Patent ID: 9034972
Filing Date: 2015-05-19
Classification: C08K,C08L

Abstract:
1. An oil-extended olefin block copolymer composition comprising: from 30 wt % to 40 wt % of an ethylene/α-olefin multi-block copolymer consisting of ethylene monomer and a straight-chain or branched, non-conjugated α-olefin comonomer with 3 to 30 carbon atoms; from 45 wt % to 55 wt % of an oil; and from 10 wt % to 30 wt % of a sole filler that is a synthetic precipitated silica and the composition has a normalized oil-bleed index of less than 20 after 1 week at 23° C., and a Shore A hardness from about 5 to about 50.