Patent Application
20060127569
The present invention relates to coatings for hard floor coverings, and a method of applying and maintaining hard floor coatings.
Various floor coverings are used in both residential and commercial settings. Concrete and vinyl tiles are two examples of common floor coverings. Generally, floor coverings need to be stripped, re-finished, and coated when the floor begins to look old or needs to be repaired. The cost of labor associated with stripping a floor is a major expense of floor care. It is also a time consuming process resulting in a period of time during which the floor cannot be used.
Normally, the color or appearance of a floor cannot be changed unless the existing floor is replaced. This can be a costly and time consuming procedure. Some floor coverings, however, are permanent and cannot be removed. For example, concrete floors that have been treated with colored epoxies are permanent, making it impossible to change the color or appearance of the existing floor.
The invention provides a method of applying a coating to hard floor coverings in a durable but non-permanent fashion. The method includes preparing the floor surface, sealing the floor surface, applying a colored polymer to the sealed surface, and applying a clear, non-epoxy floor finish. The method may be used on both concrete and vinyl tile floors and may be used to change the color of an existing floor or to provide a uniform color on an entire floor surface. When a color change is desired, the top layers of finish can be removed, a new colored polymer can be applied, followed by a clear, non-epoxy finish. Thus, the floor color or design can be changed as desired.
The present invention is directed to a method of applying a coating to hard floor coverings. The invention can be used to establish a uniform color on an old floor or can be used to change the floor color completely. It can be used on both concrete and vinyl tiles. A floor coated with the invention is extremely durable yet the coating may be removed if desired. Unlike floors finished with colored epoxies, a floor treated with the invention can be stripped or the color can be changed. However, the floor finish never needs to be stripped once the finish has been applied. Instead, when the floor begins to look old or if the owner wants to change the floor color, the floor can be top scrubbed, removing only the top layers of finish, followed by application of coats of colored polymer and several coats of a clear floor finish. Thus, the floor can be repaired or the color can be changed without stripping the floor all the way down to the bare surface. Another benefit of the present invention is that the cost of the coating is significantly less than the cost of vinyl tile replacement or concrete floors coated with epoxy. In addition, since a floor treated with the invention does not need to be stripped when repairs or a color change is made but only requires removal of the top layers of finish, the owner can also save the cost of labor associated with stripping the floor. An additional benefit of the present invention is the virtually unlimited number of designs that can be achieved. For example, the purchaser may choose a solid color, mixture of colors or may choose to create a pattern. Also, the floor may be tinted, creating a uniform apparent color over the entire surface, without changing the color of the underlying floor. This feature of the invention may be desirable in a multitude of areas such as in a commercial facility with old vinyl floors. If tiles have been replaced over the years with a similar but not identical color, tinting may be used to make all of the tiles look the same regardless of whether they are replacement tiles or the original tiles. An additional feature of the invention that sets it apart from other methods used to color a floor, such as Latex paint, is that the floor can be burnished with an ultra high speed floor machine which results in an extremely high gloss.
The invention comprises four steps. These are: surface preparation, sealing, application of a colored polymer, and application of a non-epoxy, clear floor finish.
In the preparation step, finish or seal is removed from the floor and the floor surface is cleaned. Preferably, a top scrub solution is applied to the floor, which is then buffed with a buffing machine. The floor is then wet/dry vacuumed. If necessary, this step can be repeated. The floor is then damp mopped with a neutral pH cleaner to remove any impurities that remain on the floor ensuring a dust-free and residue-free surface. A neutral pH cleaner works better than water alone to remove any existing residue that may be present on the floor.
After the floor surface has been prepared, the sealing step is performed. A sealer is a composition used to provide a uniform surface to which a colored polymer may adhere. It contains leveling agents which help the colored polymer to level out evenly on the floor surface. Various sealer compositions may be used and should be selected for their compatibility with the floor surface. The number of coats of sealer to be applied depends on the solids content of the sealer used. The higher the solids content, the fewer the number of coats that need to be applied. Application of a sufficient number of coats of sealer ensures an evenly and properly prepared surface to which a colored polymer can adhere. Two types of sealer may be preferably used in this step which are described below as Sealer Formula 1 and Sealer Formula 2. All percentages are by weight unless otherwise specified.
Sealer Formula 1
After a sealer is applied, it is cured, usually for twelve hours. A colored polymer can then be applied. Application of a colored polymer allows one to completely change the floor color or appearance, or simply add a tint to the floor, creating a uniform apparent color on the entire floor surface. Preferably, a colored polymer consists of a combination of a sealer and colorant. A colorant is a substance that imparts color to another material and can be either a pigment or a dye. Sealer is used because of its “rock” hard quality and low solids content which allows for the colorant to blend and level with the seal when it is applied to the floor. The same sealer formulas that are available for the sealing step are available for mixing with a colorant. The sealer that is used depends on the type of floor surface to which it will be applied. Sealer Formula 1 is generally mixed with a colorant and applied to concrete floors. Sealer Formula 2 is generally mixed with a colorant and applied to softer surfaces, such as vinyl tile.
As mentioned, the colorants in the colored polymer can be dye based or pigment based. There is no generally accepted distinction between dyes and pigments. However, dyes are usually soluble and used in solution to stain materials while pigments are generally insoluble and are used in suspension. The dyes used in this step contain a lower solids content than the pigments. Some colored polymers, especially those that contain a dye based colorant rather than a pigment, perform better when a coat or two of gray or white primer has been applied over the clear seal. Dye based colorants, for example, red, blue, yellow, and green, are not as effective as pigment based colorants in masking the underlying floor patterns, thus more coats are required. However, colorants that contain pigments usually achieve complete coverage of the floor without allowing any underlying patterns to come through. Therefore, colored polymers that contain dye based colorants achieve maximum results when a colored polymer containing a pigment based colorant, such as white or gray, is used as a primer before the desired color is applied.
A colored polymer varies in solid content depending on the color that is to be applied. Generally, the amount of solids range from 20% for a tint up to 28% for a solid color. If too much colorant is added to the sealer, the leveling agents found in the seal become overloaded and the color will not spread out evenly when applied to the sealed surface. However, this effect may be desired in some applications. For example, when the amount of solids approaches or exceeds 25%, areas of the floor may appear darker than other areas which creates an illusion of depth.
Before applying any color, a colored polymer can be cut and edged in around the perimeter of the prepared surface using foam or high quality hair paintbrushes to keep the color from contacting any surface other than the intended area of application. After the perimeter has been edged, a colored polymer is applied evenly to the surface. The application methods for a colored polymer, including the amount of color applied per coat or per square foot, depend on the desired effect. Also, a single color can be used, color can be mixed, or various colors or shades can be used to create designs. One method of application requires masking off the area of “non-contact,” for example, walls and baseboards, and using a sprayer, such as a pump-up sprayer or a paint gun, to apply the colored polymer. Generally, one to five light coats of colored polymer applied to concrete will allow some of the natural concrete patterns to come through. Each additional coat of colored polymer builds on the existing color base, thus minimizing this effect. Optimal results are achieved on concrete when eight to ten coats of colored polymer are applied. However, the applicator has discretion in the number of coats to be applied based on the desired effect.
Application of a colored polymer to vinyl tiles differs somewhat from concrete application. Generally, four or five coats of colored polymer are applied for a tint. When tinting, broken or cracked tiles should be replaced with tiles similar in color to the original color before beginning the process. When coloring, the color of the replacement tile is not important, especially if a primer is applied, since the tiles will be covered with a new color. When applying color, a minimum of five coats to a maximum of ten coats of colored polymer is usually applied. Generally, no more than five coats of colored polymer should be applied per day. The colored polymer should be allowed to cure, typically for 12-15 hours before application of color is resumed the next day. It is recommended that the area is buffed with a high speed buffer then dust and damp mopped before application of color is resumed. The colored polymer should then be allowed to cure, typically for 12-18 hours.
Finally, a clear, non-epoxy finish is applied. Buffing, dust mopping and damp mopping should be repeated before a clear floor finish is applied. The number of coats to be applied varies depending on the floor maintenance program of the facility. The type of buffers used and the frequency of buffing will determine the optimal number of coats to be applied. The number of coats also depends on the solids content of the finish. The higher the solids content of the finish, the fewer the number of coats that need to be applied. Several non-epoxy, clear floor finishes are available for this step, preferably Finishing Formulas 1, 2, and 3.
Finishing Formula 1
In order to clean a floor treated by the method of this invention, it is recommended that a restorer solution, such as one containing at least Cocamide-DEA (1-10%), D-Limonene (1-10%), and water, be used either by mopping or in an automatic scrubber before high-speed buffing. Such a solution makes the floor less slippery, restores a deep shine to the finish, and cleans the floor. In addition, a neutral no-film cleaner is recommended for daily damp-mopping. A composition containing at least Tetrasodium E.D.T.A (1-5%), Nonionic surfactant (<10%), Sodium Lauriminodipropionate (1-5%), and water is recommended for this purpose.
If the colored polymer layer become scratched or chipped, this system also allows for easy repairs. The area to be repaired should be treated with a top scrub solution which can be applied using a foam brush. The area should then be buffed with a low speed machine, wet/dry vacuumed at least one time, then damp mopped with a neutral pH cleaner. A colored polymer should then be applied over any chips or scratches and should be allowed to dry and can be reapplied if necessary. A coat of the colored polymer should then be applied over the entire surface area. After the colored polymer has dried, three or four coats of a clear floor finish should be applied to the entire surface area. Finally, the surface should be buffed with a buffing machine. This repair procedure saves the facility the time associated with replacing a scratched or chipped floor and maintains a clean appearance.
The present application is a divisional of U.S. patent application Ser. No. 10/197,796, filed on Jul. 18, 2002 and still pending, the entire contents of which are hereby expressly incorporated herein by reference thereto.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10197796 | Jul 2002 | US |
| Child | 11269343 | Nov 2005 | US |
