US4716234A
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Ultraviolet absorbing polymers comprising 2-(2'-hydroxy-5'-acryloyloxyalkoxyphenyl)-2H-benzotriazole
Assignee: Iolab Corp
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Filing: 1986-12-01
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Granted: 1987-12-29
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Expires: 2006-12-01
Abstract
Abstract Ultraviolet light absorbing compositions comprising 2-(2'-hydroxy-5'-acryloyloxyalkoxyphenyl(-2H-benzotrizoles, and copolymers thereof with one or more other monomers copolyermizable therewith, particularly acrylic monomers, are useful in the manufacture of ocular devices, particularly intraocular lenses and contact lenses.
Inventors
- 👤 Gary B. Dunks
- 👤 Akira Yamada
- 👤 Charles D. Beard
- 👤 Namassivaya Doddi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:56
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A compound of the formula ##STR12## wherein R 1 is H, halogen or alkoxy of 1 to 3 carbon atoms, R 2 is selected from the group consisting of H, CH 3 , and t-alkyl of 4 to 6 carbon atoms, and R 3 is ##STR13## wherein R' is C 2-10 alkylene which may be straight chain or branched, and R" is H, CH 3 or CH 2 X where X is halogen.
Claim 2
Dependent Claim
73 words
A compound of the formula ##STR12## wherein R 1 is H, halogen or alkoxy of 1 to 3 carbon atoms, R 2 is selected from the group consisting of H, CH 3 , and t-alkyl of 4 to 6 carbon atoms, and R 3 is ##STR13## wherein R' is C 2-10 alkylene which may be straight chain or branched, and R" is H, CH 3 or CH 2 X where X is halogen.
Claim 3
Dependent Claim
12 words
The compound of claim 1 wherein R 1 is --OCH 3 .
Claim 4
Dependent Claim
10 words
The compound of claim 1 wherein R 2 is t-butyl.
Claim 5
Dependent Claim
3 words
The compound 2-[2'-hydroxy-5'-(β-methacryloyloxyethoxy)-3'-tert-butylphenyl]-5-methoxy-2H-benzotriazole.
Claim 6
Dependent Claim
3 words
The compound 2-[2'-hydroxy-5'-(β-methacryloyloxyethoxy)-3'-tert-butylphenyl]-5-methoxy-2H-benzotriazole.
Claim 7
Dependent Claim
3 words
The compound 2-[2'-hydroxy-5'-(γ-methacryloyloxypropoxy)-3'-tert-butylphenyl]-5-methoxy-2H-benzotriazole.
Claim 8
Dependent Claim
3 words
The compound 2-[2'-hydroxy-5'-(γ-methacryloyloxypropoxy)-3'-tert-butylphenyl]-5-methoxy-2H-benzotriazole.
Claim 9
Dependent Claim
22 words
An ultraviolet absorbing composition comprising a polymeric material and from 0.01 to 20% by weight of a benzotriazole compound of claim 1.
Claim 10
Dependent Claim
26 words
The composition of claim 6 wherein said polymeric material is selected from the group consisting of polyvinyl halides, polyacrylates, polystyrene, polyvinylidene halides, polycarbonates and acrylonitrile-butadiene-styrene terpolymers.
Claim 11
Dependent Claim
9 words
A plastic film comprising the composition of claim 6.
Claim 12
Dependent Claim
9 words
A coating material comprising the composition of claim 6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |