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Melamine resin or melamine formaldehyde (also shortened to melamine) is a resin with melamine rings terminated with multiple hydroxyl groups derived from formaldehyde. This thermosetting plastic material is made from melamine and formaldehyde. [1] In its butylated form, it is dissolved in n-butanol and xylene. It is then used to cross-link with ...
Because melamine resin is often used in food packaging and tableware, melamine at ppm level (1 part per million) in food and beverage has been reported due to migration from melamine-containing resins. [86] Small amounts of melamine have also been reported in foodstuff as a metabolite product of cyromazine, an insecticide used on animals and ...
1.1 animal-derived. 1.2 plant-derived. ... melamine formaldehyde (NBS name: amino resin) phenolic resin (NBS name: phenolic or bakelite type)
A resin is a solid or highly viscous liquid that can be converted into a polymer. [1] Resins may be biological or synthetic in origin, but are typically harvested from plants. Resins are mixtures of organic compounds, and predominantly terpenes. Well known resins include amber, hashish, frankincense, myrrh and the animal-derived resin, shellac.
Adding urea to MF resins has been shown to lower the amount of free formaldehyde below the legal limit and is often used for this purpose. [1] Another complication with MF resins is the low solubility of melamine in water. [16] Because of this and the free formaldehyde content, MF resins are not used as commonly in the field of wood modification.
Ion-exchange resins are used in water purification and catalysis of organic reactions. (See also AT-10 resin, melamine resin.) Certain ion-exchange resins are also used pharmaceutically as bile acid sequestrants, mainly as hypolipidemic agents, although they may be used for purposes other than lowering cholesterol.
The term resin was originally named for the secretion of oil from plants and animals, such as rosin and shellac. Resin accounts for approximately 40% - 100% of the total weight of the plastic. The basic properties of plastics are mainly determined by the nature of the resin, but additives also play an important role.
Resinous plant exudates (balsams, oleo gum resins, and natural oleoresins) and animal secretions (ambergris, castoreum, musk, and civet) are extracted with solvents such as methanol, ethanol, toluene, or acetone. Yields range from 50 to 95%. The products mainly consist of nonvolatile, resinous compounds.