New silicon compounds with sterically hindered linear amine...

Details New silicon compounds with sterically hindered linear amine... New silicon compounds with sterically hindered linear amine...

C - Chemistry, Metallurgy

08

G

C08G 77/388 (2006.01) C07C 215/08 (2006.01) C07F 7/08 (2006.01) C07F 7/21 (2006.01) C08L 83/08 (2006.01)

Patent

CA 2207109

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 R<1> 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>-CR<9>R<10>-NR<11>-R<12>, wherein R<8> may be an alkylen or alkenylen rest; R<9> and R<10> may represent alkyl rests; R<11> may be H or alkyl; and R<12> is a tertiary alkyl. The present invention also relates to the utilisation of said polyorganosiloxanes in polymers in order to improve particularly their photostabilization.

La présente invention concerne des polyorganosiloxanes linéaires, cycliques ou ramifiés ayant par molécule au moins trois motifs siloxyles dont au moins un motif fonctionnel de formule (I), où R1 représente un radical alkyle en C1 à C4 ou phényle, X renferme une fonction amine linéaire secondaire ou tertiaire, liée au silicium par une liaison -Si-A-C avec A étant un lien valentiel simple ou un atome d'oxygène. Ladite fonction amine linéaire peut être, quand A = lien valentiel, un radical de formule -R8-CR9R10-NR11-R12 où: R8 peut être un reste alkylène ou alkénylène; R9 et R10 peuvent être des restes alkyles; R11 peut être H ou alkyle; et R12 est un alkyle tertiaire. La présente invention concerne également l'utilisation de pareils polyorganosiloxanes dans les polymères pour améliorer notamment leur photostabilisation.

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