USRE14562E - Ed sta spate office - Google Patents

Description

ALFRED A. WELLS, OF MONTCLAIR, NEW JERSEY.

DISINFEGTAN '1, 8w.

Specification of Reg men Letters Patent. Reisgued Dec, 10,1918,

Io Drawing. original It. 1,280,602, dated October 1, 1918, Serial No. 201,457, filed November 12, 1917. I Application for reissue filed November 7, 1918.: Serial 110,261,578.

.as a paint and varnish remover.

My invention has as a. basis a chlorinated hydrocarbon and a phenol in the preferred form. The chlorinated hydrocarbon is preferably one of the aromatic series and is preffree erably monochlor benzol or at least one of the lower chlor benzols, chlor toluols, chlorinated solvent naphtha, and the like. Monochlorbenzol is satisfactory for the purpose and may be used as the ,vehicle or basis to carry the other materials. a

The disinfect composition may be improved by the addltion of hi her'ehlorinated hydrocarbons, such as the ed chlor compounds, including di or trichlor benzol and the like. Carbolic acid or phenol may be used, especially in amount considerably less than the amountof chlor benzol employed, when the latter is used as the vehicle. I

prefer to employ the carbolic acid in an amount equal to materially less than the amount of the chlor benzol used, in practice an amount of carbolic acid equal to about onethird to one-fourth of the amount of the chlor benzol in the mixture, and sometimes gerously inflammable like gasolene and other solvent liquids which have been used in disinfecting and insecticidal compositions and the chlorinated aromatic hydrocarbons serve very satisfactorily to this end, as their flash point is relatively high. Taking chlor benzol, for example, it will be noted that when ignite on bringing the mass into contact with a layer of the chlor benzol spread out,

from benzol, it is fairly difl'lcult to for example, on a-glass plate. However, the

flash point is somewhat low for certain purposes and I may add to the composition a small amount of carbon tetraichlorid or equivalent aliphatic hydrocarbon, such as dichlor ethylene, chlorinated acetylene and similar chlorinated compound, trichlor ethylene being suited for the purpose. Carbon tetrachlorid is' somewhat cheaper and more readily available than a number of the other solvents mentioned and I prefer touse it, especially in anhydrous compositions ,where water is not present to bring about decomposition of the tetrachlorid.

To retard, the evaporation of the disinfectant, I. may use waxy material and for this purpose, I have found that a special form of wax is of importance. Chlor benzol and carbon tetrachlorid will dissolve rela-- tively large amounts of wax, such for example, as ordinary soft paraflin, Japan wax, and the like, thus clogging the solution with excessive amounts of waxy material and addobtained which is relatively insoluble in the chlor benzol, so that only a relatively small amount is needed. While 10% or 15% or more of soft paraflin wax may be required, I may use only 3% or 4% of the paraflin wax obtained by precipitation in this way. e

For example, wax melting at 127 F. was treated in this 1nanner,yielding on fractiona precipitation a wax melting at 131 F. and 41% of the latter wax sufliced to give a solution evaporating very slowly, due to the formation on the'surfaceofa film of wax which sealed the hydrocarbon in place. In this way the disinfecting material is maintained at the point where it is to be used without evaporation and acts in an eflicient. manner, while as an-insectifuge it has very desirable properties because of the ability of solvents of so penetrating a character as chlor benzol to be maintained under conditions where they do not readily evaporate.

A composition which will serve to illustrate the present invention is prepared by making a stock solution of 1400 c. c. chlor benzol, 320 grams phenol crystals and 200. c. c. of carbon tetrachlorid. To 1 liter of the above composition45 grams of precipitated parafiin wax was-added and the, solntion shaken until the wax'was incorporated,

.this being facilitated by warning slightl A slowly evaporating composition smtab e fied by the use of other solvents than that a as. a disinfecting solution and having satisfactory softening or dissolving action on dried films of paint or varnish was obtained.

The composition may be variously modiillustratively indicated. In some cases the addition of a small amount ofd desirable, especially for disinfeptmg compositions which are intended to be used in I the form of emulsions.

Instead of phenol, cresol or other equivalent phenolic bodies may be used, The amount of carbon tetrachlorid employed may be varied, but usually only a small proportion, say, 10% or so, is needed to raise the flash point above that at which the composition on a flat surface may-be ignited by flame in too ready a manner, except by su- 'perheating to well above ordinary atmospheric temperatures.

The proportion of waxemployed in the present composition preferably does not exceed 7% or 8%, and in the preferred form it does not exceed 5%. The use of a wax solvent, such as chlor benzol with waxy material in such relatively small amount, 'yet capable of forming a film on exposure which retards evaporation, constitutes one'of the useful features of my invention.

Beside parafiin wax, ceresin wax may used in like manner. It may be similarly treated by dissolving the ceresin and precipitating with a suitable precipitating agent, or by dissolving the wax in a solvent while warm and coohng the wax. so as to secure precipitated wax useful in the present composition. In like manner, Montan wax, beeswax and other waxes may be employed.

What I claim is:- 1. composition-of matterf in the roportion of approximately'letOO c. c. c lor benzol, 320 grams phenol crystals and 200 c. c. carbon tetrachlorid witha'small amount of.precipitated parafiin wax.

2. A composition of matter which comprises a large proportion of chlor benzol and soap is.

a smaller proportion each, ofa phenol and carbon tetrachlorid, all incorporated with a small roportionof wax acting as a retardant o evaporation.

3. A composition of matter adapted for use as a disinfecting composition and containing volatile solvents which comprises a large proportion of a liquid chlorinated hydrocarbon of the benzol type and a smaller proportion each of a phenol and a noninflammable chlorinated compound of'the aliphatic series, incorporated with a retardant of evaporation comprising waxy material in an amount sufiicient to substantially retard evaporation of said volatile solvents.

4. A composition of matter adapted for use as a disinfectant and containing volatile solvents whose evaporation is retarded,

thereby enabling them to exert a local action,

which composition comprises as its largest ingredient, a liquid chlorinated hydrocarbon material incorporated with a substantially smaller proportion of a phenolic body and not over about 8% of a waxy material, the latter serving to retard evaporation; said composition not being readily ignitible when 7 spread out on a flat surface. and a flame dropped into contact with the surface of said composition.

-5. A composition of matter adapted to be used as a disinfectant having as its largest constituent, a mixture of liquid chlorinated aromatic hydrocarbon and a liquid chlorinated aliphatic hydrocarbon, and in addition thereto smaller quantities of a phenol, such material being incorporated with an amount of waxy material sufficient to retard evap0 ration.

6. A. composition of matter in the proportion of approximately 1400 c. c. chlorbenzol, 200 c. c. carbon tetrachlorid and a small amount of precipitated paraffin wax.

'7. A composition of matter which comprises a large proportion of chlorbenzol and a smaller proportion of carbon tetrachlorid incorporated with a small proportion of, wax

actingas a retardant of evaporation.

AL FRED A. WELLS.