comprised between 45% by weight and 75% by weight, with respect to the total amount of butadiene units present in said hydrogenated linear polybutadiene; - a polydispersion index (PDI), that is, the ratio between the weight average molecular weight (Mw) and the number average molecular weight (Mn) (Mw/Mn), less than or equal to 1.3, preferably comprised between 1 and 1.1; - a degree of hydrogenation greater than or equal to 98%, preferably comprised between 98.5% and 100%; - a dynamic viscosity, measured at 40°C, comprised between 5 Pa*s and 10000 Pa*s, preferably comprised between 10 Pa*s and 8000 Pa*s; - a dynamic viscosity, measured at 100 C, comprised between 0.1 Pa*s and 1000 Pa*s, preferably comprised between 0.2 Pa*s and 500 Pa*s; - an enthalpy of crystallization (?Hc), determined by temperature modulated differential scanning calorimetry (TMDSC), comprised between 0 J/g and 1 J/g, preferably comprised between 0 J/g and 0.8 J/g. The aforesaid improver (V.I.I.) additive of lubricating oils is advantageously usable in compositions of lubricating oil such as, for example, compositions of lubricating oil for both diesel and petrol passenger cars, or for heavy duty diesel engines, in functional fluids such as, for example, fluids for manual or automatic transmission, hydraulic fluids, and in industrial lubricants (for example, gear lubricants for wind turbines).

Disclaimer: Curated by HT Syndication.