US4162274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinkable urethane resins containing vinyl and carboxyl groups
Assignee: Bayer AG
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Filing: 1976-12-10
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Granted: 1979-07-24
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Expires: 1996-12-10
Abstract
Abstract A crosslinkable, especially photopolymerizable urethane resin soluble in organic solvent, suitable as starting materials for photoresist lacquers and for the production of photopolymer printing plates comprising a reaction product of a polyepoxide having more than one 1,2-epoxide group per molecule with acrylic and/or methacrylic acid so that from 60 to 100 mole % of the 1,2-epoxide groups are converted into β-hydroxy acrylic or methacrylic ester groups; 30 to 90 mole % of said β-hydroxy ester groups having been reacted with an isocyanate and subsequently 10 to 70 mole % of said β-hydroxy ester groups having been converted into acid semiester groups with a cyclic dicarboxylic acid anhydride.
Inventors
- 👤 Hans J. Rosenkranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/831; C08G18/28; C08G18/67; C08G18/6705; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/117
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A product produced by the steps of reacting (a) a polyepoxide having more than one 1,2-epoxide group per molecule with at least one unsaturated acid selected from the group consisting of acrylic acid and methacrylic acid until 60 to 100 mol% of the 1,2-epoxide groups are converted into β-hydroxy acrylic or methacrylic acid ester groups, (b) reacting 30 to 90 mol% of the hydroxy groups of said β-hydroxy ester groups with an isocyanate to form urethane groups and (c) reacting 10 to 70 mol% of the hydroxy groups of said β-hydroxy ester groups with a cyclic dicarboxylic acid anhydride to form acid semiester groups.
Claim 2
Dependent Claim
104 words
A product produced by the steps of reacting (a) a polyepoxide having more than one 1,2-epoxide group per molecule with at least one unsaturated acid selected from the group consisting of acrylic acid and methacrylic acid until 60 to 100 mol% of the 1,2-epoxide groups are converted into β-hydroxy acrylic or methacrylic acid ester groups, (b) reacting 30 to 90 mol% of the hydroxy groups of said β-hydroxy ester groups with an isocyanate to form urethane groups and (c) reacting 10 to 70 mol% of the hydroxy groups of said β-hydroxy ester groups with a cyclic dicarboxylic acid anhydride to form acid semiester groups.
Claim 3
Dependent Claim
17 words
The reaction product of claim 1 wherein said polyepoxide is a polyglycidyl ether of a polyhydric phenol.
Claim 4
Dependent Claim
12 words
The reaction product of claim 2 wherein said isocyanate is a diisocyanate.
Claim 5
Dependent Claim
33 words
The reaction product of claim 3 wherein said cyclic dicarboxylic acid anhydride is at least one member selected from the group consisting of the anhydrides of succinic acid, phthalic acid and maleic acid.
Claim 6
Dependent Claim
39 words
The reaction product of claim 1 wherein said polyepoxide is 4,4'-dihydroxy diphenyl dimethyl methane-bis-glycidyl ether, said at least one unsaturated acid is acrylic acid, said isocyanate is toluene diisocyanate and said cyclic dicarboxylic acid anhydride is succinic acid anhydride.
Claim 7
Dependent Claim
65 words
The reaction product of claim 1 wherein 90 to 100 mol% of the 1,2-epoxide groups are converted into β-hydroxy acrylic or methacrylic acid ester groups, 40 to 60 mol% of the hydroxy groups of said β-hydroxy ester groups are reacted with said isocyanate and 40 to 60 mol% of the hydroxy groups of said β-hydroxy ester groups are reacted with said cyclic dicarboxylic acid anhydride.
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) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |