Patent ID: 8349925

Claim:
A blend comprising a synergistic mixture of (A) and (B), wherein: (A) is a chemical compound or a mixture of two or more chemical compounds selected from the group consisting of a) one or more phosphonate compound(s) according to the following formula wherein A 1 and A 2 are each independently of the other a substituted or unsubstituted straight chain or branched chain alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted benzyl, a substituted or unsubstituted phenyl, or a substituted or unsubstituted naphthyl, and b) alkyl- or aryl-phosphonic acids, wherein alkyl- is a straight chain or branched chain alkyl group having 1 to 4 carbon atoms, and aryl is a substituted or unsubstituted benzyl, substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, or a salt respectively an ester of the aforesaid phosphonic acid, and (B) is a 1,3,5-triazine compound or a mixture of two or more 1,3,5-triazine compounds selected from the group consisting of hindered amine compounds of the formula I, II, IIA and III: R 1 NH—CH 2 CH 2 CH 2 NR 2 CH 2 CH 2 NR 2 CH 2 CH 2 CH 2 NHR 4 (I) T-E 1 -T 1 (II) T-E 1 (IIA) G-E 1 -G 1 -E 1 -G 2 (III), where in the tetraamine of formula I R 1 and R 2 are the s-triazine moiety E; and one of R 3 and R 4 is the s-triazine moiety E, with the other of R 3 and R 4 being hydrogen, wherein E is R is methyl, cyclohexyl or octyl, R 5 is alkyl of 1 to 12 carbon atoms, wherein in the compound of formula II or IIA, when R is cyclohexyl or octyl, T and T 1 are each a tetraamine substituted by R 1 -R 4 as defined for formula I, where (1) one of the s-triazine moieties E in each tetraamine is replaced by the group E 1 which forms a bridge between two tetraamines T and T 1 ; car (2) the group E 1 can have both termini in the same tetraamine T as in formula IIA where two of the E moieties of the tetraamine are replaced by one E 1 group, or (3) all three s-triazine substituents of tetraamine T can be E 1 such that one E 1 links T and T 1 and a second E 1 has both termini in tetraamine T, and E 1 is and L denotes propanediyl, cyclohexanediyl or octanediyl; G, G 1 , and G 2 are each tetraamines substituted by R 1 -R 4 as defined for Formula J, except that G and G 2 each have one of the s-triazine moieties E replaced by E 1 , and G 1 has two of the triazine moieties E replaced by E 1 , such that there is a bridge between G and G 1 and a second bridge between G 1 and G 2 .