Phenolic resins are a useful option in many different industries. We can use these resins for adhesives, electronics, coatings, and packaging, among other uses. A significant advantage of phenolic resins is that they have an inherent resistance to heat and are less likely to combust than other compounds. However, since we often use these resins in tandem with other materials, it can be a good idea to take measures to reduce the risk of flammability. Here are three things that make phenolic resins less flammable and how they can protect other materials.
Additive FRs
There are two primary types of fire retardants (FRs) that can help protect phenolic resins from fire. Additive FRs are materials that we add to the compound through physical mixing. Because they don’t bind directly to the resin, there’s less worry of any noticeable chemical reactions. Manufacturers can introduce an additive FR at virtually any state of the production process, making it easier to decide when to include them and giving the manufacturer much more control. One of the most commonly used additive materials to reduce flammability is triphenyl phosphate (TPP), which manufacturers must add while it’s in its gas phase.
Reactive FRs
Another thing that makes phenolic resins less flammable is reactive FRs. Unlike additives, reaction FRs bond directly to the compound and create a chemical reaction. After introducing a reacting FR, it creates a chemical bond and becomes a permanent part of the structure. Because of the chemical nature of reactive FRs, producers need to incorporate them during the earlier stages, making them slightly less versatile than additive FRs.
Epoxy Coating
Phenolic resins already have a naturally high resistance to fire, but sometimes an extra coating can protect them even further. There are many fire-retardant epoxy resins that can act as a layer and go on top of other phenolic resin materials. These coatings may utilize reacting FRs that boost protection from fire without forcing the phenolic resin to go through any chemical changes.
To learn more about phenolic resins and their practical applications, reach out to Capital Resin. We have decades of experience working with phenolic resins, resorcinol resins and other chemical compounds. Capital Resin can design, produce, and manufacture your chemicals so that you don’t have to. For more information or to get more details on the services we offer, don’t hesitate to contact us anytime; we’d be happy to assist you.
