ASTM D 1765 table 1 classifies the different Carbon Blacks by their analytical properties. For N 990 a target for the Oil Absorption Number is reported to be 43 m3/kg. Reviewing the analytical data from different producers it is obvious that this target is not realistic no matter if tested with DBP, paraffinic oil or epoxidized fatty acid ester. Therefore this target number should be revised in order to reflect the correct long term data, measured in the history of N 990 production.
Keywordscarbon black; classification of carbon blacks; industry reference blacks; typical properties of carbon black types;
Ballot Item Approved as D1765-2014 and Pending Publication