This invention relates to new and novel compositions and processes, whereby hindered amine light stabilizers (HALS) having either one or more amido or imido groups and/or a phenolic or anilino group are reacted with an aldehyde to give hydroxy, alkylated groups. These hydroxyalkylated groups can be further reacted with lower alkyl alcohol's to give the more stable alkoxylated derivatives. The above compositions can then be used as reactive HALS for the following polymeric systems, e.g., aminoplasts epoxies, polyesters, polyamides, and urethanes and others to confer photo stabilization.