US4192794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium dioxide-pigmented polymer compositions having improved visible and ultraviolet light stability
Assignee: Eastman Chemical Co
•
Filing: 1978-02-03
•
Granted: 1980-03-11
•
Expires: 1998-02-03
Abstract
Abstract The combination of a zinc salt of a carboxylic acid and a phenolic ultraviolet stabilizer provides a highly effective ultraviolet stabilizer system for TiO 2 -pigmented polymeric compositions.
Inventors
- 👤 Richard H. S. Wang
- 👤 Gether Irick, Jr.
- 👤 James C. Ownby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:16
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
An ultraviolet light stabilized pigmented polyolefin polymeric composition comprising (1) a polyolefin polymeric composition normally susceptible to degradation due to visible or ultraviolet light, (2) titanium dioxide, (3) a phenolic ultraviolet stablizer and (4) 0.1 to 5 percent of a zinc salt of a carboxylic acid having the formula: ##STR2## wherein R' is an alkyl group having 1 to 20 carbon atoms or an aryl group.
Claim 2
Dependent Claim
66 words
An ultraviolet light stabilized pigmented polyolefin polymeric composition comprising (1) a polyolefin polymeric composition normally susceptible to degradation due to visible or ultraviolet light, (2) titanium dioxide, (3) a phenolic ultraviolet stablizer and (4) 0.1 to 5 percent of a zinc salt of a carboxylic acid having the formula: ##STR2## wherein R' is an alkyl group having 1 to 20 carbon atoms or an aryl group.
Claim 3
Dependent Claim
17 words
An ultraviolet light stabilized pigmented composition according to claim 1 wherein R' is methyl, ethyl, or phenyl.
Claim 4
Dependent Claim
14 words
An ultraviolet light stabilized pigmented composition of claim 1 wherein the polyolefin is polypropylene.
Claim 5
Dependent Claim
18 words
An ultraviolet light stabilized pigmented composition of claim 1 wherein the polyolefin is a polypropylene graft acrylic acid.
Claim 6
Dependent Claim
22 words
An ultraviolet light stabilized pigmented composition according to claim 1 wherein said phenolic ultraviolet stabilizer is 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate, 2,6-bis(2-hydroxy-3-tert-butyl-5-methylbenzyl)-4-methylphenol, bis[2-hydroxy-3-(1-methylcyclohexyl)-5-methyl-phenyl)methane], or bis(2-methyl-5-tert-butyl-4-hydroxyphenyl)-sulfide).
Claim 7
Dependent Claim
16 words
An ultraviolet light stabilized pigmented composition according to claim 5 wherein the polymeric composition is polypropylene.
Claim 8
Dependent Claim
17 words
An ultraviolet light stabilized pigmented composition according to claim 6 wherein the zinc salt is zinc benzoate.
Claim 9
Dependent Claim
17 words
An ultraviolet light stabilized pigmented composition according to claim 6 wherein the zinc salt is zinc acetate.
References Cited (Backward Citations)
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US3954708A
Cited
US3900442A
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |