US4469774A
Expired / Lapsed
US
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Positive-working photosensitive benzoin esters
Assignee: EIDP Inc
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Filing: 1983-03-28
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Granted: 1984-09-04
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Expires: 2003-03-28
Abstract
Abstract Photosensitive polymeric esters of alkoxybenzoin as defined which upon exposure become soluble in alkaline developers. The positive-working polymeric compounds are used as contact litho films, lithographic and relief printing plates and photoresists.
Inventors
- 👤 Ross A. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:11
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/30; G; G03; G03F; G03F7/00; G03F7/004; G03F7/039; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
164 words
A photosensitive positive-working polymer consisting essentially of repeating units A, B and C wherein ##STR5## in the proportion mA, nB and pC wherein m, n and p are the average integral frequencies of their respective monomeric constituents and have values in the range of 1 to 800, 0 to 800 and 0 to 800, respectively, with the proviso that the total of m, n and p ranges from 2 to 1600; R 1 is 3'-methoxy, 3',4'-dimethoxy or 3',5'-dimethoxy; R 2 is 3-methoxy, 3,4-dimethoxy, 3,4-benzo or hydrogen; R 3 is hydrogen or methyl; R 4 is COOH, SO 3 H, omega carboxyalkyl of 1 to 4 carbon atoms or carboethoxy monophthalate, β-sulfocarboethoxy; R 5 is hydrogen or methyl; R 6 is hydrogen, methyl or COOH; R 7 is --CN, --COOR 10 where R 10 is alkyl of 1 to 10 carbon atoms, β-hydroxy alkyl where alkyl is of 1 to 4 carbon atoms; R 8 is hydrogen or methyl; R 9 is hydrogen or methyl.
Claim 2
Dependent Claim
164 words
A photosensitive positive-working polymer consisting essentially of repeating units A, B and C wherein ##STR5## in the proportion mA, nB and pC wherein m, n and p are the average integral frequencies of their respective monomeric constituents and have values in the range of 1 to 800, 0 to 800 and 0 to 800, respectively, with the proviso that the total of m, n and p ranges from 2 to 1600; R 1 is 3'-methoxy, 3',4'-dimethoxy or 3',5'-dimethoxy; R 2 is 3-methoxy, 3,4-dimethoxy, 3,4-benzo or hydrogen; R 3 is hydrogen or methyl; R 4 is COOH, SO 3 H, omega carboxyalkyl of 1 to 4 carbon atoms or carboethoxy monophthalate, β-sulfocarboethoxy; R 5 is hydrogen or methyl; R 6 is hydrogen, methyl or COOH; R 7 is --CN, --COOR 10 where R 10 is alkyl of 1 to 10 carbon atoms, β-hydroxy alkyl where alkyl is of 1 to 4 carbon atoms; R 8 is hydrogen or methyl; R 9 is hydrogen or methyl.
Claim 3
Dependent Claim
39 words
A polymeric compound according to claim 1 wherein R 1 is 3',5'-dimethoxy; R 2 , R 3 , R 5 and R 6 are hydrogen, R 4 is carboethoxymono phthalate, m/n is 10 to 0.3 and p is 0.
Claim 4
Dependent Claim
55 words
A polymeric compound according to claim 1 wherein R 1 is 3',4'- dimethoxy; R 2 , R 3 , R 5 and R 6 each are hydrogen, R 4 is carboethoxymono phthalate, m/n is 10 to 0.3 with m and n ranging between 3 and 200 and 1 and 60, respectively, and p is 0.
Claim 5
Dependent Claim
42 words
A polymeric compound according to claim 1 wherein R 1 is 3',5'-dimethoxy; R 2 , R 3 and R 5 each are hydrogen, R 4 is COOH, R 6 is CH 3 , m/n is 10 to 0.3 and p is 0.
Claim 6
Dependent Claim
13 words
A compound according to claim 1 wherein said polymer is copoly(3',5'-dimethoxybenzoin acrylate/2-acryloxyethyl phthalate/acrylonitrile).
Claim 7
Dependent Claim
12 words
A compound according to claim 1 wherein said polymer is poly(3',5'-dimethoxybenzoin acrylate).
Claim 8
Dependent Claim
13 words
A compound according to claim 1 wherein said polymer is copoly(3',5'-dimethoxybenzoin acrylate/acrylic acid).
Claim 9
Dependent Claim
13 words
A compound according to claim 1 wherein said polymer is copoly(3,4-benzo-3',5'-dimethoxybenzoin acrylate/2-acryloxyethyl phthalate).
Claim 10
Dependent Claim
13 words
A compound according to claim 1 wherein said polymer is copoly(3',4'-dimethoxybenzoin acrylate/2-acryloxyethyl phthalate).
Claim 11
Dependent Claim
13 words
A compound according to claim 1 wherein said polymer is copoly(3'-methoxybenzoin acrylate/2-acryloxyethyl phthalate).
Claim 12
Dependent Claim
14 words
A compound according to claim 1 wherein said polymer is copolymer (3,3'-dimethoxybenzoin acrylate/2-acryloxyethyl phthalate).
Claim 13
Dependent Claim
34 words
A positive-working photosensitive element which comprises a support bearing a photosensitive layer consisting essentially of at least one polymeric compound according to claim 1 and optionally a sensitizer, a polymeric binder and/or a plasticizer.
Claim 14
Dependent Claim
16 words
A positive-working photosensitive element according to claim 12 wherein the photosensitive layer contains a xanthone compound.
Claim 15
Dependent Claim
20 words
A positive-working photosensitive element according to claim 12 wherein the photosensitive layer contains 0 to 25% by weight of plasticizer.
Claim 16
Dependent Claim
21 words
A positive-working photosensitive element according to claim 12 wherein the photosensitive layer contains 0 to 80% by weight of polymeric binder.
Claim 17
Dependent Claim
29 words
A positive-working photosensitive element according to claim 15 wherein the polymeric binder is taken from the group of polyepoxide resin, polyacrylate, polymethacrylate, phenol/formaldehyde resins, polyvinyl ethers and mixtures thereof.
Claim 18
Dependent Claim
25 words
A positive-working photosensitive element according to claim 12 wherein the support bearing the photosensitive layer has present thereon a layer of base soluble, carbon black.
References Cited (Backward Citations)
US3849137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |