US4212901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating a substrate with a radiation and chemically curable coating composition
Assignee: Akzo NV
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Filing: 1978-07-10
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Granted: 1980-07-15
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Expires: 1998-07-10
Abstract
Abstract A method is provided for treating a substrate with a radiation curable coating composition based on a polyester resin esterified with acrylic acid or methacrylic acid and having a hydroxyl number in the range of from 50 to 250 and an ethylenic unsaturation equivalent weight of from 200 to 10,000 grams and on a polyisocyanate that is present in an amount of 0.7 to 1.3 equivalents of isocyanate per equivalent of hydroxyl contained in the composition. The curing of the coating composition is effected in a first stage by subjecting the composition to radiation having a wave length of 200 to 600 nm and in a second stage by reaction between the isocyanate groups of the polyisocyanate and the hydroxyl groups of the polyester resin.
Inventors
- 👤 Abraham van Neerbos
- 👤 Adrianus C. J. van Oosterhout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:44
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/672; C08G18/68; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/046; C08J2475/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A method for treating a substrate with a radiation curable coating composition based on a polyester resin esterified with acrylic acid and/or methacrylic acid, a vinyl compound and a photoinitiator, the coating composition being dried under the influence of light having a wave length of 200 to 600 nm, characterized in that the polyester resin esterified with meth(acrylic) acid has a hydroxyl number in the range of 50 to 250 and an ethylenic unsaturation equivalent weight in the range of 200 to 10,000 grams, and in that the coating composition also contains a polyisocyanate in an amount of 0.7 to 1.3 equivalents of isocyanate per equivalent of hydroxyl contained in the composition.
Claim 2
Independent Claim
112 words
A method for treating a substrate with a radiation curable coating composition based on a polyester resin esterified with acrylic acid and/or methacrylic acid, a vinyl compound and a photoinitiator, the coating composition being dried under the influence of light having a wave length of 200 to 600 nm, characterized in that the polyester resin esterified with meth(acrylic) acid has a hydroxyl number in the range of 50 to 250 and an ethylenic unsaturation equivalent weight in the range of 200 to 10,000 grams, and in that the coating composition also contains a polyisocyanate in an amount of 0.7 to 1.3 equivalents of isocyanate per equivalent of hydroxyl contained in the composition.
Claim 3
Dependent Claim
22 words
The method of claim 1, characterized in that the polyester resin has an ethylenic unsaturation equivalent weight of 250 to 3500 grams.
Claim 4
Dependent Claim
30 words
The method of claim 1, characterized in that the unsaturation of the polyester resin is for 35 to 100% caused by the presence of acrylic acid and/or methacrylic acid groups.
Claim 5
Dependent Claim
24 words
The method of claim 1, characterized in that the polyisocyanate is present in an amount of 0.9 to 1.1 equivalents per equivalent of hydroxyl.
Claim 6
Dependent Claim
18 words
The method of claim 1, characterized in that the polyisocyanate has 2 or 3 isocyanate groups per molecule.
Claim 7
Dependent Claim
23 words
The method of claim 1, characterized in that the polyisocyanate used is an adduct based on hexamethylene diisocyanate, toluene diisocyanate or isophoron diisocyanate.
Claim 8
Independent Claim
129 words
A method for treating a substrate with a radiation-curable coating composition comprising applying to said substrate a coating composition comprising (1) a polyester resin esterified with acrylic acid and/or methacrylic acid and having an hydroxyl number in the range of 50 to 250 and an ethylenic unsaturation equivalent weight in the range of 200 to 10,000 grams, (2) a polyisocyanate present in an amount of about 0.7 to about 1.3 equivalents of isocyanate per equivalent of hydroxyl contained in said composition, (3) a vinyl compound, and (4) a photoinitiator, initially curing the applied coating composition under the influence of light having a wave length of 200 to 600 nm, and completing the curing by reacting the isocyanate groups of said polyisocyanate with the hydroxyl groups of said polyester resin.
Claim 9
Independent Claim
129 words
A method for treating a substrate with a radiation-curable coating composition comprising applying to said substrate a coating composition comprising (1) a polyester resin esterified with acrylic acid and/or methacrylic acid and having an hydroxyl number in the range of 50 to 250 and an ethylenic unsaturation equivalent weight in the range of 200 to 10,000 grams, (2) a polyisocyanate present in an amount of about 0.7 to about 1.3 equivalents of isocyanate per equivalent of hydroxyl contained in said composition, (3) a vinyl compound, and (4) a photoinitiator, initially curing the applied coating composition under the influence of light having a wave length of 200 to 600 nm, and completing the curing by reacting the isocyanate groups of said polyisocyanate with the hydroxyl groups of said polyester resin.
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) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |