MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202647075501 A) filed by Sabic Global Technologies B. V. on June 18, 2026, for Process For Producing Polycarbonate.
Inventors include Kumar, Prashant; Hollar,jr, William Earl; Serna Felix, Lourdes Virginia; Mateos Salvador, Fernan; Nelson, Mark Erik; and Nguyen, Hoang.
The application for the patent was published on June 26, 2026, under issue no. 26/2026.
Abstract: The invention relates to a process for producing polycarbonate comprising the steps of a) providing a solution of polycarbonate in an organic solvent wherein the solution comprises 5 - 40 wt.% of polycarbonate, based on the weight of the solution, b) concentrating and heating the solution of step a) to form a concentrated polycarbonate melt comprising the solvent wherein the concentrated polycarbonate melt comprises at most 5 wt.% and more than 500 ppm of solvent, based on the weight of the concentrated polycarbonate melt and c) further concentrating the concentrated polycarbonate melt of step b) to a polycarbonate comprising at most 500 ppm of organic solvent, using one or more mechanical finishers, wherein inside the mechanical finisher(s) the concentrated polycarbonate melt is maintained in molten state under vacuum conditions at a pressure of at most 500 mbar and wherein said mechanical finisher(s) continuously or intermittently allow(s) for the renewal of the surface area of the polycarbonate melt that is exposed to the vacuum.
Disclaimer: Curated by HT Syndication.
