| abstract |
Novel 2,2,6,6-tetramethyl-4-piperidyl substituted nitrogen heterocyclic ring compounds containing two nonadjacent nuclear nitrogen atoms are provided which are useful as stabilisers for organic polymers. Organic polymers containing the 2,2,6,6-tetramethyl-4-piperidyl substituted nitrogen heterocyclic ring compounds dispersed therein exhibit improved resistance to deterioration induced by light, by heat or both. The 2,2,6,6-tetramethyl-4-piperidyl substituted nitrogen heterocyclic ring compounds may be prepared by a method comprising reacting a 2,2,6,6-tetramethyl-4-piperidyl substituted 1,2-aliphatic diamine with a monoaldehyde or dialdehyde. |