Patent US2049569A successfully refreshed from Google Patents.
Patent US4043887A successfully refreshed from Google Patents.
US4043887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzophenone initiators for the photopolymerization of unsaturated compounds
Assignee: Eastman Kodak Co
•
Filing: 1977-01-17
•
Granted: 1977-08-23
•
Expires: 1997-01-17
Abstract
Abstract This invention relates to 3,4-bis(halomethyl) benzophenone photoinitiators and these initiators admixed with unsaturated photopolymerizable compounds. When such compositions are irradiated by ultraviolet light, the benzophenone derivatives split off free radicals which initiate the photopolymerization of the unsaturated photopolymerizable compounds.
Inventors
- 👤 James G. Pacifici
- 👤 Richard H. S. Wang
- 👤 Gordon C. Newland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/029; G03F7/0295; C; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C45/61; C07C45/63; C07C49/00; C07C49/76; C07C49/782; C07C49/784; C07C49/80; C07C49/813; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/117; Y10S430/124; Y10S430/126
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
A composition comprising a photopolymerizable ethylenically unsaturated compound having admixed therewith, as a photo-polymerization initiator, about 0.1 to about 10% by weight, based on the weight of the unsaturated compound, of at least one benzophenone derivative of the formula ##STR6## wherein R is hydrogen, chloro, methoxycarbonyl, methyl, t-butyl, and R 1 and R 2 are the same or different and each is -CH 2 X, CHX 2 , or CX 3 wherein X is chloro or bromo.
Claim 2
Dependent Claim
77 words
A composition comprising a photopolymerizable ethylenically unsaturated compound having admixed therewith, as a photo-polymerization initiator, about 0.1 to about 10% by weight, based on the weight of the unsaturated compound, of at least one benzophenone derivative of the formula ##STR6## wherein R is hydrogen, chloro, methoxycarbonyl, methyl, t-butyl, and R 1 and R 2 are the same or different and each is -CH 2 X, CHX 2 , or CX 3 wherein X is chloro or bromo.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein R is hydrogen or chloro: and each R 1 is CH 2 Cl.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein R is hydrogen; R 1 is CHCl 2 ; and R 2 is CHCl 2 .
References Cited (Backward Citations)
US3686084A
Cited
US3988228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |