Patent ID: 8080607

Claim:
A process for manufacturing a part, comprising: providing a polymeric composition wherein the polymeric composition includes: i) a thermoplastic polyolefin, wherein the thermoplastic polyolefin includes a relatively high crystallinity portion having a crystallinity greater than 65% as measured according to ASTM D3417, wherein the concentration of the relatively high crystallinity portion is at least 70 weight percent based on the total weight of the thermoplastic polyolefin, the relatively high crystallinity portion has a melt flow rate from about 4 to about 29 g/10 min measured at 230° C./2.16 kg, and the relatively high crystallinity portion includes one or more polypropylenes present at a concentration of at least 95 weight percent based on the total weight of the relatively high crystallinity portion, and the one or more polypropylenes of the relatively high crystalline portion are one or more polypropylene homopolymers; ii) from 10 percent by weight to 50 percent by weight of a polyolefin elastomer based on the total weight of the polymeric composition; wherein the polyolefin elastomer has a melt flow rate measured at 190° C./2.16 kg from about 0.5 to about 25 g/10 minutes and is formed of one or more SLEPs, LEPs, or both and consists of copolymers of ethylene and one or more α-olefin comonomers; and iii) at least 9 percent by weight filler based on the total weight of the polymeric composition, wherein the polymeric composition is without any calcined filler or contains less than 0.1 percent by weight calcined filler based on the total weight of the polymeric composition; and shaping the polymeric composition into a part; wherein the composition has a flexural modulus from about 1700 to about 2500 MPa, and the part has a surface formed of the polymeric composition and the surface exhibits a scratch resistance of at least 10 newtons, as measured by FLTM BN108-13; wherein the thermoplastic polyolefin includes one or more lower crystallinity grades of polypropylene having a crystallinity less than the relatively high crystallinity portion, wherein the concentration of the one or more lower crystallinity grades is at least about 2 percent by weight and less than about 10 percent by weight based on the total weight of the polymeric composition; and the lower crystallinity grade includes istoactic polypropylene.