21. It is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. 22. For thermosetting plastics that require only one monomer, the monomer compound is the " resin ". 23. You've got urethanes, sheet-molding compound and any of several thermosetting plastics to match. 24. While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available. 25. When heated in the presence of acids, furfural irreversibly solidifies, i . e . a thermosetting polymer. 26. "' Duroplast "'is a composite thermosetting plastic, a close relative of formica and bakelite. 27. Like its predecessor the MP-444, the 445 features a frame made from super strong thermosetting plastic material. 28. Polyurethane is a thermosetting plastic with no solvents, with a three-dimensionally linked molecular structure giving it mechanical stability. 29. One consequence of this is that typical polyurethanes do not soften or melt when they are heated; they are thermosetting polymers. 30. In 1943, the thermosetting phenolic resin was even considered for the manufacture of coins, due to a shortage of traditional material.
