Patent ID: 8912266

Claim:
A thermoplastic elastomer compound comprising: (a) from about 70 to about 85 weight percent of styrene-isobutylene-styrene thermoplastic elastomer; and (b) from about 15 to about 30 weight percent of polyamide including organoclay dispersed in the polyamide; wherein the compound has flexibility and oxygen barrier properties such that: (A) when the compound comprises about 85 weight percent of styrene-isobutylene-styrene thermoplastic elastomer and about 15 weight percent of polyamide including organoclay dispersed in the polyamide, the compound has: (i) Shore A hardness (ASTM D2240, 10 seconds delay) of 68; (ii) Percent Elongation (ASTM D412, Die C) of 292; and (iii) Oxygen Transmission Rate (ASTM D3985 cc·mil/m 2 ·day) of 570; and (B) when the compound comprises about 70 weight percent of styrene-isobutylene-styrene thermoplastic elastomer and about 30 weight percent of polyamide including organoclay dispersed in the polyamide, the compound has: (i) Shore A hardness (ASTM D2240, 10 seconds delay) of 89; (ii) Percent Elongation (ASTM D412, Die C) of 83; and (iii) Oxygen Transmission Rate (ASTM D3985 cc·mil/m 2 ·day) of 55.