A composition of matter composed of a thermoplastic elastomeric hydrocarbon block copolymer having 0.1 to 8 percent polysiloxane, or silicone oil, uniformly distributed throughout. The composition exhibits improved surface, elasticity, and tensile strength characteristics as well as superior processibility....http://www.google.com/patents/US4386179?utm_source=gb-gplus-sharePatent US4386179 - Hydrocarbon block copolymer with dispersed polysiloxane
