US Patent Issued to TOSOH on April 22 for "Blocked isocyanate composition, production method thereof, curing agent for paint, paint composition and coated film" (Japanese Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,193, issued on April 22, was assigned to TOSOH Corp. (Shunan, Japan).

"Blocked isocyanate composition, production method thereof, curing agent for paint, paint composition and coated film" was invented by Yuji Nakashima (Yokkaichi, Japan), Shuto Noguchi (Yokkaichi, Japan) and Mitsushige Ikemoto (Yokkaichi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A production method of a blocked isocyanate composition, including a step of mixing and reacting a polyisocyanate and an oxime-based blocking agent, in which a ratio of an amount of the oxime-based blocking agent mixed to an amount of the polyisocyanate mixed is 0.91 to 0.99 in terms of an equiva...