USRE11811E - Waterproofing compound - Google Patents

Description

pigments and allow theeil or water vehicles of the dyes and printing com pounds to strike through and get agood hold in the fabrics or surfaces to which it is applied, it being very' T0 all whom itjnay concern.-

fiNITED STATES I PATENT. OFFICE.

WILLIAliI-A. HALL, OF BELLOWS FALLS, VERMONT.

" WATERPROOFING coMPou o.

srncmcnnon forming part of Beissued Letters Patent No. 1,1,e11, dated March 6, 1900. Original 1T0. 609,200, dated August 16, 189B- Applicstion for reiuue tiled W 1899- 361491 Be it known that I, W LLIAMA. HALL, a citizen of the United States, residing at Bellows Falls, in the county of Windham and State of Vermont, have invented certain new and useful Improvements in \Vaterproofing Compounds; and I do hereby declare the following to be a full, clear, and exact description of the-invention, such as will enable others skilled in the art to which itappertains to make and use thesame.

This invention relatesto improvements in sizing compounds orinsoluble coatings for papers, my'object being to produce a sizing or coatin-g'for paper which shall possess the desirable quality of insolubility, but which at the same time will readily receive the inks or desirable that these coatings permeable and yet' insoluble to give-a good surface for chromolithography and similar work, This quality of the com pound which I have invented renders it peculiarly adapted for surfacing the walls of rooms or of advertising-signs in! tended for outdoor service or of paper, cloth,

- leather, or analogous substances which it is desirable should receive an insoluble coating and one which is pervious to but unaffected by water and yet remains in such condition as to readily take the inks or pigments used in printing and decorative work.

My new composition as a commercial commodity consists, preferably, of about sixteen parts, by weight, of casein, one part alkali 7 (preferably soda or borax) dissolved in water;

one-half part of a forty;per-cent. solution of formaldehyde, (GH OJ and eighty parts of a mineral base consisting of some finely-comminuted, porous, or absorbent substance-- clay, talc, or infusorial earth serving equally well for this purpose.

In the production of theeompositiou I pref; erably first dissolve the casein in the alkaline solution and then add the mineral base, which mixture thus formed theformaldehyde is' so then added, the above-mentioned proportion should first beworlied up in'water, and to ,the

of the formaldehyde being about three and temperatures;

tent.

the whole mixture being now in liquid form.

is bad on this casein coating after it has once been thoroughly dried when subjected to the action of a mildly-alkaline solution. The effect of using'this earthy or mineral-base as an element of the composition is to retard for a short time the setting'of the composition,

and thus preventing its reaching a-pert'ectlyinsoluble state, and it-further' retards the formaldehyde from precipitating the casein from its solution. B y thus retarding the ac- In fact, no perceptible effect tion of the composition it can be much more easily-handled and its application as a coat- Mg becomes practicable'and'fre'e'd from'many dit'ficulties. A further advantage derived from the use of this porous mineral base is that the earthy'elementgives to paper coated with the compositiona surface that takes ink very readily, for the reason that the pores of the paper do not become closed and obstruct-- ed, so as to prevent the'absorption of the ink or printing fluid, as is the case when a shellac.

or wax coating is used to surface the paper.

While it is important that the compound described above become when driedout quite insoluble and capable of resisting the action ofwater', yet it is equally important that the coating composed of the elements above recited be prevented from too quickly setting and arriving. at a state of complete insolu= bility. One of the reasons for this. is that if the coating become immediately insoluble diificultics in the mechanical application of I the compound in finishing papers, &c.,would arise, such as the immediate hardening of the composition upon the. brushes, implements, and machines by which it is' applied'to the articles'treated. This alone would prevent the commercial success of. the invention and ,o interfere with the application of it to the pure poses for which it is intended to a great, "cx- The composition which 1" hesitati n above may be made up and appliedln a nu'm-;. be: ofdifierent ways in carrying myiuved tion into efiect without vdepartinfg' fr'o n the spirit thereof.

too

'sq' ing inltsandpigments.

Theliquid composition maybe appliedto the article to be coated in any desirable manner, and the color may be varied as desired by the addition of the proper pigments. The

' 5 condition of in'solubility hereinbefore referred to is not'reached for some time after the ap-. -,plication of the coating, thisbeing partlydueto the retarding action of the mineral base -andpartly to the "fact that complete seasonro ing and consequent oiidation of the elements of the composition must take place before a perfect waterproof condition is reached.

' Another method with or without the mineral base,

soluble and resisting the attacks of moisture. I have also discovered that where a iva-ll paint or liquid in which casein is used as a sizing is laid over the surface, allowed to dryeut somethe results are equally good as those obtained whenthe several elementsof the compo varelmixed prior to'their application to the an rfaee tobe coated. 3 v above stated, in aqueous solution the mineral base+suchastalc, clay,&c.whichpossesses absorhent.qualities, may be treated with the j as,' ou',o. ---These substances will absorb" '35.

the gas in-largequantitie's without becoming wet, aud this mineral base so charged with gas'can-be added to the casein solution and producesimilar and equally-good results as -wlienthe' aqueous solution is used, By this,

g alkaline solution oi; casein, formaldehyde, (QI I,'O',') and anearthy minemlbaae-an en'- fnel -aor coating is -prod need-which gives a sufinish to articles which are treated with thegon positionandone which whileinsoluble Iater'i's yet'sn flicie'utly porous to leave the Ejifhich are ylery essential forthe'reception and Qretentionof writing, printing, or lithograph? of applying the compound is to spread a coating of the'casein solution upon the surface to be waterproofed and over the-coat- 'ing thus formed apply an aqueous solution of formaldehyde, the efiectof such treatment being similar to thatproduced by the first.-

named methodviz.,'toproduce acoatinginwhat, and=then treated with formaldehyde sition In lieu of applying the formaldehydqas.

union of the elements before described-an of those abet") rbent qualities- The uses-to which the composition may be put are manifold; Wall-surfaces treated with itam protected from the attacking moisture, which is apt torender them unsightly and ruin them. .Surfaces thus treated are, however, in as good receptive condition for decorative work as before, a condition which it I is impossible, to preserve with someof the shellac or waxy compositions uow'- in use, thesedatter destroying the porosityand absorptive qualities of the surface.'- Leather, paper, and cloth when treatedwiththissizingare rendered quite waterproof and the fabrics protectedfrom the-attacks of moistothem. I Having thus. described my invention, 1

claimand desire 'to secure by Letters Pat ent I 1. A composition for giving au insoluble, porous coating to wall-surfaces, paper, 850.,- composed of a solution of casein, aretarding' agent, ",to.prevent; too'-rapid setting of the- I'naldehyiie,(0H,0.)" t I '2. :A composition for giving an insoluble, porous coating to wall-surfaces, paper, v&c.,." composed of casein, an -alkal i,..a retarding ageut, to preventtoo-rapid setting of the coating and p maldehy de, ,(C H,O.)

porous coating to'wall-surfaces, paper, he composed of casein, an alkali,amineral base, 4

to the coatingmnd formaldehyde, (GHQ; '4. The method of producing aninsolti e com posi tion' for ooatirig-wall-surfaces, paper; -&c.',,which consists in dissolving casein man iug agent and to give porosityto'the coating, f and then infusing formaldehyde (0H,0)'into the compound-thus formed. v i 9 n'-testimony whereof I aflix my signature '95. in presence of two witnesses. 7 \1 *WILLIAM I-IALE.-

Witnesses: f

.WILL'IAM M. BaowksLL, 1

- N. Tainan:

tutt while a highly-finished surface is given- 65 I coating and to,i'nsure its poroslty, an d forto" insure its porosity,and for- 86 3."A.compos1tion for giving aninsoluble, H

toact--as"a retarding agent and give porosity j-= alkali solution, adding a mineralsnbstance to us" said solution to serye'as abuse and retard