Stabilization of olefin polymers
AssigneePhillips Petroleum Company
InventorsJames S. Dix, Ronald D. Mathis
Life of this patent
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Abstract
Homopolymers and copolymers of 1-olefins are protected against the deleterious effects of ultraviolet light by incorporating therein an additive system consisting of a nickel carboxylate and a piperidine derivative in an amount sufficient to prevent such deterioration.
Claims17
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.sup.1 and R.sup.2 are individually selected from the group consisting of hydrogen and an alkyl member of 1 to 4 carbon atoms;
- 2.
compounds of the formula ##STR5## wherein Me, R.sup.1 and R.sup.2 are as described above, and n is an integer having a value of 1 or 2, wherein
- when n is 1, R.sup.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.sup.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.
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.sup.1 and R.sup.2 are individually selected from the group consisting of hydrogen and an alkyl member of 1 to 4 carbon atoms;
- 2. compounds of the formula ##STR8## wherein Me, R.sup.1 and R.sup.2 are as described above, and n is an integer having a value of 1 or 2, wherein
- when n is 1, R.sup.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.sup.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. compounds of the formula ##STR9## wherein Me, R.sup.1 and R.sup.2 are as defined above and R.sup.4 is a member selected from the group consisting of hydrogen and alkyl having from 1 to 12 carbon atoms.
Dependencies are inferred from the claim text.