Patent ID: 7442430
Filing Date: 2008-10-28
Classification: B32B,C08K,Y10T

Abstract:
1. Multi-layered product comprising a first layer (A) having a thickness of 1 μm to 2 mm consisting essentially of (co)polyalkyl (meth)acrylate and 0.01 to 20 percent relative to the weight of said first layer of a UV stabilizer and a second layer (B) that contains polycarbonate, said stabilizer conforming to formula (I) wherein X denotes OR 1 ; OCH 2 CH 2 OR 1 ; OCH 2 CH(OH)CH 2 OR 1 or OCH(R 2 )COOR 3 , R 1 is branched or unbranched C 1 -C 13 alkyl, C 2 -C 20 alkenyl, C 6 -C 12 aryl or —CO—C 1 -C 18 alkyl, R 2 is H or branched or unbranched C 1 -C 8 alkyl, and R 3 is C 1 -C 12 alkyl; C 2 -C 12 alkenyl or C 5 -C 6 cycloalkyl, said product characterized in that under irradiation of 30MJ/m 2 at 340 nm it does not yellow by more than ΔYI of 3.