| abstract |
The present invention relates to linear, cyclic or branched polyorganosiloxanes having, per molecule, at least three siloxyl patterns, of which at least one is a function pattern having the formula (I), wherein R1 is a phenyl C1-C4 alkyl radical, X contains a secondary or tertiary linear amine function linked to the silicon by a bond -Si-A-C, with A being a simple valence link or an oxygen atom. Said linear amine function may be, when A = valency link, a radical having the formula -R?8-CR9R10-NR11-R12¿, wherein R8 may be an alkylen or alkenylen rest; R?9 and R10¿ may represent alkyl rests; R11 may be H or alkyl; and R12 is a tertiary alkyl. The present invention also relates to the utilisation of said polyorganosiloxanes in polymers in order to improve particularly their photostabilization. |