Patent ID: 8957132
Filing Date: 2015-02-17
Classification: B29C,B29D,B60C,C08J,C08K,C08L

Abstract:
1. A process for the manufacture of an elastomer composition having a self-sealing property comprising (phr meaning parts by weight per 100 parts of solid elastomer): a blend of at least two solid elastomers, a polybutadiene or butadiene copolymer elastomer, referred to as “elastomer A”, and a natural rubber or synthetic polyisoprene elastomer, referred to as “elastomer B”, the elastomer A:elastomer B ratio by weight being within a range from 10:90 to 90:10; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of a filler, wherein, during a first stage (a), a masterbatch comprising the elastomers A and B and between 30 and 90 phr of a hydrocarbon resin is prepared by mixing these various components in a mixer at a “hot compounding” temperature or up to a “hot compounding” temperature which is greater than the softening temperature of the hydrocarbon resin.