Patent ID: 8980994
Filing Date: 2015-03-17
Classification: C08L

Abstract:
1. An elastomeric composition, for elastic film or fiber, comprising: a styrenic block copolymer containing from about 50 wt. % to about 75 wt. % of styrene-butadiene-styrene block copolymer, and from about 20 wt. % to about 50 wt. % of styrene-isoprene/butadiene-styrene block copolymer, where the melt flow rates of the individual S-B-S and S-I/B-S polymers are about 5 g polymer per 10 minutes, or greater, when measured at 200° C. and 5 kg weight according to ASTM D1238; wherein said styrenic block copolymer has a butadiene content of at least about 45 wt. %, said composition optionally further including: 0.0 to about 0.5 wt. % of a primary antioxidant; 0.0 to about 0.5 wt. % of a secondary antioxidant; and 0 to about 0.8 wt. % carbon radical scavenger; wherein the total wt. % of all components is 100%, while said styrenic block copolymer composition exhibits a viscosity change of <25% after 30 minutes continuous exposure to nitrogen at 400° F.