Novel quaternary ureidomethyl phosphonium salts having the general formula ##STR1## are prepared by condensing a urea having the formula RNHC(O)NR'R" with a quaternary hydroxymethyl phosphonium salt having the formula (HOCH.sub.2).sub.4 P.sup.+ X.sup.- in a molar ratio of at least 2:1. The products, which are characterized by the absence of residual hydroxymethyl groups, are useful as finishing agents for imparting flame retardant properties to cotton fabrics.
具有一般式## STR1 ##的新型四元
脲甲基
磷酸铵盐是通过将具有公式RNHC(O)NR'R"的
脲与具有公式(HOCH.sub.2).sub.4 P.sup.+ X.sup.-的四元羟甲基
磷酸铵盐以至少2:1的摩尔比缩合而制备的。这些产品的特点是缺乏残留的羟甲基基团,可用作给棉织物赋予阻燃性能的整理剂。