METHOD OF MAKING A SUSPENSION OF A FILLER FOR RUBBER MIXTURES

摘要

The method comprises mixing polymeric materials containing a filler with a hydrocarbon solvent in a weight ratio of from 1:0.5 to 1:60. The above mixture is isothermally heated to provide for the thermal decomposition of the polymeric materials and for the formation of a suspension. Low-boiling fractions are distilled from the formed suspension in the presence of an inert gaseous agent at a temperature of 50 to 400.degree.C and a pressure of 1?102 to 1?105 N/m2. The process of the present invention makes it possible to do without scarce or costly materials and at the same time to upgrade the quality of the end product.