US2078876A - Presaponified buffing compound - Google Patents

Description

Patented Apr. 27, 1937 UNITED STATES PRESAPONIFIED BUFFING COMPOUND Mary F. Hennessey, Waterbury,- Conn. assignor to The Puritan ManufacturingCompany, Waterbury, Conn., a corporation of Connecticut No Drawing.

Application 'October 30, 1936,

Serial No. 108,471

- 6 Claims.

This invention relates to abrasive prepara tions, and more particularly to a solid compound adapted to rub off easily by friction to form a thin coating of abrasive and lubricant upon a revolving buifing wheel for polishing or finishing the surface of a metal or. other material.

Every plater of experience knowns the difficulty with ordinary bufling compositions containing free grease when used on pierced, grooved or fila- 10 greed work;-either the work cannot be satisfactorily cleaned and the plate peels, or else the composition will carbonize and must be brushed out of the depressions and holes.

By means of the present invention, the above and other disadvantages have been overcome.

One object of the present invention is to provide a preparation of the above nature containing a binder for the powdered abrasive material, said binder consisting of a presaponified soluble soap made from fatty acids and triethanolamine.

A further object is to provide a buffing compound of the above nature which may be cheaply manufacturedin cake form, which will be easy and safe to apply to a buffing wheel either manually or mechanically, which will not rapidly deteriorate in storage, and which will be very efficient in use.

A still further object is to provide a bufling compound of the above nature which will contain no free grease or fat, and may easily be cleaned from the articles after bufiing without the use of the strong hot alkali dipping solutions formerly required.

Another object is to provide a bufiing compound of the above nature which will be resistant to the carbonizing action of the heat of the buffing operation and in which the water-soluble presaponified binder, as well as the powdered abrasive, will be washed away quickly from the crevices of the buffed articles when dipped in a weak alkali solution without requiring any subsequent brushing or other mechanical operations.

Another object is to provide a bufiing compound of the above nature having good detergent, lubricating, abrading and polishing powers, but which will not cause stains, oxidation, tarnishing or discoloration of the work, even upon brass or copperarticles. I

With these and other objects in view, there have been disclosed in this specification three forms in which the invention may be conveniently embodied in practice.

Three specific examples of the invention will now be described:-

According to the first example, 100 pounds of oleo-stearine and 20 pounds of v double-pressed stearic acid will be placed in a kettle and melted by being brought to atemperature slightly above degrees F.

To this hot mixture, five pounds of triethanolamine N(C2H4OH)3 will then be added, and the resultant mixture allowed to stand, while still hot, a suflicient time for thorough commingling and to enable the chemical reaction of saponification to be completed.

The above mixture will then be fed into a suitable m'ixing machine, which has been previously heated, and there slowly commingled with 220 pounds of tripoli powder and pounds of powdered flint, this mixing operation generally requiring about one and one-half hours. The compound will then be transferred to suitable molds in which it will be allowed to solidify and harden into cakes of suitable size and shape for convenience in application to buffing wheels. The final mixture will have the following proportions:

Per cent Oleostearine 19.05 Stearic acid 3.81 Triethanolamine .95 25 Powdered abrasive 76.19

Total 100.00

The presaponified compound oi oleostearine, 3U

stearic acid and triethanolamine acts as a soluble binder for the abrasive, and causes the latter to stick to the bufling wheel, and lubricate the work during the abrading or polishing process.

The triethanolamine serves to completely saponify the oleostearine and stearic acid, producing a binder for the abrasive having no excess free grease, and resulting in a soap having full solubility in water and causing the abrasive particles to quickly wash out of the work after buii- 1 ing. The work may thus be easily and quickly cleaned by dipping for a short time in a weak solution of alkali at a low temperature, and consequently will not oxidize the metal or produce stains or discoloration on the surface thereof.

In its polishing action, the present buffing compound acts just like any other good composition; i. e. it cuts like the others and colors like them. However, the resemblance stops there, because the present presaponified compound cleans so much better and faster. This is because no time is required for emulsifying and chemically saponifying the greases that are used'to bind the particles of abrasive together, as is the case with compositions containing free grease.

White compound Per cent stearic acid 16.40 Beef tallow 12.30 Triethanolamine .67 White silica 70.63

Total 100.00

White stainless compound According to the third example, 14 pounds of stearic acid and 9% pounds of beef tallow will be melted and commingled thoroughly with two ounces of triethanolamine. After allowing this mixture to stand as before, '72 pounds of white aluminum oxide will be added and thoroughly incorporated in the mixture, which will then have the following proportions:

Per cent Stearic acid 14.600 Beef tallow 10.150 Triethanolamine .013 White aluminum oxide 75.23?

Total 100.000

In use, the end of the bar of bufling compound will be pressed manually or by mechanical means against a revolving bufling wheel of felt, muslin, or other flexible or semi-flexible material. When a suflicient amount of the compound has been deposited on the bufflng wheel, the article to be abraded, polished or finished will be held against said wheel until the desired abrading action has been secured. The article may then be thoroughly cleaned by dipping it for a short period of time in hot water or a weak solution of alkali.

While triethanolamine has been herein disclosed as the preferred material to be used for saponifying the greases and fatty acids employed in the present buffing compound, it is to be understood that the invention is not limited to this material, but other alkaline materials possessing equivalent mild detergent and emulsification and saponifying properties may also be employed within its spirit and scope. Other such alkaline materials are the following: monoethanolamine, diethanolamine, ethylene diamine, monoamylamine, diamylamine and triamylamine.

It will also be understood that instead of premixing the greasy material and triethanolamine to form a soap before combining with the powdered abrasive, all three of the essential ingredients may be mixed together simultaneously,--the soap being thus formed during the operation of mixing the other ingredients with an abrasive.

While there have been disclosed in this specification three examples of how the invention may be embodied, it will be understood that the invention is not to be limited to these examples, but

may be modified and embodied in various other ways without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent, is:

l. A solid abrasive preparation adapted to be deposited by friction upon a revolving buffing wheel comprising a mixture of a fatty acid, triethanolamine, and a powdered abrasive.

2. A solid abrasive preparation adapted to be deposited by friction upon a revolving buffing wheel comprising a mixture of oleostearine 19.05%, stearic acid 3.81%, triethanolamine .95%, and powdered tripoli and flint 76.19%.

3. A solid abrasive preparation adapted to be deposited by friction upon a revolving buffing wheel comprising a mixture of stearic acid 16.40%, beef tallow 12.30%, triethanolamine .67%, and powdered White silica 70.63%.

4. A solid abrasive preparation adapted to be deposited by friction upon a revolving bufling wheel comprising a mixture of stearic acid 14.600%, beef tallow 10.150%, triethanolamine 013%, and white aluminum oxide '75.237%. I

5. A solid abrasive preparation adapted to be deposited by friction upon a revolving buffing wheel, comprising a fatty acid presaponified with a substance of the class represented by triethanolamine, monoethanolamine, diethanolamine, ethylene diamine, monoamylamine, diamylamine and triamylamine having mild detergent, emulsifying, and saponifying properties, and mixed with powdered abrasive.

6. A solid abrasive preparation adapted to be deposited by friction upon a revolving buffing wheel, comprising a presaponified compound of a fatty acid and triethanolamine mixed with a powdered abrasive.

' MARY F. HENNESSEY.