US5010155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl-urethane substituted hydroxyethyl cellulose
Assignee: Ciba Vision Corp
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Filing: 1990-03-09
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Granted: 1991-04-23
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Expires: 2010-03-09
Abstract
Abstract Vinyl substituted hydroxyethyl cellulose is obtained by reaction of hydroxyethyl cellulose, either in solution or in dispersion, with a vinyl-unsaturated isocyanate. The vinyl-urethane substituted hydroxyethyl cellulose of this invention can be used to form coatings on a substrate, such as glass, plastic, metal, wood and the like, which can subsequently be crosslinked by conventional UV-curing technology into hydrophilic films. When coated onto a mold, such coatings are especially useful in forming very hydrophilic surfaces on reaction-molded polymer shapes, such as contact lenses.
Inventors
- 👤 Karl F. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:52
CPC Classifications
C; C08; C08J; C08J5/00; B; B29; B29C; B29C41/00; B29C41/003; C08B; C08B15/00; C08B15/05; C08B15/06; C08F; C08F290/00; C08F290/08; C08F290/10; C08F299/00; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
31 words
Vinyl functional hydroxyethyl cellulose, HEC-V, which comprises hydroxyethyl cellulose, HEC, of at least 10000 MW, in which 0.5-5% of the hydroxy groups have been reacted with a vinyl functional isocyanate, V.
Claim 2
Dependent Claim
31 words
Vinyl functional hydroxyethyl cellulose, HEC-V, which comprises hydroxyethyl cellulose, HEC, of at least 10000 MW, in which 0.5-5% of the hydroxy groups have been reacted with a vinyl functional isocyanate, V.
Claim 3
Dependent Claim
55 words
A compound according to claim 1, wherein the vinyl functional isocyanate V is styrene isocyanate, m-isopropenyl-1.1-dimethylbenzyl isocyanate, an isocyanatoalkyl vinyl ether, or an isocyanatoalkyl acrylate or methacrylate of structure CH.sub.2 ═CR.sub.1 --COOR.sub.2 NCO (I) wherein R 1 is hydrogen or methyl and R 2 is a linear or branched alkylene group with 2-10 carbon atoms.
Claim 4
Dependent Claim
34 words
A compound according to claim 2, wherein the vinyl functional isocyanate V is 2-isocyanatoethyl acrylate or methacrylate, 3-isocyanatopropyl acrylate or methacrylate, 4-isocyanatobutyl acrylate or methacrylate, 6-isocyanatohexyl acrylate or methacrylate, 1-methyl-2-isocyanatoethyl methacrylate or 1,1-dimethyl-2-isocyanatoethyl methacrylate.
Claim 5
Dependent Claim
51 words
A compound according to claim 1, where in the vinyl functional hydroxyethyl cellulose HEC-V, HEC is hydroxyethyl cellulose of 15000-3×10 6 MW with a degree of substitution, D.S. of 0.5-3 and a molar degree of substitution, M.S. of 1-10, and the vinyl functional isocyanate V is an isocyanatoalkyl acrylate or methacrylate.
Claim 6
Dependent Claim
40 words
A compound according to claim 4, where in the vinyl functional hydroxyethyl cellulose HEC-V, HEC is of 20000-2×10 6 MW and has a D.S. of 0.8-2 and a M.S. of 1.5-4, and the vinyl functional isocyanate V is 2-isocyanatoethyl methacrylate.
References Cited (Backward Citations)
US4861629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |