Patent ID: 8177859

Claim:
A method of permanently flameproofing cellulose fibres or an article containing said cellulose fibres, comprising: a) swelling said cellulose fibres in lye; b) removing said lye; c) subsequent to steb b) treating the moist cellulose fibres with a cyanuric chloride derivative in aqueous-alkaline phase, wherein said cyanuric chloride derivative is a compound of the general formula (I) wherein: R 1 is selected from the group consisting of: Cl; OX; SO 3 X; SO 2 X; OSO 3 X; OSO 2 X; OPO 3 X; OPO 2 X; NH 2 —(CH 2 ) n —COOH (n=1-3); NH—(CH 2 ) n —OH (n=1-3); N(—(CH 2 ) n —OH) 2 , (n=1-3); and wherein X is selected from the group consisting of: H + ; Li + ; Na + ; K + ; ½Mg ++ ; and ½Ca ++ ; and R 2 is selected from the group consisting of: OX; SO 3 X; SO 2 X; OSO 3 X; OSO 2 X; OPO 3 X; OPO 2 X; NH 2 —(CH 2 ) n —COOH (n=1-3); NH—(CH 2 ) n —OH (n=1-3); N(—(CH 2 ) n —OH) 2 , (n=1-3); and wherein X is selected from the group consisting of: H + ; Li + ; Na + ; K + ; ½Mg ++ ; and ½Ca ++ wherein said cyanuric chloride derivative is used in an amount sufficient to produce a subsequent nitrogen content of at least 2 to 8 wt. %, based on the flameproofed cellulose.