Patent ID: 9556329
Date: 2017-01-31
CPC Classifications: B29B,B29C,B29D,B29L,B60C,C08J,C08K,C08L

Claim:
1. A process for manufacturing a self-sealing elastomer composition, comprising the steps of: a) a masterbatch, comprising at least one unsaturated diene elastomer and between 40 and 80 phr of a hydrocarbon resin, is firstly manufactured by compounding the at least one unsaturated diene elastomer and hydrocarbon resin in a mixer at a temperature or up to a temperature called the “hot compounding” temperature which is above the softening point of the hydrocarbon resin, wherein the at least one unsaturated diene elastomer comprises a greater than 50 phr primary unsaturated diene elastomer selected from the group consisting of polybutadienes, natural rubber, synthetic polyisoprenes, butadiene copolymers, isoprene copolymers, and mixtures thereof; b) then at least one crosslinking system is incorporated into the masterbatch thus prepared, by compounding everything in the same mixer or in a different mixer, at a temperature or up to a temperature which is kept below 100° C., in order to obtain said self-sealing composition; and c) optionally a filler is added with a content between 0 and 30 phr during step 2) or step b),