Patent ID: 7087666

Claim:
A composition comprising a surface-modified phosphinic salt selected from the group consisting of formula (I), a surface-modified diphosphinic salt of the formula (II), mixtures of formula (I) and formula (II), polymers of formula (I), polymers of formula (II), mixtures of polymers of formula (I) and (II), and mixtures thereof, where R 1 and R 2 are identical or different and are C 1 –C 6 -alkyl, linear or branched, or aryl; R 3 is C 1 –C 10 -alkylene, linear or branched, C 8 –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, or a protonated nitrogen base; m is from 1 to 4; n is from 1 to 4; x is from 1 to 4, wherein the phosphinic salt and/or diphosphinic salt, or their polymers, have been encapsulated with a surface layer composed of a synthetic resin or a wax.