US Patent Issued to KEMIRA on April 21 for "Process for manufacturing wet strength resins" (Spanish, Finnish Inventors)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,673, issued on April 21, was assigned to KEMIRA OYJ (Helsinki).

"Process for manufacturing wet strength resins" was invented by Xavier De Sequera (Barcelona, Spain), Mehrdad Hesampour (Espoo, Finland) and Judith Tarazona (Villatuerta, Spain).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a process for manufacturing wet strength resins, which process comprises a polyamide reactor for amidation, an EHH reactor for epihalohydrin addition, a maturing tank for maturing, a ring-closure and cross-linking reactor for polymerization, and in the process a reaction mixture containing at least EHH and at least polyaminoamide epihalohydr...