Phenolic resin is also called the bakelite, also called bakelite powder. Originally colorless or brown transparent material, the market often add colorant and a red, yellow, black, green, brown, blue wait for color, particles, powder.
Weak acid and weak base resistance, meet acid decomposition, in strong alkali corrosion. Insoluble in water, but soluble in organic solvents such as acetone, alcohol. Phenol and formaldehyde polycondensation. It includes: linear phenolic resin, thermosetting phenolic resin and oil soluble phenolic resin. Mainly for the production of molding compound, plastic laminate; Manufacturing varnish or insulation, corrosion resistant coating; Manufacturing daily necessities, ornaments; Making sound insulation, heat insulation material and so on.
Common plastic handle high voltage electrical outlet, furniture and so on of epoxy-modified phenolic phenolic resin, PF, phenolic resin. As the yellow, transparent, amorphous block material, due to containing free molecules are reddish, specific gravity 1.25 ~ 1.30, soluble in alcohol, insoluble in water, the water, weak acid and weak base solution stability.
By phenol and formaldehyde in catalyst under the condition of polycondensation, via neutralization, water washing and made of resin. For selecting the different catalysts, can be divided into two categories, thermosetting and thermoplastic. Phenolic resin has good acidproof performance, mechanical properties, heat resistance, is widely applied in anti-corrosion engineering, adhesive and flame retardant materials, grinding wheel manufacturing and other industries. Phenol - formaldehyde resin was the first industrialized synthetic resin.
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