US2380219A - Spray coating composition - Google Patents

Description

Patented July 10, 1945 SPRAY COATING COMPOSITION Charles H. Clinton, Milwaukee, Wis., assignor to Spray Wax Sales 00.. Milwaukee, Wis., a corporation of Wisconsin No Drawing. Application January 1, 1944, Serial No. 516,736

2 Claims.

The present invention relates in general to improvements in the art of protectively coating diverse elements, and relates more specifically to the manufacture or production of wax or similar material for coating relatively smooth surfaces.

The primary object of my invention is to provide an improved wax product or the like, having embodied therein a, visible indicator for clear- 1y defining the coated area to which the product has been applied.

While it has heretofore been proposed to expedite the application of various kinds of wax to diverse surfaces, by spraying the coatingmaterial upon these surfaces; it has been extremely dimcult to apply coatings of uniform thickness with the prior spray methods because of the fact that the wax products heretofore available were not adapted to clearly and visibly indicate the actual areas coated by the spray. Spray wax is delivered from a nozzle in liquid form and should be deposited upon the surfaces which are to be coated, in relatively thin layers, and if uniform thickness of these layers when applied to extensive and relatively smooth surfaces. is desired. it is necessary to avoid excessive overlapping of the adjacent spray deposits. In orderto'eliminate such overlapping of the spray deposits, the

individual applying the wax must have some visible indication as to the extent of the successive and adjoining coated zones, because the wax itself is ordinarily transparent and dries very quickly. I have discovered that by embodying a suitable indicator directly within the liquid wax and by properly proportioning the indicator to the rema ning ingredients of the mixture. a thin layer of fine visible dust may be caused to appear upon the surface of the wax coating immediately after the successive coating deposits become dry, and since such drying action is very rapid, undesirable overlap of adjoining deposits can be readily avoided and uniform application of the coatings is assured.

It is therefore a more specific object of the present invention to provide an improved spray wax containing a suitable indicator which will promptly appear upon the wax coated surfaces so as to permit the individual applying the wax to constantly and promptly determine the extent of the coated areas.

Another specific object of this invention is to provide an improved spray coating composition having embodied directly therein anindicating substance which will promptly crystallize and appear in the form of a thin layer of fine dust,

whenever the composition is deposited in the form of a thin film and is permitted to dry.

These and other specific objects and advantages of my invention will be apparent from the following detailed description, and whileI have specifically referred to the new composition as a wax product, the provision of a visible indicator embodied in proper proportions directly within spray coating substance is the gist of my invention, and it is not my desire or intent to unnecessarily restrict the scope or utility of the im-' provement by the use of specific terms.

My improved composition consists primarily of a mixture containing coating substances such as carnauba, paraffin and bees wax, liquids such as naphtha and water, and an indicator such as boron of the type adapted to crystallize into fine dust formation when dry, mixed in proper proportions so as to provide a liquid emulsion adapted to be sprayed upon diverse surfaces.

In preparing the improved composition in accordance with the present invention, I prefer to utilize the several ingredients in approximately the following proportions, namely, below nine per cent by weight of the several wax ingredients, below nine-tenths of one per cent of the indicator, above sixty per cent of naphtha or other quick drying agent. and the remainder of water or other inert liquid. If the three types of wax specifically mentioned are utilized the percentage of each should not exceed three per cent, and the percentage of bees wax should preferably be slightly less than that of the others. These various ingredients should be thoroughly mixed and maintained in liquid condition subject to immediate use, and by limiting the quantity of each of the ingredients of the proportions specified, uniform coating of high lustre and transparency may be produced and a visible indication or dust layer of pronounced visibility may be rapidly obtained.

When utilizing the improved emulsion or wax product to spray coat a surface, the surface to be coated should first be properly cleaned and all grease and other foreign deposits should be removed. The cleaned surface should then be polished and dried to obtain maximum lustre, and the fluent wax product should be well shaken or agitated in order to insure thorough mixing of the ingredients. The emulsion may thereafter be sprayed upon the surface with a suitable spray gun and in the presence of compressed air, so as to deposit successive and adjoining coated areas or zones. As these deposits are made, the naptha, or other drying agent used, quickly evap- Jrates the free liquid and causes the wax to adhere to the surface while the indicator crystallizes and is deposited uniformly upon the wax coating in the form of a thin layer of visible dust. This dust may subsequently be brushed oil of the hardened and transparent wax coating thus leaving a brilliant and effective protective coating upon the surface.

From the foregoing detailed description it will be apparent that my present invention provides an improved spray coating composition which is adapted when applied, to promptly give a visible indication of the extent of the coated area without detrimentally affecting the appearance of the final coatings. The improvement is moreover especially applicable to spray wax products for protectively coating air, land and water vehicles, and by properly proportioning the various ingredients in a manner substantially as herein defined, uniform and highly efiicient coatings or protective layers may be rapidly and continuously applied to various surfaces with the greatest of ease. The improved product has proven of great commercial value in various industries, and can be manufactured and sold at relatively moderate cost.

It should be understood that it is not desired to limit this invention to the exact ingredients or to the precise proportions of ingredients herein mentioned or described, for various modifications within the scope of the appended claims may occur to persons skilled in the art.

I claim:

1. A spray coating composition, comprising, approximately nine parts by weight of mixed carnauba, paramn and bees wax, approximately sixty parts of naptha, approximately thirty parts of water, and the remainder of boron of the type adapted to separate from the composition as fine dust when dried, the total parts of said composition constituting one hundred parts,

2. A spray coating composition, comprising,

' approximately three parts by weight of camauba wax, approximately three parts of parailln, approximately three parts of bees wax, approximately sixty parts of naptha, approximately thirty parts of water, and the remainder of boron oi the type adapted to separate from the composition as fine dust when dried, the total parts of said composition constituting one hundred parts.

CHARLES H. CLINTON.