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X_Butyl I4565P - a New Class of Butyl Rubber from Lanxess for Inner Liner Applications
A new material based on brominated butyl rubber - LANXESS X_Butyl I4565P - has been developed which contains a persistent ionic charge attached to the butyl backbone. The ionic interactions produce significant changes in the physical, mechanical and rheological properties of the raw polymer. The additon of low levels of the butyl ionomer material to inner liner formulations cause significant effects on the compound rheology and final cured article properties. For example, LANXESS X_Butyl I4565P-containing compounds show improved green strength which can improve the dimensional stability for OTR manufacture. The final cured article shows improved crack growth resistance, adhesion to carcass compounds and significantly reduced permeation rates relative to CIIR/NR blends.