Patent US1699484A successfully refreshed from Google Patents.
Patent US4265804A successfully refreshed from Google Patents.
US4265804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oriented polyester articles having improved ultraviolet stability (III)
Assignee: Eastman Chemical Co
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Filing: 1979-01-05
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Granted: 1981-05-05
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Expires: 1999-01-05
Abstract
Abstract This invention relates to oriented polyester shaped, molded, or formed objects having improved ultraviolet stability and to a process for producing the same and to compositions used in making such objects. More particularly, the invention relates to an oriented linear polyester film, fiber, foils, sheets, and other shaped, molded, or formed objects prepared from polyester compositions containing multichromophoric ultraviolet stabilizers which when oriented provide objects having improved weatherability. Multichromophoric ultraviolet stabilizers are those stabilizers which contain two or more moieties which, if isolated from one another, absorb a portion of the ultraviolet spectrum between 280 nm and 400 nm or an aromatic ester comprised of one or more of the above moieties and which on absorption of light the ester rearranges to a moiety which absorbs between 280 nm and 400 nm.
Inventors
- 👤 Joseph S. Zannucci
- 👤 John M. Wininger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:49
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
82 words
A process for improving the weatherability and ultraviolet light stability of polyester objects comprising (1) forming said object from a polyester extrudable composition having an inherent viscosity of at least 0.4 and a 264 psi heat deflection temperature greater than 60° C. containing about 0.01 to about 10 percent by weight of at least one multichromophoric ultraviolet light stabilizer compatible with said polyester composition and (2) orienting said polyester object thereby improving the ultraviolet stability at least twice of said unoriented object.
Claim 2
Dependent Claim
82 words
A process for improving the weatherability and ultraviolet light stability of polyester objects comprising (1) forming said object from a polyester extrudable composition having an inherent viscosity of at least 0.4 and a 264 psi heat deflection temperature greater than 60° C. containing about 0.01 to about 10 percent by weight of at least one multichromophoric ultraviolet light stabilizer compatible with said polyester composition and (2) orienting said polyester object thereby improving the ultraviolet stability at least twice of said unoriented object.
Claim 3
Dependent Claim
34 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one ester of benzoxazolylbenzoic acid with a 2,4-dihydroxybenzophenone.
Claim 4
Dependent Claim
34 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one ether of a benzoxazolylbenzyl halides with 2,4-dihydroxybenzophenone.
Claim 5
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one phenyl ester of benzoxazolylbenzoic acid.
Claim 6
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one phenyl ester of 1,3,4-oxadiazole-2,5-dibenzoic acid.
Claim 7
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one aryl ester of a 2-(4-hydroxyphenyl)-benzotriazole.
Claim 8
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one benzotriazolylphenyl-substituted ether of a 2,4-dihydroxybenzophenone.
Claim 9
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one resorcinol ester of benzoxazolylbenzoic acid.
Claim 10
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one phenyl ester of 1,3,4-oxadiazole-2-benzoic acid.
Claim 11
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one benzotriazolylphenyl-substituted ether of a 4-hydroxystyrene.
Claim 12
Dependent Claim
32 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 1 wherein said multichromophoric ultraviolet light stabilizer contains at least one benzoxazolylphenyl-substituted ether of a 4-hydroxystyrene.
Claim 13
Dependent Claim
25 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 2 wherein said multichromophoric ultraviolet light stabilizer is 4-benzoyl-3-hydroxyphenyl-4-(2-benzoxazolyl)-benzoate.
Claim 14
Dependent Claim
25 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 3 wherein said multichromophoric ultraviolet light stabilizer is 2-hydroxy-4-(2-benzoxazolyl)benzyloxybenzophenone.
Claim 15
Dependent Claim
26 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 4 wherein said multichromophoric ultraviolet light stabilizer is 3-methylphenyl 4-(2-benzoxazolyl)benzoate.
Claim 16
Dependent Claim
25 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 5 wherein said multichromophoric ultraviolet light stabilizer is di-(3-methylphenyl)-2,5-diphenyl-1,3,4-oxadiazole-4'4"-dibenzoate.
Claim 17
Dependent Claim
35 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 6 wherein said multichromophoric ultraviolet light stabilizer is a member of the group consisting of 4-(2-benzotriazolyl)phenyl-4-tert-octyl-benzoate and di-[4-(2-benzotriazolyl)-phenyl terephthalate.
Claim 18
Dependent Claim
25 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 7 wherein said multichromophoric ultraviolet light stabilizer is 4-[4-(2-benzotriazolyl)phenoxy-ethoxy]-2-hydroxybenzophenone.
Claim 19
Dependent Claim
26 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 8 wherein said multichromophoric ultraviolet light stabilizer is resorcinol di[4-(2-benzoxazolyl)benzoate].
Claim 20
Dependent Claim
26 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 9 wherein said multichromophoric ultraviolet light stabilizer is 3-methylphenyl 4-(5-phenyl-1,3,4-oxadiazol-2-yl)benzoate.
Claim 21
Dependent Claim
26 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 10 wherein said multichromophoric ultraviolet light stabilizer is dimethyl 4-[4-(2-benzotriazotriazolyl)phenoxyethoxy]benzylidenemalonate.
Claim 22
Dependent Claim
26 words
A process for improving the weatherability and ultraviolet light stability of polyester objects according to claim 11 wherein said multichromophoric ultraviolet light stabilizer is dimethyl 4-[4-(2-benzoxazolyl)benzoyloxyethoxy]-benzylidenemalonate.
References Cited (Backward Citations)
US3043709A
Cited
US2968065A
Cited
US3644610A
Cited
US3840625A
Cited
US3864354A
Cited
US3889039A
Cited
US3963738A
Cited
US3957813A
Cited
US4020080A
Cited
US4116929A
Cited
US3981884A
Cited
US3939115A
Cited
US4041011A
Cited
US4000148A
Cited
US4126660A
Cited
US4062800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |