US2327507A - Depilatory composition - Google Patents

Description

Patented Aug. 24, 1943 DEPILATORY COMPOSITION Clarence H. Cox, Normandy, M0.

N Drawing. Application March 5, 1942, Serial No. 433,451

7 Claims.

This invention relates to a novel depilatory compound particularly applicable to the packing industry for use in removing hair or feathers from edible carcasses, such as hogs or chickens.

In the packing industry it is common practice to dip the carcass to be dehaired or defeathered into a tank containing a heated liquid depilatory composition; then the carcass is removed and the resultant coating of the composition allowed to chill or set, the coating or jacket is then stripped off, removing hair and other external excrescences; the jacket may be then melted and reused.

The heretofore known and used depilatory compositions comprise, in general, the combining of rosin with either lard, cottonseed oil, soy bean oil, paraffine oil, petroleum resin, or other vegetable and animal oils, all of which are relatively expensive and are not always applicable to the operating conditions in various packing plants.

It is therefore an object of this invention to provide a new and relatively inexpensive compound which can be quickly and conveniently combined with rosin to form a depilatory composition, which may be used for dipping, spraying or painting the carcass to be dehaired, and which has many other advantages not found in the heretofore known and used depilatory compositions.

The new compound of this invention comprises the rosin residue remaining in the still after all grades of wood rosin, solvents, etc. have been distilled off as by steam method. The resultant product, herein termed rosin residue, has a high flash point, is extremely sticky and mixes very readily with rosin. It should be here pointed out that the rosin residue may vary in viscosity, depending upon the various methods of distillation and manufacturers standard, and may vary from a liquid to a semi-solid at low temperature conditions but when heated, will readily mix with rosin which must also be heated; the resultant heated composition will have good flowing qualities and operate in a desirable manner. This residue has very limited "commercial possibilities at the present time and is more or less of a waste product and thus can be inexpensively purchased for use in the depilatory composition of myinvention.

The rosin residue of this invention when combined with rosin, forms a chill-hardening dehairing composition which will not stain the skin of the carcass, has noobjectionable odor is uniform in color and consistency, and since it may be used at a lower temperature than other com'-' positions (250 F. to 285 F.) it will leave the skin of the carcass in such condition that it may be readily used for tanning purposes. My com pound will also lengthen the useful life of the composition in the packers dipping and melting tanks many times over the present compositions usually maintained at the desired temperature by steam coils or jacketed tanks and it has been found that the composition containing the rosin residue of my invention will not carbonize or coat the coils or tanks which would retard the heat transfer as will the heretofore known compositions.

The proportions of rosin and rosin residue found to be most appropriate for depilatory purposes comprise a major portion of rosin, to and a minor portion of rosinresidue, between 25% to 10%; these proportions may, of course, be readily varied to suit the requirements of the individual packer using the composition, or compensate for the temperature changes of the diiferent seasons of the year. It should be here pointed out that the rosin residue may be blended or mixed with the rosin at the distillery and sold as a complete composition, or it may be sold as a separate compound and blended with the rosin at the plant of the packer using this composition.

It has been found that the composition con-- taining only the. suitable proportions of rosin residue and rosin may be used with complete success in packing plants where the mix is maintained at a relatively low temperature, but where a higher temperature is necessary it has been found desirable to add a small portion of oil or fat to the mixture, amounting to approximately 10% of the rosin residue portion of the mixture; thus, for example, a mixture may consist of 90% rosin, 9% rosin residue and 1% oil. The rosin used with my compound may include the various forms of turpentine rosins or wood rosins, either purified or impure, andeither light or dark, also those known as B rosin or Benny rosin and that bearing the trade name of Belro."

The term "rosin residue, as used in the claims, is intended to mean the rosin residue remaining in the still after all grades of wood rosin, solvents, etc. have been distilled oif as by the steam method.

While only a single embodiment of the invention has been described, it should be understood that certain details may be altered or omitted without departing from the spirit of the-invention, as defined by the appended claims.

I claim:

1. A depilatory composition comprising a minor 5. A depilatory composition comprising a major portion of rosin (75% to 90%,) and a minor portion of rosin residue (25% to 10%) which normally has a viscosity varying from a liquid to semi-solid.

6. A depilatory composition comprising a mum portion of rosin and a minor portion of rosin residue," and an oil in the amount of about 10% of the minor portion volume.

7. A depilatory compound comprising a major portion of rosin (75% to 90%) and a minor portion of rosin residue compound (25% to 10%) which has about 10% oily substance therein.

CLARENCE H. COX.