Bis-(2,2,6,6-tetramethyl-piperidyl) diimides as light stabilizers for synthetic polymers

摘要

Bis-(2,2,6,6-tetramethyl-piperidyl)diimides are provided, having the formula: <IMAGE> I in which R is selected from the group consisting of hydrogen; oxyl; alkyl and alkenyl having from one to about eighteen carbon atoms; epoxy and hydroxyalkyl having from two to about eight carbon atoms; acyl having from two to about eight carbon atoms; and phenalkyl having from seven to about twelve carbon atoms; and Z is a tetravalent aliphatic or cycloaliphatic hydrocarbon group having from two to about eighteen carbon atoms; and stabilizer and synthetic polymer compositions containing such diimides having improved resistance to deterioration when exposed to light.