▎ 摘　　要

NOVELTY - A new type of environmentally safe fire-proof and heat-insulating expansion coating comprises 10-50 wt.% mixture of ethylene vinyl acetate (EVA) emulsion and polyvinyl alcohol or esteroxy-modified hydrocarbon polymer material, 2-35 wt.% ammonium polyphosphate, 0-70 wt.%silicon dioxide or yellow sand, 5-50 wt.% activated charcoal agent, 0-5 wt.% calcium carbonate powder, 0-3 wt.% cellulose or carboxymethyl base cellulose, 1-20 wt.% size control agent and 0-10 wt.%. inorganic coagulant. USE - Environmentally safe, fireproof, heat-insulating, expansion coating is used in combustible base material, used in steel and used in tunnels. ADVANTAGE - The new type environmentally safe, fire-proof and heat-insulating expansion coating has convenience and safety in construction. The simple and efficient one-step coating suitable for use in flammable substrates, enables customization of coating thickness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of new environmentally safe, fireproof, heat insulation expansion coating, which involves mixing ethylene vinyl acetate (EVA) emulsion with polyvinyl alcohol or ester modified hydrocarbon polymer material, ammonium polyphosphate, silicon dioxide or yellow sand, active carbon forming agent, calcium carbonate powder, cellulose or hydroxymethyl cellulose, size control agent and inorganic coagulant uniformly, for 5 - 20 minutes.