Patent ID: 8507604

Claim:
A graft copolymer, comprising: (a) a main chain comprising, in reacted form, at least one monomer selected from the group consisting of (I) acrylic acid and a derivative thereof, (II) methacrylic acid and a derivative thereof, (III) a vinyl ester and a derivative thereof, (IV) styrene and a derivative thereof, and (V) a vinyl group comprising silane compound, whereby at least one of monomer (I)-(V) has a crosslinkable functional group; (b) a side chain comprising, in reacted form, a reactive polyolefin having a meso pentad fraction (mmmm) of from 30 to 80% by mol and having an end unsaturated group in an amount of from 0.5 to 1.0 group per one molecule, the reactive polyolefin being a homopolymer of an α-olefin having from 3 to 28 carbon atoms, a copolymer of two or more α-olefins having from 3 to 28 carbon atoms, or a copolymer of 50% by mass or more of at least one α-olefin having from 3 to 28 carbon atoms and 50% by mass or less of ethylene, wherein the graft copolymer has: (c) a graft ratio of from 1 to 150% by mass; (d) a weight average molecular weight of from 500 to 400,000 measured by GPC; and (e) a molecular weight distribution (Mw/Mn) of from 1.5 to 4.