Montedison S.p.a.

Montecantini Edison S.p.a.

Giuseppe Nelli

Piero Di Battista

Francesco Gratani

Renzo Fontanelli

Roberto Oriani

Osvaldo Cicchetti

Dario Sianesi

Valentino Zamboni

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.

Polycondensates of substituted piperidines and use thereof as

New N,N'-di-(hydroxy-phenyl) derivatives of piperazine are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the polymeric compositions stabilized with said new compounds.

N,N-Di-(hydroxy-phenyl) derivatives of piperazine and use thereof as

New polyesters of N,N-di-alkanol-amines with di-(hydroxy-alkyl-benzyl) malonic acids are disclosed. The new polyesters are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new polyesters is also disclosed, as well as the polymeric compositions stabilized with said new polyesters.

Polyesters of N,N-di-alkanol-amines with di-(hydroxy-alkyl-benzyl)

New derivatives of N,N'-4-piperidyl-tetraalkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.

Piperidine phosphite stabilizers for polymers and polymers stabilized

New derivatives of N,N'-4-piperidyl-tetralkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.

Stabilizers for polymers and polymers stabilized thereby

Perfluoropolyether compounds and mixtures thereof having the formula:

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Milan, Italy

Giuseppe Nelli