Patent US3962168A successfully refreshed from Google Patents.
US3962168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-skid coating and method
Assignee: Individual
•
Filing: 1974-01-24
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Granted: 1976-06-08
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Expires: 1994-01-24
Abstract
Abstract A new coating is composed of a compatible mixture of styrene acrylate polymers and polyvinyl acetate-acrylic co-polymers in a compatible organic-aqueous solvent system. The composition may contain extenders, fillers and pigments. A particularly useful application uses pulverized natural or synthetic rubbers to increase the resilience and skid resistance of the surface of the coated material. The coating is prepared by forming a solution of a styrene acrylate polymer in an organic solvent and blending the solution of styrene acrylate polymers in with an aqueous emulsion of a vinyl copolymer. Various pigments, fillers and extenders, such as clays, carbon blacks and pulverized rubber may be added to the mixture and the subsequent mixture is milled under conditions effective to produce a compatible, stable coating composition.
Inventors
- 👤 Hugh K. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:44
CPC Classifications
C; C09; C09D; C09D131/00; C09D131/02; C09D131/04; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C08; C08L; C08L17/00; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/14; C08L31/00; C08L31/02; C08L31/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
89 words
A resilient coating material comprising a stable emulsion of a styrene acrylate polymer having a molecular weight of between about 800 and 1000 and a polyvinyl acetate-acrylic co-polymer having a molecular weight between about 100,000 and 120,000 in a dispersible aqueous-organic co-solvent system, the styrene acrylate polymer being present in proportions of between about 4 and 8% by weight and the polyvinyl acetate-acrylic co-polymer being present in proportions of between about 20 and 35% by weight, the co-solvent system being about 50 to 75% by weight of the emulsion.
Claim 2
Dependent Claim
89 words
A resilient coating material comprising a stable emulsion of a styrene acrylate polymer having a molecular weight of between about 800 and 1000 and a polyvinyl acetate-acrylic co-polymer having a molecular weight between about 100,000 and 120,000 in a dispersible aqueous-organic co-solvent system, the styrene acrylate polymer being present in proportions of between about 4 and 8% by weight and the polyvinyl acetate-acrylic co-polymer being present in proportions of between about 20 and 35% by weight, the co-solvent system being about 50 to 75% by weight of the emulsion.
Claim 3
Dependent Claim
29 words
The coating material of claim 1 wherein a particulate resilient rubber material is incorporated in the coating material at a level of between about 5 and 10% by weight.
Claim 4
Dependent Claim
39 words
The coating material of claim 1 wherein a particulate rubber material having a particle size between about 20 mesh and 30 mesh and is incorporated in the coating at a level of between about 5 and 10% by weight.
Claim 5
Dependent Claim
19 words
The coating material of claim 1 wherein the dispersible co-solvent system contains a mixture of xylene and mineral spirits.
Claim 6
Dependent Claim
88 words
A resilient slip resistant coating material comprising a stable, compatible emulsion of a styrene acrylate polymer having a molecular weight of between about 800 and 1000 and a polyvinyl acetate-acrylic co-polymer having a molecular weight between about 100,000 and 120,000 in an aqueous-organic co-solvent system, the emulsion containing between about 4 to 8% by weight of styrene acrylate co-polymer, between about 20 to 35% by weight polyvinyl acetate-acrylic co-polymer and compatible fillers and pigments, the aqueous-organic solvent system being between about 50 to 75% of the coating material.
Claim 7
Dependent Claim
88 words
A resilient slip resistant coating material comprising a stable, compatible emulsion of a styrene acrylate polymer having a molecular weight of between about 800 and 1000 and a polyvinyl acetate-acrylic co-polymer having a molecular weight between about 100,000 and 120,000 in an aqueous-organic co-solvent system, the emulsion containing between about 4 to 8% by weight of styrene acrylate co-polymer, between about 20 to 35% by weight polyvinyl acetate-acrylic co-polymer and compatible fillers and pigments, the aqueous-organic solvent system being between about 50 to 75% of the coating material.
Claim 8
Dependent Claim
24 words
The coating material of claim 5 wherein the compatible filler is selected from the group consisting of clay, carbon black, pulverized rubber and pigments.
Claim 9
Dependent Claim
18 words
The coating material of claim 5 wherein the coating has a viscosity between about 95-125 KU (Stormer Units).
Claim 10
Dependent Claim
18 words
The coating material of claim 5 wherein the coating has a viscosity of about 112 KU (Stormer Units).
Claim 11
Dependent Claim
20 words
The coating material of claim 1 wherein the viscosity of the emulsion is adjustable by addition of water and mixing.
Claim 12
Dependent Claim
124 words
A process of preparing a coating compound comprising dissolving a styrene acrylate resin having a molecular weight between about 800 and 1000 in a water dispersible organic solvent, mixing the resulting solution with a polyvinyl acetate-acrylic aqueous emulsion having a molecular weight between about 100,000 and 120,000, the ratio of mixing of the organic solution and the aqueous emulsion being between about 2/1 to 1/2, adding pigments and fillers to the mixture and milling the mixture pigments and fillers under conditions effective to form a stable, compatible compound having between about 4 to 8% styrene acrylate, between about 20 to 35% polyvinyl acetate-acrylic and between about 50 to 75% solvents, the milling being controlled to keep the temperature of the mixture below about 150°F.
Claim 13
Dependent Claim
124 words
A process of preparing a coating compound comprising dissolving a styrene acrylate resin having a molecular weight between about 800 and 1000 in a water dispersible organic solvent, mixing the resulting solution with a polyvinyl acetate-acrylic aqueous emulsion having a molecular weight between about 100,000 and 120,000, the ratio of mixing of the organic solution and the aqueous emulsion being between about 2/1 to 1/2, adding pigments and fillers to the mixture and milling the mixture pigments and fillers under conditions effective to form a stable, compatible compound having between about 4 to 8% styrene acrylate, between about 20 to 35% polyvinyl acetate-acrylic and between about 50 to 75% solvents, the milling being controlled to keep the temperature of the mixture below about 150°F.
Claim 14
Dependent Claim
34 words
The method of claim 10 wherein the coating compound is milled for between about 20 minutes and 30 minutes using a high speed disperser mixer at a speed of between 1000 and 1500 rpm.
Claim 15
Dependent Claim
23 words
The method of claim 10 wherein the filler is selected from the group consisting of clay, carbon black, pulverized rubber and titanium dioxide.
Claim 16
Dependent Claim
24 words
The method of claim 10 wherein the viscosity of the milled coating compound is adjusted to between about 95 to 125 KU (Stormer Units).
Claim 17
Dependent Claim
26 words
The method of claim 10 wherein the viscosity of the milled coating compound is adjusted to 112 KU (Stormer Units) by adding additional water and mixing.
Claim 18
Dependent Claim
26 words
The method of claim 1 wherein a pulverized rubber filler having a particle size between about 20 mesh and 30 mesh is added to the mixture.
References Cited (Backward Citations)
US2465295A
Cited
US3640912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |