Patent US4277974A successfully refreshed from Google Patents.
Patent US5145885A successfully refreshed from Google Patents.
US5145885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerizable compositions containing aminoaryl ketone photoinitiators
Assignee: BASF Corp
•
Filing: 1990-11-13
•
Granted: 1992-09-08
•
Expires: 2010-11-13
Abstract
Abstract The photopolymerizable composition described contains A) at least one ethylenically unsaturated photopolymerizable compound, B) a photoinitiator of the formula I ##STR1## and C) a photosensitizer from the group of aromatic carbonyl compounds having a triplet energy of 225-310 kJ/mol, for example xanthones, thioxanthones, coumarins, phthalimides, phenones and the like. Ar is phenyl substituted in the 4-position by a substituted amino group, R 1 and R 2 are alkyl, R 3 and R 4 are alkyl or alkoxyalkyl, or R 3 and R 4 together are 3-oxapentamethylene. Said sensitizers C) raise the activity of said photoinitiators (B) without shortening the shelf life of the mixtures. The photocurable mixtures are used especially as binders for printing inks or paints.
Inventors
- 👤 Godwin Berner
- 👤 Kurt Meier
- 👤 Kurt Dietliker
- 👤 Rinaldo Husler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:21
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
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A photopolymerizable composition which comprises (a) at least one ethylenically unsaturated photopolymerizable compound, and (b) an effective photoinitiating amount of a compound of formula I ##STR16## in which Ar is phenyl substituted in the 4-position by di(C 1 -C 4 -alkyl)amino or morpholino, R 1 and R 2 are independently C 1 -C 4 -alkyl, and R 3 and R 4 are each C 1 -C 4 -alkyl or 2-methoxyethyl, or R 3 and R 4 together with the N-atom to which they are attached are morpholino.
Claim 2
Dependent Claim
87 words
A photopolymerizable composition which comprises (a) at least one ethylenically unsaturated photopolymerizable compound, and (b) an effective photoinitiating amount of a compound of formula I ##STR16## in which Ar is phenyl substituted in the 4-position by di(C 1 -C 4 -alkyl)amino or morpholino, R 1 and R 2 are independently C 1 -C 4 -alkyl, and R 3 and R 4 are each C 1 -C 4 -alkyl or 2-methoxyethyl, or R 3 and R 4 together with the N-atom to which they are attached are morpholino.
Claim 3
Dependent Claim
14 words
A composition according to claim 1 wherein the compound of component (b) is 2-methyl-1-(4-dimethylaminophenyl)-2-dimethylaminopropan-1-one.
Claim 4
Dependent Claim
14 words
A composition according to claim 1 wherein the compound of component (b) is 2-methyl-1-(4-diethylaminophenyl)-2-diethylaminopropan-1-one.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 wherein the compound of component (b) is 2-methyl-1-(4-dimethylaminophenyl)-2-dimethylaminobutan-1-one.
Claim 6
Dependent Claim
14 words
A composition according to claim 1 wherein the compound of component (b) is 2-methyl-1-(4-morpholinophenyl)-2-di(2-methoxyethyl)aminopropan-1-one.
Claim 7
Dependent Claim
14 words
A composition according to claim 1 wherein the compound of component (b) is 2-methyl-1-(4-morpholinophenyl)-2-dimethylaminopropan-1-one.
Claim 8
Dependent Claim
33 words
A process for photopolymerizing an ethylenically unsaturated compound which comprises incorporating therein an effective photoinitiating amount of a compound of formula I according to claim 1, and irradiating said material with actinic light.
References Cited (Backward Citations)
US4318791A
Cited
US4284485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-08 | 1996-03-09 | 1996-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-08 | 2000-03-09 | 2000-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-08 | 2004-03-09 | 2004-09-08 | $7700.00 | Window Closed / Lapsed |