The fire resistance and flame retardancy grade of the acrylic solid surface can be achieved through formula adjustment and usually needs to meet the UL94 V-0 or GB 8624 B1 grade standard. Specifically, it can be improved through the following ways:
Flame retardant selection: The fire resistance rating of the solid surface of acrylic needs to be enhanced by adding flame retardants, such as using phosphorus/nitrogen-containing flame retardants. However, it should be noted that phosphorus/nitrogen flame retardants may affect the water resistance of the coating film and need to be compensated by crosslinking agents (such as aziridine).
Formula optimization: The formula needs to be optimized through orthogonal tests to avoid a sharp increase in viscosity or film-forming defects caused by excessive flame retardants. Meanwhile, flame retardants need surface modification treatment (such as silane coating) to prevent delamination due to poor compatibility with emulsions.
Special material compounding: Introducing materials such as graphene oxide into the formula can enhance the fire resistance and flame retardancy. Graphene oxide has the functions of molecular chain cross-linking and inducing crystallization. At the same time, it is an excellent smoke suppressant. Its special molecular structure has barrier properties against all gas molecules, smoke and solid particles.