EP0090493A2
Expired / Lapsed
EP
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Photopolymerisable compositions
Assignee: Syngenta Ltd
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Filing: 1983-02-22
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Granted: —
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Expires: 2003-02-22
Abstract
Abstract A photopolymerisable composition which comprises at least one ethylenically unsaturated polymerisable 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 James Ratcliffe
- 👤 Derek Joseph Shaw
- 👤 Peter Anthony Robinson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
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: 15
Claim 1
Independent Claim
31 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 and at least one organic peroxide.
Claim 2
Dependent Claim
31 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 and at least one organic peroxide.
Claim 3
Dependent Claim
50 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.
Claim 4
Dependent Claim
50 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.
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
107 words
A photopolymerisable composition according to either claim 2 or claim 3 in which the reducing agent is an organic amine having the formula R gN where the groups 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 R 4 is attached directly to an aromatic group R 4 , at least one of the other units R 4 has a group attached to the nitrogen atom.
Claim 7
Dependent Claim
24 words
A photopolymerisable composition according to any one of claims 1 to 4 in which the ethylenically unsaturated polymerisable monomer comprises a diacrylate or dimethacrylate.
Claim 8
Dependent Claim
29 words
A photopolymerisable composition according to any one of claims 1 to 5 in which the ketone concentration is in the range 0.01% to 2% by weight of the composition.
Claim 9
Dependent Claim
30 words
A photopolymerisable composition according to any one of claims 1 to 6 in which the organic peroxide concentration is in the range 0.1% to 20% by weight of the composition.
Claim 10
Dependent Claim
28 words
A photopolymerisable composition according to any one of claims 1 to 7 in which the organic peroxide has a ten hour half life temperature of less than 150°C.
Claim 11
Dependent Claim
18 words
A photopolymerisable composition according to any one of claims 1 to 8 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
40 words
ll. A method for the preparation of a photopolymerisable composition according to any one of claims 1 to 10 which comprises mixing the components in the substantial absence of light having wavelength in the range 400 mµ to 500 mµ.
Claim 14
Dependent Claim
12 words
A photopolymerisable composition whenever produced by the method claimed in claim 11.
Claim 15
Independent Claim
40 words
A method for producing a cured article which comprises the step of irradiating a composition as claimed in any one of claims 1 to 10 and 12 with visible light having wavelength in the range 400 mu to 500 mu.
References Cited (Backward Citations)
No citation records indexed.
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