Thermolysis of Intumescent Fire-Protective Compositions Comprising Silane-Terminated Polymers

Abstract— The effects of components of intumescent systems based on silane-terminated polyether (STP) polymers on their thermolysis character were studied. Thermal analysis and fire-resistance tests showed that neither the molecular weight of the STP polymer, nor a moderate change in the ratio of components in the intumescent system relative to the selected base composition, has a significant effect on the thermolysis, whereas a change in the amounts of fillers such as kaolin and, in particular, titania, provides doubling of the fireproof rating of the studied coatings due to the structuring of the char foam formed upon thermal destruction and acts as a heat-insulating coating. These results may be of significant importance in the development of heat-expanding fire-protection compositions based on STP polymers.