US4283320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-gloss latex paint
Assignee: Akzo Nobel Paints LLC
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Filing: 1979-06-04
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Granted: 1981-08-11
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Expires: 1999-06-04
Abstract
Abstract An opacified latex paint comprising small particle film-forming latex binders in combination with minor amounts of opacifying pigment, and substantial amounts of non-film-forming polymeric particles (plastic pigment) provides a semi-gloss latex paint composition having excellent hard enamel surfaces along with desirable film integrity properties. The plastic pigment particles are between about 0.1 and 0.5 microns and contain 0.2 to 2% copolymerized monomers containing carboxylic acid groups. The semi-gloss plastic pigment latex paint is compounded at pigment-volume-content (PVC) between about 30% and 45% and considerably higher than conventional high quality enamel latex paints. The opacified semi-gloss paint films exhibit excellent physical properties such as hard enamel surfaces, scrub resistance, burnish resistance, mar resistance, stain resistance, and other desirable paint film integrity properties.
Inventors
- 👤 Howard E. Carroll
- 👤 Gerald M. Sweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:03
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/02; C09D5/024; C09D5/028; C09D7/00; C09D7/40; C09D7/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
212 words
An aqueous latex dispersion paint composition which coalesces at an ambient coalescing temperature into a semi-gloss hardened continuous paint film, said latex paint having about 30% to 70% by weight total solids and comprising on a dry solids volume basis: 55% to 70% of a film-forming latex binder having a major weight portion of polymer particles between about 500 A and 5000 A and having a glass transition temperature at least about 5° C. below said coalescing temperature whereby said binder particles will coalesce into a binding matrix, said binder particles being a vinyl copolymer comprising by weight at least 40% polymerized vinyl unsaturated monomers; 10% to 25% of solid, non-cellular, non-film-forming polymer particles having a weighted average diameter between about 1000 A and 5000 A and having a glass transition temperature at least about 30° C. above the glass transition temperature of said binder, said non-film-forming polymer particles being polymerized ethylenicaly unsaturated monomers containing between 0.2% and 2% of copolymerized acid monomer selected from acrylic acid or methacrylic acid; 5% to 20% opacifying pigment having a refractive index of at least about 1.8; 0% to 15% of non-opacifying pigment; and said latex paint having a pigment-volume-content (PVC) between about 30% and 45% PVC but less than critical-PVC as measured by opacity.
Claim 2
Dependent Claim
212 words
An aqueous latex dispersion paint composition which coalesces at an ambient coalescing temperature into a semi-gloss hardened continuous paint film, said latex paint having about 30% to 70% by weight total solids and comprising on a dry solids volume basis: 55% to 70% of a film-forming latex binder having a major weight portion of polymer particles between about 500 A and 5000 A and having a glass transition temperature at least about 5° C. below said coalescing temperature whereby said binder particles will coalesce into a binding matrix, said binder particles being a vinyl copolymer comprising by weight at least 40% polymerized vinyl unsaturated monomers; 10% to 25% of solid, non-cellular, non-film-forming polymer particles having a weighted average diameter between about 1000 A and 5000 A and having a glass transition temperature at least about 30° C. above the glass transition temperature of said binder, said non-film-forming polymer particles being polymerized ethylenicaly unsaturated monomers containing between 0.2% and 2% of copolymerized acid monomer selected from acrylic acid or methacrylic acid; 5% to 20% opacifying pigment having a refractive index of at least about 1.8; 0% to 15% of non-opacifying pigment; and said latex paint having a pigment-volume-content (PVC) between about 30% and 45% PVC but less than critical-PVC as measured by opacity.
Claim 3
Dependent Claim
23 words
The latex paint in claim 1 wherein the binder is a vinyl copolymer containing between 80% and 100% by weight copolymerized vinyl monomer.
Claim 4
Dependent Claim
22 words
The latex paint in claim 1 wherein the binder contains polymer particles having an average size between 1000 A and 3000 A.
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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |