US4141807A
Expired / Lapsed
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Photopolymerizable composition stabilized with nitrogen-containing aromatic compounds
Assignee: Akzo America Inc
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Filing: 1977-03-01
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Granted: 1979-02-27
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Expires: 1997-03-01
Abstract
Abstract A stabilized photopolymerizable composition comprising photopolymerizable ethylenically unsaturated monomeric compounds, a photoinitiator and at least one nitrogen-containing aromatic compound as a stabilizer.
Inventors
- 👤 Francis A. Via
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:20
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
91 words
A process for preparing a photopolymerizable composition comprising forming a mixture containing a photopolymerizable ethylenically unsaturated compound, a benzoin ether in an amount sufficient to initiate photopolymerization and a stabilizing amount of a stabilizer having the formula: ##STR8## wherein A is carbon or nitrogen; R 3 and R 4 are independently selected hydrogen, hydroxyl, or an alkali metal salt thereof; R 7 and R 8 are independently selected hydrogen, hydroxyl, nitroso or pyridylazo; and Y is nitrogen or carbon, with the proviso that said stabilizer must contain at least one nitrogen.
Claim 2
Dependent Claim
91 words
A process for preparing a photopolymerizable composition comprising forming a mixture containing a photopolymerizable ethylenically unsaturated compound, a benzoin ether in an amount sufficient to initiate photopolymerization and a stabilizing amount of a stabilizer having the formula: ##STR8## wherein A is carbon or nitrogen; R 3 and R 4 are independently selected hydrogen, hydroxyl, or an alkali metal salt thereof; R 7 and R 8 are independently selected hydrogen, hydroxyl, nitroso or pyridylazo; and Y is nitrogen or carbon, with the proviso that said stabilizer must contain at least one nitrogen.
Claim 3
Dependent Claim
47 words
The process of claim 1 wherein said benzoin ether is present in said composition at a concentration of about 0.01 to about 30 percent by weight, and said stabilizer is present at a concentration of about 0.01 to about 30 percent by weight of said benzoin ether.
Claim 4
Dependent Claim
41 words
The process of claim 2 wherein said stabilizer has the formula: ##STR9## where A is carbon or nitrogen; R 3 and R 4 are hydrogen or hydroxyl and R 7 and R 8 are independently selected hydrogen, hydroxyl, nitroso or pyridylazo.
Claim 5
Dependent Claim
16 words
The process of claim 3 wherein R 3 and R 4 in said formula are hydrogen.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein said stabilizer is an hydroxyquinoline.
Claim 7
Dependent Claim
10 words
The process of claim 5 wherein said stabilizer is 8-hydroxyquinoline.
Claim 8
Dependent Claim
12 words
The process of claim 4 wherein said stabilizer is a nitroso naphthol.
Claim 9
Dependent Claim
10 words
The process of claim 7 wherein said stabilizer is 2-nitroso-1-naphthol.
Claim 10
Dependent Claim
10 words
The process of claim 7 wherein said stabilizer is 1-nitroso-2-naphthol.
Claim 11
Dependent Claim
11 words
The process of claim 4 wherein said stabilizer is 1-(2-pyridylazo)-2 naphthol.
Claim 12
Dependent Claim
10 words
The process of claim 1 further including an organic amine.
Claim 13
Dependent Claim
17 words
The process of claim 11 wherein said organic amine is phenyl naphthylamine and said stabilizer is hydroxyquinoline.
Claim 14
Dependent Claim
86 words
A photopolymerizable composition comprising at least one photopolymerizable ethylenically unsaturated compound containing a benzoin ether in an amount sufficient to initiate photopolymerization and a stabilizing amount of a stabilizer having the formula: ##STR10## wherein A is carbon or nitrogen; R 3 and R 4 are independently selected hydrogen, hydroxyl, or an alkali metal salt thereof; R 7 and R 8 are independently selected hydrogen, hydroxyl, nitroso or pyridylazo; and Y is nitrogen or carbon, with the proviso that said stabilizer must contain at least one nitrogen.
Claim 15
Dependent Claim
86 words
A photopolymerizable composition comprising at least one photopolymerizable ethylenically unsaturated compound containing a benzoin ether in an amount sufficient to initiate photopolymerization and a stabilizing amount of a stabilizer having the formula: ##STR10## wherein A is carbon or nitrogen; R 3 and R 4 are independently selected hydrogen, hydroxyl, or an alkali metal salt thereof; R 7 and R 8 are independently selected hydrogen, hydroxyl, nitroso or pyridylazo; and Y is nitrogen or carbon, with the proviso that said stabilizer must contain at least one nitrogen.
Claim 16
Dependent Claim
47 words
The composition of claim 13 wherein said benzoin ether is present in said composition at a concentration of about 0.01 to about 30 percent by weight, and said stabilizer is present at a concentration of about 0.01 to about 20 percent by weight of said benzoin ether.
Claim 17
Dependent Claim
41 words
The composition of claim 14 wherein said stabilizer has the formula: ##STR11## where A is carbon or nitrogen; R 3 and R 4 are hydrogen or hydroxyl and R 7 and R 8 are independently selected hydrogen, hydroxyl, nitroso or pyridylazo.
Claim 18
Dependent Claim
16 words
The composition of claim 15 wherein R 3 and R 4 in said formula are hydrogen.
Claim 19
Dependent Claim
11 words
The composition of claim 16 wherein said stabilizer is an hydroxyquinoline.
Claim 20
Dependent Claim
10 words
The composition of claim 17 wherein said stabilizer is 8-hydroxyquinoline.
Claim 21
Dependent Claim
12 words
The composition of claim 18 wherein said stabilizer is a nitroso naphthol.
Claim 22
Dependent Claim
11 words
The composition of claim 19 wherein said stabilizer is 2 nitroso-1-naphthol.
Claim 23
Dependent Claim
11 words
The composition of claim 19 wherein said stabilizer is 1 nitroso-2-naphthol.
Claim 24
Dependent Claim
11 words
The composition of claim 16 wherein said stabilizer is 1-(2-pyridylazo)-2 naphthol.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |