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US4144156A
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Manufacture of unsymmetric monoacetals of aromatic 1,2-diketones employable as photoiniatiators
Assignee: BASF Corp
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Filing: 1977-04-14
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Granted: 1979-03-13
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Expires: 1997-04-14
Abstract
Abstract Unsymmetrical monoketals of aromatic 1,2-diketones ##STR1## wherein R 1 and R 2 are different radicals, are manufactured by reacting the corresponding aromatic 1,2-diketones, in an organic solvent, with an acid ester (R 1 ) n X as alkylating agent and an alcoholate (R 2 O) m Me, where n and m are integers from 1 to 3, X is an acid radical and Me is a metal of main groups 1 to 3 of the periodic table of the elements. The resulting diketone monoacetals are particularly suitable for use as photoinitiators in photopolymerizable compositions.
Inventors
- 👤 Werner Kuesters
- 👤 Manfred Jacobi
- 👤 Rolf Osterloh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:53
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F299/00; C08F299/02; C08F299/04; C08F299/0407; C08F299/0421; C08F299/0428; C08F299/0435; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S525/00; Y10S525/922; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31786; Y10T428/3179
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
In a composition photopolymerizable with UV radiation and containing a compound having at least one polymerizable carbon-carbon double bond and further containing a photoinitiator, the improvement which comprises; using as the photoinitiator an unsymmetric monoketal of an aromatic 1,2-diketone of the formula ##STR4## where A 1 and A 2 are identical or different aromatic radicals each of which having from 6 to 12 carbon atoms which are either unsubstituted or which may bear from one of four substituents selected from the group consisting of hydrocarbon radicals having 1 to 10 carbon atoms, alkoxy radicals having 1 to 10 carbon atoms, alkoxyalkyl radicals having 2 to 10 carbon atoms, alkylthio radicals having 1 to 6 carbon atoms and/or halogen and R 1 and R 2 are hydrocarbon radicals of 1 to 12 carbon atoms in which the chain may or may not be interrupted by --O-- or --S-- or bear a halogen, said radicals R 1 and R 2 being characterized in that they differ one from another.
Claim 2
Dependent Claim
167 words
In a composition photopolymerizable with UV radiation and containing a compound having at least one polymerizable carbon-carbon double bond and further containing a photoinitiator, the improvement which comprises; using as the photoinitiator an unsymmetric monoketal of an aromatic 1,2-diketone of the formula ##STR4## where A 1 and A 2 are identical or different aromatic radicals each of which having from 6 to 12 carbon atoms which are either unsubstituted or which may bear from one of four substituents selected from the group consisting of hydrocarbon radicals having 1 to 10 carbon atoms, alkoxy radicals having 1 to 10 carbon atoms, alkoxyalkyl radicals having 2 to 10 carbon atoms, alkylthio radicals having 1 to 6 carbon atoms and/or halogen and R 1 and R 2 are hydrocarbon radicals of 1 to 12 carbon atoms in which the chain may or may not be interrupted by --O-- or --S-- or bear a halogen, said radicals R 1 and R 2 being characterized in that they differ one from another.
Claim 3
Dependent Claim
16 words
A photopolymerizable composition as set forth in claim 1 wherein said photoinitiator is benzil methyl-ethyl monoketal.
Claim 4
Dependent Claim
16 words
A photopolymerizable composition as set forth in claim 1 wherein said photoinitiator is benzil methylbenzyl monoketal.
Claim 5
Dependent Claim
16 words
A photopolymerizable composition as set forth in claim 1 wherein said photoinitiator is benzil methyl-crotyl monoketal.
Claim 6
Dependent Claim
16 words
A photopolymerizable composition as set forth in claim 1 wherein said photoinitiator is benzil methyl-allyl monoketal.
Claim 7
Dependent Claim
17 words
A photopolymerizable composition as set forth in claim 1 wherein said photoinitiator is 4,4'-dimethyl benzil ethyl-β-phenylethyl monoketal.
Claim 8
Dependent Claim
17 words
A photopolymerizable composition as set forth in claim 1 wherein said photoinitiator is 2,2'-dimethoxy benzil allyl-methylthioethyl monoketal.
Claim 9
Dependent Claim
17 words
A photopolymerizable composition as set forth in claim 1 wherein said photoinitiator is 4,4'-diphenyl benzil methyl-methoxyethyl monoketals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |