Patent ID: 7220791

Claim:
A styrene-hypophosphite adduct of the formula (I) {R 9 [C(Ph(R 1 , R 2 , R 3 , R 4 , R 5 ))R 6 —CR 7 R 8 ] n } m P(O)(O 1 /x M x+ ) where R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are identical or different and are hydrogen methyl, ethyl, n-propyl, n-butyl, n-pentyl; isopropyl, isobutyl, tert-butyl, neopentyl; phenyl; hydroxy, methoxy, ethoxy, propoxy, butoxy, phenoxy; amino, methylamino, ethylamino, propylamino, butylamino, N,N-dimethylamino, diethylamino, dipropylamino, or dibutylamino, and n is from 1 to 10, R 9 is H or a free-radical initiator radical, M x+ is Li, K, Mg, Ca, Sr, Ba, Al, Ge, Sn, Bi, Sb, Pb, Ti, TiO, Zr, ZrO, Zn, Fe, Ce, Mn having the valence x, m=2, and n=from 1 to 100, and is the number of styrene units C(Ph(R 1 , R 2 , R 3 , R 4 , R 5 ))R 6 —CR 7 R 8 inserted into the P—H bond, said adduct being in the form of a salt.