| abstract |
The invention relates to surface-modified phosphinic salts of the formula (I) and/or diphosphinic salts of the formula (II) and/or polymers of these, n nwheren R 1 and R 2 are identical or different and are C 1 –C 6 -alkyl, linear or branched, and/or aryl; R 3 is C 1 –C 10 -alkylene, linear or branched, C 6 –C 10 -arylene, -alkylarylene, or -arylalkylene; M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K, and/or a protonated nitrogen base; m is from 1 to 4; n is from 1 to 4; x is from 1 to 4,n nwherein the phosphinic salts and/or diphosphinic salts, or their polymers, have been encapsulated with a surface layer composed of a synthetic resin or a wax, and to a process for their preparation, and to their use as flame retardants for thermoplastic and thermoset polymers. |