Answer: polyurethanes

AnswerCrossword Clue
polyurethanesPOLYURETHANE, any of various polymers used esp in flexible and rigid foams, elastomers, and resins also POLYURETHAN
polyurethanesA synthetic resin in which the polymer units are linked by urethane groups, used chiefly as constituents of paints, varnishes, adhesives, and foams