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US4579806A
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Positive-working photosensitive recording materials
Assignee: BASF SE
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Filing: 1984-08-30
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Granted: 1986-04-01
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Expires: 2004-08-30
Abstract
Abstract A curable photosensitive mixture which is suitable as a positive-working recording material contains (a) one or more polymers which have a molecular weight of >500, contain not less than 5% by weight, based on the molecular weight of the polymer, of aromatic and/or heteroaromatic o-nitrocarbinol ester groups and also contain two or more further reactive functional groups which are available for reaction with a thermal crosslinking agent, (b) one or more compounds which effect crosslinking and are capable of reacting with the further reactive functional groups of the polymer (a) under the action of heat, at temperatures substantially above room temperature, and (c) a filler, with or without (d) other conventional additives and/or assistants. The photosensitive mixture is particularly useful as a positive-working recording material for optical information fixing, principally for the production of thermally stable relief images or resist images and, particularly advantageously, of soldering masks.
Inventors
- 👤 Hans Schupp
- 👤 Albert Elzer
- 👤 Klaus-Peter Jaeckel
- 👤 Reinhold J. Leyrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:22
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/38; G03F7/004; G03F7/0045; G03F7/039
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
A curable photosensitive mixture which is suitable as a positive-working recording material and comprises (a) one or more copolymers (a) having a molecular weight>500 and containing (1) at least 5% by weight, based on the weight of the copolymer (a), of a comonomer containing aromatic and/or heteroaromatic o-nitrocarbinol ester groups and (2) comonomer units containing functional groups which are available for crosslinking by thermal reaction; (b) one or more compounds which effect crosslinking and are capable of reacting with the reactive functional groups of the comonomer units (2) of the copolymer (a) under the action of heat, at temperatures, above 50° C. and (c) one or more fillers.
Claim 2
Dependent Claim
108 words
A curable photosensitive mixture which is suitable as a positive-working recording material and comprises (a) one or more copolymers (a) having a molecular weight>500 and containing (1) at least 5% by weight, based on the weight of the copolymer (a), of a comonomer containing aromatic and/or heteroaromatic o-nitrocarbinol ester groups and (2) comonomer units containing functional groups which are available for crosslinking by thermal reaction; (b) one or more compounds which effect crosslinking and are capable of reacting with the reactive functional groups of the comonomer units (2) of the copolymer (a) under the action of heat, at temperatures, above 50° C. and (c) one or more fillers.
Claim 3
Dependent Claim
32 words
A photosensitive mixture as defined in claim 1, wherein the comonomer units of units (2) the copolymer (a), contain as reactive functional groups, hydroxyl, amine, amide, N-methylolamide, epoxide and/or blocked isocyanate groups.
Claim 4
Dependent Claim
38 words
A photosensitive mixture as defined in claim 1, wherein the compound (b) which effects crosslinking is a low molecular weight or high molecular weight compound containing two or more epoxide, blocked isocyanate, amide, N-methylolamide, hydroxyl and/or amine groups.
Claim 5
Dependent Claim
39 words
A photosensitive mixture as defined in claim 1, wherein the comonomer units (2) of the copolymer (a), contain as functional groups, hydroxyl, amine or N-methylolamide groups, and the compound (b) which effects crosslinking is a a di- or polyepoxide.
Claim 6
Dependent Claim
40 words
A photosensitive mixture as defined in claim 1, wherein the comonomer units (2) of the copolymer (a), contain as further functional groups, hydroxyl, amine or N-methylolamide groups, and the compound (b) which effects crosslinking is a blocked di- or polyisocyanate.
Claim 7
Dependent Claim
45 words
A photosensitive mixture as defined in claim 1, wherein the comonomer units (2) of the copolymer (a), contain as further reactive functional groups, amide or N-methylolamide groups, and the compound (b) which effects crosslinking is a melamine/formaldehyde resin, a urea/formaldehyde resin or a phenol/formaldehyde resin.
Claim 8
Dependent Claim
17 words
A photosensitive mixture as defined in claim 1, containing further additives and/or assistants as additional component (d).
Claim 9
Dependent Claim
27 words
A photosensitive mixture as defined in claim 7, containing, as compound (d), a heat-activated catalyst for the thermal curing and crosslinking of the components (a) and (b).
Claim 10
Dependent Claim
41 words
A photosensitive mixture as defined in claim 1, wherein the polymer (a) is a copolymer of an olefinically unsaturated carboxylic acid, esterified with aromatic and/or heteroaromatic o-nitrocarbinols, and olefinically unsaturated monomers containing further reactive functional groups, with or without other comonomers.
Claim 11
Dependent Claim
44 words
A photosensitive mixture as defined in claim 9, wherein the copolymer (a) is a copolymer of acrylic or methacrylic acid, esterified with aromatic and/or heteroaromatic o-nitrocarbinols, and acrylyl or methacrylyl compounds possessing the functional groups available for thermal crosslinking, with or without other comonomers.
Claim 12
Dependent Claim
40 words
A positive-working recording material for the production of thermally stable relief images, relief plates or resist images, having a curable photosensitive layer applied onto a dimensionally stable base, wherein the said layer comprises a mixture as claimed in claim 1.
Claim 13
Dependent Claim
29 words
A photosensitive mixture as defined in claim 1, wherein the copolymer (a) contains from 10 to 30% by weight of the comonomer containing aromatic and/or heteroaromatic o-nitrocarbinol ester groups.
Claim 14
Dependent Claim
43 words
A photosensitive mixture as defined in claim 12, wherein the copolymer (a) contains from 5 to 50% by weight of comonomer units containing functional groups which are available for crosslinking by thermal reaction plus from 20 to 85% by weight of further comonomers.
Claim 15
Dependent Claim
21 words
A photosensitive mixture as defined in claim 1, wherein the copolymer (a) has a molecular weight of from 10,000 to 100,000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |