The influence of ceramic additives on intumescence and thermal activity of epoxy coatings for steel

• Published in: Journal of applied polymer science Vol. 138; no. 9
• Main Authors: Mastalska‐Popławska, Joanna, Kadac, Kornelia, Izak, Piotr, Gierej, Marcin, Stempkowska, Agata, Góral, Zuzanna
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 05-03-2021; Wiley Subscription Services, Inc
• Subjects: Additives; Ceramic coatings; coatings; Decomposition reactions; Epoxy coatings; Epoxy resins; Fatigue tests; flame retardance; Flame retardants; Graphite; Kaolin; Materials science; Polymers; Protective coatings; Protective structures; resins; swelling; thermal properties; Thermodynamic properties; Titanium oxides
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.49914

The article presents results of the research on the influence of graphite/kaolin and graphite/titanium oxide systems on thermal properties, intumescence degree and the integrity of the structure of intumescent protective films based on epoxy resins for steel. The TG/DTG/DSC analysis showed that graphite/kaolin system shifted the decomposition reaction of epoxy resin towards higher temperatures, even by about 30°C. Fire endurance tests and the SEM analysis confirmed these results because more thermally resistant (T500°C reached after 37.5 min for 1.1 coating thickness), swollen (about 20 times) and homogeneous coatings were obtained. The presented results suggest that ceramic fire retardants can successfully cooperate with organic components in intumescent protective coatings for steel elements.