Phenolic resin is also called bakelite, also known as bakelite powder. Originally a colorless or yellow-brown transparent material, the market often adds coloring agents and is red, yellow, black, green, brown, blue and other colors, and has particles and powders. Resistant to weak acids and weak bases, decomposes in the presence of strong acids, and corrodes in the presence of strong bases. Do not dissolve in water, soluble in organic solvents such as acetone and alcohol. Phenol and formaldehyde are obtained by polycondensation.
In 1872, the German chemist Bayer first synthesized phenolic resin. In 1907, the Belgian-American Baeklan proposed the phenolic resin heat curing method to realize the industrial production of phenolic resin. In 1910, Berlin, Germany, built the world's first synthetic phenolic resin factory. Created an era of human synthetic polymer compounds. A wide variety of phenolic resins can be produced due to the different types of phenols, aldehydes, catalysts, and molar ratios of phenol to aldehyde. These include: novolacs, thermosetting phenolic resins, and oil-soluble phenolic resins, water-soluble phenolic resins. . Mainly used in the production of compression molding powder, laminated plastic; manufacturing varnish or insulation, corrosion-resistant coatings; manufacturing of daily necessities, decorations; manufacturing sound insulation, insulation materials, wood-based panels, casting, refractory materials.
Phenolic resin, PF. phenolic resin, solid phenolic resin is yellow, transparent, amorphous bulk material, reddish color due to free phenol, specific gravity 1.25~1.30, soluble in alcohol, insoluble in water, water, weak acid The weak base solution is stable. A resin prepared by polycondensation of phenol and formaldehyde under catalyst conditions, neutralization, and water washing. Due to the choice of catalyst, it can be divided into thermosetting and thermoplastic. Phenolic resin has good acid resistance, mechanical properties and heat resistance, and is widely used in anti-corrosion engineering, adhesives, flame retardant materials, grinding wheel manufacturing and other industries.
