US4080382A
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Haloalkyl benzophenone compounds suitable for use as initiators for photopolymerization
Assignee: Eastman Chemical Co
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Filing: 1977-06-06
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Granted: 1978-03-21
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Expires: 1997-06-06
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
2026-10-26 14:13
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
42 words
Composition having the formula ##STR6## wherein R is hydrogen, chloro, methyl, t-butyl or methoxycarbonyl; 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
42 words
Composition having the formula ##STR6## wherein R is hydrogen, chloro, methyl, t-butyl or methoxycarbonyl; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |