| abstract |
Provided herein are polyvinylacetal compositions, monolayer and multilayer films and sheets (interlayers), and laminates made with these interlayers, which have reduced edge yellowing after exposure to heat, which is accomplished by adding an oligomeric hindered amine light stabilizer with antioxidant functionality at levels generally about 0.2 percent by weight or less, wherein substantially no additional antioxidant or other HALS is present. |