What is the difference between resol and novolac?
Novolac and resole are the products of phenol and formaldehyde, and are known as phenolic resins. The differences between novolac and resole are as follows: Novolac is produced using excess phenol and an acid or metal salt catalyst, whereas resole is produced using excess formaldehyde and a basic catalyst.
What is a resol resin?
Resol resins are thermosetting polymers which cure adequately without addition of any catalyst other than heat. They are mainly used for gluing and bonding building materials. They are widely used in applications such as molding compounds, wood working adhesives and insulation among others.
Is resol a thermosetting plastic?
Phenolic Novolac And Resol Resins – Phenolic thermosetting resin. Phenolic thermosetting resin products are some of the most adaptive materials in the marketplace and hundreds of industries benefit from their use.
Is phenolic resin fire resistance?
“Being intrinsically fire-resistant, phenolic resins offer a better safety margin without the need for flame- retardant additives or gel coats,” says Pisipati. “This allows them to be used for even fine weave cloths for thin parts.
What are the properties of Bakelite?
Bakelite has a number of important properties. It can be molded very quickly, decreasing production time. Moldings are smooth, retain their shape and are resistant to heat, scratches, and destructive solvents. It is also resistant to electricity, and prized for its low conductivity.
What are the properties of Phenol formaldehyde?
Properties of Phenolic Resins In addition, phenol formaldehyde resin properties include good thermal insulation, low density and excellent durability. They are easy to mold into a variety of shapes and complex contours, making them adaptable to custom equipment or environments.
What is difference between novolac and Bakelite?
A linear product of Phenol formaldehyde polymer is Novolac used in paints. Novolac on heating with formaldehyde undergoes cross linking to form an infusible solid mass called bakelite. It is used for making combs phonograph records electrical switches and handles of various utensils.
Where does phenolic resin come from?
phenol-formaldehyde resin, also called phenolic resin, any of a number of synthetic resins made by reacting phenol (an aromatic alcohol derived from benzene) with formaldehyde (a reactive gas derived from methane). Phenol-formaldehyde resins were the first completely synthetic polymers to be commercialized.