Patent ID: 6639020
Filing Date: 2003-10-28
Classification: C08K,C08L,C09J

Abstract:
A plasticized polypropylene thermoplastic composition comprising a blend of:A) from 50 to 99.9 wt % of an isotactic thermoplastic polymer derived from polypropylene, optionally with one or more copolymerizable monomers selected from C2-C10 &agr;-olefin or diolefin, said polymer having a melt flow rate (MFR) (ASTM D1238) of from 0.3 to 1000 dg/min. and a crystallinity by differential scanning calorimetry of from 0 to 70%; B) from 0.1 to 50 wt % of at least one ethylene copolymer having a weight-average molecular weight (Mw) GPC) of from 500 to 10,000, a molecular weight distribution (MWD) (GPC) of from greater than 1.5 to less than or equal to 3.5, and a comonomer content of from greater than or equal to 20 mol % to less than 33 mol %, wherein said at least one ethylene copolymer is an ethylene-propylene, ethylene-butene, or ethylene-hexene copolymer; and optionally C) from 0 to 20 wt % of a thermoplastic polypropylene modifier compound other than that of B).