Urea-formaldehyde, also known as urea-methanal, so named for its common synthesis pathway and overall structure, is a non-transparent thermosetting resin or plastic, made from urea and formaldehyde heated in the presence of a base.These resins are used in adhesives, finishes, particle board, MDF, and molded objects.
Formaldehyde is found in many products such as particle board, plywood, paneling, pressed-wood products and urea formaldehyde foam insulation. Some synthetic fabrics, especially permanent press, shampoos and cosmetics may also contain small amounts.  From Wikipedia, the free encyclopedia. Urea-formaldehyde, also known as urea-methanal, so named for its common synthesis pathway and overall structure, is a non-transparent thermosetting resin or plastic, made from urea and formaldehyde heated in the presence of a base. These resins are used in adhesives, finishes, particle board, MDF, and molded objects. Urea-formaldehyde foam insulation (UFFI) dates to the 1930s and made a synthetic insulation with R-values near 5.0 per inch. It is basically a foam, like shaving cream, that is easily injected into walls with a hose. Formaldehyde is naturally produced in small amounts in our bodies. It is used in the production of fertilizer, paper, plywood, and urea-formaldehyde resins. It is also used as a preservative in some foods and in many products used around the house, such as antiseptics, medicines, and cosmetics.  Urea is widely used in fertilizers as a source of nitrogen and is an important raw material for the chemical industry. Friedrich Woehler 'wöhler s discovery in 1828 that urea can be produced from inorganic starting materials was an important conceptual milestone in. chemistry Urea or carbamide is an organic compound with the chemical formula C O (N H 2) 2. Urea formaldehyde foam insulation is injected as a mixture of urea formaldehyde resin, an acidic foaming agent, and a propellant, such as air. It was commonly used in existing houses by injecting the foam into areas, such as behind walls, where it was impractical to provide conventional insulation. UFFI is still used in Europe, where it was never banned and is considered one of the better “retrofit” insulations. In the United States, the Consumer Product Safety Commission banned the sale of UFFI in the United States in 1982, and shortly thereafter a law prohibiting the sale of urea formaldehyde was enacted. Its primary use is in the production of resins and as a chemical intermediate. Urea-formaldehyde (UF) and phenol formaldehyde (PF) resins are used in foam insulations, as adhesives in the production of particle board and plywood, and in the treating of textiles. Urea-formaldehyde resin's attributes include high tensile strength, flexural modulus, and a high heat distortion temperature, low water absorption, mould shrinkage, high surface hardness, elongation at break, and volume resistance. Index of Refraction = 1.54. Urea-formaldehyde foam insulation (UFFI) dates to the 1930s and made a synthetic insulation with R-values near 5.0 per inch. It is basically a foam, like shaving cream, that is easily injected into walls with a hose.
http://www.health.state.mn.us/divs/eh/indoorair/voc/formaldehyde.htm https://en.wikipedia.org/wiki/Urea-formaldehyde http://www.atsdr.cdc.gov/substances/toxsubstance.asp?toxid=39 https://en.wikipedia.org/wiki/Urea http://www.carsondunlop.com/resources/articles/urea-formaldehyde-foam-insulation/ https://www.osha.gov/SLTC/formaldehyde/ https://en.wikipedia.org/wiki/Urea-formaldehyde
what is urea formaldehyde