UV LIGHT STABLE POLYCARBONATE EXTRUDED ARTICLES Russian patent published in 2011 - IPC B32B27/08 B32B27/18 B32B27/30 B32B27/36 C08K5/3492 

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer polycarbonate article, e.g. plate, film or 3D extruded part used for glasing. Proposed article comprises first layer A protecting against UV light and made from polyalkyl methacrylate with thickness of 1 to 2 mcm, containing 0.01 to 20 wt % of biphenyl-substituted triazine of formula (I) as UV stabiliser , where X stands for OR¹ or OCH(R²)COOR³. Note here that R¹ is alkyl with the number of hydrogen atoms varying from 4 to 12, R² is alkyl with the number of carbon atoms varying from1 to 6, and R³ stands for alkyl residue with the number of carbon atoms varying from 1 to 12. Note also that second layer B comprises polycarbonate.

EFFECT: higher light stability as compared with similar products containing other UV stabilisers.

12 cl, 1 tbl, 8 ex