Substituted decahydroquinolines and their use as ultraviolet light stabilizer

Compositions comprising (A) polymeric plastic materials subject to ultraviolet light degradation and (B) from about 0.05 part to about 10 parts by weight per 100 parts by weight of the plastic material of substituted decahydroquinoline compounds and the dimers thereof having the structural formula ##STR14## wherein R.sub.a, R.sub.b, and R.sub.c each independently are alkyl groups containing 1 to about 12 carbon atoms, a cyclohexyl group, or cyclohexylalkyl groups containing 7 to about 14 carbon atoms;

• A is selected from the group consisting of alkyl groups containing 1 to about 24 carbon atoms, hydroxyalkyl groups containing 1 to about 18 carbon atoms, alkoxy groups containing 1 to about 12 carbon atoms in the group, ester groups containing a total of from 2 to about 24 carbon atoms in the group, a cyclohexyl group, cyclohexylalkyl groups containing 7 to about 14 carbon atoms in the group, hydroxy groups, amino groups and aminoalkyl groups and alkyl-substituted amino and aminoalkyl groups wherein the alkyl contains 1 to about 12 carbon atoms;
• x is 0, 1, 2 or 3;
• and B is hydrogen, an alkyl group containing 1 to about 12 carbon atoms, a cyclohexyl group, or a cyclohexylalkyl group of 7 to about 14 carbon atoms in the group;
• and, further, wherein the dimers of the above compounds are essentially two decahydroquinoline compounds of the above structural formula attached to each other at the 4-positions, the 6-positions, the 8-positions, the 4'-, 6'-positions, and the 4'-, 8-positions on the molecule.