Patent ID: 7713891

Claim:
A flame resistant fabric, said flame resistant fabric comprising: a fabric substrate, wherein said fabric substrate has cellulosic fibers and synthetic fibers, said cellulosic fibers being present in an amount from about 50% to about 100% of the weight of said fabric and said synthetic fibers being present in an amount from about 0% to about 50% of the weight of said fabric; and a finish applied to said fabric substrate, wherein said finish comprises a tetramethylhydroxy phosphonium salt or its condensate, urea, and a cationic softening agent; such that, when said fabric substrate to which said finish has been applied has been heat-cured and oxidized at least said cellulosic fibers have a pentavalent phosphate compound polymerized therein, said pentavalent phosphate compound including amide linking groups.