Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2001-07-25
2003-09-09
Niland, Patrick D. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C523S200000
Reexamination Certificate
active
06617386
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a structural finish. In particular, the present invention relates to a textured finish composition for the exterior of a building or structure. More particularly, the present invention relates to the incorporation of a unique aggregate within a finish composition which exhibits desired physical properties, including durability and textured appearance.
BACKGROUND OF THE INVENTION
Many factors are important in choosing an exterior surface of a building or structure, for example, the durability and appearance of the finish. There are a limited number of materials which possess the proper physical characteristics to allow their application to the exterior of a building, these materials include: brick, aluminum siding, wood siding, concrete and premixed acrylic finishes such as a DRYVIT® style of finish.
The most typical exterior surfaces of buildings and structures are brick and siding. While brick exteriors have the advantage of being durable, a brick exterior is also very costly, which can be a deterrence. Siding is not as durable as brick and has the disadvantage of requiring a relatively higher amount of maintenance, for example, cleaning and painting.
In addition, traditional exterior finishes have the disadvantage of being difficult to repair. For example, in order to repair damage to a brick exterior, the replacement brick must “match” the standing brick.
A DRYVIT® style of finish, on the other hand, is a relatively new type of finish that has the advantage of good durability and a relatively low cost with minimal maintenance. For example an insulating layer is covered by a base coat embedding a fiberglass mesh, which is then covered by the finish coat. These types of finishes are typically applied using a trowel. One advantage of a DRYVIT® finish over the traditional brick exterior is the possibility of creating a custom color for the exterior surface, unlike brick, where there is a relatively small choice in colors.
DRYVIT® finishes are manufactured by Dryvit Systems, Inc. One advantage of a DRYVIT® finish is that there are several textured finishes offered for the Exterior Insulation and Finish Systems (“EIFS”) market. The finishes are premixed acrylic coatings that are offered in standard colors as well as custom colors. By varying the grade (coarse to fine) and by varying the amount of aggregate in the finish, different types of textures are provided. These different types of textures provide an aesthetically pleasing exterior to a consumer depending on individual tastes. These premixed finishes can be applied over properly prepared substrates such as exterior masonry, stucco, pre-cast or cast-in place concrete, and other approved substrates.
The finishes are typically supplied in 5-gallon pails and weigh about 68-70 pounds per pail. The heavy weight of the pails slows down the productivity of the workers during application of the finish.
It is therefore desirable to have a lightweight textured finish that retains the appearance and durability characteristics of existing textured finishes. It is further desirable for the finish to be such that it can easily be applied to an interior and/or exterior surface, providing uniform durable coverage having the look and feel of the desired texture. It is still further desirable that such a finish be available in various colors. Still further, it is desirable that repairs can be made to the underlying substrate and then the textured finish applied to the repaired area to blend with previously coated adjacent textured areas. Such an improved finish should be able to be applied using conventional methods, such as trowel application or spray application using a hopper gun or pole gun-type sprayer.
SUMMARY OF THE INVENTION
In one aspect of the present invention, a finish composition formed of a resin dispersion and an aggregate that has a water resistant coating is provided.
In another aspect of the present invention, the finish composition is formed of a resin dispersion including an aggregate having a water resistant coating, where the aggregate is perlite, hyperlite, vermiculite, fly ash, expanded clay, pumice stone powder and mixtures thereof.
In yet another aspect of the present invention, the resin is selected from styrene-butadiene, polyvinyl acetate, acrylic and mixtures thereof.
In still another aspect of the present invention, a finish composition is provided that includes titanium dioxide, calcium carbonate, silicates and/or water.
In a further aspect of the present invention, the invention is directed to a finish composition with about 4% to about 10% by weight of a lightweight aggregate, about 10% to about 30% by weight of a resin dispersion, less than about 10% by weight water, and the remainder including additional filler and/or aggregate materials.
Advantages of the present invention will become readily apparent to one skilled in the art upon a reading and understanding of the present disclosure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
In accordance with aspects of a preferred embodiment, a textured finish composition is disclosed which includes a lightweight aggregate. The textured finish composition includes a polymeric resin dispersion and an aggregate.
The finish compositions of the present invention include at least one resin dispersion. A resin dispersion as defined in the present invention is intended to embrace those water soluble and water dispersible film-forming resins conventionally employed in finish compositions. These include aqueous colloidal dispersions of polymers from the polymerization of monomers such as acrylic acid, methacrylic acid, methylmethacrylate, ethylmethacrylate, ethylhexylacrylate, tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride, butadiene-1-3, isoprene, chloroprene, styrene, nitrites, acrylamide, vinyl alcohol, methacrylamide, acrylonitrile, vinyl chloride, vinyl acetate, vinylidene chloride, ethylene, propylene and isobutylene; drying oil fatty acid compounds such as tuna oil, linseed oil, soybean oil, dehydrated castor oil, cottonseed oil, poppyseed oil, safflower oil, and sunflower oil; fatty acids derived from drying oils; partially polymerized drying oils such as partially polymerized linseed oil; oxidized drying oils such as oxidized soybean oil, synthetic drying oils obtained by the esterification of fatty acids with polyhydric alcohols (e.g., glycerol pentaerythritol, mannitol and sorbitol); drying oil—alkyd resins of the type obtained by reacting a drying oil fatty acid with polyhydric alcohol and a polycarboxylic acid such as maleic anhydride, fumaric acid, phthalic acid, adipic acid, sebacic acid, and the like; the polysufides, epoxides, amino resins such as urea-formaldehyde, melamine formaldehyde, nitrocellulose, ethyl cellulose, cellulose butyrate, chlorinated poly ethers, terpene resins, chlorosulfonated polyethylene natural rubber, organo siloxane polymers, as well as other film-forming binders employed in water based paints, as well as other film-forming binders employed in water based compositions for coatings.
Suitable commercially available polymeric coating formulations generally contain from about 40 to about 60 weight percent of an emulsified polymer and include, but are not limited to, natural rubber, styrene-butadiene copolymer, butadiene-acrylonitrile copolymers, polyvinyl chloride, polyvinyl acetate, copolymers of vinylidene chloride and acrylonitrile, polytetrafluoroethylene, ethylacrylate-methacrylate copolymers, butadiene-styrene-acrylonitrile copolymers, isobutylene-isoprene copolymers, acrylonitrilebutylacrylate-methacrylic acid copolymers, styrene-butylacrylonitrile, octyl acrylate and methacrylic acid, copolymers of methyl methacrylate, ethyl acrylate and ammonium methacrylate.
The aggregate is contemplated as being any particulate with a weight that is less than that of sand. Preferably, the aggregate comprises a lightweight particulate such as expanded minerals and others, having densities below about 0.31-1.33 grams per cubic centimeter. Such lightweight aggrega
Lelli David A.
Patil Chander
Dryvit Systems, Inc.
Fay Sharpe Fagan Minnich & McKee LLP
Niland Patrick D.
LandOfFree
Structural finish does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structural finish, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structural finish will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3069476