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US4089762A
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Photopolymerizable compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-05-16
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Granted: 1978-05-16
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Expires: 1995-05-16
Abstract
Abstract A photopolymerizable composition comprises a polymerizable ethylenically unsaturated material, a photosensitizer <IMAGE> which is preferably a diketone, e.g. benzil, and a N-alkyl or N-cycloalkylmorpholine.
Inventors
- 👤 Thomas William Gordon Frodsham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:39
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F299/00; C08F299/02; C08F299/04; C08F299/0407; C08F299/0421; C08F299/0428; C08F299/0435
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
A photopolymerisable composition which comprises an ethylenically unsaturated polyester, an ethylenically unsaturated comonomer, and a photosensitive catalyst comprising: (a) at least one photosensitiser which is an alpha-diketone selected from the group consisting of biacetyl, benzil, alpha-naphthil, beta-naphthil, p-tolil, furil, p,p'-dialkoxybenzil, p,p'-dihalobenzil and p-nitrobenzil, and
Claim 2
Dependent Claim
44 words
A photopolymerisable composition which comprises an ethylenically unsaturated polyester, an ethylenically unsaturated comonomer, and a photosensitive catalyst comprising: (a) at least one photosensitiser which is an alpha-diketone selected from the group consisting of biacetyl, benzil, alpha-naphthil, beta-naphthil, p-tolil, furil, p,p'-dialkoxybenzil, p,p'-dihalobenzil and p-nitrobenzil, and
Claim 3
Dependent Claim
10 words
(b) a reducing agent which is a N-alkyl- or N-cycloalkyl-morpholine.
Claim 4
Dependent Claim
10 words
(b) a reducing agent which is a N-alkyl- or N-cycloalkyl-morpholine.
Claim 5
Dependent Claim
28 words
A composition as claimed in claim 1 in which the N-alkyl or N-cycloalkyl morpholine is an N- (C 1 to C 6 ) alkyl morpholine, N-cyclohexylmorpholine or N-methylcyclohexylmorpholine.
Claim 6
Dependent Claim
126 words
A composition as claimed in claim 1 which comprises: (a) 0.001% to 10% by weight of the composition of benzil, (b) 0.1% to 10% by weight of the composition of an N-(C 1 to C 6 alkyl)morpholine, (c) an ethylenically unsaturated polyester formed by the condensation of an ethylenically unsaturated dibasic acid selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, itaconic acid, itaconic acid anhydride, mesaconic acid and citraconic acid with a polyhydric alcohol selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol, tripropylene glycol, glycerol, neopentyl glycol, pentaerythritol, dipentaerythritol, polyethylene glycol and polypropylene glycol, and (d) an ethylenically unsaturated comonomer selected from the group consisting of styrene, alpha-methylstyrene, vinyltoluene, divinylbenzene, diallylphthalate, vinylacetate and methylmethacrylate.
Claim 7
Dependent Claim
37 words
A composition as claimed in claim 3 in which the ethylenically unsaturated polyester is also formed from a dibasic acid selected from the group consisting of orthophthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid and adipic acid.
Claim 8
Dependent Claim
33 words
A process for the preparation of a polymeric material which comprises irradiating a photopolymerisable composition as claimed in claim 1 with radiation having a wavelength in the range 230 mμ to 600 mμ.
Claim 9
Dependent Claim
20 words
A composition as claimed in claim 1 in which the ethylenically unsaturated comonomer comprises a vinyl, allyl or vinylidene monomer.
References Cited (Backward Citations)
GB861429A
Cited
US3450613A
Cited
US3551311A
Cited
US3759807A
Cited
US3864133A
Cited
US3903322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |