Patent US4192794A successfully refreshed from Google Patents.
US4192794A
Expired / Lapsed
US
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Titanium dioxide-pigmented polymer compositions having improved visible and ultraviolet light stability
Assignee: Eastman Chemical Co
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Filing: 1978-02-03
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Granted: 1980-03-11
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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 15:29
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)
US3189630A
Cited
US3511802A
Cited
US4011196A
Cited
US3954708A
Cited
US3900442A
Cited
US3971755A
Cited
US4075146A
Cited
US4022632A
Cited
US4075147A
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 |