Patent US918388A successfully refreshed from Google Patents.
US4337130A
Expired / Lapsed
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Photocurable polyurethane film coatings
Assignee: EIDP Inc
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Filing: 1981-03-26
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Granted: 1982-06-29
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Expires: 2001-03-26
Abstract
Abstract A photopolymerizable polyurethane composition comprising (1) a polyurethane based on an aliphatic diisocyanate, poly(hexamethylene isophthalate glycol) and, optionally, 1,4-butanediol; (2) a polyfunctional acrylic ester; (3) a photoinitiator; and (4) an anti-oxidant, can be formulated so that it provides a hard, abrasion-resistant, and stain-resistant finish for floor tiles or so that it can be used as a scratch-resistant and stain-resistant outer coating for bilayer automotive safety glass assemblies.
Inventors
- 👤 Leo Ahramjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:06
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; C; C08; C08F; C08F283/00; C08F283/006; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/63; C08G18/637; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
113 words
A photocurable polyurethane composition consisting essentially of the following components: (1) a polyurethane made from (a) an aliphatic diisocyanate, (b) a poly(hexamethylene isophthalate)glycol having a number average molecular weight of about 500-1600, and (c) 1,4-butanediol; with the provisos that the respective mole ratios of components (a), (b), and (c) are 1-2:1:0-1; and the total amount of components (b) and (c) is about equivalent to the amount of component (a); (2) a photopolymerizable polyfunctional acrylate or methacrylate ester in an amount of about 2-15% based on the weight of component (1); (3) an amount of a photoinitiator effective to cause component (2) to polymerize in the presence of ultraviolet light; and (4) an antioxidant.
Claim 2
Dependent Claim
113 words
A photocurable polyurethane composition consisting essentially of the following components: (1) a polyurethane made from (a) an aliphatic diisocyanate, (b) a poly(hexamethylene isophthalate)glycol having a number average molecular weight of about 500-1600, and (c) 1,4-butanediol; with the provisos that the respective mole ratios of components (a), (b), and (c) are 1-2:1:0-1; and the total amount of components (b) and (c) is about equivalent to the amount of component (a); (2) a photopolymerizable polyfunctional acrylate or methacrylate ester in an amount of about 2-15% based on the weight of component (1); (3) an amount of a photoinitiator effective to cause component (2) to polymerize in the presence of ultraviolet light; and (4) an antioxidant.
Claim 3
Dependent Claim
29 words
A composition of claim 1 wherein component (1) is prepared in situ from ingredients (a), (b), and (c) in the presence of a catalyst which promotes the urethane formation.
Claim 4
Dependent Claim
26 words
A composition of claim 1 wherein the aliphatic diisocyanate is selected from the group consisting of 4,4'-methylenebis(cyclohexyl isocyanate), 1-isocyanato-2-isocyanatomethyl-3,5,5-trimethylcyclohexane, and isocyanate-terminated biuret based on 1,6-hexamethylene diisocyanate.
Claim 5
Dependent Claim
11 words
A composition of claim 3 wherein the diisocyanate is 4,4'-methylenebis(cyclohexyl isocyanate).
Claim 6
Dependent Claim
15 words
A composition of claim 4 wherein the diisocyanate contains about 18-24% of the trans,trans isomer.
Claim 7
Dependent Claim
22 words
A composition of claim 1 wherein component (2) is selected from the group consisting of trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, and pentaerythritol triacrylate.
Claim 8
Dependent Claim
11 words
A composition of claim 6 wherein component (2) is trimethylolpropane trimethacrylate.
Claim 9
Dependent Claim
21 words
A composition of claim 7 wherein the proportion of component (2) is about 8% based on the weight of component (1).
Claim 10
Dependent Claim
28 words
A composition of claim 2 wherein the urethane-promoting catalyst is present in an amount of about 0.01-3% based on the total weight of components (a), (b), and (c).
Claim 11
Dependent Claim
23 words
A composition of claim 1 wherein the amount of the antioxidant is 0.1-0.5% based on the combined weights of components (1) and (2).
Claim 12
Dependent Claim
23 words
A composition of claim 5 wherein the respective mole ratios of constituent components (a), (b), and (c) of component (1) are about 1.5/1.0/0.5.
Claim 13
Dependent Claim
11 words
A composition of claim 11 wherein component (2) is trimethylolpropane trimethacrylate.
Claim 14
Dependent Claim
20 words
A composition of claim 5 wherein the respective mole ratios of constituent components (a), (b), and (c) are about 1.25/1.0/0.25.
Claim 15
Dependent Claim
11 words
A composition of claim 13 wherein component (2) is trimethylolpropane trimethacrylate.
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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |