How does the inclusion of aluminum trihydrate in resin composites improve fire retardancy?
The inclusion of aluminum trihydrate (ATH) in resin composites significantly enhances fire retardancy through multiple mechanisms. When exposed to heat, ATH decomposes endothermically, releasing water vapor that cools the material and dilutes flammable gases. Simultaneously, it forms a protective aluminum oxide char layer, which acts as a barrier to oxygen and heat, slowing combustion. This dual action makes ATH an effective, non-toxic flame retardant for polymers, widely used in construction, electronics, and automotive industries to meet safety standards. Its high loading capacity and compatibility with resins further ensure optimal performance without compromising mechanical properties.
