Research of Effectiveness of Wood Fire Protection by Modified Epoxy Polymers

Abstract

Providing of fire protection for wood using modified epoxy compositions today is a prospective area of research. Modification of epoxy polymers is achieved by the introduction of fire retardants, dispersed mineral fillers and additives that regulate the properties of materials. The analysis of these components effect on the flammability of epoxy polymers, their flame-retardant, technological and operational properties is an important scientific and practical task. As research objects, compositions based on epoxy oligomer ED-20, hardened with an amine-type hardening agent, were used. To regulate the flammability and operating abilities of epoxy polymers, flame retardants, dispersed mineral fillers and additives, which differed by the nature of oxides, their quantitative ratio and by the particles shape, were used. To determine the flammability of the researched samples, was used the oxygen index method. The effectiveness of the flame-retardant effect of the developed material as wood coatings was determined by the method of weight loss. As a result of the research, it was established that improvement of the flame-retardant properties of epoxy polymers is associated with an increasing of their self-ignition temperature and depends from the properties of used additives. The effectiveness of the used additives of metal oxides of transient valence increases with decreasing basicity of these oxides. As a result of the research, it was established that, according to the effective-ness of fire protection, the developed fire retardant coating corresponds to the I group of fire retardant efficiency for wood, and the weight loss of the test sam-ples is on average 2.21%.