US5134053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polymer with unsaturated lateral chains, photosensitive mixture containing said graft polymer and recording material produced therefrom
Assignee: Hoechst AG
•
Filing: 1990-07-27
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Granted: 1992-07-28
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Expires: 2010-07-27
Abstract
Abstract Disclosed is a photocurable mixture which is suited for the production of printing plates, in particular planographic printing plates, and photoresists. The mixture comprises a graft polymer comprised of a polyurethane as the graft backbone and grafted-on chains containing vinyl alcohol units and units with lateral, polymerizable or crosslinkable double bonds, and a photosensitive compound, such as a photoinitiator or a negative-working diazo compound. The printing plates prepared from the mixture are distinguished by high photospeed, good developability with aqueous solutions and long print runs.
Inventors
- 👤 Waltraud Mueller-Hess
- 👤 Dieter Mohr
- 👤 Matthias Kroggel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:22
CPC Classifications
C; C08; C08F; C08F257/00; C08F283/00; C08F283/006; C08F290/00; C08F290/08; C08F290/14; C08F290/147; Y; Y10; Y10S; Y10S525/00; Y10S525/912
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
37 words
A graft polymer comprising a polyurethane as the graft backbone and a plurality of grafted-on chains which comprise units of vinyl alcohol and units having polymerizable or crosslinkable double bonds that are lateral to the grafted-on chain.
Claim 2
Dependent Claim
37 words
A graft polymer comprising a polyurethane as the graft backbone and a plurality of grafted-on chains which comprise units of vinyl alcohol and units having polymerizable or crosslinkable double bonds that are lateral to the grafted-on chain.
Claim 3
Dependent Claim
29 words
A graft polymer as claimed in claim 1, wherein the units with lateral polymerizable or crosslinkable double bonds comprise vinyl ester units, vinyl ether units or vinyl urethane units.
Claim 4
Dependent Claim
18 words
A graft polymer as claimed in claim 1, wherein the grafted-on chains further comprise saturated vinyl ester units.
Claim 5
Dependent Claim
18 words
A graft polymer as claimed in claim 1, wherein the grafted-on chains further comprise saturated vinyl acetal units.
Claim 6
Dependent Claim
21 words
A graft polymer as claimed in claim 4, wherein the vinyl acetal units are derived from an aliphatic or cycloaliphatic aldehyde.
Claim 7
Dependent Claim
26 words
A graft polymer as claimed in claim 1, wherein the grafted-on chains further comprise units of other ethylenically unsaturated monomers which are copolymerizable with vinyl esters.
Claim 8
Dependent Claim
21 words
A graft polymer as claimed in claim 1, wherein the polyurethane comprises a polyaddition product of diisocyanate units and diol units.
Claim 9
Dependent Claim
20 words
A graft polymer as claimed in claim 1, wherein the polyurethane has a molecular weight between about 200 and 100,000.
Claim 10
Dependent Claim
24 words
A graft polymer as claimed in claim 1, wherein the units with lateral polymerizable or crosslinkable double bonds comprise acryloyl radicals or methacryloyl radicals.
Claim 11
Dependent Claim
68 words
A graft polymer as claimed in claim 1 comprising from about 0 to 45 mole % of vinyl ester units, from about 0 to 97 mole % of vinyl alcohol units, from about 0 to 85 mole % of vinyl acetal units and from about 1 to 60 mole % of units with lateral polymerizable or crosslinkable double bonds, relative to the mole number of the grafted-on units.
Claim 12
Dependent Claim
21 words
A photocurable mixture comprising (a) a graft polymer as claimed in claim 1 and (b) at least one negative-working photosensitive compound.
Claim 13
Dependent Claim
39 words
A photocurable mixture as claimed in claim 11, wherein component (b) comprises a photoinitiator compound or combination of compounds, which upon irradiation with actinic light is capable of initiating the polymerization or crosslinking of the ethylenically unsaturated lateral chains.
Claim 14
Dependent Claim
19 words
A photocurable mixture as claimed in claim 12, further comprising (c) a low molecular-weight, ethylenically unsaturated, free-radically polymerizable compound.
Claim 15
Dependent Claim
43 words
A photocurable mixture as claimed in claim 13, comprising from about 20 to 90% by weight of graft polymer (a), about 0.05 to 20% by weight of photoinitiator component (b) and about 0 to 80% by weight of low molecular-weight, polymerizable compound (c).
Claim 16
Dependent Claim
17 words
A photocurable mixture as claimed in claim 11, wherein component (b) comprises a diazonium salt polycondensation product.
Claim 17
Dependent Claim
24 words
A photocurable recording material comprising a layer support and a photosensitive recording layer, wherein said layer comprises a mixture as claimed in claim 11.
Claim 18
Dependent Claim
15 words
A photocurable mixture as claimed in claim 11, wherein component (b) is a diazo compound.
Claim 19
Dependent Claim
15 words
A photocurable mixture as claimed in claim 11, wherein component (b) is an azido compound.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |