The present invention relates to a halogen-free flame retardant containing benzoxazine and a polymer material containing a halogen-free flame retardant. A small amount of metal oxide or hydrate may be added as a flame retardant synergist. Phosphorus oxide,phosphoric acid, metaphosphoric acid, polyphosphoric acid generated from combustion of red phosphorus reacts with a large number of phenolic hydroxyls generated in curing of benzoxazine resin, and the product is dehydrated to form a inorganic-organic hybridized blocking layer. The blocking layer has a good wettability on a base polymer, and t...
