Patent EP0131468A2 successfully refreshed from Google Patents.
EP0131468A2
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Ultraviolet absorbing polymers comprising 2-hydroxy-5-acrylyloxalkylphenyl-2H-benzotriazoles
Assignee: Iolab Corp
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Filing: 1984-07-10
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Granted: —
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Expires: 2004-07-10
Abstract
Abstract 57 Ultraviolet light absorbing polymer compositions comprising copolymers of 2-Hydroxy-5-acrylyloxyphenyl -2H-benzotriazoles with one or more other monomers copolymerizable therewith, particularly acrylic monomers are useful in the manufacture of occular devices, particularly intraoccular lenses and contact lenses. The benzotriazole monomers are prepared from the corresponding intermediate phenyl alcohols 2'-Hydroxy -5'- acrylyloxyphenyl -2H-benzotriazoles.
Inventors
- 👤 Charles David Beard
- 👤 Namassivaya Doddi
- 👤 Akira Yamada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 16:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A compound of the formula wherein X is H or halogen, each R 1 is selected from the group consisting of H, CH 3 , t-alkyl of 4 to 6 carbons and wherein R2 is C 2 -C 10 alkylene which may be straight chain or branched, and R 3 is H or CH 3 , provided that one R 1 is H, CH 3 , or t-alkyl and the other R 1 is and homopolymers and copolymers thereof.
Claim 2
Dependent Claim
79 words
A compound of the formula wherein X is H or halogen, each R 1 is selected from the group consisting of H, CH 3 , t-alkyl of 4 to 6 carbons and wherein R2 is C 2 -C 10 alkylene which may be straight chain or branched, and R 3 is H or CH 3 , provided that one R 1 is H, CH 3 , or t-alkyl and the other R 1 is and homopolymers and copolymers thereof.
Claim 3
Dependent Claim
25 words
2 . A compound according to claim 1, which is 2-(2'-Hydroxy-5'-methacrylyloxyethyl-phenyl)-2H-benzotriazole; 2-(2'-Hydroxy-5'-methacrylyloxyethyl- phenyl)-5-chloro-2H-benzotriazole; 2-(2'-Hydroxy-5'-methacrylyloxypropyl- 2-(2'-Hydroxy-5'-methacrylyloxypropyl- phenyl)-5-chloro-2H-benzotriazole; 2-(2'-Hydroxy-5'-methacrylyloxypropyl-3'-tert-butylphenyl)-2H-benzotriazole; or tert-butylphenyl)-5-chloro-2H-benzotriazole; and .. homopolymers and copolymers thereof.
Claim 4
Dependent Claim
25 words
An Ultraviolet absorbing composition comprising a copolymer of an ethylenically unsaturated monomer and an effective amount of a compound of Claim 1 or claim 2.
Claim 5
Dependent Claim
29 words
The composition of Claim 3 wherein said ethylenically unsaturated monomer is styrene, methylstyrene, acrylate, methylcrylate, acrylamide, acrylonitrile, methacrylonitrile, vinylacetate, vinylidene chloride, vinyl chloride, ethylene, propylene or a mixture thereof.
Claim 6
Dependent Claim
16 words
The composition of claim 3 or claim 4 wherein the ethylenically unsaturated monomer is methyl methacrylate.
Claim 7
Dependent Claim
27 words
The composition of any one of claims 3 to 5 , comprising 0.05 to 20% by weight of said compound according to claim 1 or claim 2.
Claim 8
Dependent Claim
21 words
The composition of claim 6, comprising 0.05 to 5.0% by weight of said compound according to claim 1 or claim 2.
Claim 9
Dependent Claim
20 words
A contact lens or intraocular lens comprising an optically clear composition according to any one of claims 3 to 7.
Claim 10
Dependent Claim
59 words
A compound of the formula wherein X is H, halogen or -OCH 3 ; R 1 is selected from the group consisting of H, CH 3 , and n-, sec- and t-alkyl of 4 to 6 carbons; and R 2 is a C n alkylene which may be straight chain or branched wherein n is from 2 to 10.
Claim 11
Dependent Claim
59 words
A compound of the formula wherein X is H, halogen or -OCH 3 ; R 1 is selected from the group consisting of H, CH 3 , and n-, sec- and t-alkyl of 4 to 6 carbons; and R 2 is a C n alkylene which may be straight chain or branched wherein n is from 2 to 10.
Claim 12
Dependent Claim
16 words
10 . The compound of claim 9, which is 2-(2'-Hydroxy-5-hydroxyethylphenyl)-2H-benzotriazole; 2-(2'-Hydroxy-5'-hydroxyethylphenyl)-5-chloro-2H-benzotriazole 2-(2'-Hydroxy-5'-hydroxypropylphenyl)-2H-benzotriazole; 2-(2'-Hydroxy-5'-hydroxypropylphenyl)-5-chloro-2H-benzotriazole; 2-(2'-Hydroxy-5'-hydroxypropyl-3'-tert-butylphenyl)-2H-benzotriazole; or 2-(2'-Hydroxy-5:-hydroxypropyl-3'-tert-butylphenyl)-5-chloro-2H-benzotriazole.
References Cited (Backward Citations)
No citation records indexed.
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