US4173682A
Expired / Lapsed
US
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Process for coating a substrate with a radiation and moisture curable coating composition
Assignee: Akzo NV
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Filing: 1978-03-08
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Granted: 1979-11-06
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Expires: 1998-03-08
Abstract
Abstract A process is disclosed for coating a substrate with a radiation curble coating composition, characterized in that the composition comprises (A) an at least one isocyanate group-containing adduct of (a) an acrylic or methacrylic hydroxy ester with 5 to 20 carbon atoms and (b) a polyisocyanate with 4 to 40 carbon atoms and with 2 to 4 isocyanate groups per molecule, (B) a polyfunctional hydroxy compound having a molecular weight of 178 to 12,000 and a hydroxyl content of 0.5 to 30% by weight in an amount of 0.5 to 1.5 equivalents of hydroxy per equivalent of isocyanate of component A, and (C) a photoinitiator in an amount of 0.1 to 10% by weight of component A. The curing takes place in a first stage by radiation having a wavelength of 90 to 600 nm and in a second stage by reaction of the isocyanate groups of component A with water vapor and the hydroxyl groups of the polyfunctional hydroxy compound.
Inventors
- 👤 Arie Noomen
- 👤 Johannes M. P. van der Geest
- 👤 Cornelis de Jong
- 👤 Dick Van Santen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:22
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31855
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
160 words
A process for coating a substrate by applying to it a radiation curable coating composition based on a urethane compound and subjecting it to radiation have a wavelength of 90 to 600 nm, characterized in that a composition comprising (A) an at least one isocyanate group-containing adduct of (a) an acrylic or methacrylic hydroxy ester with 5 to 20 carbon atoms and (b) a polyisocyanate with 4 to 40 carbon atoms and with 2 to 4 isocyanate groups per molecule, (B) a polyfunctional hydroxy compound having a molecular weight of 178 to 12,000 and a hydroxyl content of 0.5 to 30% by weight in an amount of 0.5 to 1.5 equivalents of hydroxy per equivalent of isocyanate of component A, and (C) a photoinitiator in an amount of 0.1 to 10% by weight of component A, is applied to the substrate, and the coating layer is subjected to radiation and mainly after radiation the adduct is reached with water vapour.
Claim 2
Dependent Claim
160 words
A process for coating a substrate by applying to it a radiation curable coating composition based on a urethane compound and subjecting it to radiation have a wavelength of 90 to 600 nm, characterized in that a composition comprising (A) an at least one isocyanate group-containing adduct of (a) an acrylic or methacrylic hydroxy ester with 5 to 20 carbon atoms and (b) a polyisocyanate with 4 to 40 carbon atoms and with 2 to 4 isocyanate groups per molecule, (B) a polyfunctional hydroxy compound having a molecular weight of 178 to 12,000 and a hydroxyl content of 0.5 to 30% by weight in an amount of 0.5 to 1.5 equivalents of hydroxy per equivalent of isocyanate of component A, and (C) a photoinitiator in an amount of 0.1 to 10% by weight of component A, is applied to the substrate, and the coating layer is subjected to radiation and mainly after radiation the adduct is reached with water vapour.
Claim 3
Dependent Claim
21 words
A process according to claim 1, characterized in that the acrylic or methacrylic hydroxy ester contains 5 to 15 carbon atoms.
Claim 4
Dependent Claim
23 words
A process according to claim 1 or 2, characterized in that 2-hydroxyethylacrylate, 4-hydroxybutylacrylate or pentaerythritoltriacrylate is used as acrylic or methacrylic hydroxy ester.
Claim 5
Dependent Claim
17 words
A process according to claim 1, characterized in that the polyisocyanate contains 15 to 40 carbon atoms.
Claim 6
Dependent Claim
19 words
A process according to claim 1, characterized in that the polyisocyanate contains 2 or 3 isocyanate groups per molecule.
Claim 7
Dependent Claim
55 words
A process according to claim 1, characterized in that as polyisocyanate there is used the adduct of 3 molecules of hexamethylene-1,6-diisocyanate and 1 molecule of water, the adduct of 1 molecule of trimethylol propane and 3 molecules of toluene diisocyanate or the adduct of 1 molecule of trimethylol propane and 3 molecules of isophoron diisocyanate.
Claim 8
Dependent Claim
36 words
A process according to claim 1, characterized in that in the composition there is present a polyfunctional hydroxy compound in an amount of 0.9 to 1.1 equivalents of hydroxy per equivalent of isocyanate of component A.
Claim 9
Dependent Claim
30 words
A process according to claim 1, characterized in that the polyfunctional hydroxy compound contained in the composition is a polyester polyol, a polyether polyol, an acrylate polyol or a polycaprolactone.
Claim 10
Dependent Claim
27 words
A process according to claim 1, characterized in that the composition contains a polyfunctional hydroxy compound having a molecular weight in the range of 300 to 8000.
Claim 11
Dependent Claim
26 words
A process according to claim 1, characterized in that the composition contains a polyfunctional hydroxy compound having a hydroxyl content of 1 to 22% by weight.
Claim 12
Dependent Claim
21 words
A substrate coated wit a cured coating composition obtained by the method according to any one of claims 1 and 4-10.
Claim 13
Dependent Claim
149 words
A process for coating a substrate with a composition containing a cross-linked urethane which comprises coating the substrate with a cross-linkable urethane composition comprising A. an --NCO terminated ethylenically unsaturated adduct of an acrylic or methacrylic hydroxy ester having 5 to 20 carbon atoms and an organic polyisocyanate having 4 to 40 carbon atoms and from 2 to 4 isocyanate groups per molecule; B. an organic polyhydroxy compound having a molecular weight of 178 to 12,000 and a hydroxyl content of 0.5 to 30% by weight, and C. a photoinitiator said mixture containing A and B in a ratio which provides 0.5 to 1.5 equivalents of hydroxy per equivalent of --NCO and containing from 0.1 to 10% by weight of C based on the weight of A, polymerizing the adduct through its unsaturation with irradiation and subsequently reacting isocyanate groups of the resulting polymer with hydroxy groups of B.
Claim 14
Dependent Claim
149 words
A process for coating a substrate with a composition containing a cross-linked urethane which comprises coating the substrate with a cross-linkable urethane composition comprising A. an --NCO terminated ethylenically unsaturated adduct of an acrylic or methacrylic hydroxy ester having 5 to 20 carbon atoms and an organic polyisocyanate having 4 to 40 carbon atoms and from 2 to 4 isocyanate groups per molecule; B. an organic polyhydroxy compound having a molecular weight of 178 to 12,000 and a hydroxyl content of 0.5 to 30% by weight, and C. a photoinitiator said mixture containing A and B in a ratio which provides 0.5 to 1.5 equivalents of hydroxy per equivalent of --NCO and containing from 0.1 to 10% by weight of C based on the weight of A, polymerizing the adduct through its unsaturation with irradiation and subsequently reacting isocyanate groups of the resulting polymer with hydroxy groups of B.
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) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |