US1938015A - Imitation rubber and process of manufacturing the same - Google Patents

Description

Patented Dec. 5, 1933 V IMITATION RUBBER AND PROCESS OF MANUFACTURING THE SAME Shozo Fuji and Tatsuzo Fukuda, Utsunomiya- Shi,

Japan No Drawing. Application May 15, 1931 Serial No. 537,750

2 Claims.

This invention has relation to the manufacture or production of imitation rubber from vegetable oils by the action of lead salts and the object of the invention is to produce a lead salt of fatty 5 acid in the form of a liquid of viscous character having the properties to a certain extent of natu-' ral rubber and which may be used as a substitute therefor in many industries, being, when dry, flexible, elastic and transparent also insoluble in dilute mineral salts or fatty acids, and being also waterproof.

In carrying our invention into effect, we heat a vegetable oil such as the oil of perilla coimoides to 250 C., stirring the same strongly and we then add slowly 510% of lead carbonate and then heat them step by step to 300 C., and after being stirred for about thirty minutes in the same condition, carbonic acid gas escapes therefrom as bubbles.

When the mixtures'have been allowed to cool to 200 0., there appears a yellowish brown'viscous liquid on the surface in which lead salts of fatty acids are the main components.

This liquid consists of different formations by the quantity of lead salt, and there may be derived various viscous liquids by the process. Several liquids can be obtained for use in painting upon paper or cloth. The liquid will permeate the material to which it is applied, and when the material is dried in the air the liquid absorbs oxygen and solidifies, thus producing the required This imitation rubber. or rubber substitute is elastic and flexible yet will not dissolve in dilute -mineral salts or fatty solvents.

Shiny films, are produced, which are heat proof and water proof and are similar to natural rubber in external appearance and will not harden or temperature.

and to the sense of touch slacken under changes in The liquid material when pamted on the surface of metal or woodis stainless and anti-septical and also when painted on the surface of cloth has the effect of protecting the same from moisture.

We claim:

1. The process for th e productionof imitation oil to form a lead salt of the oil, whereby a rubberlike material is obtained. I

2; A viscous rubber like product resulting from the reaction of 5 to 10% of lead carbonate on a vegetable oil, which product, on exposure to air, congeals, is flexible and transparent and is insoluble in water, fatty salts;

acids or dilute mineral SI-IOZO FUJI. TATSUZO FUKUDA.