A Solution Method for the Compounding of Goldenrod Rubber

Abstract

A solution method of compounding rubber has been devised. It is particularly suitable for compounding a soft natural rubber such as that recovered from goldenrod, but it does not appear to be restricted to goldenrod rubber. No particular inherent disadvantage of solution compounding is indicated with hevea rubber. By proper choice of solvent and compounding chemicals, the interesting possibility is presented of improving the quality of those rubbers in which proper dispersion of chemicals is difficult. This method also shows possibilities of being a valuable research tool in the pretreatment of soft synthetic elastomers as a preliminary step to evaluation of their rubber-like qualities.

Cryptostegia Leaf Rubber.

“…The mixture was so tacky that it was unsuitable for processing according to standard rubber mill techniques. It should be noted here that the solution method of compounding developed by McKennon and Lindquist (10) for solvent-extracted goldenrod rubber would be directly applicable to cryptostegia leaf rubber and would make it suitable for processing on conventional rubber mill equipment. However, this type of compounding and precuring was not investigated in this experiment.…”