Glass fiber reinforced propylene polymer graft composition

Details Glass fiber reinforced propylene polymer graft composition Glass fiber reinforced propylene polymer graft composition

C - Chemistry, Metallurgy

08

L

C08L 51/06 (2006.01) C08K 9/06 (2006.01) C08L 23/16 (2006.01) C08L 53/02 (2006.01)

Patent

CA 2098536

Disclosed are compositions comprising, (a) a propylene polymer material grafted in the solid state with (i) styrenic polymer and further comprising (ii) ungrafted styrenic polymer, and, optionally (iii) a vinyl comonomer and when the optional vinyl comonomer is used, (iv) styrenic-vinyl copolymer; and (b) glass fibers treated with an organic silane compound; and optionally (c) at least one rubber polymer component comprising (1) from about 0 to 100% of at least one of (i) monoalkenyl aromatic hydrocarbon-conjugated diene block copolymers, (ii) hydrogenated products of (i), or (iii) mixtures of (i) and (ii); and (2) from about 100 to 0% of an olefin copolymer rubber; and (d) a coupling agent for the glass fibers and propylene polymer material plus said rubber polymer. The compositions exhibit a preferred balance of stiffness and impact strength at moderate cost and exhibit excellent surface qualities, making them particularly useful in molded parts.

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