US1502598A - Waterproofing for cloth - Google Patents

Description

Patented July 22, 1924.

UNITED STATES NATHANIEL A.,THOMPSON, OF KANSAS CITY, KANSAS.

WATERPROOFING FOR CLOTH.

Ho Drawing.

To all whom it may cmwmm:

Be it known that I, NATHANIEL -A. THOMPSON, a citizen of the United States, residing at Kansas City, in the county of Wyandotte and State of Kansas, have invented certain new and useful Improvements in Waterproofing for Cloth, of which the following is a specification.

The object of this invention is to make a .more perfect water-proofing for cloth that will shed the water under any conditions of weather. Cloth treated by this process has its period of life increased for not only is the fabric protected from moisture, but the ingredients that render it water-proof have no deleterious effect on the fibers.

Because of the excellent water-proofing action of the ingredients as used in my process, the cloth is not stiff as is the case with ordinary water-proofin goods, for a thinner coating accomplishes tie same result.

Another object of my process is to produce a cloth which will be absolutely impervious to water and will not crack when folded.

With these and other objects in view, the invention consists of a process as herein set forth, with the understanding that the several necessary elements entering into the composition may be varied in proportion without departing from the nature and scope of the invention.

To make the water-proofing, a small quantity of rubber is cooked in boiling oil until the rubber has become thoroughly dissolved. Any of the heavier hydro-carbon oils may be used or a vegetable oil, as linseed or cottonseed oil. The vegetable oils have been found to be superior to the mineral oils, but it' will be understood that the invention is not limited to the exact type of oil used.

To the hot mixture of oil and rubber is added a small quantity of asphalt. To this mixture isthen added a finely comminuted filler, such as pulverized calclum carbonate or ferric oxide. The'exact composition of the body does not form part of this invent1on as any ofthe insoluble mineral salts or oxides accomplish the same result.

It has been found by actual experiment Application March 8, 1923. Serial No. 623,725.

that good proportions of the ingredients used are as follows:

Oil 40 to per cent Rubber 5 to 10 per cent Asphalt 5 to 10 per cent Filler 30 to 50 per cent The stiffness of the compound is determined by the proport-ion of the filler added.

The rubber has the property of acting as a binder to keep the asphalt from separating from the oil which would otherwise be its tendency when allowed to stand. The asphalt likewise keeps the finely ground filler in solution and does not allow it to precipitatc. Thus it will be seen that the greater the amount of ground filler added the greater the amount of asphalt necessary and likewise the greater the quantity of rubber. The rubber has the complemental effect on the asphalt that the asphalt has on the filler, i. e., that of holdin it in solution or of forming a blend. W en the water-proofing composition has been prepared a proper colorin may be given to it by means of any suita le pigment.

The water-proofing composition may be applied to the fabric by means of a brush or roller and the fabric is allowed to dry or set from nine to eleven days. The composition has a tendency to become very viscid, due, it is thought, to the oxidizing influence of the air and at the end of nine or eleven days, depending on the temperature and proportion of ingredients used in the composition, the fabric is coated with a water-proofing that is absolutely and uniformly impervious to water because of the perfect blend between the different constituents and the even grade of the compound, regardless of the length of time it has remained in the container.

' What I claim is 1. A water-proofing composition com posed of a viscid vegetable oil, approximately 40 to 50 per cent, rubber 5 to 10 per cent, asphalt 5 to 10 per cent, and a filler of 30 to 50 per cent.

'2. A water-proofing composition composed of cotton seed oil, approximately 40 to 50 per cent, rubber to per cent, asphalt 5 to 10 per cent and a filler 30 to 50 per cent.

3. A process for makin water-proofing composition consisting of oiling a viscid vegetable oil with rubber, adding asphaltand then addin a filler.

a water-proofing oilin cotton seed ng aspha t and then 4. A process or making) composition consistin of oil with rubber, 216151 adding a filler.

5. A process for making a water-proofing composition consisting of boiling 40 to 50 parts of a viscid vegetable oil wlth 5 to 10 partsrubber, adding 5 to 10 parts asphalt and then adding a filler of 30 to 50 parts.

6. A process for making a water-proofing composition consisting of boiling 4:0 to 50 parts of cotton seed oil with 5 to 10 parts rubber, adding 5 to 10 parts asphalt, and then adding a filler of to parts.

In testimony whereof I aflix my signature NATHANIEL A. THOMPSON.