It is the trade name of Tosoh’s specialty amine catalysts for polyurethanes.conventional catalysts, reactive catalysts, acid-blocked catalysts, and trimerization catalysts are available. Specialty grades are available to meet the requirements of a variety of polyurethane applications; e.g. SPF series for flexible molded foams, HX series for semi-rigid foams, B series for rigid foams and F series for CFC reduction foams.