Apr 23, 2017 · The added functionality of the phenolic resin increases the ability for the resin to crosslink, creating a stronger polymer with high resistivities. A common type of epoxy phenolic resin is epoxy phenol novolac, in which the phenolic resin is a phenolic novolac resin, consisting of short polymers between 10-20 repeating units.
Base-catalysed phenol-formaldehyde resins are made with a formaldehyde to phenol ratio of greater than one (usually around 1.5). These resins are called resoles. Phenol, formaldehyde, water and catalyst are mixed in the desired amount, depending on the resin to be formed, and are then heated.
4.4 Polybenzoxazine-Epoxy-Phenolic/MWNT Nanocomposites. Rimdusit and Ishida reported a polybenzoxazine copolymer based on epoxy and phenolic resins . The epoxy resin served as a reactive diluent to reduce the viscosity of the mixture and provided a higher cross-link density, which led to improve thermal stability.
Hexion offers one of the industry’s broadest lines of epoxy curing agents, including phenolic resins, to satisfy a range of performance needs. Friction Materials Bakelite phenolic resins, because of their high heat properties, are used in friction applications for the automotive and rail industries.