Patent ID: 6545073
Filing Date: 2003-04-08
Classification: C08K

Abstract:
A flame retardant composition comprising a flammable organic material selected from the group consisting of plastic resins, natural products and mixtures thereof having incorporated a flame retardant amount of:A) an organic phosphorus-phosphorus oxyacid compound produced by the process consisting of mixing, heating and reacting at ambient pressure the following components in stoichiometric proportion: a) organic phosphorus compound with a valence of 3-4 and selected from the group consisting of organic phosphonates, phosphites, phosphates, alkyl hydrogen phosphites, alkyl-aryl hydrogen phosphites, acid phosphates and mixtures thereof, in the amount of 25 to 100 parts by weight; b) inorganic phosphorus oxyacid which has a valence of 5 contains and selected from the group consisting of phosphoric acid, polyphosphoric acid, pyrophosphoric acid, triphosphoric acid, metaphosphoric acid, phosphorus oxide and mixtures thereof in the amount of 10 to 100 parts by weight; then add, mix and react c) basic salt forming compound, in the amount of 0 to 200 parts by weight; then add and mix B) a comb polymer consisting of polyethylene main chain and a polyoxyalkylene side chain, in the amount of 0 to 30 parts by weight; C) a metal containing compound having a carbonization accelerating effect, in the amount of 0 to 30 parts by weight; D) a carbonization auxiliaries selected from the group consisting of phosphorus, boron-phosphorus and boron containing compounds that produce acidic components in the pyrolysis mixture 0 to 100 parts by weight; E) a filler, in the amount of 0 to 400 parts by weight; the components A-E being 5 to 50% by weight, based on the weight of the flammable organic material.