| Answer | Crossword Clue |
|---|---|
| polystyrene | A synthetic resin that is a polymer of styrene, used chiefly as lightweight rigid foams and films |
| polyurethane | A synthetic resin in which the polymer units are linked by urethane groups, used chiefly as constituents of paints, varnishes, adhesives, and foams |
| polyurethanes | A synthetic resin in which the polymer units are linked by urethane groups, used chiefly as constituents of paints, varnishes, adhesives, and foams |
