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  2. Urea-formaldehyde - Wikipedia

    en.wikipedia.org/wiki/Urea-formaldehyde

    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.

  3. Bosch-Meiser process - Wikipedia

    en.wikipedia.org/wiki/Bosch-Meiser_process

    Urea plant using ammonium carbamate briquettes, Fixed Nitrogen Research Laboratory, ca. 1930 Carl Bosch, 1927. The Bosch–Meiser process is an industrial process, which was patented in 1922 [1] and named after its discoverers, the German chemists Carl Bosch and Wilhelm Meiser [2] for the large-scale manufacturing of urea, a valuable nitrogenous chemical.

  4. Methylene diurea - Wikipedia

    en.wikipedia.org/wiki/Methylene_diurea

    Upload file; Search. Search. Appearance. ... Download as PDF; Printable version; ... MDU is an intermediate in the production of urea-formaldehyde resins. [1]

  5. In situ polymerization - Wikipedia

    en.wikipedia.org/wiki/In_situ_polymerization

    In situ polymerization of such formaldehyde systems usually involves the emulsification of an oil-phase in water. Then, water-soluble urea/melamine formaldehyde resin monomers are added, which are allowed to disperse. The initiation step occurs when acid is added to lower the pH of the mixture.

  6. Impregnation resin - Wikipedia

    en.wikipedia.org/wiki/Impregnation_resin

    The basic reaction of urea and formaldehyde to create a urea-formaldehyde resin, followed by the condensation [12] Urea-formaldehyde resins (UF) are a class of impregnation resins for wood modification made by reacting urea with formaldehyde. This resin can be polymerized after impregnation into the wood substrate by oven-curing.

  7. Hydroxymethylation - Wikipedia

    en.wikipedia.org/wiki/Hydroxymethylation

    This pattern is illustrated by the use of formaldehyde in the production various polymers and resins from phenol-formaldehyde condensations (Bakelite, Novolak, and calixarenes). Similar crosslinking occurs in urea-formaldehyde resins. The hydroxymethylation of N-H and P-H bonds can often be reversed by base.

  8. Dimethylol ethylene urea - Wikipedia

    en.wikipedia.org/wiki/Dimethylol_ethylene_urea

    The production of DMEU is through the condensation of formaldehyde with ethylene urea: [9] 2CH 2 O + (C 2 H 4 N 2 H 2)CO → (C 2 H 2 N 2 (CH 2 OH) 2)CO. The reaction proceeds around 200 °C (392 °F) but this temperature can be brought down to around 70 °C (158 °F) in the presence of an acid catalyst. [10]

  9. Wood glue - Wikipedia

    en.wikipedia.org/wiki/Wood_glue

    The energy consumption and greenhouse gas emissions associated with the production of Urea-formaldehyde are lower than those of Phenol formaldehyde adhesives. But Urea-formaldehyde adhesive is judged to have a nearly 50% higher life cycle impact than Phenol formaldehyde mainly because of acid based emmissions during its production process. [15 ...

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