US3975358A
Expired / Lapsed
US
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Polymers stabilized with an organo-nickel compound and a dialkyl pentaerythritol diphosphite
Assignee: Wyeth Holdings LLC
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Filing: 1972-04-26
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Granted: 1976-08-17
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Expires: 1992-04-26
Abstract
Abstract Nickel amine, nickel alkanolamine, nickel aquo, and nickel bis- complexes of 2,2'-thiobis(p-alkylphenol), used to stabilize materials against degradation by ultraviolet radiation, are stabilized against thermal degradation by use of a dialkyl pentaerythritol diphosphite.
Inventors
- 👤 Joseph Anthony Stretanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091; C08K5/49; C08K5/51; C08K5/52; C08K5/527
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
A polymer subject to degradation on exposure to ultraviolet radiation stabilized against degradation on exposure to ultraviolet radiation by an effective amount of a nickel amine, nickel aquo, or nickel bis- complex of 2,2'-thiobis(p-alkylphenol) wherein each alkyl group has up to 18 carbon atoms and further stabilized against thermal degradation of said complex on exposure to heat by an effective amount of a dialkyl pentaerythritol diphosphite wherein each alkyl group has 6 to 20 carbon atoms said polymer being selected from the group consisting of polyolefins, acrylonitrile-butadiene-styrene polymers, polystyrene, polycarbonates, and polyamides.
Claim 2
Dependent Claim
92 words
A polymer subject to degradation on exposure to ultraviolet radiation stabilized against degradation on exposure to ultraviolet radiation by an effective amount of a nickel amine, nickel aquo, or nickel bis- complex of 2,2'-thiobis(p-alkylphenol) wherein each alkyl group has up to 18 carbon atoms and further stabilized against thermal degradation of said complex on exposure to heat by an effective amount of a dialkyl pentaerythritol diphosphite wherein each alkyl group has 6 to 20 carbon atoms said polymer being selected from the group consisting of polyolefins, acrylonitrile-butadiene-styrene polymers, polystyrene, polycarbonates, and polyamides.
Claim 3
Dependent Claim
75 words
A polymer composition as defined in claim 1 wherein said complex has the formula: ##SPC3## wherein each R is an alkyl group of 1 to 18 carbon atoms and A is a member selected from the group consisting of primary aliphatic amines, primary aromatic amines, cyclic secondary amines, water and alkanolamines and wherein said diphosphite has the formula: ##STR2## wherein R 1 and R 2 are each alkyl groups of 6 to 20 carbon atoms.
Claim 4
Dependent Claim
44 words
A polymer composition as defined in claim 1 wherein said complex is present in a concentration between about 0.01% and about 5% on weight of polymer and said diphosphite is present in a concentration between about 0.02% and about 1% on weight of polymer.
Claim 5
Dependent Claim
14 words
A polymer composition as defined in claim 1 wherein said polymer is a polyolefin.
Claim 6
Dependent Claim
38 words
A polymer composition as defined in claim 2 wherein said complex is (a) the nickel n-butylamine complex, (b) the nickel cyclohexyldiethanolamine, or (c) the nickel cyclohexylamine complex of 2,2'-thiobis(p-t-octylphenol) and said diphosphite is diisodecyl or distearyl pentaerythritol diphosphite.
Claim 7
Dependent Claim
42 words
A stabilizer composition comprising, in combination, a nickel amine, nickel aquo, or nickel bis- complex of 2,2'-thiobis(p-alkylphenol) wherein each alkyl group has up to 18 carbon atoms and a dialkyl pentaerythritol diphosphite wherein each alkyl group has 6 to 20 carbon atoms.
Claim 8
Dependent Claim
42 words
A stabilizer composition comprising, in combination, a nickel amine, nickel aquo, or nickel bis- complex of 2,2'-thiobis(p-alkylphenol) wherein each alkyl group has up to 18 carbon atoms and a dialkyl pentaerythritol diphosphite wherein each alkyl group has 6 to 20 carbon atoms.
Claim 9
Dependent Claim
75 words
A stabilizer composition as defined in claim 6 wherein said complex has the formula: ##SPC4## wherein each R is an alkyl group of 1 to 18 carbon atoms and A is a member selected from the group consisting of primary aliphatic amines, primary aromatic amines, cyclic secondary amines, water and alkanolamines and wherein said diphosphite has the formula: ##STR3## wherein R 1 and R 2 are each alkyl groups of 6 to 20 carbon atoms.
Claim 10
Dependent Claim
23 words
A stabilizer composition as defined in claim 6 containing one part of said diphosphite for every 4 to 20 parts of said complex.
Claim 11
Dependent Claim
47 words
A polymer composition as defined in claim 1 wherein said complex is characterized by either a single nitrogen-to-nickel coordinate bond and a single nickel-to-sulfur coordinate bond for each nickel atom in the complex molecule or two nickel-to-sulfur coordinate bonds for each nickel atom in the complex molecule.
Claim 12
Dependent Claim
47 words
A polymer composition as defined in claim 6 wherein said complex is characterized by either a single nitrogen-to-nickel coordinate bond and a single nickel-to-sulfur coordinate bond for each nickel atom in the complex molecule or two nickel-to-sulfur coordinate bonds for each nickel atom in the complex molecule.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |