of UF polymer consists of [(O)CNHCH₂NH]_n repeat units. In contrast, melamine-formaldehyde resins feature NCH₂OCH₂N repeat units. Depending on the polymerization conditions, some branching can occur. Early stages in the reaction of formaldehyde and urea produce bis(hydroxymethyl)urea.

About 20 million metric tons of UF are produced annually.

Uses

Particle board, etc.

Over 70%

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