US533666A - Composition for removing paint and rust - Google Patents

Description

" men; STATE- ROBERT W. PFAFELE AND GEORGE p. NORTH, OF SAN FRANCISCO, 1.

' VCALIFORNAIAN com ost-now FOR REMOVJNG PAIN l? AND" RUST} srnomron'rron forming part of Letters Patent No. ssaeean tea February 5,1895. I

' -Application filed rm 11,1894. sainnm iazsa (1% p e' To all whom it may concern.-

Be it known that we, ROBERT W. PFAFFLE and GEORGE L. NORTH, citizens ofthe United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Paint and Rust Removers and we hereby declare the following to be a full, clear, and exact description of the same. 7

Our invention relates to a compound which is especially designed for the. purpose of removing old paint from surfaces to'clean or prepare them for repainting,-and also to remove rust where it has accumulated upon 1101].

Our invention consists in the combination I of certain ingredients whichact to loosen and saponify the old paint, and to leave a smooth surface which will receive a new-coat as'perfectlyras new wood.

In preparing our compound,we employ Irish moss, ethylic "alcohol, commercial potassium hydrate, sodium hydrate, oil of sassafras or.

other heavy volatile oil and water. These are. united in various proportions, but we have found the following proportionsyery satisfactory:Iri'sh moss, twenty pounds; ethylic al-.

cohol, twenty pounds; potassium hydrate, one hundred and thirty-five pounds; sodium hydrate, one hundred and thirty-six pounds; oil of sassafras, one pound; ordinary water,-seventy-two and one-half gallons.

place the amount which has been evaporated.

We then add the sodium hydrateone-fou'rth at a time, until the whole is completely dissolved. The potassium hydrate is then added "in the same manner, the whole mass being constantly stirred during the process, and it is then strained and allowed to cool until it reaches the temperature of about 150. The

oil of Sassafras is added to the alcohol, and

l the two are then mixed into the compound previously prepared, the whole being stirred briskly until a uniform emulsion is formed.

This compound is especially useful in removing rust from iron,- and also in removing old paint from doors and other surfaces which i are either'to be repainted: or otherwise'treated.

The composition is'especially intended for use in removing paint from soft woods where the surface is readily affected by the strong alkaline compounds commonly used, and which often damage the wood by causing the fibers thereof to rise thereby leaving the cleaned surface in a rough condition.

By the addition of the heavy volatile oil, as in our case, when the compound-is applied to thepaintedsurface this oil will protect the wood from the strong-corrosive actionof the alkaline ingredients, and will leave the surface smooth and ready for the application of a coat of fresh paint.

The emulsion, which is of a tolerably thick consistency, is brushed over the surface to be the paint, which it does in a short-ti me, uniting with it. and saponifying itso that the l wholemasscan be easily scraped or washed off, leaving the surface of the wood perfectly smooth. At the/same time,Towi ng to its con.-

sistency, it does not penetrate the wood so as to prevent a new coat of paint adhering. which is the difficulty with all other paint removing compounds. H The surface, after having been cleaned and the mass scraped or washed 0%, may be sand.--

papered,-if desired, (though sand-papering is unnece'ssary,) and is then in condition to receive a new coat. Paintapplied tothis surface will not' blister by exposure .to the sun,

and is in all'respects superior-to paint which has-been applied to a surface not thus pre-- pared.

It will tering the'character of the-compound, and we be manifest that the proportions here- .stated may be changed without materially al- 5 do not desire to. limit ourselves-tothe exact proportions.

The compound is ofa s'u-upy consistency when made, and. when applied. it thickens 10o upon the outside toa jelly-like consistency,

which, while allowing it to take fullefiect upon the paint, effectually prevents its entering the wood so as to prevent the surface from taking another coat of paint.

Having thus described our invention, what tassium and sodium hydrates, oil of SflSSLfl'flQ 5 v and Water mixed in the proportions herein mentioned to form an emulsion which thickens to a, jelly-like consistency-when applied,

substantially as herein described.

hands. 7

ROBERT WJPFAFFLE. I GEORGE L, NORTH; i

NVitnesses: I

S. H. 'NOURSE, J. A. BAYLEs'sK In witness whereof we have hereunto set our