MUMBAI, India, Sept. 22 -- Intellectual Property India has published a patent application (202611093011 A) filed by Shiv Nadar Institution Of Eminence Deemed To Be University on July 31, 2026, for A Process Of Preparation Of High Refractive Index Benzoxazine-Sulfur Copolymers And Product Thereof.
Inventors include Bimlesh Lochab; Shivani Yadav; Samarendra Pratap Singh; and Ushasri Mukherjee.
The application for the patent was published on September 18, 2026, under issue no. 38/2026.
Abstract: The present invention discloses a process for preparing high refractive index benzoxazine-sulfur copolymers. The copolymer comprises a compound of Formula X selected from Copolymer A, Copolymer B, Copolymer C, and Copolymer D, each derived from cardanol-based benzoxazine monomers and elemental sulfur. The process comprises preparing the benzoxazine monomer by condensation of cardanol, paraformaldehyde, and an amine, followed by inverse vulcanization with elemental sulfur to form a sulfur-rich crosslinked polymer network containing sulfur-sulfur and sulfur-carbon linkages.
Disclaimer: Curated by HT Syndication.
