▎ 摘　　要

NOVELTY - Fireproof coating comprises a bottom layer and a surface layer. The bottom layer is a non-expansion type fireproof coating using ethylene-vinyl acetate (EVA) redispersible rubber powder as an auxiliary agent. The surface layer is an expansion type fireproof coating formed by introducing nano graphene into the nitrogen-carbon-phosphorus system. USE - The coating is useful for improving the fireproof performance of the metal structure, preferably high-rise building steel structure (claimed). ADVANTAGE - The coating: has good bonding force, non-expansion type and expansion type composition use; reduces the structure load; provides a new way for the high-rise building steel structure fireproof protection refractory time 4 hours; has high bonding strength, good fireproof performance, convenient construction and is environmentally friendly.