Patent ID: 8349949

Claim:
A thermoplastic alloy comprising: (a) from 20 to 40 wt % of the total polymer weight of polymer of a condensation polymer having polar groups; and (b) up to 80 wt % of a crosslinked dispersed elastomeric modifier comprising: (i) from 40 to 80% by weight of a first interpolymer of ethylene and an alpha-olefin having from 4 to 12 carbon atoms grafted with from 0.1 to 4 wt % of an acid functionality; wherein the first interpolymer is obtained from a process using a metallocene based catalyst, and has: a Melt Index, as measured according to ASTM 1238D, of from 0.3 g/10 min to 100 g/10 min, a molecular weight distribution (Mw/Mn) of 3.5 or less, and a density of from at least 0.85 g/cm 3 to less than 0.89 g/cm 3 prior to being grafted; and (ii) from 60 to 20% by weight of an ungrafted diene containing interpolymer derived from ethylene and an alpha-olefin having from 3 to 12 carbon atoms; wherein the thermoplastic alloy has a flexural modulus of from 100 MPa to 700 MPa and wherein the thermoplastic alloy has weight increase after oil aging at 100° C. of less than 25%.