US1927872A - Rubbing compound - Google Patents

Description

Patented Sept. 26, 1933 UNITED STATES 1,927,872 RUBBING COMPOUND Paul H. Kramer, Detroit,.Mich., assignor to Park Chemical Company, Detroit, Mich a corporation of Michigan No Drawing. Application May 23, 1930 Serial No. 455,144

4 Claims.

My invention relates to an abrasive composition adapted for use in cutting down and polishing lacquered, painted, varnished or enameled surfaces. It embraces a new material for use 5 in the art and the method of manufacturing the same.

The abrasive or rubbing compounds which have been used heretofore consist of abrasives suspended in oil-water emulsions in which a stearate soap has formed a jelly to promote the stability of the whole; or similar suspensions in which wax has been incorporated with the oil; or similar suspensions of abrasives in oil-wax mixtures in which the wax acts as the stabilizing agent. Any of these three types is adapted to use on a rubbing ball of cheese cloth, beef tubing, underwear remnants, or any other suitable textile material. The method of cutting down and polishing lacquered, painted, varnished or enameled surfaces by application of a plastic abrasive or rubbing compound to the surface by means of a rubbing ball is common practice wherever such surfaces are polished.

However, the abrasive or rubbing compounds in 25 common use have serious defects and it is one of the objects of my invention to eliminate these defects.

One of the objects of my invention is to produce an abrasive or rubbing compound which is soft and plastic and stable at temperatures between the freezing point of water and approximately 160 F.

The rubbing compounds which are stabilized by means of a soap jelly are thickened by cooling in their manufacture, and when subjected to abnormally warm temperatures, say above 95 F., they start to soften and precipitate the abrasive out of suspension. In this manner a hard cake of abrasive is formed in the bottom of the container and the material is no longer suitable for use.

The same objection applies to the oil-wax abrasive mixtures. In their case, the softening point is approximately the melting point of the oil- 45 wax mixture, which must be a little higher than 90-95 F. to permit their use at ordinary temperatures. At temperatures in excess of this figure they also precipitate the'abrasive which renders them unfit for use. The oil-wax abrasive mixtures have the further disadvantage of attaining a hard, crumbly condition in cold weather.

Another object of my invention is to produce a material which polishes the lacquered, painted, varnished or enameled surfaces and leaves it clean with no trace of a scum or haze.

This is not true of the compounds which contain a stearate or a wax. In the one case there is always a slight amount of stearic acid or stearate deposited; and in the case of the wax mix- I tures there is a slight deposit of wax on the surface. These defects are overcome by my present invention.

I have found that slight additions of pine oil, a product derived from the steam distillation of pine wood at temperatures below 225 degrees C. to an alkali oleate emulsion of mineral oil and water thicken the emulsion tremendously, changing it from a fairly viscous liquid to a paste easily capable of holding an abrasive, such as tripoli,

in permanent suspension at temperatures between 0 I the freezing point of water and 160 F. or higher. The stability of this emulsion does not depend on the formation of a jelly, or upon any cooling action whatever and, therefore, doesnot vary with changes in temperature. Moreover, the fact that an alkali oleate is easily soluble in water assures its removal in the clean-up operation; and the excess oleic acid, being liquid, also cleans up easily.

The above mentioned phenomenon, that is the thickening of an oil-water-oleate emulsion by additions of pine oil, is probably due to the partial precipitation of the soap. This phenomenon is well known in the case of such addition agents as excess alkali, sodium carbonate, sodium chloride, magnesium chloride, etc., and I believe that a similar occurrence takes place with pine oil. In this case, however, large additions of pine 011 do not seem to cause total precipitation of soap from solution, as is the case with the inorganic salts.

The following is an example of a specific compound embodying my invention and method of producing the same:

20 lbs. of oleic acid (red oil), 122 lbs. kerosene and 7 lbs. pine oil are placed in the mixer.

2 lbs. 0. p. caustic soda are dissolved in 5 gallons of water. The agitator in the mixer is started and the 5 gallons caustic solution is added gradually to the mixer. Then 10 gallons of water is added to the mixer and the mixture stirred until saponification is complete and a stiff paste is formed. Finally, 235 lbs. of double ground cream tripoli is added and the mass stirred until smooth and homogeneous throughout. The resulting compound is too stifi to pour but is soft and plastic.

This is my preferred method of manufacture, but I do not wish to limit myself to the exact no dients may be added in a different order from that described, although I have found the described method to be very satisfactory.

When manufactured as described, the resulting abrasive or rubbing compound is a smooth, homogeneous mass, soft and plastic, but of a consistency too thick to pour; it is stable at all temperatures between 32 F. and 160 F. and, when applied to a lacquered, varnished, painted or enameled surface, cuts down the irregularities, producing a smooth, lustrous surface, free from any sort of scum or haze.

What I claim as my invention is:

1. A rubbing compound for painted, varnished, lacquered or enameled surfaces comprising an aqueous suspension of soap, a finely divided abrasive and pine oil.

2. A rubbing composition for painted, varnished, lacquered or enameled surfaces comprising as primary ingredients an aqueous suspension of soap finely divided abrasive material and a stabilizing oil selected from a class consisting of pine oil and eucalyptus oil of products derived from. steam distillation of vegetable matter at temperatures below 225 degrees C.

3. A compound of the class described consisting of an alkali oleate emulsion'of water and mineral oil, an abrasive in suspension, and a pine oil for thickening said emulsion.

4. An abrasive or rubbing compound adapted for cutting down and polishing lacquered, painted, varnished or enameled surfaces, which consists of, substantially 3 per cent sodium oleate, 95 1 per cent oleic acid, 1 per cent pine oil, 24 per cent kerosene, 47 per cent tripoli and the remainder water.

PAUL H. KRAMER.

CERTIFICATE OF CORRECTION.

man No. 1,927,872.

September 26, 1933.

PAUL H. KRAMER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, lines 84 and 85, claim 2, strike out the words "consisting of pine oil and eucalyptus oil"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of November, A. D. 1933.

(Seal) E. M. liopkina' Acting Commissioner 'of Patents.