Patent US4459193A successfully refreshed from Google Patents.
US4459193A
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US
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Dental compositions containing camphorquinone and organic peroxide as catalyst
Assignee: Syngenta Ltd
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Filing: 1982-03-04
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Granted: 1984-07-10
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Expires: 2002-03-04
Abstract
Abstract A visible light cure fluid dental composition which comprises at least one polymerizable ethylenically unsaturated material, from 40% to 90% by weight of the composition of at least one particulate filler, and a catalyst which comprises at least one ketone having photosensitive catalytic action selected from fluorenone and alpha -diketones and their derivatives, and at least one organic peroxide, and a method for their preparation and use.
Inventors
- 👤 Maurice J. Ratcliffe
- 👤 Derek J. Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:52
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
43 words
A visible light cure fluid dental composition which comprises at least one polymerisable ethylenically unsaturated material, from 40% to 90% by weight of the composition of at least one particulate filler, and a catalyst which comprises camphorquinone and at least one organic peroxide.
Claim 2
Dependent Claim
43 words
A visible light cure fluid dental composition which comprises at least one polymerisable ethylenically unsaturated material, from 40% to 90% by weight of the composition of at least one particulate filler, and a catalyst which comprises camphorquinone and at least one organic peroxide.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 in which the concentration of camphorquinone is from 0.01% to 2% by weight of polymerisable material.
Claim 4
Dependent Claim
23 words
A composition according to claim 1 in which the concentration of organic peroxide is from 0.1% to 20% by weight of polymerisable material.
Claim 5
Dependent Claim
56 words
A composition according to claim 1 in which the organic peroxide has a ten hour half life temperature of less than 150° C. and has the formula R--O--O--R in which the groups R which may be the same or different are hydrogen, alkyl, aryl or acyl groups, no more than one of the groups being hydrogen.
Claim 6
Dependent Claim
15 words
A composition according to claim 4 in which the organic peroxide is tertiary butyl perbenzoate.
Claim 7
Dependent Claim
26 words
A composition according to claim 1 which includes a reducing agent which is capable of reducing the camphorquinone when the latter is in an excited state.
Claim 8
Dependent Claim
108 words
A composition according to claim 6 in which the reducing agent is an organic amine which has the formula R 4 3 N 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 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 ##STR8## group attached to the nitrogen atom.
Claim 9
Independent Claim
66 words
A method of curing a visible light cure fluid dental composition which comprises at least one polymerisable ethylenically unsaturated material, from 40% to 90% by weight of the composition of at least one particulate filler, and a catalyst which comprises camphorquinone, and at least one organic peroxide which comprises irradiating the composition with visible light having a wavelength in the range 400 mμ to 500 mμ.
Claim 10
Independent Claim
66 words
A method of curing a visible light cure fluid dental composition which comprises at least one polymerisable ethylenically unsaturated material, from 40% to 90% by weight of the composition of at least one particulate filler, and a catalyst which comprises camphorquinone, and at least one organic peroxide which comprises irradiating the composition with visible light having a wavelength in the range 400 mμ to 500 mμ.
Claim 11
Dependent Claim
22 words
A method according to claim 8 in which the concentration of camphorquinone is from 0.01% to 2% by weight of polymerisable material.
Claim 12
Dependent Claim
23 words
A method according to claim 8 in which the concentration of organic peroxide is from 0.1% to 20% by weight of polymerisable material.
Claim 13
Dependent Claim
56 words
A method according to claim 8 in which the organic peroxide has a ten hour half life temperature of less than 150° C. and has the formula R--O--O--R in which the groups R which may be the same or different are hydrogen, alkyl, aryl or acyl groups, no more than one of the groups being hydrogen.
Claim 14
Dependent Claim
15 words
A method according to claim 11 in which the organic peroxide is tertiary butyl perbenzoate.
Claim 15
Dependent Claim
26 words
A method according to claim 8 which includes a reducing agent which is capable of reducing the camphorquinone when the latter is in an excited state.
Claim 16
Dependent Claim
108 words
A method according to claim 13 in which the reducing agent is an organic amine which has a formula R 4 3 N 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 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 ##STR9## group attached to the nitrogen atom.
Claim 17
Dependent Claim
79 words
In a method of curing a visible light cure fluid dental composition which comprises at least one polymerisable ethylenically unsaturated material, from 40-90% by weight of the composition of at least one particulate filler, and a light sensitive catalyst, the improvements which comprise using as the catalyst camphorquinone, and at least one organic peroxide and irradiating the composition with visible light having a wave length in the range 400 mμ-500 mμ, whereby the composition has improved depth of cure.
Claim 18
Dependent Claim
79 words
In a method of curing a visible light cure fluid dental composition which comprises at least one polymerisable ethylenically unsaturated material, from 40-90% by weight of the composition of at least one particulate filler, and a light sensitive catalyst, the improvements which comprise using as the catalyst camphorquinone, and at least one organic peroxide and irradiating the composition with visible light having a wave length in the range 400 mμ-500 mμ, whereby the composition has improved depth of cure.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |