Piperidine polymers and use thereof as stabilizers

Claim 2

Substituted poly-oxy-methylene-piperidines having the general formula: ##STR9## wherein: R 1 , R 2 , R 3 , R 4 , either like or unlike one another, are each an alkyl radical containing 1 to 4 carbon atoms, or R 1 and R 2 , and/or R 3 and R 4 , together, form a cyclo-alkylene radical containing 3 to 12 carbon atoms; R 5 is hydrogen, an alkyl, hydroxyalkyl or alkyl-oxy radical containing 1 to 6 carbon atoms; an aryl or arylalkyl radical containing 6 to 18 carbon atoms; an alkenyl radical containing 2 to 6 carbon atoms or a --(CH 2 ) X CO 2 R 7 radical in which X is zero or an integer from 1 to 12 and R 7 is H, a metal selected from the alkaline metals, the alkaline-earth metals, and the transition metals, an alkyl, alkylene, alkenyl, alkenylene radical, each containing 1 to 20 carbon atoms; R 6 is hydrogen or an alkyl radical containing 1 to 4 carbon atoms, and n is an integer from 2 to 100.

Claim 3

Substituted poly-oxy-methylene-piperidines having general formula (I) according to claim 1, in which: R 1 , R 2 , R 3 , R 4 are each methyl; R 5 is hydrogen or methyl; R 6 is hydrogen and n is an integer from 4 to 20.

Claim 4

Substituted poly-oxy-methylene-piperidines having general formula (I) according to claim 1 and in which R 5 is a --(CH 2 ) X CO 2 R 7 radical with R 7 being selected from the metals Ba, Ca, Na, K, Ni and Co.

Claim 5

A process for preparing the substituted poly-oxy-methylene-piperidines having general formula (I), as in claims 1, 2 or 3, characterized in that it consists in polymerizing, at a temperature ranging from 50° to 250° C. and in the presence of a known catalyst suitable for the polymerization of epoxides, 4-spiro-oxirane derivatives of piperidine, which have the general formula: ##STR10## in which: R 1 , R 2 , R 3 , R 4 , either like or unlike one another, are each an alkyl radical containing 1 to 4 carbon atoms, or R 1 and R 2 , and/or R 3 and R 4 , together, form a cyclo-alkylene radical containing 3 to 12 carbon atoms; R 5 is hydrogen, an alkyl, oxyalkyl or alkoxy radical containing 1 to 6 carbon atoms, an aryl or arylalkyl radical containing 6 to 18 carbon atoms; an alkenyl radical containing 2 to 6 carbon atoms or a --(CH 2 ) X CO 2 R 7 radical in which X is zero or an integer from 1 to 12 and R 7 is H, a metal selected from the alkaline metals, the alkaline-earth metals, and the transition metals, an alkyl, alkylene, alkenyl, alkenylene radical, each containing 1 to 12 carbon atoms; and R 6 is hydrogen or an alkyl radical containing 1 to 4 carbon atoms.

Claim 6

The process of claim 4 in which in the general formula for the 4-spiro-oxirane derivative of piperidine, R 5 is a --(CH 2 ) X CO 2 R 7 with R 7 being selected from the metals Ba, Ca, Na, K, Ni and Co.

Claim 7

A composition comprising a thermoplastic synthetic polymer stabilized to light, to oxygen and to heat, and characterized in that it contains, in an amount sufficient to prevent degradation of the thermoplastic synthetic polymer, a substituted poly-oxy-methylene-piperidine having the general formula (I) according to claim 1.

Claim 8

A composition according to claim 6, characterized in that the substituted poly-oxy-methylene-piperidine having general formula (I) is present therein in an amount of from 0.01 to 5% by weight, referred to the thermoplastic synthetic polymer.

Claim 9

A composition according to claim 6, characterized in that the thermoplastic synthetic polymer is a polyolefin.

Claim 10

A composition according to claim 8, characterized in that the polyolefin is polypropylene consisting prevailingly of isotactic macromolecules.

Claim 11

A composition according to claim 8, characterized in that the substituted poly-oxy-methylene-piperidine having general formula (I) is contained therein in an amount ranging from 0.01 to 2% by weight.

Claim 12

A composition according to claim 9, characterized in that the substituted poly-oxy-methylene-piperidine having general formula (I) is contained therein in an amount from 0.01% to 2% by weight.

Claim 13

A composition according to claim 6, characterized in that the thermoplastic synthetic polymer is polyvinyl chloride or polyvinylidene chloride.

Claim 14

A composition according to claim 12, characterized in that the substituted poly-oxy-methylene-piperidine having general formula (I) is contained therein in an amount from 0.01 to 1% by weight in respect to the polyvinyl chloride or polyvinylidene chloride.

Claim 15

A composition according to claim 6, characterized in that the thermoplastic synthetic polymer is a polyurethane or a polyamide.

Claim 16

A composition according to claim 14, characterized in that the substituted poly-oxy-methylene-piperidine having general formula (I) is contained therein in an amount from 0.01 to 5% by weight.

Claim 17

A composition according to claim 6 or 7, characterized in that the substituted poly-oxy-methylene-piperidine having general formula (I) is employed in admixture with other additives selected from the group consisting of oxy-benzotriazoles, oxy-benzophenones, Ni-stabilizers, metal soaps, phenolic antioxidants, phosphites, phosphinites, thioesters, hydroquinone derivatives, triazinic compounds, acylamino-phenols, and benzyl-phosphonates.

Claim 18

A composition according to claim 16, characterized in that the other additives are present with the substituted poly-oxy-methylene-piperidine having general formula (I), in a weight ratio ranging from 0.5:1 to 3:1.