Purpose of Testing
ACE Laboratories evaluated the performance of Austin Black 325 in a butyl inner liner application. For this study, 40 phr Austin Black 325 (AB325) was substituted for 20 PHR of N660 Carbon Black in a standard tire inner liner formulation to determine the value of AB325.
Of the various ASTM tests performed, the compound containing Austin Black 325 provided a 21.6% improvement in air retention, as well as similar physical properties and MDR Rheology to the compound only containing N660. To see how this result fits alongside polymer selection, cure, and mixing decisions, read which other levers reduce gas permeability in a formulation.
Formulations
Mix Procedure
Compounds Mixed – 1.57 Liter BR Banbury at 65 RPM’s
ASTM Tests
Various ATSM Tests Performed on Each Batch
MDR Rheology
Mooney Viscosity
Physical Properties
Air Permeability Findings
Conclusion
Austin Black 325 is shown to improve air retention by 21.6% when used in these tire inner liner applications. Additionally, the compound containing Austin Black 325 had similar physical properties and MDR Rheology to the compound only containing N660. If you would like to test the value of Austin Black 325 in your products, request a sample.