Patent ID: 8771561

Claim:
A composition which comprises a) an aminoguanidine phenylphosphinate salt of formula (I) wherein R 1 -R 5 independently of one another represent hydrogen or a substituent selected from the group consisting of C 1 -C 4 alkyl, hydroxy, hydroxy-C 1 -C 4 alkyl and C 1 -C 4 alkoxy; R 6 -R 10 independently of one another represent hydrogen or a substituent selected from the group consisting of C 1 -C 4 alkyl, phenyl, phenyl-C 1 -C 4 alkyl, (C 1 -C 4 alkyl) 1-3 phenyl and (C 1 -C 4 alkyl) 1-2 hydroxyphenyl; and x represents a number between 1.0 and 2.0; and b) a polymer substrate.