ExxonMobil Chemical Co., Houston, has introduced a dynamically vulcanized alloy of Exxpro specialty rubber in nylon as a replacement for halobutyl thermoset rubber in tire inner liners. This TPV-type material, Exxpro Nylon DVA, was developed with Yokohama Rubber Co. Ltd., Tokyo, which offers tires with inner liners made of the new material. The alloy combines the flexibility and elasticity of thermoset rubber (a brominated copolymer of isobutylene and paramethylstyrene) with the low air permeability of a thermoplastic. The nylon component enables the alloy to be blown into film on standard equipment with a stacking die. Liners of Exxpro Nylon DVA are 80% thinner than conventional halobutyl liners, which range from 0.8 mm to 1.2 mm. The new liners also provide more than a 90% reduction in air permeability. Overall, tire weight is reduced by about 7% and durability is improved by 20%. (281) 870-6000 . www.exxonmobilchemical.com
ExxonMobil Chemical Co.
13501 Katy Freeway Houston, TX 77079
Phone (281) 870-6000 Fax (281) 870-6661
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