Patent ID: 9200152
Filing Date: 2015-12-01
Classification: C08K,C08L

Abstract:
1. An elastomeric nanocomposite comprising: (a) at least one elastomeric polymer comprising units derived from isoolefins having from 4 to 7 carbon atoms, the elastomeric polymer having a viscosity average molecular weight in the range of from 400,000 to 2,000,000; (b) at least 10 phr of a graphitized carbon black, the graphitized carbon black having been prepared by heating a carbon black having an average diameter in the range of 10 to 95 nm to a temperature of 300° C. for at least 8 hours; and (c) from 0.5 to 10 wt % of a smectite or smectite-type nanoclay, wherein the elastomeric nanocomposite has at least 20% less aggregates of the graphitized carbon black and the nanoclay in comparison to the same elastomeric nanocomposite prepared with an ungraphitized form of the carbon black, and wherein when the nanocomposite is used in an article, the article has a gas permeation coefficient of 80.0 cc*mm/[m