Urea-formaldehyde, also known as urea-methanal, so named for its common
synthesis pathway and overall structure, is a non-transparent thermosetting
resin or polymer. It is produced from urea and formaldehyde. These resins are
used in adhesives, finishes, particle board, MDF, and molded objects. UF and
related amino resins are a class of thermosetting resins of which
urea-formaldehyde resins make up 80% produced globally. Examples of amino resins
use include in automobile tires to improve the bonding of rubber to tire cord,
in paper for improving tear strength, in molding electrical devices, jar caps,
Agricultural use of Urea-formaldehyde
Urea formaldehyde is also used in agriculture as a controlled release source of nitrogen fertilizer. Urea formaldehyde’s rate of decomposition into CO2and NH3 is determined by the action of microbes found naturally in most soils. The activity of these microbes, and, therefore, the rate of nitrogen release, is temperature dependent. The optimum temperature for microbe activity is approximately 70-90 °F (approx 20-30 °C).
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