Patent US4139436A successfully refreshed from Google Patents.
US4139436A
Expired / Lapsed
US
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Polyetherurethane composition and polymer prepared by photopolymerization
Assignee: Goodyear Tire and Rubber Co
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Filing: 1977-02-07
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Granted: 1979-02-13
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Expires: 1997-02-07
Abstract
Abstract A liquid ethylenically unsaturated polyetherurethane composition having a viscosity at 24° C. of 1000 to 10,000 centipoises dispersible in dilute aqueous sodium hydroxide is capable of being polymerized by actinic light to yield a solid having a Shore A hardness of at least 30 when the composition contains 0.5 to 15 percent dialkyl, aminoalkyl, acrylate or methacrylate. The resulting polymer is capable of taking on excellent halftone or half dot quality.
Inventors
- 👤 Shirish R. Jasani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/672; C08F; C08F299/00; C08F299/02; C08F299/06; C08G18/70; C08G18/72; C08G18/721; C08G18/722; C08G18/724; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
In a liquid ethylenically unsaturated polyetherurethane composition having no free NCO, a viscosity at 24° C. of 1,000 to 10,000 centipoises, dispersible in dilute aqueous sodium hydroxide and capable of being polymerized by actinic light to yield a solid having a Shore A hardness of at least 30, the improvement wherein said composition contains 0.5 to 15 percent of dialkyl aminoalkyl acrylate or methacrylate, said alkyl radical containing 1 to 10 carbon atoms said improved composition being capable of producing a printing plate having fine half-tone dots.
Claim 2
Dependent Claim
87 words
In a liquid ethylenically unsaturated polyetherurethane composition having no free NCO, a viscosity at 24° C. of 1,000 to 10,000 centipoises, dispersible in dilute aqueous sodium hydroxide and capable of being polymerized by actinic light to yield a solid having a Shore A hardness of at least 30, the improvement wherein said composition contains 0.5 to 15 percent of dialkyl aminoalkyl acrylate or methacrylate, said alkyl radical containing 1 to 10 carbon atoms said improved composition being capable of producing a printing plate having fine half-tone dots.
Claim 3
Dependent Claim
25 words
The polyetherurethane of claim 1 wherein the carbon to oxygen ratio of polyether portion of the polyetherurethane is greater than 2.0 but less than 3.0.
Claim 4
Dependent Claim
72 words
The polyetherurethane composition of claim 1 containing 10 to 85 percent of an ethylenic monomer on the composition basis, said monomer being a hydroxy alkyl acrylate or methacrylate, with said alkyl radical containing 2 to 3 carbon atoms or being a hydroxyalkoxy acrylate or methacrylate where the alkoxy is a radical containing from 1 to 10 repeating groups of the formula (--C 2 H 4 O--) or (--C 3 H 6 O--).
Claim 5
Dependent Claim
10 words
The polyetherurethane composition of claim 1 which contains a photosensitizer.
Claim 6
Dependent Claim
45 words
The polyetherurethane composition of claim 4 containing sufficient diluent to give the composition a viscosity at 25° C. of 3,000 to 6,000 centipoises and the diluent is polyethylene ether polyol acrylate or methacrylate where polyethylene ether polyol has a molecular weight of 200 to 6000.
Claim 7
Dependent Claim
15 words
The polyetherurethane composition of claim 4 wherein the photosensitizer is benzoin isobutyl ether or 2,2-diethoxyacetophenone.
Claim 8
Dependent Claim
31 words
The polyurethane composition of claim 1 wherein the dialkyl radical is diethyl or dimethyl and the composition is curable with ultraviolet light to produce a printing plate having fine half-tone dots.
Claim 9
Dependent Claim
15 words
The composition of claim 1 wherein the polyetherurethane is a reaction product of isophorone diisocyanate.
Claim 10
Dependent Claim
18 words
The composition of claim 1 wherein the dialkyl aminoalkyl acrylate or methacrylate is diethylamino ethyl acrylate or methacrylate.
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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |