MUMBAI, India, June 13 -- Intellectual Property India has published a patent application (202517051413 A) filed by Basf Se, Ludwigshafen am Rhein, Germany, on May 28, for 'value chain return process for the recovery of not bonded additives by extraction from polyurethane or polyisocyanurate rigid foams and depolymerization of the polyurethane rigid foams.'
Inventor(s) include Schaub, Thomas; Telkemeyer, Daniel; Mattke, Torsten; Schuette, Markus; Hashmi, A. Stephen K.; and Klein, Philippe.
The application for the patent was published on June 13, under issue no. 24/2025.
According to the abstract released by the Intellectual Property India: "The present invention is directed to a value chain return process for polyurethane and polyisocyanurate rigid foams containing at least one additive (A1) which is not chemically bonded to the polymer chain selected from the group consisting of phosphorous ester-based flame retardants, polymerization catalysts and surfactants comprising the steps of providing a composition comprising a comminuted polyurethane or polyisocyanurate rigid foam, wherein the comminuted foam has a content of intact cells of less than 10%, based on the number of intact cells of the not comminuted polyurethane or polyisocyanurate rigid foam, and extraction of the additive (A1) with a solvent at a temperature below 190 C."
The patent application was internationally filed on Nov. 02, 2023, under International application No.PCT/EP2023/080535.
Disclaimer: Curated by HT Syndication.
