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US4048034A
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US
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Photopolymerization using an alpha-aminoacetophenone
Assignee: Honeywell UOP LLC
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Filing: 1976-08-27
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Granted: 1977-09-13
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Expires: 1996-08-27
Abstract
Abstract Polymerizable monomers are photopolymerized by subjecting the monomer to the emission from an ultra-violet light source in the presence of a photosensitizing compound and an activating compound .It has now been discovered that certain types of substituted acetophenones will act as both a sensitizer and an activator thus eliminating the presence of more than one compound in the monomer.
Inventors
- 👤 Michael Martan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:53
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
61 words
In a process for the photopolymerization of a polymerizable monomer wherein said monomer is subjected to the emission from an ultra-violet light source having a wave length less than about 4000 Angstroms in the presence of a photosensitizing compound and an activating compound at polymerization conditions, the improvement which comprises utilizing an alpha-aminoacetophenone as combined photosensitizing compound and an activating compound.
Claim 2
Dependent Claim
61 words
In a process for the photopolymerization of a polymerizable monomer wherein said monomer is subjected to the emission from an ultra-violet light source having a wave length less than about 4000 Angstroms in the presence of a photosensitizing compound and an activating compound at polymerization conditions, the improvement which comprises utilizing an alpha-aminoacetophenone as combined photosensitizing compound and an activating compound.
Claim 3
Dependent Claim
41 words
The process as set forth in claim 1 in which said polymerization conditions include a temperature in the range of from about ambient to about 100° C. and a pressure in the range of from about atmospheric to about 100 atmospheres.
Claim 4
Dependent Claim
16 words
The process as set forth in claim 1 in which said polymerizable monomer is methyl methacrylate.
Claim 5
Dependent Claim
16 words
The process as set forth in claim 1 in which said polymerizable monomer is methyl acrylate.
Claim 6
Dependent Claim
15 words
The process as set forth in claim 1 in which said polymerizable monomer is styrene.
Claim 7
Dependent Claim
14 words
The process as set forth in claim 1 in which said alpha-aminoacetophenone is alpha-diethylaminoacetophenone.
Claim 8
Dependent Claim
14 words
The process as set forth in claim 1 in which said alpha-aminoacetophenone is alpha-dimethylaminoacetophenone.
Claim 9
Dependent Claim
14 words
The process as set forth in claim 1 in which said alpha-aminoacetophenone is alpha-diethylamino-p-chloroacetophenone.
Claim 10
Dependent Claim
14 words
The process as set forth in claim 1 in which said alpha-aminoacetophenone is alpha-diethylamino-p-bromoacetophenone.
Claim 11
Dependent Claim
14 words
The process as set forth in claim 1 in which said alpha-aminoacetophenone is alpha-dimethylamino-p-bromoacetophenone.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |