Stabilizers for polymers and polymers stabilized thereby
AssigneeMontedison S.p.A.
InventorsPiero Di Battista, Renzo Fontanelli, Francesco Gratani, Giuseppe Nelli
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Abstract
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.
Claims14
Derivatives of N,N'-piperidyl-tetralkyl-substituted alkylene diamine having the formula (I):
- ##STR9## in which:
- 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 having 1 to 4 carbon atoms;
- R.sub.5 is hydrogen or an alkyl having 1 to 4 carbon atoms;
- A is an alkylene group having 2 to 10 carbon atoms or a cycloalkylene group having 4 to 10 carbon atoms;
- x and y are integers from 0 to 10;
- each of R.sub.6, R.sub.7, R.sub.8 and R.sub.9, which may be the same or different, is a linear or ramified alkyl group having 1 to 8 carbon atoms or an aralkyl group having 7 to 18 carbon atoms, and B is hydrogen, a linear or ramified alkyl group having 1 to 8 carbon atoms, a cycloalkyl, aryl or alkyl-aryl group having 4 to 18 carbon atoms, a phosphite group ##STR10## or a phosphate group ##STR11## in which each of R.sub.10 and R.sub.11, which may be the same or different, is an alkyl radical having 1 to 6 carbon atoms, an alkenyl radical having 2 to 6 carbon atoms, a cycloalkyl, aryl, arylene or alkyl-aryl radical having 4 to 18 carbon atoms or R.sub.10 and R.sub.11 together form an aromatic nucleus, or a substituted aromatic nucleus.
Compositions comprising synthetic thermoplastic polymers stabilized to sunlight, to heat and to ageing, and having incorporated therein, in an amount sufficient to prevent degradation of the polymer, a compound having formula:
- ##STR13## in which:
- each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, represent an alkyl having 1 to 4 carbon atoms;
- R.sub.5 is hydrogen or an alkyl having 1 to 4 carbon atoms;
- A is an alkylene group having 2 to 10 carbon atoms or a cycloalkylene group having 4 to 10 carbon atoms;
- x and y are integers from 0 to 10;
- each of R.sub.6, R.sub.7, R.sub.8 and R.sub.9, which may be the same or different, is a linear or ramified alkyl group having 1 to 8 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms, and B is hydrogen, a linear or ramified alkyl group having 1 to 8 carbon atoms, a cycloalkyl, aryl or alkylaryl group having 4 to 18 carbon atoms, a phosphite group ##STR14## or a phosphate group ##STR15## in which R.sub.10 and R.sub.11, which may be the same or different, represent an alkyl radical having 1 to 6 carbon atoms, an alkenyl radical having 2 to 6 carbon atoms, a cycloalkyl, aryl, arylene or alkyl-aryl radical having 4 to 18 carbon atoms, or R.sub.10 and R.sub.11 together form an aromatic necleus, or a substituted aromatic nucleus.
Dependencies are inferred from the claim text.