Patent ID: 7923074

Claim:
A method for preparing a vehicle interior material comprising the steps of: feeding 100 parts by weight of phosphorus and nitrogen-containing non-halogen flame retardant particles and 0.1 to 20 parts by weight of hydrophobic silica fine particles having hydrophobic groups which are hydrophobized by contacting dry silica with dimethyldichlorosilane and having an average particle size of 0.001 to 5 μm to a mixer equipped with a high-speed agitation means having a revolution capability of about 100 to 5,000 rpm, agitating and mixing the phosphorus and nitrogen-containing non-halogen flame retardant particles and the hydrophobic silica fine particles to produce the phosphorus and nitrogen-containing non-halogen flame retardant particles coated with the hydrophobic silica fine particles, mixing 100 parts by weight as solids of a synthetic resin emulsion and 1 to 300 parts by weight of the phosphorus and nitrogen-containing non-halogen flame retardant particles coated with the hydrophobic silica fine particles to produce a coating composition, coating the coating composition onto the vehicle interior material, and drying the coated vehicle interior material.