METHOD FOR MANUFACTURING AN ELASTOMERIC COMPOSITION HAVING A SELF-SEALING PROPERTY

摘要

The invention relates to a method for manufacturing an elastomeric composition having a self-sealing property containing at least (a significant percentage of parts by weight percent of a solid elastomer): a blend of at least two solid elastomers, a polybutadiene elastomer or a butadiene copolymer, referred to as "elastomer A", and a natural rubber elastomer or synthetic polyisoprene, referred to as "elastomer B", the elastomer A : elastomer B weight ratio being in the range of 10:90 to 90:10; between 30 and 90 percent of a hydrocarbon resin; 0 to less than 30 percent of a filler, wherein, during a first step or step (a), a master batch is prepared, comprising at least elastomers A and B and between 30 and 90 percent of a hydrocarbon resin, by mixing said various components in a mixer at or up to a so-called "hot-mixing" temperature, which is higher than the softening temperature of the hydrocarbon resin.