申请人:Hoechst Aktiengesellschaft
公开号:US04173601A1
公开(公告)日:1979-11-06
Carbamoyl-oxyalkyl-phosphinic acid derivatives or mixtures thereof of the formula ##STR1## in which Z.sub.n is an n-valent, saturated C.sub.1 -C.sub.6 -hydrocarbon group, R.sub.1 is an optionally branched C.sub.1 -C.sub.6 -alkyl group, which group may be substituted by a halogen atom, or a phenyl group, R.sub.2 is an optionally branched C.sub.2 -C.sub.7 -alkylene group, a is zero to n-1 and n is an integer of from 1 to 4. These compounds can be prepared by reacting phosphonites of the formula II ##STR2## in the presence of radical-forming agents, with a carbamate of the formula III CH.sub.2 .dbd.R.sub.3 --O--CO--NH.sub.2 III in which R.sub.3 is an optionally branched C.sub.2 -C.sub.7 -alkylene group and is identical with the radical R.sub.2 containing one hydrogen atom less. The compounds are used as flame-retardants for textiles.
Carbamoyl-oxyalkyl-phosphinic acid derivatives或其混合物的化学式为##STR1##其中Z.sub.n是n价饱和的C.sub.1-C.sub.6-烃基,R.sub.1是一个可选择的支链C.sub.1-C.sub.6-烷基基团,该基团可能被卤素原子或苯基取代,R.sub.2是一个可选择的支链C.sub.2-C.sub.7-烷基基团,a为0至n-1,n是1至4之间的整数。这些化合物可以通过在自由基形成剂存在下,将化学式II的膦酸酯与化学式III的氨基甲酸酯反应而制备得到。其中化学式II为##STR2##,化学式III为CH.sub.2.dbd.R.sub.3--O--CO--NH.sub.2,其中R.sub.3是一个可选择的支链C.sub.2-C.sub.7-烷基基团,并且与含有一个氢原子较少的基团R.sub.2相同。这些化合物被用作纺织品的阻燃剂。