Patent ID: 7491765

Claim:
A rubber blend containing: (a) 40-100 phr (parts by weight based on 100 parts by weight of the total rubber mass) of at least one halobutyl rubber; (b) 5-70 phr of at least one delaminated talc having a BET surface area according to DIN 66131 of 10-40 m 2 /g, an average particle size (D 50 ) of 4-8 μm, determined by laser diffraction measurement, and a lamellarity index of 3-15; and (c) 10-100 phr of at least one carbon black having a CTAB surface area according to ASTM-D 3765 of 10-25 m 2 /g and a DBP number according to ASTM-D 2414 of 50 to 160 mL/100 g.