Stabilization of olefin polymers

Claim 2

A polyolefin composition stabilized against ultraviolet degradation comprising a normally solid polymer of an aliphatic 1-olefin having from 2 to 8 carbon atoms per molecule having incorporated therein a stabilizing amount of an ultraviolet light stabilizing system consisting of: A. a nickel salt of a saturated fatty acid having from 8 to 20 carbon atoms per molecule, and B. a piperidine derivative selected from the group consisting of 1. compounds of the formula ##STR4## wherein Me is methyl, and R 1 and R 2 are individually selected from the group consisting of hydrogen and an alkyl member of 1 to 4 carbon atoms; 2.

Claim 3

compounds of the formula ##STR5## wherein Me, R 1 and R 2 are as described above, and n is an integer having a value of 1 or 2, wherein when n is 1, R 3 is selected from the group consisting of hydrogen and an acyl member derived from a saturated, unsubstituted aliphatic monocarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic monocarboxylic acid having from 7 to 20 carbon atoms, when n is 2, R 3 is a diacyl member derived from a saturated, unsubstituted aliphatic dicarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic dicarboxylic acid having from 8 to 20 carbon atoms; and 3.

Claim 4

compounds of the formula ##STR5## wherein Me, R 1 and R 2 are as described above, and n is an integer having a value of 1 or 2, wherein when n is 1, R 3 is selected from the group consisting of hydrogen and an acyl member derived from a saturated, unsubstituted aliphatic monocarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic monocarboxylic acid having from 7 to 20 carbon atoms, when n is 2, R 3 is a diacyl member derived from a saturated, unsubstituted aliphatic dicarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic dicarboxylic acid having from 8 to 20 carbon atoms; and 3.

Claim 5

compounds of the formula ##STR6## wherein Me, R 1 and R 2 are as defined above and R 4 is a member selected from the group consisting of hydrogen and alkyl having

Claim 6

compounds of the formula ##STR6## wherein Me, R 1 and R 2 are as defined above and R 4 is a member selected from the group consisting of hydrogen and alkyl having

Claim 7

from 1 to 12 carbon atoms. 2. The composition of claim 1 wherein said compound (A) is present in an amount ranging from 0.05 to about 5 php and said compound (B) is present in an approximate amount ranging from 0.05 to

Claim 8

about 5 php. 3. The composition of claim 1 wherein said polymer is polypropylene.

Claim 9

The composition of claim 1 wherein the weight ratio of said compound (A) to said compound (B) is in the approximate range of 10:1 to 1:10.

Claim 10

The composition of claim 1 wherein said compound (A) is present in an amount of ranging from about 0.1 to about 1.25 php and said compound (B) is present in an amount ranging from about 0.1 to about 1.25 php.

Claim 11

The composition of claim 1 wherein said weight ratio of (A):(B) is in the approximate range of 3:1 to 1:3.

Claim 12

The composition of claim 1 having additionally incorporated therein (c) a hindered phenol heat stabilizer.

Claim 13

The composition of claim 7 wherein said compound (c) is present in an amount ranging from about 0.02 to about 1 php and wherein the weight ratio of (A+B) to (c) is in the approximate range of 100:1 to 2:1.

Claim 14

The composition of claim 7 wherein said compound (c) is present in an amount ranging from about 0.05 to about 0.5 php.

Claim 15

The composition of claim 7 wherein said compound (A) is nickel stearate, said compound B is bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, said compound (C) is tris(3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate and said polymer is polypropylene.

Claim 16

The composition of claim 7 wherein said compound (A) is nickel stearate, said compound (B) is bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, said compound (C) is octadecyl[3-(3,5-di-t-butyl-4-hydroxyphenyl)]propionate and said polymer is polypropylene.

Claim 17

The composition of claim 7 wherein said compound (A) is nickel stearate, said compound (B) is 1,3,8-triaza-2,4-dioxo-3-octyl-7,7,9.9-tetramethyl -spiro[4.5]decane, said compound (C) is tris(3.5-di-t-butyl-4-hydroxybenzyl) isocyanurate and said polymer is polypropylene.

Claim 18

An ultraviolet light stabilizer system for polymers consisting of a mixture of: A. a nickel salt of a saturated fatty acid having from 8 to 20 carbon atoms per molecule, and B. a piperidine derivative selected from the group consisting of 1. compounds of the formula ##STR7## wherein Me is methyl, and R 1 and R 2 are individually selected from the group consisting of hydrogen and an alkyl member of 1 to 4 carbon atoms;

Claim 19

An ultraviolet light stabilizer system for polymers consisting of a mixture of: A. a nickel salt of a saturated fatty acid having from 8 to 20 carbon atoms per molecule, and B. a piperidine derivative selected from the group consisting of 1. compounds of the formula ##STR7## wherein Me is methyl, and R 1 and R 2 are individually selected from the group consisting of hydrogen and an alkyl member of 1 to 4 carbon atoms;

Claim 20

compounds of the formula ##STR8## wherein Me, R 1 and R 2 are as described above, and n is an integer having a value of 1 or 2, wherein when n is 1, R 3 is selected from the group consisting of hydrogen and an acyl member derived from a saturated, unsubstituted aliphatic monocarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic monocarboxylic acid having from 7 to 20 carbon atoms, when n is 2, R 3 is a diacyl member derived from a saturated, unsubstituted aliphatic dicarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic dicarboxylic acid having from 8 to 20 carbon atoms; and

Claim 21

compounds of the formula ##STR8## wherein Me, R 1 and R 2 are as described above, and n is an integer having a value of 1 or 2, wherein when n is 1, R 3 is selected from the group consisting of hydrogen and an acyl member derived from a saturated, unsubstituted aliphatic monocarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic monocarboxylic acid having from 7 to 20 carbon atoms, when n is 2, R 3 is a diacyl member derived from a saturated, unsubstituted aliphatic dicarboxylic acid having from 6 to 20 carbon atoms or an unsubstituted or alkyl-substituted aromatic dicarboxylic acid having from 8 to 20 carbon atoms; and

Claim 22

compounds of the formula ##STR9## wherein Me, R 1 and R 2 are as defined above and R 4 is a member selected from the group consisting of hydrogen and alkyl having from 1 to 12 carbon atoms.

Claim 23

compounds of the formula ##STR9## wherein Me, R 1 and R 2 are as defined above and R 4 is a member selected from the group consisting of hydrogen and alkyl having from 1 to 12 carbon atoms.

Claim 24

The system of claim 13 wherein the weight ratio of said compound (A) to said compound (B) is in the approximate range of 10:1 to 1:10.

Claim 25

The system of claim 13 wherein the weight ratio of said compound (A) to said compound (B) is in the approximate range of 3:1 to 1:3.

Claim 26

The system of claim 13 wherein said compound (A) is nickel stearate and said compound B is bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate.

Claim 27

The system of claim 13 wherein said compound (A) is nickel stearate and said compound (B) is 1,3,8-triaza-2,4-dioxo-3-octyl-7,7,9,9- tetramethyl-spiro[4.5]decane.