US 12,391,838 B2
Synergistic flame retardant compositions and fiber blends including the same
Ramaswamy Nagarajan, Westford, MA (US); Jayant Kumar, Westford, MA (US); Ravi Mosurkal, Lowell, MA (US); Zhiyu Xia, Shrewsbury, MA (US); Shiran Yu, Lowell, MA (US); and Weeradech Kiratitanavit, Boston, MA (US)
Assigned to US GOVERNMENT AS REPRESENTED BY THE SECRETARY OF THE ARMY, Natick, MA (US); and THE UNIVERSITY OF MASSACHUSETTS, Boston, MA (US)
Filed by THE UNIVERSITY OF MASSACHUSETTS, Boston, MA (US); and The Government of the United States, As Represented By The Secretary of The Army, Natick, MA (US)
Filed on Aug. 16, 2019, as Appl. No. 16/543,218.
Claims priority of provisional application 62/719,581, filed on Aug. 17, 2018.
Prior Publication US 2020/0056057 A1, Feb. 20, 2020
Int. Cl. C09D 5/18 (2006.01); D06M 13/148 (2006.01); D06M 13/282 (2006.01)
CPC C09D 5/18 (2013.01) [D06M 13/148 (2013.01); D06M 13/282 (2013.01); D06M 2200/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A flame resistant textile, comprising:
a fiber blend comprising a natural fiber and a synthetic fiber,
wherein the natural fiber comprises cotton, and
wherein the synthetic fiber comprises nylon;
a synergistic flame retardant composition comprising:
a phenolic compound comprising proanthocyanidin tannic acid;
a phosphorus-containing compound comprising phytic acid; and
a surfactant,
wherein the synergistic flame retardant composition is present in an amount of 0.1 weight percent to about 8 weight percent, based on a total weight of the flame resistant textile, and
wherein the flame resistant textile has:
a heat release capacity of less than or equal to 230 joules per gram-Kelvin, as determined by pyrolysis combustion flow calorimetry,
a total heat release of less than or equal to 11 kilojoules per gram, as determined by pyrolysis combustion flow calorimetry,
a peak heat release rate of less than or equal to 120 kilowatts per square meter, as determined by cone calorimetry,
a total heat release rate of less than or equal to 3.5 megajoules per square meter, as determined by cone calorimetry, or
a combination thereof.