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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 ...
Melamine also is used in the fabrication of melamine polysulfonate, used as a superplasticizer for making high-resistance concrete. Sulfonated melamine formaldehyde (SMF) is a polymer used as a cement admixture to reduce the water content in concrete while increasing the fluidity and the workability of the mix during handling and pouring.
Melamine boards range in quality primarily because of the amount of resin deposited on the base material. Some melamine boards remain clean (no ghosting) for a long time, others less so. Generally, this least expensive type of whiteboard is most commonly found in use in non-institutional applications. They are available in any office supply ...
Urea-formaldehyde resin condensates Cured melamine resin structure Furan resin prepolymers made from furfuryl alcohol , or by modification of furfural with phenol , formaldehyde ( methanal ), urea or other extenders, are similar to amino and phenolic thermosetting resins in that cure involves polycondensation and release of water as well as heat.
Melamine resin used on worktop surfaces [18] and some plastic dishes. [19] Diallyl-phthalate (DAP) used in high temperature and mil-spec electrical connectors and other components. Usually glass filled. Epoxy novolac resins used for printed circuit boards, electrical encapsulation, adhesives and coatings for metal.
Two steps in formation of urea-formaldehyde resin, which is widely used in the production of particle board. When condensed with phenol, urea, or melamine, formaldehyde produces, respectively, hard thermoset phenol formaldehyde resin, urea formaldehyde resin, and melamine resin. These polymers are permanent adhesives used in plywood and carpeting.
The most widely used method to saturate wood with impregnation resins is by a vacuum treatment process. [23] This process uses a sealable vessel to contain the wooden samples while they are in treatment. After the samples have been oven-dried and placed into the vessel, a vacuum is pulled up to a certain psi depending on the procedure.
Hazardous chemicals present physical and/or health threats to workers in clinical, industrial, and academic laboratories. Laboratory chemicals include cancer-causing agents (carcinogens), toxins (e.g., those affecting the liver, kidney, and nervous system), irritants, corrosives, sensitizers, as well as agents that act on the blood system or damage the lungs, skin, eyes, or mucous membranes.