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Urea-formaldehyde (UF), also known as urea-methanal, so named for its common synthesis pathway and overall structure, [1] is a nontransparent thermosetting resin or polymer. It is produced from urea and formaldehyde. These resins are used in adhesives, plywood, particle board, medium-density fibreboard (MDF), and molded objects.
In 1985 the first urea-formaldehyde resin production unit was commissioned. Four of the seven current ammonia plants at Tolyatti were constructed by Chemico. [12] During the 1980s, two urea processing plants were constructed with a combined production capacity of 480,000 tons per year.
The compound is formed by the condensation of formaldehyde with urea. ... MDU is an intermediate in the production of urea-formaldehyde resins. [1]
Formaldehyde is a common precursor to more complex compounds and materials. In approximate order of decreasing consumption, products generated from formaldehyde include urea formaldehyde resin, melamine resin, phenol formaldehyde resin, polyoxymethylene plastics, 1,4-butanediol, and methylene diphenyl diisocyanate. [40]
The structure of the molecule of urea is O=C(−NH 2) 2.The urea molecule is planar when in a solid crystal because of sp 2 hybridization of the N orbitals. [8] [9] It is non-planar with C 2 symmetry when in the gas phase [10] or in aqueous solution, [9] with C–N–H and H–N–H bond angles that are intermediate between the trigonal planar angle of 120° and the tetrahedral angle of 109.5°.
The development also included a factory for the production of aluminum powder and shiny and matte aluminum pastes with the latest international technology. The factory is considered the only one in Egypt and the Middle East. A factory for formaldehyde, resins and urea-formaldehyde was also established according to the latest international ...
Of all aldehydes, formaldehyde is produced on the largest scale, about 6 000 000 tons per year. It is mainly used in the production of resins when combined with urea, melamine, and phenol (e.g., Bakelite). It is a precursor to methylene diphenyl diisocyanate ("MDI"), a precursor to polyurethanes. [7]
It is the largest producer of Methanol and Formaldehyde in India with production capacity of 600TPD Methanol and 325TPD Formaldehyde. The company was incorporated in 1971 and by 1976 had started production at their small methanol plant located at Namrup along with formaldehyde and a few urea-formaldehyde resins like urea-formaldehyde glue and ...