Antimony free brominated flame retardant system for textiles
The present invention teaches an antimony free brominated flame retardant composition, comprising a brominated flame retardant, an organic phosphorus-containing flame retardant which is an organic phosphate that is either an amorphous solid or a liquid, and a flame retardant which is a source of nitrogen and inorganic phosphorus, this source being amorphous compound. The invention further teaches textile coating formulations comprising these compositions, a process for applying them on textile fabrics, and the flame retarded fabrics coated by these compositions and formulations.
1. A textile flame retarded by a flame retardant composition, comprising:
a. a brominated flame retardant, wherein said brominated flame retardant is selected from the group consisting of an aromatic brominated polymer, 2,2′[(1-methylethylidene) -bis-[(2,6-dibromo-4,1-phenylene)-oxymethylene]]-bisoxirane polymer with 2,2′,6,6′-tetrabromo-4,4′-isopropylidenediphenol and 2,4,6-tribromophenol (FR4002), tetrabromobisphenol A diglycidyl ether copolymer (FR4001), tetrabromobisphenol A bis-(2,3-dibromopropyl ether) (FR9001), decabromodiphenyl ethane (FR1410), and ethylene-bis-tetra-ibromo-phthalimide (BT-93),
b. an organic phosphorus-containing flame retardant, said organic phosphorus-containing flame retardant being an organic phosphate that is either an amorphous solid or a liquid at room temperature,
c. a flame retardant which is a source of nitrogen and inorganic phosphorus, said source being an amorphous inorganic phosphate salt, wherein said inorganic phosphate salt is Aluminum Ammonium superphosphate;
wherein the textile is antimony-free and has bromine content in the range from 4% to 22% of the total weight of the textile, passing ASTM D6413 flammability test.
2. The antimony-free textile of claim 1 , wherein said organic phosphate is selected from the group comprising of Resorcinol-bis(diphenylphosphate), Tris (2-chloroisopropyl) phosphate, 2-Ethylhexyl Diphenyl Phosphate, and Butylated triphenyl phosphate ester.
3. The antimony-free textile of claim 1 wherein said brominated flame retardant ranges from 35% to 90% of the total weight of said flame retardant composition.
4. The antimony-free textile of claim 1 wherein said organic phosphate ranges from 15% to 50% of the total weight of said flame retardant composition.
5. The antimony-free textile of claim 1 wherein said source of nitrogen and inorganic phosphorus ranges from 10% to 30% of the total weight of said flame retardant composition.
6. A durable antimony-free, flame retarded textile according to claim 1 .
7. The antimony-free textile of claim 6 , wherein said textile is a fabric selected from nylon, cotton, polyester, and combinations thereof.
8. A method of making the antimony-free textile of claim 1 , the method comprising applying the flame retardant formulation onto a flammable textile fabric including:
a. contacting the flammable textile fabric with the flame retardant formulation; and
b. heating said flammable textile fabric to obtain the antimony-free textile.
9. The process of claim 8 , wherein said heating is conducted at between 140° C. and 180° C.
10. The process of claim 8 , wherein said contacting is effected by exhaustion, spreading, coating, padding, dipping, printing, foaming and/or spraying.
11. The antimony-free textile of claim 1 , wherein the bromine atoms in the brominated flame retardant are exclusively aromatically-bound, the organic phosphate is Resorcinol-bis(diphenylphosphate), and the bromine content in the range from 4% to 15% of the total weight of the textile.
12. The antimony-free textile of claim 11 , wherein the textile is cotton polyester fabric, and the bromine content of the textile is from about 10 to about 15% of the total weight of the textile.
13. The antimony-free textile of claim 11 , wherein the textile is cotton nylon fabric, and the bromine content of the textile is about 10% of the total weight of the textile.