US Patent Issued to ZEON on May 12 for "Method for producing hollow particles" (Japanese Inventor)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,198, issued on May 12, was assigned to ZEON Corp. (Tokyo).

"Method for producing hollow particles" was invented by Masashi Watanabe (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "The method produces hollow particles which have a high void ratio, which can reduce the residual amount of a sparingly water-soluble solvent used in the production process, and which are less likely to collapse. The method for producing hollow particles which comprise a shell and a hollow portion and which have a void ratio of 50% or more and 90% or less, wherein a suspension treatment of a mixture liquid containing a polymerizable monomer for shell, a polar resin, a ...