Patent US3499527A successfully refreshed from Google Patents.
US4602076A
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US
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Photopolymerizable compositions
Assignee: Syngenta Ltd
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Filing: 1985-09-05
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Granted: 1986-07-22
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Expires: 2005-09-05
Abstract
Abstract A photopolymerizable composition which comprises at least one ethylenically unsaturated polymerizable monomer, at least one selected ketone and at least one organic peroxide. The compositions are useful in the preparation of adhesives, paints and varnishes particularly in dental applications and exhibit reduced air inhibition on being cured by visible radiation in the range 400 mμ to 500 mμ.
Inventors
- 👤 Maurice J. Ratcliffe
- 👤 Derek J. Shaw
- 👤 Peter A. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; C09; C09D; C09D4/00; C09J; C09J4/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
A photopolymerisable composition which comprises at least one ethylenically unsaturated polymerisable monomer, at least one ketone selected from fluorenone and comphorquinone and their substituted derivatives and at least one organic peroxide, said composition being characterized by its improved cure on irradiation with visible light at ambient temperature and in the presence of air.
Claim 2
Dependent Claim
53 words
A photopolymerisable composition which comprises at least one ethylenically unsaturated polymerisable monomer, at least one ketone selected from fluorenone and comphorquinone and their substituted derivatives and at least one organic peroxide, said composition being characterized by its improved cure on irradiation with visible light at ambient temperature and in the presence of air.
Claim 3
Dependent Claim
72 words
A photopolymerisable composition which comprises at least one ethylenically unsaturated polymerisable monomer, at least one ketone selected from fluorenone, benzil and camphorquinone and their substituted derivatives, at least one reducing agent capable of reducing the ketone when the latter is in an excited state and at least one organic peroxide, said composition being characterized by its improved cure on irradiation with visible light at ambient temperature and in the presence of air.
Claim 4
Dependent Claim
72 words
A photopolymerisable composition which comprises at least one ethylenically unsaturated polymerisable monomer, at least one ketone selected from fluorenone, benzil and camphorquinone and their substituted derivatives, at least one reducing agent capable of reducing the ketone when the latter is in an excited state and at least one organic peroxide, said composition being characterized by its improved cure on irradiation with visible light at ambient temperature and in the presence of air.
Claim 5
Dependent Claim
25 words
A photopolymerisable composition according to claim 2 in which the reducing agent concentration is in the range 0.01% to 2% by weight of the composition.
Claim 6
Dependent Claim
108 words
A photopolymerisable composition according to claim 2 in which the reducing agent is an organic amine having the formula R 4 3 N where the grouos R 4 , which may be the same or different, are hydrogen atoms, hydrocarbyl groups, substituted hydrocarbyl groups or groups in which two units R 4 together with the nitrogen atom form a cyclic ring system, no more than two of the units R 4 being hydrogen atoms and where the nitrogen atom is attached directly to an R 4 group which is aromatic, at least one of the other units R 4 has a ##STR3## group attached to the nitrogen atom.
Claim 7
Dependent Claim
22 words
A photopolymerisable composition according to either claim 1 or 2 in which the ethylenically unsaturated polymerisable monomer comprises a diacrylate or dimethacrylate.
Claim 8
Dependent Claim
27 words
A photopolymerisable composition according to either claim 1 or 2 in which the ketone concentration is in the range 0.01% to 2% by weight of the composition.
Claim 9
Dependent Claim
28 words
A photopolymerisable composition according to either claim 1 or 2 in which the organic peroxide concentration is in the range 0.1% to 20% by weight of the composition.
Claim 10
Dependent Claim
27 words
A photopolymerisable composition according to either claim 1 or 2 in which the organic peroxide has a ten hour half life temperature of less than 150° C.
Claim 11
Dependent Claim
16 words
A photopolymerisable composition according to either claim 1 or 2 in which the ketone is camphorquinone.
Claim 12
Dependent Claim
15 words
A photopolymerisable composition according to claim 9 in which the organic peroxide is tertiarybutyl perbenzoate.
Claim 13
Dependent Claim
85 words
A photopolymerisable composition which comprises at least one ethylenically unsaturated polymerisable monomer, at least one ketone selected from fluorenone and camphorquinone and their substituted derivatives, said ketone concentration is in the range 0.10% to 2% by weight of the composition, and at least one organic peroxide, said organic peroxide concentration is in the range of 0.1% to 20% by weight of the composition, said composition being characterized by its improved cure on a radiation with visible light at ambient temperature in the presence of air.
Claim 14
Dependent Claim
85 words
A photopolymerisable composition which comprises at least one ethylenically unsaturated polymerisable monomer, at least one ketone selected from fluorenone and camphorquinone and their substituted derivatives, said ketone concentration is in the range 0.10% to 2% by weight of the composition, and at least one organic peroxide, said organic peroxide concentration is in the range of 0.1% to 20% by weight of the composition, said composition being characterized by its improved cure on a radiation with visible light at ambient temperature in the presence of air.
References Cited (Backward Citations)
GB1304112A
Cited
US4243578A
Cited
US4328325A
Cited
US4323591A
Cited
US4351853A
Cited
US4347174A
Cited
US4504231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |