Graphene expansion-type low smoke fire retardant coating and preparation method thereof

The invention relates to a graphene expansion-type low smoke fire retardant coating and a preparation method thereof, and belongs to the domain of a functional coating. The graphene expansion-type low smoke fire retardant coating is characterized by mixing and grinding the following substances in parts by weight: 100 parts of an aqueous film-forming substrate, 200-250 parts of expansion-type fire retardant, 20-30 parts of titanium dioxide, 0.1-1 part of grapheme substance, 1-2 parts of assistants and 200-250 parts of water The graphene expansion-type low smoke fire retardant coating has the beneficial effects that the graphene expansion-type low smoke fire retardant coating is even and compact to foam at the early combustion stage, a fire and heat-insulating coated carbon layer structure is formed at the later period, the graphene expansion-type low smoke fire retardant coating is long in fire resistant time, large in mechanical strength, and good in water and weather resistance, the coating is smooth in surface, and the preparation technology is simple in flow and convenient to operate. The fire retardant coating belongs to the domain of a waterborne coating, is low in smoke and toxicity, and belongs to an environment-friendly coating. The coating can be widely applied to the fields such as timberwork, a steel structure and fiber fabric.