Stabilization of polyether polyol, polyester polyol or...

C - Chemistry – Metallurgy – 08 – K

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C08K 5/13 (2006.01) C08K 5/34 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2570540

The present invention pertains to compositions comprising (a) a polyether polyol, a polyester polyol or a polyurethane, (b) a UV-absorber of formula (I) and/or a hindered amine light stabilizer of formula (II) wherein R1, and R2 are each independently C1-C4alkyl or C1-C4alkyoxy, and (c) at least one further UV-absorber and/or hindered amine light stabilizer if only one of the components (I) and (II) is present with the proviso that component (c) is not a compound of formula (A)-(D) as defined in claim 1.

La présente invention concerne des compositions comprenant (a) un polyéther polyol, un polyester polyol ou un polyuréthanne, (b) un absorbeur UV représenté par la formule générale (I) et/ou un photostabilisant à amines à empêchement représenté par la formule générale (II). Dans la formule générale (I), R1 et R2 désignent chacun un groupe alkyle C1-C4 ou alkyloxy C1-C4. Les compositions comprennent également (c) au moins un absorbeur UV et/ou un photostabilisant à amines à empêchement si une seule des deux composantes (I) et (II) est présente, à condition que la composante (c) ne soit pas un composé représenté par les formules générales (A)-(D) définies dans la revendication 1 de la présente demande.

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