Patent US4293475A successfully refreshed from Google Patents.
US4293475A
Expired / Lapsed
US
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Pigment dispersions for surface-coating compositions and surface-coating compositions containing same
Assignee: KAY-FRIES Inc
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Filing: 1980-09-12
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Granted: 1981-10-06
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Expires: 2000-09-12
Abstract
Abstract Universal pigment dispersions for use in surface-coating compositions contain as dispersant water-soluble salts of polymers prepared from monomer mixtures containing 30% to 75% by weight of at least one hydroxyalkyl methacrylate wherein the hydroxyalkyl group has 2 to 4 carbon atoms, 20% to 65% by weight of methacrylic acid, and 2% to 20% by weight of at least one other ethylenically-unsaturated monomer, such as styrene and/or glycidyl methacrylate.
Inventors
- 👤 Henri Sidi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:55
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/02; C09D133/04; C09D133/14; C09D17/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
139 words
A pigment dispersion that comprises (a) 10% to 75% by weight of a pigment component; (b) 5% to 35% by weight of a dispersant that is a water-soluble salt of a polymer derived from (1) 30% to 75% by weight of at least one hydroxyalkyl methacrylate wherein the hydroxyalkyl group has from 2 to 4 carbon atoms; (2) 20% to 65% by weight of methacrylic acid; and (3) 2% to 20% by weight of at least one ethylenically-unsaturated monomer selected from the group consisting of styrene, vinyltoluene, glycidyl acrylate, and glycidyl methacrylate, said polymer having an acid value in the range of 160 to 400 and a hydroxyl value in the range of 150 to 320; and (c) 15% to 70% by weight of a solvent selected from the group consisting of water, water-miscible organic solvents, and mixtures thereof.
Claim 2
Dependent Claim
139 words
A pigment dispersion that comprises (a) 10% to 75% by weight of a pigment component; (b) 5% to 35% by weight of a dispersant that is a water-soluble salt of a polymer derived from (1) 30% to 75% by weight of at least one hydroxyalkyl methacrylate wherein the hydroxyalkyl group has from 2 to 4 carbon atoms; (2) 20% to 65% by weight of methacrylic acid; and (3) 2% to 20% by weight of at least one ethylenically-unsaturated monomer selected from the group consisting of styrene, vinyltoluene, glycidyl acrylate, and glycidyl methacrylate, said polymer having an acid value in the range of 160 to 400 and a hydroxyl value in the range of 150 to 320; and (c) 15% to 70% by weight of a solvent selected from the group consisting of water, water-miscible organic solvents, and mixtures thereof.
Claim 3
Dependent Claim
96 words
A pigment dispersion as set forth in claim 1 wherein the dispersant is an alkali metal, ammonium, or amine salt of a polymer derived from (a) 55% to 65% by weight of at least one hydroxyalkyl methacrylate; (b) 30% to 40% by weight of methacrylic acid; and (c) 5% to 15% by weight of at least one ethylenically-unsaturated monomer selected from the group consisting of styrene, vinyltoluene, glycidyl acrylate, and glycidyl methacrylate, said polymer having an acid value in the range of 170 to 210 and a hydroxyl value in the range of 255 to 310.
Claim 4
Dependent Claim
19 words
A pigment dispersion as set forth in claim 1 wherein the dispersant is the ammonium salt of said polymer.
Claim 5
Dependent Claim
27 words
A pigment dispersion as set forth in claim 2 wherein the dispersant is a water-soluble salt of a polymer derived from hydroxyethyl methacrylate, methacrylic acid, and styrene.
Claim 6
Dependent Claim
28 words
A pigment dispersion as set forth in claim 2 wherein the dispersant is a water-soluble salt of a polymer derived from hydroxyethyl methacrylate, methacrylic acid, and glycidyl methacrylate.
Claim 7
Dependent Claim
29 words
A pigment dispersion as set forth in claim 2 wherein the dispersant is a water-soluble salt of a polymer derived from hydroxyethyl methacrylate, methacrylic acid, styrene, and glycidyl methacrylate.
Claim 8
Dependent Claim
21 words
A pigment dispersion as set forth in claim 2 wherein the solvent is a mixture of water and water-miscible organic solvents.
Claim 9
Dependent Claim
31 words
A pigment dispersion as set forth in claim 2 wherein the solvent is selected from the group consisting of water, ethylene glycol, propylene glycol, ethylene glycol monobutyl ether, and mixtures thereof.
Claim 10
Dependent Claim
40 words
A pigment dispersion as set forth in claim 1 that comprises (a) 25% to 60% by weight of a pigment component; (b) 10% to 25% by weight of said dispersant; and (c) 20% to 50% by weight of said solvent.
Claim 11
Dependent Claim
12 words
A surface-coating composition containing a pigment dispersion as defined in claim 1.
Claim 12
Dependent Claim
40 words
A surface-coating composition as set forth in claim 10 that contains 1% to 70% by weight of said pigment dispersion, 10% to 98% by weight of a film-forming resin component, and 1% to 80% by weight of a solvent component.
Claim 13
Dependent Claim
18 words
A surface-coating composition as set forth in claim 11 wherein the film-forming resin component comprises an alkyd resin.
Claim 14
Dependent Claim
18 words
A surface-coating composition as set forth in claim 11 wherein the film-forming resin component comprises an acrylic resin.
Claim 15
Dependent Claim
101 words
A polymeric dispersant for dispersing pigments in surface-coating compositions that is a water-soluble salt of a polymer derived from (a) 30% to 75% by weight of at least one hydroxyalkyl methacrylate wherein the hydroxyalkyl group has from 2 to 4 carbon atoms; (b) 20% to 65% by weight of methacrylic acid; and (c) 2% to 20% by weight of at least one ethylenically-unsaturated monomer selected from the group consisting of styrene, vinyltoluene, glycidyl acrylate, and glycidyl methacrylate, said polymer having an acid value in the range of 160 to 400 and a hydroxyl value in the range of 150 to 320.
Claim 16
Dependent Claim
101 words
A polymeric dispersant for dispersing pigments in surface-coating compositions that is a water-soluble salt of a polymer derived from (a) 30% to 75% by weight of at least one hydroxyalkyl methacrylate wherein the hydroxyalkyl group has from 2 to 4 carbon atoms; (b) 20% to 65% by weight of methacrylic acid; and (c) 2% to 20% by weight of at least one ethylenically-unsaturated monomer selected from the group consisting of styrene, vinyltoluene, glycidyl acrylate, and glycidyl methacrylate, said polymer having an acid value in the range of 160 to 400 and a hydroxyl value in the range of 150 to 320.
Claim 17
Dependent Claim
94 words
A polymeric dispersant as set forth in claim 14 that is an alkali metal, ammonium, or amine salt of a polymer derived from (a) 55% to 65% by weight of at least one hydroxyalkyl methacrylate, (b) 30% to 40% by weight of methacrylic acid, and (c) 5% to 15% by weight of at least one ethylenically-unsaturated monomer selected from the group consisting of styrene, vinyltoluene, glycidyl acrylate, and glycidyl methacrylate, said polymer having an acid value in the range of 170 to 210 and a hydroxyl value in the range of 255 to 310.
Claim 18
Dependent Claim
21 words
A polymeric dispersant as set forth in claim 14 wherein the polymer is derived from hydroxyethyl methacrylate, methacrylic acid, and styrene.
Claim 19
Dependent Claim
22 words
A polymer dispersant as set forth in claim 14 wherein the polymer is derived from hydroxyethyl methacrylate, methacrylic acid, and glycidyl methacrylate.
Claim 20
Dependent Claim
23 words
A polymeric dispersant as set forth in claim 14 wherein the polymer is derived from hydroxyethyl methacrylate, methacrylic acid, styrene, and glycidyl methacrylate.
Claim 21
Dependent Claim
17 words
A polymeric dispersant as set forth in claim 14 that is the ammonium salt of said polymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |