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US 4,395,508 AGranted
Polycondensates of substituted piperidines and use thereof as stabilizers for polymers
AssigneeMontedison S.p.A.
InventorsGiuseppe Nelli, Roberto Oriani
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Abstract
New polycondensates of alkyl-substituted piperidines are disclosed. These new polycondensates are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new polycondensates is also disclosed, as well as the polymeric compositions stabilized with said new polycondensates.
Claims15
Polyamides having the general formula (II):
- ##STR9## wherein:
- each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, is an alkyl radical having 1 to 4 carbon atoms;
- R.sub.5 is hydrogen or an alkyl radical having 1 to 4 carbon atoms;
- R.sub.6 is hydrogen, an alkyl radical having 1 to 20 carbon atoms, a cycloalkyl radical having 3 to 10 carbon atoms, an aryl radical or an alkyl-aryl radical having from 6 to 20 carbon atoms;
- A is an alkylene radical having 3 to 10 carbon atoms or a cyclo-alkylene radical having 3 to 10 carbon atoms, and n is an integer from 2 to 100.
2 more elements
Dependencies are inferred from the claim text.