MUMBAI, India, May 29 -- Intellectual Property India has published a patent application (202611049367 A) filed by Indian Institute Of Technology, New Delhi, on April 17, for 'upcycling of thermoplastic polyolefins using polymeric long-chain crosslinkers to obtain vitrimer adduct.'
Inventor(s) include Rajiv Kumar Srivastava; Sagnik Ghosh; Soumik Kumar; Ashish Kumar Yadav; Advitiya Kumar; and Bhanu Nandan.
The application for the patent was published on May 29, under issue no. 22/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to an upcycling method for thermoplastic polyolefins (TPOs) to produce high value vitrimer adducts exhibiting enhanced recyclability and mechanical performance. The method comprises grafting a thermoplastic polyolefin with an unsaturated anhydride or acid to introduce reactive functionalities, followed by dynamic crosslinking with a long-chain polymeric glycidyl-containing crosslinker in the presence of a transesterification catalyst. The resulting vitrimer network is formed via epoxy-anhydride or epoxy-acid exchange reactions, enabling reversible bond exchange at elevated temperatures. The developed materials retain mechanical strength, flexibility, and structural integrity over multiple melt-processing cycles, while exhibiting properties such as shape memory, self-healing, and high-temperature stability."
Disclaimer: Curated by HT Syndication.
