Waterborne resin to enhance the fire resistance of plywood
A new work has focused on the thermal properties of an intumescent coating with waterborne melamine-acrylic emulsion resin for plywood.
A mixture of etherified melamine–formaldehyde and acrylic emulsion resin was designed, with the hybrid resin improving the fire retardancy of indoor plywood as well as the CO and CO2 emissions. The water-based hybrid resin exhibited a single curing peak; the need for solvents was reduced. Compared with pure etherified melamine–formaldehyde resin, the hybrid resin had better flame retardancy and produced less pollution.
Improved flame retardancy
Scanning electron microscopy and cone calorimetry were conducted, and the analyses revealed that lower binder resin concentrations resulted in improved flame retardancy and better char layer formation. When the binder resin concentrations were increased and CO/CO2 emissions were continued beyond 300 s, the flame retardancy of the intumescent coating was the same as that of the lower binding resin concentrations.
The study has been published in Journal of Coatings Technology and Research, Volume 20, Issue 4, July 2023.
Event tip
The latest trends, innovations and developments on fire retardant coatings will be discussed at the EC Conference Protective & Fire-retardant Coatings on October 18 -19 in Berlin, Germany. In addition to fire protection, the focus will also be on anti-corrosive coatings.
