Hindered amine light stabilizer, methods of making, and compositions

摘要

A compound in which n is 0, 1, 2, or 3; R¹, R², R⁷, and R⁸ are each independently alkyl group, including cycloalkyl, an alkylaryl group, or an aryl group, optionally with one or more heteroatoms, with the proviso that R¹ and R² can together form a cycloalkylene group and, independently, R⁷ and R⁸ can together form a cycloalkylene group; Y is an oxygen free radical, a sulfur free radical, OR⁹ or SR⁹; R³, R⁴, R⁵, R⁶, and R⁹ are each independently H or an alkyl group, a cycloalkyl group, an aryl group, or an alkylaryl group, optionally with one or more heteroatoms; and compositions, such as basecoat and clearcoat coating compositions, containing such compounds.