Wood flame retardants (d) and / or (e) in the gas phase have the advantage that they reduce the tendency to ignite and help the flame extinguishing of textile fiber-forming polymers. This is because once the volatile products or fuel produced by thermal degradation oxidize with oxygen in the flame, their chemical properties become very similar. Therefore, two methods, such as severing oxygen ((e) method) or generating interfering free radicals ((f) method), can undoubtedly guarantee the effect of the flame retardant. In terms of cost and benefit, antimony-halogen flame retardants are the most successful flame retardants in the field of bulk polymers and back-coated textiles. Unlike phosphorus- and nitrogen-containing fiber-reactive durable flame retardants for cellulosic fibers (see below), they are often used as backcoating agents only with the aid of resin binders. For textiles, most antimony-halogen systems consist of antimony trioxide and bromine-containing organic molecules such as decabromobiphenyl oxide (DBDPO) or hexabromocyclotridecane (HBCD). Upon heating, these substances release HBr groups and Br. base. These two will interfere with the chemical reaction of the flame according to the following diagram. In the diagram: R, CH2, H and OH groups are part of the flame oxidation chain reaction, which consumes fuel (RCH3) and oxygen.