Composition for flame retardance of BMC (bulk molding compound) material, environment-friendly BMC flame-retardant material as well as preparation method and application thereof

The invention relates to the technical field of new materials, and provides a composition for flame retardance of a BMC (bulk molding compound) material, an environment-friendly BMC flame-retardant material as well as a preparation method and application of the environment-friendly BMC flame-retardant material, and the composition comprises ammonium phytate and humic acid with the particle size of 23 microns or less in a mass ratio of (4-12): (20-60). The BMC flame-retardant material is prepared from unsaturated polyester resin and the composition. The preparation method of the BMC flame-retardant material comprises the following steps: premixing the unsaturated polyester resin and all or part of humic acid, then adding the rest raw materials, mixing, and curing and molding at the temperature of 110 DEG C or below. By utilizing the composition, the application performances such as flame retardant property, mechanical property and low density of the BMC material can be considered, and the composition also conforms to the development trend of green and environment-friendly materials. Compared with an existing flame-retardant system of metal hydroxide for flame retardance of the BMC material, the flame-retardant system has remarkable technical advantages.