Phenolic resins, also known as phenol–formaldehyde resins, are synthetic polymers that are produced from the reaction of phenol or substituted phenol with for
The salient and versatile features of phenolic resins provide favorable comparisons between them and other thermosetting resins as well as thermoplastic product
Until the early 1920, only naturally occurring resins, such as congo kauri gums or shellac were used in the surface coating industry. Varnish makers combined th
The steel industry has had a long history of development, yet, despite all the time that has passed, it still demonstrates all the signs of longevity. The steel
Soaps are cleaning agents that are usually made by reacting alkali (e.g., sodium hydroxide) with naturally occurring fat or fatty acids. A soap is a salt of a c