Patent US3843595A successfully refreshed from Google Patents.
US3843595A
Expired / Lapsed
US
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Ultraviolet light stabilizer combinations for polymers
Assignee: Phillips Petroleum Co
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Filing: 1972-09-06
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Granted: 1974-10-22
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Expires: 1992-09-06
Abstract
Abstract Ultraviolet light stabilizer combinations for polymeric materials are described which comprise mixtures of at least two components selected from nickel dithiocarbamates, zinc dithiocarbamates, and hydroxy-substituted phenyl benzoates. A preferred embodiment includes the use of the stabilizer mixtures as ultraviolet light stabilizers for polypropylene.
Inventors
- 👤 R Mathis
- 👤 J Dix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
24 words
A COMPOSITION OF MATTER USEFUL AS A STABILIZER FOR POLYMERS WHICH COMPRISES A MIXTURE OF AT LEAST ONE NICKEL DITHIOCARBAMATE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
24 words
A COMPOSITION OF MATTER USEFUL AS A STABILIZER FOR POLYMERS WHICH COMPRISES A MIXTURE OF AT LEAST ONE NICKEL DITHIOCARBAMATE REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
17 words
A composition in accord with claim 1, wherein said at least one nickel dithiocarbamate is nickel dibutyldithiocarbamate.
Claim 4
Dependent Claim
18 words
A composition in accord with claim 1, wherein said at least one hydroxy-substituted phenyl benzoate is 2'',4''-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate.
Claim 5
Dependent Claim
29 words
A composition in accord with claim 1 wherein said at least one nickel dithiocarbamate is nickel dibutyldithiocarbamate and wherein said at least one hydroxy-substituted phenyl benzoate is 2'',4''-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate.
Claim 6
Dependent Claim
18 words
A composition in accordance with claim 1 additionally comprising at least one zinc dithiocarbamate represented by the formula
Claim 7
Dependent Claim
17 words
A composition in accord with claim 5 wherein said at least one zinc dithiocarbamate is zinc dibutyldithiocarbamate.
Claim 8
Dependent Claim
17 words
A composition in accordance with claim 5, wherein said at least one nickel dithiocarbamate is nickel dibutyldithiocarbamate.
Claim 9
Dependent Claim
17 words
A composition in accordance with claim 5, wherein said at least one phenyl benzoate is 2'',4''-di-t-butylphenyl 3,5-di-t-4-hydroxybenzoate.
Claim 10
Dependent Claim
98 words
A composition in accordance with claim 5, wherein the ratio by weight of said at least one nickel dithiocarbamate to said at least one phenyl benzoate is within the range of from about 4:1 to about 1:4, wherein the ratio by weight of said at least one nickel dithiocarbamate to said at least one zinc dithiocarbamate is within the range of from about 4:1 to about 1:4, and wherein the ratio by weight of said at least one phenyl benzoate to said at least one zinc dithiocarbamate is within the range of from about 4:1 to about 1:4.
Claim 11
Dependent Claim
17 words
A composition comprising polyolefin and a mixture of at least one nickel dithiocarbamate represented by the formula
Claim 12
Dependent Claim
17 words
A composition comprising polyolefin and a mixture of at least one nickel dithiocarbamate represented by the formula
Claim 13
Dependent Claim
38 words
A composition in accordance with claim 10, wherein said mixture comprises a mixture of nickel dibutyldithiocarbamate and 2'',4''-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate, and wherein said polyolefin is derived from the polymerization of aliphatic 1-olefins having from 2 to 8 carbon atoms.
Claim 14
Dependent Claim
12 words
A composition in accordance with claim 11 wherein said polyolefin is polypropylene.
Claim 15
Dependent Claim
44 words
A composition in accordance with claim 12 wherein said nickel dibutyldithiocarbamate and said 2'',4''-di-t-butylphenyl 3, 5-di-t-butyl-4-hydroxybenzoate are each present in an amount in the range of from about 0.1 part to about 1 part by weight per 100 parts by weight of said polyolefin.
Claim 16
Dependent Claim
18 words
A composition in accordance with claim 10 additionally comprising at least one zinc dithiocarbamate represented by the formula
Claim 17
Dependent Claim
21 words
A composition in accordance with claim 14, wherein said mixture is a mixture of nickel dibutyldithiocarbamate, zinc dibutyldithiocarbamate, and 2'',4''-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate.
Claim 18
Dependent Claim
25 words
A composition in accordance with claim 15, wherein said polyolefin is derived from the polymerization of aliphatic 1-olefins having from 2 to 8 carbon atoms.
Claim 19
Dependent Claim
12 words
A composition in accordance with claim 15, wherein said polyolefin is polypropylene.
Claim 20
Dependent Claim
46 words
A composition in accordance with claim 15, wherein said nickel dibutyldithiocarbamate, said zinc dibutyldithiocarbamate, and said 2'',4''-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate are each present in an amount in the range of from about 0.1 part to about 1 part by weight per 100 parts by weight of said polyolefin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |