US Patent Issued to NITTO DENKO on July 29 for "Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet" (Japanese Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,598, issued on July 29, was assigned to NITTO DENKO Corp. (Ibaraski, Japan).

"Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet" was invented by Muneshige Nakagawa (Ibaraki, Japan), Hiroaki Takahashi (Ibaraki, Japan), Fumika Kawatake (Ibaraki, Japan), Nobukazu Negishi (Ibaraki, Japan) and Itsuhiro Hatanaka (Ibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A PSA composition comprising a block copolymer of a monovinyl-substituted aromatic compound and a conjugated diene compound, a tackifier resin, and a softening agent is provided. The tackifier resin comprises a natural product-based tackifier resin (A) havin...