US3963798A
Expired / Lapsed
US
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Thixotropic, radiation curable compositions
Assignee: Dow Chemical Co
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Filing: 1974-06-14
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Granted: 1976-06-15
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Expires: 1994-06-14
Abstract
Abstract A reactive metal oxide or metal hydroxide, such as ZnO, MgO, HgO or Ba(OH) 2 and acrylic or methacrylic acid are added to a liquid, hydrophobic, essentially solvent-free coating vehicle capable of being cured by high-energy radiation. The resulting coating composition, as compared to the vehicle alone, can be cured with lower radiation doses, is less susceptible to oxygen inhibition of curing with ionizing radiation and exhibits a thixotropic viscosity which prevents excessive penetration of the coating into porous substrates and contributes non-drip, low-flow characteristics to the composition.
Inventors
- 👤 Lewis S. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:52
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/36; C23C10/38; C08; C08F; C08F283/00; C08F283/01; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C09; C09D; C09D133/00; C09D133/04; C09D5/00; C09D5/04; C23C10/02; Y; Y10; Y10S; Y10S525/00; Y10S525/922; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
191 words
A thixotropic coating composition curable by exposure to high-energy radiation produced by incorporating into a hydrophobic, essentially solvent-free resin that is liquid at ambient temperature, curable by exposure to high-energy radiation and essentially free of reactive carboxylic acid groups (1) an additive selected from the group consisting of ZnO, MgO, CaO, SrO, BaO, HgO, PbO, Pb 3 O 4 , CuO, CdO, NiO, Sb 2 O 3 , MnO 2 , SnO 2 , ZrO 2 , Fe 2 O 3 , Co 2 O 3 , alkali metal oxides and the hydroxides corresponding thereto, said additive being dispersible in said resin in a finely divided state and (2) an acid selected from the group consisting of acrylic acid and methacrylic acid, said additive being reactive with said acid to form a metal salt thereof and water, the amount of said additive being at least 3% by weight of said composition and the amount of said acid being at least the lesser of 0.3 mole per equivalent of said additive and 0.5% by weight of said composition, the amounts of said additive and acid being sufficient to render said composition thixotropic.
Claim 2
Dependent Claim
191 words
A thixotropic coating composition curable by exposure to high-energy radiation produced by incorporating into a hydrophobic, essentially solvent-free resin that is liquid at ambient temperature, curable by exposure to high-energy radiation and essentially free of reactive carboxylic acid groups (1) an additive selected from the group consisting of ZnO, MgO, CaO, SrO, BaO, HgO, PbO, Pb 3 O 4 , CuO, CdO, NiO, Sb 2 O 3 , MnO 2 , SnO 2 , ZrO 2 , Fe 2 O 3 , Co 2 O 3 , alkali metal oxides and the hydroxides corresponding thereto, said additive being dispersible in said resin in a finely divided state and (2) an acid selected from the group consisting of acrylic acid and methacrylic acid, said additive being reactive with said acid to form a metal salt thereof and water, the amount of said additive being at least 3% by weight of said composition and the amount of said acid being at least the lesser of 0.3 mole per equivalent of said additive and 0.5% by weight of said composition, the amounts of said additive and acid being sufficient to render said composition thixotropic.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said acid is acrylic acid.
Claim 4
Dependent Claim
30 words
The composition of claim 1 wherein said additive is selected from the group consisting of ZnO, MgO, PbO, CaO, SrO, BaO, HgO, Pb 3 O 4 and hydroxides corresponding thereto.
Claim 5
Dependent Claim
11 words
The composition of claim 3 wherein said acid is acrylic acid.
Claim 6
Dependent Claim
10 words
The composition of claim 1 wherein said additive is ZnO.
Claim 7
Dependent Claim
11 words
The composition of claim 5 wherein said acid is acrylic acid.
Claim 8
Dependent Claim
32 words
The composition of claim 1 wherein said resin comprises an acrylate ester resin produced by reacting a half-ester of a 2-hydroxaylkyl acrylate or 2-hydroxalkyl methacrylate and a dibasic acid with a polyepoxide.
Claim 9
Dependent Claim
11 words
The composition of claim 7 wherein said acid is acrylic acid.
Claim 10
Dependent Claim
30 words
The composition of claim 7 wherein said additive is selected from the group consisting of ZnO, MgO, PbO, CaO, SrO, BaO, HgO, Pb 3 O 4 and hydroxides corresponding thereto.
Claim 11
Dependent Claim
11 words
The composition of claim 9 wherein said acid is acrylic acid.
Claim 12
Dependent Claim
10 words
The composition of claim 7 wherein said additive is ZnO.
Claim 13
Dependent Claim
11 words
The composition of claim 11 wherein said acid is acrylic acid.
Claim 14
Dependent Claim
23 words
The composition of claim 1 wherein at least 1.0 mole of said acid per equivalent of said additive is incorporated into said vehicle.
Claim 15
Dependent Claim
20 words
The composition of claim 1 wherein the amount of said additive is at least 3 by weight of said composition.
Claim 16
Dependent Claim
31 words
The composition of claim 14 wherein the amount of said acid is at least the lesser of 0.3 mole per equivalent of said additive and 0.5% by weight of said composition.
Claim 17
Dependent Claim
23 words
The composition of claim 14 wherein at least 1.0 mole of said acid per equivalent of said additive is incorporated into said vehicle.
Claim 18
Dependent Claim
62 words
The composition of claim 1 wherein said resin comprises an acrylate ester resin produced by reacting a polyfunctional material selected from the group consisting of (a) dicarboxylic acids and dicarboxylic acid chlorides having from 4 to 15 carbon atoms, and (b) polyfunctional isocyanates having terminal, reactive isocyanate groups with a compound selected from the group consisting of 2-hydroxyalkyl acrylates and 2-hydroxyalkyl methacrylates.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |