US2701773A - Wall size to be added to a ready-mixed wallpaper paste - Google Patents

Description

United States Patentf) WALL SIZE TO BE ADDED TO A READY-MIXED WALLPAPER PASTE Maurice S. Dovberg and Ike Dovberg, Philadelphia, Pa.

No Drawing. Application April 15, 1953, Serial No. 349,103

1 Claim. (Cl. 106157) Our invention relates to adhesives for holding wall paper, and relates particularly to a dual purpose wall paper adhesive product which may be used as a paste whereby Wall sizing will be eliminated; our product may be added to ordinary wall pastes in order to eliminate wall sizing.

This application is a continuation in part of our prior filed patent application, Serial No. 101,912, filed June 28, 1949, now abandoned.

l-leretofore, paperhangers have used wall paper paste without sizing materials therein. However, a definite type of wall sizing material had to be used with a particular type of wall paper paste. With the present invention the paper hanger may select any type of paste and mix the new composition of our invention with that paste and use the new composition with desirable effects.

Plaster contains lime and when wall paper is placed upon the plastered wall with ordinary pastes undesirable effects such as blistering and staining of the wall paper takes place and the wall paper does not adhere to the wall.

In order to prevent blistering and staining and to make the wall paper adhere, paperhangers have always found it necessary to apply another substance on the wall to offset the undesirable effects aforementioned caused by the lime in the plaster. The extra duty of sizing all newly plastered, painted, calcimined and rough walls involves the loss of time which increases expense.

Heretofore, wall sizing materials were not employed or added to ordinary pastes, since the problem always has been that the paste materials used must react with a definite chemical sizing. In other words, the sizing materials must either be contained in the pastes or be added to ordinary paperhangers pastes to form a definite unit of critical substances which are essential in making up a no-size combination.

Synthetic oil cloths as presently used for wall covering have a tendency to shrink when ordinary wall paper paste is used but with the use of the composition of the present invention in the wall paper paste, then the synthetic oil cloths do not pull apart.

Because of the modern trend in solid colors and deep tone colors they are susceptible to staining, but with the present invention the excess paste may be washed off without leaving paste marks.

Another object of our invention is to provide a paperhangers wall paper composition that may be sold either in a wet or dry form.

Therefore, it is an object of our invention to provide a composition of matter which may be readily mixed with a paperhangers paste by simply adding the essential ingredients together with water at a boiling temperature.

Another object of our invention is to provide a wall paper size whereby a paperhanger may use it with any type of paste.

Another object of our invention is to provide an improved adhesive for hanging Wall paper without the use of any wall sizing material.

Another object of our invention is to provide a preparation to be added to paperhangers pastes wherein the wall paper paste may be more easily applied to the paper and may be applied easily to the wall, thereby providing the very important and necessary give and slide to the wall paper.

Pastes that contain the composition of our invention will not dry too rapidly.

The composition of the present invention not only acts "ice to soothe the burning effects produced by the chemical reaction of the wall paper adhesive with the plaster, paint, calcimine and other rough wall finishes, but also is readily absorbed into the pores of the paper and the plaster and thus forms a solid unit between the wall paper and the wall surface so that as the paste dries slowly it does not burn or stain the paper; hence, blistering and peeling of the paper is avoided. The present composition, when added to the wall paper paste imparts to the latter a slow drying characteristic so that as the paper, paste and wall surface gradually dry out they become lirmly adhered and form a hard, solid unit having a smooth, stainless and clean finish.

Accordingly, another object of our invention is to provide an improvement in paste for paperhangers, wherein the wall paper may be easily placed on the wall without the paste drying too rapidly but wherein the paste will adhere tenaciously without causing staining, blistering, and peeling on the Wall paper. 7

Still another object of our invention is to provide a paperhangers Wall paper composition that may be sold either in a wet or dry form.

Referring to a specific embodiment of our invention wherein the ingredients and their proportions are critical we mix the various ingredients to produce 16 fluid ounces of the liquid preparation of the present invenbe mixed with any ready the combination of the paperhanging elimition. This preparation may mixed wall paper paste and preparation and paste when used for nates the sizing of walls.

The liquid preparation which is to be added to ready mixed Wall paper paste for the purpose of eliminating wall sizing comprises the following: Wheat flour, 10.0 glIL; sugar sucrose, 0.5 kgm.; ammonium alum, 10.0 gnr; dextrin, yellow, 10.0 gm.; silica, 13.0 gm.;- corn syrup, 23.0 gm; wheat syrup, 23.0 gm.; invert syrup, 23.0 gm.; molasses, 25.0 gm.; maple syrup, 22.0 gm.; honey, 20.0 gm; methyl salicylate, 4.0 ml.; and boiling water, 250.0 ml; (milliliters).

The silica settles out of the preparation and helps in preventing the crystallization of the sugar and preserves the product indefinitely. Silica is capable of taking up and holding water and thus prevents the liquid paste from thinning out when allowed to stand overnight or for any length of time. Silica acts as a filler and fills in all openings of the liquid paste mass remaining in suspension, thereby giving liquid paste bouyancy, thickness and more body.

Flow sheet A wall size eliminator comprising the following by weight:

(777) Boiling water milliliters 250.0

The powdered silica used in the wall size eliminator serves as a filler. The silica is a mineral, pure commercial grade of soft decomposed rock, it is a natural non-metallic mineral, 99% pure SiOz. It contains traces of aluminum oxide, calcium oxide, iron oxide and minute traces of water.

Silica which is used as a fine powder serves as a filler in the paste, the function of the silica being to preserve the paste, to act as a filler, to give the paste buoyancy, and to prevent the paste from turning watery while it stands. The silica takes effect when it is used in the paste.

The ammonium alum serves as a non-fermenting agent. It is used with starches. The ammonium alum holds the molecules of the starches firm. The alum also acts as an agent to. promote drying' The quantity of alum specified is of great importance because if more than the quantity set forth is used then the paste would have a tendency to shrink and to dry too quickly.

Winter wheat flour acts as a filler, and also as an emulsifier. The flour acts with the silica by immediately going into suspension when the liquid composition is shaken. This causes the entire composition to become even throughout.

The yellow dextrin makes the product more adhesive.

The molasses is rich in carbohydrates and the richer the product is in carbohydrates the lesser the tendency of the product is to be subject to be attacked by bacteria. The molasses rich in carbohydrates enables the product to last for a long time without deteriorating. It is also a natural adhesive, and increases the viscosity and tenacity of the product.

The corn syrup makes the product more viscous and stickier, in other words. If this corn syrup were omitted, the product would not have the desirable adhesive properties.

Wheat syrup is a cold Water dispersed protein which is prepared by the modification of wheat gluten. Special Wheat protein has a negative polarity in solutions having a pH of 6 or higher and a positive polarity in solutions where the pH is or lower. Wheat syrup provides the composition with a greater adhesiveness and since it is completely soluble it mixes with the globules of the complete composition in liquid form and thereby it maintains its adhesive effectiveness. Although we can use the wheat protein in other forms, it is most advantageously used in the form of wheat syrup, not only because of the relatively low cost of wheat syrup but also because the latter is easily diluted and dissolved in the wall paste mixture.

The preparation of the present invention when added to the wall paper paste increases the density of the paste and so provides a more effective filler for the pores of the wall surface and of the paper to be adhered thereto.

Invert syrup does not crystallize and when it is blended with the molecules of the carbohydrates in general, it adds to the richness of the mass. It has adhesive properties (natural) and it adds tenacity to the mass.

Methyl salicylate is a synthetic winter green oil used as an aromatic agent and has properties that prevent bacteria.

Maple syrup also gives this product richness. quantity of each syrup is used (corn syrup, etc.). Each has a specific action in itself.

Honey also is an agent which gives the product richness and carbohydrate properties.

In combination with the other refiners products, honey adds to the richness in carbohydrates which are reduced in sugars and which gives the finished product specific zones of inhibition, which prevent organisms such as Staphylococcus albus and yeast molds, from affecting the product. The Staphylococcus albus bacteria and the yeast molds are very common bacteria which attack starch products, especially after they have been cooked or they have been mixed with water and allowed to stand.

A small wheat syrup,

All these refiners products serve a definite purpose, each acts as its own agent; not only do they make the complete product exceptionally rich in carbohydrates, which prevent the development of bacteria and preserve the paste, but they all tend to hold the paste product firm and to prevent the paste once it is mixed from turning watery and losing its adhesive effectiveness.

By adding one-half pint or 250 milliliters of boiling water, it produces with the ingredients a liquid size which is adaptable to be added to a ready mixed wall paper paste for eliminating wall sizing.

The procedure for the mix:

Place the sugar in a container, then the ammonium alum is added, then the winter wheat, then yellow dextrin, then silica, these ingredients being all mixed together as they are being combined, following which the mass is sifted through a fine mesh screen to produce a finely powdered dry mix. To this sifted dry powdered mix is then separately added the molasses, the corn syrup, the wheat syrup, the invert refiners syrup, the maple syrup and the honey, after which is added the boiled water at approximately its boiling temperature. Steam is then injected into the mass during mixing thereof, the steam injection being continuous for a period suflicient to insure destruction of all bacteria. All of the aforesaid mixing is effected in a closed container into which the steam is injected to maintain a boiling temperature until such time as the mass commences to boil over, whereupon the further injection of steam is discontinued.

Although our invention has been described in considerable detail, such description is intended as being illustrative rather than limiting, since the invention may be variously embodied, and the scope of the invention is to be determined as claimed.

We claim as our invention:

A wall paper size to be added to ready mixed wall paper paste consisting of the following: wheat flour, 10.0 gm.; sugar sucrose, .5 kmg.; ammonium alum, 10.0 gm.; yellow dextrine, 10.0 gm.; natural silicon dioxide, 13.0 gm.; molasses, 25.0 gm.; corn syrup, 23.0 gm.; wheat syrup, 23.0 gm.; invert syrup, 23.0 gm.; maple syrup, 22.0 gm.; honey, 20.0 gm.; methyl salicylate, 4.0 gm.; and boiled water, 250.0 milliliters.

References Cited in the file of this patent UNITED STATES PATENTS 71,663 Sturgeon Dec. 3, 1867 191,933 Clifford June 12, 1877 488,024 Moore Dec. 13, 1892 551,530 Doebrich Dec. 17, 1895 568,683 Honig Sept. 29, 1896 629,006 Evershed July 18, 1899 2,115,487 Doveberg Apr. 26, 1938 OTHER REFERENCES Gregory: Uses and Applications of Chemicals and Related Materials, 1939, page 55.