MUMBAI, India, Sept. 22 -- Intellectual Property India has published a patent application (202647101886 A) filed by Versalis S. P. A. on August 24, 2026, for Functionalized Styrene-Butadiene Random Copolymers And Process For The Preparation Thereof.
Inventors include Solito, Antonio Giuseppe; Morbidelli, Marco Valerio; Coppola, Salvatore; and Regattieri, Giovanni.
The application for the patent was published on September 18, 2026, under issue no. 38/2026.
Abstract: Functionalized styrene-butadiene random copolymer having the following characteristics: (i) a glass transition temperature (Tg) comprised between -80°C and -55°C, preferably comprised between -75°C and -60°C; (ii) a content of styrene units comprised between 5% by weight and 25% by weight, preferably comprised between 10% by weight and 20% by weight, more preferably comprised between 13% by weight and 17% by weight, with respect to the total weight of the copolymer; (iii) a content of 1,2-vinyl units comprised between 15% by weight and 50% by weight, preferably comprised between 20% by weight and 40% by weight, more preferably comprised between 30% by weight and 36% by weight, with respect to the total weight of the butadiene units; (iv) a peak average molecular weight (Mp) comprised between 100 kDa and 250 kDa, preferably comprised between 150 kDa and 195 kDa; (v) 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 1.5, preferably comprised between 1.1 and 1.45; (vi) a Mooney viscosity (ML1+4@100°C) comprised between 40 and 120, preferably comprised between 50 and 90, more preferably comprised between 55 and 75; (vii) polystyrene blocks wherein the polymer chains consisting of a chain of at least 16 consecutive styrene units are present in an amount less than or equal to 5% by weight, preferably less than 3% by weight, more preferably less than 1% by weight, with respect to the total weight of the styrene units present in the copolymer. The aforesaid functionalized styrene-butadiene random copolymer is advantageously usable in elastomeric compositions, in particular in silica-based elastomeric compositions, which in turn can be used for the production of tires, in particular tire treads, having a good rolling resistance, thereby allowing lower energy consumption (i.e. lower fuel consumption). More in particular, said functionalized styrene-butadiene random copolymer is advantageously usable in elastomeric compositions that can in turn be used for the production of winter and all-season tires that must guarantee excellent performance under "extreme" conditions such as wet, snow and ice.
Disclaimer: Curated by HT Syndication.
