US4912185A
Expired / Lapsed
US
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Cross-linkable casting compositions
Assignee: Sola International Inc
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Filing: 1987-11-23
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Granted: 1990-03-27
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Expires: 2007-11-23
Abstract
Abstract A cross-linkable polymeric casting composition including at least polyoxyalkylene glycol diacrylate or dimethacrylate and at least one polyfunctional unsaturated cross-linking agent. The casting composition may be utilized in the manufacture of plastic optical articles such as video discs and ophthalmic lenses.
Inventors
- 👤 Huan K. Toh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:23
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/022; C08F299/024; C08F222/00; C08F222/10; C08F222/1006; C08F222/102; G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
60 words
A cross-linkable polymeric casting composition comprising: (A) at least polyoxyalkylene glycol diacrylate or dimethacrylate compound; (B) at least one polyfunctional unsaturated cross-linking agent; and (C) a urethane monomer having from two to six terminal acrylic and/or methacrylic groups; wherein a weight ratio of said cross-linking agent to said urethane monomer is in the range of from approximately 1:4 to 2:1.
Claim 2
Dependent Claim
60 words
A cross-linkable polymeric casting composition comprising: (A) at least polyoxyalkylene glycol diacrylate or dimethacrylate compound; (B) at least one polyfunctional unsaturated cross-linking agent; and (C) a urethane monomer having from two to six terminal acrylic and/or methacrylic groups; wherein a weight ratio of said cross-linking agent to said urethane monomer is in the range of from approximately 1:4 to 2:1.
Claim 3
Dependent Claim
24 words
A casting composition according to claim 1 wherein the diacrylate or dimethacrylate compound includes ethylene oxide or propylene oxide repeating units in its backbone.
Claim 4
Dependent Claim
26 words
A casting composition according to claim 2 wherein the diacrylate or dimethacrylate compound includes approximately 6 to 20 ethylene oxide repeating units in the backbone thereof.
Claim 5
Dependent Claim
28 words
A casting composition according to claim 3 wherein the diacrylate or dimethacrylate compound is a polyethylene glycol dimethacrylate with an average molecular weight of the order of 600.
Claim 6
Dependent Claim
36 words
A casting composition according to claim 2 wherein the diacrylate or dimethacrylate compound is present in amounts of from approximately 40% by weight to 60% by weight based on the total weight of the casting composition.
Claim 7
Dependent Claim
16 words
A casting composition according to claim 1 wherein the urethane monomer is a tetracrylic urethane monomer.
Claim 8
Dependent Claim
23 words
A casting composition according to claim 1 wherein the polyfunctional unsaturated cross-linking agent is a tri- or tetrafunctional vinyl, acrylic or methacrylic monomer.
Claim 9
Dependent Claim
24 words
A casting composition according to claim 7 wherein the polyfunctional unsaturated cross-linking agent is selected from trimethylol propane trimethacrylate, pentarethritol triacrylate or pentarethritol tetracrylate.
Claim 10
Dependent Claim
33 words
A casting composition according to claim 8 wherein the polyfunctional unsaturated cross-linking agent is present in amounts from approximately 10 to 30% by weight based on the total weight of the casting composition.
Claim 11
Dependent Claim
70 words
A casting composition according to claim 6 wherein the urethane monomer is a tetracyclic urethane monomer of the formula ##STR6## wherein R, R 1 , R 2 and R 3 which may be the same or different are selected form hydrogen, alkyl of 1 to 6 carbon atoms or a substituted alkyl of 1 to 6 carbon atoms; and X is an organic residue having 1 to 20 carbon atoms.
Claim 12
Dependent Claim
46 words
A casting composition according to claim 10 wherein X is selected from C 1 -C 20 alkyl, alkoxy, alkylamino, alkyl carbonyl alkoxy carbonyl, alkylamido or alkoxy amide group; which may be substituted or unsubstituted with one or more halogen, hydroxyl, nitro, amino, alkyl or alkoxy groups.
Claim 13
Dependent Claim
33 words
A casting composition according to claim 11 wherein the tetracrylic urethane monomer is present in amounts of from 10 to approximately 40% by weight based on the total weight of the casting composition.
Claim 14
Dependent Claim
45 words
A casting composition according to claim 12 wherein the urethane monomer is a compound of the formula ##STR7## wherein R is a hydrogen atom or a methyl group or a substituted methyl group and X is an organic residue having 2 to 20 carbon atoms.
Claim 15
Dependent Claim
15 words
A casting composition according to claim 1 further including a heat and/or ultraviolet cross-linking initiator.
Claim 16
Dependent Claim
24 words
A casting composition according to claim 14 wherein the cross-linking initiator is selected from Irgacure 184; 1,1 di-tert butyl peroxy-3,3,5-trimethylcyclohexane or secondary isopropyl percarbonate.
Claim 17
Dependent Claim
14 words
A polymeric article formed from a cross-linkable polymeric casting composition according to claim 1.
References Cited (Backward Citations)
US4049634A
Cited
GB1453429A
Cited
US4081308A
Cited
US4214026A
Cited
US4351922A
Cited
DE3117006A1
Cited
US4347174A
Cited
US4387157A
Cited
US4421840A
Cited
US4382135A
Cited
US4414278A
Cited
US4536267A
Cited
US4606994A
Cited
US4533710A
Cited
EP0168226A2
Cited
GB2163443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |