Urea formaldehyde resin adhesive
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Urea-formaldehyde resin
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Urea formaldehyde resin adhesive
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Urea formaldehyde resin, also known as urea formaldehyde resin. The abbreviation UF refers to the condensation of urea and formaldehyde in the presence of a catalyst (alkaline or acidic) to form an initial urea formaldehyde resin, which is then treated with a curing agent or auxiliary agent to form an insoluble and non melting final thermosetting resin. [1] The cured urea formaldehyde resin is lighter in color than the phenolic resin, translucent, resistant to weak acids and alkalis, good in insulation, excellent in abrasion resistance, and cheap in price. It is the largest type of adhesive. Especially in the manufacturing of various Engineered wood in the wood processing industry, urea formaldehyde resin and its modified products account for about 90% of the total amount of adhesive. However, in case of strong acid and alkali, it is easy to decompose, has poor weather resistance, poor initial viscosity, large shrinkage, great brittleness, water resistance, and is easy to age. The Engineered wood produced with urea formaldehyde resin has the problem of formaldehyde release during manufacturing and use, so it must be modified.
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Characteristics: White transparent liquid with a specific gravity of 1.26. Soluble in water, ether, and ethanol. The chemical properties are very active and easy to aggregate into a white resin like solid.
Formaldehyde, chemical formula HCHO or CH ₂ O, formula 30.03, also known as formic aldehyde. Colorless gas with a special pungent odor, which has a stimulating effect on the eyes, nose, and other organs.
Formaldehyde, chemical formula HCHO or CH ₂ O, formula 30.03, also known as formic aldehyde. Colorless gas with a special pungent odor, which has a stimulating effect on the eyes, nose, and other organs.
Urea formaldehyde resin adhesive
Urea formaldehyde resin, also known as urea formaldehyde resin. The abbreviation UF refers to the condensation of urea and formaldehyde in the presence of a catalyst (alkaline or acidic) to form an initial urea formaldehyde resin, which is then treated with a curing agent or auxiliary agent to form an insoluble and non melting final thermosetting resin.
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