Montedison S.p.a.

Enichem Synthesis S.p.a

Francesco Gratani

Piero Di Battista

Giuseppe Nelli

Renzo Fontanelli

Carlo Neri

Silvestro Costanzi

Gianluigi Landoni

Marco Binaghi

Osvaldo Cicchetti

Acrylic or alkyd resin and polyester based covering or coating compositions are stabilized against the action of light and moisture by adding, possibly in the presence of conventional stabilizers and antioxidants, at least one compound containing at least one N-substituted, sterically hindered piperidino, morpholino or pyrrolidino group, and at least one silyl function, or a polymer structure with a polyorganosiloxane structure containing sterically hindered piperidino groups in the molecule.

Method for stabilizing lacquers and coatings, and the stabilized

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 N-alkyl-piperidine derivatives of hydroxy-benzyl-malonic acid are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyole fins, 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

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 N-alkyl-piperidine derivatives of hydroxy-benzyl-malonic acid are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in partcular polyole fins, 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.

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.

Disclosed are photodegradable and thermostable polymeric compositions based on a vinyl or vinylidene polymer such as polyethylene or polypropylene, at least one compound of a transition metal which is soluble in said polymer and which has photodegrading properties with respect to the polymer and at least one halogenated p-quinoid compound.

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Sesto San Giovanni, Italy

Francesco Gratani