MUMBAI, India, Jan. 2 -- Intellectual Property India has published a patent application (202541123254 A) filed by Vellore Institute Of Technology, Vellore, Tamil Nadu, on Dec. 6, 2025, for 'sustainable polyol recovery from waste polyurethane foam using castor oil glycolysis.'
Inventor(s) include Dr. Mohammed Rehaan Chandan; Ms. Krithika Venkatesan; Ms. Tia Rajesh; and Ms. Tamanna Sood.
The application for the patent was published on Jan. 2, under issue no. 01/2026.
According to the abstract released by the Intellectual Property India: "The present disclosure provides a method (100) for recycling waste flexible polyurethane foam. The method includes cutting (104) waste flexible polyurethane foam into small pieces to increase surface area for reaction, mixing (120) the foam pieces with castor oil as a green solvent and diethanolamine as a catalyst in a weight ratio of polyurethane foam to castor oil to diethanolamine of 1:5:1, heating (80-95) the reaction mixture to a temperature range of 80-95 C to conduct glycolysis and depolymerize urethane bonds, and recovering polyol with a yield of at least 90% (93.97). The method enables sustainable recycling of polyurethane foam waste through low-temperature glycolysis using renewable castor oil solvent, producing recovered polyol suitable for blending with synthetic polyol to form new flexible polyurethane foam products."
Disclaimer: Curated by HT Syndication.
